annotate common-kex.c @ 1175:1b8afc698e39

check for zero K value from curve25519
author Matt Johnston <matt@ucc.asn.au>
date Wed, 25 Nov 2015 22:15:59 +0800
parents a9e074b78cd5
children 82e2037d34ea 2bb4c662d1c2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 /*
74
e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files
Matt Johnston <matt@ucc.asn.au>
parents: 36
diff changeset
2 * Dropbear SSH
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 *
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
4 * Copyright (c) 2002-2004 Matt Johnston
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 * Portions Copyright (c) 2004 by Mihnea Stoenescu
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 * All rights reserved.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
7 *
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
9 * of this software and associated documentation files (the "Software"), to deal
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
10 * in the Software without restriction, including without limitation the rights
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12 * copies of the Software, and to permit persons to whom the Software is
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13 * furnished to do so, subject to the following conditions:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 *
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15 * The above copyright notice and this permission notice shall be included in
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16 * all copies or substantial portions of the Software.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17 *
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
24 * SOFTWARE. */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
25
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 #include "includes.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 #include "dbutil.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 #include "algo.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
29 #include "buffer.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 #include "session.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
31 #include "kex.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
32 #include "ssh.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
33 #include "packet.h"
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
34 #include "bignum.h"
858
220f55d540ae rename random.h to dbrandom.h since some OSes have a system random.h
Matt Johnston <matt@ucc.asn.au>
parents: 857
diff changeset
35 #include "dbrandom.h"
575
f9b5dc0cba61 - Disable compression for non-final multihops
Matt Johnston <matt@ucc.asn.au>
parents: 555
diff changeset
36 #include "runopts.h"
759
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
Matt Johnston <matt@ucc.asn.au>
parents: 757
diff changeset
37 #include "ecc.h"
766
d1575fdc29a6 start on ecdsa keys
Matt Johnston <matt@ucc.asn.au>
parents: 765
diff changeset
38 #include "crypto_desc.h"
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
39
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
40 /* diffie-hellman-group1-sha1 value for p */
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
41 const unsigned char dh_p_1[DH_P_1_LEN] = {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
42 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
43 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
44 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
45 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
46 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
47 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
48 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
50 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE6, 0x53, 0x81,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
52 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
53
595
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
54 /* diffie-hellman-group14-sha1 value for p */
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
55 const unsigned char dh_p_14[DH_P_14_LEN] = {
595
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
56 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
57 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
58 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
59 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
60 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
61 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
62 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
63 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
64 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
65 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
66 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, 0x98, 0xDA, 0x48, 0x36,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
67 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
68 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
69 0x20, 0x85, 0x52, 0xBB, 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
70 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, 0xF1, 0x74, 0x6C, 0x08,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
71 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
72 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
73 0xEC, 0x07, 0xA2, 0x8F, 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
74 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18, 0x39, 0x95, 0x49, 0x7C,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
75 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
76 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68, 0xFF, 0xFF, 0xFF, 0xFF,
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
77 0xFF, 0xFF, 0xFF, 0xFF};
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
78
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
79 /* Same for group1 and group14 */
227
ad1b24e39bf3 Make a variables static
Matt Johnston <matt@ucc.asn.au>
parents: 188
diff changeset
80 static const int DH_G_VAL = 2;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
81
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
82 static void kexinitialise();
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
83 static void gen_new_keys();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84 #ifndef DISABLE_ZLIB
771
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
85 static void gen_new_zstream_recv();
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
86 static void gen_new_zstream_trans();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87 #endif
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
88 static void read_kex_algos();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89 /* helper function for gen_new_keys */
762
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
90 static void hashkeys(unsigned char *out, unsigned int outlen,
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
91 const hash_state * hs, const unsigned char X);
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
92 static void finish_kexhashbuf(void);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 /* Send our list of algorithms we can use */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96 void send_msg_kexinit() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
98 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99 buf_putbyte(ses.writepayload, SSH_MSG_KEXINIT);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
100
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 /* cookie */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102 genrandom(buf_getwriteptr(ses.writepayload, 16), 16);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
103 buf_incrwritepos(ses.writepayload, 16);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
104
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
105 /* kex algos */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
106 buf_put_algolist(ses.writepayload, sshkex);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
107
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108 /* server_host_key_algorithms */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
109 buf_put_algolist(ses.writepayload, sshhostkey);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
111 /* encryption_algorithms_client_to_server */
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
112 buf_put_algolist(ses.writepayload, sshciphers);
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
113
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
114 /* encryption_algorithms_server_to_client */
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
115 buf_put_algolist(ses.writepayload, sshciphers);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
116
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
117 /* mac_algorithms_client_to_server */
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
118 buf_put_algolist(ses.writepayload, sshhashes);
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
119
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
120 /* mac_algorithms_server_to_client */
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
121 buf_put_algolist(ses.writepayload, sshhashes);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
122
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
124 /* compression_algorithms_client_to_server */
575
f9b5dc0cba61 - Disable compression for non-final multihops
Matt Johnston <matt@ucc.asn.au>
parents: 555
diff changeset
125 buf_put_algolist(ses.writepayload, ses.compress_algos);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
126
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
127 /* compression_algorithms_server_to_client */
575
f9b5dc0cba61 - Disable compression for non-final multihops
Matt Johnston <matt@ucc.asn.au>
parents: 555
diff changeset
128 buf_put_algolist(ses.writepayload, ses.compress_algos);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
129
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
130 /* languages_client_to_server */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
131 buf_putstring(ses.writepayload, "", 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
132
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
133 /* languages_server_to_client */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
134 buf_putstring(ses.writepayload, "", 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
135
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
136 /* first_kex_packet_follows */
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
137 buf_putbyte(ses.writepayload, (ses.send_kex_first_guess != NULL));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
138
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
139 /* reserved unit32 */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
140 buf_putint(ses.writepayload, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
141
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
142 /* set up transmitted kex packet buffer for hashing.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
143 * This is freed after the end of the kex */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
144 ses.transkexinit = buf_newcopy(ses.writepayload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
145
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147 ses.dataallowed = 0; /* don't send other packets during kex */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
148
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
149 ses.kexstate.sentkexinit = 1;
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
150
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
151 ses.newkeys = (struct key_context*)m_malloc(sizeof(struct key_context));
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
152
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
153 if (ses.send_kex_first_guess) {
801
7dcb46da72d9 merge in HEAD
Matt Johnston <matt@ucc.asn.au>
parents: 793 781
diff changeset
154 ses.newkeys->algo_kex = sshkex[0].data;
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
155 ses.newkeys->algo_hostkey = sshhostkey[0].val;
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
156 ses.send_kex_first_guess();
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
157 }
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
158
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
159 TRACE(("DATAALLOWED=0"))
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
160 TRACE(("-> KEXINIT"))
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
161
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
162 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
163
771
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
164 static void switch_keys() {
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
165 TRACE2(("enter switch_keys"))
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
166 if (!(ses.kexstate.sentkexinit && ses.kexstate.recvkexinit)) {
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
167 dropbear_exit("Unexpected newkeys message");
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
168 }
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
169
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
170 if (!ses.keys) {
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
171 ses.keys = m_malloc(sizeof(*ses.newkeys));
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
172 }
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
173 if (ses.kexstate.recvnewkeys && ses.newkeys->recv.valid) {
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
174 TRACE(("switch_keys recv"))
781
f110d321fe7a Fix build when zlib is disabled, from
Matt Johnston <matt@ucc.asn.au>
parents: 775
diff changeset
175 #ifndef DISABLE_ZLIB
771
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
176 gen_new_zstream_recv();
781
f110d321fe7a Fix build when zlib is disabled, from
Matt Johnston <matt@ucc.asn.au>
parents: 775
diff changeset
177 #endif
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
178 ses.keys->recv = ses.newkeys->recv;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
179 m_burn(&ses.newkeys->recv, sizeof(ses.newkeys->recv));
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
180 ses.newkeys->recv.valid = 0;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
181 }
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
182 if (ses.kexstate.sentnewkeys && ses.newkeys->trans.valid) {
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
183 TRACE(("switch_keys trans"))
781
f110d321fe7a Fix build when zlib is disabled, from
Matt Johnston <matt@ucc.asn.au>
parents: 775
diff changeset
184 #ifndef DISABLE_ZLIB
771
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
185 gen_new_zstream_trans();
781
f110d321fe7a Fix build when zlib is disabled, from
Matt Johnston <matt@ucc.asn.au>
parents: 775
diff changeset
186 #endif
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
187 ses.keys->trans = ses.newkeys->trans;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
188 m_burn(&ses.newkeys->trans, sizeof(ses.newkeys->trans));
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
189 ses.newkeys->trans.valid = 0;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
190 }
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
191 if (ses.kexstate.sentnewkeys && ses.kexstate.recvnewkeys)
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
192 {
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
193 TRACE(("switch_keys done"))
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
194 ses.keys->algo_kex = ses.newkeys->algo_kex;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
195 ses.keys->algo_hostkey = ses.newkeys->algo_hostkey;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
196 ses.keys->allow_compress = 0;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
197 m_free(ses.newkeys);
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
198 ses.newkeys = NULL;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
199 kexinitialise();
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
200 }
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
201 TRACE2(("leave switch_keys"))
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
202 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
203
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
204 /* Bring new keys into use after a key exchange, and let the client know*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
205 void send_msg_newkeys() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
206
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
207 TRACE(("enter send_msg_newkeys"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
208
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
209 /* generate the kexinit request */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
210 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211 buf_putbyte(ses.writepayload, SSH_MSG_NEWKEYS);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 encrypt_packet();
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
213
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
214
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
215 /* set up our state */
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
216 ses.kexstate.sentnewkeys = 1;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
217 ses.kexstate.donefirstkex = 1;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
218 ses.dataallowed = 1; /* we can send other packets again now */
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
219 gen_new_keys();
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
220 switch_keys();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
222 TRACE(("leave send_msg_newkeys"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
224
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
225 /* Bring the new keys into use after a key exchange */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226 void recv_msg_newkeys() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
228 TRACE(("enter recv_msg_newkeys"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
229
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
230 ses.kexstate.recvnewkeys = 1;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
231 switch_keys();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
233 TRACE(("leave recv_msg_newkeys"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
234 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
235
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
236
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
237 /* Set up the kex for the first time */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
238 void kexfirstinitialise() {
575
f9b5dc0cba61 - Disable compression for non-final multihops
Matt Johnston <matt@ucc.asn.au>
parents: 555
diff changeset
239 ses.kexstate.donefirstkex = 0;
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
240
996
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
241 #ifdef DISABLE_ZLIB
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
242 ses.compress_algos = ssh_nocompress;
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
243 #else
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
244 switch (opts.compress_mode)
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
245 {
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
246 case DROPBEAR_COMPRESS_DELAYED:
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
247 ses.compress_algos = ssh_delaycompress;
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
248 break;
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
249
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
250 case DROPBEAR_COMPRESS_ON:
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
251 ses.compress_algos = ssh_compress;
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
252 break;
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
253
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
254 case DROPBEAR_COMPRESS_OFF:
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
255 ses.compress_algos = ssh_nocompress;
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
256 break;
47643024fc90 Disable non-delayed zlib for server
Matt Johnston <matt@ucc.asn.au>
parents: 987
diff changeset
257 }
575
f9b5dc0cba61 - Disable compression for non-final multihops
Matt Johnston <matt@ucc.asn.au>
parents: 555
diff changeset
258 #endif
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
259 kexinitialise();
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
260 }
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
261
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
262 /* Reset the kex state, ready for a new negotiation */
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
263 static void kexinitialise() {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
264
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
265 TRACE(("kexinitialise()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
266
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
267 /* sent/recv'd MSG_KEXINIT */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
268 ses.kexstate.sentkexinit = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
269 ses.kexstate.recvkexinit = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
270
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
271 /* sent/recv'd MSG_NEWKEYS */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
272 ses.kexstate.recvnewkeys = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
273 ses.kexstate.sentnewkeys = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
274
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
275 /* first_packet_follows */
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
276 ses.kexstate.them_firstfollows = 0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
277
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
278 ses.kexstate.datatrans = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
279 ses.kexstate.datarecv = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
280
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
281 ses.kexstate.our_first_follows_matches = 0;
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
282
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 907
diff changeset
283 ses.kexstate.lastkextime = monotonic_now();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
284
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
285 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
286
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
287 /* Helper function for gen_new_keys, creates a hash. It makes a copy of the
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
288 * already initialised hash_state hs, which should already have processed
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
289 * the dh_K and hash, since these are common. X is the letter 'A', 'B' etc.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
290 * out must have at least min(SHA1_HASH_SIZE, outlen) bytes allocated.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
291 *
409
0e69e948caba Add comments about requiring keysize <= 2*SHA1_HASH_SIZE
Matt Johnston <matt@ucc.asn.au>
parents: 257
diff changeset
292 * See Section 7.2 of rfc4253 (ssh transport) for details */
762
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
293 static void hashkeys(unsigned char *out, unsigned int outlen,
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
294 const hash_state * hs, const unsigned char X) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
295
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
296 const struct ltc_hash_descriptor *hash_desc = ses.newkeys->algo_kex->hash_desc;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
297 hash_state hs2;
762
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
298 unsigned int offset;
855
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G.
Matt Johnston <matt@ucc.asn.au>
parents: 852
diff changeset
299 unsigned char tmpout[MAX_HASH_SIZE];
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
300
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
301 memcpy(&hs2, hs, sizeof(hash_state));
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
302 hash_desc->process(&hs2, &X, 1);
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
303 hash_desc->process(&hs2, ses.session_id->data, ses.session_id->len);
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
304 hash_desc->done(&hs2, tmpout);
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
305 memcpy(out, tmpout, MIN(hash_desc->hashsize, outlen));
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
306 for (offset = hash_desc->hashsize;
679
03073a27abb3 - Add hmac-sha2-256 and hmac-sha2-512. Needs debugging, seems to be
Matt Johnston <matt@ucc.asn.au>
parents: 648
diff changeset
307 offset < outlen;
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
308 offset += hash_desc->hashsize)
679
03073a27abb3 - Add hmac-sha2-256 and hmac-sha2-512. Needs debugging, seems to be
Matt Johnston <matt@ucc.asn.au>
parents: 648
diff changeset
309 {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
310 /* need to extend */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
311 memcpy(&hs2, hs, sizeof(hash_state));
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
312 hash_desc->process(&hs2, out, offset);
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
313 hash_desc->done(&hs2, tmpout);
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
314 memcpy(&out[offset], tmpout, MIN(outlen - offset, hash_desc->hashsize));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
315 }
987
ed85797bbc85 clear hash state memory after use
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
316 m_burn(&hs2, sizeof(hash_state));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
317 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
318
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
319 /* Generate the actual encryption/integrity keys, using the results of the
603
3aa74a4d83ae Refer to RFCs rather than drafts, update some section references
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
320 * key exchange, as specified in section 7.2 of the transport rfc 4253.
3aa74a4d83ae Refer to RFCs rather than drafts, update some section references
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
321 * This occurs after the DH key-exchange.
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
322 *
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
323 * ses.newkeys is the new set of keys which are generated, these are only
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
324 * taken into use after both sides have sent a newkeys message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
325
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
326 static void gen_new_keys() {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
327
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
328 unsigned char C2S_IV[MAX_IV_LEN];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
329 unsigned char C2S_key[MAX_KEY_LEN];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 unsigned char S2C_IV[MAX_IV_LEN];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331 unsigned char S2C_key[MAX_KEY_LEN];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
332 /* unsigned char key[MAX_KEY_LEN]; */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
333 unsigned char *trans_IV, *trans_key, *recv_IV, *recv_key;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335 hash_state hs;
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
336 const struct ltc_hash_descriptor *hash_desc = ses.newkeys->algo_kex->hash_desc;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
337 char mactransletter, macrecvletter; /* Client or server specific */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
338
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
339 TRACE(("enter gen_new_keys"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340 /* the dh_K and hash are the start of all hashes, we make use of that */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
341
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
342 hash_desc->init(&hs);
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
343 hash_process_mp(hash_desc, &hs, ses.dh_K);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
344 mp_clear(ses.dh_K);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
345 m_free(ses.dh_K);
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
346 hash_desc->process(&hs, ses.hash->data, ses.hash->len);
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
347 buf_burn(ses.hash);
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
348 buf_free(ses.hash);
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
349 ses.hash = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
350
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
351 if (IS_DROPBEAR_CLIENT) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
352 trans_IV = C2S_IV;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
353 recv_IV = S2C_IV;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
354 trans_key = C2S_key;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
355 recv_key = S2C_key;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
356 mactransletter = 'E';
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
357 macrecvletter = 'F';
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
358 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
359 trans_IV = S2C_IV;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
360 recv_IV = C2S_IV;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361 trans_key = S2C_key;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362 recv_key = C2S_key;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 mactransletter = 'F';
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
364 macrecvletter = 'E';
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
365 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
366
762
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
367 hashkeys(C2S_IV, sizeof(C2S_IV), &hs, 'A');
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
368 hashkeys(S2C_IV, sizeof(S2C_IV), &hs, 'B');
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
369 hashkeys(C2S_key, sizeof(C2S_key), &hs, 'C');
a78a38e402d1 - Fix various hardcoded uses of SHA1
Matt Johnston <matt@ucc.asn.au>
parents: 761
diff changeset
370 hashkeys(S2C_key, sizeof(S2C_key), &hs, 'D');
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
371
681
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
372 if (ses.newkeys->recv.algo_crypt->cipherdesc != NULL) {
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
373 int recv_cipher = find_cipher(ses.newkeys->recv.algo_crypt->cipherdesc->name);
512
0129fd8ccc71 Update nocrypto branch to current head
Matt Johnston <matt@ucc.asn.au>
parents: 511
diff changeset
374 if (recv_cipher < 0)
681
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
375 dropbear_exit("Crypto error");
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
376 if (ses.newkeys->recv.crypt_mode->start(recv_cipher,
252
29afa62b5450 - a hack for grahame to run dropbear with "none" cipher.
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
377 recv_IV, recv_key,
681
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
378 ses.newkeys->recv.algo_crypt->keysize, 0,
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
379 &ses.newkeys->recv.cipher_state) != CRYPT_OK) {
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
380 dropbear_exit("Crypto error");
252
29afa62b5450 - a hack for grahame to run dropbear with "none" cipher.
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
381 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 }
502
43bbe17d6ba0 - Add Counter Mode support
Matt Johnston <matt@ucc.asn.au>
parents: 501
diff changeset
383
681
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
384 if (ses.newkeys->trans.algo_crypt->cipherdesc != NULL) {
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
385 int trans_cipher = find_cipher(ses.newkeys->trans.algo_crypt->cipherdesc->name);
512
0129fd8ccc71 Update nocrypto branch to current head
Matt Johnston <matt@ucc.asn.au>
parents: 511
diff changeset
386 if (trans_cipher < 0)
681
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
387 dropbear_exit("Crypto error");
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
388 if (ses.newkeys->trans.crypt_mode->start(trans_cipher,
252
29afa62b5450 - a hack for grahame to run dropbear with "none" cipher.
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
389 trans_IV, trans_key,
681
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
390 ses.newkeys->trans.algo_crypt->keysize, 0,
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
391 &ses.newkeys->trans.cipher_state) != CRYPT_OK) {
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
392 dropbear_exit("Crypto error");
252
29afa62b5450 - a hack for grahame to run dropbear with "none" cipher.
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
393 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
394 }
512
0129fd8ccc71 Update nocrypto branch to current head
Matt Johnston <matt@ucc.asn.au>
parents: 511
diff changeset
395
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
396 if (ses.newkeys->trans.algo_mac->hash_desc != NULL) {
681
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
397 hashkeys(ses.newkeys->trans.mackey,
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
398 ses.newkeys->trans.algo_mac->keysize, &hs, mactransletter);
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
399 ses.newkeys->trans.hash_index = find_hash(ses.newkeys->trans.algo_mac->hash_desc->name);
252
29afa62b5450 - a hack for grahame to run dropbear with "none" cipher.
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
400 }
712
bf0ac0512ef7 Fix "-m none" case and ugly typo
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
401
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
402 if (ses.newkeys->recv.algo_mac->hash_desc != NULL) {
681
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
403 hashkeys(ses.newkeys->recv.mackey,
a4b7627b3157 Update insecure-nocrypto to current head
Matt Johnston <matt@ucc.asn.au>
parents: 679 512
diff changeset
404 ses.newkeys->recv.algo_mac->keysize, &hs, macrecvletter);
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
405 ses.newkeys->recv.hash_index = find_hash(ses.newkeys->recv.algo_mac->hash_desc->name);
252
29afa62b5450 - a hack for grahame to run dropbear with "none" cipher.
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
406 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407
753
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
408 /* Ready to switch over */
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
409 ses.newkeys->trans.valid = 1;
d63ef1e211ea Take transmit and receive keys into use separately
Matt Johnston <matt@ucc.asn.au>
parents: 746
diff changeset
410 ses.newkeys->recv.valid = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
411
648
4222a1039b06 Clear a few buffers when possible
Matt Johnston <matt@ucc.asn.au>
parents: 603
diff changeset
412 m_burn(C2S_IV, sizeof(C2S_IV));
4222a1039b06 Clear a few buffers when possible
Matt Johnston <matt@ucc.asn.au>
parents: 603
diff changeset
413 m_burn(C2S_key, sizeof(C2S_key));
4222a1039b06 Clear a few buffers when possible
Matt Johnston <matt@ucc.asn.au>
parents: 603
diff changeset
414 m_burn(S2C_IV, sizeof(S2C_IV));
4222a1039b06 Clear a few buffers when possible
Matt Johnston <matt@ucc.asn.au>
parents: 603
diff changeset
415 m_burn(S2C_key, sizeof(S2C_key));
987
ed85797bbc85 clear hash state memory after use
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
416 m_burn(&hs, sizeof(hash_state));
648
4222a1039b06 Clear a few buffers when possible
Matt Johnston <matt@ucc.asn.au>
parents: 603
diff changeset
417
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
418 TRACE(("leave gen_new_keys"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
420
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
421 #ifndef DISABLE_ZLIB
501
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
422
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
423 int is_compress_trans() {
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
424 return ses.keys->trans.algo_comp == DROPBEAR_COMP_ZLIB
501
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
425 || (ses.authstate.authdone
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
426 && ses.keys->trans.algo_comp == DROPBEAR_COMP_ZLIB_DELAY);
501
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
427 }
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
428
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
429 int is_compress_recv() {
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
430 return ses.keys->recv.algo_comp == DROPBEAR_COMP_ZLIB
501
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
431 || (ses.authstate.authdone
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
432 && ses.keys->recv.algo_comp == DROPBEAR_COMP_ZLIB_DELAY);
501
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
433 }
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
434
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435 /* Set up new zlib compression streams, close the old ones. Only
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 * called from gen_new_keys() */
771
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
437 static void gen_new_zstream_recv() {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439 /* create new zstreams */
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
440 if (ses.newkeys->recv.algo_comp == DROPBEAR_COMP_ZLIB
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
441 || ses.newkeys->recv.algo_comp == DROPBEAR_COMP_ZLIB_DELAY) {
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
442 ses.newkeys->recv.zstream = (z_streamp)m_malloc(sizeof(z_stream));
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
443 ses.newkeys->recv.zstream->zalloc = Z_NULL;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
444 ses.newkeys->recv.zstream->zfree = Z_NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
445
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
446 if (inflateInit(ses.newkeys->recv.zstream) != Z_OK) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447 dropbear_exit("zlib error");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
448 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449 } else {
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
450 ses.newkeys->recv.zstream = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451 }
771
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
452 /* clean up old keys */
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
453 if (ses.keys->recv.zstream != NULL) {
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
454 if (inflateEnd(ses.keys->recv.zstream) == Z_STREAM_ERROR) {
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
455 /* Z_DATA_ERROR is ok, just means that stream isn't ended */
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
456 dropbear_exit("Crypto error");
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
457 }
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
458 m_free(ses.keys->recv.zstream);
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
459 }
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
460 }
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
461
a389a2a7aa96 Fix zlib for split newkeys
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
462 static void gen_new_zstream_trans() {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
464 if (ses.newkeys->trans.algo_comp == DROPBEAR_COMP_ZLIB
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
465 || ses.newkeys->trans.algo_comp == DROPBEAR_COMP_ZLIB_DELAY) {
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
466 ses.newkeys->trans.zstream = (z_streamp)m_malloc(sizeof(z_stream));
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
467 ses.newkeys->trans.zstream->zalloc = Z_NULL;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
468 ses.newkeys->trans.zstream->zfree = Z_NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
469
555
daf52f813328 - Add option to change zlib windowBits/memLevel
Matt Johnston <matt@ucc.asn.au>
parents: 534
diff changeset
470 if (deflateInit2(ses.newkeys->trans.zstream, Z_DEFAULT_COMPRESSION,
daf52f813328 - Add option to change zlib windowBits/memLevel
Matt Johnston <matt@ucc.asn.au>
parents: 534
diff changeset
471 Z_DEFLATED, DROPBEAR_ZLIB_WINDOW_BITS,
daf52f813328 - Add option to change zlib windowBits/memLevel
Matt Johnston <matt@ucc.asn.au>
parents: 534
diff changeset
472 DROPBEAR_ZLIB_MEM_LEVEL, Z_DEFAULT_STRATEGY)
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
473 != Z_OK) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
474 dropbear_exit("zlib error");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
476 } else {
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
477 ses.newkeys->trans.zstream = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
478 }
501
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
479
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
480 if (ses.keys->trans.zstream != NULL) {
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
481 if (deflateEnd(ses.keys->trans.zstream) == Z_STREAM_ERROR) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
482 /* Z_DATA_ERROR is ok, just means that stream isn't ended */
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 575
diff changeset
483 dropbear_exit("Crypto error");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484 }
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
485 m_free(ses.keys->trans.zstream);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 }
501
d58c478bd399 Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
488 #endif /* DISABLE_ZLIB */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
489
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
490
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
491 /* Executed upon receiving a kexinit message from the client to initiate
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492 * key exchange. If we haven't already done so, we send the list of our
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493 * preferred algorithms. The client's requested algorithms are processed,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494 * and we calculate the first portion of the key-exchange-hash for used
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 * later in the key exchange. No response is sent, as the client should
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496 * initiate the diffie-hellman key exchange */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497 void recv_msg_kexinit() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498
257
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
499 unsigned int kexhashbuf_len = 0;
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
500 unsigned int remote_ident_len = 0;
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
501 unsigned int local_ident_len = 0;
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
502
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
503 TRACE(("<- KEXINIT"))
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
504 TRACE(("enter recv_msg_kexinit"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 if (!ses.kexstate.sentkexinit) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 /* we need to send a kex packet */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508 send_msg_kexinit();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
509 TRACE(("continue recv_msg_kexinit: sent kexinit"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
511
257
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
512 /* start the kex hash */
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
513 local_ident_len = strlen(LOCAL_IDENT);
1108
2ebf450edc2d Turn sshsession's remoteident attribute into char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1094
diff changeset
514 remote_ident_len = strlen(ses.remoteident);
257
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
515
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
516 kexhashbuf_len = local_ident_len + remote_ident_len
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
517 + ses.transkexinit->len + ses.payload->len
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
518 + KEXHASHBUF_MAX_INTS;
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
519
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
520 ses.kexhashbuf = buf_new(kexhashbuf_len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522 if (IS_DROPBEAR_CLIENT) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
524 /* read the peer's choice of algos */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
525 read_kex_algos();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
527 /* V_C, the client's version string (CR and NL excluded) */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
528 buf_putstring(ses.kexhashbuf, LOCAL_IDENT, local_ident_len);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
529 /* V_S, the server's version string (CR and NL excluded) */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
530 buf_putstring(ses.kexhashbuf, ses.remoteident, remote_ident_len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
532 /* I_C, the payload of the client's SSH_MSG_KEXINIT */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
533 buf_putstring(ses.kexhashbuf,
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
534 (const char*)ses.transkexinit->data, ses.transkexinit->len);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
535 /* I_S, the payload of the server's SSH_MSG_KEXINIT */
1055
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled
Matt Johnston <matt@ucc.asn.au>
parents: 1013
diff changeset
536 buf_setpos(ses.payload, ses.payload_beginning);
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled
Matt Johnston <matt@ucc.asn.au>
parents: 1013
diff changeset
537 buf_putstring(ses.kexhashbuf,
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
538 (const char*)buf_getptr(ses.payload, ses.payload->len-ses.payload->pos),
1055
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled
Matt Johnston <matt@ucc.asn.au>
parents: 1013
diff changeset
539 ses.payload->len-ses.payload->pos);
886
cbc73a5aefb0 requirenext doesn't need two values
Matt Johnston <matt@ucc.asn.au>
parents: 885
diff changeset
540 ses.requirenext = SSH_MSG_KEXDH_REPLY;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541 } else {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
542 /* SERVER */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
544 /* read the peer's choice of algos */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
545 read_kex_algos();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
546 /* V_C, the client's version string (CR and NL excluded) */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
547 buf_putstring(ses.kexhashbuf, ses.remoteident, remote_ident_len);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
548 /* V_S, the server's version string (CR and NL excluded) */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
549 buf_putstring(ses.kexhashbuf, LOCAL_IDENT, local_ident_len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
551 /* I_C, the payload of the client's SSH_MSG_KEXINIT */
1055
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled
Matt Johnston <matt@ucc.asn.au>
parents: 1013
diff changeset
552 buf_setpos(ses.payload, ses.payload_beginning);
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled
Matt Johnston <matt@ucc.asn.au>
parents: 1013
diff changeset
553 buf_putstring(ses.kexhashbuf,
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
554 (const char*)buf_getptr(ses.payload, ses.payload->len-ses.payload->pos),
1055
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled
Matt Johnston <matt@ucc.asn.au>
parents: 1013
diff changeset
555 ses.payload->len-ses.payload->pos);
257
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
556
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
557 /* I_S, the payload of the server's SSH_MSG_KEXINIT */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558 buf_putstring(ses.kexhashbuf,
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
559 (const char*)ses.transkexinit->data, ses.transkexinit->len);
257
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys
Matt Johnston <matt@ucc.asn.au>
parents: 228
diff changeset
560
886
cbc73a5aefb0 requirenext doesn't need two values
Matt Johnston <matt@ucc.asn.au>
parents: 885
diff changeset
561 ses.requirenext = SSH_MSG_KEXDH_INIT;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
564 buf_free(ses.transkexinit);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
565 ses.transkexinit = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566 /* the rest of ses.kexhashbuf will be done after DH exchange */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568 ses.kexstate.recvkexinit = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
569
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
570 TRACE(("leave recv_msg_kexinit"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
571 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572
595
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
573 static void load_dh_p(mp_int * dh_p)
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
574 {
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
575 bytes_to_mp(dh_p, ses.newkeys->algo_kex->dh_p_bytes,
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
576 ses.newkeys->algo_kex->dh_p_len);
595
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
577 }
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
578
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
579 /* Initialises and generate one side of the diffie-hellman key exchange values.
603
3aa74a4d83ae Refer to RFCs rather than drafts, update some section references
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
580 * See the transport rfc 4253 section 8 for details */
84
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
581 /* dh_pub and dh_priv MUST be already initialised */
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
582 struct kex_dh_param *gen_kexdh_param() {
855
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G.
Matt Johnston <matt@ucc.asn.au>
parents: 852
diff changeset
583 struct kex_dh_param *param = NULL;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
584
84
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
585 DEF_MP_INT(dh_p);
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
586 DEF_MP_INT(dh_q);
29a5c7c62350 default initialisers for mp_ints
Matt Johnston <matt@ucc.asn.au>
parents: 79
diff changeset
587 DEF_MP_INT(dh_g);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
588
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
589 TRACE(("enter gen_kexdh_vals"))
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
590
855
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G.
Matt Johnston <matt@ucc.asn.au>
parents: 852
diff changeset
591 param = m_malloc(sizeof(*param));
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 848
diff changeset
592 m_mp_init_multi(&param->pub, &param->priv, &dh_g, &dh_p, &dh_q, NULL);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
593
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
594 /* read the prime and generator*/
595
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
595 load_dh_p(&dh_p);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
596
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
597 if (mp_set_int(&dh_g, DH_G_VAL) != MP_OKAY) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
598 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
599 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
600
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
601 /* calculate q = (p-1)/2 */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
602 /* dh_priv is just a temp var here */
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
603 if (mp_sub_d(&dh_p, 1, &param->priv) != MP_OKAY) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
604 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
605 }
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
606 if (mp_div_2(&param->priv, &dh_q) != MP_OKAY) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
607 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
608 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
609
188
c9483550701b - refactored random mp_int generation and byte->mp_int code
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
610 /* Generate a private portion 0 < dh_priv < dh_q */
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
611 gen_random_mpint(&dh_q, &param->priv);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
612
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
613 /* f = g^y mod p */
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
614 if (mp_exptmod(&dh_g, &param->priv, &dh_p, &param->pub) != MP_OKAY) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
615 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
616 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
617 mp_clear_multi(&dh_g, &dh_p, &dh_q, NULL);
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
618 return param;
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
619 }
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
620
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
621 void free_kexdh_param(struct kex_dh_param *param)
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
622 {
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
623 mp_clear_multi(&param->pub, &param->priv, NULL);
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
624 m_free(param);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
625 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
626
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
627 /* This function is fairly common between client/server, with some substitution
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
628 * of dh_e/dh_f etc. Hence these arguments:
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
629 * dh_pub_us is 'e' for the client, 'f' for the server. dh_pub_them is
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
630 * vice-versa. dh_priv is the x/y value corresponding to dh_pub_us */
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
631 void kexdh_comb_key(struct kex_dh_param *param, mp_int *dh_pub_them,
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
632 sign_key *hostkey) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
633
1013
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
634 DEF_MP_INT(dh_p);
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
635 DEF_MP_INT(dh_p_min1);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
636 mp_int *dh_e = NULL, *dh_f = NULL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
637
1013
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
638 m_mp_init_multi(&dh_p, &dh_p_min1, NULL);
595
2895626d864f Add diffie-hellman-group14-sha1 KEX method
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
639 load_dh_p(&dh_p);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
640
1013
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
641 if (mp_sub_d(&dh_p, 1, &dh_p_min1) != MP_OKAY) {
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
642 dropbear_exit("Diffie-Hellman error");
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
643 }
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
644
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
645 /* Check that dh_pub_them (dh_e or dh_f) is in the range [2, p-2] */
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
646 if (mp_cmp(dh_pub_them, &dh_p_min1) != MP_LT
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
647 || mp_cmp_d(dh_pub_them, 1) != MP_GT) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
648 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
649 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
650
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
651 /* K = e^y mod p = f^x mod p */
805
724c3e0c8734 Add m_mp_alloc_init_multi() helper
Matt Johnston <matt@ucc.asn.au>
parents: 801
diff changeset
652 m_mp_alloc_init_multi(&ses.dh_K, NULL);
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
653 if (mp_exptmod(dh_pub_them, &param->priv, &dh_p, ses.dh_K) != MP_OKAY) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
654 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
655 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
656
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
657 /* clear no longer needed vars */
1013
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are
Matt Johnston <matt@ucc.asn.au>
parents: 996
diff changeset
658 mp_clear_multi(&dh_p, &dh_p_min1, NULL);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
659
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
660 /* From here on, the code needs to work with the _same_ vars on each side,
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
661 * not vice-versaing for client/server */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
662 if (IS_DROPBEAR_CLIENT) {
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
663 dh_e = &param->pub;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
664 dh_f = dh_pub_them;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
665 } else {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
666 dh_e = dh_pub_them;
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
667 dh_f = &param->pub;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
668 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
669
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
670 /* Create the remainder of the hash buffer, to generate the exchange hash */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
671 /* K_S, the host key */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
672 buf_put_pub_key(ses.kexhashbuf, hostkey, ses.newkeys->algo_hostkey);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
673 /* e, exchange value sent by the client */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
674 buf_putmpint(ses.kexhashbuf, dh_e);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
675 /* f, exchange value sent by the server */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
676 buf_putmpint(ses.kexhashbuf, dh_f);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
677 /* K, the shared secret */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
678 buf_putmpint(ses.kexhashbuf, ses.dh_K);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
679
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
680 /* calculate the hash H to sign */
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
681 finish_kexhashbuf();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
682 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
683
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
684 #ifdef DROPBEAR_ECDH
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
685 struct kex_ecdh_param *gen_kexecdh_param() {
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
686 struct kex_ecdh_param *param = m_malloc(sizeof(*param));
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
687 if (ecc_make_key_ex(NULL, dropbear_ltc_prng,
759
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
Matt Johnston <matt@ucc.asn.au>
parents: 757
diff changeset
688 &param->key, ses.newkeys->algo_kex->ecc_curve->dp) != CRYPT_OK) {
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
Matt Johnston <matt@ucc.asn.au>
parents: 757
diff changeset
689 dropbear_exit("ECC error");
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
690 }
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
691 return param;
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
692 }
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
693
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
694 void free_kexecdh_param(struct kex_ecdh_param *param) {
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
695 ecc_free(&param->key);
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
696 m_free(param);
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
697
755
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
698 }
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
699 void kexecdh_comb_key(struct kex_ecdh_param *param, buffer *pub_them,
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
700 sign_key *hostkey) {
759
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
Matt Johnston <matt@ucc.asn.au>
parents: 757
diff changeset
701 const struct dropbear_kex *algo_kex = ses.newkeys->algo_kex;
857
c19acba28590 use oldstyle comments
Matt Johnston <matt@ucc.asn.au>
parents: 855
diff changeset
702 /* public keys from client and server */
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
703 ecc_key *Q_C, *Q_S, *Q_them;
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
704
765
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string()
Matt Johnston <matt@ucc.asn.au>
parents: 763
diff changeset
705 Q_them = buf_get_ecc_raw_pubkey(pub_them, algo_kex->ecc_curve);
1128
a9e074b78cd5 check ecc key return, fix null pointer crash
Matt Johnston <matt@ucc.asn.au>
parents: 1124
diff changeset
706 if (Q_them == NULL) {
a9e074b78cd5 check ecc key return, fix null pointer crash
Matt Johnston <matt@ucc.asn.au>
parents: 1124
diff changeset
707 dropbear_exit("ECC error");
a9e074b78cd5 check ecc key return, fix null pointer crash
Matt Johnston <matt@ucc.asn.au>
parents: 1124
diff changeset
708 }
757
230666086711 ecc key import function
Matt Johnston <matt@ucc.asn.au>
parents: 756
diff changeset
709
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
710 ses.dh_K = dropbear_ecc_shared_secret(Q_them, &param->key);
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
711
848
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
712 /* Create the remainder of the hash buffer, to generate the exchange hash
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
713 See RFC5656 section 4 page 7 */
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
714 if (IS_DROPBEAR_CLIENT) {
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
715 Q_C = &param->key;
759
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
Matt Johnston <matt@ucc.asn.au>
parents: 757
diff changeset
716 Q_S = Q_them;
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
717 } else {
759
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
Matt Johnston <matt@ucc.asn.au>
parents: 757
diff changeset
718 Q_C = Q_them;
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
719 Q_S = &param->key;
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
720 }
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
721
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
722 /* K_S, the host key */
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
723 buf_put_pub_key(ses.kexhashbuf, hostkey, ses.newkeys->algo_hostkey);
759
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
Matt Johnston <matt@ucc.asn.au>
parents: 757
diff changeset
724 /* Q_C, client's ephemeral public key octet string */
765
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string()
Matt Johnston <matt@ucc.asn.au>
parents: 763
diff changeset
725 buf_put_ecc_raw_pubkey_string(ses.kexhashbuf, Q_C);
759
76fba0856749 More changes for KEX and ECDH. Set up hash descriptors, make ECC code work,
Matt Johnston <matt@ucc.asn.au>
parents: 757
diff changeset
726 /* Q_S, server's ephemeral public key octet string */
765
5503e05ab3a4 - Rename buf_put_ecc_pubkey_string() to buf_put_ecc_raw_pubkey_string()
Matt Johnston <matt@ucc.asn.au>
parents: 763
diff changeset
727 buf_put_ecc_raw_pubkey_string(ses.kexhashbuf, Q_S);
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
728 /* K, the shared secret */
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
729 buf_putmpint(ses.kexhashbuf, ses.dh_K);
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
730
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
731 /* calculate the hash H to sign */
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
732 finish_kexhashbuf();
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
733 }
848
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
734 #endif /* DROPBEAR_ECDH */
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
735
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
736 #ifdef DROPBEAR_CURVE25519
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
737 struct kex_curve25519_param *gen_kexcurve25519_param () {
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
738 /* Per http://cr.yp.to/ecdh.html */
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
739 struct kex_curve25519_param *param = m_malloc(sizeof(*param));
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
740 const unsigned char basepoint[32] = {9};
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
741
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
742 genrandom(param->priv, CURVE25519_LEN);
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
743 param->priv[0] &= 248;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
744 param->priv[31] &= 127;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
745 param->priv[31] |= 64;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
746
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
747 curve25519_donna(param->pub, param->priv, basepoint);
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
748
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
749 return param;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
750 }
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
751
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
752 void free_kexcurve25519_param(struct kex_curve25519_param *param)
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
753 {
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
754 m_burn(param->priv, CURVE25519_LEN);
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
755 m_free(param);
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
756 }
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
757
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
758 void kexcurve25519_comb_key(struct kex_curve25519_param *param, buffer *buf_pub_them,
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
759 sign_key *hostkey) {
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 848
diff changeset
760 unsigned char out[CURVE25519_LEN];
848
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
761 const unsigned char* Q_C = NULL;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
762 const unsigned char* Q_S = NULL;
1175
1b8afc698e39 check for zero K value from curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 1128
diff changeset
763 char zeroes[CURVE25519_LEN] = {0};
848
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
764
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
765 if (buf_pub_them->len != CURVE25519_LEN)
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
766 {
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
767 dropbear_exit("Bad curve25519");
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
768 }
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
769
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
770 curve25519_donna(out, param->priv, buf_pub_them->data);
1175
1b8afc698e39 check for zero K value from curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 1128
diff changeset
771
1b8afc698e39 check for zero K value from curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 1128
diff changeset
772 if (constant_time_memcmp(zeroes, out, CURVE25519_LEN) == 0) {
1b8afc698e39 check for zero K value from curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 1128
diff changeset
773 dropbear_exit("Bad curve25519");
1b8afc698e39 check for zero K value from curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 1128
diff changeset
774 }
1b8afc698e39 check for zero K value from curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 1128
diff changeset
775
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 848
diff changeset
776 m_mp_alloc_init_multi(&ses.dh_K, NULL);
848
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
777 bytes_to_mp(ses.dh_K, out, CURVE25519_LEN);
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 848
diff changeset
778 m_burn(out, sizeof(out));
848
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
779
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
780 /* Create the remainder of the hash buffer, to generate the exchange hash.
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
781 See RFC5656 section 4 page 7 */
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
782 if (IS_DROPBEAR_CLIENT) {
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
783 Q_C = param->pub;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
784 Q_S = buf_pub_them->data;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
785 } else {
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
786 Q_S = param->pub;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
787 Q_C = buf_pub_them->data;
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
788 }
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
789
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
790 /* K_S, the host key */
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
791 buf_put_pub_key(ses.kexhashbuf, hostkey, ses.newkeys->algo_hostkey);
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
792 /* Q_C, client's ephemeral public key octet string */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
793 buf_putstring(ses.kexhashbuf, (const char*)Q_C, CURVE25519_LEN);
848
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
794 /* Q_S, server's ephemeral public key octet string */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1108
diff changeset
795 buf_putstring(ses.kexhashbuf, (const char*)Q_S, CURVE25519_LEN);
848
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
796 /* K, the shared secret */
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
797 buf_putmpint(ses.kexhashbuf, ses.dh_K);
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
798
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
799 /* calculate the hash H to sign */
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
800 finish_kexhashbuf();
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
801 }
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
802 #endif /* DROPBEAR_CURVE25519 */
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
803
6c69e7df3621 curve25519
Matt Johnston <matt@ucc.asn.au>
parents: 805
diff changeset
804
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
805
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
806 static void finish_kexhashbuf(void) {
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
807 hash_state hs;
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
808 const struct ltc_hash_descriptor *hash_desc = ses.newkeys->algo_kex->hash_desc;
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
809
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
810 hash_desc->init(&hs);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
811 buf_setpos(ses.kexhashbuf, 0);
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
812 hash_desc->process(&hs, buf_getptr(ses.kexhashbuf, ses.kexhashbuf->len),
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
813 ses.kexhashbuf->len);
793
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
814 ses.hash = buf_new(hash_desc->hashsize);
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
815 hash_desc->done(&hs, buf_getwriteptr(ses.hash, hash_desc->hashsize));
70625eed40c9 A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents: 766
diff changeset
816 buf_setlen(ses.hash, hash_desc->hashsize);
35
0ad5fb979f42 set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
817
907
4a74c58e11fc Make some debug info conditional
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
818 #if defined(DEBUG_KEXHASH) && defined(DEBUG_TRACE)
4a74c58e11fc Make some debug info conditional
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
819 if (!debug_trace) {
4a74c58e11fc Make some debug info conditional
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
820 printhex("kexhashbuf", ses.kexhashbuf->data, ses.kexhashbuf->len);
4a74c58e11fc Make some debug info conditional
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
821 printhex("kexhash", ses.hash->data, ses.hash->len);
4a74c58e11fc Make some debug info conditional
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
822 }
883
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
823 #endif
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
824
35
0ad5fb979f42 set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents: 34
diff changeset
825 buf_burn(ses.kexhashbuf);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
826 buf_free(ses.kexhashbuf);
987
ed85797bbc85 clear hash state memory after use
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
827 m_burn(&hs, sizeof(hash_state));
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
828 ses.kexhashbuf = NULL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
829
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
830 /* first time around, we set the session_id to H */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
831 if (ses.session_id == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
832 /* create the session_id, this never needs freeing */
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 759
diff changeset
833 ses.session_id = buf_newcopy(ses.hash);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
834 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
835 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
836
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
837 /* read the other side's algo list. buf_match_algo is a callback to match
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
838 * algos for the client or server. */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
839 static void read_kex_algos() {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
840
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
841 /* for asymmetry */
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
842 algo_type * c2s_hash_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
843 algo_type * s2c_hash_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
844 algo_type * c2s_cipher_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
845 algo_type * s2c_cipher_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
846 algo_type * c2s_comp_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
847 algo_type * s2c_comp_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
848 /* the generic one */
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
849 algo_type * algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
850
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
851 /* which algo couldn't match */
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
852 char * erralgo = NULL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
853
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
854 int goodguess = 0;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
855 int allgood = 1; /* we AND this with each goodguess and see if its still
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
856 true after */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
857
746
465fefc4f6e0 Put some #ifdef options around first-follows options in case they
Matt Johnston <matt@ucc.asn.au>
parents: 741
diff changeset
858 #ifdef USE_KEXGUESS2
740
3062da90dab8 Add kexguess2 behaviour
Matt Johnston <matt@ucc.asn.au>
parents: 739
diff changeset
859 enum kexguess2_used kexguess2 = KEXGUESS2_LOOK;
746
465fefc4f6e0 Put some #ifdef options around first-follows options in case they
Matt Johnston <matt@ucc.asn.au>
parents: 741
diff changeset
860 #else
465fefc4f6e0 Put some #ifdef options around first-follows options in case they
Matt Johnston <matt@ucc.asn.au>
parents: 741
diff changeset
861 enum kexguess2_used kexguess2 = KEXGUESS2_NO;
465fefc4f6e0 Put some #ifdef options around first-follows options in case they
Matt Johnston <matt@ucc.asn.au>
parents: 741
diff changeset
862 #endif
740
3062da90dab8 Add kexguess2 behaviour
Matt Johnston <matt@ucc.asn.au>
parents: 739
diff changeset
863
855
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G.
Matt Johnston <matt@ucc.asn.au>
parents: 852
diff changeset
864 buf_incrpos(ses.payload, 16); /* start after the cookie */
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G.
Matt Johnston <matt@ucc.asn.au>
parents: 852
diff changeset
865
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G.
Matt Johnston <matt@ucc.asn.au>
parents: 852
diff changeset
866 memset(ses.newkeys, 0x0, sizeof(*ses.newkeys));
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G.
Matt Johnston <matt@ucc.asn.au>
parents: 852
diff changeset
867
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
868 /* kex_algorithms */
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
869 algo = buf_match_algo(ses.payload, sshkex, &kexguess2, &goodguess);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
870 allgood &= goodguess;
740
3062da90dab8 Add kexguess2 behaviour
Matt Johnston <matt@ucc.asn.au>
parents: 739
diff changeset
871 if (algo == NULL || algo->val == KEXGUESS2_ALGO_ID) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
872 erralgo = "kex";
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
873 goto error;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
874 }
740
3062da90dab8 Add kexguess2 behaviour
Matt Johnston <matt@ucc.asn.au>
parents: 739
diff changeset
875 TRACE(("kexguess2 %d", kexguess2))
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
876 TRACE(("kex algo %s", algo->name))
756
bf9dc2d9c2b1 more bits on ecc branch
Matt Johnston <matt@ucc.asn.au>
parents: 755
diff changeset
877 ses.newkeys->algo_kex = algo->data;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
878
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
879 /* server_host_key_algorithms */
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
880 algo = buf_match_algo(ses.payload, sshhostkey, &kexguess2, &goodguess);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
881 allgood &= goodguess;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
882 if (algo == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
883 erralgo = "hostkey";
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
884 goto error;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
885 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 116
diff changeset
886 TRACE(("hostkey algo %s", algo->name))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
887 ses.newkeys->algo_hostkey = algo->val;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
888
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
889 /* encryption_algorithms_client_to_server */
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
890 c2s_cipher_algo = buf_match_algo(ses.payload, sshciphers, NULL, NULL);
116
2010f4119c1a Check for non-matching algos properly
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
891 if (c2s_cipher_algo == NULL) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
892 erralgo = "enc c->s";
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
893 goto error;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
894 }
228
5e4110bb753a - Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents: 227
diff changeset
895 TRACE(("enc c2s is %s", c2s_cipher_algo->name))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
896
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
897 /* encryption_algorithms_server_to_client */
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
898 s2c_cipher_algo = buf_match_algo(ses.payload, sshciphers, NULL, NULL);
116
2010f4119c1a Check for non-matching algos properly
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
899 if (s2c_cipher_algo == NULL) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
900 erralgo = "enc s->c";
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
901 goto error;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
902 }
228
5e4110bb753a - Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents: 227
diff changeset
903 TRACE(("enc s2c is %s", s2c_cipher_algo->name))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
904
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
905 /* mac_algorithms_client_to_server */
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
906 c2s_hash_algo = buf_match_algo(ses.payload, sshhashes, NULL, NULL);
116
2010f4119c1a Check for non-matching algos properly
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
907 if (c2s_hash_algo == NULL) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
908 erralgo = "mac c->s";
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
909 goto error;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
910 }
228
5e4110bb753a - Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents: 227
diff changeset
911 TRACE(("hash c2s is %s", c2s_hash_algo->name))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
912
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
913 /* mac_algorithms_server_to_client */
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
914 s2c_hash_algo = buf_match_algo(ses.payload, sshhashes, NULL, NULL);
116
2010f4119c1a Check for non-matching algos properly
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
915 if (s2c_hash_algo == NULL) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
916 erralgo = "mac s->c";
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
917 goto error;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
918 }
228
5e4110bb753a - Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents: 227
diff changeset
919 TRACE(("hash s2c is %s", s2c_hash_algo->name))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
920
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
921 /* compression_algorithms_client_to_server */
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
922 c2s_comp_algo = buf_match_algo(ses.payload, ses.compress_algos, NULL, NULL);
116
2010f4119c1a Check for non-matching algos properly
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
923 if (c2s_comp_algo == NULL) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
924 erralgo = "comp c->s";
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
925 goto error;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
926 }
228
5e4110bb753a - Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents: 227
diff changeset
927 TRACE(("hash c2s is %s", c2s_comp_algo->name))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
928
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
929 /* compression_algorithms_server_to_client */
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
930 s2c_comp_algo = buf_match_algo(ses.payload, ses.compress_algos, NULL, NULL);
116
2010f4119c1a Check for non-matching algos properly
Matt Johnston <matt@ucc.asn.au>
parents: 84
diff changeset
931 if (s2c_comp_algo == NULL) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
932 erralgo = "comp s->c";
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
933 goto error;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
934 }
228
5e4110bb753a - Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents: 227
diff changeset
935 TRACE(("hash s2c is %s", s2c_comp_algo->name))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
936
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
937 /* languages_client_to_server */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
938 buf_eatstring(ses.payload);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
939
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
940 /* languages_server_to_client */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
941 buf_eatstring(ses.payload);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
942
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
943 /* their first_kex_packet_follows */
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
944 if (buf_getbool(ses.payload)) {
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
945 TRACE(("them kex firstfollows. allgood %d", allgood))
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
946 ses.kexstate.them_firstfollows = 1;
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
947 /* if the guess wasn't good, we ignore the packet sent */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
948 if (!allgood) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
949 ses.ignorenext = 1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
950 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
951 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
952
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
953 /* Handle the asymmetry */
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
954 if (IS_DROPBEAR_CLIENT) {
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
955 ses.newkeys->recv.algo_crypt =
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
956 (struct dropbear_cipher*)s2c_cipher_algo->data;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
957 ses.newkeys->trans.algo_crypt =
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
958 (struct dropbear_cipher*)c2s_cipher_algo->data;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
959 ses.newkeys->recv.crypt_mode =
502
43bbe17d6ba0 - Add Counter Mode support
Matt Johnston <matt@ucc.asn.au>
parents: 501
diff changeset
960 (struct dropbear_cipher_mode*)s2c_cipher_algo->mode;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
961 ses.newkeys->trans.crypt_mode =
502
43bbe17d6ba0 - Add Counter Mode support
Matt Johnston <matt@ucc.asn.au>
parents: 501
diff changeset
962 (struct dropbear_cipher_mode*)c2s_cipher_algo->mode;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
963 ses.newkeys->recv.algo_mac =
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
964 (struct dropbear_hash*)s2c_hash_algo->data;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
965 ses.newkeys->trans.algo_mac =
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
966 (struct dropbear_hash*)c2s_hash_algo->data;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
967 ses.newkeys->recv.algo_comp = s2c_comp_algo->val;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
968 ses.newkeys->trans.algo_comp = c2s_comp_algo->val;
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
969 } else {
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
970 /* SERVER */
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
971 ses.newkeys->recv.algo_crypt =
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
972 (struct dropbear_cipher*)c2s_cipher_algo->data;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
973 ses.newkeys->trans.algo_crypt =
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
974 (struct dropbear_cipher*)s2c_cipher_algo->data;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
975 ses.newkeys->recv.crypt_mode =
502
43bbe17d6ba0 - Add Counter Mode support
Matt Johnston <matt@ucc.asn.au>
parents: 501
diff changeset
976 (struct dropbear_cipher_mode*)c2s_cipher_algo->mode;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
977 ses.newkeys->trans.crypt_mode =
502
43bbe17d6ba0 - Add Counter Mode support
Matt Johnston <matt@ucc.asn.au>
parents: 501
diff changeset
978 (struct dropbear_cipher_mode*)s2c_cipher_algo->mode;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
979 ses.newkeys->recv.algo_mac =
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
980 (struct dropbear_hash*)c2s_hash_algo->data;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
981 ses.newkeys->trans.algo_mac =
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
982 (struct dropbear_hash*)s2c_hash_algo->data;
534
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
983 ses.newkeys->recv.algo_comp = c2s_comp_algo->val;
0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
984 ses.newkeys->trans.algo_comp = s2c_comp_algo->val;
36
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
985 }
a600c015562d Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents: 35
diff changeset
986
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
987 /* reserved for future extensions */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
988 buf_getint(ses.payload);
739
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
989
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
990 if (ses.send_kex_first_guess && allgood) {
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
991 TRACE(("our_first_follows_matches 1"))
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
992 ses.kexstate.our_first_follows_matches = 1;
d44325108d0e first_kex_packet_follows working, needs tidying
Matt Johnston <matt@ucc.asn.au>
parents: 712
diff changeset
993 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
994 return;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
995
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
996 error:
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 575
diff changeset
997 dropbear_exit("No matching algo %s", erralgo);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 22
diff changeset
998 }