Mercurial > dropbear
annotate common-kex.c @ 41:18eccbfb9641
added window-size change handling
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sun, 01 Aug 2004 09:41:37 +0000 |
| parents | a600c015562d |
| children | e3adf4cf5465 |
| rev | line source |
|---|---|
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1 /* |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
2 * Dropbear - a SSH2 server |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
3 * SSH client implementation |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
4 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
5 * This code is copied from the larger file "kex.c" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
6 * some functions are verbatim, others are generalized --mihnea |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
7 * |
| 33 | 8 * Copyright (c) 2002-2004 Matt Johnston |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
9 * Portions Copyright (c) 2004 by Mihnea Stoenescu |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
10 * All rights reserved. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
11 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
12 * 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
|
13 * 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
|
14 * 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
|
15 * 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
|
16 * 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
|
17 * 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
|
18 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
19 * 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
|
20 * all copies or substantial portions of the Software. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
21 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
22 * 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
|
23 * 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
|
24 * 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
|
25 * 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
|
26 * 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
|
27 * 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
|
28 * SOFTWARE. */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
29 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
30 #include "includes.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
31 #include "dbutil.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
32 #include "algo.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
33 #include "buffer.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
34 #include "session.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
35 #include "kex.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
36 #include "ssh.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
37 #include "packet.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
38 #include "bignum.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
39 #include "random.h" |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
40 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
41 /* diffie-hellman-group1-sha1 value for p */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
42 const unsigned char dh_p_val[] = { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
43 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
|
44 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
|
45 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
|
46 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
|
47 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
|
48 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
|
49 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
|
50 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
|
51 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
|
52 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
|
53 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
54 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
55 const int DH_G_VAL = 2; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
56 |
| 33 | 57 static void kexinitialise(); |
|
35
0ad5fb979f42
set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents:
34
diff
changeset
|
58 void gen_new_keys(); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
59 #ifndef DISABLE_ZLIB |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
60 static void gen_new_zstreams(); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
61 #endif |
| 33 | 62 static void read_kex_algos(); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
63 /* helper function for gen_new_keys */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
64 static void hashkeys(unsigned char *out, int outlen, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
65 const hash_state * hs, unsigned const char X); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
66 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
67 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
68 /* Send our list of algorithms we can use */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
69 void send_msg_kexinit() { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
70 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
71 CHECKCLEARTOWRITE(); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
72 buf_putbyte(ses.writepayload, SSH_MSG_KEXINIT); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
73 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
74 /* cookie */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
75 genrandom(buf_getwriteptr(ses.writepayload, 16), 16); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
76 buf_incrwritepos(ses.writepayload, 16); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
77 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
78 /* kex algos */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
79 buf_put_algolist(ses.writepayload, sshkex); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
80 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
81 /* server_host_key_algorithms */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
82 buf_put_algolist(ses.writepayload, sshhostkey); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
83 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
84 /* encryption_algorithms_client_to_server */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
85 buf_put_algolist(ses.writepayload, sshciphers); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
86 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
87 /* encryption_algorithms_server_to_client */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
88 buf_put_algolist(ses.writepayload, sshciphers); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
89 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
90 /* mac_algorithms_client_to_server */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
91 buf_put_algolist(ses.writepayload, sshhashes); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
92 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
93 /* mac_algorithms_server_to_client */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
94 buf_put_algolist(ses.writepayload, sshhashes); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
95 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
96 /* compression_algorithms_client_to_server */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
97 buf_put_algolist(ses.writepayload, sshcompress); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
98 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
99 /* compression_algorithms_server_to_client */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
100 buf_put_algolist(ses.writepayload, sshcompress); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
101 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
102 /* languages_client_to_server */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
103 buf_putstring(ses.writepayload, "", 0); |
|
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 /* languages_server_to_client */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
106 buf_putstring(ses.writepayload, "", 0); |
|
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 /* first_kex_packet_follows - unimplemented for now */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
109 buf_putbyte(ses.writepayload, 0x00); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
110 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
111 /* reserved unit32 */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
112 buf_putint(ses.writepayload, 0); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
113 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
114 /* set up transmitted kex packet buffer for hashing. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
115 * 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
|
116 ses.transkexinit = buf_newcopy(ses.writepayload); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
117 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
118 encrypt_packet(); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
119 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
|
120 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
121 TRACE(("DATAALLOWED=0")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
122 TRACE(("-> KEXINIT")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
123 ses.kexstate.sentkexinit = 1; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
124 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
125 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
126 /* *** NOTE regarding (send|recv)_msg_newkeys *** |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
127 * Changed by mihnea from the original kex.c to set dataallowed after a |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
128 * completed key exchange, no matter the order in which it was performed. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
129 * This enables client mode without affecting server functionality. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
130 */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
131 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
132 /* 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
|
133 void send_msg_newkeys() { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
134 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
135 TRACE(("enter send_msg_newkeys")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
136 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
137 /* generate the kexinit request */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
138 CHECKCLEARTOWRITE(); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
139 buf_putbyte(ses.writepayload, SSH_MSG_NEWKEYS); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
140 encrypt_packet(); |
|
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 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
143 /* set up our state */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
144 if (ses.kexstate.recvnewkeys) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
145 TRACE(("while RECVNEWKEYS=1")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
146 gen_new_keys(); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
147 kexinitialise(); /* we've finished with this kex */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
148 TRACE((" -> DATAALLOWED=1")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
149 ses.dataallowed = 1; /* we can send other packets again now */ |
| 33 | 150 ses.kexstate.donefirstkex = 1; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
151 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
152 ses.kexstate.sentnewkeys = 1; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
153 TRACE(("SENTNEWKEYS=1")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
154 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
155 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
156 TRACE(("-> MSG_NEWKEYS")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
157 TRACE(("leave send_msg_newkeys")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
158 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
159 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
160 /* 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
|
161 void recv_msg_newkeys() { |
|
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 TRACE(("<- MSG_NEWKEYS")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
164 TRACE(("enter recv_msg_newkeys")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
165 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
166 /* simply check if we've sent SSH_MSG_NEWKEYS, and if so, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
167 * switch to the new keys */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
168 if (ses.kexstate.sentnewkeys) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
169 TRACE(("while SENTNEWKEYS=1")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
170 gen_new_keys(); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
171 kexinitialise(); /* we've finished with this kex */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
172 TRACE((" -> DATAALLOWED=1")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
173 ses.dataallowed = 1; /* we can send other packets again now */ |
| 33 | 174 ses.kexstate.donefirstkex = 1; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
175 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
176 TRACE(("RECVNEWKEYS=1")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
177 ses.kexstate.recvnewkeys = 1; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
178 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
179 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
180 TRACE(("leave recv_msg_newkeys")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
181 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
182 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
183 |
| 33 | 184 /* Set up the kex for the first time */ |
| 185 void kexfirstinitialise() { | |
| 186 | |
| 187 ses.kexstate.donefirstkex = 0; | |
| 188 kexinitialise(); | |
| 189 } | |
| 190 | |
| 191 /* Reset the kex state, ready for a new negotiation */ | |
| 192 static void kexinitialise() { | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
193 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
194 struct timeval tv; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
195 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
196 TRACE(("kexinitialise()")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
197 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
198 /* sent/recv'd MSG_KEXINIT */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
199 ses.kexstate.sentkexinit = 0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
200 ses.kexstate.recvkexinit = 0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
201 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
202 /* sent/recv'd MSG_NEWKEYS */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
203 ses.kexstate.recvnewkeys = 0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
204 ses.kexstate.sentnewkeys = 0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
205 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
206 /* first_packet_follows */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
207 ses.kexstate.firstfollows = 0; |
|
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 ses.kexstate.datatrans = 0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
210 ses.kexstate.datarecv = 0; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
211 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
212 if (gettimeofday(&tv, 0) < 0) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
213 dropbear_exit("Error getting time"); |
|
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 ses.kexstate.lastkextime = tv.tv_sec; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
216 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
217 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
218 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
219 /* 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
|
220 * 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
|
221 * 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
|
222 * 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
|
223 * The output will only be expanded once, since that is all that is required |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
224 * (for 3DES and SHA, with 24 and 20 bytes respectively). |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
225 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
226 * See Section 5.2 of the IETF secsh Transport Draft for details */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
227 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
228 /* Duplicated verbatim from kex.c --mihnea */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
229 static void hashkeys(unsigned char *out, int outlen, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
230 const hash_state * hs, const unsigned char X) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
231 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
232 hash_state hs2; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
233 unsigned char k2[SHA1_HASH_SIZE]; /* used to extending */ |
|
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 memcpy(&hs2, hs, sizeof(hash_state)); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
236 sha1_process(&hs2, &X, 1); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
237 sha1_process(&hs2, ses.session_id, SHA1_HASH_SIZE); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
238 sha1_done(&hs2, out); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
239 if (SHA1_HASH_SIZE < outlen) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
240 /* need to extend */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
241 memcpy(&hs2, hs, sizeof(hash_state)); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
242 sha1_process(&hs2, out, SHA1_HASH_SIZE); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
243 sha1_done(&hs2, k2); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
244 memcpy(&out[SHA1_HASH_SIZE], k2, outlen - SHA1_HASH_SIZE); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
245 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
246 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
247 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
248 /* Generate the actual encryption/integrity keys, using the results of the |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
249 * key exchange, as specified in section 5.2 of the IETF secsh-transport |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
250 * draft. This occurs after the DH key-exchange. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
251 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
252 * 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
|
253 * 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
|
254 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
255 /* Originally from kex.c, generalized for cli/svr mode --mihnea */ |
|
35
0ad5fb979f42
set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents:
34
diff
changeset
|
256 void gen_new_keys() { |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
257 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
258 unsigned char C2S_IV[MAX_IV_LEN]; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
259 unsigned char C2S_key[MAX_KEY_LEN]; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
260 unsigned char S2C_IV[MAX_IV_LEN]; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
261 unsigned char S2C_key[MAX_KEY_LEN]; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
262 /* unsigned char key[MAX_KEY_LEN]; */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
263 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
|
264 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
265 hash_state hs; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
266 unsigned int C2S_keysize, S2C_keysize; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
267 char mactransletter, macrecvletter; /* Client or server specific */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
268 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
269 TRACE(("enter gen_new_keys")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
270 /* 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
|
271 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
272 sha1_init(&hs); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
273 sha1_process_mp(&hs, ses.dh_K); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
274 mp_clear(ses.dh_K); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
275 m_free(ses.dh_K); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
276 sha1_process(&hs, ses.hash, SHA1_HASH_SIZE); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
277 m_burn(ses.hash, SHA1_HASH_SIZE); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
278 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
279 if (IS_DROPBEAR_CLIENT) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
280 trans_IV = C2S_IV; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
281 recv_IV = S2C_IV; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
282 trans_key = C2S_key; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
283 recv_key = S2C_key; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
284 C2S_keysize = ses.newkeys->trans_algo_crypt->keysize; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
285 S2C_keysize = ses.newkeys->recv_algo_crypt->keysize; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
286 mactransletter = 'E'; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
287 macrecvletter = 'F'; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
288 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
289 trans_IV = S2C_IV; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
290 recv_IV = C2S_IV; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
291 trans_key = S2C_key; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
292 recv_key = C2S_key; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
293 C2S_keysize = ses.newkeys->recv_algo_crypt->keysize; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
294 S2C_keysize = ses.newkeys->trans_algo_crypt->keysize; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
295 mactransletter = 'F'; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
296 macrecvletter = 'E'; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
297 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
298 |
|
35
0ad5fb979f42
set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents:
34
diff
changeset
|
299 hashkeys(C2S_IV, SHA1_HASH_SIZE, &hs, 'A'); |
|
0ad5fb979f42
set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents:
34
diff
changeset
|
300 hashkeys(S2C_IV, SHA1_HASH_SIZE, &hs, 'B'); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
301 hashkeys(C2S_key, C2S_keysize, &hs, 'C'); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
302 hashkeys(S2C_key, S2C_keysize, &hs, 'D'); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
303 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
304 if (cbc_start( |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
305 find_cipher(ses.newkeys->recv_algo_crypt->cipherdesc->name), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
306 recv_IV, recv_key, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
307 ses.newkeys->recv_algo_crypt->keysize, 0, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
308 &ses.newkeys->recv_symmetric_struct) != CRYPT_OK) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
309 dropbear_exit("crypto error"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
310 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
311 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
312 if (cbc_start( |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
313 find_cipher(ses.newkeys->trans_algo_crypt->cipherdesc->name), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
314 trans_IV, trans_key, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
315 ses.newkeys->trans_algo_crypt->keysize, 0, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
316 &ses.newkeys->trans_symmetric_struct) != CRYPT_OK) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
317 dropbear_exit("crypto error"); |
|
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 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
320 /* MAC keys */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
321 hashkeys(ses.newkeys->transmackey, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
322 ses.newkeys->trans_algo_mac->keysize, &hs, mactransletter); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
323 hashkeys(ses.newkeys->recvmackey, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
324 ses.newkeys->recv_algo_mac->keysize, &hs, macrecvletter); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
325 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
326 #ifndef DISABLE_ZLIB |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
327 gen_new_zstreams(); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
328 #endif |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
329 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
330 /* Switch over to the new keys */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
331 m_burn(ses.keys, sizeof(struct key_context)); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
332 m_free(ses.keys); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
333 ses.keys = ses.newkeys; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
334 ses.newkeys = NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
335 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
336 TRACE(("leave gen_new_keys")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
337 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
338 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
339 #ifndef DISABLE_ZLIB |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
340 /* 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
|
341 * called from gen_new_keys() */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
342 static void gen_new_zstreams() { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
343 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
344 /* create new zstreams */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
345 if (ses.newkeys->recv_algo_comp == DROPBEAR_COMP_ZLIB) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
346 ses.newkeys->recv_zstream = (z_streamp)m_malloc(sizeof(z_stream)); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
347 ses.newkeys->recv_zstream->zalloc = Z_NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
348 ses.newkeys->recv_zstream->zfree = Z_NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
349 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
350 if (inflateInit(ses.newkeys->recv_zstream) != Z_OK) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
351 dropbear_exit("zlib error"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
352 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
353 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
354 ses.newkeys->recv_zstream = NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
355 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
356 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
357 if (ses.newkeys->trans_algo_comp == DROPBEAR_COMP_ZLIB) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
358 ses.newkeys->trans_zstream = (z_streamp)m_malloc(sizeof(z_stream)); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
359 ses.newkeys->trans_zstream->zalloc = Z_NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
360 ses.newkeys->trans_zstream->zfree = Z_NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
361 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
362 if (deflateInit(ses.newkeys->trans_zstream, Z_DEFAULT_COMPRESSION) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
363 != Z_OK) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
364 dropbear_exit("zlib error"); |
|
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 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
367 ses.newkeys->trans_zstream = NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
368 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
369 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
370 /* clean up old keys */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
371 if (ses.keys->recv_zstream != NULL) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
372 if (inflateEnd(ses.keys->recv_zstream) == Z_STREAM_ERROR) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
373 /* Z_DATA_ERROR is ok, just means that stream isn't ended */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
374 dropbear_exit("crypto error"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
375 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
376 m_free(ses.keys->recv_zstream); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
377 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
378 if (ses.keys->trans_zstream != NULL) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
379 if (deflateEnd(ses.keys->trans_zstream) == Z_STREAM_ERROR) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
380 /* Z_DATA_ERROR is ok, just means that stream isn't ended */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
381 dropbear_exit("crypto error"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
382 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
383 m_free(ses.keys->trans_zstream); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
384 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
385 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
386 #endif |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
387 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
388 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
389 /* 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
|
390 * 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
|
391 * 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
|
392 * 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
|
393 * 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
|
394 * initiate the diffie-hellman key exchange */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
395 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
396 /* Originally from kex.c, generalized for cli/svr mode --mihnea */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
397 /* Belongs in common_kex.c where it should be moved after review */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
398 void recv_msg_kexinit() { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
399 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
400 TRACE(("<- KEXINIT")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
401 TRACE(("enter recv_msg_kexinit")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
402 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
403 /* start the kex hash */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
404 ses.kexhashbuf = buf_new(MAX_KEXHASHBUF); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
405 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
406 if (!ses.kexstate.sentkexinit) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
407 /* we need to send a kex packet */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
408 send_msg_kexinit(); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
409 TRACE(("continue recv_msg_kexinit: sent kexinit")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
410 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
411 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
412 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
413 if (IS_DROPBEAR_CLIENT) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
414 |
| 26 | 415 /* read the peer's choice of algos */ |
| 33 | 416 read_kex_algos(); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
417 |
| 26 | 418 /* V_C, the client's version string (CR and NL excluded) */ |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
419 buf_putstring(ses.kexhashbuf, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
420 (unsigned char*)LOCAL_IDENT, strlen(LOCAL_IDENT)); |
| 26 | 421 /* V_S, the server's version string (CR and NL excluded) */ |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
422 buf_putstring(ses.kexhashbuf, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
423 ses.remoteident, strlen((char*)ses.remoteident)); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
424 |
| 26 | 425 /* 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
|
426 buf_putstring(ses.kexhashbuf, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
427 buf_getptr(ses.transkexinit, ses.transkexinit->len), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
428 ses.transkexinit->len); |
| 26 | 429 /* 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
|
430 buf_setpos(ses.payload, 0); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
431 buf_putstring(ses.kexhashbuf, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
432 buf_getptr(ses.payload, ses.payload->len), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
433 ses.payload->len); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
434 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
435 } else { |
| 26 | 436 /* SERVER */ |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
437 |
| 26 | 438 /* read the peer's choice of algos */ |
| 33 | 439 read_kex_algos(); |
| 26 | 440 /* V_C, the client's version string (CR and NL excluded) */ |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
441 buf_putstring(ses.kexhashbuf, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
442 ses.remoteident, strlen((char*)ses.remoteident)); |
| 26 | 443 /* V_S, the server's version string (CR and NL excluded) */ |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
444 buf_putstring(ses.kexhashbuf, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
445 (unsigned char*)LOCAL_IDENT, strlen(LOCAL_IDENT)); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
446 |
| 26 | 447 /* 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
|
448 buf_setpos(ses.payload, 0); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
449 buf_putstring(ses.kexhashbuf, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
450 buf_getptr(ses.payload, ses.payload->len), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
451 ses.payload->len); |
| 26 | 452 /* 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
|
453 buf_putstring(ses.kexhashbuf, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
454 buf_getptr(ses.transkexinit, ses.transkexinit->len), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
455 ses.transkexinit->len); |
| 26 | 456 ses.requirenext = SSH_MSG_KEXDH_INIT; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
457 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
458 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
459 buf_free(ses.transkexinit); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
460 ses.transkexinit = NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
461 /* 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
|
462 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
463 ses.kexstate.recvkexinit = 1; |
|
22
c1e5d9195402
merge of abac2150ee4f4031a98016241fbd136d24fed127
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
464 // ses.expecting = 0; // client matt |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
465 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
466 TRACE(("leave recv_msg_kexinit")); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
467 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
468 |
| 26 | 469 /* Initialises and generate one side of the diffie-hellman key exchange values. |
| 470 * See the ietf-secsh-transport draft, section 6, for details */ | |
| 471 void gen_kexdh_vals(mp_int *dh_pub, mp_int *dh_priv) { | |
| 472 | |
| 473 mp_int dh_p, dh_q, dh_g; | |
| 474 unsigned char randbuf[DH_P_LEN]; | |
| 475 int dh_q_len; | |
| 476 | |
| 477 TRACE(("enter send_msg_kexdh_reply")); | |
| 478 | |
| 479 m_mp_init_multi(&dh_g, &dh_p, &dh_q, dh_priv, dh_pub, NULL); | |
| 480 | |
| 481 /* read the prime and generator*/ | |
| 482 if (mp_read_unsigned_bin(&dh_p, (unsigned char*)dh_p_val, DH_P_LEN) | |
| 483 != MP_OKAY) { | |
| 484 dropbear_exit("Diffie-Hellman error"); | |
| 485 } | |
| 486 | |
| 487 if (mp_set_int(&dh_g, DH_G_VAL) != MP_OKAY) { | |
| 488 dropbear_exit("Diffie-Hellman error"); | |
| 489 } | |
| 490 | |
| 491 /* calculate q = (p-1)/2 */ | |
| 492 /* dh_priv is just a temp var here */ | |
| 493 if (mp_sub_d(&dh_p, 1, dh_priv) != MP_OKAY) { | |
| 494 dropbear_exit("Diffie-Hellman error"); | |
| 495 } | |
| 496 if (mp_div_2(dh_priv, &dh_q) != MP_OKAY) { | |
| 497 dropbear_exit("Diffie-Hellman error"); | |
| 498 } | |
| 499 | |
| 500 dh_q_len = mp_unsigned_bin_size(&dh_q); | |
| 501 | |
| 502 /* calculate our random value dh_y */ | |
| 503 do { | |
| 504 assert((unsigned int)dh_q_len <= sizeof(randbuf)); | |
| 505 genrandom(randbuf, dh_q_len); | |
| 506 if (mp_read_unsigned_bin(dh_priv, randbuf, dh_q_len) != MP_OKAY) { | |
| 507 dropbear_exit("Diffie-Hellman error"); | |
| 508 } | |
| 509 } while (mp_cmp(dh_priv, &dh_q) == MP_GT || mp_cmp_d(dh_priv, 0) != MP_GT); | |
| 510 | |
| 511 /* f = g^y mod p */ | |
| 512 if (mp_exptmod(&dh_g, dh_priv, &dh_p, dh_pub) != MP_OKAY) { | |
| 513 dropbear_exit("Diffie-Hellman error"); | |
| 514 } | |
| 515 mp_clear_multi(&dh_g, &dh_p, &dh_q, NULL); | |
| 516 } | |
| 517 | |
| 518 /* This function is fairly common between client/server, with some substitution | |
| 519 * of dh_e/dh_f etc. Hence these arguments: | |
| 520 * dh_pub_us is 'e' for the client, 'f' for the server. dh_pub_them is | |
| 521 * vice-versa. dh_priv is the x/y value corresponding to dh_pub_us */ | |
| 522 void kexdh_comb_key(mp_int *dh_pub_us, mp_int *dh_priv, mp_int *dh_pub_them, | |
| 523 sign_key *hostkey) { | |
| 524 | |
| 525 mp_int dh_p; | |
| 526 mp_int *dh_e = NULL, *dh_f = NULL; | |
| 527 hash_state hs; | |
| 528 | |
| 529 /* read the prime and generator*/ | |
| 530 mp_init(&dh_p); | |
| 531 if (mp_read_unsigned_bin(&dh_p, (unsigned char*)dh_p_val, DH_P_LEN) | |
| 532 != MP_OKAY) { | |
| 533 dropbear_exit("Diffie-Hellman error"); | |
| 534 } | |
| 535 | |
| 536 /* Check that dh_pub_them (dh_e or dh_f) is in the range [1, p-1] */ | |
| 537 if (mp_cmp(dh_pub_them, &dh_p) != MP_LT | |
| 538 || mp_cmp_d(dh_pub_them, 0) != MP_GT) { | |
| 539 dropbear_exit("Diffie-Hellman error"); | |
| 540 } | |
| 541 | |
| 542 /* K = e^y mod p = f^x mod p */ | |
| 543 ses.dh_K = (mp_int*)m_malloc(sizeof(mp_int)); | |
| 544 m_mp_init(ses.dh_K); | |
| 545 if (mp_exptmod(dh_pub_them, dh_priv, &dh_p, ses.dh_K) != MP_OKAY) { | |
| 546 dropbear_exit("Diffie-Hellman error"); | |
| 547 } | |
| 548 | |
| 549 /* clear no longer needed vars */ | |
| 550 mp_clear_multi(&dh_p, NULL); | |
| 551 | |
| 552 /* From here on, the code needs to work with the _same_ vars on each side, | |
| 553 * not vice-versaing for client/server */ | |
| 554 if (IS_DROPBEAR_CLIENT) { | |
| 555 dh_e = dh_pub_us; | |
| 556 dh_f = dh_pub_them; | |
| 557 } else { | |
| 558 dh_e = dh_pub_them; | |
| 559 dh_f = dh_pub_us; | |
| 560 } | |
| 561 | |
| 562 /* Create the remainder of the hash buffer, to generate the exchange hash */ | |
| 563 /* K_S, the host key */ | |
| 564 buf_put_pub_key(ses.kexhashbuf, hostkey, ses.newkeys->algo_hostkey); | |
| 565 /* e, exchange value sent by the client */ | |
| 566 buf_putmpint(ses.kexhashbuf, dh_e); | |
| 567 /* f, exchange value sent by the server */ | |
| 568 buf_putmpint(ses.kexhashbuf, dh_f); | |
| 569 /* K, the shared secret */ | |
| 570 buf_putmpint(ses.kexhashbuf, ses.dh_K); | |
| 571 | |
| 572 /* calculate the hash H to sign */ | |
| 573 sha1_init(&hs); | |
| 574 buf_setpos(ses.kexhashbuf, 0); | |
| 575 sha1_process(&hs, buf_getptr(ses.kexhashbuf, ses.kexhashbuf->len), | |
| 576 ses.kexhashbuf->len); | |
| 577 sha1_done(&hs, ses.hash); | |
|
35
0ad5fb979f42
set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents:
34
diff
changeset
|
578 |
|
0ad5fb979f42
set the isserver flag (oops)
Matt Johnston <matt@ucc.asn.au>
parents:
34
diff
changeset
|
579 buf_burn(ses.kexhashbuf); |
| 26 | 580 buf_free(ses.kexhashbuf); |
| 581 ses.kexhashbuf = NULL; | |
| 582 | |
| 583 /* first time around, we set the session_id to H */ | |
| 584 if (ses.session_id == NULL) { | |
| 585 /* create the session_id, this never needs freeing */ | |
| 586 ses.session_id = (unsigned char*)m_malloc(SHA1_HASH_SIZE); | |
| 587 memcpy(ses.session_id, ses.hash, SHA1_HASH_SIZE); | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 /* read the other side's algo list. buf_match_algo is a callback to match | |
| 592 * algos for the client or server. */ | |
| 33 | 593 static void read_kex_algos() { |
| 26 | 594 |
|
36
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
595 /* for asymmetry */ |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
596 algo_type * c2s_hash_algo = NULL; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
597 algo_type * s2c_hash_algo = NULL; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
598 algo_type * c2s_cipher_algo = NULL; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
599 algo_type * s2c_cipher_algo = NULL; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
600 algo_type * c2s_comp_algo = NULL; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
601 algo_type * s2c_comp_algo = NULL; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
602 /* the generic one */ |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
603 algo_type * algo = NULL; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
604 |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
605 /* which algo couldn't match */ |
| 26 | 606 char * erralgo = NULL; |
| 607 | |
| 608 int goodguess = 0; | |
| 609 int allgood = 1; /* we AND this with each goodguess and see if its still | |
| 610 true after */ | |
| 611 | |
| 612 buf_incrpos(ses.payload, 16); /* start after the cookie */ | |
| 613 | |
| 614 ses.newkeys = (struct key_context*)m_malloc(sizeof(struct key_context)); | |
| 615 | |
| 616 /* kex_algorithms */ | |
| 33 | 617 algo = ses.buf_match_algo(ses.payload, sshkex, &goodguess); |
| 26 | 618 allgood &= goodguess; |
| 619 if (algo == NULL) { | |
| 620 erralgo = "kex"; | |
| 621 goto error; | |
| 622 } | |
|
34
e2a1eaa19f22
Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
623 TRACE(("kex algo %s", algo->name)); |
| 26 | 624 ses.newkeys->algo_kex = algo->val; |
| 625 | |
| 626 /* server_host_key_algorithms */ | |
| 33 | 627 algo = ses.buf_match_algo(ses.payload, sshhostkey, &goodguess); |
| 26 | 628 allgood &= goodguess; |
| 629 if (algo == NULL) { | |
| 630 erralgo = "hostkey"; | |
| 631 goto error; | |
| 632 } | |
|
34
e2a1eaa19f22
Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
633 TRACE(("hostkey algo %s", algo->name)); |
| 26 | 634 ses.newkeys->algo_hostkey = algo->val; |
| 635 | |
| 636 /* encryption_algorithms_client_to_server */ | |
|
36
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
637 c2s_cipher_algo = ses.buf_match_algo(ses.payload, sshciphers, &goodguess); |
| 26 | 638 if (algo == NULL) { |
| 639 erralgo = "enc c->s"; | |
| 640 goto error; | |
| 641 } | |
| 642 | |
| 643 /* encryption_algorithms_server_to_client */ | |
|
36
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
644 s2c_cipher_algo = ses.buf_match_algo(ses.payload, sshciphers, &goodguess); |
| 26 | 645 if (algo == NULL) { |
| 646 erralgo = "enc s->c"; | |
| 647 goto error; | |
| 648 } | |
| 649 | |
| 650 /* mac_algorithms_client_to_server */ | |
|
36
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
651 c2s_hash_algo = ses.buf_match_algo(ses.payload, sshhashes, &goodguess); |
| 26 | 652 if (algo == NULL) { |
| 653 erralgo = "mac c->s"; | |
| 654 goto error; | |
| 655 } | |
| 656 | |
| 657 /* mac_algorithms_server_to_client */ | |
|
36
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
658 s2c_hash_algo = ses.buf_match_algo(ses.payload, sshhashes, &goodguess); |
| 26 | 659 if (algo == NULL) { |
| 660 erralgo = "mac s->c"; | |
| 661 goto error; | |
| 662 } | |
| 663 | |
| 664 /* compression_algorithms_client_to_server */ | |
|
36
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
665 c2s_comp_algo = ses.buf_match_algo(ses.payload, sshcompress, &goodguess); |
| 26 | 666 if (algo == NULL) { |
| 667 erralgo = "comp c->s"; | |
| 668 goto error; | |
| 669 } | |
| 670 | |
| 671 /* compression_algorithms_server_to_client */ | |
|
36
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
672 s2c_comp_algo = ses.buf_match_algo(ses.payload, sshcompress, &goodguess); |
| 26 | 673 if (algo == NULL) { |
| 674 erralgo = "comp s->c"; | |
| 675 goto error; | |
| 676 } | |
| 677 | |
| 678 /* languages_client_to_server */ | |
| 679 buf_eatstring(ses.payload); | |
| 680 | |
| 681 /* languages_server_to_client */ | |
| 682 buf_eatstring(ses.payload); | |
| 683 | |
| 684 /* first_kex_packet_follows */ | |
| 685 if (buf_getbyte(ses.payload)) { | |
| 686 ses.kexstate.firstfollows = 1; | |
| 687 /* if the guess wasn't good, we ignore the packet sent */ | |
| 688 if (!allgood) { | |
| 689 ses.ignorenext = 1; | |
| 690 } | |
| 691 } | |
| 692 | |
|
36
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
693 /* Handle the asymmetry */ |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
694 if (IS_DROPBEAR_CLIENT) { |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
695 ses.newkeys->recv_algo_crypt = |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
696 (struct dropbear_cipher*)s2c_cipher_algo->data; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
697 ses.newkeys->trans_algo_crypt = |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
698 (struct dropbear_cipher*)c2s_cipher_algo->data; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
699 ses.newkeys->recv_algo_mac = |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
700 (struct dropbear_hash*)s2c_hash_algo->data; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
701 ses.newkeys->trans_algo_mac = |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
702 (struct dropbear_hash*)c2s_hash_algo->data; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
703 ses.newkeys->recv_algo_comp = s2c_comp_algo->val; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
704 ses.newkeys->trans_algo_comp = c2s_comp_algo->val; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
705 } else { |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
706 /* SERVER */ |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
707 ses.newkeys->recv_algo_crypt = |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
708 (struct dropbear_cipher*)c2s_cipher_algo->data; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
709 ses.newkeys->trans_algo_crypt = |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
710 (struct dropbear_cipher*)s2c_cipher_algo->data; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
711 ses.newkeys->recv_algo_mac = |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
712 (struct dropbear_hash*)c2s_hash_algo->data; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
713 ses.newkeys->trans_algo_mac = |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
714 (struct dropbear_hash*)s2c_hash_algo->data; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
715 ses.newkeys->recv_algo_comp = c2s_comp_algo->val; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
716 ses.newkeys->trans_algo_comp = s2c_comp_algo->val; |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
717 } |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
718 |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
719 TRACE(("enc algo recv %s", algo->name)); |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
720 TRACE(("enc algo trans %s", algo->name)); |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
721 TRACE(("mac algo recv %s", algo->name)); |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
722 TRACE(("mac algo trans %s", algo->name)); |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
723 TRACE(("comp algo recv %s", algo->name)); |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
724 TRACE(("comp algo trans %s", algo->name)); |
|
a600c015562d
Handle differing c2s and s2c algorithms properly
Matt Johnston <matt@ucc.asn.au>
parents:
35
diff
changeset
|
725 |
| 26 | 726 /* reserved for future extensions */ |
| 727 buf_getint(ses.payload); | |
| 728 return; | |
| 729 | |
| 730 error: | |
| 731 dropbear_exit("no matching algo %s", erralgo); | |
| 732 } |