dropbear: common-kex.c annotate

annotate common-kex.c @ 1060:4c733310c21d nocircbuffer

reword comment for clarity

author	Matt Johnston <matt@ucc.asn.au>
date	Sun, 01 Mar 2015 23:26:42 +0800
parents	4d7b4c5526c5
children	c45d65392c1a

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 */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 buf_putstring(ses.writepayload, "", 0);
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 */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 buf_putstring(ses.writepayload, "", 0);
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 <= 2SHA1_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);
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	514 remote_ident_len = strlen((char*)ses.remoteident);
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) */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	528 buf_putstring(ses.kexhashbuf,
257 63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	529 (unsigned char*)LOCAL_IDENT, local_ident_len);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	530 /* V_S, the server's version string (CR and NL excluded) */
257 63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	531 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	532
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	533 /* 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	534 buf_putstring(ses.kexhashbuf,
257 63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	535 ses.transkexinit->data, ses.transkexinit->len);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	536 /* 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	537 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	538 buf_putstring(ses.kexhashbuf,
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled Matt Johnston <matt@ucc.asn.au> parents: 1013 diff changeset	539 buf_getptr(ses.payload, ses.payload->len-ses.payload->pos),
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled Matt Johnston <matt@ucc.asn.au> parents: 1013 diff changeset	540 ses.payload->len-ses.payload->pos);
886 cbc73a5aefb0 requirenext doesn't need two values Matt Johnston <matt@ucc.asn.au> parents: 885 diff changeset	541 ses.requirenext = SSH_MSG_KEXDH_REPLY;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	542 } else {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	543 /* SERVER */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	544
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	545 /* read the peer's choice of algos */
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	546 read_kex_algos();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	547 /* V_C, the client's version string (CR and NL excluded) */
257 63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	548 buf_putstring(ses.kexhashbuf, ses.remoteident, remote_ident_len);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	549 /* V_S, the server's version string (CR and NL excluded) */
257 63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	550 buf_putstring(ses.kexhashbuf,
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	551 (unsigned char*)LOCAL_IDENT, local_ident_len);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	552
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	553 /* 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	554 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	555 buf_putstring(ses.kexhashbuf,
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled Matt Johnston <matt@ucc.asn.au> parents: 1013 diff changeset	556 buf_getptr(ses.payload, ses.payload->len-ses.payload->pos),
4d7b4c5526c5 A bit of a bodge to avoid memcpy if zlib is disabled Matt Johnston <matt@ucc.asn.au> parents: 1013 diff changeset	557 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	558
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	559 /* 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	560 buf_putstring(ses.kexhashbuf,
257 63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	561 ses.transkexinit->data, ses.transkexinit->len);
63601217f5ab * options.h, common-kex.c: fix support of 4096 byte host keys Matt Johnston <matt@ucc.asn.au> parents: 228 diff changeset	562
886 cbc73a5aefb0 requirenext doesn't need two values Matt Johnston <matt@ucc.asn.au> parents: 885 diff changeset	563 ses.requirenext = SSH_MSG_KEXDH_INIT;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	564 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	565
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	566 buf_free(ses.transkexinit);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	567 ses.transkexinit = NULL;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	568 /* 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	569
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	570 ses.kexstate.recvkexinit = 1;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	571
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	572 TRACE(("leave recv_msg_kexinit"))
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	573 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	574
595 2895626d864f Add diffie-hellman-group14-sha1 KEX method Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	575 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	576 {
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	577 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	578 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	579 }
2895626d864f Add diffie-hellman-group14-sha1 KEX method Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	580
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	581 /* 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	582 * 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	583 /* 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	584 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	585 struct kex_dh_param *param = NULL;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	586
84 29a5c7c62350 default initialisers for mp_ints Matt Johnston <matt@ucc.asn.au> parents: 79 diff changeset	587 DEF_MP_INT(dh_p);
29a5c7c62350 default initialisers for mp_ints Matt Johnston <matt@ucc.asn.au> parents: 79 diff changeset	588 DEF_MP_INT(dh_q);
29a5c7c62350 default initialisers for mp_ints Matt Johnston <matt@ucc.asn.au> parents: 79 diff changeset	589 DEF_MP_INT(dh_g);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	590
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	591 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	592
855 04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	593 param = m_malloc(sizeof(*param));
852 7540c0822374 Various cleanups and fixes for warnings Matt Johnston <matt@ucc.asn.au> parents: 848 diff changeset	594 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	595
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	596 /* read the prime and generator*/
595 2895626d864f Add diffie-hellman-group14-sha1 KEX method Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	597 load_dh_p(&dh_p);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	598
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	599 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	600 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	601 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	602
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	603 /* calculate q = (p-1)/2 */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	604 /* 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	605 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	606 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	607 }
755 b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	608 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	609 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	610 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	611
188 c9483550701b - refactored random mp_int generation and byte->mp_int code Matt Johnston <matt@ucc.asn.au> parents: 179 diff changeset	612 /* 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	613 gen_random_mpint(&dh_q, &param->priv);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	614
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	615 /* 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	616 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	617 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	618 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	619 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	620 return param;
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	621 }
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 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	624 {
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	625 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	626 m_free(param);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	627 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	628
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	629 /* 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	630 * of dh_e/dh_f etc. Hence these arguments:
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	631 * 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	632 * 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	633 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	634 sign_key *hostkey) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	635
1013 a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are Matt Johnston <matt@ucc.asn.au> parents: 996 diff changeset	636 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	637 DEF_MP_INT(dh_p_min1);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	638 mp_int dh_e = NULL, dh_f = NULL;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	639
1013 a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are Matt Johnston <matt@ucc.asn.au> parents: 996 diff changeset	640 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	641 load_dh_p(&dh_p);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	642
1013 a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are Matt Johnston <matt@ucc.asn.au> parents: 996 diff changeset	643 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	644 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	645 }
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are Matt Johnston <matt@ucc.asn.au> parents: 996 diff changeset	646
a1e79ffa5862 Tighten validation of DH values. Odds of x==0 being generated are Matt Johnston <matt@ucc.asn.au> parents: 996 diff changeset	647 /* 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	648 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	649 \|\| mp_cmp_d(dh_pub_them, 1) != MP_GT) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	650 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	651 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	652
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	653 /* 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	654 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	655 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	656 dropbear_exit("Diffie-Hellman error");
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	657 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	658
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	659 /* 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	660 mp_clear_multi(&dh_p, &dh_p_min1, NULL);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	661
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	662 /* 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	663 * not vice-versaing for client/server */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	664 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	665 dh_e = &param->pub;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	666 dh_f = dh_pub_them;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	667 } else {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	668 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	669 dh_f = &param->pub;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	670 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	671
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	672 /* 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	673 /* K_S, the host key */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	674 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	675 /* e, exchange value sent by the client */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	676 buf_putmpint(ses.kexhashbuf, dh_e);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	677 /* f, exchange value sent by the server */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	678 buf_putmpint(ses.kexhashbuf, dh_f);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	679 /* K, the shared secret */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	680 buf_putmpint(ses.kexhashbuf, ses.dh_K);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	681
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	682 /* 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	683 finish_kexhashbuf();
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	684 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	685
755 b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	686 #ifdef DROPBEAR_ECDH
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	687 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	688 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	689 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	690 &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	691 dropbear_exit("ECC error");
756 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 return param;
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	694 }
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	695
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	696 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	697 ecc_free(&param->key);
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	698 m_free(param);
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	699
755 b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	700 }
b07eb3dc23ec refactor kexdh code a bit, start working on ecdh etc Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	701 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	702 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	703 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	704 /* public keys from client and server */
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	705 ecc_key Q_C, Q_S, *Q_them;
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	706
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	707 Q_them = buf_get_ecc_raw_pubkey(pub_them, algo_kex->ecc_curve);
757 230666086711 ecc key import function Matt Johnston <matt@ucc.asn.au> parents: 756 diff changeset	708
761 ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 759 diff changeset	709 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	710
848 6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	711 /* Create the remainder of the hash buffer, to generate the exchange hash
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	712 See RFC5656 section 4 page 7 */
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	713 if (IS_DROPBEAR_CLIENT) {
761 ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 759 diff changeset	714 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	715 Q_S = Q_them;
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	716 } 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	717 Q_C = Q_them;
761 ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 759 diff changeset	718 Q_S = &param->key;
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	719 }
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 /* K_S, the host key */
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	722 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	723 /* 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	724 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	725 /* 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	726 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	727 /* K, the shared secret */
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	728 buf_putmpint(ses.kexhashbuf, ses.dh_K);
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	729
bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	730 /* 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	731 finish_kexhashbuf();
ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 759 diff changeset	732 }
848 6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	733 #endif /* DROPBEAR_ECDH */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	734
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	735 #ifdef DROPBEAR_CURVE25519
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	736 struct kex_curve25519_param *gen_kexcurve25519_param () {
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	737 /* Per http://cr.yp.to/ecdh.html */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	738 struct kex_curve25519_param param = m_malloc(sizeof(param));
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	739 const unsigned char basepoint[32] = {9};
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	740
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	741 genrandom(param->priv, CURVE25519_LEN);
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	742 param->priv[0] &= 248;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	743 param->priv[31] &= 127;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	744 param->priv[31] \|= 64;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	745
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	746 curve25519_donna(param->pub, param->priv, basepoint);
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	747
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	748 return param;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	749 }
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 void free_kexcurve25519_param(struct kex_curve25519_param *param)
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	752 {
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	753 m_burn(param->priv, CURVE25519_LEN);
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	754 m_free(param);
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	755 }
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 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	758 sign_key *hostkey) {
852 7540c0822374 Various cleanups and fixes for warnings Matt Johnston <matt@ucc.asn.au> parents: 848 diff changeset	759 unsigned char out[CURVE25519_LEN];
848 6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	760 const unsigned char* Q_C = NULL;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	761 const unsigned char* Q_S = NULL;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	762
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	763 if (buf_pub_them->len != CURVE25519_LEN)
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 dropbear_exit("Bad curve25519");
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
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	768 curve25519_donna(out, param->priv, buf_pub_them->data);
852 7540c0822374 Various cleanups and fixes for warnings Matt Johnston <matt@ucc.asn.au> parents: 848 diff changeset	769 m_mp_alloc_init_multi(&ses.dh_K, NULL);
848 6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	770 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	771 m_burn(out, sizeof(out));
848 6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	772
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	773 /* Create the remainder of the hash buffer, to generate the exchange hash.
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	774 See RFC5656 section 4 page 7 */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	775 if (IS_DROPBEAR_CLIENT) {
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	776 Q_C = param->pub;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	777 Q_S = buf_pub_them->data;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	778 } else {
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	779 Q_S = param->pub;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	780 Q_C = buf_pub_them->data;
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	781 }
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	782
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	783 /* K_S, the host key */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	784 buf_put_pub_key(ses.kexhashbuf, hostkey, ses.newkeys->algo_hostkey);
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	785 /* Q_C, client's ephemeral public key octet string */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	786 buf_putstring(ses.kexhashbuf, Q_C, CURVE25519_LEN);
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	787 /* Q_S, server's ephemeral public key octet string */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	788 buf_putstring(ses.kexhashbuf, Q_S, CURVE25519_LEN);
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	789 /* K, the shared secret */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	790 buf_putmpint(ses.kexhashbuf, ses.dh_K);
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	791
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	792 /* calculate the hash H to sign */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	793 finish_kexhashbuf();
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	794 }
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	795 #endif /* DROPBEAR_CURVE25519 */
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	796
6c69e7df3621 curve25519 Matt Johnston <matt@ucc.asn.au> parents: 805 diff changeset	797
761 ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 759 diff changeset	798
ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 759 diff changeset	799 static void finish_kexhashbuf(void) {
ac2158e3e403 ecc kind of works, needs fixing/testing Matt Johnston <matt@ucc.asn.au> parents: 759 diff changeset	800 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	801 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	802
793 70625eed40c9 A bit of work on ecdsa for host/auth keys Matt Johnston <matt@ucc.asn.au> parents: 766 diff changeset	803 hash_desc->init(&hs);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	804 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	805 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	806 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	807 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	808 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	809 buf_setlen(ses.hash, hash_desc->hashsize);
35 0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 34 diff changeset	810
907 4a74c58e11fc Make some debug info conditional Matt Johnston <matt@ucc.asn.au> parents: 886 diff changeset	811 #if defined(DEBUG_KEXHASH) && defined(DEBUG_TRACE)
4a74c58e11fc Make some debug info conditional Matt Johnston <matt@ucc.asn.au> parents: 886 diff changeset	812 if (!debug_trace) {
4a74c58e11fc Make some debug info conditional Matt Johnston <matt@ucc.asn.au> parents: 886 diff changeset	813 printhex("kexhashbuf", ses.kexhashbuf->data, ses.kexhashbuf->len);
4a74c58e11fc Make some debug info conditional Matt Johnston <matt@ucc.asn.au> parents: 886 diff changeset	814 printhex("kexhash", ses.hash->data, ses.hash->len);
4a74c58e11fc Make some debug info conditional Matt Johnston <matt@ucc.asn.au> parents: 886 diff changeset	815 }
883 ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	816 #endif
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 858 diff changeset	817
35 0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 34 diff changeset	818 buf_burn(ses.kexhashbuf);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	819 buf_free(ses.kexhashbuf);
987 ed85797bbc85 clear hash state memory after use Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	820 m_burn(&hs, sizeof(hash_state));
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	821 ses.kexhashbuf = NULL;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	822
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	823 /* first time around, we set the session_id to H */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	824 if (ses.session_id == NULL) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	825 /* 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	826 ses.session_id = buf_newcopy(ses.hash);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	827 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	828 }
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 /* 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	831 * algos for the client or server. */
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	832 static void read_kex_algos() {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	833
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	834 /* for asymmetry */
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	835 algo_type * c2s_hash_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	836 algo_type * s2c_hash_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	837 algo_type * c2s_cipher_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	838 algo_type * s2c_cipher_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	839 algo_type * c2s_comp_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	840 algo_type * s2c_comp_algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	841 /* the generic one */
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	842 algo_type * algo = NULL;
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	843
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	844 /* which algo couldn't match */
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	845 char * erralgo = NULL;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	846
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	847 int goodguess = 0;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	848 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	849 true after */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	850
746 465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 741 diff changeset	851 #ifdef USE_KEXGUESS2
740 3062da90dab8 Add kexguess2 behaviour Matt Johnston <matt@ucc.asn.au> parents: 739 diff changeset	852 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	853 #else
465fefc4f6e0 Put some #ifdef options around first-follows options in case they Matt Johnston <matt@ucc.asn.au> parents: 741 diff changeset	854 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	855 #endif
740 3062da90dab8 Add kexguess2 behaviour Matt Johnston <matt@ucc.asn.au> parents: 739 diff changeset	856
855 04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	857 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	858
04ede40a529a - Some fixes for old compilers like tru64 v4 from Daniel Richard G. Matt Johnston <matt@ucc.asn.au> parents: 852 diff changeset	859 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	860
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	861 /* 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	862 algo = buf_match_algo(ses.payload, sshkex, &kexguess2, &goodguess);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	863 allgood &= goodguess;
740 3062da90dab8 Add kexguess2 behaviour Matt Johnston <matt@ucc.asn.au> parents: 739 diff changeset	864 if (algo == NULL \|\| algo->val == KEXGUESS2_ALGO_ID) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	865 erralgo = "kex";
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	866 goto error;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	867 }
740 3062da90dab8 Add kexguess2 behaviour Matt Johnston <matt@ucc.asn.au> parents: 739 diff changeset	868 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	869 TRACE(("kex algo %s", algo->name))
756 bf9dc2d9c2b1 more bits on ecc branch Matt Johnston <matt@ucc.asn.au> parents: 755 diff changeset	870 ses.newkeys->algo_kex = algo->data;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	871
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	872 /* 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	873 algo = buf_match_algo(ses.payload, sshhostkey, &kexguess2, &goodguess);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	874 allgood &= goodguess;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	875 if (algo == NULL) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	876 erralgo = "hostkey";
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	877 goto error;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	878 }
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	879 TRACE(("hostkey algo %s", algo->name))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	880 ses.newkeys->algo_hostkey = algo->val;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	881
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	882 /* 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	883 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	884 if (c2s_cipher_algo == NULL) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	885 erralgo = "enc c->s";
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	886 goto error;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	887 }
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	888 TRACE(("enc c2s is %s", c2s_cipher_algo->name))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	889
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	890 /* 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	891 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	892 if (s2c_cipher_algo == NULL) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	893 erralgo = "enc s->c";
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	894 goto error;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	895 }
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	896 TRACE(("enc s2c is %s", s2c_cipher_algo->name))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	897
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	898 /* 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	899 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	900 if (c2s_hash_algo == NULL) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	901 erralgo = "mac c->s";
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	902 goto error;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	903 }
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	904 TRACE(("hash c2s is %s", c2s_hash_algo->name))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	905
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	906 /* 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	907 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	908 if (s2c_hash_algo == NULL) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	909 erralgo = "mac s->c";
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	910 goto error;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	911 }
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	912 TRACE(("hash s2c is %s", s2c_hash_algo->name))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	913
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	914 /* 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	915 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	916 if (c2s_comp_algo == NULL) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	917 erralgo = "comp c->s";
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	918 goto error;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	919 }
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	920 TRACE(("hash c2s is %s", c2s_comp_algo->name))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	921
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	922 /* 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	923 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	924 if (s2c_comp_algo == NULL) {
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	925 erralgo = "comp s->c";
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	926 goto error;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	927 }
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	928 TRACE(("hash s2c is %s", s2c_comp_algo->name))
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	929
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	930 /* languages_client_to_server */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	931 buf_eatstring(ses.payload);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	932
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	933 /* languages_server_to_client */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	934 buf_eatstring(ses.payload);
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	935
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	936 /* 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	937 if (buf_getbool(ses.payload)) {
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	938 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	939 ses.kexstate.them_firstfollows = 1;
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	940 /* 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	941 if (!allgood) {
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	942 ses.ignorenext = 1;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	943 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	944 }
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	945
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	946 /* Handle the asymmetry */
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	947 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	948 ses.newkeys->recv.algo_crypt =
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	949 (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	950 ses.newkeys->trans.algo_crypt =
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	951 (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	952 ses.newkeys->recv.crypt_mode =
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	953 (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	954 ses.newkeys->trans.crypt_mode =
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	955 (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	956 ses.newkeys->recv.algo_mac =
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	957 (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	958 ses.newkeys->trans.algo_mac =
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	959 (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	960 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	961 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	962 } else {
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	963 /* SERVER */
534 0431915df79f - Get rid of decryptreadbuf, just decrypt in-place with readbuf Matt Johnston <matt@ucc.asn.au> parents: 502 diff changeset	964 ses.newkeys->recv.algo_crypt =
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	965 (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	966 ses.newkeys->trans.algo_crypt =
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	967 (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	968 ses.newkeys->recv.crypt_mode =
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	969 (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	970 ses.newkeys->trans.crypt_mode =
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	971 (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	972 ses.newkeys->recv.algo_mac =
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	973 (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	974 ses.newkeys->trans.algo_mac =
36 a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	975 (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	976 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	977 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	978 }
a600c015562d Handle differing c2s and s2c algorithms properly Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	979
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	980 /* reserved for future extensions */
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	981 buf_getint(ses.payload);
739 d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	982
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	983 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	984 TRACE(("our_first_follows_matches 1"))
d44325108d0e first_kex_packet_follows working, needs tidying Matt Johnston <matt@ucc.asn.au> parents: 712 diff changeset	985 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	986 }
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	987 return;
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	988
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	989 error:
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 575 diff changeset	990 dropbear_exit("No matching algo %s", erralgo);
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	991 }

Mercurial > dropbear

annotate common-kex.c @ 1060:4c733310c21d nocircbuffer