Mercurial > dropbear

comparison common-kex.c @ 118:5312ca05ed48 private-rez

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propagate of 717950f4061f1123659ee87c7c168805af920ab7 and 839f98f136788cc1466e4641bf796f96040a085d from branch 'matt.dbclient.authpam' to 'matt.dbclient.rez'
author Matt Johnston <matt@ucc.asn.au>
date Sun, 12 Sep 2004 04:56:50 +0000
parents 2010f4119c1a
children 0cfba3034be5
comparison
equal deleted inserted replaced
57:3b2a5a1c4347 118:5312ca05ed48
1 /* 1 /*
2 * Dropbear - a SSH2 server 2 * Dropbear SSH
3 * SSH client implementation
4 *
5 * This code is copied from the larger file "kex.c"
6 * some functions are verbatim, others are generalized --mihnea
7 * 3 *
8 * Copyright (c) 2002-2004 Matt Johnston 4 * Copyright (c) 2002-2004 Matt Johnston
9 * Portions Copyright (c) 2004 by Mihnea Stoenescu 5 * Portions Copyright (c) 2004 by Mihnea Stoenescu
10 * All rights reserved. 6 * All rights reserved.
11 * 7 *
466 TRACE(("leave recv_msg_kexinit")); 462 TRACE(("leave recv_msg_kexinit"));
467 } 463 }
468 464
469 /* Initialises and generate one side of the diffie-hellman key exchange values. 465 /* Initialises and generate one side of the diffie-hellman key exchange values.
470 * See the ietf-secsh-transport draft, section 6, for details */ 466 * See the ietf-secsh-transport draft, section 6, for details */
467 /* dh_pub and dh_priv MUST be already initialised */
471 void gen_kexdh_vals(mp_int *dh_pub, mp_int *dh_priv) { 468 void gen_kexdh_vals(mp_int *dh_pub, mp_int *dh_priv) {
472 469
473 mp_int dh_p, dh_q, dh_g; 470 DEF_MP_INT(dh_p);
471 DEF_MP_INT(dh_q);
472 DEF_MP_INT(dh_g);
474 unsigned char randbuf[DH_P_LEN]; 473 unsigned char randbuf[DH_P_LEN];
475 int dh_q_len; 474 int dh_q_len;
476 475
477 TRACE(("enter send_msg_kexdh_reply")); 476 TRACE(("enter send_msg_kexdh_reply"));
478 477
479 m_mp_init_multi(&dh_g, &dh_p, &dh_q, dh_priv, dh_pub, NULL); 478 m_mp_init_multi(&dh_g, &dh_p, &dh_q, NULL);
480 479
481 /* read the prime and generator*/ 480 /* read the prime and generator*/
482 if (mp_read_unsigned_bin(&dh_p, (unsigned char*)dh_p_val, DH_P_LEN) 481 if (mp_read_unsigned_bin(&dh_p, (unsigned char*)dh_p_val, DH_P_LEN)
483 != MP_OKAY) { 482 != MP_OKAY) {
484 dropbear_exit("Diffie-Hellman error"); 483 dropbear_exit("Diffie-Hellman error");
633 TRACE(("hostkey algo %s", algo->name)); 632 TRACE(("hostkey algo %s", algo->name));
634 ses.newkeys->algo_hostkey = algo->val; 633 ses.newkeys->algo_hostkey = algo->val;
635 634
636 /* encryption_algorithms_client_to_server */ 635 /* encryption_algorithms_client_to_server */
637 c2s_cipher_algo = ses.buf_match_algo(ses.payload, sshciphers, &goodguess); 636 c2s_cipher_algo = ses.buf_match_algo(ses.payload, sshciphers, &goodguess);
638 if (algo == NULL) { 637 if (c2s_cipher_algo == NULL) {
639 erralgo = "enc c->s"; 638 erralgo = "enc c->s";
640 goto error; 639 goto error;
641 } 640 }
641 TRACE(("c2s is %s", c2s_cipher_algo->name));
642 642
643 /* encryption_algorithms_server_to_client */ 643 /* encryption_algorithms_server_to_client */
644 s2c_cipher_algo = ses.buf_match_algo(ses.payload, sshciphers, &goodguess); 644 s2c_cipher_algo = ses.buf_match_algo(ses.payload, sshciphers, &goodguess);
645 if (algo == NULL) { 645 if (s2c_cipher_algo == NULL) {
646 erralgo = "enc s->c"; 646 erralgo = "enc s->c";
647 goto error; 647 goto error;
648 } 648 }
649 TRACE(("s2c is %s", s2c_cipher_algo->name));
649 650
650 /* mac_algorithms_client_to_server */ 651 /* mac_algorithms_client_to_server */
651 c2s_hash_algo = ses.buf_match_algo(ses.payload, sshhashes, &goodguess); 652 c2s_hash_algo = ses.buf_match_algo(ses.payload, sshhashes, &goodguess);
652 if (algo == NULL) { 653 if (c2s_hash_algo == NULL) {
653 erralgo = "mac c->s"; 654 erralgo = "mac c->s";
654 goto error; 655 goto error;
655 } 656 }
656 657
657 /* mac_algorithms_server_to_client */ 658 /* mac_algorithms_server_to_client */
658 s2c_hash_algo = ses.buf_match_algo(ses.payload, sshhashes, &goodguess); 659 s2c_hash_algo = ses.buf_match_algo(ses.payload, sshhashes, &goodguess);
659 if (algo == NULL) { 660 if (s2c_hash_algo == NULL) {
660 erralgo = "mac s->c"; 661 erralgo = "mac s->c";
661 goto error; 662 goto error;
662 } 663 }
663 664
664 /* compression_algorithms_client_to_server */ 665 /* compression_algorithms_client_to_server */
665 c2s_comp_algo = ses.buf_match_algo(ses.payload, sshcompress, &goodguess); 666 c2s_comp_algo = ses.buf_match_algo(ses.payload, sshcompress, &goodguess);
666 if (algo == NULL) { 667 if (c2s_comp_algo == NULL) {
667 erralgo = "comp c->s"; 668 erralgo = "comp c->s";
668 goto error; 669 goto error;
669 } 670 }
670 671
671 /* compression_algorithms_server_to_client */ 672 /* compression_algorithms_server_to_client */
672 s2c_comp_algo = ses.buf_match_algo(ses.payload, sshcompress, &goodguess); 673 s2c_comp_algo = ses.buf_match_algo(ses.payload, sshcompress, &goodguess);
673 if (algo == NULL) { 674 if (s2c_comp_algo == NULL) {
674 erralgo = "comp s->c"; 675 erralgo = "comp s->c";
675 goto error; 676 goto error;
676 } 677 }
677 678
678 /* languages_client_to_server */ 679 /* languages_client_to_server */