OpenCoverage

kexdh.c

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1/* $OpenBSD: kexdh.c,v 1.26 2016/05/02 10:26:04 djm Exp $ */-
2/*-
3 * Copyright (c) 2001 Markus Friedl. All rights reserved.-
4 *-
5 * Redistribution and use in source and binary forms, with or without-
6 * modification, are permitted provided that the following conditions-
7 * are met:-
8 * 1. Redistributions of source code must retain the above copyright-
9 * notice, this list of conditions and the following disclaimer.-
10 * 2. Redistributions in binary form must reproduce the above copyright-
11 * notice, this list of conditions and the following disclaimer in the-
12 * documentation and/or other materials provided with the distribution.-
13 *-
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR-
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES-
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.-
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,-
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,-
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY-
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT-
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF-
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.-
24 */-
25-
26#include "includes.h"-
27-
28#ifdef WITH_OPENSSL-
29-
30#include <sys/types.h>-
31-
32#include <signal.h>-
33-
34#include <openssl/evp.h>-
35-
36#include "openbsd-compat/openssl-compat.h"-
37-
38#include "ssh2.h"-
39#include "sshkey.h"-
40#include "cipher.h"-
41#include "kex.h"-
42#include "ssherr.h"-
43#include "sshbuf.h"-
44#include "digest.h"-
45-
46int-
47kex_dh_hash(-
48 int hash_alg,-
49 const char *client_version_string,-
50 const char *server_version_string,-
51 const u_char *ckexinit, size_t ckexinitlen,-
52 const u_char *skexinit, size_t skexinitlen,-
53 const u_char *serverhostkeyblob, size_t sbloblen,-
54 const BIGNUM *client_dh_pub,-
55 const BIGNUM *server_dh_pub,-
56 const BIGNUM *shared_secret,-
57 u_char *hash, size_t *hashlen)-
58{-
59 struct sshbuf *b;-
60 int r;-
61-
62 if (*hashlen < ssh_digest_bytes(hash_alg))
*hashlen < ssh...ytes(hash_alg)Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
63 return SSH_ERR_INVALID_ARGUMENT;
never executed: return -10;
0
64 if ((b = sshbuf_new()) == NULL)
(b = sshbuf_ne...== ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
65 return SSH_ERR_ALLOC_FAIL;
never executed: return -2;
0
66 if ((r = sshbuf_put_cstring(b, client_version_string)) != 0 ||
(r = sshbuf_pu..._string)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
67 (r = sshbuf_put_cstring(b, server_version_string)) != 0 ||
(r = sshbuf_pu..._string)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
68 /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */-
69 (r = sshbuf_put_u32(b, ckexinitlen+1)) != 0 ||
(r = sshbuf_pu...itlen+1)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
70 (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_pu...8(b, 20)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
71 (r = sshbuf_put(b, ckexinit, ckexinitlen)) != 0 ||
(r = sshbuf_pu...initlen)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
72 (r = sshbuf_put_u32(b, skexinitlen+1)) != 0 ||
(r = sshbuf_pu...itlen+1)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
73 (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_pu...8(b, 20)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
74 (r = sshbuf_put(b, skexinit, skexinitlen)) != 0 ||
(r = sshbuf_pu...initlen)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
75 (r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) != 0 ||
(r = sshbuf_pu...bloblen)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
76 (r = sshbuf_put_bignum2(b, client_dh_pub)) != 0 ||
(r = sshbuf_pu..._dh_pub)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
77 (r = sshbuf_put_bignum2(b, server_dh_pub)) != 0 ||
(r = sshbuf_pu..._dh_pub)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
78 (r = sshbuf_put_bignum2(b, shared_secret)) != 0) {
(r = sshbuf_pu..._secret)) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
79 sshbuf_free(b);-
80 return r;
never executed: return r;
0
81 }-
82#ifdef DEBUG_KEX-
83 sshbuf_dump(b, stderr);-
84#endif-
85 if (ssh_digest_buffer(hash_alg, b, hash, *hashlen) != 0) {
ssh_digest_buf...*hashlen) != 0Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • test_kex
0-80
86 sshbuf_free(b);-
87 return SSH_ERR_LIBCRYPTO_ERROR;
never executed: return -22;
0
88 }-
89 sshbuf_free(b);-
90 *hashlen = ssh_digest_bytes(hash_alg);-
91#ifdef DEBUG_KEX-
92 dump_digest("hash", hash, *hashlen);-
93#endif-
94 return 0;
executed 80 times by 1 test: return 0;
Executed by:
  • test_kex
80
95}-
96#endif /* WITH_OPENSSL */-
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