OpenCoverage

kexecdh.c

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1/* $OpenBSD: kexecdh.c,v 1.6 2015/01/19 20:16:15 markus Exp $ */-
2/*-
3 * Copyright (c) 2001 Markus Friedl. All rights reserved.-
4 * Copyright (c) 2010 Damien Miller. All rights reserved.-
5 *-
6 * Redistribution and use in source and binary forms, with or without-
7 * modification, are permitted provided that the following conditions-
8 * are met:-
9 * 1. Redistributions of source code must retain the above copyright-
10 * notice, this list of conditions and the following disclaimer.-
11 * 2. Redistributions in binary form must reproduce the above copyright-
12 * notice, this list of conditions and the following disclaimer in the-
13 * documentation and/or other materials provided with the distribution.-
14 *-
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR-
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES-
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.-
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,-
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,-
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY-
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT-
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF-
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.-
25 */-
26-
27#include "includes.h"-
28-
29#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC)-
30-
31#include <sys/types.h>-
32-
33#include <signal.h>-
34#include <string.h>-
35-
36#include <openssl/bn.h>-
37#include <openssl/evp.h>-
38#include <openssl/ec.h>-
39#include <openssl/ecdh.h>-
40-
41#include "ssh2.h"-
42#include "sshkey.h"-
43#include "cipher.h"-
44#include "kex.h"-
45#include "sshbuf.h"-
46#include "digest.h"-
47#include "ssherr.h"-
48-
49int-
50kex_ecdh_hash(-
51 int hash_alg,-
52 const EC_GROUP *ec_group,-
53 const char *client_version_string,-
54 const char *server_version_string,-
55 const u_char *ckexinit, size_t ckexinitlen,-
56 const u_char *skexinit, size_t skexinitlen,-
57 const u_char *serverhostkeyblob, size_t sbloblen,-
58 const EC_POINT *client_dh_pub,-
59 const EC_POINT *server_dh_pub,-
60 const BIGNUM *shared_secret,-
61 u_char *hash, size_t *hashlen)-
62{-
63 struct sshbuf *b;-
64 int r;-
65-
66 if (*hashlen < ssh_digest_bytes(hash_alg))
*hashlen < ssh...ytes(hash_alg)Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
67 return SSH_ERR_INVALID_ARGUMENT;
never executed: return -10;
0
68 if ((b = sshbuf_new()) == NULL)
(b = sshbuf_ne...== ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
69 return SSH_ERR_ALLOC_FAIL;
never executed: return -2;
0
70 if ((r = sshbuf_put_cstring(b, client_version_string)) != 0 ||
(r = sshbuf_pu..._string)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
71 (r = sshbuf_put_cstring(b, server_version_string)) != 0 ||
(r = sshbuf_pu..._string)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
72 /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */-
73 (r = sshbuf_put_u32(b, ckexinitlen+1)) != 0 ||
(r = sshbuf_pu...itlen+1)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
74 (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_pu...8(b, 20)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
75 (r = sshbuf_put(b, ckexinit, ckexinitlen)) != 0 ||
(r = sshbuf_pu...initlen)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
76 (r = sshbuf_put_u32(b, skexinitlen+1)) != 0 ||
(r = sshbuf_pu...itlen+1)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
77 (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_pu...8(b, 20)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
78 (r = sshbuf_put(b, skexinit, skexinitlen)) != 0 ||
(r = sshbuf_pu...initlen)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
79 (r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) != 0 ||
(r = sshbuf_pu...bloblen)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
80 (r = sshbuf_put_ec(b, client_dh_pub, ec_group)) != 0 ||
(r = sshbuf_pu...c_group)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
81 (r = sshbuf_put_ec(b, server_dh_pub, ec_group)) != 0 ||
(r = sshbuf_pu...c_group)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
82 (r = sshbuf_put_bignum2(b, shared_secret)) != 0) {
(r = sshbuf_pu..._secret)) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
83 sshbuf_free(b);-
84 return r;
never executed: return r;
0
85 }-
86#ifdef DEBUG_KEX-
87 sshbuf_dump(b, stderr);-
88#endif-
89 if (ssh_digest_buffer(hash_alg, b, hash, *hashlen) != 0) {
ssh_digest_buf...*hashlen) != 0Description
TRUEnever evaluated
FALSEevaluated 120 times by 1 test
Evaluated by:
  • test_kex
0-120
90 sshbuf_free(b);-
91 return SSH_ERR_LIBCRYPTO_ERROR;
never executed: return -22;
0
92 }-
93 sshbuf_free(b);-
94 *hashlen = ssh_digest_bytes(hash_alg);-
95#ifdef DEBUG_KEX-
96 dump_digest("hash", hash, *hashlen);-
97#endif-
98 return 0;
executed 120 times by 1 test: return 0;
Executed by:
  • test_kex
120
99}-
100#endif /* defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) */-
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