]>
Commit | Line | Data |
---|---|---|
5598e598 | 1 | /* |
905081a4 | 2 | * Copyright (c) 2001,2002 Simon Wilkinson. All rights reserved. |
5598e598 | 3 | * |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * | |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
24 | ||
25 | #include "includes.h" | |
26 | ||
27 | #ifdef GSSAPI | |
28 | ||
29 | #include <openssl/crypto.h> | |
30 | #include <openssl/bn.h> | |
31 | ||
5598e598 | 32 | #include "buffer.h" |
33 | #include "bufaux.h" | |
5598e598 | 34 | #include "ssh2.h" |
b46fa825 | 35 | #include "kex.h" |
5598e598 | 36 | |
37 | /* This is now the same as the DH hash ... */ | |
38 | ||
39 | u_char * | |
40 | kex_gssapi_hash( | |
41 | char *client_version_string, | |
42 | char *server_version_string, | |
43 | char *ckexinit, int ckexinitlen, | |
44 | char *skexinit, int skexinitlen, | |
45 | u_char *serverhostkeyblob, int sbloblen, | |
46 | BIGNUM *client_dh_pub, | |
47 | BIGNUM *server_dh_pub, | |
48 | BIGNUM *shared_secret) | |
49 | { | |
50 | Buffer b; | |
51 | static u_char digest[EVP_MAX_MD_SIZE]; | |
52 | EVP_MD *evp_md = EVP_sha1(); | |
53 | EVP_MD_CTX md; | |
54 | ||
55 | buffer_init(&b); | |
56 | buffer_put_string(&b, client_version_string, strlen(client_version_string)); | |
57 | buffer_put_string(&b, server_version_string, strlen(server_version_string)); | |
58 | ||
59 | /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */ | |
60 | buffer_put_int(&b, ckexinitlen+1); | |
61 | buffer_put_char(&b, SSH2_MSG_KEXINIT); | |
62 | buffer_append(&b, ckexinit, ckexinitlen); | |
63 | buffer_put_int(&b, skexinitlen+1); | |
64 | buffer_put_char(&b, SSH2_MSG_KEXINIT); | |
65 | buffer_append(&b, skexinit, skexinitlen); | |
66 | ||
67 | buffer_put_string(&b, serverhostkeyblob, sbloblen); | |
68 | buffer_put_bignum2(&b, client_dh_pub); | |
69 | buffer_put_bignum2(&b, server_dh_pub); | |
70 | buffer_put_bignum2(&b, shared_secret); | |
71 | ||
72 | #ifdef DEBUG_KEX | |
73 | buffer_dump(&b); | |
74 | #endif | |
75 | EVP_DigestInit(&md, evp_md); | |
76 | EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b)); | |
77 | EVP_DigestFinal(&md, digest, NULL); | |
78 | ||
79 | buffer_free(&b); | |
80 | ||
81 | #ifdef DEBUG_KEX | |
82 | dump_digest("hash", digest, evp_md->md_size); | |
83 | #endif | |
84 | return digest; | |
85 | } | |
86 | ||
5598e598 | 87 | #endif /* GSSAPI */ |