diff options
Diffstat (limited to 'src/lib/libcrypto/dh/dh_check.c')
-rw-r--r-- | src/lib/libcrypto/dh/dh_check.c | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/src/lib/libcrypto/dh/dh_check.c b/src/lib/libcrypto/dh/dh_check.c deleted file mode 100644 index a6010f0a6d..0000000000 --- a/src/lib/libcrypto/dh/dh_check.c +++ /dev/null | |||
@@ -1,139 +0,0 @@ | |||
1 | /* $OpenBSD: dh_check.c,v 1.16 2016/07/05 02:54:35 bcook Exp $ */ | ||
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | ||
3 | * All rights reserved. | ||
4 | * | ||
5 | * This package is an SSL implementation written | ||
6 | * by Eric Young (eay@cryptsoft.com). | ||
7 | * The implementation was written so as to conform with Netscapes SSL. | ||
8 | * | ||
9 | * This library is free for commercial and non-commercial use as long as | ||
10 | * the following conditions are aheared to. The following conditions | ||
11 | * apply to all code found in this distribution, be it the RC4, RSA, | ||
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | ||
13 | * included with this distribution is covered by the same copyright terms | ||
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | ||
15 | * | ||
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | ||
17 | * the code are not to be removed. | ||
18 | * If this package is used in a product, Eric Young should be given attribution | ||
19 | * as the author of the parts of the library used. | ||
20 | * This can be in the form of a textual message at program startup or | ||
21 | * in documentation (online or textual) provided with the package. | ||
22 | * | ||
23 | * Redistribution and use in source and binary forms, with or without | ||
24 | * modification, are permitted provided that the following conditions | ||
25 | * are met: | ||
26 | * 1. Redistributions of source code must retain the copyright | ||
27 | * notice, this list of conditions and the following disclaimer. | ||
28 | * 2. Redistributions in binary form must reproduce the above copyright | ||
29 | * notice, this list of conditions and the following disclaimer in the | ||
30 | * documentation and/or other materials provided with the distribution. | ||
31 | * 3. All advertising materials mentioning features or use of this software | ||
32 | * must display the following acknowledgement: | ||
33 | * "This product includes cryptographic software written by | ||
34 | * Eric Young (eay@cryptsoft.com)" | ||
35 | * The word 'cryptographic' can be left out if the rouines from the library | ||
36 | * being used are not cryptographic related :-). | ||
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | ||
38 | * the apps directory (application code) you must include an acknowledgement: | ||
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | ||
40 | * | ||
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | ||
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | ||
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
51 | * SUCH DAMAGE. | ||
52 | * | ||
53 | * The licence and distribution terms for any publically available version or | ||
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | ||
55 | * copied and put under another distribution licence | ||
56 | * [including the GNU Public Licence.] | ||
57 | */ | ||
58 | |||
59 | #include <stdio.h> | ||
60 | |||
61 | #include <openssl/bn.h> | ||
62 | #include <openssl/dh.h> | ||
63 | |||
64 | /* | ||
65 | * Check that p is a safe prime and | ||
66 | * if g is 2, 3 or 5, check that it is a suitable generator | ||
67 | * where | ||
68 | * for 2, p mod 24 == 11 | ||
69 | * for 3, p mod 12 == 5 | ||
70 | * for 5, p mod 10 == 3 or 7 | ||
71 | * should hold. | ||
72 | */ | ||
73 | |||
74 | int | ||
75 | DH_check(const DH *dh, int *ret) | ||
76 | { | ||
77 | int ok = 0; | ||
78 | BN_CTX *ctx = NULL; | ||
79 | BN_ULONG l; | ||
80 | BIGNUM *q = NULL; | ||
81 | |||
82 | *ret = 0; | ||
83 | ctx = BN_CTX_new(); | ||
84 | if (ctx == NULL) | ||
85 | goto err; | ||
86 | q = BN_new(); | ||
87 | if (q == NULL) | ||
88 | goto err; | ||
89 | |||
90 | if (BN_is_word(dh->g, DH_GENERATOR_2)) { | ||
91 | l = BN_mod_word(dh->p, 24); | ||
92 | if (l == (BN_ULONG)-1) | ||
93 | goto err; | ||
94 | if (l != 11) | ||
95 | *ret |= DH_NOT_SUITABLE_GENERATOR; | ||
96 | } else if (BN_is_word(dh->g, DH_GENERATOR_5)) { | ||
97 | l = BN_mod_word(dh->p, 10); | ||
98 | if (l == (BN_ULONG)-1) | ||
99 | goto err; | ||
100 | if (l != 3 && l != 7) | ||
101 | *ret |= DH_NOT_SUITABLE_GENERATOR; | ||
102 | } else | ||
103 | *ret |= DH_UNABLE_TO_CHECK_GENERATOR; | ||
104 | |||
105 | if (!BN_is_prime_ex(dh->p, BN_prime_checks, ctx, NULL)) | ||
106 | *ret |= DH_CHECK_P_NOT_PRIME; | ||
107 | else { | ||
108 | if (!BN_rshift1(q, dh->p)) | ||
109 | goto err; | ||
110 | if (!BN_is_prime_ex(q, BN_prime_checks, ctx, NULL)) | ||
111 | *ret |= DH_CHECK_P_NOT_SAFE_PRIME; | ||
112 | } | ||
113 | ok = 1; | ||
114 | err: | ||
115 | BN_CTX_free(ctx); | ||
116 | BN_free(q); | ||
117 | return ok; | ||
118 | } | ||
119 | |||
120 | int | ||
121 | DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret) | ||
122 | { | ||
123 | BIGNUM *q = NULL; | ||
124 | |||
125 | *ret = 0; | ||
126 | q = BN_new(); | ||
127 | if (q == NULL) | ||
128 | return 0; | ||
129 | BN_set_word(q, 1); | ||
130 | if (BN_cmp(pub_key, q) <= 0) | ||
131 | *ret |= DH_CHECK_PUBKEY_TOO_SMALL; | ||
132 | BN_copy(q, dh->p); | ||
133 | BN_sub_word(q, 1); | ||
134 | if (BN_cmp(pub_key, q) >= 0) | ||
135 | *ret |= DH_CHECK_PUBKEY_TOO_LARGE; | ||
136 | |||
137 | BN_free(q); | ||
138 | return 1; | ||
139 | } | ||