diff options
Diffstat (limited to 'src/lib/libcrypto/dh/dh_check.c')
-rw-r--r-- | src/lib/libcrypto/dh/dh_check.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/src/lib/libcrypto/dh/dh_check.c b/src/lib/libcrypto/dh/dh_check.c deleted file mode 100644 index 066898174e..0000000000 --- a/src/lib/libcrypto/dh/dh_check.c +++ /dev/null | |||
@@ -1,142 +0,0 @@ | |||
1 | /* crypto/dh/dh_check.c */ | ||
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 | #include "cryptlib.h" | ||
61 | #include <openssl/bn.h> | ||
62 | #include <openssl/dh.h> | ||
63 | |||
64 | /* Check that p is a safe prime and | ||
65 | * if g is 2, 3 or 5, check that it is a suitable generator | ||
66 | * where | ||
67 | * for 2, p mod 24 == 11 | ||
68 | * for 3, p mod 12 == 5 | ||
69 | * for 5, p mod 10 == 3 or 7 | ||
70 | * should hold. | ||
71 | */ | ||
72 | |||
73 | int DH_check(const DH *dh, int *ret) | ||
74 | { | ||
75 | int ok=0; | ||
76 | BN_CTX *ctx=NULL; | ||
77 | BN_ULONG l; | ||
78 | BIGNUM *q=NULL; | ||
79 | |||
80 | *ret=0; | ||
81 | ctx=BN_CTX_new(); | ||
82 | if (ctx == NULL) goto err; | ||
83 | q=BN_new(); | ||
84 | if (q == NULL) goto err; | ||
85 | |||
86 | if (BN_is_word(dh->g,DH_GENERATOR_2)) | ||
87 | { | ||
88 | l=BN_mod_word(dh->p,24); | ||
89 | if (l != 11) *ret|=DH_NOT_SUITABLE_GENERATOR; | ||
90 | } | ||
91 | #if 0 | ||
92 | else if (BN_is_word(dh->g,DH_GENERATOR_3)) | ||
93 | { | ||
94 | l=BN_mod_word(dh->p,12); | ||
95 | if (l != 5) *ret|=DH_NOT_SUITABLE_GENERATOR; | ||
96 | } | ||
97 | #endif | ||
98 | else if (BN_is_word(dh->g,DH_GENERATOR_5)) | ||
99 | { | ||
100 | l=BN_mod_word(dh->p,10); | ||
101 | if ((l != 3) && (l != 7)) | ||
102 | *ret|=DH_NOT_SUITABLE_GENERATOR; | ||
103 | } | ||
104 | else | ||
105 | *ret|=DH_UNABLE_TO_CHECK_GENERATOR; | ||
106 | |||
107 | if (!BN_is_prime_ex(dh->p,BN_prime_checks,ctx,NULL)) | ||
108 | *ret|=DH_CHECK_P_NOT_PRIME; | ||
109 | else | ||
110 | { | ||
111 | if (!BN_rshift1(q,dh->p)) goto err; | ||
112 | if (!BN_is_prime_ex(q,BN_prime_checks,ctx,NULL)) | ||
113 | *ret|=DH_CHECK_P_NOT_SAFE_PRIME; | ||
114 | } | ||
115 | ok=1; | ||
116 | err: | ||
117 | if (ctx != NULL) BN_CTX_free(ctx); | ||
118 | if (q != NULL) BN_free(q); | ||
119 | return(ok); | ||
120 | } | ||
121 | |||
122 | int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret) | ||
123 | { | ||
124 | int ok=0; | ||
125 | BIGNUM *q=NULL; | ||
126 | |||
127 | *ret=0; | ||
128 | q=BN_new(); | ||
129 | if (q == NULL) goto err; | ||
130 | BN_set_word(q,1); | ||
131 | if (BN_cmp(pub_key,q)<=0) | ||
132 | *ret|=DH_CHECK_PUBKEY_TOO_SMALL; | ||
133 | BN_copy(q,dh->p); | ||
134 | BN_sub_word(q,1); | ||
135 | if (BN_cmp(pub_key,q)>=0) | ||
136 | *ret|=DH_CHECK_PUBKEY_TOO_LARGE; | ||
137 | |||
138 | ok = 1; | ||
139 | err: | ||
140 | if (q != NULL) BN_free(q); | ||
141 | return(ok); | ||
142 | } | ||