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d02b48c6 | 1 | /* crypto/dh/dh_lib.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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" | |
ec577822 BM |
61 | #include <openssl/bn.h> |
62 | #include <openssl/dh.h> | |
d02b48c6 | 63 | |
e778802f | 64 | const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT; |
d02b48c6 | 65 | |
13066cee DSH |
66 | static DH_METHOD *default_DH_method; |
67 | static int dh_meth_num = 0; | |
68 | static STACK *dh_meth = NULL; | |
69 | ||
70 | void DH_set_default_method(DH_METHOD *meth) | |
71 | { | |
72 | default_DH_method = meth; | |
73 | } | |
74 | ||
75 | DH_METHOD *DH_get_default_method(void) | |
76 | { | |
77 | if(!default_DH_method) default_DH_method = DH_OpenSSL(); | |
78 | return default_DH_method; | |
79 | } | |
80 | ||
81 | DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth) | |
82 | { | |
83 | DH_METHOD *mtmp; | |
84 | mtmp = dh->meth; | |
85 | if (mtmp->finish) mtmp->finish(dh); | |
86 | dh->meth = meth; | |
87 | if (meth->init) meth->init(dh); | |
88 | return mtmp; | |
89 | } | |
90 | ||
6b691a5c | 91 | DH *DH_new(void) |
13066cee DSH |
92 | { |
93 | return DH_new_method(NULL); | |
94 | } | |
95 | ||
96 | DH *DH_new_method(DH_METHOD *meth) | |
d02b48c6 RE |
97 | { |
98 | DH *ret; | |
d02b48c6 | 99 | ret=(DH *)Malloc(sizeof(DH)); |
13066cee | 100 | |
d02b48c6 RE |
101 | if (ret == NULL) |
102 | { | |
103 | DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE); | |
104 | return(NULL); | |
105 | } | |
13066cee DSH |
106 | if(!default_DH_method) default_DH_method = DH_OpenSSL(); |
107 | if(meth) ret->meth = meth; | |
108 | else ret->meth = default_DH_method; | |
d02b48c6 RE |
109 | ret->pad=0; |
110 | ret->version=0; | |
111 | ret->p=NULL; | |
112 | ret->g=NULL; | |
113 | ret->length=0; | |
114 | ret->pub_key=NULL; | |
115 | ret->priv_key=NULL; | |
dfeab068 | 116 | ret->method_mont_p=NULL; |
13066cee DSH |
117 | ret->references = 1; |
118 | ret->flags=ret->meth->flags; | |
119 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) | |
120 | { | |
121 | Free(ret); | |
122 | ret=NULL; | |
123 | } | |
124 | else | |
125 | CRYPTO_new_ex_data(dh_meth,(char *)ret,&ret->ex_data); | |
d02b48c6 RE |
126 | return(ret); |
127 | } | |
128 | ||
6b691a5c | 129 | void DH_free(DH *r) |
d02b48c6 | 130 | { |
13066cee | 131 | int i; |
ad65ce75 | 132 | if(r == NULL) return; |
13066cee DSH |
133 | i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); |
134 | #ifdef REF_PRINT | |
135 | REF_PRINT("DH",r); | |
136 | #endif | |
137 | if (i > 0) return; | |
138 | #ifdef REF_CHECK | |
139 | if (i < 0) | |
140 | { | |
141 | fprintf(stderr,"DH_free, bad reference count\n"); | |
142 | abort(); | |
143 | } | |
144 | #endif | |
145 | ||
d02b48c6 RE |
146 | if (r->p != NULL) BN_clear_free(r->p); |
147 | if (r->g != NULL) BN_clear_free(r->g); | |
148 | if (r->pub_key != NULL) BN_clear_free(r->pub_key); | |
149 | if (r->priv_key != NULL) BN_clear_free(r->priv_key); | |
150 | Free(r); | |
151 | } | |
152 | ||
13066cee DSH |
153 | int DH_get_ex_new_index(long argl, char *argp, int (*new_func)(), |
154 | int (*dup_func)(), void (*free_func)()) | |
155 | { | |
156 | dh_meth_num++; | |
157 | return(CRYPTO_get_ex_new_index(dh_meth_num-1, | |
158 | &dh_meth,argl,argp,new_func,dup_func,free_func)); | |
159 | } | |
160 | ||
161 | int DH_set_ex_data(DH *d, int idx, char *arg) | |
162 | { | |
163 | return(CRYPTO_set_ex_data(&d->ex_data,idx,arg)); | |
164 | } | |
165 | ||
166 | char *DH_get_ex_data(DH *d, int idx) | |
167 | { | |
168 | return(CRYPTO_get_ex_data(&d->ex_data,idx)); | |
169 | } | |
170 | ||
6b691a5c | 171 | int DH_size(DH *dh) |
d02b48c6 RE |
172 | { |
173 | return(BN_num_bytes(dh->p)); | |
174 | } |