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1 /*
2 * Copyright (c) 2000-2002,2011,2014 Apple Inc. All Rights Reserved.
3 *
4 * The contents of this file constitute Original Code as defined in and are
5 * subject to the Apple Public Source License Version 1.2 (the 'License').
6 * You may not use this file except in compliance with the License. Please obtain
7 * a copy of the License at http://www.apple.com/publicsource and read it before
8 * using this file.
9 *
10 * This Original Code and all software distributed under the License are
11 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
12 * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
13 * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
14 * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
15 * specific language governing rights and limitations under the License.
16 */
17
18 /* crypto/dh/dh_legacy.h */
19 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
20 * All rights reserved.
21 *
22 * This package is an SSL implementation written
23 * by Eric Young (eay@cryptsoft.com).
24 * The implementation was written so as to conform with Netscapes SSL.
25 *
26 * This library is free for commercial and non-commercial use as long as
27 * the following conditions are aheared to. The following conditions
28 * apply to all code found in this distribution, be it the RC4, RSA,
29 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
30 * included with this distribution is covered by the same copyright terms
31 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
32 *
33 * Copyright remains Eric Young's, and as such any Copyright notices in
34 * the code are not to be removed.
35 * If this package is used in a product, Eric Young should be given attribution
36 * as the author of the parts of the library used.
37 * This can be in the form of a textual message at program startup or
38 * in documentation (online or textual) provided with the package.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. All advertising materials mentioning features or use of this software
49 * must display the following acknowledgement:
50 * "This product includes cryptographic software written by
51 * Eric Young (eay@cryptsoft.com)"
52 * The word 'cryptographic' can be left out if the rouines from the library
53 * being used are not cryptographic related :-).
54 * 4. If you include any Windows specific code (or a derivative thereof) from
55 * the apps directory (application code) you must include an acknowledgement:
56 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
57 *
58 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68 * SUCH DAMAGE.
69 *
70 * The licence and distribution terms for any publically available version or
71 * derivative of this code cannot be changed. i.e. this code cannot simply be
72 * copied and put under another distribution licence
73 * [including the GNU Public Licence.]
74 */
75
76 #ifndef HEADER_DH_H
77 #define HEADER_DH_H
78
79 #ifdef NO_DH
80 #error DH is disabled.
81 #endif
82
83 #ifndef NO_BIO
84 #include <openssl/bio_legacy.h>
85 #endif
86 #include <openssl/bn_legacy.h>
87 #include <openssl/crypto_legacy.h>
88
89 #define DH_FLAG_CACHE_MONT_P 0x01
90
91 #ifdef __cplusplus
92 extern "C" {
93 #endif
94
95 typedef struct dh_st DH;
96
97 typedef struct dh_method {
98 const char *name;
99 /* Methods here */
100 int (*generate_key)(DH *dh);
101 int (*compute_key)(unsigned char *key,BIGNUM *pub_key,DH *dh);
102 int (*bn_mod_exp)(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
103 const BIGNUM *m, BN_CTX *ctx,
104 BN_MONT_CTX *m_ctx); /* Can be null */
105
106 int (*init)(DH *dh);
107 int (*finish)(DH *dh);
108 int flags;
109 char *app_data;
110 } DH_METHOD;
111
112 struct dh_st
113 {
114 /* This first argument is used to pick up errors when
115 * a DH is passed instead of a EVP_PKEY */
116 int pad;
117 int version;
118 BIGNUM *p;
119 BIGNUM *g;
120 int length; /* optional */
121 BIGNUM *pub_key; /* g^x */
122 BIGNUM *priv_key; /* x */
123
124 int flags;
125 char *method_mont_p;
126 /* Place holders if we want to do X9.42 DH */
127 BIGNUM *q;
128 BIGNUM *j;
129 unsigned char *seed;
130 int seedlen;
131 BIGNUM *counter;
132
133 int references;
134 CRYPTO_EX_DATA ex_data;
135 DH_METHOD *meth;
136 };
137
138 #define DH_GENERATOR_2 2
139 /* #define DH_GENERATOR_3 3 */
140 #define DH_GENERATOR_5 5
141
142 /* DH_check error codes */
143 #define DH_CHECK_P_NOT_PRIME 0x01
144 #define DH_CHECK_P_NOT_SAFE_PRIME 0x02
145 #define DH_UNABLE_TO_CHECK_GENERATOR 0x04
146 #define DH_NOT_SUITABLE_GENERATOR 0x08
147
148 /* primes p where (p-1)/2 is prime too are called "safe"; we define
149 this for backward compatibility: */
150 #define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
151
152 #define DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \
153 (char *(*)())d2i_DHparams,(char *)(x))
154 #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
155 (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
156 #define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
157 (unsigned char *)(x))
158 #define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \
159 (char *(*)())d2i_DHparams,(bp),(unsigned char **)(x))
160 #ifdef __cplusplus
161 #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \
162 (unsigned char *)(x))
163 #else
164 #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \
165 (unsigned char *)(x))
166 #endif
167
168 DH_METHOD *DH_OpenSSL(void);
169
170 void DH_set_default_method(DH_METHOD *meth);
171 DH_METHOD *DH_get_default_method(void);
172 DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth);
173 DH *DH_new_method(DH_METHOD *meth);
174
175 DH * DH_new(void);
176 void DH_free(DH *dh);
177 int DH_size(DH *dh);
178 int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
179 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
180 int DH_set_ex_data(DH *d, int idx, void *arg);
181 void *DH_get_ex_data(DH *d, int idx);
182 DH * DH_generate_parameters(int prime_len,int generator,
183 void (*callback)(int,int,void *),void *cb_arg);
184 int DH_check(DH *dh,int *codes);
185 int DH_generate_key(DH *dh);
186 int DH_compute_key(unsigned char *key,BIGNUM *pub_key,DH *dh);
187 DH * d2i_DHparams(DH **a,unsigned char **pp, long length);
188 int i2d_DHparams(DH *a,unsigned char **pp);
189 #ifndef NO_FP_API
190 int DHparams_print_fp(FILE *fp, DH *x);
191 #endif
192 #ifndef NO_BIO
193 int DHparams_print(BIO *bp, DH *x);
194 #else
195 int DHparams_print(char *bp, DH *x);
196 #endif
197 void ERR_load_DH_strings(void );
198
199 /* BEGIN ERROR CODES */
200 /* The following lines are auto generated by the script mkerr.pl. Any changes
201 * made after this point may be overwritten when the script is next run.
202 */
203
204 /* Error codes for the DH functions. */
205
206 /* Function codes. */
207 #define DH_F_DHPARAMS_PRINT 100
208 #define DH_F_DHPARAMS_PRINT_FP 101
209 #define DH_F_DH_COMPUTE_KEY 102
210 #define DH_F_DH_GENERATE_KEY 103
211 #define DH_F_DH_GENERATE_PARAMETERS 104
212 #define DH_F_DH_NEW 105
213
214 /* Reason codes. */
215 #define DH_R_NO_PRIVATE_VALUE 100
216
217 #ifdef __cplusplus
218 }
219 #endif
220 #endif
221