2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
67 #error DH is disabled.
70 #include <openssl/bn.h>
71 #include <openssl/crypto.h>
73 #define DH_FLAG_CACHE_MONT_P 0x01
75 typedef struct dh_st DH;
77 typedef struct dh_method {
80 int (*generate_key)(DH *dh);
81 int (*compute_key)(unsigned char *key,BIGNUM *pub_key,DH *dh);
82 int (*bn_mod_exp)(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
83 const BIGNUM *m, BN_CTX *ctx,
84 BN_MONT_CTX *m_ctx); /* Can be null */
87 int (*finish)(DH *dh);
94 /* This first argument is used to pick up errors when
95 * a DH is passed instead of a EVP_PKEY */
100 int length; /* optional */
101 BIGNUM *pub_key; /* g^x */
102 BIGNUM *priv_key; /* x */
106 /* Place holders if we want to do X9.42 DH */
114 CRYPTO_EX_DATA ex_data;
118 #define DH_GENERATOR_2 2
119 /* #define DH_GENERATOR_3 3 */
120 #define DH_GENERATOR_5 5
122 /* DH_check error codes */
123 #define DH_CHECK_P_NOT_PRIME 0x01
124 #define DH_CHECK_P_NOT_SAFE_PRIME 0x02
125 #define DH_UNABLE_TO_CHECK_GENERATOR 0x04
126 #define DH_NOT_SUITABLE_GENERATOR 0x08
128 /* primes p where (p-1)/2 is prime too are called "safe"; we define
129 this for backward compatibility: */
130 #define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
132 #define DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \
133 (char *(*)())d2i_DHparams,(char *)(x))
134 #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
135 (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
136 #define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
137 (unsigned char *)(x))
138 #define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \
139 (char *(*)())d2i_DHparams,(bp),(unsigned char **)(x))
141 #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \
142 (unsigned char *)(x))
144 #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \
145 (unsigned char *)(x))
148 DH_METHOD *DH_OpenSSL(void);
150 void DH_set_default_method(DH_METHOD *meth);
151 DH_METHOD *DH_get_default_method(void);
152 DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth);
153 DH *DH_new_method(DH_METHOD *meth);
156 void DH_free(DH *dh);
158 int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
159 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
160 int DH_set_ex_data(DH *d, int idx, void *arg);
161 void *DH_get_ex_data(DH *d, int idx);
162 DH * DH_generate_parameters(int prime_len,int generator,
163 void (*callback)(int,int,void *),void *cb_arg);
164 int DH_check(DH *dh,int *codes);
165 int DH_generate_key(DH *dh);
166 int DH_compute_key(unsigned char *key,BIGNUM *pub_key,DH *dh);
167 DH * d2i_DHparams(DH **a,unsigned char **pp, long length);
168 int i2d_DHparams(DH *a,unsigned char **pp);
170 int DHparams_print_fp(FILE *fp, DH *x);
173 int DHparams_print(BIO *bp, DH *x);
175 int DHparams_print(char *bp, DH *x);
177 void ERR_load_DH_strings(void );
179 /* BEGIN ERROR CODES */
180 /* The following lines are auto generated by the script mkerr.pl. Any changes
181 * made after this point may be overwritten when the script is next run.
184 /* Error codes for the DH functions. */
186 /* Function codes. */
187 #define DH_F_DHPARAMS_PRINT 100
188 #define DH_F_DHPARAMS_PRINT_FP 101
189 #define DH_F_DH_COMPUTE_KEY 102
190 #define DH_F_DH_GENERATE_KEY 103
191 #define DH_F_DH_GENERATE_PARAMETERS 104
192 #define DH_F_DH_NEW 105
195 #define DH_R_NO_PRIVATE_VALUE 100