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d02b48c6 | 1 | /* crypto/dh/dh.h */ |
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 | #ifndef HEADER_DH_H | |
60 | #define HEADER_DH_H | |
61 | ||
cf1b7d96 | 62 | #ifdef OPENSSL_NO_DH |
f5d7a031 UM |
63 | #error DH is disabled. |
64 | #endif | |
65 | ||
cf1b7d96 | 66 | #ifndef OPENSSL_NO_BIO |
ef33b970 RL |
67 | #include <openssl/bio.h> |
68 | #endif | |
ec577822 | 69 | #include <openssl/bn.h> |
13066cee | 70 | #include <openssl/crypto.h> |
2aa9043a | 71 | #include <openssl/ossl_typ.h> |
2fb50a29 | 72 | |
dfeab068 RE |
73 | #define DH_FLAG_CACHE_MONT_P 0x01 |
74 | ||
82271cee RL |
75 | #ifdef __cplusplus |
76 | extern "C" { | |
77 | #endif | |
78 | ||
13066cee DSH |
79 | typedef struct dh_st DH; |
80 | ||
81 | typedef struct dh_method { | |
82 | const char *name; | |
83 | /* Methods here */ | |
84 | int (*generate_key)(DH *dh); | |
f971ccb2 RL |
85 | int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh); |
86 | int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a, | |
87 | const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, | |
13066cee DSH |
88 | BN_MONT_CTX *m_ctx); /* Can be null */ |
89 | ||
90 | int (*init)(DH *dh); | |
91 | int (*finish)(DH *dh); | |
92 | int flags; | |
93 | char *app_data; | |
0e4aa0d2 GT |
94 | /* If this is non-NULL, it will be used to generate parameters */ |
95 | int (*generate_params)(DH *dh, int prime_len, int generator, BN_GENCB *cb); | |
13066cee DSH |
96 | } DH_METHOD; |
97 | ||
98 | struct dh_st | |
d02b48c6 RE |
99 | { |
100 | /* This first argument is used to pick up errors when | |
101 | * a DH is passed instead of a EVP_PKEY */ | |
102 | int pad; | |
103 | int version; | |
104 | BIGNUM *p; | |
105 | BIGNUM *g; | |
2c2f9e2c | 106 | long length; /* optional */ |
4486d0cd | 107 | BIGNUM *pub_key; /* g^x */ |
d02b48c6 | 108 | BIGNUM *priv_key; /* x */ |
dfeab068 RE |
109 | |
110 | int flags; | |
111 | char *method_mont_p; | |
13066cee DSH |
112 | /* Place holders if we want to do X9.42 DH */ |
113 | BIGNUM *q; | |
114 | BIGNUM *j; | |
90644dd7 | 115 | unsigned char *seed; |
13066cee DSH |
116 | int seedlen; |
117 | BIGNUM *counter; | |
118 | ||
119 | int references; | |
120 | CRYPTO_EX_DATA ex_data; | |
cb78486d GT |
121 | const DH_METHOD *meth; |
122 | ENGINE *engine; | |
13066cee | 123 | }; |
d02b48c6 RE |
124 | |
125 | #define DH_GENERATOR_2 2 | |
126 | /* #define DH_GENERATOR_3 3 */ | |
127 | #define DH_GENERATOR_5 5 | |
128 | ||
129 | /* DH_check error codes */ | |
130 | #define DH_CHECK_P_NOT_PRIME 0x01 | |
4486d0cd | 131 | #define DH_CHECK_P_NOT_SAFE_PRIME 0x02 |
d02b48c6 RE |
132 | #define DH_UNABLE_TO_CHECK_GENERATOR 0x04 |
133 | #define DH_NOT_SUITABLE_GENERATOR 0x08 | |
134 | ||
4486d0cd UM |
135 | /* primes p where (p-1)/2 is prime too are called "safe"; we define |
136 | this for backward compatibility: */ | |
137 | #define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME | |
138 | ||
d02b48c6 RE |
139 | #define DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \ |
140 | (char *(*)())d2i_DHparams,(char *)(x)) | |
141 | #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \ | |
142 | (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x)) | |
143 | #define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \ | |
144 | (unsigned char *)(x)) | |
145 | #define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \ | |
146 | (char *(*)())d2i_DHparams,(bp),(unsigned char **)(x)) | |
72fbe87d BL |
147 | #ifdef __cplusplus |
148 | #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \ | |
149 | (unsigned char *)(x)) | |
150 | #else | |
d02b48c6 RE |
151 | #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \ |
152 | (unsigned char *)(x)) | |
72fbe87d | 153 | #endif |
d02b48c6 | 154 | |
f971ccb2 | 155 | const DH_METHOD *DH_OpenSSL(void); |
13066cee | 156 | |
cb78486d GT |
157 | void DH_set_default_method(const DH_METHOD *meth); |
158 | const DH_METHOD *DH_get_default_method(void); | |
159 | int DH_set_method(DH *dh, const DH_METHOD *meth); | |
160 | DH *DH_new_method(ENGINE *engine); | |
13066cee | 161 | |
d02b48c6 RE |
162 | DH * DH_new(void); |
163 | void DH_free(DH *dh); | |
dc2a33d6 | 164 | int DH_up_ref(DH *dh); |
f971ccb2 | 165 | int DH_size(const DH *dh); |
dd9d233e DSH |
166 | int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
167 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); | |
168 | int DH_set_ex_data(DH *d, int idx, void *arg); | |
169 | void *DH_get_ex_data(DH *d, int idx); | |
e9224c71 GT |
170 | |
171 | /* Deprecated version */ | |
172 | #ifndef OPENSSL_NO_DEPRECATED | |
d02b48c6 | 173 | DH * DH_generate_parameters(int prime_len,int generator, |
b4f76582 | 174 | void (*callback)(int,int,void *),void *cb_arg); |
e9224c71 GT |
175 | #endif /* !defined(OPENSSL_NO_DEPRECATED) */ |
176 | ||
177 | /* New version */ | |
178 | int DH_generate_parameters_ex(DH *dh, int prime_len,int generator, BN_GENCB *cb); | |
179 | ||
f971ccb2 | 180 | int DH_check(const DH *dh,int *codes); |
d02b48c6 | 181 | int DH_generate_key(DH *dh); |
f971ccb2 RL |
182 | int DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh); |
183 | DH * d2i_DHparams(DH **a,const unsigned char **pp, long length); | |
184 | int i2d_DHparams(const DH *a,unsigned char **pp); | |
cf1b7d96 | 185 | #ifndef OPENSSL_NO_FP_API |
f971ccb2 | 186 | int DHparams_print_fp(FILE *fp, const DH *x); |
d02b48c6 | 187 | #endif |
cf1b7d96 | 188 | #ifndef OPENSSL_NO_BIO |
f971ccb2 | 189 | int DHparams_print(BIO *bp, const DH *x); |
d02b48c6 | 190 | #else |
f971ccb2 | 191 | int DHparams_print(char *bp, const DH *x); |
d02b48c6 | 192 | #endif |
d02b48c6 | 193 | |
d02b48c6 | 194 | /* BEGIN ERROR CODES */ |
6d311938 DSH |
195 | /* The following lines are auto generated by the script mkerr.pl. Any changes |
196 | * made after this point may be overwritten when the script is next run. | |
197 | */ | |
b476df64 | 198 | void ERR_load_DH_strings(void); |
6d311938 | 199 | |
d02b48c6 RE |
200 | /* Error codes for the DH functions. */ |
201 | ||
202 | /* Function codes. */ | |
203 | #define DH_F_DHPARAMS_PRINT 100 | |
204 | #define DH_F_DHPARAMS_PRINT_FP 101 | |
205 | #define DH_F_DH_COMPUTE_KEY 102 | |
206 | #define DH_F_DH_GENERATE_KEY 103 | |
207 | #define DH_F_DH_GENERATE_PARAMETERS 104 | |
0c372b94 | 208 | #define DH_F_DH_NEW_METHOD 105 |
d02b48c6 RE |
209 | |
210 | /* Reason codes. */ | |
82652aaf | 211 | #define DH_R_BAD_GENERATOR 101 |
d02b48c6 | 212 | #define DH_R_NO_PRIVATE_VALUE 100 |
6d311938 | 213 | |
d02b48c6 RE |
214 | #ifdef __cplusplus |
215 | } | |
216 | #endif | |
217 | #endif |