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1 | /* crypto/dh/dh.h */ | |
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 | #ifndef HEADER_DH_H | |
60 | #define HEADER_DH_H | |
61 | ||
62 | #include <openssl/e_os2.h> | |
63 | ||
64 | #ifdef OPENSSL_NO_DH | |
65 | #error DH is disabled. | |
66 | #endif | |
67 | ||
68 | #ifndef OPENSSL_NO_BIO | |
69 | #include <openssl/bio.h> | |
70 | #endif | |
71 | #include <openssl/ossl_typ.h> | |
72 | #ifndef OPENSSL_NO_DEPRECATED | |
73 | #include <openssl/bn.h> | |
74 | #endif | |
75 | ||
76 | #ifndef OPENSSL_DH_MAX_MODULUS_BITS | |
77 | # define OPENSSL_DH_MAX_MODULUS_BITS 10000 | |
78 | #endif | |
79 | ||
80 | #define DH_FLAG_CACHE_MONT_P 0x01 | |
81 | #define DH_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DH | |
82 | * implementation now uses constant time | |
83 | * modular exponentiation for secret exponents | |
84 | * by default. This flag causes the | |
85 | * faster variable sliding window method to | |
86 | * be used for all exponents. | |
87 | */ | |
88 | ||
89 | #ifdef __cplusplus | |
90 | extern "C" { | |
91 | #endif | |
92 | ||
93 | /* Already defined in ossl_typ.h */ | |
94 | /* typedef struct dh_st DH; */ | |
95 | /* typedef struct dh_method DH_METHOD; */ | |
96 | ||
97 | struct dh_method | |
98 | { | |
99 | const char *name; | |
100 | /* Methods here */ | |
101 | int (*generate_key)(DH *dh); | |
102 | int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh); | |
103 | int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a, | |
104 | const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, | |
105 | BN_MONT_CTX *m_ctx); /* Can be null */ | |
106 | ||
107 | int (*init)(DH *dh); | |
108 | int (*finish)(DH *dh); | |
109 | int flags; | |
110 | char *app_data; | |
111 | /* If this is non-NULL, it will be used to generate parameters */ | |
112 | int (*generate_params)(DH *dh, int prime_len, int generator, BN_GENCB *cb); | |
113 | }; | |
114 | ||
115 | struct dh_st | |
116 | { | |
117 | /* This first argument is used to pick up errors when | |
118 | * a DH is passed instead of a EVP_PKEY */ | |
119 | int pad; | |
120 | int version; | |
121 | BIGNUM *p; | |
122 | BIGNUM *g; | |
123 | long length; /* optional */ | |
124 | BIGNUM *pub_key; /* g^x */ | |
125 | BIGNUM *priv_key; /* x */ | |
126 | ||
127 | int flags; | |
128 | BN_MONT_CTX *method_mont_p; | |
129 | /* Place holders if we want to do X9.42 DH */ | |
130 | BIGNUM *q; | |
131 | BIGNUM *j; | |
132 | unsigned char *seed; | |
133 | int seedlen; | |
134 | BIGNUM *counter; | |
135 | ||
136 | int references; | |
137 | CRYPTO_EX_DATA ex_data; | |
138 | const DH_METHOD *meth; | |
139 | ENGINE *engine; | |
140 | }; | |
141 | ||
142 | #define DH_GENERATOR_2 2 | |
143 | /* #define DH_GENERATOR_3 3 */ | |
144 | #define DH_GENERATOR_5 5 | |
145 | ||
146 | /* DH_check error codes */ | |
147 | #define DH_CHECK_P_NOT_PRIME 0x01 | |
148 | #define DH_CHECK_P_NOT_SAFE_PRIME 0x02 | |
149 | #define DH_UNABLE_TO_CHECK_GENERATOR 0x04 | |
150 | #define DH_NOT_SUITABLE_GENERATOR 0x08 | |
151 | ||
152 | /* DH_check_pub_key error codes */ | |
153 | #define DH_CHECK_PUBKEY_TOO_SMALL 0x01 | |
154 | #define DH_CHECK_PUBKEY_TOO_LARGE 0x02 | |
155 | ||
156 | /* primes p where (p-1)/2 is prime too are called "safe"; we define | |
157 | this for backward compatibility: */ | |
158 | #define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME | |
159 | ||
160 | #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \ | |
161 | (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x)) | |
162 | #define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \ | |
163 | (unsigned char *)(x)) | |
164 | #define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x) | |
165 | #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x) | |
166 | ||
167 | DH *DHparams_dup(DH *); | |
168 | ||
169 | const DH_METHOD *DH_OpenSSL(void); | |
170 | ||
171 | void DH_set_default_method(const DH_METHOD *meth); | |
172 | const DH_METHOD *DH_get_default_method(void); | |
173 | int DH_set_method(DH *dh, const DH_METHOD *meth); | |
174 | DH *DH_new_method(ENGINE *engine); | |
175 | ||
176 | DH * DH_new(void); | |
177 | void DH_free(DH *dh); | |
178 | int DH_up_ref(DH *dh); | |
179 | int DH_size(const DH *dh); | |
180 | int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, | |
181 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); | |
182 | int DH_set_ex_data(DH *d, int idx, void *arg); | |
183 | void *DH_get_ex_data(DH *d, int idx); | |
184 | ||
185 | /* Deprecated version */ | |
186 | #ifndef OPENSSL_NO_DEPRECATED | |
187 | DH * DH_generate_parameters(int prime_len,int generator, | |
188 | void (*callback)(int,int,void *),void *cb_arg); | |
189 | #endif /* !defined(OPENSSL_NO_DEPRECATED) */ | |
190 | ||
191 | /* New version */ | |
192 | int DH_generate_parameters_ex(DH *dh, int prime_len,int generator, BN_GENCB *cb); | |
193 | ||
194 | int DH_check(const DH *dh,int *codes); | |
195 | int DH_check_pub_key(const DH *dh,const BIGNUM *pub_key, int *codes); | |
196 | int DH_generate_key(DH *dh); | |
197 | int DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh); | |
198 | DH * d2i_DHparams(DH **a,const unsigned char **pp, long length); | |
199 | int i2d_DHparams(const DH *a,unsigned char **pp); | |
200 | #ifndef OPENSSL_NO_FP_API | |
201 | int DHparams_print_fp(FILE *fp, const DH *x); | |
202 | #endif | |
203 | #ifndef OPENSSL_NO_BIO | |
204 | int DHparams_print(BIO *bp, const DH *x); | |
205 | #else | |
206 | int DHparams_print(char *bp, const DH *x); | |
207 | #endif | |
208 | ||
209 | #define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \ | |
210 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \ | |
211 | EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, len, NULL) | |
212 | ||
213 | #define EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, gen) \ | |
214 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \ | |
215 | EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL) | |
216 | ||
217 | #define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN (EVP_PKEY_ALG_CTRL + 1) | |
218 | #define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR (EVP_PKEY_ALG_CTRL + 2) | |
219 | ||
220 | ||
221 | /* BEGIN ERROR CODES */ | |
222 | /* The following lines are auto generated by the script mkerr.pl. Any changes | |
223 | * made after this point may be overwritten when the script is next run. | |
224 | */ | |
225 | void ERR_load_DH_strings(void); | |
226 | ||
227 | /* Error codes for the DH functions. */ | |
228 | ||
229 | /* Function codes. */ | |
230 | #define DH_F_COMPUTE_KEY 102 | |
231 | #define DH_F_DHPARAMS_PRINT_FP 101 | |
232 | #define DH_F_DH_BUILTIN_GENPARAMS 106 | |
233 | #define DH_F_DH_NEW_METHOD 105 | |
234 | #define DH_F_DH_PARAM_DECODE 107 | |
235 | #define DH_F_DH_PRIV_DECODE 110 | |
236 | #define DH_F_DH_PRIV_ENCODE 111 | |
237 | #define DH_F_DH_PUB_DECODE 108 | |
238 | #define DH_F_DH_PUB_ENCODE 109 | |
239 | #define DH_F_DO_DH_PRINT 100 | |
240 | #define DH_F_GENERATE_KEY 103 | |
241 | #define DH_F_GENERATE_PARAMETERS 104 | |
242 | #define DH_F_PKEY_DH_DERIVE 112 | |
243 | #define DH_F_PKEY_DH_KEYGEN 113 | |
244 | ||
245 | /* Reason codes. */ | |
246 | #define DH_R_BAD_GENERATOR 101 | |
247 | #define DH_R_BN_DECODE_ERROR 109 | |
248 | #define DH_R_BN_ERROR 106 | |
249 | #define DH_R_DECODE_ERROR 104 | |
250 | #define DH_R_INVALID_PUBKEY 102 | |
251 | #define DH_R_KEYS_NOT_SET 108 | |
252 | #define DH_R_MODULUS_TOO_LARGE 103 | |
253 | #define DH_R_NO_PARAMETERS_SET 107 | |
254 | #define DH_R_NO_PRIVATE_VALUE 100 | |
255 | #define DH_R_PARAMETER_ENCODING_ERROR 105 | |
256 | ||
257 | #ifdef __cplusplus | |
258 | } | |
259 | #endif | |
260 | #endif |