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d02b48c6 | 1 | /* crypto/dsa/dsa.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 | /* | |
60 | * The DSS routines are based on patches supplied by | |
61 | * Steven Schoch <schoch@sheba.arc.nasa.gov>. He basically did the | |
62 | * work and I have just tweaked them a little to fit into my | |
63 | * stylistic vision for SSLeay :-) */ | |
64 | ||
65 | #ifndef HEADER_DSA_H | |
66 | #define HEADER_DSA_H | |
67 | ||
751ff1d3 RL |
68 | #include <openssl/e_os2.h> |
69 | ||
cf1b7d96 | 70 | #ifdef OPENSSL_NO_DSA |
f5d7a031 UM |
71 | #error DSA is disabled. |
72 | #endif | |
73 | ||
cf1b7d96 | 74 | #ifndef OPENSSL_NO_BIO |
ef33b970 RL |
75 | #include <openssl/bio.h> |
76 | #endif | |
c0711f7f | 77 | #include <openssl/crypto.h> |
2aa9043a | 78 | #include <openssl/ossl_typ.h> |
60a938c6 GT |
79 | |
80 | #ifndef OPENSSL_NO_DEPRECATED | |
0f814687 | 81 | #include <openssl/bn.h> |
cf1b7d96 | 82 | #ifndef OPENSSL_NO_DH |
48c843c3 BM |
83 | # include <openssl/dh.h> |
84 | #endif | |
60a938c6 | 85 | #endif |
d02b48c6 | 86 | |
5e3225cc BM |
87 | #ifndef OPENSSL_DSA_MAX_MODULUS_BITS |
88 | # define OPENSSL_DSA_MAX_MODULUS_BITS 10000 | |
89 | #endif | |
90 | ||
dfeab068 | 91 | #define DSA_FLAG_CACHE_MONT_P 0x01 |
46a64376 BM |
92 | #define DSA_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DSA |
93 | * implementation now uses constant time | |
94 | * modular exponentiation for secret exponents | |
95 | * by default. This flag causes the | |
96 | * faster variable sliding window method to | |
97 | * be used for all exponents. | |
98 | */ | |
dfeab068 | 99 | |
82271cee RL |
100 | #ifdef __cplusplus |
101 | extern "C" { | |
102 | #endif | |
103 | ||
3a87a9b9 GT |
104 | /* Already defined in ossl_typ.h */ |
105 | /* typedef struct dsa_st DSA; */ | |
106 | /* typedef struct dsa_method DSA_METHOD; */ | |
c0711f7f DSH |
107 | |
108 | typedef struct DSA_SIG_st | |
109 | { | |
110 | BIGNUM *r; | |
111 | BIGNUM *s; | |
112 | } DSA_SIG; | |
113 | ||
3a87a9b9 GT |
114 | struct dsa_method |
115 | { | |
c0711f7f DSH |
116 | const char *name; |
117 | DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa); | |
118 | int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, | |
119 | BIGNUM **rp); | |
120 | int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len, | |
84948b39 | 121 | DSA_SIG *sig, DSA *dsa); |
c0711f7f DSH |
122 | int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, |
123 | BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, | |
124 | BN_MONT_CTX *in_mont); | |
125 | int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, | |
126 | const BIGNUM *m, BN_CTX *ctx, | |
127 | BN_MONT_CTX *m_ctx); /* Can be null */ | |
128 | int (*init)(DSA *dsa); | |
129 | int (*finish)(DSA *dsa); | |
130 | int flags; | |
131 | char *app_data; | |
0e4aa0d2 GT |
132 | /* If this is non-NULL, it is used to generate DSA parameters */ |
133 | int (*dsa_paramgen)(DSA *dsa, int bits, | |
1457619e | 134 | const unsigned char *seed, int seed_len, |
0e4aa0d2 GT |
135 | int *counter_ret, unsigned long *h_ret, |
136 | BN_GENCB *cb); | |
137 | /* If this is non-NULL, it is used to generate DSA keys */ | |
138 | int (*dsa_keygen)(DSA *dsa); | |
3a87a9b9 | 139 | }; |
c0711f7f DSH |
140 | |
141 | struct dsa_st | |
d02b48c6 RE |
142 | { |
143 | /* This first variable is used to pick up errors where | |
144 | * a DSA is passed instead of of a EVP_PKEY */ | |
145 | int pad; | |
2c2f9e2c | 146 | long version; |
d02b48c6 RE |
147 | int write_params; |
148 | BIGNUM *p; | |
149 | BIGNUM *q; /* == 20 */ | |
150 | BIGNUM *g; | |
151 | ||
152 | BIGNUM *pub_key; /* y public key */ | |
153 | BIGNUM *priv_key; /* x private key */ | |
154 | ||
155 | BIGNUM *kinv; /* Signing pre-calc */ | |
156 | BIGNUM *r; /* Signing pre-calc */ | |
157 | ||
dfeab068 RE |
158 | int flags; |
159 | /* Normally used to cache montgomery values */ | |
879b1980 | 160 | BN_MONT_CTX *method_mont_p; |
d02b48c6 | 161 | int references; |
c0711f7f | 162 | CRYPTO_EX_DATA ex_data; |
cb78486d GT |
163 | const DSA_METHOD *meth; |
164 | /* functional reference if 'meth' is ENGINE-provided */ | |
165 | ENGINE *engine; | |
c0711f7f | 166 | }; |
a8da8918 | 167 | |
d02b48c6 RE |
168 | #define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \ |
169 | (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x)) | |
170 | #define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \ | |
171 | (unsigned char *)(x)) | |
41a15c4f BL |
172 | #define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x) |
173 | #define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x) | |
d02b48c6 | 174 | |
d02b48c6 | 175 | |
f4274da1 | 176 | DSA *DSAparams_dup(DSA *x); |
a8da8918 UM |
177 | DSA_SIG * DSA_SIG_new(void); |
178 | void DSA_SIG_free(DSA_SIG *a); | |
a4aba800 | 179 | int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp); |
6343829a | 180 | DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length); |
a8da8918 | 181 | |
61f5b6f3 BL |
182 | DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa); |
183 | int DSA_do_verify(const unsigned char *dgst,int dgst_len, | |
184 | DSA_SIG *sig,DSA *dsa); | |
a8da8918 | 185 | |
a4aba800 | 186 | const DSA_METHOD *DSA_OpenSSL(void); |
c0711f7f | 187 | |
cb78486d GT |
188 | void DSA_set_default_method(const DSA_METHOD *); |
189 | const DSA_METHOD *DSA_get_default_method(void); | |
190 | int DSA_set_method(DSA *dsa, const DSA_METHOD *); | |
f8463356 | 191 | |
d02b48c6 | 192 | DSA * DSA_new(void); |
cb78486d | 193 | DSA * DSA_new_method(ENGINE *engine); |
5cbc2e8b GT |
194 | void DSA_free (DSA *r); |
195 | /* "up" the DSA object's reference count */ | |
6ac4e8bd | 196 | int DSA_up_ref(DSA *r); |
a4aba800 | 197 | int DSA_size(const DSA *); |
d02b48c6 RE |
198 | /* next 4 return -1 on error */ |
199 | int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp); | |
61f5b6f3 | 200 | int DSA_sign(int type,const unsigned char *dgst,int dlen, |
d02b48c6 | 201 | unsigned char *sig, unsigned int *siglen, DSA *dsa); |
61f5b6f3 | 202 | int DSA_verify(int type,const unsigned char *dgst,int dgst_len, |
a4aba800 | 203 | const unsigned char *sigbuf, int siglen, DSA *dsa); |
dd9d233e DSH |
204 | int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
205 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); | |
206 | int DSA_set_ex_data(DSA *d, int idx, void *arg); | |
207 | void *DSA_get_ex_data(DSA *d, int idx); | |
d02b48c6 | 208 | |
6343829a GT |
209 | DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length); |
210 | DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length); | |
211 | DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length); | |
e9224c71 GT |
212 | |
213 | /* Deprecated version */ | |
214 | #ifndef OPENSSL_NO_DEPRECATED | |
a4aba800 RL |
215 | DSA * DSA_generate_parameters(int bits, |
216 | unsigned char *seed,int seed_len, | |
58964a49 | 217 | int *counter_ret, unsigned long *h_ret,void |
82fc1d9c | 218 | (*callback)(int, int, void *),void *cb_arg); |
e9224c71 GT |
219 | #endif /* !defined(OPENSSL_NO_DEPRECATED) */ |
220 | ||
221 | /* New version */ | |
222 | int DSA_generate_parameters_ex(DSA *dsa, int bits, | |
1457619e | 223 | const unsigned char *seed,int seed_len, |
e9224c71 GT |
224 | int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); |
225 | ||
d02b48c6 | 226 | int DSA_generate_key(DSA *a); |
a4aba800 RL |
227 | int i2d_DSAPublicKey(const DSA *a, unsigned char **pp); |
228 | int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp); | |
229 | int i2d_DSAparams(const DSA *a,unsigned char **pp); | |
d02b48c6 | 230 | |
cf1b7d96 | 231 | #ifndef OPENSSL_NO_BIO |
a4aba800 RL |
232 | int DSAparams_print(BIO *bp, const DSA *x); |
233 | int DSA_print(BIO *bp, const DSA *x, int off); | |
d02b48c6 | 234 | #endif |
cf1b7d96 | 235 | #ifndef OPENSSL_NO_FP_API |
a4aba800 RL |
236 | int DSAparams_print_fp(FILE *fp, const DSA *x); |
237 | int DSA_print_fp(FILE *bp, const DSA *x, int off); | |
d02b48c6 RE |
238 | #endif |
239 | ||
a87030a1 BM |
240 | #define DSS_prime_checks 50 |
241 | /* Primality test according to FIPS PUB 186[-1], Appendix 2.1: | |
242 | * 50 rounds of Rabin-Miller */ | |
243 | #define DSA_is_prime(n, callback, cb_arg) \ | |
244 | BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg) | |
d02b48c6 | 245 | |
cf1b7d96 | 246 | #ifndef OPENSSL_NO_DH |
48c843c3 BM |
247 | /* Convert DSA structure (key or just parameters) into DH structure |
248 | * (be careful to avoid small subgroup attacks when using this!) */ | |
a4aba800 | 249 | DH *DSA_dup_DH(const DSA *r); |
48c843c3 BM |
250 | #endif |
251 | ||
c927df3f DSH |
252 | #define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \ |
253 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \ | |
254 | EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL) | |
255 | ||
256 | #define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS (EVP_PKEY_ALG_CTRL + 1) | |
357d5de5 NL |
257 | #define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS (EVP_PKEY_ALG_CTRL + 2) |
258 | #define EVP_PKEY_CTRL_DSA_PARAMGEN_MD (EVP_PKEY_ALG_CTRL + 3) | |
c927df3f | 259 | |
d02b48c6 | 260 | /* BEGIN ERROR CODES */ |
6d311938 DSH |
261 | /* The following lines are auto generated by the script mkerr.pl. Any changes |
262 | * made after this point may be overwritten when the script is next run. | |
263 | */ | |
c962479b | 264 | void ERR_load_DSA_strings(void); |
6d311938 | 265 | |
d02b48c6 RE |
266 | /* Error codes for the DSA functions. */ |
267 | ||
268 | /* Function codes. */ | |
6d311938 | 269 | #define DSA_F_D2I_DSA_SIG 110 |
5c95c2ac | 270 | #define DSA_F_DO_DSA_PRINT 104 |
d02b48c6 RE |
271 | #define DSA_F_DSAPARAMS_PRINT 100 |
272 | #define DSA_F_DSAPARAMS_PRINT_FP 101 | |
6d311938 DSH |
273 | #define DSA_F_DSA_DO_SIGN 112 |
274 | #define DSA_F_DSA_DO_VERIFY 113 | |
0c372b94 | 275 | #define DSA_F_DSA_NEW_METHOD 103 |
3e4585c8 | 276 | #define DSA_F_DSA_PARAM_DECODE 119 |
d02b48c6 | 277 | #define DSA_F_DSA_PRINT_FP 105 |
448be743 DSH |
278 | #define DSA_F_DSA_PRIV_DECODE 115 |
279 | #define DSA_F_DSA_PRIV_ENCODE 116 | |
280 | #define DSA_F_DSA_PUB_DECODE 117 | |
281 | #define DSA_F_DSA_PUB_ENCODE 118 | |
d02b48c6 RE |
282 | #define DSA_F_DSA_SIGN 106 |
283 | #define DSA_F_DSA_SIGN_SETUP 107 | |
a8da8918 | 284 | #define DSA_F_DSA_SIG_NEW 109 |
6d311938 | 285 | #define DSA_F_DSA_VERIFY 108 |
a8da8918 | 286 | #define DSA_F_I2D_DSA_SIG 111 |
5c95c2ac | 287 | #define DSA_F_OLD_DSA_PRIV_DECODE 122 |
c927df3f | 288 | #define DSA_F_PKEY_DSA_CTRL 120 |
75ef7188 | 289 | #define DSA_F_PKEY_DSA_KEYGEN 121 |
9d6b1ce6 | 290 | #define DSA_F_SIG_CB 114 |
d02b48c6 RE |
291 | |
292 | /* Reason codes. */ | |
5e3225cc BM |
293 | #define DSA_R_BAD_Q_VALUE 102 |
294 | #define DSA_R_BN_DECODE_ERROR 108 | |
295 | #define DSA_R_BN_ERROR 109 | |
d02b48c6 | 296 | #define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100 |
448be743 | 297 | #define DSA_R_DECODE_ERROR 104 |
c927df3f | 298 | #define DSA_R_INVALID_DIGEST_TYPE 106 |
c962479b | 299 | #define DSA_R_MISSING_PARAMETERS 101 |
5e3225cc | 300 | #define DSA_R_MODULUS_TOO_LARGE 103 |
75ef7188 | 301 | #define DSA_R_NO_PARAMETERS_SET 107 |
448be743 | 302 | #define DSA_R_PARAMETER_ENCODING_ERROR 105 |
6d311938 | 303 | |
d02b48c6 RE |
304 | #ifdef __cplusplus |
305 | } | |
306 | #endif | |
307 | #endif |