1 /* crypto/dsa/dsa.h */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 (at) 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 68 #include <openssl/e_os2.h> 69 70 #ifdef OPENSSL_NO_DSA 71 #error DSA is disabled. 72 #endif 73 74 #ifndef OPENSSL_NO_BIO 75 #include <openssl/bio.h> 76 #endif 77 #include <openssl/crypto.h> 78 #include <openssl/ossl_typ.h> 79 80 #ifndef OPENSSL_NO_DEPRECATED 81 #include <openssl/bn.h> 82 #ifndef OPENSSL_NO_DH 83 # include <openssl/dh.h> 84 #endif 85 #endif 86 87 #ifndef OPENSSL_DSA_MAX_MODULUS_BITS 88 # define OPENSSL_DSA_MAX_MODULUS_BITS 10000 89 #endif 90 91 #define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024 92 93 #define DSA_FLAG_CACHE_MONT_P 0x01 94 #define DSA_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DSA 95 * implementation now uses constant time 96 * modular exponentiation for secret exponents 97 * by default. This flag causes the 98 * faster variable sliding window method to 99 * be used for all exponents. 100 */ 101 102 /* If this flag is set the DSA method is FIPS compliant and can be used 103 * in FIPS mode. This is set in the validated module method. If an 104 * application sets this flag in its own methods it is its reposibility 105 * to ensure the result is compliant. 106 */ 107 108 #define DSA_FLAG_FIPS_METHOD 0x0400 109 110 /* If this flag is set the operations normally disabled in FIPS mode are 111 * permitted it is then the applications responsibility to ensure that the 112 * usage is compliant. 113 */ 114 115 #define DSA_FLAG_NON_FIPS_ALLOW 0x0400 116 117 #ifdef OPENSSL_FIPS 118 #define FIPS_DSA_SIZE_T int 119 #endif 120 121 #ifdef __cplusplus 122 extern "C" { 123 #endif 124 125 /* Already defined in ossl_typ.h */ 126 /* typedef struct dsa_st DSA; */ 127 /* typedef struct dsa_method DSA_METHOD; */ 128 129 typedef struct DSA_SIG_st 130 { 131 BIGNUM *r; 132 BIGNUM *s; 133 } DSA_SIG; 134 135 struct dsa_method 136 { 137 const char *name; 138 DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa); 139 int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, 140 BIGNUM **rp); 141 int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len, 142 DSA_SIG *sig, DSA *dsa); 143 int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, 144 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, 145 BN_MONT_CTX *in_mont); 146 int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, 147 const BIGNUM *m, BN_CTX *ctx, 148 BN_MONT_CTX *m_ctx); /* Can be null */ 149 int (*init)(DSA *dsa); 150 int (*finish)(DSA *dsa); 151 int flags; 152 char *app_data; 153 /* If this is non-NULL, it is used to generate DSA parameters */ 154 int (*dsa_paramgen)(DSA *dsa, int bits, 155 unsigned char *seed, int seed_len, 156 int *counter_ret, unsigned long *h_ret, 157 BN_GENCB *cb); 158 /* If this is non-NULL, it is used to generate DSA keys */ 159 int (*dsa_keygen)(DSA *dsa); 160 }; 161 162 struct dsa_st 163 { 164 /* This first variable is used to pick up errors where 165 * a DSA is passed instead of of a EVP_PKEY */ 166 int pad; 167 long version; 168 int write_params; 169 BIGNUM *p; 170 BIGNUM *q; /* == 20 */ 171 BIGNUM *g; 172 173 BIGNUM *pub_key; /* y public key */ 174 BIGNUM *priv_key; /* x private key */ 175 176 BIGNUM *kinv; /* Signing pre-calc */ 177 BIGNUM *r; /* Signing pre-calc */ 178 179 int flags; 180 /* Normally used to cache montgomery values */ 181 BN_MONT_CTX *method_mont_p; 182 int references; 183 CRYPTO_EX_DATA ex_data; 184 const DSA_METHOD *meth; 185 /* functional reference if 'meth' is ENGINE-provided */ 186 ENGINE *engine; 187 }; 188 189 #define DSAparams_dup(x) ASN1_dup_of_const(DSA,i2d_DSAparams,d2i_DSAparams,x) 190 #define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \ 191 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x)) 192 #define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \ 193 (unsigned char *)(x)) 194 #define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x) 195 #define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x) 196 197 198 DSA_SIG * DSA_SIG_new(void); 199 void DSA_SIG_free(DSA_SIG *a); 200 int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp); 201 DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length); 202 203 DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa); 204 int DSA_do_verify(const unsigned char *dgst,int dgst_len, 205 DSA_SIG *sig,DSA *dsa); 206 207 const DSA_METHOD *DSA_OpenSSL(void); 208 209 void DSA_set_default_method(const DSA_METHOD *); 210 const DSA_METHOD *DSA_get_default_method(void); 211 int DSA_set_method(DSA *dsa, const DSA_METHOD *); 212 213 #ifdef OPENSSL_FIPS 214 DSA * FIPS_dsa_new(void); 215 void FIPS_dsa_free (DSA *r); 216 #endif 217 218 DSA * DSA_new(void); 219 DSA * DSA_new_method(ENGINE *engine); 220 void DSA_free (DSA *r); 221 /* "up" the DSA object's reference count */ 222 int DSA_up_ref(DSA *r); 223 int DSA_size(const DSA *); 224 /* next 4 return -1 on error */ 225 int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp); 226 int DSA_sign(int type,const unsigned char *dgst,int dlen, 227 unsigned char *sig, unsigned int *siglen, DSA *dsa); 228 int DSA_verify(int type,const unsigned char *dgst,int dgst_len, 229 const unsigned char *sigbuf, int siglen, DSA *dsa); 230 int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 231 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); 232 int DSA_set_ex_data(DSA *d, int idx, void *arg); 233 void *DSA_get_ex_data(DSA *d, int idx); 234 235 DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length); 236 DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length); 237 DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length); 238 239 /* Deprecated version */ 240 #ifndef OPENSSL_NO_DEPRECATED 241 DSA * DSA_generate_parameters(int bits, 242 unsigned char *seed,int seed_len, 243 int *counter_ret, unsigned long *h_ret,void 244 (*callback)(int, int, void *),void *cb_arg); 245 #endif /* !defined(OPENSSL_NO_DEPRECATED) */ 246 247 /* New version */ 248 int DSA_generate_parameters_ex(DSA *dsa, int bits, 249 unsigned char *seed,int seed_len, 250 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); 251 252 int DSA_generate_key(DSA *a); 253 int i2d_DSAPublicKey(const DSA *a, unsigned char **pp); 254 int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp); 255 int i2d_DSAparams(const DSA *a,unsigned char **pp); 256 257 #ifndef OPENSSL_NO_BIO 258 int DSAparams_print(BIO *bp, const DSA *x); 259 int DSA_print(BIO *bp, const DSA *x, int off); 260 #endif 261 #ifndef OPENSSL_NO_FP_API 262 int DSAparams_print_fp(FILE *fp, const DSA *x); 263 int DSA_print_fp(FILE *bp, const DSA *x, int off); 264 #endif 265 266 #define DSS_prime_checks 50 267 /* Primality test according to FIPS PUB 186[-1], Appendix 2.1: 268 * 50 rounds of Rabin-Miller */ 269 #define DSA_is_prime(n, callback, cb_arg) \ 270 BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg) 271 272 #ifndef OPENSSL_NO_DH 273 /* Convert DSA structure (key or just parameters) into DH structure 274 * (be careful to avoid small subgroup attacks when using this!) */ 275 DH *DSA_dup_DH(const DSA *r); 276 #endif 277 278 #ifdef OPENSSL_FIPS 279 int FIPS_dsa_sig_encode(unsigned char *out, DSA_SIG *sig); 280 int FIPS_dsa_sig_decode(DSA_SIG *sig, const unsigned char *in, int inlen); 281 #endif 282 283 /* BEGIN ERROR CODES */ 284 /* The following lines are auto generated by the script mkerr.pl. Any changes 285 * made after this point may be overwritten when the script is next run. 286 */ 287 void ERR_load_DSA_strings(void); 288 289 /* Error codes for the DSA functions. */ 290 291 /* Function codes. */ 292 #define DSA_F_D2I_DSA_SIG 110 293 #define DSA_F_DSAPARAMS_PRINT 100 294 #define DSA_F_DSAPARAMS_PRINT_FP 101 295 #define DSA_F_DSA_BUILTIN_KEYGEN 119 296 #define DSA_F_DSA_BUILTIN_PARAMGEN 118 297 #define DSA_F_DSA_DO_SIGN 112 298 #define DSA_F_DSA_DO_VERIFY 113 299 #define DSA_F_DSA_GENERATE_PARAMETERS 117 300 #define DSA_F_DSA_NEW_METHOD 103 301 #define DSA_F_DSA_PRINT 104 302 #define DSA_F_DSA_PRINT_FP 105 303 #define DSA_F_DSA_SET_DEFAULT_METHOD 115 304 #define DSA_F_DSA_SET_METHOD 116 305 #define DSA_F_DSA_SIGN 106 306 #define DSA_F_DSA_SIGN_SETUP 107 307 #define DSA_F_DSA_SIG_NEW 109 308 #define DSA_F_DSA_VERIFY 108 309 #define DSA_F_I2D_DSA_SIG 111 310 #define DSA_F_SIG_CB 114 311 312 /* Reason codes. */ 313 #define DSA_R_BAD_Q_VALUE 102 314 #define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100 315 #define DSA_R_KEY_SIZE_TOO_SMALL 106 316 #define DSA_R_MISSING_PARAMETERS 101 317 #define DSA_R_MODULUS_TOO_LARGE 103 318 #define DSA_R_NON_FIPS_METHOD 104 319 #define DSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE 105 320 321 #ifdef __cplusplus 322 } 323 #endif 324 #endif 325
