1/* crypto/dsa/dsa.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/* 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 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 DSA_FLAG_CACHE_MONT_P 0x01 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 */ 99#define DSA_FLAG_NONCE_FROM_HASH 0x04 /* Causes the DSA nonce to be calculated 100 from SHA512(private_key + H(message) + 101 random). This strengthens DSA against a 102 weak PRNG. */ 103 104/* If this flag is set the DSA method is FIPS compliant and can be used 105 * in FIPS mode. This is set in the validated module method. If an 106 * application sets this flag in its own methods it is its reposibility 107 * to ensure the result is compliant. 108 */ 109 110#define DSA_FLAG_FIPS_METHOD 0x0400 111 112/* If this flag is set the operations normally disabled in FIPS mode are 113 * permitted it is then the applications responsibility to ensure that the 114 * usage is compliant. 115 */ 116 117#define DSA_FLAG_NON_FIPS_ALLOW 0x0400 118 119#ifdef __cplusplus 120extern "C" { 121#endif 122 123/* Already defined in ossl_typ.h */ 124/* typedef struct dsa_st DSA; */ 125/* typedef struct dsa_method DSA_METHOD; */ 126 127typedef struct DSA_SIG_st 128 { 129 BIGNUM *r; 130 BIGNUM *s; 131 } DSA_SIG; 132 133struct dsa_method 134 { 135 const char *name; 136 DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa); 137 int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, 138 BIGNUM **kinvp, BIGNUM **rp, 139 const unsigned char *dgst, int dlen); 140 int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len, 141 DSA_SIG *sig, DSA *dsa); 142 int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, 143 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, 144 BN_MONT_CTX *in_mont); 145 int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, 146 const BIGNUM *m, BN_CTX *ctx, 147 BN_MONT_CTX *m_ctx); /* Can be null */ 148 int (*init)(DSA *dsa); 149 int (*finish)(DSA *dsa); 150 int flags; 151 char *app_data; 152 /* If this is non-NULL, it is used to generate DSA parameters */ 153 int (*dsa_paramgen)(DSA *dsa, int bits, 154 const unsigned char *seed, int seed_len, 155 int *counter_ret, unsigned long *h_ret, 156 BN_GENCB *cb); 157 /* If this is non-NULL, it is used to generate DSA keys */ 158 int (*dsa_keygen)(DSA *dsa); 159 }; 160 161struct dsa_st 162 { 163 /* This first variable is used to pick up errors where 164 * a DSA is passed instead of of a EVP_PKEY */ 165 int pad; 166 long version; 167 int write_params; 168 BIGNUM *p; 169 BIGNUM *q; /* == 20 */ 170 BIGNUM *g; 171 172 BIGNUM *pub_key; /* y public key */ 173 BIGNUM *priv_key; /* x private key */ 174 175 BIGNUM *kinv; /* Signing pre-calc */ 176 BIGNUM *r; /* Signing pre-calc */ 177 178 int flags; 179 /* Normally used to cache montgomery values */ 180 BN_MONT_CTX *method_mont_p; 181 int references; 182 CRYPTO_EX_DATA ex_data; 183 const DSA_METHOD *meth; 184 /* functional reference if 'meth' is ENGINE-provided */ 185 ENGINE *engine; 186 }; 187 188#define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \ 189 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x)) 190#define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \ 191 (unsigned char *)(x)) 192#define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x) 193#define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x) 194 195 196DSA *DSAparams_dup(DSA *x); 197DSA_SIG * DSA_SIG_new(void); 198void DSA_SIG_free(DSA_SIG *a); 199int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp); 200DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length); 201 202DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa); 203int DSA_do_verify(const unsigned char *dgst,int dgst_len, 204 DSA_SIG *sig,DSA *dsa); 205 206const DSA_METHOD *DSA_OpenSSL(void); 207 208void DSA_set_default_method(const DSA_METHOD *); 209const DSA_METHOD *DSA_get_default_method(void); 210int DSA_set_method(DSA *dsa, const DSA_METHOD *); 211 212DSA * DSA_new(void); 213DSA * DSA_new_method(ENGINE *engine); 214void DSA_free (DSA *r); 215/* "up" the DSA object's reference count */ 216int DSA_up_ref(DSA *r); 217int DSA_size(const DSA *); 218 /* next 4 return -1 on error */ 219int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp); 220int DSA_sign(int type,const unsigned char *dgst,int dlen, 221 unsigned char *sig, unsigned int *siglen, DSA *dsa); 222int DSA_verify(int type,const unsigned char *dgst,int dgst_len, 223 const unsigned char *sigbuf, int siglen, DSA *dsa); 224int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 225 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); 226int DSA_set_ex_data(DSA *d, int idx, void *arg); 227void *DSA_get_ex_data(DSA *d, int idx); 228 229DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length); 230DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length); 231DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length); 232 233/* Deprecated version */ 234#ifndef OPENSSL_NO_DEPRECATED 235DSA * DSA_generate_parameters(int bits, 236 unsigned char *seed,int seed_len, 237 int *counter_ret, unsigned long *h_ret,void 238 (*callback)(int, int, void *),void *cb_arg); 239#endif /* !defined(OPENSSL_NO_DEPRECATED) */ 240 241/* New version */ 242int DSA_generate_parameters_ex(DSA *dsa, int bits, 243 const unsigned char *seed,int seed_len, 244 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); 245 246int DSA_generate_key(DSA *a); 247int i2d_DSAPublicKey(const DSA *a, unsigned char **pp); 248int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp); 249int i2d_DSAparams(const DSA *a,unsigned char **pp); 250 251#ifndef OPENSSL_NO_BIO 252int DSAparams_print(BIO *bp, const DSA *x); 253int DSA_print(BIO *bp, const DSA *x, int off); 254#endif 255#ifndef OPENSSL_NO_FP_API 256int DSAparams_print_fp(FILE *fp, const DSA *x); 257int DSA_print_fp(FILE *bp, const DSA *x, int off); 258#endif 259 260#define DSS_prime_checks 50 261/* Primality test according to FIPS PUB 186[-1], Appendix 2.1: 262 * 50 rounds of Rabin-Miller */ 263#define DSA_is_prime(n, callback, cb_arg) \ 264 BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg) 265 266#ifndef OPENSSL_NO_DH 267/* Convert DSA structure (key or just parameters) into DH structure 268 * (be careful to avoid small subgroup attacks when using this!) */ 269DH *DSA_dup_DH(const DSA *r); 270#endif 271 272#define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \ 273 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \ 274 EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL) 275 276#define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS (EVP_PKEY_ALG_CTRL + 1) 277#define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS (EVP_PKEY_ALG_CTRL + 2) 278#define EVP_PKEY_CTRL_DSA_PARAMGEN_MD (EVP_PKEY_ALG_CTRL + 3) 279 280/* BEGIN ERROR CODES */ 281/* The following lines are auto generated by the script mkerr.pl. Any changes 282 * made after this point may be overwritten when the script is next run. 283 */ 284void ERR_load_DSA_strings(void); 285 286/* Error codes for the DSA functions. */ 287 288/* Function codes. */ 289#define DSA_F_D2I_DSA_SIG 110 290#define DSA_F_DO_DSA_PRINT 104 291#define DSA_F_DSAPARAMS_PRINT 100 292#define DSA_F_DSAPARAMS_PRINT_FP 101 293#define DSA_F_DSA_DO_SIGN 112 294#define DSA_F_DSA_DO_VERIFY 113 295#define DSA_F_DSA_GENERATE_KEY 124 296#define DSA_F_DSA_GENERATE_PARAMETERS_EX 123 297#define DSA_F_DSA_NEW_METHOD 103 298#define DSA_F_DSA_PARAM_DECODE 119 299#define DSA_F_DSA_PRINT_FP 105 300#define DSA_F_DSA_PRIV_DECODE 115 301#define DSA_F_DSA_PRIV_ENCODE 116 302#define DSA_F_DSA_PUB_DECODE 117 303#define DSA_F_DSA_PUB_ENCODE 118 304#define DSA_F_DSA_SIGN 106 305#define DSA_F_DSA_SIGN_SETUP 107 306#define DSA_F_DSA_SIG_NEW 109 307#define DSA_F_DSA_SIG_PRINT 125 308#define DSA_F_DSA_VERIFY 108 309#define DSA_F_I2D_DSA_SIG 111 310#define DSA_F_OLD_DSA_PRIV_DECODE 122 311#define DSA_F_PKEY_DSA_CTRL 120 312#define DSA_F_PKEY_DSA_KEYGEN 121 313#define DSA_F_SIG_CB 114 314 315/* Reason codes. */ 316#define DSA_R_BAD_Q_VALUE 102 317#define DSA_R_BN_DECODE_ERROR 108 318#define DSA_R_BN_ERROR 109 319#define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100 320#define DSA_R_DECODE_ERROR 104 321#define DSA_R_INVALID_DIGEST_TYPE 106 322#define DSA_R_MISSING_PARAMETERS 101 323#define DSA_R_MODULUS_TOO_LARGE 103 324#define DSA_R_NEED_NEW_SETUP_VALUES 110 325#define DSA_R_NONCE_CANNOT_BE_PRECOMPUTED 112 326#define DSA_R_NON_FIPS_DSA_METHOD 111 327#define DSA_R_NO_PARAMETERS_SET 107 328#define DSA_R_PARAMETER_ENCODING_ERROR 105 329 330#ifdef __cplusplus 331} 332#endif 333#endif 334