dsa.h revision 59191
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#ifdef __cplusplus 69extern "C" { 70#endif 71 72#ifdef NO_DSA 73#error DSA is disabled. 74#endif 75 76#include <openssl/bn.h> 77#include <openssl/crypto.h> 78#ifndef NO_DH 79# include <openssl/dh.h> 80#endif 81 82#define DSA_FLAG_CACHE_MONT_P 0x01 83 84typedef struct dsa_st DSA; 85 86typedef struct DSA_SIG_st 87 { 88 BIGNUM *r; 89 BIGNUM *s; 90 } DSA_SIG; 91 92typedef struct dsa_method { 93 const char *name; 94 DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa); 95 int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, 96 BIGNUM **rp); 97 int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len, 98 DSA_SIG *sig, DSA *dsa); 99 int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, 100 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, 101 BN_MONT_CTX *in_mont); 102 int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, 103 const BIGNUM *m, BN_CTX *ctx, 104 BN_MONT_CTX *m_ctx); /* Can be null */ 105 int (*init)(DSA *dsa); 106 int (*finish)(DSA *dsa); 107 int flags; 108 char *app_data; 109} DSA_METHOD; 110 111struct dsa_st 112 { 113 /* This first variable is used to pick up errors where 114 * a DSA is passed instead of of a EVP_PKEY */ 115 int pad; 116 int version; 117 int write_params; 118 BIGNUM *p; 119 BIGNUM *q; /* == 20 */ 120 BIGNUM *g; 121 122 BIGNUM *pub_key; /* y public key */ 123 BIGNUM *priv_key; /* x private key */ 124 125 BIGNUM *kinv; /* Signing pre-calc */ 126 BIGNUM *r; /* Signing pre-calc */ 127 128 int flags; 129 /* Normally used to cache montgomery values */ 130 char *method_mont_p; 131 int references; 132 CRYPTO_EX_DATA ex_data; 133 DSA_METHOD *meth; 134 }; 135 136#define DSAparams_dup(x) (DSA *)ASN1_dup((int (*)())i2d_DSAparams, \ 137 (char *(*)())d2i_DSAparams,(char *)(x)) 138#define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \ 139 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x)) 140#define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \ 141 (unsigned char *)(x)) 142#define d2i_DSAparams_bio(bp,x) (DSA *)ASN1_d2i_bio((char *(*)())DSA_new, \ 143 (char *(*)())d2i_DSAparams,(bp),(unsigned char **)(x)) 144#define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio(i2d_DSAparams,(bp), \ 145 (unsigned char *)(x)) 146 147 148DSA_SIG * DSA_SIG_new(void); 149void DSA_SIG_free(DSA_SIG *a); 150int i2d_DSA_SIG(DSA_SIG *a, unsigned char **pp); 151DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, unsigned char **pp, long length); 152 153DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa); 154int DSA_do_verify(const unsigned char *dgst,int dgst_len, 155 DSA_SIG *sig,DSA *dsa); 156 157DSA_METHOD *DSA_OpenSSL(void); 158 159void DSA_set_default_method(DSA_METHOD *); 160DSA_METHOD *DSA_get_default_method(void); 161DSA_METHOD *DSA_set_method(DSA *dsa, DSA_METHOD *); 162 163DSA * DSA_new(void); 164DSA * DSA_new_method(DSA_METHOD *meth); 165int DSA_size(DSA *); 166 /* next 4 return -1 on error */ 167int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp); 168int DSA_sign(int type,const unsigned char *dgst,int dlen, 169 unsigned char *sig, unsigned int *siglen, DSA *dsa); 170int DSA_verify(int type,const unsigned char *dgst,int dgst_len, 171 unsigned char *sigbuf, int siglen, DSA *dsa); 172void DSA_free (DSA *r); 173int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 174 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); 175int DSA_set_ex_data(DSA *d, int idx, void *arg); 176void *DSA_get_ex_data(DSA *d, int idx); 177 178void ERR_load_DSA_strings(void ); 179 180DSA * d2i_DSAPublicKey(DSA **a, unsigned char **pp, long length); 181DSA * d2i_DSAPrivateKey(DSA **a, unsigned char **pp, long length); 182DSA * d2i_DSAparams(DSA **a, unsigned char **pp, long length); 183DSA * DSA_generate_parameters(int bits, unsigned char *seed,int seed_len, 184 int *counter_ret, unsigned long *h_ret,void 185 (*callback)(int, int, void *),void *cb_arg); 186int DSA_generate_key(DSA *a); 187int i2d_DSAPublicKey(DSA *a, unsigned char **pp); 188int i2d_DSAPrivateKey(DSA *a, unsigned char **pp); 189int i2d_DSAparams(DSA *a,unsigned char **pp); 190 191#ifdef HEADER_BIO_H 192int DSAparams_print(BIO *bp, DSA *x); 193int DSA_print(BIO *bp, DSA *x, int off); 194#endif 195#ifndef NO_FP_API 196int DSAparams_print_fp(FILE *fp, DSA *x); 197int DSA_print_fp(FILE *bp, DSA *x, int off); 198#endif 199 200#define DSS_prime_checks 50 201/* Primality test according to FIPS PUB 186[-1], Appendix 2.1: 202 * 50 rounds of Rabin-Miller */ 203#define DSA_is_prime(n, callback, cb_arg) \ 204 BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg) 205 206#ifndef NO_DH 207/* Convert DSA structure (key or just parameters) into DH structure 208 * (be careful to avoid small subgroup attacks when using this!) */ 209DH *DSA_dup_DH(DSA *r); 210#endif 211 212/* BEGIN ERROR CODES */ 213/* The following lines are auto generated by the script mkerr.pl. Any changes 214 * made after this point may be overwritten when the script is next run. 215 */ 216 217/* Error codes for the DSA functions. */ 218 219/* Function codes. */ 220#define DSA_F_D2I_DSA_SIG 110 221#define DSA_F_DSAPARAMS_PRINT 100 222#define DSA_F_DSAPARAMS_PRINT_FP 101 223#define DSA_F_DSA_DO_SIGN 112 224#define DSA_F_DSA_DO_VERIFY 113 225#define DSA_F_DSA_NEW 103 226#define DSA_F_DSA_PRINT 104 227#define DSA_F_DSA_PRINT_FP 105 228#define DSA_F_DSA_SIGN 106 229#define DSA_F_DSA_SIGN_SETUP 107 230#define DSA_F_DSA_SIG_NEW 109 231#define DSA_F_DSA_VERIFY 108 232#define DSA_F_I2D_DSA_SIG 111 233 234/* Reason codes. */ 235#define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100 236 237#ifdef __cplusplus 238} 239#endif 240#endif 241 242