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 OPENSSL_NO_DSA 69#error DSA is disabled. 70#endif 71 72#ifndef OPENSSL_NO_BIO 73#include <openssl/bio.h> 74#endif 75#include <openssl/bn.h> 76#include <openssl/crypto.h> 77#include <openssl/ossl_typ.h> 78#ifndef OPENSSL_NO_DH 79# include <openssl/dh.h> 80#endif 81 82#define DSA_FLAG_CACHE_MONT_P 0x01 83 84#ifdef __cplusplus 85extern "C" { 86#endif 87 88typedef struct dsa_st DSA; 89 90typedef struct DSA_SIG_st 91 { 92 BIGNUM *r; 93 BIGNUM *s; 94 } DSA_SIG; 95 96typedef struct dsa_method { 97 const char *name; 98 DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa); 99 int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, 100 BIGNUM **rp); 101 int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len, 102 DSA_SIG *sig, DSA *dsa); 103 int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, 104 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, 105 BN_MONT_CTX *in_mont); 106 int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, 107 const BIGNUM *m, BN_CTX *ctx, 108 BN_MONT_CTX *m_ctx); /* Can be null */ 109 int (*init)(DSA *dsa); 110 int (*finish)(DSA *dsa); 111 int flags; 112 char *app_data; 113} DSA_METHOD; 114 115struct dsa_st 116 { 117 /* This first variable is used to pick up errors where 118 * a DSA is passed instead of of a EVP_PKEY */ 119 int pad; 120 long version; 121 int write_params; 122 BIGNUM *p; 123 BIGNUM *q; /* == 20 */ 124 BIGNUM *g; 125 126 BIGNUM *pub_key; /* y public key */ 127 BIGNUM *priv_key; /* x private key */ 128 129 BIGNUM *kinv; /* Signing pre-calc */ 130 BIGNUM *r; /* Signing pre-calc */ 131 132 int flags; 133 /* Normally used to cache montgomery values */ 134 char *method_mont_p; 135 int references; 136 CRYPTO_EX_DATA ex_data; 137 const DSA_METHOD *meth; 138 /* functional reference if 'meth' is ENGINE-provided */ 139 ENGINE *engine; 140 }; 141 142#define DSAparams_dup(x) (DSA *)ASN1_dup((int (*)())i2d_DSAparams, \ 143 (char *(*)())d2i_DSAparams,(char *)(x)) 144#define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \ 145 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x)) 146#define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \ 147 (unsigned char *)(x)) 148#define d2i_DSAparams_bio(bp,x) (DSA *)ASN1_d2i_bio((char *(*)())DSA_new, \ 149 (char *(*)())d2i_DSAparams,(bp),(unsigned char **)(x)) 150#define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio(i2d_DSAparams,(bp), \ 151 (unsigned char *)(x)) 152 153 154DSA_SIG * DSA_SIG_new(void); 155void DSA_SIG_free(DSA_SIG *a); 156int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp); 157DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length); 158 159DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa); 160int DSA_do_verify(const unsigned char *dgst,int dgst_len, 161 DSA_SIG *sig,DSA *dsa); 162 163const DSA_METHOD *DSA_OpenSSL(void); 164 165void DSA_set_default_method(const DSA_METHOD *); 166const DSA_METHOD *DSA_get_default_method(void); 167int DSA_set_method(DSA *dsa, const DSA_METHOD *); 168 169DSA * DSA_new(void); 170DSA * DSA_new_method(ENGINE *engine); 171void DSA_free (DSA *r); 172/* "up" the DSA object's reference count */ 173int DSA_up_ref(DSA *r); 174int DSA_size(const DSA *); 175 /* next 4 return -1 on error */ 176int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp); 177int DSA_sign(int type,const unsigned char *dgst,int dlen, 178 unsigned char *sig, unsigned int *siglen, DSA *dsa); 179int DSA_verify(int type,const unsigned char *dgst,int dgst_len, 180 const unsigned char *sigbuf, int siglen, DSA *dsa); 181int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 182 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); 183int DSA_set_ex_data(DSA *d, int idx, void *arg); 184void *DSA_get_ex_data(DSA *d, int idx); 185 186DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length); 187DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length); 188DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length); 189DSA * DSA_generate_parameters(int bits, 190 unsigned char *seed,int seed_len, 191 int *counter_ret, unsigned long *h_ret,void 192 (*callback)(int, int, void *),void *cb_arg); 193int DSA_generate_key(DSA *a); 194int i2d_DSAPublicKey(const DSA *a, unsigned char **pp); 195int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp); 196int i2d_DSAparams(const DSA *a,unsigned char **pp); 197 198#ifndef OPENSSL_NO_BIO 199int DSAparams_print(BIO *bp, const DSA *x); 200int DSA_print(BIO *bp, const DSA *x, int off); 201#endif 202#ifndef OPENSSL_NO_FP_API 203int DSAparams_print_fp(FILE *fp, const DSA *x); 204int DSA_print_fp(FILE *bp, const DSA *x, int off); 205#endif 206 207#define DSS_prime_checks 50 208/* Primality test according to FIPS PUB 186[-1], Appendix 2.1: 209 * 50 rounds of Rabin-Miller */ 210#define DSA_is_prime(n, callback, cb_arg) \ 211 BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg) 212 213#ifndef OPENSSL_NO_DH 214/* Convert DSA structure (key or just parameters) into DH structure 215 * (be careful to avoid small subgroup attacks when using this!) */ 216DH *DSA_dup_DH(const DSA *r); 217#endif 218 219/* BEGIN ERROR CODES */ 220/* The following lines are auto generated by the script mkerr.pl. Any changes 221 * made after this point may be overwritten when the script is next run. 222 */ 223void ERR_load_DSA_strings(void); 224 225/* Error codes for the DSA functions. */ 226 227/* Function codes. */ 228#define DSA_F_D2I_DSA_SIG 110 229#define DSA_F_DSAPARAMS_PRINT 100 230#define DSA_F_DSAPARAMS_PRINT_FP 101 231#define DSA_F_DSA_DO_SIGN 112 232#define DSA_F_DSA_DO_VERIFY 113 233#define DSA_F_DSA_NEW_METHOD 103 234#define DSA_F_DSA_PRINT 104 235#define DSA_F_DSA_PRINT_FP 105 236#define DSA_F_DSA_SIGN 106 237#define DSA_F_DSA_SIGN_SETUP 107 238#define DSA_F_DSA_SIG_NEW 109 239#define DSA_F_DSA_VERIFY 108 240#define DSA_F_I2D_DSA_SIG 111 241#define DSA_F_SIG_CB 114 242 243/* Reason codes. */ 244#define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100 245#define DSA_R_MISSING_PARAMETERS 101 246 247#ifdef __cplusplus 248} 249#endif 250#endif 251