include/openssl/dsa.h

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /*
  11  * The DSS routines are based on patches supplied by
  12  * Steven Schoch <schoch@sheba.arc.nasa.gov>.
  13  */
  14
  15 #ifndef HEADER_DSA_H
  16 # define HEADER_DSA_H
  17
  18 # include <openssl/opensslconf.h>
  19
  20 # ifndef OPENSSL_NO_DSA
  21 # ifdef  __cplusplus
  22 extern "C" {
  23 # endif
  24 # include <openssl/e_os2.h>
  25 # include <openssl/bio.h>
  26 # include <openssl/crypto.h>
  27 # include <openssl/ossl_typ.h>
  28 # include <openssl/opensslconf.h>
  29 # include <openssl/bn.h>
  30 # if OPENSSL_API_COMPAT < 0x10100000L
  31 #  include <openssl/dh.h>
  32 # endif
  33
  34 # ifndef OPENSSL_DSA_MAX_MODULUS_BITS
  35 #  define OPENSSL_DSA_MAX_MODULUS_BITS   10000
  36 # endif
  37
  38 # define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024
  39
  40 # define DSA_FLAG_CACHE_MONT_P   0x01
  41 # if OPENSSL_API_COMPAT < 0x10100000L
  42 /*
  43  * Does nothing. Previously this switched off constant time behaviour.
  44  */
  45 #  define DSA_FLAG_NO_EXP_CONSTTIME       0x00
  46 # endif
  47
  48 /*
  49  * If this flag is set the DSA method is FIPS compliant and can be used in
  50  * FIPS mode. This is set in the validated module method. If an application
  51  * sets this flag in its own methods it is its responsibility to ensure the
  52  * result is compliant.
  53  */
  54
  55 # define DSA_FLAG_FIPS_METHOD                    0x0400
  56
  57 /*
  58  * If this flag is set the operations normally disabled in FIPS mode are
  59  * permitted it is then the applications responsibility to ensure that the
  60  * usage is compliant.
  61  */
  62
  63 # define DSA_FLAG_NON_FIPS_ALLOW                 0x0400
  64 # define DSA_FLAG_FIPS_CHECKED                   0x0800
  65
  66 /* Already defined in ossl_typ.h */
  67 /* typedef struct dsa_st DSA; */
  68 /* typedef struct dsa_method DSA_METHOD; */
  69
  70 typedef struct DSA_SIG_st DSA_SIG;
  71
  72 # define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
  73                 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
  74 # define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
  75                 (unsigned char *)(x))
  76 # define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
  77 # define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x)
  78
  79 DSA *DSAparams_dup(DSA *x);
  80 DSA_SIG *DSA_SIG_new(void);
  81 void DSA_SIG_free(DSA_SIG *a);
  82 int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
  83 DSA_SIG *d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
  84 void DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
  85 int DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s);
  86
  87 DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
  88 int DSA_do_verify(const unsigned char *dgst, int dgst_len,
  89                   DSA_SIG *sig, DSA *dsa);
  90
  91 const DSA_METHOD *DSA_OpenSSL(void);
  92
  93 void DSA_set_default_method(const DSA_METHOD *);
  94 const DSA_METHOD *DSA_get_default_method(void);
  95 int DSA_set_method(DSA *dsa, const DSA_METHOD *);
  96 const DSA_METHOD *DSA_get_method(DSA *d);
  97
  98 DSA *DSA_new(void);
  99 DSA *DSA_new_method(ENGINE *engine);
 100 void DSA_free(DSA *r);
 101 /* "up" the DSA object's reference count */
 102 int DSA_up_ref(DSA *r);
 103 int DSA_size(const DSA *);
 104 int DSA_security_bits(const DSA *d);
 105         /* next 4 return -1 on error */
 106 int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp);
 107 int DSA_sign(int type, const unsigned char *dgst, int dlen,
 108              unsigned char *sig, unsigned int *siglen, DSA *dsa);
 109 int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
 110                const unsigned char *sigbuf, int siglen, DSA *dsa);
 111 #define DSA_get_ex_new_index(l, p, newf, dupf, freef) \
 112     CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, l, p, newf, dupf, freef)
 113 int DSA_set_ex_data(DSA *d, int idx, void *arg);
 114 void *DSA_get_ex_data(DSA *d, int idx);
 115
 116 DSA *d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
 117 DSA *d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
 118 DSA *d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
 119
 120 /* Deprecated version */
 121 DEPRECATEDIN_0_9_8(DSA *DSA_generate_parameters(int bits,
 122                                                 unsigned char *seed,
 123                                                 int seed_len,
 124                                                 int *counter_ret,
 125                                                 unsigned long *h_ret, void
 126                                                  (*callback) (int, int,
 127                                                               void *),
 128                                                 void *cb_arg))
 129
 130 /* New version */
 131 int DSA_generate_parameters_ex(DSA *dsa, int bits,
 132                                const unsigned char *seed, int seed_len,
 133                                int *counter_ret, unsigned long *h_ret,
 134                                BN_GENCB *cb);
 135
 136 int DSA_generate_key(DSA *a);
 137 int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
 138 int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
 139 int i2d_DSAparams(const DSA *a, unsigned char **pp);
 140
 141 int DSAparams_print(BIO *bp, const DSA *x);
 142 int DSA_print(BIO *bp, const DSA *x, int off);
 143 # ifndef OPENSSL_NO_STDIO
 144 int DSAparams_print_fp(FILE *fp, const DSA *x);
 145 int DSA_print_fp(FILE *bp, const DSA *x, int off);
 146 # endif
 147
 148 # define DSS_prime_checks 50
 149 /*
 150  * Primality test according to FIPS PUB 186[-1], Appendix 2.1: 50 rounds of
 151  * Rabin-Miller
 152  */
 153 # define DSA_is_prime(n, callback, cb_arg) \
 154         BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
 155
 156 # ifndef OPENSSL_NO_DH
 157 /*
 158  * Convert DSA structure (key or just parameters) into DH structure (be
 159  * careful to avoid small subgroup attacks when using this!)
 160  */
 161 DH *DSA_dup_DH(const DSA *r);
 162 # endif
 163
 164 # define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \
 165         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
 166                                 EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL)
 167
 168 # define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS         (EVP_PKEY_ALG_CTRL + 1)
 169 # define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS       (EVP_PKEY_ALG_CTRL + 2)
 170 # define EVP_PKEY_CTRL_DSA_PARAMGEN_MD           (EVP_PKEY_ALG_CTRL + 3)
 171
 172 void DSA_get0_pqg(const DSA *d,
 173                   const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
 174 int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g);
 175 void DSA_get0_key(const DSA *d,
 176                   const BIGNUM **pub_key, const BIGNUM **priv_key);
 177 int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key);
 178 void DSA_clear_flags(DSA *d, int flags);
 179 int DSA_test_flags(const DSA *d, int flags);
 180 void DSA_set_flags(DSA *d, int flags);
 181 ENGINE *DSA_get0_engine(DSA *d);
 182
 183 DSA_METHOD *DSA_meth_new(const char *name, int flags);
 184 void DSA_meth_free(DSA_METHOD *dsam);
 185 DSA_METHOD *DSA_meth_dup(const DSA_METHOD *dsam);
 186 const char *DSA_meth_get0_name(const DSA_METHOD *dsam);
 187 int DSA_meth_set1_name(DSA_METHOD *dsam, const char *name);
 188 int DSA_meth_get_flags(DSA_METHOD *dsam);
 189 int DSA_meth_set_flags(DSA_METHOD *dsam, int flags);
 190 void *DSA_meth_get0_app_data(const DSA_METHOD *dsam);
 191 int DSA_meth_set0_app_data(DSA_METHOD *dsam, void *app_data);
 192 DSA_SIG *(*DSA_meth_get_sign(const DSA_METHOD *dsam))
 193         (const unsigned char *, int, DSA *);
 194 int DSA_meth_set_sign(DSA_METHOD *dsam,
 195                        DSA_SIG *(*sign) (const unsigned char *, int, DSA *));
 196 int (*DSA_meth_get_sign_setup(const DSA_METHOD *dsam))
 197         (DSA *, BN_CTX *, BIGNUM **, BIGNUM **);
 198 int DSA_meth_set_sign_setup(DSA_METHOD *dsam,
 199         int (*sign_setup) (DSA *, BN_CTX *, BIGNUM **, BIGNUM **));
 200 int (*DSA_meth_get_verify(const DSA_METHOD *dsam))
 201         (const unsigned char *, int , DSA_SIG *, DSA *);
 202 int DSA_meth_set_verify(DSA_METHOD *dsam,
 203     int (*verify) (const unsigned char *, int, DSA_SIG *, DSA *));
 204 int (*DSA_meth_get_mod_exp(const DSA_METHOD *dsam))
 205         (DSA *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *,
 206          BN_CTX *, BN_MONT_CTX *);
 207 int DSA_meth_set_mod_exp(DSA_METHOD *dsam,
 208     int (*mod_exp) (DSA *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *,
 209                     BIGNUM *, BN_CTX *, BN_MONT_CTX *));
 210 int (*DSA_meth_get_bn_mod_exp(const DSA_METHOD *dsam))
 211     (DSA *, BIGNUM *, BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *,
 212      BN_MONT_CTX *);
 213 int DSA_meth_set_bn_mod_exp(DSA_METHOD *dsam,
 214     int (*bn_mod_exp) (DSA *, BIGNUM *, BIGNUM *, const BIGNUM *,
 215                        const BIGNUM *, BN_CTX *, BN_MONT_CTX *));
 216 int (*DSA_meth_get_init(const DSA_METHOD *dsam))(DSA *);
 217 int DSA_meth_set_init(DSA_METHOD *dsam, int (*init)(DSA *));
 218 int (*DSA_meth_get_finish(const DSA_METHOD *dsam)) (DSA *);
 219 int DSA_meth_set_finish(DSA_METHOD *dsam, int (*finish) (DSA *));
 220 int (*DSA_meth_get_paramgen(const DSA_METHOD *dsam))
 221         (DSA *, int, const unsigned char *, int, int *, unsigned long *,
 222          BN_GENCB *);
 223 int DSA_meth_set_paramgen(DSA_METHOD *dsam,
 224         int (*paramgen) (DSA *, int, const unsigned char *, int, int *,
 225                          unsigned long *, BN_GENCB *));
 226 int (*DSA_meth_get_keygen(const DSA_METHOD *dsam)) (DSA *);
 227 int DSA_meth_set_keygen(DSA_METHOD *dsam, int (*keygen) (DSA *));
 228
 229 /* BEGIN ERROR CODES */
 230 /*
 231  * The following lines are auto generated by the script mkerr.pl. Any changes
 232  * made after this point may be overwritten when the script is next run.
 233  */
 234
 235 void ERR_load_DSA_strings(void);
 236
 237 /* Error codes for the DSA functions. */
 238
 239 /* Function codes. */
 240 # define DSA_F_DSAPARAMS_PRINT                            100
 241 # define DSA_F_DSAPARAMS_PRINT_FP                         101
 242 # define DSA_F_DSA_BUILTIN_PARAMGEN                       125
 243 # define DSA_F_DSA_BUILTIN_PARAMGEN2                      126
 244 # define DSA_F_DSA_DO_SIGN                                112
 245 # define DSA_F_DSA_DO_VERIFY                              113
 246 # define DSA_F_DSA_METH_DUP                               127
 247 # define DSA_F_DSA_METH_NEW                               128
 248 # define DSA_F_DSA_METH_SET1_NAME                         129
 249 # define DSA_F_DSA_NEW_METHOD                             103
 250 # define DSA_F_DSA_PARAM_DECODE                           119
 251 # define DSA_F_DSA_PRINT_FP                               105
 252 # define DSA_F_DSA_PRIV_DECODE                            115
 253 # define DSA_F_DSA_PRIV_ENCODE                            116
 254 # define DSA_F_DSA_PUB_DECODE                             117
 255 # define DSA_F_DSA_PUB_ENCODE                             118
 256 # define DSA_F_DSA_SIGN                                   106
 257 # define DSA_F_DSA_SIGN_SETUP                             107
 258 # define DSA_F_OLD_DSA_PRIV_DECODE                        122
 259 # define DSA_F_PKEY_DSA_CTRL                              120
 260 # define DSA_F_PKEY_DSA_KEYGEN                            121
 261
 262 /* Reason codes. */
 263 # define DSA_R_BAD_Q_VALUE                                102
 264 # define DSA_R_BN_DECODE_ERROR                            108
 265 # define DSA_R_BN_ERROR                                   109
 266 # define DSA_R_DECODE_ERROR                               104
 267 # define DSA_R_INVALID_DIGEST_TYPE                        106
 268 # define DSA_R_INVALID_PARAMETERS                         112
 269 # define DSA_R_MISSING_PARAMETERS                         101
 270 # define DSA_R_MODULUS_TOO_LARGE                          103
 271 # define DSA_R_NO_PARAMETERS_SET                          107
 272 # define DSA_R_PARAMETER_ENCODING_ERROR                   105
 273 # define DSA_R_Q_NOT_PRIME                                113
 274
 275 #  ifdef  __cplusplus
 276 }
 277 #  endif
 278 # endif
 279 #endif