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 # include <openssl/dsaerr.h>
  34
  35 # ifndef OPENSSL_DSA_MAX_MODULUS_BITS
  36 #  define OPENSSL_DSA_MAX_MODULUS_BITS   10000
  37 # endif
  38
  39 # define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024
  40
  41 # define DSA_FLAG_CACHE_MONT_P   0x01
  42 # if OPENSSL_API_COMPAT < 0x10100000L
  43 /*
  44  * Does nothing. Previously this switched off constant time behaviour.
  45  */
  46 #  define DSA_FLAG_NO_EXP_CONSTTIME       0x00
  47 # endif
  48
  49 /*
  50  * If this flag is set the DSA method is FIPS compliant and can be used in
  51  * FIPS mode. This is set in the validated module method. If an application
  52  * sets this flag in its own methods it is its responsibility to ensure the
  53  * result is compliant.
  54  */
  55
  56 # define DSA_FLAG_FIPS_METHOD                    0x0400
  57
  58 /*
  59  * If this flag is set the operations normally disabled in FIPS mode are
  60  * permitted it is then the applications responsibility to ensure that the
  61  * usage is compliant.
  62  */
  63
  64 # define DSA_FLAG_NON_FIPS_ALLOW                 0x0400
  65 # define DSA_FLAG_FIPS_CHECKED                   0x0800
  66
  67 /* Already defined in ossl_typ.h */
  68 /* typedef struct dsa_st DSA; */
  69 /* typedef struct dsa_method DSA_METHOD; */
  70
  71 typedef struct DSA_SIG_st DSA_SIG;
  72
  73 # define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
  74                 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
  75 # define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
  76                 (unsigned char *)(x))
  77 # define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
  78 # define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x)
  79
  80 DSA *DSAparams_dup(DSA *x);
  81 DSA_SIG *DSA_SIG_new(void);
  82 void DSA_SIG_free(DSA_SIG *a);
  83 int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
  84 DSA_SIG *d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
  85 void DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
  86 int DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s);
  87
  88 DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
  89 int DSA_do_verify(const unsigned char *dgst, int dgst_len,
  90                   DSA_SIG *sig, DSA *dsa);
  91
  92 const DSA_METHOD *DSA_OpenSSL(void);
  93
  94 void DSA_set_default_method(const DSA_METHOD *);
  95 const DSA_METHOD *DSA_get_default_method(void);
  96 int DSA_set_method(DSA *dsa, const DSA_METHOD *);
  97 const DSA_METHOD *DSA_get_method(DSA *d);
  98
  99 DSA *DSA_new(void);
 100 DSA *DSA_new_method(ENGINE *engine);
 101 void DSA_free(DSA *r);
 102 /* "up" the DSA object's reference count */
 103 int DSA_up_ref(DSA *r);
 104 int DSA_size(const DSA *);
 105 int DSA_bits(const DSA *d);
 106 int DSA_security_bits(const DSA *d);
 107         /* next 4 return -1 on error */
 108 int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp);
 109 int DSA_sign(int type, const unsigned char *dgst, int dlen,
 110              unsigned char *sig, unsigned int *siglen, DSA *dsa);
 111 int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
 112                const unsigned char *sigbuf, int siglen, DSA *dsa);
 113 #define DSA_get_ex_new_index(l, p, newf, dupf, freef) \
 114     CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, l, p, newf, dupf, freef)
 115 int DSA_set_ex_data(DSA *d, int idx, void *arg);
 116 void *DSA_get_ex_data(DSA *d, int idx);
 117
 118 DSA *d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
 119 DSA *d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
 120 DSA *d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
 121
 122 /* Deprecated version */
 123 DEPRECATEDIN_0_9_8(DSA *DSA_generate_parameters(int bits,
 124                                                 unsigned char *seed,
 125                                                 int seed_len,
 126                                                 int *counter_ret,
 127                                                 unsigned long *h_ret, void
 128                                                  (*callback) (int, int,
 129                                                               void *),
 130                                                 void *cb_arg))
 131
 132 /* New version */
 133 int DSA_generate_parameters_ex(DSA *dsa, int bits,
 134                                const unsigned char *seed, int seed_len,
 135                                int *counter_ret, unsigned long *h_ret,
 136                                BN_GENCB *cb);
 137
 138 int DSA_generate_key(DSA *a);
 139 int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
 140 int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
 141 int i2d_DSAparams(const DSA *a, unsigned char **pp);
 142
 143 int DSAparams_print(BIO *bp, const DSA *x);
 144 int DSA_print(BIO *bp, const DSA *x, int off);
 145 # ifndef OPENSSL_NO_STDIO
 146 int DSAparams_print_fp(FILE *fp, const DSA *x);
 147 int DSA_print_fp(FILE *bp, const DSA *x, int off);
 148 # endif
 149
 150 # define DSS_prime_checks 50
 151 /*
 152  * Primality test according to FIPS PUB 186[-1], Appendix 2.1: 50 rounds of
 153  * Rabin-Miller
 154  */
 155 # define DSA_is_prime(n, callback, cb_arg) \
 156         BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
 157
 158 # ifndef OPENSSL_NO_DH
 159 /*
 160  * Convert DSA structure (key or just parameters) into DH structure (be
 161  * careful to avoid small subgroup attacks when using this!)
 162  */
 163 DH *DSA_dup_DH(const DSA *r);
 164 # endif
 165
 166 # define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \
 167         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
 168                                 EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL)
 169
 170 # define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS         (EVP_PKEY_ALG_CTRL + 1)
 171 # define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS       (EVP_PKEY_ALG_CTRL + 2)
 172 # define EVP_PKEY_CTRL_DSA_PARAMGEN_MD           (EVP_PKEY_ALG_CTRL + 3)
 173
 174 void DSA_get0_pqg(const DSA *d,
 175                   const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
 176 int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g);
 177 void DSA_get0_key(const DSA *d,
 178                   const BIGNUM **pub_key, const BIGNUM **priv_key);
 179 int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key);
 180 void DSA_clear_flags(DSA *d, int flags);
 181 int DSA_test_flags(const DSA *d, int flags);
 182 void DSA_set_flags(DSA *d, int flags);
 183 ENGINE *DSA_get0_engine(DSA *d);
 184
 185 DSA_METHOD *DSA_meth_new(const char *name, int flags);
 186 void DSA_meth_free(DSA_METHOD *dsam);
 187 DSA_METHOD *DSA_meth_dup(const DSA_METHOD *dsam);
 188 const char *DSA_meth_get0_name(const DSA_METHOD *dsam);
 189 int DSA_meth_set1_name(DSA_METHOD *dsam, const char *name);
 190 int DSA_meth_get_flags(DSA_METHOD *dsam);
 191 int DSA_meth_set_flags(DSA_METHOD *dsam, int flags);
 192 void *DSA_meth_get0_app_data(const DSA_METHOD *dsam);
 193 int DSA_meth_set0_app_data(DSA_METHOD *dsam, void *app_data);
 194 DSA_SIG *(*DSA_meth_get_sign(const DSA_METHOD *dsam))
 195         (const unsigned char *, int, DSA *);
 196 int DSA_meth_set_sign(DSA_METHOD *dsam,
 197                        DSA_SIG *(*sign) (const unsigned char *, int, DSA *));
 198 int (*DSA_meth_get_sign_setup(const DSA_METHOD *dsam))
 199         (DSA *, BN_CTX *, BIGNUM **, BIGNUM **);
 200 int DSA_meth_set_sign_setup(DSA_METHOD *dsam,
 201         int (*sign_setup) (DSA *, BN_CTX *, BIGNUM **, BIGNUM **));
 202 int (*DSA_meth_get_verify(const DSA_METHOD *dsam))
 203         (const unsigned char *, int, DSA_SIG *, DSA *);
 204 int DSA_meth_set_verify(DSA_METHOD *dsam,
 205     int (*verify) (const unsigned char *, int, DSA_SIG *, DSA *));
 206 int (*DSA_meth_get_mod_exp(const DSA_METHOD *dsam))
 207         (DSA *, BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
 208          const BIGNUM *, const BIGNUM *, BN_CTX *, BN_MONT_CTX *);
 209 int DSA_meth_set_mod_exp(DSA_METHOD *dsam,
 210     int (*mod_exp) (DSA *, BIGNUM *, const BIGNUM *, const BIGNUM *,
 211                     const BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *,
 212                     BN_MONT_CTX *));
 213 int (*DSA_meth_get_bn_mod_exp(const DSA_METHOD *dsam))
 214     (DSA *, BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
 215      BN_CTX *, BN_MONT_CTX *);
 216 int DSA_meth_set_bn_mod_exp(DSA_METHOD *dsam,
 217     int (*bn_mod_exp) (DSA *, BIGNUM *, const BIGNUM *, const BIGNUM *,
 218                        const BIGNUM *, BN_CTX *, BN_MONT_CTX *));
 219 int (*DSA_meth_get_init(const DSA_METHOD *dsam))(DSA *);
 220 int DSA_meth_set_init(DSA_METHOD *dsam, int (*init)(DSA *));
 221 int (*DSA_meth_get_finish(const DSA_METHOD *dsam)) (DSA *);
 222 int DSA_meth_set_finish(DSA_METHOD *dsam, int (*finish) (DSA *));
 223 int (*DSA_meth_get_paramgen(const DSA_METHOD *dsam))
 224         (DSA *, int, const unsigned char *, int, int *, unsigned long *,
 225          BN_GENCB *);
 226 int DSA_meth_set_paramgen(DSA_METHOD *dsam,
 227         int (*paramgen) (DSA *, int, const unsigned char *, int, int *,
 228                          unsigned long *, BN_GENCB *));
 229 int (*DSA_meth_get_keygen(const DSA_METHOD *dsam)) (DSA *);
 230 int DSA_meth_set_keygen(DSA_METHOD *dsam, int (*keygen) (DSA *));
 231
 232 int ERR_load_DSA_strings(void);
 233
 234 #  ifdef  __cplusplus
 235 }
 236 #  endif
 237 # endif
 238 #endif