2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
11 # define OPENSSL_DSA_H
14 # include <openssl/macros.h>
15 # ifndef OPENSSL_NO_DEPRECATED_3_0
19 # include <openssl/opensslconf.h>
21 # ifndef OPENSSL_NO_DSA
25 # include <openssl/e_os2.h>
26 # include <openssl/asn1.h>
27 # include <openssl/bio.h>
28 # include <openssl/crypto.h>
29 # include <openssl/types.h>
30 # include <openssl/bn.h>
31 # ifndef OPENSSL_NO_DEPRECATED_1_1_0
32 # include <openssl/dh.h>
34 # include <openssl/dsaerr.h>
36 # ifndef OPENSSL_DSA_MAX_MODULUS_BITS
37 # define OPENSSL_DSA_MAX_MODULUS_BITS 10000
40 # define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024
42 # define DSA_FLAG_CACHE_MONT_P 0x01
43 # ifndef OPENSSL_NO_DEPRECATED_1_1_0
45 * Does nothing. Previously this switched off constant time behaviour.
47 # define DSA_FLAG_NO_EXP_CONSTTIME 0x00
51 * If this flag is set the DSA method is FIPS compliant and can be used in
52 * FIPS mode. This is set in the validated module method. If an application
53 * sets this flag in its own methods it is its responsibility to ensure the
54 * result is compliant.
57 # define DSA_FLAG_FIPS_METHOD 0x0400
60 * If this flag is set the operations normally disabled in FIPS mode are
61 * permitted it is then the applications responsibility to ensure that the
65 # define DSA_FLAG_NON_FIPS_ALLOW 0x0400
66 # define DSA_FLAG_FIPS_CHECKED 0x0800
68 /* Already defined in ossl_typ.h */
69 /* typedef struct dsa_st DSA; */
70 /* typedef struct dsa_method DSA_METHOD; */
72 typedef struct DSA_SIG_st DSA_SIG;
74 # define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
75 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
76 # define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
78 # define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
79 # define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of(DSA,i2d_DSAparams,bp,x)
81 DECLARE_ASN1_DUP_FUNCTION_name(DSA, DSAparams)
82 DSA_SIG *DSA_SIG_new(void);
83 void DSA_SIG_free(DSA_SIG *a);
84 DECLARE_ASN1_ENCODE_FUNCTIONS_only(DSA_SIG, DSA_SIG)
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);
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);
92 const DSA_METHOD *DSA_OpenSSL(void);
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);
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 DEPRECATEDIN_3_0(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);
118 DECLARE_ASN1_ENCODE_FUNCTIONS_only(DSA, DSAPublicKey)
119 DECLARE_ASN1_ENCODE_FUNCTIONS_only(DSA, DSAPrivateKey)
120 DECLARE_ASN1_ENCODE_FUNCTIONS_only(DSA, DSAparams)
122 /* Deprecated version */
123 DEPRECATEDIN_0_9_8(DSA *DSA_generate_parameters(int bits,
127 unsigned long *h_ret, void
128 (*callback) (int, int,
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,
138 int DSA_generate_key(DSA *a);
140 int DSAparams_print(BIO *bp, const DSA *x);
141 int DSA_print(BIO *bp, const DSA *x, int off);
142 # ifndef OPENSSL_NO_STDIO
143 int DSAparams_print_fp(FILE *fp, const DSA *x);
144 int DSA_print_fp(FILE *bp, const DSA *x, int off);
147 # ifndef OPENSSL_NO_DEPRECATED_3_0
148 # define DSS_prime_checks 64
150 * Primality test according to FIPS PUB 186-4, Appendix C.3. Since we only
151 * have one value here we set the number of checks to 64 which is the 128 bit
152 * security level that is the highest level and valid for creating a 3072 bit
155 # define DSA_is_prime(n, callback, cb_arg) \
156 BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
159 # ifndef OPENSSL_NO_DH
161 * Convert DSA structure (key or just parameters) into DH structure (be
162 * careful to avoid small subgroup attacks when using this!)
164 DH *DSA_dup_DH(const DSA *r);
167 # define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \
168 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
169 EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL)
170 # define EVP_PKEY_CTX_set_dsa_paramgen_q_bits(ctx, qbits) \
171 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
172 EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits, NULL)
173 # define EVP_PKEY_CTX_set_dsa_paramgen_md(ctx, md) \
174 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
175 EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0, (void *)(md))
177 # define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS (EVP_PKEY_ALG_CTRL + 1)
178 # define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS (EVP_PKEY_ALG_CTRL + 2)
179 # define EVP_PKEY_CTRL_DSA_PARAMGEN_MD (EVP_PKEY_ALG_CTRL + 3)
181 void DSA_get0_pqg(const DSA *d,
182 const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
183 int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g);
184 void DSA_get0_key(const DSA *d,
185 const BIGNUM **pub_key, const BIGNUM **priv_key);
186 int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key);
187 const BIGNUM *DSA_get0_p(const DSA *d);
188 const BIGNUM *DSA_get0_q(const DSA *d);
189 const BIGNUM *DSA_get0_g(const DSA *d);
190 const BIGNUM *DSA_get0_pub_key(const DSA *d);
191 const BIGNUM *DSA_get0_priv_key(const DSA *d);
192 void DSA_clear_flags(DSA *d, int flags);
193 int DSA_test_flags(const DSA *d, int flags);
194 void DSA_set_flags(DSA *d, int flags);
195 ENGINE *DSA_get0_engine(DSA *d);
197 DSA_METHOD *DSA_meth_new(const char *name, int flags);
198 void DSA_meth_free(DSA_METHOD *dsam);
199 DSA_METHOD *DSA_meth_dup(const DSA_METHOD *dsam);
200 const char *DSA_meth_get0_name(const DSA_METHOD *dsam);
201 int DSA_meth_set1_name(DSA_METHOD *dsam, const char *name);
202 int DSA_meth_get_flags(const DSA_METHOD *dsam);
203 int DSA_meth_set_flags(DSA_METHOD *dsam, int flags);
204 void *DSA_meth_get0_app_data(const DSA_METHOD *dsam);
205 int DSA_meth_set0_app_data(DSA_METHOD *dsam, void *app_data);
206 DSA_SIG *(*DSA_meth_get_sign(const DSA_METHOD *dsam))
207 (const unsigned char *, int, DSA *);
208 int DSA_meth_set_sign(DSA_METHOD *dsam,
209 DSA_SIG *(*sign) (const unsigned char *, int, DSA *));
210 int (*DSA_meth_get_sign_setup(const DSA_METHOD *dsam))
211 (DSA *, BN_CTX *, BIGNUM **, BIGNUM **);
212 int DSA_meth_set_sign_setup(DSA_METHOD *dsam,
213 int (*sign_setup) (DSA *, BN_CTX *, BIGNUM **, BIGNUM **));
214 int (*DSA_meth_get_verify(const DSA_METHOD *dsam))
215 (const unsigned char *, int, DSA_SIG *, DSA *);
216 int DSA_meth_set_verify(DSA_METHOD *dsam,
217 int (*verify) (const unsigned char *, int, DSA_SIG *, DSA *));
218 int (*DSA_meth_get_mod_exp(const DSA_METHOD *dsam))
219 (DSA *, BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
220 const BIGNUM *, const BIGNUM *, BN_CTX *, BN_MONT_CTX *);
221 int DSA_meth_set_mod_exp(DSA_METHOD *dsam,
222 int (*mod_exp) (DSA *, BIGNUM *, const BIGNUM *, const BIGNUM *,
223 const BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *,
225 int (*DSA_meth_get_bn_mod_exp(const DSA_METHOD *dsam))
226 (DSA *, BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
227 BN_CTX *, BN_MONT_CTX *);
228 int DSA_meth_set_bn_mod_exp(DSA_METHOD *dsam,
229 int (*bn_mod_exp) (DSA *, BIGNUM *, const BIGNUM *, const BIGNUM *,
230 const BIGNUM *, BN_CTX *, BN_MONT_CTX *));
231 int (*DSA_meth_get_init(const DSA_METHOD *dsam))(DSA *);
232 int DSA_meth_set_init(DSA_METHOD *dsam, int (*init)(DSA *));
233 int (*DSA_meth_get_finish(const DSA_METHOD *dsam)) (DSA *);
234 int DSA_meth_set_finish(DSA_METHOD *dsam, int (*finish) (DSA *));
235 int (*DSA_meth_get_paramgen(const DSA_METHOD *dsam))
236 (DSA *, int, const unsigned char *, int, int *, unsigned long *,
238 int DSA_meth_set_paramgen(DSA_METHOD *dsam,
239 int (*paramgen) (DSA *, int, const unsigned char *, int, int *,
240 unsigned long *, BN_GENCB *));
241 int (*DSA_meth_get_keygen(const DSA_METHOD *dsam)) (DSA *);
242 int DSA_meth_set_keygen(DSA_METHOD *dsam, int (*keygen) (DSA *));