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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/dsa/dsa.h
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
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 :-) */
68 #include <openssl/e_os2.h>
71 #error DSA is disabled.
74 #ifndef OPENSSL_NO_BIO
75 #include <openssl/bio.h>
77 #include <openssl/bn.h>
78 #include <openssl/crypto.h>
79 #include <openssl/ossl_typ.h>
81 # include <openssl/dh.h>
84 #define DSA_FLAG_CACHE_MONT_P 0x01
90 /* Already defined in ossl_typ.h */
91 /* typedef struct dsa_st DSA; */
92 /* typedef struct dsa_method DSA_METHOD; */
94 typedef struct DSA_SIG_st
103 DSA_SIG
* (*dsa_do_sign
)(const unsigned char *dgst
, int dlen
, DSA
*dsa
);
104 int (*dsa_sign_setup
)(DSA
*dsa
, BN_CTX
*ctx_in
, BIGNUM
**kinvp
,
106 int (*dsa_do_verify
)(const unsigned char *dgst
, int dgst_len
,
107 DSA_SIG
*sig
, DSA
*dsa
);
108 int (*dsa_mod_exp
)(DSA
*dsa
, BIGNUM
*rr
, BIGNUM
*a1
, BIGNUM
*p1
,
109 BIGNUM
*a2
, BIGNUM
*p2
, BIGNUM
*m
, BN_CTX
*ctx
,
110 BN_MONT_CTX
*in_mont
);
111 int (*bn_mod_exp
)(DSA
*dsa
, BIGNUM
*r
, BIGNUM
*a
, const BIGNUM
*p
,
112 const BIGNUM
*m
, BN_CTX
*ctx
,
113 BN_MONT_CTX
*m_ctx
); /* Can be null */
114 int (*init
)(DSA
*dsa
);
115 int (*finish
)(DSA
*dsa
);
118 /* If this is non-NULL, it is used to generate DSA parameters */
119 int (*dsa_paramgen
)(DSA
*dsa
, int bits
,
120 unsigned char *seed
, int seed_len
,
121 int *counter_ret
, unsigned long *h_ret
,
123 /* If this is non-NULL, it is used to generate DSA keys */
124 int (*dsa_keygen
)(DSA
*dsa
);
129 /* This first variable is used to pick up errors where
130 * a DSA is passed instead of of a EVP_PKEY */
135 BIGNUM
*q
; /* == 20 */
138 BIGNUM
*pub_key
; /* y public key */
139 BIGNUM
*priv_key
; /* x private key */
141 BIGNUM
*kinv
; /* Signing pre-calc */
142 BIGNUM
*r
; /* Signing pre-calc */
145 /* Normally used to cache montgomery values */
148 CRYPTO_EX_DATA ex_data
;
149 const DSA_METHOD
*meth
;
150 /* functional reference if 'meth' is ENGINE-provided */
154 #define DSAparams_dup(x) (DSA *)ASN1_dup((int (*)())i2d_DSAparams, \
155 (char *(*)())d2i_DSAparams,(char *)(x))
156 #define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
157 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
158 #define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
159 (unsigned char *)(x))
160 #define d2i_DSAparams_bio(bp,x) (DSA *)ASN1_d2i_bio((char *(*)())DSA_new, \
161 (char *(*)())d2i_DSAparams,(bp),(unsigned char **)(x))
162 #define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio(i2d_DSAparams,(bp), \
163 (unsigned char *)(x))
166 DSA_SIG
* DSA_SIG_new(void);
167 void DSA_SIG_free(DSA_SIG
*a
);
168 int i2d_DSA_SIG(const DSA_SIG
*a
, unsigned char **pp
);
169 DSA_SIG
* d2i_DSA_SIG(DSA_SIG
**v
, const unsigned char **pp
, long length
);
171 DSA_SIG
* DSA_do_sign(const unsigned char *dgst
,int dlen
,DSA
*dsa
);
172 int DSA_do_verify(const unsigned char *dgst
,int dgst_len
,
173 DSA_SIG
*sig
,DSA
*dsa
);
175 const DSA_METHOD
*DSA_OpenSSL(void);
177 void DSA_set_default_method(const DSA_METHOD
*);
178 const DSA_METHOD
*DSA_get_default_method(void);
179 int DSA_set_method(DSA
*dsa
, const DSA_METHOD
*);
182 DSA
* DSA_new_method(ENGINE
*engine
);
183 void DSA_free (DSA
*r
);
184 /* "up" the DSA object's reference count */
185 int DSA_up_ref(DSA
*r
);
186 int DSA_size(const DSA
*);
187 /* next 4 return -1 on error */
188 int DSA_sign_setup( DSA
*dsa
,BN_CTX
*ctx_in
,BIGNUM
**kinvp
,BIGNUM
**rp
);
189 int DSA_sign(int type
,const unsigned char *dgst
,int dlen
,
190 unsigned char *sig
, unsigned int *siglen
, DSA
*dsa
);
191 int DSA_verify(int type
,const unsigned char *dgst
,int dgst_len
,
192 const unsigned char *sigbuf
, int siglen
, DSA
*dsa
);
193 int DSA_get_ex_new_index(long argl
, void *argp
, CRYPTO_EX_new
*new_func
,
194 CRYPTO_EX_dup
*dup_func
, CRYPTO_EX_free
*free_func
);
195 int DSA_set_ex_data(DSA
*d
, int idx
, void *arg
);
196 void *DSA_get_ex_data(DSA
*d
, int idx
);
198 DSA
* d2i_DSAPublicKey(DSA
**a
, const unsigned char **pp
, long length
);
199 DSA
* d2i_DSAPrivateKey(DSA
**a
, const unsigned char **pp
, long length
);
200 DSA
* d2i_DSAparams(DSA
**a
, const unsigned char **pp
, long length
);
202 /* Deprecated version */
203 #ifndef OPENSSL_NO_DEPRECATED
204 DSA
* DSA_generate_parameters(int bits
,
205 unsigned char *seed
,int seed_len
,
206 int *counter_ret
, unsigned long *h_ret
,void
207 (*callback
)(int, int, void *),void *cb_arg
);
208 #endif /* !defined(OPENSSL_NO_DEPRECATED) */
211 int DSA_generate_parameters_ex(DSA
*dsa
, int bits
,
212 unsigned char *seed
,int seed_len
,
213 int *counter_ret
, unsigned long *h_ret
, BN_GENCB
*cb
);
215 int DSA_generate_key(DSA
*a
);
216 int i2d_DSAPublicKey(const DSA
*a
, unsigned char **pp
);
217 int i2d_DSAPrivateKey(const DSA
*a
, unsigned char **pp
);
218 int i2d_DSAparams(const DSA
*a
,unsigned char **pp
);
220 #ifndef OPENSSL_NO_BIO
221 int DSAparams_print(BIO
*bp
, const DSA
*x
);
222 int DSA_print(BIO
*bp
, const DSA
*x
, int off
);
224 #ifndef OPENSSL_NO_FP_API
225 int DSAparams_print_fp(FILE *fp
, const DSA
*x
);
226 int DSA_print_fp(FILE *bp
, const DSA
*x
, int off
);
229 #define DSS_prime_checks 50
230 /* Primality test according to FIPS PUB 186[-1], Appendix 2.1:
231 * 50 rounds of Rabin-Miller */
232 #define DSA_is_prime(n, callback, cb_arg) \
233 BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
235 #ifndef OPENSSL_NO_DH
236 /* Convert DSA structure (key or just parameters) into DH structure
237 * (be careful to avoid small subgroup attacks when using this!) */
238 DH
*DSA_dup_DH(const DSA
*r
);
241 /* BEGIN ERROR CODES */
242 /* The following lines are auto generated by the script mkerr.pl. Any changes
243 * made after this point may be overwritten when the script is next run.
245 void ERR_load_DSA_strings(void);
247 /* Error codes for the DSA functions. */
249 /* Function codes. */
250 #define DSA_F_D2I_DSA_SIG 110
251 #define DSA_F_DSAPARAMS_PRINT 100
252 #define DSA_F_DSAPARAMS_PRINT_FP 101
253 #define DSA_F_DSA_DO_SIGN 112
254 #define DSA_F_DSA_DO_VERIFY 113
255 #define DSA_F_DSA_NEW_METHOD 103
256 #define DSA_F_DSA_PRINT 104
257 #define DSA_F_DSA_PRINT_FP 105
258 #define DSA_F_DSA_SIGN 106
259 #define DSA_F_DSA_SIGN_SETUP 107
260 #define DSA_F_DSA_SIG_NEW 109
261 #define DSA_F_DSA_VERIFY 108
262 #define DSA_F_I2D_DSA_SIG 111
263 #define DSA_F_SIG_CB 114
266 #define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100
267 #define DSA_R_MISSING_PARAMETERS 101