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>
70 # ifdef OPENSSL_NO_DSA
71 # error DSA is disabled.
74 # ifndef OPENSSL_NO_BIO
75 # include <openssl/bio.h>
77 # include <openssl/crypto.h>
78 # include <openssl/ossl_typ.h>
80 # ifndef OPENSSL_NO_DEPRECATED
81 # include <openssl/bn.h>
82 # ifndef OPENSSL_NO_DH
83 # include <openssl/dh.h>
87 # ifndef OPENSSL_DSA_MAX_MODULUS_BITS
88 # define OPENSSL_DSA_MAX_MODULUS_BITS 10000
91 # define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024
93 # define DSA_FLAG_CACHE_MONT_P 0x01
95 * new with 0.9.7h; the built-in DSA implementation now uses constant time
96 * modular exponentiation for secret exponents by default. This flag causes
97 * the faster variable sliding window method to be used for all exponents.
99 # define DSA_FLAG_NO_EXP_CONSTTIME 0x02
102 * If this flag is set the DSA method is FIPS compliant and can be used in
103 * FIPS mode. This is set in the validated module method. If an application
104 * sets this flag in its own methods it is its reposibility to ensure the
105 * result is compliant.
108 # define DSA_FLAG_FIPS_METHOD 0x0400
111 * If this flag is set the operations normally disabled in FIPS mode are
112 * permitted it is then the applications responsibility to ensure that the
113 * usage is compliant.
116 # define DSA_FLAG_NON_FIPS_ALLOW 0x0400
119 # define FIPS_DSA_SIZE_T int
126 /* Already defined in ossl_typ.h */
127 /* typedef struct dsa_st DSA; */
128 /* typedef struct dsa_method DSA_METHOD; */
130 typedef struct DSA_SIG_st {
137 DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa);
138 int (*dsa_sign_setup) (DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
140 int (*dsa_do_verify) (const unsigned char *dgst, int dgst_len,
141 DSA_SIG *sig, DSA *dsa);
142 int (*dsa_mod_exp) (DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,
143 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx,
144 BN_MONT_CTX *in_mont);
146 int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
147 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
148 int (*init) (DSA *dsa);
149 int (*finish) (DSA *dsa);
152 /* If this is non-NULL, it is used to generate DSA parameters */
153 int (*dsa_paramgen) (DSA *dsa, int bits,
154 unsigned char *seed, int seed_len,
155 int *counter_ret, unsigned long *h_ret,
157 /* If this is non-NULL, it is used to generate DSA keys */
158 int (*dsa_keygen) (DSA *dsa);
163 * This first variable is used to pick up errors where a DSA is passed
164 * instead of of a EVP_PKEY
170 BIGNUM *q; /* == 20 */
172 BIGNUM *pub_key; /* y public key */
173 BIGNUM *priv_key; /* x private key */
174 BIGNUM *kinv; /* Signing pre-calc */
175 BIGNUM *r; /* Signing pre-calc */
177 /* Normally used to cache montgomery values */
178 BN_MONT_CTX *method_mont_p;
180 CRYPTO_EX_DATA ex_data;
181 const DSA_METHOD *meth;
182 /* functional reference if 'meth' is ENGINE-provided */
186 # define DSAparams_dup(x) ASN1_dup_of_const(DSA,i2d_DSAparams,d2i_DSAparams,x)
187 # define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
188 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
189 # define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
190 (unsigned char *)(x))
191 # define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
192 # define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x)
194 DSA_SIG *DSA_SIG_new(void);
195 void DSA_SIG_free(DSA_SIG *a);
196 int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
197 DSA_SIG *d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
199 DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
200 int DSA_do_verify(const unsigned char *dgst, int dgst_len,
201 DSA_SIG *sig, DSA *dsa);
203 const DSA_METHOD *DSA_OpenSSL(void);
205 void DSA_set_default_method(const DSA_METHOD *);
206 const DSA_METHOD *DSA_get_default_method(void);
207 int DSA_set_method(DSA *dsa, const DSA_METHOD *);
210 DSA *FIPS_dsa_new(void);
211 void FIPS_dsa_free(DSA *r);
215 DSA *DSA_new_method(ENGINE *engine);
216 void DSA_free(DSA *r);
217 /* "up" the DSA object's reference count */
218 int DSA_up_ref(DSA *r);
219 int DSA_size(const DSA *);
220 /* next 4 return -1 on error */
221 int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp);
222 int DSA_sign(int type, const unsigned char *dgst, int dlen,
223 unsigned char *sig, unsigned int *siglen, DSA *dsa);
224 int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
225 const unsigned char *sigbuf, int siglen, DSA *dsa);
226 int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
227 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
228 int DSA_set_ex_data(DSA *d, int idx, void *arg);
229 void *DSA_get_ex_data(DSA *d, int idx);
231 DSA *d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
232 DSA *d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
233 DSA *d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
235 /* Deprecated version */
236 # ifndef OPENSSL_NO_DEPRECATED
237 DSA *DSA_generate_parameters(int bits,
238 unsigned char *seed, int seed_len,
239 int *counter_ret, unsigned long *h_ret, void
240 (*callback) (int, int, void *), void *cb_arg);
241 # endif /* !defined(OPENSSL_NO_DEPRECATED) */
244 int DSA_generate_parameters_ex(DSA *dsa, int bits,
245 unsigned char *seed, int seed_len,
246 int *counter_ret, unsigned long *h_ret,
249 int DSA_generate_key(DSA *a);
250 int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
251 int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
252 int i2d_DSAparams(const DSA *a, unsigned char **pp);
254 # ifndef OPENSSL_NO_BIO
255 int DSAparams_print(BIO *bp, const DSA *x);
256 int DSA_print(BIO *bp, const DSA *x, int off);
258 # ifndef OPENSSL_NO_FP_API
259 int DSAparams_print_fp(FILE *fp, const DSA *x);
260 int DSA_print_fp(FILE *bp, const DSA *x, int off);
263 # define DSS_prime_checks 50
265 * Primality test according to FIPS PUB 186[-1], Appendix 2.1: 50 rounds of
268 # define DSA_is_prime(n, callback, cb_arg) \
269 BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
271 # ifndef OPENSSL_NO_DH
273 * Convert DSA structure (key or just parameters) into DH structure (be
274 * careful to avoid small subgroup attacks when using this!)
276 DH *DSA_dup_DH(const DSA *r);
280 int FIPS_dsa_sig_encode(unsigned char *out, DSA_SIG *sig);
281 int FIPS_dsa_sig_decode(DSA_SIG *sig, const unsigned char *in, int inlen);
284 /* BEGIN ERROR CODES */
286 * The following lines are auto generated by the script mkerr.pl. Any changes
287 * made after this point may be overwritten when the script is next run.
289 void ERR_load_DSA_strings(void);
291 /* Error codes for the DSA functions. */
293 /* Function codes. */
294 # define DSA_F_D2I_DSA_SIG 110
295 # define DSA_F_DSAPARAMS_PRINT 100
296 # define DSA_F_DSAPARAMS_PRINT_FP 101
297 # define DSA_F_DSA_BUILTIN_KEYGEN 119
298 # define DSA_F_DSA_BUILTIN_PARAMGEN 118
299 # define DSA_F_DSA_DO_SIGN 112
300 # define DSA_F_DSA_DO_VERIFY 113
301 # define DSA_F_DSA_GENERATE_PARAMETERS 117
302 # define DSA_F_DSA_NEW_METHOD 103
303 # define DSA_F_DSA_PRINT 104
304 # define DSA_F_DSA_PRINT_FP 105
305 # define DSA_F_DSA_SET_DEFAULT_METHOD 115
306 # define DSA_F_DSA_SET_METHOD 116
307 # define DSA_F_DSA_SIGN 106
308 # define DSA_F_DSA_SIGN_SETUP 107
309 # define DSA_F_DSA_SIG_NEW 109
310 # define DSA_F_DSA_VERIFY 108
311 # define DSA_F_I2D_DSA_SIG 111
312 # define DSA_F_SIG_CB 114
315 # define DSA_R_BAD_Q_VALUE 102
316 # define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100
317 # define DSA_R_KEY_SIZE_TOO_SMALL 106
318 # define DSA_R_MISSING_PARAMETERS 101
319 # define DSA_R_MODULUS_TOO_LARGE 103
320 # define DSA_R_NON_FIPS_METHOD 104
321 # define DSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE 105