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/crypto.h>
78 #include <openssl/ossl_typ.h>
80 #ifdef OPENSSL_USE_DEPRECATED
81 #include <openssl/bn.h>
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
94 #define DSA_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the
98 * modular exponentiation
99 * for secret exponents
100 * by default. This flag
103 * window method to be
108 /* If this flag is set the DSA method is FIPS compliant and can be used
109 * in FIPS mode. This is set in the validated module method. If an
110 * application sets this flag in its own methods it is its reposibility
111 * to ensure the result is compliant.
114 #define DSA_FLAG_FIPS_METHOD 0x0400
116 /* If this flag is set the operations normally disabled in FIPS mode are
117 * permitted it is then the applications responsibility to ensure that the
118 * usage is compliant.
121 #define DSA_FLAG_NON_FIPS_ALLOW 0x0400
122 #define DSA_FLAG_FIPS_CHECKED 0x0800
128 /* Already defined in ossl_typ.h */
129 /* typedef struct dsa_st DSA; */
130 /* typedef struct dsa_method DSA_METHOD; */
132 typedef struct DSA_SIG_st
141 DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa);
142 int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
144 int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len,
145 DSA_SIG *sig, DSA *dsa);
146 int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,
147 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx,
148 BN_MONT_CTX *in_mont);
149 int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
150 const BIGNUM *m, BN_CTX *ctx,
151 BN_MONT_CTX *m_ctx); /* Can be null */
152 int (*init)(DSA *dsa);
153 int (*finish)(DSA *dsa);
156 /* If this is non-NULL, it is used to generate DSA parameters */
157 int (*dsa_paramgen)(DSA *dsa, int bits,
158 const unsigned char *seed, int seed_len,
159 int *counter_ret, unsigned long *h_ret,
161 /* If this is non-NULL, it is used to generate DSA keys */
162 int (*dsa_keygen)(DSA *dsa);
167 /* This first variable is used to pick up errors where
168 * a DSA is passed instead of of a EVP_PKEY */
173 BIGNUM *q; /* == 20 */
176 BIGNUM *pub_key; /* y public key */
177 BIGNUM *priv_key; /* x private key */
179 BIGNUM *kinv; /* Signing pre-calc */
180 BIGNUM *r; /* Signing pre-calc */
183 /* Normally used to cache montgomery values */
184 BN_MONT_CTX *method_mont_p;
186 CRYPTO_EX_DATA ex_data;
187 const DSA_METHOD *meth;
188 /* functional reference if 'meth' is ENGINE-provided */
192 #define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
193 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
194 #define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
195 (unsigned char *)(x))
196 #define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
197 #define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x)
200 DSA *DSAparams_dup(DSA *x);
201 DSA_SIG * DSA_SIG_new(void);
202 void DSA_SIG_free(DSA_SIG *a);
203 int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
204 DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
206 DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa);
207 int DSA_do_verify(const unsigned char *dgst,int dgst_len,
208 DSA_SIG *sig,DSA *dsa);
210 const DSA_METHOD *DSA_OpenSSL(void);
212 void DSA_set_default_method(const DSA_METHOD *);
213 const DSA_METHOD *DSA_get_default_method(void);
214 int DSA_set_method(DSA *dsa, const DSA_METHOD *);
217 DSA * DSA_new_method(ENGINE *engine);
218 void DSA_free (DSA *r);
219 /* "up" the DSA object's reference count */
220 int DSA_up_ref(DSA *r);
221 int DSA_size(const DSA *);
222 int DSA_security_bits(const DSA *d);
223 /* next 4 return -1 on error */
224 int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp);
225 int DSA_sign(int type,const unsigned char *dgst,int dlen,
226 unsigned char *sig, unsigned int *siglen, DSA *dsa);
227 int DSA_verify(int type,const unsigned char *dgst,int dgst_len,
228 const unsigned char *sigbuf, int siglen, DSA *dsa);
229 int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
230 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
231 int DSA_set_ex_data(DSA *d, int idx, void *arg);
232 void *DSA_get_ex_data(DSA *d, int idx);
234 DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
235 DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
236 DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
238 /* Deprecated version */
239 #ifdef OPENSSL_USE_DEPRECATED
240 DECLARE_DEPRECATED(DSA * DSA_generate_parameters(int bits,
241 unsigned char *seed,int seed_len,
242 int *counter_ret, unsigned long *h_ret,void
243 (*callback)(int, int, void *),void *cb_arg));
244 #endif /* defined(OPENSSL_USE_DEPRECATED) */
247 int DSA_generate_parameters_ex(DSA *dsa, int bits,
248 const unsigned char *seed,int seed_len,
249 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb);
251 int DSA_generate_key(DSA *a);
252 int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
253 int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
254 int i2d_DSAparams(const DSA *a,unsigned char **pp);
256 #ifndef OPENSSL_NO_BIO
257 int DSAparams_print(BIO *bp, const DSA *x);
258 int DSA_print(BIO *bp, const DSA *x, int off);
260 #ifndef OPENSSL_NO_FP_API
261 int DSAparams_print_fp(FILE *fp, const DSA *x);
262 int DSA_print_fp(FILE *bp, const DSA *x, int off);
265 #define DSS_prime_checks 50
266 /* Primality test according to FIPS PUB 186[-1], Appendix 2.1:
267 * 50 rounds of Rabin-Miller */
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
272 /* Convert DSA structure (key or just parameters) into DH structure
273 * (be careful to avoid small subgroup attacks when using this!) */
274 DH *DSA_dup_DH(const DSA *r);
277 #define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \
278 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
279 EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL)
281 #define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS (EVP_PKEY_ALG_CTRL + 1)
282 #define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS (EVP_PKEY_ALG_CTRL + 2)
283 #define EVP_PKEY_CTRL_DSA_PARAMGEN_MD (EVP_PKEY_ALG_CTRL + 3)
285 /* 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_DO_DSA_PRINT 104
296 #define DSA_F_DSAPARAMS_PRINT 100
297 #define DSA_F_DSAPARAMS_PRINT_FP 101
298 #define DSA_F_DSA_BUILTIN_KEYGEN 124
299 #define DSA_F_DSA_BUILTIN_PARAMGEN 125
300 #define DSA_F_DSA_BUILTIN_PARAMGEN2 126
301 #define DSA_F_DSA_DO_SIGN 112
302 #define DSA_F_DSA_DO_VERIFY 113
303 #define DSA_F_DSA_NEW_METHOD 103
304 #define DSA_F_DSA_PARAM_DECODE 119
305 #define DSA_F_DSA_PRINT_FP 105
306 #define DSA_F_DSA_PRIV_DECODE 115
307 #define DSA_F_DSA_PRIV_ENCODE 116
308 #define DSA_F_DSA_PUB_DECODE 117
309 #define DSA_F_DSA_PUB_ENCODE 118
310 #define DSA_F_DSA_SIGN 106
311 #define DSA_F_DSA_SIGN_SETUP 107
312 #define DSA_F_DSA_SIG_NEW 109
313 #define DSA_F_DSA_SIG_PRINT 123
314 #define DSA_F_DSA_VERIFY 108
315 #define DSA_F_I2D_DSA_SIG 111
316 #define DSA_F_OLD_DSA_PRIV_DECODE 122
317 #define DSA_F_PKEY_DSA_CTRL 120
318 #define DSA_F_PKEY_DSA_KEYGEN 121
319 #define DSA_F_SIG_CB 114
322 #define DSA_R_BAD_Q_VALUE 102
323 #define DSA_R_BN_DECODE_ERROR 108
324 #define DSA_R_BN_ERROR 109
325 #define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100
326 #define DSA_R_DECODE_ERROR 104
327 #define DSA_R_INVALID_DIGEST_TYPE 106
328 #define DSA_R_INVALID_PARAMETERS 112
329 #define DSA_R_KEY_SIZE_TOO_SMALL 111
330 #define DSA_R_MISSING_PARAMETERS 101
331 #define DSA_R_MODULUS_TOO_LARGE 103
332 #define DSA_R_NEED_NEW_SETUP_VALUES 110
333 #define DSA_R_NO_PARAMETERS_SET 107
334 #define DSA_R_PARAMETER_ENCODING_ERROR 105
335 #define DSA_R_Q_NOT_PRIME 113