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authorcvs2svn <admin@example.com>2009-06-25 14:33:51 +0000
committercvs2svn <admin@example.com>2009-06-25 14:33:51 +0000
commit3944e6efcea0baa7128a89353d149b37100c0ece (patch)
tree64c1ad6d7af88839fd67d630ca81c768fd1191cd /src/lib/libcrypto/dsa/dsa.h
parent2eabc3aa42ad7d46a1723621f8e34e533342f67a (diff)
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1/* crypto/dsa/dsa.h */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59/*
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 :-) */
64
65#ifndef HEADER_DSA_H
66#define HEADER_DSA_H
67
68#include <openssl/e_os2.h>
69
70#ifdef OPENSSL_NO_DSA
71#error DSA is disabled.
72#endif
73
74#ifndef OPENSSL_NO_BIO
75#include <openssl/bio.h>
76#endif
77#include <openssl/crypto.h>
78#include <openssl/ossl_typ.h>
79
80#ifndef OPENSSL_NO_DEPRECATED
81#include <openssl/bn.h>
82#ifndef OPENSSL_NO_DH
83# include <openssl/dh.h>
84#endif
85#endif
86
87#ifndef OPENSSL_DSA_MAX_MODULUS_BITS
88# define OPENSSL_DSA_MAX_MODULUS_BITS 10000
89#endif
90
91#define OPENSSL_DSA_FIPS_MIN_MODULUS_BITS 1024
92
93#define DSA_FLAG_CACHE_MONT_P 0x01
94#define DSA_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DSA
95 * implementation now uses constant time
96 * modular exponentiation for secret exponents
97 * by default. This flag causes the
98 * faster variable sliding window method to
99 * be used for all exponents.
100 */
101
102/* If this flag is set the DSA method is FIPS compliant and can be used
103 * in FIPS mode. This is set in the validated module method. If an
104 * application sets this flag in its own methods it is its reposibility
105 * to ensure the result is compliant.
106 */
107
108#define DSA_FLAG_FIPS_METHOD 0x0400
109
110/* If this flag is set the operations normally disabled in FIPS mode are
111 * permitted it is then the applications responsibility to ensure that the
112 * usage is compliant.
113 */
114
115#define DSA_FLAG_NON_FIPS_ALLOW 0x0400
116
117#ifdef OPENSSL_FIPS
118#define FIPS_DSA_SIZE_T int
119#endif
120
121#ifdef __cplusplus
122extern "C" {
123#endif
124
125/* Already defined in ossl_typ.h */
126/* typedef struct dsa_st DSA; */
127/* typedef struct dsa_method DSA_METHOD; */
128
129typedef struct DSA_SIG_st
130 {
131 BIGNUM *r;
132 BIGNUM *s;
133 } DSA_SIG;
134
135struct dsa_method
136 {
137 const char *name;
138 DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa);
139 int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
140 BIGNUM **rp);
141 int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len,
142 DSA_SIG *sig, DSA *dsa);
143 int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,
144 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx,
145 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,
148 BN_MONT_CTX *m_ctx); /* Can be null */
149 int (*init)(DSA *dsa);
150 int (*finish)(DSA *dsa);
151 int flags;
152 char *app_data;
153 /* If this is non-NULL, it is used to generate DSA parameters */
154 int (*dsa_paramgen)(DSA *dsa, int bits,
155 unsigned char *seed, int seed_len,
156 int *counter_ret, unsigned long *h_ret,
157 BN_GENCB *cb);
158 /* If this is non-NULL, it is used to generate DSA keys */
159 int (*dsa_keygen)(DSA *dsa);
160 };
161
162struct dsa_st
163 {
164 /* This first variable is used to pick up errors where
165 * a DSA is passed instead of of a EVP_PKEY */
166 int pad;
167 long version;
168 int write_params;
169 BIGNUM *p;
170 BIGNUM *q; /* == 20 */
171 BIGNUM *g;
172
173 BIGNUM *pub_key; /* y public key */
174 BIGNUM *priv_key; /* x private key */
175
176 BIGNUM *kinv; /* Signing pre-calc */
177 BIGNUM *r; /* Signing pre-calc */
178
179 int flags;
180 /* Normally used to cache montgomery values */
181 BN_MONT_CTX *method_mont_p;
182 int references;
183 CRYPTO_EX_DATA ex_data;
184 const DSA_METHOD *meth;
185 /* functional reference if 'meth' is ENGINE-provided */
186 ENGINE *engine;
187 };
188
189#define DSAparams_dup(x) ASN1_dup_of_const(DSA,i2d_DSAparams,d2i_DSAparams,x)
190#define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
191 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
192#define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
193 (unsigned char *)(x))
194#define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x)
195#define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x)
196
197
198DSA_SIG * DSA_SIG_new(void);
199void DSA_SIG_free(DSA_SIG *a);
200int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
201DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
202
203DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa);
204int DSA_do_verify(const unsigned char *dgst,int dgst_len,
205 DSA_SIG *sig,DSA *dsa);
206
207const DSA_METHOD *DSA_OpenSSL(void);
208
209void DSA_set_default_method(const DSA_METHOD *);
210const DSA_METHOD *DSA_get_default_method(void);
211int DSA_set_method(DSA *dsa, const DSA_METHOD *);
212
213#ifdef OPENSSL_FIPS
214DSA * FIPS_dsa_new(void);
215void FIPS_dsa_free (DSA *r);
216#endif
217
218DSA * DSA_new(void);
219DSA * DSA_new_method(ENGINE *engine);
220void DSA_free (DSA *r);
221/* "up" the DSA object's reference count */
222int DSA_up_ref(DSA *r);
223int DSA_size(const DSA *);
224 /* next 4 return -1 on error */
225int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp);
226int DSA_sign(int type,const unsigned char *dgst,int dlen,
227 unsigned char *sig, unsigned int *siglen, DSA *dsa);
228int DSA_verify(int type,const unsigned char *dgst,int dgst_len,
229 const unsigned char *sigbuf, int siglen, DSA *dsa);
230int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
231 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
232int DSA_set_ex_data(DSA *d, int idx, void *arg);
233void *DSA_get_ex_data(DSA *d, int idx);
234
235DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
236DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
237DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
238
239/* Deprecated version */
240#ifndef OPENSSL_NO_DEPRECATED
241DSA * DSA_generate_parameters(int bits,
242 unsigned char *seed,int seed_len,
243 int *counter_ret, unsigned long *h_ret,void
244 (*callback)(int, int, void *),void *cb_arg);
245#endif /* !defined(OPENSSL_NO_DEPRECATED) */
246
247/* New version */
248int DSA_generate_parameters_ex(DSA *dsa, int bits,
249 unsigned char *seed,int seed_len,
250 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb);
251
252int DSA_generate_key(DSA *a);
253int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
254int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
255int i2d_DSAparams(const DSA *a,unsigned char **pp);
256
257#ifndef OPENSSL_NO_BIO
258int DSAparams_print(BIO *bp, const DSA *x);
259int DSA_print(BIO *bp, const DSA *x, int off);
260#endif
261#ifndef OPENSSL_NO_FP_API
262int DSAparams_print_fp(FILE *fp, const DSA *x);
263int DSA_print_fp(FILE *bp, const DSA *x, int off);
264#endif
265
266#define DSS_prime_checks 50
267/* Primality test according to FIPS PUB 186[-1], Appendix 2.1:
268 * 50 rounds of Rabin-Miller */
269#define DSA_is_prime(n, callback, cb_arg) \
270 BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
271
272#ifndef OPENSSL_NO_DH
273/* Convert DSA structure (key or just parameters) into DH structure
274 * (be careful to avoid small subgroup attacks when using this!) */
275DH *DSA_dup_DH(const DSA *r);
276#endif
277
278#ifdef OPENSSL_FIPS
279int FIPS_dsa_sig_encode(unsigned char *out, DSA_SIG *sig);
280int FIPS_dsa_sig_decode(DSA_SIG *sig, const unsigned char *in, int inlen);
281#endif
282
283/* BEGIN ERROR CODES */
284/* The following lines are auto generated by the script mkerr.pl. Any changes
285 * made after this point may be overwritten when the script is next run.
286 */
287void ERR_load_DSA_strings(void);
288
289/* Error codes for the DSA functions. */
290
291/* Function codes. */
292#define DSA_F_D2I_DSA_SIG 110
293#define DSA_F_DSAPARAMS_PRINT 100
294#define DSA_F_DSAPARAMS_PRINT_FP 101
295#define DSA_F_DSA_BUILTIN_KEYGEN 119
296#define DSA_F_DSA_BUILTIN_PARAMGEN 118
297#define DSA_F_DSA_DO_SIGN 112
298#define DSA_F_DSA_DO_VERIFY 113
299#define DSA_F_DSA_GENERATE_PARAMETERS 117
300#define DSA_F_DSA_NEW_METHOD 103
301#define DSA_F_DSA_PRINT 104
302#define DSA_F_DSA_PRINT_FP 105
303#define DSA_F_DSA_SET_DEFAULT_METHOD 115
304#define DSA_F_DSA_SET_METHOD 116
305#define DSA_F_DSA_SIGN 106
306#define DSA_F_DSA_SIGN_SETUP 107
307#define DSA_F_DSA_SIG_NEW 109
308#define DSA_F_DSA_VERIFY 108
309#define DSA_F_I2D_DSA_SIG 111
310#define DSA_F_SIG_CB 114
311
312/* Reason codes. */
313#define DSA_R_BAD_Q_VALUE 102
314#define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100
315#define DSA_R_KEY_SIZE_TOO_SMALL 106
316#define DSA_R_MISSING_PARAMETERS 101
317#define DSA_R_MODULUS_TOO_LARGE 103
318#define DSA_R_NON_FIPS_METHOD 104
319#define DSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE 105
320
321#ifdef __cplusplus
322}
323#endif
324#endif
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