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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#ifdef __cplusplus
69extern "C" {
70#endif
71
72#ifdef NO_DSA
73#error DSA is disabled.
74#endif
75
76#include <openssl/bn.h>
77#ifndef NO_DH
78# include <openssl/dh.h>
79#endif
80
81#define DSA_FLAG_CACHE_MONT_P 0x01
82
83typedef struct dsa_st
84 {
85 /* This first variable is used to pick up errors where
86 * a DSA is passed instead of of a EVP_PKEY */
87 int pad;
88 int version;
89 int write_params;
90 BIGNUM *p;
91 BIGNUM *q; /* == 20 */
92 BIGNUM *g;
93
94 BIGNUM *pub_key; /* y public key */
95 BIGNUM *priv_key; /* x private key */
96
97 BIGNUM *kinv; /* Signing pre-calc */
98 BIGNUM *r; /* Signing pre-calc */
99
100 int flags;
101 /* Normally used to cache montgomery values */
102 char *method_mont_p;
103
104 int references;
105 } DSA;
106
107typedef struct DSA_SIG_st
108 {
109 BIGNUM *r;
110 BIGNUM *s;
111 } DSA_SIG;
112
113#define DSAparams_dup(x) (DSA *)ASN1_dup((int (*)())i2d_DSAparams, \
114 (char *(*)())d2i_DSAparams,(char *)(x))
115#define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
116 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
117#define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
118 (unsigned char *)(x))
119#define d2i_DSAparams_bio(bp,x) (DSA *)ASN1_d2i_bio((char *(*)())DSA_new, \
120 (char *(*)())d2i_DSAparams,(bp),(unsigned char **)(x))
121#define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio(i2d_DSAparams,(bp), \
122 (unsigned char *)(x))
123
124
125DSA_SIG * DSA_SIG_new(void);
126void DSA_SIG_free(DSA_SIG *a);
127int i2d_DSA_SIG(DSA_SIG *a, unsigned char **pp);
128DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, unsigned char **pp, long length);
129
130DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa);
131int DSA_do_verify(const unsigned char *dgst,int dgst_len,
132 DSA_SIG *sig,DSA *dsa);
133
134DSA * DSA_new(void);
135int DSA_size(DSA *);
136 /* next 4 return -1 on error */
137int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp);
138int DSA_sign(int type,const unsigned char *dgst,int dlen,
139 unsigned char *sig, unsigned int *siglen, DSA *dsa);
140int DSA_verify(int type,const unsigned char *dgst,int dgst_len,
141 unsigned char *sigbuf, int siglen, DSA *dsa);
142void DSA_free (DSA *r);
143
144void ERR_load_DSA_strings(void );
145
146DSA * d2i_DSAPublicKey(DSA **a, unsigned char **pp, long length);
147DSA * d2i_DSAPrivateKey(DSA **a, unsigned char **pp, long length);
148DSA * d2i_DSAparams(DSA **a, unsigned char **pp, long length);
149DSA * DSA_generate_parameters(int bits, unsigned char *seed,int seed_len,
150 int *counter_ret, unsigned long *h_ret,void
151 (*callback)(),char *cb_arg);
152int DSA_generate_key(DSA *a);
153int i2d_DSAPublicKey(DSA *a, unsigned char **pp);
154int i2d_DSAPrivateKey(DSA *a, unsigned char **pp);
155int i2d_DSAparams(DSA *a,unsigned char **pp);
156
157#ifdef HEADER_BIO_H
158int DSAparams_print(BIO *bp, DSA *x);
159int DSA_print(BIO *bp, DSA *x, int off);
160#endif
161#ifndef NO_FP_API
162int DSAparams_print_fp(FILE *fp, DSA *x);
163int DSA_print_fp(FILE *bp, DSA *x, int off);
164#endif
165
166int DSA_is_prime(BIGNUM *q,void (*callback)(),char *cb_arg);
167
168#ifndef NO_DH
169/* Convert DSA structure (key or just parameters) into DH structure
170 * (be careful to avoid small subgroup attacks when using this!) */
171DH *DSA_dup_DH(DSA *r);
172#endif
173
174/* BEGIN ERROR CODES */
175/* The following lines are auto generated by the script mkerr.pl. Any changes
176 * made after this point may be overwritten when the script is next run.
177 */
178
179/* Error codes for the DSA functions. */
180
181/* Function codes. */
182#define DSA_F_D2I_DSA_SIG 110
183#define DSA_F_DSAPARAMS_PRINT 100
184#define DSA_F_DSAPARAMS_PRINT_FP 101
185#define DSA_F_DSA_DO_SIGN 112
186#define DSA_F_DSA_DO_VERIFY 113
187#define DSA_F_DSA_IS_PRIME 102
188#define DSA_F_DSA_NEW 103
189#define DSA_F_DSA_PRINT 104
190#define DSA_F_DSA_PRINT_FP 105
191#define DSA_F_DSA_SIGN 106
192#define DSA_F_DSA_SIGN_SETUP 107
193#define DSA_F_DSA_SIG_NEW 109
194#define DSA_F_DSA_VERIFY 108
195#define DSA_F_I2D_DSA_SIG 111
196
197/* Reason codes. */
198#define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100
199
200#ifdef __cplusplus
201}
202#endif
203#endif
204
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