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 :-) */
74 #define DSA_FLAG_CACHE_MONT_P 0x01
78 /* This first variable is used to pick up errors where
79 * a DSA is passed instead of of a EVP_PKEY */
84 BIGNUM *q; /* == 20 */
87 BIGNUM *pub_key; /* y public key */
88 BIGNUM *priv_key; /* x private key */
90 BIGNUM *kinv; /* Signing pre-calc */
91 BIGNUM *r; /* Signing pre-calc */
94 /* Normally used to cache montgomery values */
100 #define DSAparams_dup(x) (DSA *)ASN1_dup((int (*)())i2d_DSAparams, \
101 (char *(*)())d2i_DSAparams,(char *)(x))
102 #define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
103 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
104 #define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
105 (unsigned char *)(x))
106 #define d2i_DSAparams_bio(bp,x) (DSA *)ASN1_d2i_bio((char *(*)())DSA_new, \
107 (char *(*)())d2i_DSAparams,(bp),(unsigned char **)(x))
108 #define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio(i2d_DSAparams,(bp), \
109 (unsigned char *)(x))
115 /* next 4 return -1 on error */
116 int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp);
117 int DSA_sign(int type,unsigned char *dgst,int dlen,
118 unsigned char *sig, unsigned int *siglen, DSA *dsa);
119 int DSA_verify(int type,unsigned char *dgst,int dgst_len,
120 unsigned char *sigbuf, int siglen, DSA *dsa);
121 void DSA_free (DSA *r);
123 void ERR_load_DSA_strings(void );
125 DSA * d2i_DSAPublicKey(DSA **a, unsigned char **pp, long length);
126 DSA * d2i_DSAPrivateKey(DSA **a, unsigned char **pp, long length);
127 DSA * d2i_DSAparams(DSA **a, unsigned char **pp, long length);
128 DSA * DSA_generate_parameters(int bits, unsigned char *seed,int seed_len,
129 int *counter_ret, unsigned long *h_ret,void
130 (*callback)(),char *cb_arg);
131 int DSA_generate_key(DSA *a);
132 int i2d_DSAPublicKey(DSA *a, unsigned char **pp);
133 int i2d_DSAPrivateKey(DSA *a, unsigned char **pp);
134 int i2d_DSAparams(DSA *a,unsigned char **pp);
137 int DSAparams_print(BIO *bp, DSA *x);
138 int DSA_print(BIO *bp, DSA *x, int off);
141 int DSAparams_print_fp(FILE *fp, DSA *x);
142 int DSA_print_fp(FILE *bp, DSA *x, int off);
145 int DSA_is_prime(BIGNUM *q,void (*callback)(),char *cb_arg);
151 int DSA_sign_setup();
156 void ERR_load_DSA_strings();
158 DSA * d2i_DSAPublicKey();
159 DSA * d2i_DSAPrivateKey();
160 DSA * d2i_DSAparams();
161 DSA * DSA_generate_parameters();
162 int DSA_generate_key();
163 int i2d_DSAPublicKey();
164 int i2d_DSAPrivateKey();
169 int DSAparams_print();
173 int DSAparams_print_fp();
179 /* BEGIN ERROR CODES */
180 /* Error codes for the DSA functions. */
182 /* Function codes. */
183 #define DSA_F_DSAPARAMS_PRINT 100
184 #define DSA_F_DSAPARAMS_PRINT_FP 101
185 #define DSA_F_DSA_IS_PRIME 102
186 #define DSA_F_DSA_NEW 103
187 #define DSA_F_DSA_PRINT 104
188 #define DSA_F_DSA_PRINT_FP 105
189 #define DSA_F_DSA_SIGN 106
190 #define DSA_F_DSA_SIGN_SETUP 107
191 #define DSA_F_DSA_VERIFY 108
194 #define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100