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1/* $OpenBSD: dsa.h,v 1.48 2025/03/01 11:33:07 tb Exp $ */
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/opensslconf.h>
69
70#ifndef OPENSSL_NO_BIO
71#include <openssl/bio.h>
72#endif
73#include <openssl/bn.h>
74#include <openssl/crypto.h>
75#ifndef OPENSSL_NO_DH
76# include <openssl/dh.h>
77#endif
78
79#include <openssl/ossl_typ.h>
80
81#ifndef OPENSSL_DSA_MAX_MODULUS_BITS
82# define OPENSSL_DSA_MAX_MODULUS_BITS 10000
83#endif
84
85#define DSA_FLAG_CACHE_MONT_P 0x01
86
87/* If this flag is set the DSA method is FIPS compliant and can be used
88 * in FIPS mode. This is set in the validated module method. If an
89 * application sets this flag in its own methods it is its reposibility
90 * to ensure the result is compliant.
91 */
92
93#define DSA_FLAG_FIPS_METHOD 0x0400
94
95/* If this flag is set the operations normally disabled in FIPS mode are
96 * permitted it is then the applications responsibility to ensure that the
97 * usage is compliant.
98 */
99
100#define DSA_FLAG_NON_FIPS_ALLOW 0x0400
101
102#ifdef __cplusplus
103extern "C" {
104#endif
105
106typedef struct DSA_SIG_st DSA_SIG;
107
108DSA *d2i_DSAparams_bio(BIO *bp, DSA **a);
109int i2d_DSAparams_bio(BIO *bp, DSA *a);
110DSA *d2i_DSAparams_fp(FILE *fp, DSA **a);
111int i2d_DSAparams_fp(FILE *fp, DSA *a);
112
113DSA *DSAparams_dup(DSA *x);
114DSA_SIG * DSA_SIG_new(void);
115void DSA_SIG_free(DSA_SIG *a);
116int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
117DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
118void DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
119int DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s);
120
121DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa);
122int DSA_do_verify(const unsigned char *dgst,int dgst_len,
123 DSA_SIG *sig,DSA *dsa);
124
125const DSA_METHOD *DSA_OpenSSL(void);
126
127void DSA_set_default_method(const DSA_METHOD *);
128const DSA_METHOD *DSA_get_default_method(void);
129int DSA_set_method(DSA *dsa, const DSA_METHOD *);
130
131DSA * DSA_new(void);
132DSA * DSA_new_method(ENGINE *engine);
133void DSA_free(DSA *r);
134/* "up" the DSA object's reference count */
135int DSA_up_ref(DSA *r);
136int DSA_size(const DSA *);
137int DSA_bits(const DSA *d);
138 /* next 4 return -1 on error */
139int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp);
140int DSA_sign(int type,const unsigned char *dgst,int dlen,
141 unsigned char *sig, unsigned int *siglen, DSA *dsa);
142int DSA_verify(int type,const unsigned char *dgst,int dgst_len,
143 const unsigned char *sigbuf, int siglen, DSA *dsa);
144int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
145 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
146int DSA_set_ex_data(DSA *d, int idx, void *arg);
147void *DSA_get_ex_data(DSA *d, int idx);
148int DSA_security_bits(const DSA *d);
149
150DSA *d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
151int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
152extern const ASN1_ITEM DSAPublicKey_it;
153
154DSA *d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
155int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
156extern const ASN1_ITEM DSAPrivateKey_it;
157
158DSA *d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
159int i2d_DSAparams(const DSA *a,unsigned char **pp);
160extern const ASN1_ITEM DSAparams_it;
161
162/* New version */
163int DSA_generate_parameters_ex(DSA *dsa, int bits,
164 const unsigned char *seed,int seed_len,
165 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb);
166
167int DSA_generate_key(DSA *a);
168
169#ifndef OPENSSL_NO_BIO
170int DSAparams_print(BIO *bp, const DSA *x);
171int DSA_print(BIO *bp, const DSA *x, int off);
172#endif
173int DSAparams_print_fp(FILE *fp, const DSA *x);
174int DSA_print_fp(FILE *bp, const DSA *x, int off);
175
176#ifndef OPENSSL_NO_DH
177/* Convert DSA structure (key or just parameters) into DH structure
178 * (be careful to avoid small subgroup attacks when using this!) */
179DH *DSA_dup_DH(const DSA *r);
180#endif
181
182void DSA_get0_pqg(const DSA *d, const BIGNUM **p, const BIGNUM **q,
183 const BIGNUM **g);
184int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g);
185void DSA_get0_key(const DSA *d, const BIGNUM **pub_key, const BIGNUM **priv_key);
186int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key);
187const BIGNUM *DSA_get0_p(const DSA *d);
188const BIGNUM *DSA_get0_q(const DSA *d);
189const BIGNUM *DSA_get0_g(const DSA *d);
190const BIGNUM *DSA_get0_pub_key(const DSA *d);
191const BIGNUM *DSA_get0_priv_key(const DSA *d);
192void DSA_clear_flags(DSA *d, int flags);
193int DSA_test_flags(const DSA *d, int flags);
194void DSA_set_flags(DSA *d, int flags);
195ENGINE *DSA_get0_engine(DSA *d);
196
197DSA_METHOD *DSA_meth_new(const char *name, int flags);
198void DSA_meth_free(DSA_METHOD *meth);
199DSA_METHOD *DSA_meth_dup(const DSA_METHOD *meth);
200const char *DSA_meth_get0_name(const DSA_METHOD *meth);
201int DSA_meth_set1_name(DSA_METHOD *meth, const char *name);
202int DSA_meth_set_sign(DSA_METHOD *meth,
203 DSA_SIG *(*sign)(const unsigned char *, int, DSA *));
204int DSA_meth_set_finish(DSA_METHOD *meth, int (*finish)(DSA *));
205
206#define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \
207 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \
208 EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL)
209
210#define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS (EVP_PKEY_ALG_CTRL + 1)
211#define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS (EVP_PKEY_ALG_CTRL + 2)
212#define EVP_PKEY_CTRL_DSA_PARAMGEN_MD (EVP_PKEY_ALG_CTRL + 3)
213
214void ERR_load_DSA_strings(void);
215
216/* Error codes for the DSA functions. */
217
218/* Function codes. */
219#define DSA_F_D2I_DSA_SIG 110
220#define DSA_F_DO_DSA_PRINT 104
221#define DSA_F_DSAPARAMS_PRINT 100
222#define DSA_F_DSAPARAMS_PRINT_FP 101
223#define DSA_F_DSA_DO_SIGN 112
224#define DSA_F_DSA_DO_VERIFY 113
225#define DSA_F_DSA_GENERATE_KEY 124
226#define DSA_F_DSA_GENERATE_PARAMETERS_EX 123
227#define DSA_F_DSA_NEW_METHOD 103
228#define DSA_F_DSA_PARAM_DECODE 119
229#define DSA_F_DSA_PRINT_FP 105
230#define DSA_F_DSA_PRIV_DECODE 115
231#define DSA_F_DSA_PRIV_ENCODE 116
232#define DSA_F_DSA_PUB_DECODE 117
233#define DSA_F_DSA_PUB_ENCODE 118
234#define DSA_F_DSA_SIGN 106
235#define DSA_F_DSA_SIGN_SETUP 107
236#define DSA_F_DSA_SIG_NEW 109
237#define DSA_F_DSA_SIG_PRINT 125
238#define DSA_F_DSA_VERIFY 108
239#define DSA_F_I2D_DSA_SIG 111
240#define DSA_F_OLD_DSA_PRIV_DECODE 122
241#define DSA_F_PKEY_DSA_CTRL 120
242#define DSA_F_PKEY_DSA_KEYGEN 121
243#define DSA_F_SIG_CB 114
244
245/* Reason codes. */
246#define DSA_R_BAD_Q_VALUE 102
247#define DSA_R_BN_DECODE_ERROR 108
248#define DSA_R_BN_ERROR 109
249#define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100
250#define DSA_R_DECODE_ERROR 104
251#define DSA_R_INVALID_DIGEST_TYPE 106
252#define DSA_R_INVALID_PARAMETERS 112
253#define DSA_R_MISSING_PARAMETERS 101
254#define DSA_R_MODULUS_TOO_LARGE 103
255#define DSA_R_NEED_NEW_SETUP_VALUES 110
256#define DSA_R_NON_FIPS_DSA_METHOD 111
257#define DSA_R_NO_PARAMETERS_SET 107
258#define DSA_R_PARAMETER_ENCODING_ERROR 105
259
260#ifdef __cplusplus
261}
262#endif
263#endif
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