dh.h 9.75 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
/* crypto/dh/dh.h */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#ifndef HEADER_DH_H
#define HEADER_DH_H

#include <openssl/e_os2.h>

#ifdef OPENSSL_NO_DH
#error DH is disabled.
#endif

#ifndef OPENSSL_NO_BIO
#include <openssl/bio.h>
#endif
#include <openssl/ossl_typ.h>
#ifndef OPENSSL_NO_DEPRECATED
#include <openssl/bn.h>
#endif
	
#ifndef OPENSSL_DH_MAX_MODULUS_BITS
# define OPENSSL_DH_MAX_MODULUS_BITS	10000
#endif

#define DH_FLAG_CACHE_MONT_P     0x01
#define DH_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DH
                                       * implementation now uses constant time
                                       * modular exponentiation for secret exponents
                                       * by default. This flag causes the
                                       * faster variable sliding window method to
                                       * be used for all exponents.
                                       */

/* If this flag is set the DH method is FIPS compliant and can be used
 * in FIPS mode. This is set in the validated module method. If an
 * application sets this flag in its own methods it is its reposibility
 * to ensure the result is compliant.
 */

#define DH_FLAG_FIPS_METHOD			0x0400

/* If this flag is set the operations normally disabled in FIPS mode are
 * permitted it is then the applications responsibility to ensure that the
 * usage is compliant.
 */

#define DH_FLAG_NON_FIPS_ALLOW			0x0400

#ifdef  __cplusplus
extern "C" {
#endif

/* Already defined in ossl_typ.h */
/* typedef struct dh_st DH; */
/* typedef struct dh_method DH_METHOD; */

struct dh_method
	{
	const char *name;
	/* Methods here */
	int (*generate_key)(DH *dh);
	int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh);
	int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a,
				const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
				BN_MONT_CTX *m_ctx); /* Can be null */

	int (*init)(DH *dh);
	int (*finish)(DH *dh);
	int flags;
	char *app_data;
	/* If this is non-NULL, it will be used to generate parameters */
	int (*generate_params)(DH *dh, int prime_len, int generator, BN_GENCB *cb);
	};

struct dh_st
	{
	/* This first argument is used to pick up errors when
	 * a DH is passed instead of a EVP_PKEY */
	int pad;
	int version;
	BIGNUM *p;
	BIGNUM *g;
	long length; /* optional */
	BIGNUM *pub_key;	/* g^x */
	BIGNUM *priv_key;	/* x */

	int flags;
	BN_MONT_CTX *method_mont_p;
	/* Place holders if we want to do X9.42 DH */
	BIGNUM *q;
	BIGNUM *j;
	unsigned char *seed;
	int seedlen;
	BIGNUM *counter;

	int references;
	CRYPTO_EX_DATA ex_data;
	const DH_METHOD *meth;
	ENGINE *engine;
	};

#define DH_GENERATOR_2		2
/* #define DH_GENERATOR_3	3 */
#define DH_GENERATOR_5		5

/* DH_check error codes */
#define DH_CHECK_P_NOT_PRIME		0x01
#define DH_CHECK_P_NOT_SAFE_PRIME	0x02
#define DH_UNABLE_TO_CHECK_GENERATOR	0x04
#define DH_NOT_SUITABLE_GENERATOR	0x08

/* DH_check_pub_key error codes */
#define DH_CHECK_PUBKEY_TOO_SMALL	0x01
#define DH_CHECK_PUBKEY_TOO_LARGE	0x02

/* primes p where (p-1)/2 is prime too are called "safe"; we define
   this for backward compatibility: */
#define DH_CHECK_P_NOT_STRONG_PRIME	DH_CHECK_P_NOT_SAFE_PRIME

#define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
		(char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
#define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
		(unsigned char *)(x))
#define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x)
#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x)

DH *DHparams_dup(DH *);

const DH_METHOD *DH_OpenSSL(void);

void DH_set_default_method(const DH_METHOD *meth);
const DH_METHOD *DH_get_default_method(void);
int DH_set_method(DH *dh, const DH_METHOD *meth);
DH *DH_new_method(ENGINE *engine);

DH *	DH_new(void);
void	DH_free(DH *dh);
int	DH_up_ref(DH *dh);
int	DH_size(const DH *dh);
int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
int DH_set_ex_data(DH *d, int idx, void *arg);
void *DH_get_ex_data(DH *d, int idx);

/* Deprecated version */
#ifndef OPENSSL_NO_DEPRECATED
DH *	DH_generate_parameters(int prime_len,int generator,
		void (*callback)(int,int,void *),void *cb_arg);
#endif /* !defined(OPENSSL_NO_DEPRECATED) */

/* New version */
int	DH_generate_parameters_ex(DH *dh, int prime_len,int generator, BN_GENCB *cb);

int	DH_check(const DH *dh,int *codes);
int	DH_check_pub_key(const DH *dh,const BIGNUM *pub_key, int *codes);
int	DH_generate_key(DH *dh);
int	DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh);
DH *	d2i_DHparams(DH **a,const unsigned char **pp, long length);
int	i2d_DHparams(const DH *a,unsigned char **pp);
#ifndef OPENSSL_NO_FP_API
int	DHparams_print_fp(FILE *fp, const DH *x);
#endif
#ifndef OPENSSL_NO_BIO
int	DHparams_print(BIO *bp, const DH *x);
#else
int	DHparams_print(char *bp, const DH *x);
#endif

#define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \
	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
			EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, len, NULL)

#define EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, gen) \
	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
			EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL)

#define	EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN	(EVP_PKEY_ALG_CTRL + 1)
#define	EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR	(EVP_PKEY_ALG_CTRL + 2)
		

/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes
 * made after this point may be overwritten when the script is next run.
 */
void ERR_load_DH_strings(void);

/* Error codes for the DH functions. */

/* Function codes. */
#define DH_F_COMPUTE_KEY				 102
#define DH_F_DHPARAMS_PRINT_FP				 101
#define DH_F_DH_BUILTIN_GENPARAMS			 106
#define DH_F_DH_COMPUTE_KEY				 114
#define DH_F_DH_GENERATE_KEY				 115
#define DH_F_DH_GENERATE_PARAMETERS_EX			 116
#define DH_F_DH_NEW_METHOD				 105
#define DH_F_DH_PARAM_DECODE				 107
#define DH_F_DH_PRIV_DECODE				 110
#define DH_F_DH_PRIV_ENCODE				 111
#define DH_F_DH_PUB_DECODE				 108
#define DH_F_DH_PUB_ENCODE				 109
#define DH_F_DO_DH_PRINT				 100
#define DH_F_GENERATE_KEY				 103
#define DH_F_GENERATE_PARAMETERS			 104
#define DH_F_PKEY_DH_DERIVE				 112
#define DH_F_PKEY_DH_KEYGEN				 113

/* Reason codes. */
#define DH_R_BAD_GENERATOR				 101
#define DH_R_BN_DECODE_ERROR				 109
#define DH_R_BN_ERROR					 106
#define DH_R_DECODE_ERROR				 104
#define DH_R_INVALID_PUBKEY				 102
#define DH_R_KEYS_NOT_SET				 108
#define DH_R_KEY_SIZE_TOO_SMALL				 110
#define DH_R_MODULUS_TOO_LARGE				 103
#define DH_R_NON_FIPS_METHOD				 111
#define DH_R_NO_PARAMETERS_SET				 107
#define DH_R_NO_PRIVATE_VALUE				 100
#define DH_R_PARAMETER_ENCODING_ERROR			 105

#ifdef  __cplusplus
}
#endif
#endif