1 /* crypto/dh/dh.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 #ifndef HEADER_DH_H |
|
60 #define HEADER_DH_H |
|
61 |
|
62 #ifdef OPENSSL_NO_DH |
|
63 #error DH is disabled. |
|
64 #endif |
|
65 |
|
66 #ifndef OPENSSL_NO_BIO |
|
67 #include <openssl/bio.h> |
|
68 #endif |
|
69 #include <openssl/bn.h> |
|
70 #include <openssl/crypto.h> |
|
71 #include <openssl/ossl_typ.h> |
|
72 |
|
73 #define DH_FLAG_CACHE_MONT_P 0x01 |
|
74 |
|
75 #ifdef __cplusplus |
|
76 extern "C" { |
|
77 #endif |
|
78 |
|
79 typedef struct dh_st DH; |
|
80 |
|
81 typedef struct dh_method { |
|
82 const char *name; |
|
83 /* Methods here */ |
|
84 int (*generate_key)(DH *dh); |
|
85 int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh); |
|
86 int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a, |
|
87 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, |
|
88 BN_MONT_CTX *m_ctx); /* Can be null */ |
|
89 |
|
90 int (*init)(DH *dh); |
|
91 int (*finish)(DH *dh); |
|
92 int flags; |
|
93 char *app_data; |
|
94 } DH_METHOD; |
|
95 |
|
96 struct dh_st |
|
97 { |
|
98 /* This first argument is used to pick up errors when |
|
99 * a DH is passed instead of a EVP_PKEY */ |
|
100 int pad; |
|
101 int version; |
|
102 BIGNUM *p; |
|
103 BIGNUM *g; |
|
104 long length; /* optional */ |
|
105 BIGNUM *pub_key; /* g^x */ |
|
106 BIGNUM *priv_key; /* x */ |
|
107 |
|
108 int flags; |
|
109 char *method_mont_p; |
|
110 /* Place holders if we want to do X9.42 DH */ |
|
111 BIGNUM *q; |
|
112 BIGNUM *j; |
|
113 unsigned char *seed; |
|
114 int seedlen; |
|
115 BIGNUM *counter; |
|
116 |
|
117 int references; |
|
118 CRYPTO_EX_DATA ex_data; |
|
119 const DH_METHOD *meth; |
|
120 ENGINE *engine; |
|
121 }; |
|
122 |
|
123 #define DH_GENERATOR_2 2 |
|
124 /* #define DH_GENERATOR_3 3 */ |
|
125 #define DH_GENERATOR_5 5 |
|
126 |
|
127 /* DH_check error codes */ |
|
128 #define DH_CHECK_P_NOT_PRIME 0x01 |
|
129 #define DH_CHECK_P_NOT_SAFE_PRIME 0x02 |
|
130 #define DH_UNABLE_TO_CHECK_GENERATOR 0x04 |
|
131 #define DH_NOT_SUITABLE_GENERATOR 0x08 |
|
132 |
|
133 /* primes p where (p-1)/2 is prime too are called "safe"; we define |
|
134 this for backward compatibility: */ |
|
135 #define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME |
|
136 |
|
137 #define DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \ |
|
138 (char *(*)())d2i_DHparams,(char *)(x)) |
|
139 #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \ |
|
140 (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x)) |
|
141 #define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \ |
|
142 (unsigned char *)(x)) |
|
143 #define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \ |
|
144 (char *(*)())d2i_DHparams,(bp),(unsigned char **)(x)) |
|
145 #ifdef __cplusplus |
|
146 #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \ |
|
147 (unsigned char *)(x)) |
|
148 #else |
|
149 #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \ |
|
150 (unsigned char *)(x)) |
|
151 #endif |
|
152 |
|
153 const DH_METHOD *DH_OpenSSL(void); |
|
154 |
|
155 void DH_set_default_method(const DH_METHOD *meth); |
|
156 const DH_METHOD *DH_get_default_method(void); |
|
157 int DH_set_method(DH *dh, const DH_METHOD *meth); |
|
158 DH *DH_new_method(ENGINE *engine); |
|
159 |
|
160 DH * DH_new(void); |
|
161 void DH_free(DH *dh); |
|
162 int DH_up_ref(DH *dh); |
|
163 int DH_size(const DH *dh); |
|
164 int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
|
165 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); |
|
166 int DH_set_ex_data(DH *d, int idx, void *arg); |
|
167 void *DH_get_ex_data(DH *d, int idx); |
|
168 DH * DH_generate_parameters(int prime_len,int generator, |
|
169 void (*callback)(int,int,void *),void *cb_arg); |
|
170 int DH_check(const DH *dh,int *codes); |
|
171 int DH_generate_key(DH *dh); |
|
172 int DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh); |
|
173 DH * d2i_DHparams(DH **a,const unsigned char **pp, long length); |
|
174 int i2d_DHparams(const DH *a,unsigned char **pp); |
|
175 #ifndef OPENSSL_NO_FP_API |
|
176 int DHparams_print_fp(FILE *fp, const DH *x); |
|
177 #endif |
|
178 #ifndef OPENSSL_NO_BIO |
|
179 int DHparams_print(BIO *bp, const DH *x); |
|
180 #else |
|
181 int DHparams_print(char *bp, const DH *x); |
|
182 #endif |
|
183 |
|
184 /* BEGIN ERROR CODES */ |
|
185 /* The following lines are auto generated by the script mkerr.pl. Any changes |
|
186 * made after this point may be overwritten when the script is next run. |
|
187 */ |
|
188 void ERR_load_DH_strings(void); |
|
189 |
|
190 /* Error codes for the DH functions. */ |
|
191 |
|
192 /* Function codes. */ |
|
193 #define DH_F_DHPARAMS_PRINT 100 |
|
194 #define DH_F_DHPARAMS_PRINT_FP 101 |
|
195 #define DH_F_DH_COMPUTE_KEY 102 |
|
196 #define DH_F_DH_GENERATE_KEY 103 |
|
197 #define DH_F_DH_GENERATE_PARAMETERS 104 |
|
198 #define DH_F_DH_NEW_METHOD 105 |
|
199 |
|
200 /* Reason codes. */ |
|
201 #define DH_R_BAD_GENERATOR 101 |
|
202 #define DH_R_NO_PRIVATE_VALUE 100 |
|
203 |
|
204 #ifdef __cplusplus |
|
205 } |
|
206 #endif |
|
207 #endif |
|
208 |
|