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diff --git a/src/lib/libcrypto/rsa/rsa_x931g.c b/src/lib/libcrypto/rsa/rsa_x931g.c
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1/* crypto/rsa/rsa_gen.c */
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#include <stdio.h>
60#include <string.h>
61#include <time.h>
62#include <openssl/err.h>
63#include <openssl/bn.h>
64#include <openssl/rsa.h>
65
66#ifndef OPENSSL_FIPS
67
68/* X9.31 RSA key derivation and generation */
69
70int RSA_X931_derive_ex(RSA *rsa, BIGNUM *p1, BIGNUM *p2, BIGNUM *q1, BIGNUM *q2,
71 const BIGNUM *Xp1, const BIGNUM *Xp2, const BIGNUM *Xp,
72 const BIGNUM *Xq1, const BIGNUM *Xq2, const BIGNUM *Xq,
73 const BIGNUM *e, BN_GENCB *cb)
74 {
75 BIGNUM *r0=NULL,*r1=NULL,*r2=NULL,*r3=NULL;
76 BN_CTX *ctx=NULL,*ctx2=NULL;
77
78 if (!rsa)
79 goto err;
80
81 ctx = BN_CTX_new();
82 if (!ctx)
83 goto err;
84 BN_CTX_start(ctx);
85
86 r0 = BN_CTX_get(ctx);
87 r1 = BN_CTX_get(ctx);
88 r2 = BN_CTX_get(ctx);
89 r3 = BN_CTX_get(ctx);
90
91 if (r3 == NULL)
92 goto err;
93 if (!rsa->e)
94 {
95 rsa->e = BN_dup(e);
96 if (!rsa->e)
97 goto err;
98 }
99 else
100 e = rsa->e;
101
102 /* If not all parameters present only calculate what we can.
103 * This allows test programs to output selective parameters.
104 */
105
106 if (Xp && !rsa->p)
107 {
108 rsa->p = BN_new();
109 if (!rsa->p)
110 goto err;
111
112 if (!BN_X931_derive_prime_ex(rsa->p, p1, p2,
113 Xp, Xp1, Xp2, e, ctx, cb))
114 goto err;
115 }
116
117 if (Xq && !rsa->q)
118 {
119 rsa->q = BN_new();
120 if (!rsa->q)
121 goto err;
122 if (!BN_X931_derive_prime_ex(rsa->q, q1, q2,
123 Xq, Xq1, Xq2, e, ctx, cb))
124 goto err;
125 }
126
127 if (!rsa->p || !rsa->q)
128 {
129 BN_CTX_end(ctx);
130 BN_CTX_free(ctx);
131 return 2;
132 }
133
134 /* Since both primes are set we can now calculate all remaining
135 * components.
136 */
137
138 /* calculate n */
139 rsa->n=BN_new();
140 if (rsa->n == NULL)
141 goto err;
142 if (!BN_mul(rsa->n,rsa->p,rsa->q,ctx))
143 goto err;
144
145 /* calculate d */
146 if (!BN_sub(r1,rsa->p,BN_value_one()))
147 goto err; /* p-1 */
148 if (!BN_sub(r2,rsa->q,BN_value_one()))
149 goto err; /* q-1 */
150 if (!BN_mul(r0,r1,r2,ctx))
151 goto err; /* (p-1)(q-1) */
152
153 if (!BN_gcd(r3, r1, r2, ctx))
154 goto err;
155
156 if (!BN_div(r0, NULL, r0, r3, ctx))
157 goto err; /* LCM((p-1)(q-1)) */
158
159 ctx2 = BN_CTX_new();
160 if (!ctx2)
161 goto err;
162
163 rsa->d=BN_mod_inverse(NULL,rsa->e,r0,ctx2); /* d */
164 if (rsa->d == NULL)
165 goto err;
166
167 /* calculate d mod (p-1) */
168 rsa->dmp1=BN_new();
169 if (rsa->dmp1 == NULL)
170 goto err;
171 if (!BN_mod(rsa->dmp1,rsa->d,r1,ctx))
172 goto err;
173
174 /* calculate d mod (q-1) */
175 rsa->dmq1=BN_new();
176 if (rsa->dmq1 == NULL)
177 goto err;
178 if (!BN_mod(rsa->dmq1,rsa->d,r2,ctx))
179 goto err;
180
181 /* calculate inverse of q mod p */
182 rsa->iqmp=BN_mod_inverse(NULL,rsa->q,rsa->p,ctx2);
183
184 err:
185 if (ctx)
186 {
187 BN_CTX_end(ctx);
188 BN_CTX_free(ctx);
189 }
190 if (ctx2)
191 BN_CTX_free(ctx2);
192 /* If this is set all calls successful */
193 if (rsa && rsa->iqmp != NULL)
194 return 1;
195
196 return 0;
197
198 }
199
200int RSA_X931_generate_key_ex(RSA *rsa, int bits, const BIGNUM *e, BN_GENCB *cb)
201 {
202 int ok = 0;
203 BIGNUM *Xp = NULL, *Xq = NULL;
204 BN_CTX *ctx = NULL;
205
206 ctx = BN_CTX_new();
207 if (!ctx)
208 goto error;
209
210 BN_CTX_start(ctx);
211 Xp = BN_CTX_get(ctx);
212 Xq = BN_CTX_get(ctx);
213 if (!BN_X931_generate_Xpq(Xp, Xq, bits, ctx))
214 goto error;
215
216 rsa->p = BN_new();
217 rsa->q = BN_new();
218 if (!rsa->p || !rsa->q)
219 goto error;
220
221 /* Generate two primes from Xp, Xq */
222
223 if (!BN_X931_generate_prime_ex(rsa->p, NULL, NULL, NULL, NULL, Xp,
224 e, ctx, cb))
225 goto error;
226
227 if (!BN_X931_generate_prime_ex(rsa->q, NULL, NULL, NULL, NULL, Xq,
228 e, ctx, cb))
229 goto error;
230
231 /* Since rsa->p and rsa->q are valid this call will just derive
232 * remaining RSA components.
233 */
234
235 if (!RSA_X931_derive_ex(rsa, NULL, NULL, NULL, NULL,
236 NULL, NULL, NULL, NULL, NULL, NULL, e, cb))
237 goto error;
238
239 ok = 1;
240
241 error:
242 if (ctx)
243 {
244 BN_CTX_end(ctx);
245 BN_CTX_free(ctx);
246 }
247
248 if (ok)
249 return 1;
250
251 return 0;
252
253 }
254
255#endif
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