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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 | |
70 int 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 | |
200 int 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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