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d02b48c6 | 1 | /* crypto/rsa/rsa_lib.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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> | |
ec577822 | 60 | #include <openssl/crypto.h> |
b39fc560 | 61 | #include "internal/cryptlib.h" |
ec577822 | 62 | #include <openssl/lhash.h> |
18125f7f | 63 | #include "internal/bn_int.h" |
ec577822 | 64 | #include <openssl/rsa.h> |
721688c2 | 65 | #include <openssl/rand.h> |
0b13e9f0 | 66 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 67 | # include <openssl/engine.h> |
0b13e9f0 | 68 | #endif |
d02b48c6 | 69 | |
0f113f3e | 70 | static const RSA_METHOD *default_RSA_meth = NULL; |
d02b48c6 | 71 | |
6b691a5c | 72 | RSA *RSA_new(void) |
0f113f3e MC |
73 | { |
74 | RSA *r = RSA_new_method(NULL); | |
c554155b | 75 | |
0f113f3e MC |
76 | return r; |
77 | } | |
d02b48c6 | 78 | |
cb78486d | 79 | void RSA_set_default_method(const RSA_METHOD *meth) |
0f113f3e MC |
80 | { |
81 | default_RSA_meth = meth; | |
82 | } | |
d02b48c6 | 83 | |
cb78486d | 84 | const RSA_METHOD *RSA_get_default_method(void) |
0f113f3e MC |
85 | { |
86 | if (default_RSA_meth == NULL) { | |
deb4d50e | 87 | #ifdef RSA_NULL |
0f113f3e | 88 | default_RSA_meth = RSA_null_method(); |
deb4d50e | 89 | #else |
b0700d2c | 90 | default_RSA_meth = RSA_PKCS1_OpenSSL(); |
deb4d50e | 91 | #endif |
0f113f3e | 92 | } |
deb4d50e | 93 | |
0f113f3e MC |
94 | return default_RSA_meth; |
95 | } | |
ce8b2574 | 96 | |
29c1f061 | 97 | const RSA_METHOD *RSA_get_method(const RSA *rsa) |
0f113f3e MC |
98 | { |
99 | return rsa->meth; | |
100 | } | |
cb78486d GT |
101 | |
102 | int RSA_set_method(RSA *rsa, const RSA_METHOD *meth) | |
0f113f3e MC |
103 | { |
104 | /* | |
105 | * NB: The caller is specifically setting a method, so it's not up to us | |
106 | * to deal with which ENGINE it comes from. | |
107 | */ | |
108 | const RSA_METHOD *mtmp; | |
109 | mtmp = rsa->meth; | |
110 | if (mtmp->finish) | |
111 | mtmp->finish(rsa); | |
0b13e9f0 | 112 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
113 | if (rsa->engine) { |
114 | ENGINE_finish(rsa->engine); | |
115 | rsa->engine = NULL; | |
116 | } | |
0b13e9f0 | 117 | #endif |
0f113f3e MC |
118 | rsa->meth = meth; |
119 | if (meth->init) | |
120 | meth->init(rsa); | |
121 | return 1; | |
122 | } | |
ce8b2574 | 123 | |
5270e702 | 124 | RSA *RSA_new_method(ENGINE *engine) |
0f113f3e MC |
125 | { |
126 | RSA *ret; | |
d02b48c6 | 127 | |
64b25758 | 128 | ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e MC |
129 | if (ret == NULL) { |
130 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); | |
131 | return NULL; | |
132 | } | |
d02b48c6 | 133 | |
0f113f3e | 134 | ret->meth = RSA_get_default_method(); |
0b13e9f0 | 135 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
136 | if (engine) { |
137 | if (!ENGINE_init(engine)) { | |
138 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); | |
139 | OPENSSL_free(ret); | |
140 | return NULL; | |
141 | } | |
142 | ret->engine = engine; | |
143 | } else | |
144 | ret->engine = ENGINE_get_default_RSA(); | |
145 | if (ret->engine) { | |
146 | ret->meth = ENGINE_get_RSA(ret->engine); | |
147 | if (!ret->meth) { | |
148 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); | |
149 | ENGINE_finish(ret->engine); | |
150 | OPENSSL_free(ret); | |
151 | return NULL; | |
152 | } | |
153 | } | |
0b13e9f0 | 154 | #endif |
0c9de428 | 155 | |
0f113f3e | 156 | ret->references = 1; |
0f113f3e MC |
157 | ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; |
158 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) { | |
fdb2c6e4 | 159 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
160 | if (ret->engine) |
161 | ENGINE_finish(ret->engine); | |
fdb2c6e4 | 162 | #endif |
0f113f3e MC |
163 | OPENSSL_free(ret); |
164 | return (NULL); | |
165 | } | |
fdb2c6e4 | 166 | |
0f113f3e | 167 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { |
0b13e9f0 | 168 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
169 | if (ret->engine) |
170 | ENGINE_finish(ret->engine); | |
0b13e9f0 | 171 | #endif |
0f113f3e MC |
172 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); |
173 | OPENSSL_free(ret); | |
174 | ret = NULL; | |
175 | } | |
176 | return (ret); | |
177 | } | |
d02b48c6 | 178 | |
6b691a5c | 179 | void RSA_free(RSA *r) |
0f113f3e MC |
180 | { |
181 | int i; | |
d02b48c6 | 182 | |
0f113f3e MC |
183 | if (r == NULL) |
184 | return; | |
d02b48c6 | 185 | |
0f113f3e | 186 | i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA); |
58964a49 | 187 | #ifdef REF_PRINT |
0f113f3e | 188 | REF_PRINT("RSA", r); |
58964a49 | 189 | #endif |
0f113f3e MC |
190 | if (i > 0) |
191 | return; | |
d02b48c6 | 192 | #ifdef REF_CHECK |
0f113f3e MC |
193 | if (i < 0) { |
194 | fprintf(stderr, "RSA_free, bad reference count\n"); | |
195 | abort(); | |
196 | } | |
d02b48c6 RE |
197 | #endif |
198 | ||
0f113f3e MC |
199 | if (r->meth->finish) |
200 | r->meth->finish(r); | |
0b13e9f0 | 201 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
202 | if (r->engine) |
203 | ENGINE_finish(r->engine); | |
0b13e9f0 | 204 | #endif |
d02b48c6 | 205 | |
0f113f3e | 206 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); |
7abe8305 | 207 | |
23a1d5e9 RS |
208 | BN_clear_free(r->n); |
209 | BN_clear_free(r->e); | |
210 | BN_clear_free(r->d); | |
211 | BN_clear_free(r->p); | |
212 | BN_clear_free(r->q); | |
213 | BN_clear_free(r->dmp1); | |
214 | BN_clear_free(r->dmq1); | |
215 | BN_clear_free(r->iqmp); | |
216 | BN_BLINDING_free(r->blinding); | |
217 | BN_BLINDING_free(r->mt_blinding); | |
4c42ebd2 | 218 | OPENSSL_free(r->bignum_data); |
0f113f3e MC |
219 | OPENSSL_free(r); |
220 | } | |
d02b48c6 | 221 | |
6ac4e8bd | 222 | int RSA_up_ref(RSA *r) |
0f113f3e MC |
223 | { |
224 | int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); | |
5cbc2e8b | 225 | #ifdef REF_PRINT |
0f113f3e | 226 | REF_PRINT("RSA", r); |
5cbc2e8b GT |
227 | #endif |
228 | #ifdef REF_CHECK | |
0f113f3e MC |
229 | if (i < 2) { |
230 | fprintf(stderr, "RSA_up_ref, bad reference count\n"); | |
231 | abort(); | |
232 | } | |
5cbc2e8b | 233 | #endif |
0f113f3e MC |
234 | return ((i > 1) ? 1 : 0); |
235 | } | |
5cbc2e8b | 236 | |
dd9d233e | 237 | int RSA_set_ex_data(RSA *r, int idx, void *arg) |
0f113f3e MC |
238 | { |
239 | return (CRYPTO_set_ex_data(&r->ex_data, idx, arg)); | |
240 | } | |
58964a49 | 241 | |
29c1f061 | 242 | void *RSA_get_ex_data(const RSA *r, int idx) |
0f113f3e MC |
243 | { |
244 | return (CRYPTO_get_ex_data(&r->ex_data, idx)); | |
245 | } | |
58964a49 | 246 | |
6b691a5c | 247 | int RSA_memory_lock(RSA *r) |
0f113f3e MC |
248 | { |
249 | int i, j, k, off; | |
250 | char *p; | |
251 | BIGNUM *bn, **t[6], *b; | |
252 | BN_ULONG *ul; | |
253 | ||
254 | if (r->d == NULL) | |
255 | return (1); | |
256 | t[0] = &r->d; | |
257 | t[1] = &r->p; | |
258 | t[2] = &r->q; | |
259 | t[3] = &r->dmp1; | |
260 | t[4] = &r->dmq1; | |
261 | t[5] = &r->iqmp; | |
262 | k = bn_sizeof_BIGNUM() * 6; | |
263 | off = k / sizeof(BN_ULONG) + 1; | |
264 | j = 1; | |
265 | for (i = 0; i < 6; i++) | |
266 | j += bn_get_top(*t[i]); | |
b51bce94 | 267 | if ((p = OPENSSL_malloc((off + j) * sizeof(*p))) == NULL) { |
0f113f3e MC |
268 | RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE); |
269 | return (0); | |
270 | } | |
16f8d4eb | 271 | memset(p, 0, sizeof(*p) * (off + j)); |
0f113f3e MC |
272 | bn = (BIGNUM *)p; |
273 | ul = (BN_ULONG *)&(p[off]); | |
274 | for (i = 0; i < 6; i++) { | |
275 | b = *(t[i]); | |
276 | *(t[i]) = bn_array_el(bn, i); | |
16f8d4eb RS |
277 | memcpy(bn_array_el(bn, i), b, bn_sizeof_BIGNUM()); |
278 | memcpy(ul, bn_get_words(b), sizeof(*ul) * bn_get_top(b)); | |
0f113f3e MC |
279 | bn_set_static_words(bn_array_el(bn, i), ul, bn_get_top(b)); |
280 | ul += bn_get_top(b); | |
281 | BN_clear_free(b); | |
282 | } | |
dfeab068 | 283 | |
0f113f3e MC |
284 | /* I should fix this so it can still be done */ |
285 | r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC); | |
dfeab068 | 286 | |
0f113f3e MC |
287 | r->bignum_data = p; |
288 | return (1); | |
289 | } | |
2514fa79 DSH |
290 | |
291 | int RSA_security_bits(const RSA *rsa) | |
0f113f3e MC |
292 | { |
293 | return BN_security_bits(BN_num_bits(rsa->n), -1); | |
294 | } |