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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> |
d02b48c6 | 61 | #include "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 | const char RSA_version[] = "RSA" OPENSSL_VERSION_PTEXT; |
d02b48c6 | 71 | |
0f113f3e | 72 | static const RSA_METHOD *default_RSA_meth = NULL; |
d02b48c6 | 73 | |
6b691a5c | 74 | RSA *RSA_new(void) |
0f113f3e MC |
75 | { |
76 | RSA *r = RSA_new_method(NULL); | |
c554155b | 77 | |
0f113f3e MC |
78 | return r; |
79 | } | |
d02b48c6 | 80 | |
cb78486d | 81 | void RSA_set_default_method(const RSA_METHOD *meth) |
0f113f3e MC |
82 | { |
83 | default_RSA_meth = meth; | |
84 | } | |
d02b48c6 | 85 | |
cb78486d | 86 | const RSA_METHOD *RSA_get_default_method(void) |
0f113f3e MC |
87 | { |
88 | if (default_RSA_meth == NULL) { | |
deb4d50e | 89 | #ifdef RSA_NULL |
0f113f3e | 90 | default_RSA_meth = RSA_null_method(); |
deb4d50e | 91 | #else |
0f113f3e | 92 | default_RSA_meth = RSA_PKCS1_SSLeay(); |
deb4d50e | 93 | #endif |
0f113f3e | 94 | } |
deb4d50e | 95 | |
0f113f3e MC |
96 | return default_RSA_meth; |
97 | } | |
ce8b2574 | 98 | |
29c1f061 | 99 | const RSA_METHOD *RSA_get_method(const RSA *rsa) |
0f113f3e MC |
100 | { |
101 | return rsa->meth; | |
102 | } | |
cb78486d GT |
103 | |
104 | int RSA_set_method(RSA *rsa, const RSA_METHOD *meth) | |
0f113f3e MC |
105 | { |
106 | /* | |
107 | * NB: The caller is specifically setting a method, so it's not up to us | |
108 | * to deal with which ENGINE it comes from. | |
109 | */ | |
110 | const RSA_METHOD *mtmp; | |
111 | mtmp = rsa->meth; | |
112 | if (mtmp->finish) | |
113 | mtmp->finish(rsa); | |
0b13e9f0 | 114 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
115 | if (rsa->engine) { |
116 | ENGINE_finish(rsa->engine); | |
117 | rsa->engine = NULL; | |
118 | } | |
0b13e9f0 | 119 | #endif |
0f113f3e MC |
120 | rsa->meth = meth; |
121 | if (meth->init) | |
122 | meth->init(rsa); | |
123 | return 1; | |
124 | } | |
ce8b2574 | 125 | |
5270e702 | 126 | RSA *RSA_new_method(ENGINE *engine) |
0f113f3e MC |
127 | { |
128 | RSA *ret; | |
d02b48c6 | 129 | |
b4faea50 | 130 | ret = OPENSSL_malloc(sizeof(*ret)); |
0f113f3e MC |
131 | if (ret == NULL) { |
132 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); | |
133 | return NULL; | |
134 | } | |
d02b48c6 | 135 | |
0f113f3e | 136 | ret->meth = RSA_get_default_method(); |
0b13e9f0 | 137 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
138 | if (engine) { |
139 | if (!ENGINE_init(engine)) { | |
140 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); | |
141 | OPENSSL_free(ret); | |
142 | return NULL; | |
143 | } | |
144 | ret->engine = engine; | |
145 | } else | |
146 | ret->engine = ENGINE_get_default_RSA(); | |
147 | if (ret->engine) { | |
148 | ret->meth = ENGINE_get_RSA(ret->engine); | |
149 | if (!ret->meth) { | |
150 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); | |
151 | ENGINE_finish(ret->engine); | |
152 | OPENSSL_free(ret); | |
153 | return NULL; | |
154 | } | |
155 | } | |
0b13e9f0 | 156 | #endif |
0c9de428 | 157 | |
0f113f3e MC |
158 | ret->pad = 0; |
159 | ret->version = 0; | |
160 | ret->n = NULL; | |
161 | ret->e = NULL; | |
162 | ret->d = NULL; | |
163 | ret->p = NULL; | |
164 | ret->q = NULL; | |
165 | ret->dmp1 = NULL; | |
166 | ret->dmq1 = NULL; | |
167 | ret->iqmp = NULL; | |
168 | ret->references = 1; | |
169 | ret->_method_mod_n = NULL; | |
170 | ret->_method_mod_p = NULL; | |
171 | ret->_method_mod_q = NULL; | |
172 | ret->blinding = NULL; | |
173 | ret->mt_blinding = NULL; | |
174 | ret->bignum_data = NULL; | |
175 | ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; | |
176 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) { | |
fdb2c6e4 | 177 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
178 | if (ret->engine) |
179 | ENGINE_finish(ret->engine); | |
fdb2c6e4 | 180 | #endif |
0f113f3e MC |
181 | OPENSSL_free(ret); |
182 | return (NULL); | |
183 | } | |
fdb2c6e4 | 184 | |
0f113f3e | 185 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { |
0b13e9f0 | 186 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
187 | if (ret->engine) |
188 | ENGINE_finish(ret->engine); | |
0b13e9f0 | 189 | #endif |
0f113f3e MC |
190 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); |
191 | OPENSSL_free(ret); | |
192 | ret = NULL; | |
193 | } | |
194 | return (ret); | |
195 | } | |
d02b48c6 | 196 | |
6b691a5c | 197 | void RSA_free(RSA *r) |
0f113f3e MC |
198 | { |
199 | int i; | |
d02b48c6 | 200 | |
0f113f3e MC |
201 | if (r == NULL) |
202 | return; | |
d02b48c6 | 203 | |
0f113f3e | 204 | i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA); |
58964a49 | 205 | #ifdef REF_PRINT |
0f113f3e | 206 | REF_PRINT("RSA", r); |
58964a49 | 207 | #endif |
0f113f3e MC |
208 | if (i > 0) |
209 | return; | |
d02b48c6 | 210 | #ifdef REF_CHECK |
0f113f3e MC |
211 | if (i < 0) { |
212 | fprintf(stderr, "RSA_free, bad reference count\n"); | |
213 | abort(); | |
214 | } | |
d02b48c6 RE |
215 | #endif |
216 | ||
0f113f3e MC |
217 | if (r->meth->finish) |
218 | r->meth->finish(r); | |
0b13e9f0 | 219 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
220 | if (r->engine) |
221 | ENGINE_finish(r->engine); | |
0b13e9f0 | 222 | #endif |
d02b48c6 | 223 | |
0f113f3e | 224 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); |
7abe8305 | 225 | |
23a1d5e9 RS |
226 | BN_clear_free(r->n); |
227 | BN_clear_free(r->e); | |
228 | BN_clear_free(r->d); | |
229 | BN_clear_free(r->p); | |
230 | BN_clear_free(r->q); | |
231 | BN_clear_free(r->dmp1); | |
232 | BN_clear_free(r->dmq1); | |
233 | BN_clear_free(r->iqmp); | |
234 | BN_BLINDING_free(r->blinding); | |
235 | BN_BLINDING_free(r->mt_blinding); | |
4b45c6e5 | 236 | OPENSSL_free_locked(r->bignum_data); |
0f113f3e MC |
237 | OPENSSL_free(r); |
238 | } | |
d02b48c6 | 239 | |
6ac4e8bd | 240 | int RSA_up_ref(RSA *r) |
0f113f3e MC |
241 | { |
242 | int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); | |
5cbc2e8b | 243 | #ifdef REF_PRINT |
0f113f3e | 244 | REF_PRINT("RSA", r); |
5cbc2e8b GT |
245 | #endif |
246 | #ifdef REF_CHECK | |
0f113f3e MC |
247 | if (i < 2) { |
248 | fprintf(stderr, "RSA_up_ref, bad reference count\n"); | |
249 | abort(); | |
250 | } | |
5cbc2e8b | 251 | #endif |
0f113f3e MC |
252 | return ((i > 1) ? 1 : 0); |
253 | } | |
5cbc2e8b | 254 | |
dd9d233e | 255 | int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
0f113f3e MC |
256 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) |
257 | { | |
258 | return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp, | |
259 | new_func, dup_func, free_func); | |
260 | } | |
58964a49 | 261 | |
dd9d233e | 262 | int RSA_set_ex_data(RSA *r, int idx, void *arg) |
0f113f3e MC |
263 | { |
264 | return (CRYPTO_set_ex_data(&r->ex_data, idx, arg)); | |
265 | } | |
58964a49 | 266 | |
29c1f061 | 267 | void *RSA_get_ex_data(const RSA *r, int idx) |
0f113f3e MC |
268 | { |
269 | return (CRYPTO_get_ex_data(&r->ex_data, idx)); | |
270 | } | |
58964a49 | 271 | |
6b691a5c | 272 | int RSA_memory_lock(RSA *r) |
0f113f3e MC |
273 | { |
274 | int i, j, k, off; | |
275 | char *p; | |
276 | BIGNUM *bn, **t[6], *b; | |
277 | BN_ULONG *ul; | |
278 | ||
279 | if (r->d == NULL) | |
280 | return (1); | |
281 | t[0] = &r->d; | |
282 | t[1] = &r->p; | |
283 | t[2] = &r->q; | |
284 | t[3] = &r->dmp1; | |
285 | t[4] = &r->dmq1; | |
286 | t[5] = &r->iqmp; | |
287 | k = bn_sizeof_BIGNUM() * 6; | |
288 | off = k / sizeof(BN_ULONG) + 1; | |
289 | j = 1; | |
290 | for (i = 0; i < 6; i++) | |
291 | j += bn_get_top(*t[i]); | |
292 | if ((p = OPENSSL_malloc_locked((off + j) * sizeof(BN_ULONG))) == NULL) { | |
293 | RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE); | |
294 | return (0); | |
295 | } | |
296 | memset(p, 0, (off + j) * sizeof(BN_ULONG)); | |
297 | bn = (BIGNUM *)p; | |
298 | ul = (BN_ULONG *)&(p[off]); | |
299 | for (i = 0; i < 6; i++) { | |
300 | b = *(t[i]); | |
301 | *(t[i]) = bn_array_el(bn, i); | |
302 | memcpy((char *)bn_array_el(bn, i), (char *)b, bn_sizeof_BIGNUM()); | |
303 | memcpy((char *)ul, bn_get_words(b), sizeof(BN_ULONG) * bn_get_top(b)); | |
304 | bn_set_static_words(bn_array_el(bn, i), ul, bn_get_top(b)); | |
305 | ul += bn_get_top(b); | |
306 | BN_clear_free(b); | |
307 | } | |
dfeab068 | 308 | |
0f113f3e MC |
309 | /* I should fix this so it can still be done */ |
310 | r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC); | |
dfeab068 | 311 | |
0f113f3e MC |
312 | r->bignum_data = p; |
313 | return (1); | |
314 | } | |
2514fa79 DSH |
315 | |
316 | int RSA_security_bits(const RSA *rsa) | |
0f113f3e MC |
317 | { |
318 | return BN_security_bits(BN_num_bits(rsa->n), -1); | |
319 | } |