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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. | |
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> | |
ec577822 | 60 | #include <openssl/crypto.h> |
d02b48c6 | 61 | #include "cryptlib.h" |
ec577822 BM |
62 | #include <openssl/lhash.h> |
63 | #include <openssl/bn.h> | |
64 | #include <openssl/rsa.h> | |
5270e702 | 65 | #include <openssl/engine.h> |
d02b48c6 | 66 | |
e778802f | 67 | const char *RSA_version="RSA" OPENSSL_VERSION_PTEXT; |
d02b48c6 | 68 | |
29c1f061 | 69 | static const RSA_METHOD *default_RSA_meth=NULL; |
d02b48c6 | 70 | |
6b691a5c | 71 | RSA *RSA_new(void) |
d02b48c6 RE |
72 | { |
73 | return(RSA_new_method(NULL)); | |
74 | } | |
75 | ||
cb78486d | 76 | void RSA_set_default_method(const RSA_METHOD *meth) |
d02b48c6 | 77 | { |
cb78486d | 78 | default_RSA_meth = meth; |
d02b48c6 RE |
79 | } |
80 | ||
cb78486d GT |
81 | const RSA_METHOD *RSA_get_default_method(void) |
82 | { | |
deb4d50e GT |
83 | if (default_RSA_meth == NULL) |
84 | { | |
85 | #ifdef RSA_NULL | |
86 | default_RSA_meth=RSA_null_method(); | |
87 | #else | |
0b5806b5 | 88 | #if 0 /* was: #ifdef RSAref */ |
deb4d50e GT |
89 | default_RSA_meth=RSA_PKCS1_RSAref(); |
90 | #else | |
91 | default_RSA_meth=RSA_PKCS1_SSLeay(); | |
92 | #endif | |
93 | #endif | |
94 | } | |
95 | ||
ce8b2574 | 96 | return default_RSA_meth; |
cb78486d | 97 | } |
ce8b2574 | 98 | |
29c1f061 | 99 | const RSA_METHOD *RSA_get_method(const RSA *rsa) |
cb78486d GT |
100 | { |
101 | return rsa->meth; | |
102 | } | |
103 | ||
104 | int RSA_set_method(RSA *rsa, const RSA_METHOD *meth) | |
105 | { | |
106 | /* NB: The caller is specifically setting a method, so it's not up to us | |
107 | * to deal with which ENGINE it comes from. */ | |
108 | const RSA_METHOD *mtmp; | |
ce8b2574 DSH |
109 | mtmp = rsa->meth; |
110 | if (mtmp->finish) mtmp->finish(rsa); | |
cb78486d GT |
111 | if (rsa->engine) |
112 | { | |
113 | ENGINE_finish(rsa->engine); | |
114 | rsa->engine = NULL; | |
115 | } | |
ce8b2574 DSH |
116 | rsa->meth = meth; |
117 | if (meth->init) meth->init(rsa); | |
5270e702 | 118 | return 1; |
cb78486d | 119 | } |
ce8b2574 | 120 | |
5270e702 | 121 | RSA *RSA_new_method(ENGINE *engine) |
d02b48c6 RE |
122 | { |
123 | RSA *ret; | |
124 | ||
26a3a48d | 125 | ret=(RSA *)OPENSSL_malloc(sizeof(RSA)); |
d02b48c6 RE |
126 | if (ret == NULL) |
127 | { | |
128 | RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE); | |
d7e02997 | 129 | return NULL; |
d02b48c6 RE |
130 | } |
131 | ||
cb78486d | 132 | ret->meth = RSA_get_default_method(); |
0c372b94 DSH |
133 | if (engine) |
134 | { | |
135 | if (!ENGINE_init(engine)) | |
136 | { | |
137 | RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); | |
138 | OPENSSL_free(ret); | |
139 | return NULL; | |
140 | } | |
141 | ret->engine = engine; | |
142 | } | |
143 | else | |
cb78486d GT |
144 | ret->engine = ENGINE_get_default_RSA(); |
145 | if(ret->engine) | |
5270e702 | 146 | { |
cb78486d GT |
147 | ret->meth = ENGINE_get_RSA(ret->engine); |
148 | if(!ret->meth) | |
149 | { | |
150 | RSAerr(RSA_F_RSA_NEW_METHOD, | |
151 | ERR_R_ENGINE_LIB); | |
152 | ENGINE_finish(ret->engine); | |
153 | OPENSSL_free(ret); | |
154 | return NULL; | |
155 | } | |
0c9de428 DSH |
156 | } |
157 | ||
d02b48c6 RE |
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; | |
03f8b042 BL |
169 | ret->_method_mod_n=NULL; |
170 | ret->_method_mod_p=NULL; | |
171 | ret->_method_mod_q=NULL; | |
58964a49 | 172 | ret->blinding=NULL; |
dfeab068 | 173 | ret->bignum_data=NULL; |
cb78486d | 174 | ret->flags=ret->meth->flags; |
79aa04ef | 175 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); |
cb78486d | 176 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) |
d02b48c6 | 177 | { |
0c372b94 DSH |
178 | if (ret->engine) |
179 | ENGINE_finish(ret->engine); | |
79aa04ef | 180 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); |
26a3a48d | 181 | OPENSSL_free(ret); |
d02b48c6 RE |
182 | ret=NULL; |
183 | } | |
184 | return(ret); | |
185 | } | |
186 | ||
6b691a5c | 187 | void RSA_free(RSA *r) |
d02b48c6 RE |
188 | { |
189 | int i; | |
190 | ||
191 | if (r == NULL) return; | |
192 | ||
193 | i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA); | |
58964a49 RE |
194 | #ifdef REF_PRINT |
195 | REF_PRINT("RSA",r); | |
196 | #endif | |
d02b48c6 RE |
197 | if (i > 0) return; |
198 | #ifdef REF_CHECK | |
199 | if (i < 0) | |
200 | { | |
201 | fprintf(stderr,"RSA_free, bad reference count\n"); | |
202 | abort(); | |
203 | } | |
204 | #endif | |
205 | ||
cb78486d GT |
206 | if (r->meth->finish) |
207 | r->meth->finish(r); | |
208 | if (r->engine) | |
209 | ENGINE_finish(r->engine); | |
d02b48c6 | 210 | |
79aa04ef | 211 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); |
7abe8305 | 212 | |
d02b48c6 RE |
213 | if (r->n != NULL) BN_clear_free(r->n); |
214 | if (r->e != NULL) BN_clear_free(r->e); | |
215 | if (r->d != NULL) BN_clear_free(r->d); | |
216 | if (r->p != NULL) BN_clear_free(r->p); | |
217 | if (r->q != NULL) BN_clear_free(r->q); | |
218 | if (r->dmp1 != NULL) BN_clear_free(r->dmp1); | |
219 | if (r->dmq1 != NULL) BN_clear_free(r->dmq1); | |
220 | if (r->iqmp != NULL) BN_clear_free(r->iqmp); | |
58964a49 | 221 | if (r->blinding != NULL) BN_BLINDING_free(r->blinding); |
26a3a48d RL |
222 | if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data); |
223 | OPENSSL_free(r); | |
d02b48c6 RE |
224 | } |
225 | ||
6ac4e8bd | 226 | int RSA_up_ref(RSA *r) |
5cbc2e8b GT |
227 | { |
228 | int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); | |
229 | #ifdef REF_PRINT | |
230 | REF_PRINT("RSA",r); | |
231 | #endif | |
232 | #ifdef REF_CHECK | |
233 | if (i < 2) | |
234 | { | |
6ac4e8bd | 235 | fprintf(stderr, "RSA_up_ref, bad reference count\n"); |
5cbc2e8b GT |
236 | abort(); |
237 | } | |
238 | #endif | |
239 | return ((i > 1) ? 1 : 0); | |
240 | } | |
241 | ||
dd9d233e DSH |
242 | int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
243 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) | |
58964a49 | 244 | { |
79aa04ef GT |
245 | return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp, |
246 | new_func, dup_func, free_func); | |
58964a49 RE |
247 | } |
248 | ||
dd9d233e | 249 | int RSA_set_ex_data(RSA *r, int idx, void *arg) |
58964a49 RE |
250 | { |
251 | return(CRYPTO_set_ex_data(&r->ex_data,idx,arg)); | |
252 | } | |
253 | ||
29c1f061 | 254 | void *RSA_get_ex_data(const RSA *r, int idx) |
58964a49 RE |
255 | { |
256 | return(CRYPTO_get_ex_data(&r->ex_data,idx)); | |
257 | } | |
258 | ||
29c1f061 | 259 | int RSA_size(const RSA *r) |
d02b48c6 RE |
260 | { |
261 | return(BN_num_bytes(r->n)); | |
262 | } | |
263 | ||
29c1f061 | 264 | int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to, |
6b691a5c | 265 | RSA *rsa, int padding) |
d02b48c6 | 266 | { |
cb78486d | 267 | return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding)); |
d02b48c6 RE |
268 | } |
269 | ||
29c1f061 | 270 | int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to, |
6b691a5c | 271 | RSA *rsa, int padding) |
d02b48c6 | 272 | { |
cb78486d | 273 | return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding)); |
d02b48c6 RE |
274 | } |
275 | ||
29c1f061 | 276 | int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to, |
6b691a5c | 277 | RSA *rsa, int padding) |
d02b48c6 | 278 | { |
cb78486d | 279 | return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding)); |
d02b48c6 RE |
280 | } |
281 | ||
29c1f061 | 282 | int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to, |
6b691a5c | 283 | RSA *rsa, int padding) |
d02b48c6 | 284 | { |
cb78486d | 285 | return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding)); |
d02b48c6 RE |
286 | } |
287 | ||
29c1f061 | 288 | int RSA_flags(const RSA *r) |
58964a49 | 289 | { |
cb78486d | 290 | return((r == NULL)?0:r->meth->flags); |
58964a49 RE |
291 | } |
292 | ||
6b691a5c | 293 | void RSA_blinding_off(RSA *rsa) |
58964a49 RE |
294 | { |
295 | if (rsa->blinding != NULL) | |
296 | { | |
297 | BN_BLINDING_free(rsa->blinding); | |
298 | rsa->blinding=NULL; | |
299 | } | |
300 | rsa->flags&= ~RSA_FLAG_BLINDING; | |
301 | } | |
302 | ||
6b691a5c | 303 | int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx) |
58964a49 RE |
304 | { |
305 | BIGNUM *A,*Ai; | |
306 | BN_CTX *ctx; | |
307 | int ret=0; | |
308 | ||
309 | if (p_ctx == NULL) | |
310 | { | |
311 | if ((ctx=BN_CTX_new()) == NULL) goto err; | |
312 | } | |
313 | else | |
314 | ctx=p_ctx; | |
315 | ||
316 | if (rsa->blinding != NULL) | |
317 | BN_BLINDING_free(rsa->blinding); | |
318 | ||
9b141126 UM |
319 | BN_CTX_start(ctx); |
320 | A = BN_CTX_get(ctx); | |
12c2fe8d | 321 | if (!BN_rand_range(A,rsa->n)) goto err; |
dfeab068 | 322 | if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err; |
58964a49 | 323 | |
cb78486d | 324 | if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n)) |
03f8b042 | 325 | goto err; |
58964a49 | 326 | rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n); |
58964a49 RE |
327 | rsa->flags|=RSA_FLAG_BLINDING; |
328 | BN_free(Ai); | |
329 | ret=1; | |
330 | err: | |
9b141126 | 331 | BN_CTX_end(ctx); |
58964a49 RE |
332 | if (ctx != p_ctx) BN_CTX_free(ctx); |
333 | return(ret); | |
334 | } | |
335 | ||
6b691a5c | 336 | int RSA_memory_lock(RSA *r) |
dfeab068 RE |
337 | { |
338 | int i,j,k,off; | |
339 | char *p; | |
340 | BIGNUM *bn,**t[6],*b; | |
341 | BN_ULONG *ul; | |
342 | ||
343 | if (r->d == NULL) return(1); | |
344 | t[0]= &r->d; | |
345 | t[1]= &r->p; | |
346 | t[2]= &r->q; | |
347 | t[3]= &r->dmp1; | |
348 | t[4]= &r->dmq1; | |
349 | t[5]= &r->iqmp; | |
350 | k=sizeof(BIGNUM)*6; | |
351 | off=k/sizeof(BN_ULONG)+1; | |
352 | j=1; | |
353 | for (i=0; i<6; i++) | |
354 | j+= (*t[i])->top; | |
26a3a48d | 355 | if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL) |
dfeab068 RE |
356 | { |
357 | RSAerr(RSA_F_MEMORY_LOCK,ERR_R_MALLOC_FAILURE); | |
358 | return(0); | |
359 | } | |
360 | bn=(BIGNUM *)p; | |
361 | ul=(BN_ULONG *)&(p[off]); | |
362 | for (i=0; i<6; i++) | |
363 | { | |
364 | b= *(t[i]); | |
365 | *(t[i])= &(bn[i]); | |
366 | memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM)); | |
367 | bn[i].flags=BN_FLG_STATIC_DATA; | |
368 | bn[i].d=ul; | |
369 | memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top); | |
370 | ul+=b->top; | |
371 | BN_clear_free(b); | |
372 | } | |
373 | ||
374 | /* I should fix this so it can still be done */ | |
375 | r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC); | |
376 | ||
377 | r->bignum_data=p; | |
378 | return(1); | |
379 | } |