1 /* crypto/rsa/rsa_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
60 #include <openssl/crypto.h>
62 #include <openssl/lhash.h>
63 #include <openssl/bn.h>
64 #include <openssl/rsa.h>
65 #include <openssl/engine.h>
67 const char *RSA_version="RSA" OPENSSL_VERSION_PTEXT;
69 static const RSA_METHOD *default_RSA_meth=NULL;
73 return(RSA_new_method(NULL));
76 void RSA_set_default_openssl_method(const RSA_METHOD *meth)
79 /* We'll need to notify the "openssl" ENGINE of this
80 * change too. We won't bother locking things down at
81 * our end as there was never any locking in these
83 if(default_RSA_meth != meth)
85 default_RSA_meth = meth;
86 e = ENGINE_by_id("openssl");
89 ENGINE_set_RSA(e, meth);
95 const RSA_METHOD *RSA_get_default_openssl_method(void)
97 if (default_RSA_meth == NULL)
100 default_RSA_meth=RSA_null_method();
102 #if 0 /* was: #ifdef RSAref */
103 default_RSA_meth=RSA_PKCS1_RSAref();
105 default_RSA_meth=RSA_PKCS1_SSLeay();
110 return default_RSA_meth;
113 const RSA_METHOD *RSA_get_method(const RSA *rsa)
115 return ENGINE_get_RSA(rsa->engine);
119 RSA_METHOD *RSA_set_method(RSA *rsa, RSA_METHOD *meth)
123 if (mtmp->finish) mtmp->finish(rsa);
125 if (meth->init) meth->init(rsa);
129 int RSA_set_method(RSA *rsa, ENGINE *engine)
132 const RSA_METHOD *meth;
134 meth = ENGINE_get_RSA(mtmp);
135 if (!ENGINE_init(engine))
137 if (meth->finish) meth->finish(rsa);
138 rsa->engine = engine;
139 meth = ENGINE_get_RSA(engine);
140 if (meth->init) meth->init(rsa);
141 /* SHOULD ERROR CHECK THIS!!! */
148 RSA *RSA_new_method(RSA_METHOD *meth)
150 RSA *RSA_new_method(ENGINE *engine)
153 const RSA_METHOD *meth;
156 ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
159 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
165 if(ENGINE_init(engine))
166 ret->engine = engine;
171 ret->engine=ENGINE_get_default_RSA();
173 if(ret->engine == NULL)
175 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_LIB_ENGINE);
180 meth = ENGINE_get_RSA(ret->engine);
193 ret->_method_mod_n=NULL;
194 ret->_method_mod_p=NULL;
195 ret->_method_mod_q=NULL;
197 ret->bignum_data=NULL;
198 ret->flags=meth->flags;
199 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
200 if ((meth->init != NULL) && !meth->init(ret))
202 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
209 void RSA_free(RSA *r)
211 const RSA_METHOD *meth;
214 if (r == NULL) return;
216 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
224 fprintf(stderr,"RSA_free, bad reference count\n");
229 meth = ENGINE_get_RSA(r->engine);
230 if (meth->finish != NULL)
232 ENGINE_finish(r->engine);
234 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
236 if (r->n != NULL) BN_clear_free(r->n);
237 if (r->e != NULL) BN_clear_free(r->e);
238 if (r->d != NULL) BN_clear_free(r->d);
239 if (r->p != NULL) BN_clear_free(r->p);
240 if (r->q != NULL) BN_clear_free(r->q);
241 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
242 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
243 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
244 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
245 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
251 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
258 fprintf(stderr, "RSA_up, bad reference count\n");
262 return ((i > 1) ? 1 : 0);
265 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
266 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
268 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
269 new_func, dup_func, free_func);
272 int RSA_set_ex_data(RSA *r, int idx, void *arg)
274 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
277 void *RSA_get_ex_data(const RSA *r, int idx)
279 return(CRYPTO_get_ex_data(&r->ex_data,idx));
282 int RSA_size(const RSA *r)
284 return(BN_num_bytes(r->n));
287 int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
288 RSA *rsa, int padding)
290 return(ENGINE_get_RSA(rsa->engine)->rsa_pub_enc(flen,
291 from, to, rsa, padding));
294 int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
295 RSA *rsa, int padding)
297 return(ENGINE_get_RSA(rsa->engine)->rsa_priv_enc(flen,
298 from, to, rsa, padding));
301 int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
302 RSA *rsa, int padding)
304 return(ENGINE_get_RSA(rsa->engine)->rsa_priv_dec(flen,
305 from, to, rsa, padding));
308 int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
309 RSA *rsa, int padding)
311 return(ENGINE_get_RSA(rsa->engine)->rsa_pub_dec(flen,
312 from, to, rsa, padding));
315 int RSA_flags(const RSA *r)
317 return((r == NULL)?0:ENGINE_get_RSA(r->engine)->flags);
320 void RSA_blinding_off(RSA *rsa)
322 if (rsa->blinding != NULL)
324 BN_BLINDING_free(rsa->blinding);
327 rsa->flags&= ~RSA_FLAG_BLINDING;
330 int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
338 if ((ctx=BN_CTX_new()) == NULL) goto err;
343 if (rsa->blinding != NULL)
344 BN_BLINDING_free(rsa->blinding);
348 if (!BN_rand_range(A,rsa->n)) goto err;
349 if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
351 if (!ENGINE_get_RSA(rsa->engine)->bn_mod_exp(A,A,
352 rsa->e,rsa->n,ctx,rsa->_method_mod_n))
354 rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);
355 rsa->flags|=RSA_FLAG_BLINDING;
360 if (ctx != p_ctx) BN_CTX_free(ctx);
364 int RSA_memory_lock(RSA *r)
368 BIGNUM *bn,**t[6],*b;
371 if (r->d == NULL) return(1);
379 off=k/sizeof(BN_ULONG)+1;
383 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
385 RSAerr(RSA_F_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
389 ul=(BN_ULONG *)&(p[off]);
394 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
395 bn[i].flags=BN_FLG_STATIC_DATA;
397 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
402 /* I should fix this so it can still be done */
403 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);