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_method(const RSA_METHOD *meth)
78 default_RSA_meth = meth;
81 const RSA_METHOD *RSA_get_default_method(void)
83 if (default_RSA_meth == NULL)
86 default_RSA_meth=RSA_null_method();
88 #if 0 /* was: #ifdef RSAref */
89 default_RSA_meth=RSA_PKCS1_RSAref();
91 default_RSA_meth=RSA_PKCS1_SSLeay();
96 return default_RSA_meth;
99 const RSA_METHOD *RSA_get_method(const RSA *rsa)
104 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
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;
110 if (mtmp->finish) mtmp->finish(rsa);
113 ENGINE_finish(rsa->engine);
117 if (meth->init) meth->init(rsa);
121 RSA *RSA_new_method(ENGINE *engine)
125 ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
128 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
132 ret->meth = RSA_get_default_method();
133 ret->engine = engine;
135 ret->engine = ENGINE_get_default_RSA();
138 ret->meth = ENGINE_get_RSA(ret->engine);
141 RSAerr(RSA_F_RSA_NEW_METHOD,
143 ENGINE_finish(ret->engine);
160 ret->_method_mod_n=NULL;
161 ret->_method_mod_p=NULL;
162 ret->_method_mod_q=NULL;
164 ret->bignum_data=NULL;
165 ret->flags=ret->meth->flags;
166 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
167 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
169 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
176 void RSA_free(RSA *r)
180 if (r == NULL) return;
182 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
190 fprintf(stderr,"RSA_free, bad reference count\n");
198 ENGINE_finish(r->engine);
200 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
202 if (r->n != NULL) BN_clear_free(r->n);
203 if (r->e != NULL) BN_clear_free(r->e);
204 if (r->d != NULL) BN_clear_free(r->d);
205 if (r->p != NULL) BN_clear_free(r->p);
206 if (r->q != NULL) BN_clear_free(r->q);
207 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
208 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
209 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
210 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
211 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
215 int RSA_up_ref(RSA *r)
217 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
224 fprintf(stderr, "RSA_up_ref, bad reference count\n");
228 return ((i > 1) ? 1 : 0);
231 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
232 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
234 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
235 new_func, dup_func, free_func);
238 int RSA_set_ex_data(RSA *r, int idx, void *arg)
240 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
243 void *RSA_get_ex_data(const RSA *r, int idx)
245 return(CRYPTO_get_ex_data(&r->ex_data,idx));
248 int RSA_size(const RSA *r)
250 return(BN_num_bytes(r->n));
253 int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
254 RSA *rsa, int padding)
256 return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
259 int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
260 RSA *rsa, int padding)
262 return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
265 int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
266 RSA *rsa, int padding)
268 return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
271 int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
272 RSA *rsa, int padding)
274 return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
277 int RSA_flags(const RSA *r)
279 return((r == NULL)?0:r->meth->flags);
282 void RSA_blinding_off(RSA *rsa)
284 if (rsa->blinding != NULL)
286 BN_BLINDING_free(rsa->blinding);
289 rsa->flags&= ~RSA_FLAG_BLINDING;
292 int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
300 if ((ctx=BN_CTX_new()) == NULL) goto err;
305 if (rsa->blinding != NULL)
306 BN_BLINDING_free(rsa->blinding);
310 if (!BN_rand_range(A,rsa->n)) goto err;
311 if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
313 if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
315 rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);
316 rsa->flags|=RSA_FLAG_BLINDING;
321 if (ctx != p_ctx) BN_CTX_free(ctx);
325 int RSA_memory_lock(RSA *r)
329 BIGNUM *bn,**t[6],*b;
332 if (r->d == NULL) return(1);
340 off=k/sizeof(BN_ULONG)+1;
344 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
346 RSAerr(RSA_F_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
350 ul=(BN_ULONG *)&(p[off]);
355 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
356 bn[i].flags=BN_FLG_STATIC_DATA;
358 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
363 /* I should fix this so it can still be done */
364 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);