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;
70 static int rsa_meth_num=0;
71 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *rsa_meth=NULL;
75 return(RSA_new_method(NULL));
78 void RSA_set_default_openssl_method(const RSA_METHOD *meth)
81 /* We'll need to notify the "openssl" ENGINE of this
82 * change too. We won't bother locking things down at
83 * our end as there was never any locking in these
85 if(default_RSA_meth != meth)
87 default_RSA_meth = meth;
88 e = ENGINE_by_id("openssl");
91 ENGINE_set_RSA(e, meth);
97 const RSA_METHOD *RSA_get_default_openssl_method(void)
99 if (default_RSA_meth == NULL)
102 default_RSA_meth=RSA_null_method();
104 #if 0 /* was: #ifdef RSAref */
105 default_RSA_meth=RSA_PKCS1_RSAref();
107 default_RSA_meth=RSA_PKCS1_SSLeay();
112 return default_RSA_meth;
115 const RSA_METHOD *RSA_get_method(const RSA *rsa)
117 return ENGINE_get_RSA(rsa->engine);
121 RSA_METHOD *RSA_set_method(RSA *rsa, RSA_METHOD *meth)
125 if (mtmp->finish) mtmp->finish(rsa);
127 if (meth->init) meth->init(rsa);
131 int RSA_set_method(RSA *rsa, ENGINE *engine)
134 const RSA_METHOD *meth;
136 meth = ENGINE_get_RSA(mtmp);
137 if (!ENGINE_init(engine))
139 if (meth->finish) meth->finish(rsa);
140 rsa->engine = engine;
141 meth = ENGINE_get_RSA(engine);
142 if (meth->init) meth->init(rsa);
143 /* SHOULD ERROR CHECK THIS!!! */
150 RSA *RSA_new_method(RSA_METHOD *meth)
152 RSA *RSA_new_method(ENGINE *engine)
155 const RSA_METHOD *meth;
158 ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
161 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
167 if((ret->engine=ENGINE_get_default_RSA()) == NULL)
175 meth = ENGINE_get_RSA(ret->engine);
188 ret->_method_mod_n=NULL;
189 ret->_method_mod_p=NULL;
190 ret->_method_mod_q=NULL;
192 ret->bignum_data=NULL;
193 ret->flags=meth->flags;
194 CRYPTO_new_ex_data(rsa_meth,ret,&ret->ex_data);
195 if ((meth->init != NULL) && !meth->init(ret))
197 CRYPTO_free_ex_data(rsa_meth, ret, &ret->ex_data);
204 void RSA_free(RSA *r)
206 const RSA_METHOD *meth;
209 if (r == NULL) return;
211 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
219 fprintf(stderr,"RSA_free, bad reference count\n");
224 meth = ENGINE_get_RSA(r->engine);
225 if (meth->finish != NULL)
227 ENGINE_finish(r->engine);
229 CRYPTO_free_ex_data(rsa_meth,r,&r->ex_data);
231 if (r->n != NULL) BN_clear_free(r->n);
232 if (r->e != NULL) BN_clear_free(r->e);
233 if (r->d != NULL) BN_clear_free(r->d);
234 if (r->p != NULL) BN_clear_free(r->p);
235 if (r->q != NULL) BN_clear_free(r->q);
236 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
237 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
238 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
239 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
240 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
244 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
245 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
248 return(CRYPTO_get_ex_new_index(rsa_meth_num-1,
249 &rsa_meth,argl,argp,new_func,dup_func,free_func));
252 int RSA_set_ex_data(RSA *r, int idx, void *arg)
254 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
257 void *RSA_get_ex_data(const RSA *r, int idx)
259 return(CRYPTO_get_ex_data(&r->ex_data,idx));
262 int RSA_size(const RSA *r)
264 return(BN_num_bytes(r->n));
267 int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
268 RSA *rsa, int padding)
270 return(ENGINE_get_RSA(rsa->engine)->rsa_pub_enc(flen,
271 from, to, rsa, padding));
274 int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
275 RSA *rsa, int padding)
277 return(ENGINE_get_RSA(rsa->engine)->rsa_priv_enc(flen,
278 from, to, rsa, padding));
281 int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
282 RSA *rsa, int padding)
284 return(ENGINE_get_RSA(rsa->engine)->rsa_priv_dec(flen,
285 from, to, rsa, padding));
288 int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
289 RSA *rsa, int padding)
291 return(ENGINE_get_RSA(rsa->engine)->rsa_pub_dec(flen,
292 from, to, rsa, padding));
295 int RSA_flags(const RSA *r)
297 return((r == NULL)?0:ENGINE_get_RSA(r->engine)->flags);
300 void RSA_blinding_off(RSA *rsa)
302 if (rsa->blinding != NULL)
304 BN_BLINDING_free(rsa->blinding);
307 rsa->flags&= ~RSA_FLAG_BLINDING;
310 int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
318 if ((ctx=BN_CTX_new()) == NULL) goto err;
323 if (rsa->blinding != NULL)
324 BN_BLINDING_free(rsa->blinding);
328 if (!BN_rand_range(A,rsa->n)) goto err;
329 if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
331 if (!ENGINE_get_RSA(rsa->engine)->bn_mod_exp(A,A,
332 rsa->e,rsa->n,ctx,rsa->_method_mod_n))
334 rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);
335 rsa->flags|=RSA_FLAG_BLINDING;
340 if (ctx != p_ctx) BN_CTX_free(ctx);
344 int RSA_memory_lock(RSA *r)
348 BIGNUM *bn,**t[6],*b;
351 if (r->d == NULL) return(1);
359 off=k/sizeof(BN_ULONG)+1;
363 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
365 RSAerr(RSA_F_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
369 ul=(BN_ULONG *)&(p[off]);
374 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
375 bn[i].flags=BN_FLG_STATIC_DATA;
377 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
382 /* I should fix this so it can still be done */
383 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);