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>
66 const char *RSA_version="RSA" OPENSSL_VERSION_PTEXT;
68 static RSA_METHOD *default_RSA_meth=NULL;
69 static int rsa_meth_num=0;
70 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *rsa_meth=NULL;
74 return(RSA_new_method(NULL));
77 void RSA_set_default_method(RSA_METHOD *meth)
79 default_RSA_meth=meth;
82 RSA_METHOD *RSA_get_default_method(void)
84 return default_RSA_meth;
87 RSA_METHOD *RSA_get_method(RSA *rsa)
92 RSA_METHOD *RSA_set_method(RSA *rsa, RSA_METHOD *meth)
96 if (mtmp->finish) mtmp->finish(rsa);
98 if (meth->init) meth->init(rsa);
102 RSA *RSA_new_method(RSA_METHOD *meth)
106 if (default_RSA_meth == NULL)
109 default_RSA_meth=RSA_null_method();
112 default_RSA_meth=RSA_PKCS1_RSAref();
114 default_RSA_meth=RSA_PKCS1_SSLeay();
118 ret=(RSA *)Malloc(sizeof(RSA));
121 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
126 ret->meth=default_RSA_meth;
141 ret->_method_mod_n=NULL;
142 ret->_method_mod_p=NULL;
143 ret->_method_mod_q=NULL;
145 ret->bignum_data=NULL;
146 ret->flags=ret->meth->flags;
147 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
153 CRYPTO_new_ex_data(rsa_meth,ret,&ret->ex_data);
157 void RSA_free(RSA *r)
161 if (r == NULL) return;
163 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
171 fprintf(stderr,"RSA_free, bad reference count\n");
176 CRYPTO_free_ex_data(rsa_meth,r,&r->ex_data);
178 if (r->meth->finish != NULL)
181 if (r->n != NULL) BN_clear_free(r->n);
182 if (r->e != NULL) BN_clear_free(r->e);
183 if (r->d != NULL) BN_clear_free(r->d);
184 if (r->p != NULL) BN_clear_free(r->p);
185 if (r->q != NULL) BN_clear_free(r->q);
186 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
187 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
188 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
189 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
190 if (r->bignum_data != NULL) Free_locked(r->bignum_data);
194 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
195 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
198 return(CRYPTO_get_ex_new_index(rsa_meth_num-1,
199 &rsa_meth,argl,argp,new_func,dup_func,free_func));
202 int RSA_set_ex_data(RSA *r, int idx, void *arg)
204 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
207 void *RSA_get_ex_data(RSA *r, int idx)
209 return(CRYPTO_get_ex_data(&r->ex_data,idx));
214 return(BN_num_bytes(r->n));
217 int RSA_public_encrypt(int flen, unsigned char *from, unsigned char *to,
218 RSA *rsa, int padding)
220 return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
223 int RSA_private_encrypt(int flen, unsigned char *from, unsigned char *to,
224 RSA *rsa, int padding)
226 return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
229 int RSA_private_decrypt(int flen, unsigned char *from, unsigned char *to,
230 RSA *rsa, int padding)
232 return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
235 int RSA_public_decrypt(int flen, unsigned char *from, unsigned char *to,
236 RSA *rsa, int padding)
238 return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
241 int RSA_flags(RSA *r)
243 return((r == NULL)?0:r->meth->flags);
246 void RSA_blinding_off(RSA *rsa)
248 if (rsa->blinding != NULL)
250 BN_BLINDING_free(rsa->blinding);
253 rsa->flags&= ~RSA_FLAG_BLINDING;
256 int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
264 if ((ctx=BN_CTX_new()) == NULL) goto err;
269 if (rsa->blinding != NULL)
270 BN_BLINDING_free(rsa->blinding);
274 if (!BN_rand(A,BN_num_bits(rsa->n)-1,1,0)) goto err;
275 if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
277 if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
279 rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);
280 rsa->flags|=RSA_FLAG_BLINDING;
285 if (ctx != p_ctx) BN_CTX_free(ctx);
289 int RSA_memory_lock(RSA *r)
293 BIGNUM *bn,**t[6],*b;
296 if (r->d == NULL) return(1);
304 off=k/sizeof(BN_ULONG)+1;
308 if ((p=Malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
310 RSAerr(RSA_F_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
314 ul=(BN_ULONG *)&(p[off]);
319 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
320 bn[i].flags=BN_FLG_STATIC_DATA;
322 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
327 /* I should fix this so it can still be done */
328 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);