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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/rsa/rsa_lib.c
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
*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
,(char *)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
,(char *)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
, char *argp
, int (*new_func
)(),
195 int (*dup_func
)(), void (*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
, char *arg
)
204 return(CRYPTO_set_ex_data(&r
->ex_data
,idx
,arg
));
207 char *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
);
281 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
);