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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>
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 if ((meth
->init
!= NULL
) && !meth
->init(ret
))
200 CRYPTO_new_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 CRYPTO_free_ex_data(rsa_meth
,r
,&r
->ex_data
);
226 meth
= ENGINE_get_RSA(r
->engine
);
227 if (meth
->finish
!= NULL
)
229 ENGINE_finish(r
->engine
);
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(A
,BN_num_bits(rsa
->n
)-1,1,0)) 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
);