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.]
62 #include <openssl/bn.h>
63 #include <openssl/rsa.h>
64 #include <openssl/rsaref.h>
65 #include <openssl/rand.h>
67 static int RSAref_bn2bin(BIGNUM * from, unsigned char* to, int max);
69 static BIGNUM* RSAref_bin2bn(unsigned char* from, BIGNUM * to, int max);
71 static int RSAref_Public_eay2ref(RSA * from, RSArefPublicKey * to);
72 static int RSAref_Private_eay2ref(RSA * from, RSArefPrivateKey * to);
73 int RSA_ref_private_decrypt(int len, unsigned char *from,
74 unsigned char *to, RSA *rsa, int padding);
75 int RSA_ref_private_encrypt(int len, unsigned char *from,
76 unsigned char *to, RSA *rsa, int padding);
77 int RSA_ref_public_encrypt(int len, unsigned char *from,
78 unsigned char *to, RSA *rsa, int padding);
79 int RSA_ref_public_decrypt(int len, unsigned char *from,
80 unsigned char *to, RSA *rsa, int padding);
81 static int BN_ref_mod_exp(BIGNUM *r,BIGNUM *a,const BIGNUM *p,const BIGNUM *m,
82 BN_CTX *ctx, BN_MONT_CTX *m_ctx);
83 static int RSA_ref_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa);
84 static RSA_METHOD rsa_pkcs1_ref_meth={
86 RSA_ref_public_encrypt,
87 RSA_ref_public_decrypt,
88 RSA_ref_private_encrypt,
89 RSA_ref_private_decrypt,
98 RSA_METHOD *RSA_PKCS1_RSAref(void)
100 return(&rsa_pkcs1_ref_meth);
103 static int RSA_ref_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa)
105 RSAREFerr(RSAREF_F_RSA_REF_MOD_EXP,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
109 static int BN_ref_mod_exp(BIGNUM *r, BIGNUM *a, const BIGNUM *p,
110 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
112 RSAREFerr(RSAREF_F_BN_REF_MOD_EXP,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
116 /* unsigned char *to: [max] */
117 static int RSAref_bn2bin(BIGNUM *from, unsigned char *to, int max)
121 i=BN_num_bytes(from);
124 RSAREFerr(RSAREF_F_RSAREF_BN2BIN,RSAREF_R_LEN);
128 memset(to,0,(unsigned int)max);
129 if (!BN_bn2bin(from,&(to[max-i])))
135 /* unsigned char *from: [max] */
136 static BIGNUM *RSAref_bin2bn(unsigned char *from, BIGNUM *to, int max)
141 for (i=0; i<max; i++)
144 ret=BN_bin2bn(&(from[i]),max-i,to);
148 static int RSAref_Public_ref2eay(RSArefPublicKey *from, RSA *to)
150 to->n=RSAref_bin2bn(from->m,NULL,RSAref_MAX_LEN);
151 to->e=RSAref_bin2bn(from->e,NULL,RSAref_MAX_LEN);
152 if ((to->n == NULL) || (to->e == NULL)) return(0);
157 static int RSAref_Public_eay2ref(RSA *from, RSArefPublicKey *to)
159 to->bits=BN_num_bits(from->n);
160 if (!RSAref_bn2bin(from->n,to->m,RSAref_MAX_LEN)) return(0);
161 if (!RSAref_bn2bin(from->e,to->e,RSAref_MAX_LEN)) return(0);
166 static int RSAref_Private_ref2eay(RSArefPrivateKey *from, RSA *to)
168 if ((to->n=RSAref_bin2bn(from->m,NULL,RSAref_MAX_LEN)) == NULL)
170 if ((to->e=RSAref_bin2bn(from->e,NULL,RSAref_MAX_LEN)) == NULL)
172 if ((to->d=RSAref_bin2bn(from->d,NULL,RSAref_MAX_LEN)) == NULL)
174 if ((to->p=RSAref_bin2bn(from->prime[0],NULL,RSAref_MAX_PLEN)) == NULL)
176 if ((to->q=RSAref_bin2bn(from->prime[1],NULL,RSAref_MAX_PLEN)) == NULL)
178 if ((to->dmp1=RSAref_bin2bn(from->pexp[0],NULL,RSAref_MAX_PLEN))
181 if ((to->dmq1=RSAref_bin2bn(from->pexp[1],NULL,RSAref_MAX_PLEN))
184 if ((to->iqmp=RSAref_bin2bn(from->coef,NULL,RSAref_MAX_PLEN)) == NULL)
190 static int RSAref_Private_eay2ref(RSA *from, RSArefPrivateKey *to)
192 to->bits=BN_num_bits(from->n);
193 if (!RSAref_bn2bin(from->n,to->m,RSAref_MAX_LEN)) return(0);
194 if (!RSAref_bn2bin(from->e,to->e,RSAref_MAX_LEN)) return(0);
195 if (!RSAref_bn2bin(from->d,to->d,RSAref_MAX_LEN)) return(0);
196 if (!RSAref_bn2bin(from->p,to->prime[0],RSAref_MAX_PLEN)) return(0);
197 if (!RSAref_bn2bin(from->q,to->prime[1],RSAref_MAX_PLEN)) return(0);
198 if (!RSAref_bn2bin(from->dmp1,to->pexp[0],RSAref_MAX_PLEN)) return(0);
199 if (!RSAref_bn2bin(from->dmq1,to->pexp[1],RSAref_MAX_PLEN)) return(0);
200 if (!RSAref_bn2bin(from->iqmp,to->coef,RSAref_MAX_PLEN)) return(0);
204 int RSA_ref_private_decrypt(int len, unsigned char *from, unsigned char *to,
205 RSA *rsa, int padding)
208 RSArefPrivateKey RSAkey;
210 if (!RSAref_Private_eay2ref(rsa,&RSAkey))
212 if ((i=RSAPrivateDecrypt(to,&outlen,from,len,&RSAkey)) != 0)
214 RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_DECRYPT,i);
218 memset(&RSAkey,0,sizeof(RSAkey));
222 int RSA_ref_private_encrypt(int len, unsigned char *from, unsigned char *to,
223 RSA *rsa, int padding)
226 RSArefPrivateKey RSAkey;
228 if (padding != RSA_PKCS1_PADDING)
230 RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_ENCRYPT, RSA_R_UNKNOWN_PADDING_TYPE);
233 if (!RSAref_Private_eay2ref(rsa,&RSAkey))
235 if ((i=RSAPrivateEncrypt(to,&outlen,from,len,&RSAkey)) != 0)
237 RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_ENCRYPT,i);
241 memset(&RSAkey,0,sizeof(RSAkey));
245 int RSA_ref_public_decrypt(int len, unsigned char *from, unsigned char *to,
246 RSA *rsa, int padding)
249 RSArefPublicKey RSAkey;
251 if (!RSAref_Public_eay2ref(rsa,&RSAkey))
253 if ((i=RSAPublicDecrypt(to,&outlen,from,len,&RSAkey)) != 0)
255 RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_DECRYPT,i);
259 memset(&RSAkey,0,sizeof(RSAkey));
263 int RSA_ref_public_encrypt(int len, unsigned char *from, unsigned char *to,
264 RSA *rsa, int padding)
268 RSArefPublicKey RSAkey;
270 unsigned char buf[16];
272 if (padding != RSA_PKCS1_PADDING && padding != RSA_SSLV23_PADDING)
274 RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT, RSA_R_UNKNOWN_PADDING_TYPE);
279 R_GetRandomBytesNeeded((unsigned int *)&i,&rnd);
282 if (RAND_bytes(buf,16) <= 0)
284 R_RandomUpdate(&rnd,buf,(unsigned int)((i>16)?16:i));
288 if (!RSAref_Public_eay2ref(rsa,&RSAkey))
290 if ((i=RSAPublicEncrypt(to,&outlen,from,len,&RSAkey,&rnd)) != 0)
292 RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,i);
297 memset(&RSAkey,0,sizeof(RSAkey));
299 memset(&rnd,0,sizeof(rnd));
305 static void *dummy=&dummy;