354 lines
10 KiB
C
354 lines
10 KiB
C
/* rsaref/rsaref.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include "bn.h"
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#include "rsa.h"
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#include "rsaref.h"
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#include "rand.h"
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/*
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* RSAREFerr(RSAREF_F_RSA_REF_BN2BIN,RSAREF_R_CONTENT_ENCODING);
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* RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_DECRYPT,RSAREF_R_DATA);
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* RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_ENCRYPT,RSAREF_R_DIGEST_ALGORITHM);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_DECRYPT,RSAREF_R_ENCODING);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_KEY);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_KEY_ENCODING);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_LEN);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_MODULUS_LEN);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_NEED_RANDOM);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_PRIVATE_KEY);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_PUBLIC_KEY);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_SIGNATURE);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_SIGNATURE_ENCODING);
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* RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,RSAREF_R_ENCRYPTION_ALGORITHM);
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* RSAREFerr(RSAREF_F_RSAREF_BN2BIN,ERR_R_BN_LIB);
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*/
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#ifndef NOPROTO
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static int RSAref_bn2bin(BIGNUM * from, unsigned char* to, int max);
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#ifdef undef
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static BIGNUM* RSAref_bin2bn(unsigned char* from, BIGNUM * to, int max);
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#endif
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static int RSAref_Public_eay2ref(RSA * from, RSArefPublicKey * to);
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static int RSAref_Private_eay2ref(RSA * from, RSArefPrivateKey * to);
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int RSA_ref_private_decrypt(int len, unsigned char *from,
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unsigned char *to, RSA *rsa, int padding);
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int RSA_ref_private_encrypt(int len, unsigned char *from,
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unsigned char *to, RSA *rsa, int padding);
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int RSA_ref_public_encrypt(int len, unsigned char *from,
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unsigned char *to, RSA *rsa, int padding);
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int RSA_ref_public_decrypt(int len, unsigned char *from,
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unsigned char *to, RSA *rsa, int padding);
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static int BN_ref_mod_exp(BIGNUM *r,BIGNUM *a,BIGNUM *p,BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
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static int RSA_ref_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa);
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#else
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static int RSAref_bn2bin();
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#ifdef undef
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static BIGNUM* RSAref_bin2bn();
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#endif
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static int RSAref_Public_eay2ref();
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static int RSAref_Private_eay2ref();
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static int BN_ref_mod_exp();
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static int RSA_ref_mod_exp();
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int RSA_ref_private_decrypt();
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int RSA_ref_private_encrypt();
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int RSA_ref_public_encrypt();
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int RSA_ref_public_decrypt();
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static int BN_ref_mod_exp();
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static int RSA_ref_mod_exp();
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#endif
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static RSA_METHOD rsa_pkcs1_ref_meth={
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"RSAref PKCS#1 RSA",
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RSA_ref_public_encrypt,
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RSA_ref_public_decrypt,
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RSA_ref_private_encrypt,
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RSA_ref_private_decrypt,
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RSA_ref_mod_exp,
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BN_ref_mod_exp,
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NULL,
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NULL,
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0,
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NULL,
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};
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RSA_METHOD *RSA_PKCS1_RSAref()
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{
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return(&rsa_pkcs1_ref_meth);
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}
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static int RSA_ref_mod_exp(r0, I, rsa)
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BIGNUM *r0;
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BIGNUM *I;
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RSA *rsa;
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{
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RSAREFerr(RSAREF_F_RSA_REF_MOD_EXP,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return(0);
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}
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static int BN_ref_mod_exp(r,a,p,m,ctx,m_ctx)
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BIGNUM *r,*a,*p,*m;
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BN_CTX *ctx;
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BN_MONT_CTX *m_ctx;
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{
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RSAREFerr(RSAREF_F_BN_REF_MOD_EXP,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return(0);
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}
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static int RSAref_bn2bin(from,to,max)
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BIGNUM *from;
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unsigned char *to; /* [max] */
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int max;
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{
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int i;
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i=BN_num_bytes(from);
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if (i > max)
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{
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RSAREFerr(RSAREF_F_RSAREF_BN2BIN,RSAREF_R_LEN);
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return(0);
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}
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memset(to,0,(unsigned int)max);
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if (!BN_bn2bin(from,&(to[max-i])))
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return(0);
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return(1);
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}
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#ifdef undef
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static BIGNUM *RSAref_bin2bn(from,to,max)
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unsigned char *from; /* [max] */
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BIGNUM *to;
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int max;
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{
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int i;
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BIGNUM *ret;
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for (i=0; i<max; i++)
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if (from[i]) break;
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ret=BN_bin2bn(&(from[i]),max-i,to);
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return(ret);
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}
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static int RSAref_Public_ref2eay(from,to)
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RSArefPublicKey *from;
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RSA *to;
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{
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to->n=RSAref_bin2bn(from->m,NULL,RSAref_MAX_LEN);
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to->e=RSAref_bin2bn(from->e,NULL,RSAref_MAX_LEN);
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if ((to->n == NULL) || (to->e == NULL)) return(0);
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return(1);
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}
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#endif
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static int RSAref_Public_eay2ref(from,to)
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RSA *from;
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RSArefPublicKey *to;
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{
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to->bits=BN_num_bits(from->n);
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if (!RSAref_bn2bin(from->n,to->m,RSAref_MAX_LEN)) return(0);
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if (!RSAref_bn2bin(from->e,to->e,RSAref_MAX_LEN)) return(0);
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return(1);
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}
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#ifdef undef
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static int RSAref_Private_ref2eay(from,to)
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RSArefPrivateKey *from;
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RSA *to;
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{
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if ((to->n=RSAref_bin2bn(from->m,NULL,RSAref_MAX_LEN)) == NULL)
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return(0);
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if ((to->e=RSAref_bin2bn(from->e,NULL,RSAref_MAX_LEN)) == NULL)
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return(0);
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if ((to->d=RSAref_bin2bn(from->d,NULL,RSAref_MAX_LEN)) == NULL)
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return(0);
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if ((to->p=RSAref_bin2bn(from->prime[0],NULL,RSAref_MAX_PLEN)) == NULL)
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return(0);
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if ((to->q=RSAref_bin2bn(from->prime[1],NULL,RSAref_MAX_PLEN)) == NULL)
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return(0);
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if ((to->dmp1=RSAref_bin2bn(from->pexp[0],NULL,RSAref_MAX_PLEN))
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== NULL)
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return(0);
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if ((to->dmq1=RSAref_bin2bn(from->pexp[1],NULL,RSAref_MAX_PLEN))
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== NULL)
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return(0);
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if ((to->iqmp=RSAref_bin2bn(from->coef,NULL,RSAref_MAX_PLEN)) == NULL)
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return(0);
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return(1);
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}
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#endif
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static int RSAref_Private_eay2ref(from,to)
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RSA *from;
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RSArefPrivateKey *to;
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{
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to->bits=BN_num_bits(from->n);
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if (!RSAref_bn2bin(from->n,to->m,RSAref_MAX_LEN)) return(0);
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if (!RSAref_bn2bin(from->e,to->e,RSAref_MAX_LEN)) return(0);
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if (!RSAref_bn2bin(from->d,to->d,RSAref_MAX_LEN)) return(0);
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if (!RSAref_bn2bin(from->p,to->prime[0],RSAref_MAX_PLEN)) return(0);
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if (!RSAref_bn2bin(from->q,to->prime[1],RSAref_MAX_PLEN)) return(0);
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if (!RSAref_bn2bin(from->dmp1,to->pexp[0],RSAref_MAX_PLEN)) return(0);
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if (!RSAref_bn2bin(from->dmq1,to->pexp[1],RSAref_MAX_PLEN)) return(0);
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if (!RSAref_bn2bin(from->iqmp,to->coef,RSAref_MAX_PLEN)) return(0);
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return(1);
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}
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int RSA_ref_private_decrypt(len,from,to,rsa,padding)
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int len;
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unsigned char *from,*to;
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RSA *rsa;
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int padding;
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{
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int i,outlen= -1;
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RSArefPrivateKey RSAkey;
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if (!RSAref_Private_eay2ref(rsa,&RSAkey))
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goto err;
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if ((i=RSAPrivateDecrypt(to,&outlen,from,len,&RSAkey)) != 0)
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{
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RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_DECRYPT,i);
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outlen= -1;
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}
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err:
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memset(&RSAkey,0,sizeof(RSAkey));
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return(outlen);
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}
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int RSA_ref_private_encrypt(len,from,to,rsa,padding)
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int len;
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unsigned char *from,*to;
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RSA *rsa;
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int padding;
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{
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int i,outlen= -1;
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RSArefPrivateKey RSAkey;
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if (!RSAref_Private_eay2ref(rsa,&RSAkey))
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goto err;
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if ((i=RSAPrivateEncrypt(to,&outlen,from,len,&RSAkey)) != 0)
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{
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RSAREFerr(RSAREF_F_RSA_REF_PRIVATE_ENCRYPT,i);
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outlen= -1;
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}
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err:
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memset(&RSAkey,0,sizeof(RSAkey));
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return(outlen);
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}
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int RSA_ref_public_decrypt(len,from,to,rsa,padding)
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int len;
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unsigned char *from,*to;
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RSA *rsa;
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int padding;
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{
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int i,outlen= -1;
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RSArefPublicKey RSAkey;
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if (!RSAref_Public_eay2ref(rsa,&RSAkey))
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goto err;
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if ((i=RSAPublicDecrypt(to,&outlen,from,len,&RSAkey)) != 0)
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{
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RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_DECRYPT,i);
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outlen= -1;
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}
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err:
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memset(&RSAkey,0,sizeof(RSAkey));
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return(outlen);
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}
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int RSA_ref_public_encrypt(len,from,to,rsa,padding)
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int len;
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unsigned char *from,*to;
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RSA *rsa;
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int padding;
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{
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int outlen= -1;
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int i;
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RSArefPublicKey RSAkey;
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RSARandomState rnd;
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unsigned char buf[16];
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R_RandomInit(&rnd);
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R_GetRandomBytesNeeded((unsigned int *)&i,&rnd);
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while (i > 0)
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{
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RAND_bytes(buf,16);
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R_RandomUpdate(&rnd,buf,(unsigned int)((i>16)?16:i));
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i-=16;
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}
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if (!RSAref_Public_eay2ref(rsa,&RSAkey))
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goto err;
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if ((i=RSAPublicEncrypt(to,&outlen,from,len,&RSAkey,&rnd)) != 0)
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{
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RSAREFerr(RSAREF_F_RSA_REF_PUBLIC_ENCRYPT,i);
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outlen= -1;
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goto err;
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}
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err:
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memset(&RSAkey,0,sizeof(RSAkey));
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R_RandomFinal(&rnd);
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memset(&rnd,0,sizeof(rnd));
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return(outlen);
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}
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