Import of old SSLeay release: SSLeay 0.9.0b
diff --git a/crypto/rsa/rsa_eay.c b/crypto/rsa/rsa_eay.c
new file mode 100644
index 0000000..00f8ea9
--- /dev/null
+++ b/crypto/rsa/rsa_eay.c
@@ -0,0 +1,498 @@
+/* crypto/rsa/rsa_eay.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include "bn.h"
+#include "rsa.h"
+#include "rand.h"
+
+#ifndef NOPROTO
+static int RSA_eay_public_encrypt(int flen, unsigned char *from,
+ unsigned char *to, RSA *rsa,int padding);
+static int RSA_eay_private_encrypt(int flen, unsigned char *from,
+ unsigned char *to, RSA *rsa,int padding);
+static int RSA_eay_public_decrypt(int flen, unsigned char *from,
+ unsigned char *to, RSA *rsa,int padding);
+static int RSA_eay_private_decrypt(int flen, unsigned char *from,
+ unsigned char *to, RSA *rsa,int padding);
+static int RSA_eay_mod_exp(BIGNUM *r0, BIGNUM *i, RSA *rsa);
+static int RSA_eay_init(RSA *rsa);
+static int RSA_eay_finish(RSA *rsa);
+#else
+static int RSA_eay_public_encrypt();
+static int RSA_eay_private_encrypt();
+static int RSA_eay_public_decrypt();
+static int RSA_eay_private_decrypt();
+static int RSA_eay_mod_exp();
+static int RSA_eay_init();
+static int RSA_eay_finish();
+#endif
+
+static RSA_METHOD rsa_pkcs1_eay_meth={
+ "Eric Young's PKCS#1 RSA",
+ RSA_eay_public_encrypt,
+ RSA_eay_public_decrypt,
+ RSA_eay_private_encrypt,
+ RSA_eay_private_decrypt,
+ RSA_eay_mod_exp,
+ BN_mod_exp_mont,
+ RSA_eay_init,
+ RSA_eay_finish,
+ 0,
+ NULL,
+ };
+
+RSA_METHOD *RSA_PKCS1_SSLeay()
+ {
+ return(&rsa_pkcs1_eay_meth);
+ }
+
+static int RSA_eay_public_encrypt(flen, from, to, rsa, padding)
+int flen;
+unsigned char *from;
+unsigned char *to;
+RSA *rsa;
+int padding;
+ {
+ BIGNUM *f=NULL,*ret=NULL;
+ int i,j,k,num=0,r= -1;
+ unsigned char *buf=NULL;
+ BN_CTX *ctx=NULL;
+
+ if ((ctx=BN_CTX_new()) == NULL) goto err;
+ num=BN_num_bytes(rsa->n);
+ if ((buf=(unsigned char *)Malloc(num)) == NULL)
+ {
+ RSAerr(RSA_F_RSA_EAY_PUBLIC_ENCRYPT,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ switch (padding)
+ {
+ case RSA_PKCS1_PADDING:
+ i=RSA_padding_add_PKCS1_type_2(buf,num,from,flen);
+ break;
+ case RSA_SSLV23_PADDING:
+ i=RSA_padding_add_SSLv23(buf,num,from,flen);
+ break;
+ case RSA_NO_PADDING:
+ i=RSA_padding_add_none(buf,num,from,flen);
+ break;
+ default:
+ RSAerr(RSA_F_RSA_EAY_PUBLIC_ENCRYPT,RSA_R_UNKNOWN_PADDING_TYPE);
+ goto err;
+ }
+ if (i <= 0) goto err;
+
+ if (((f=BN_new()) == NULL) || ((ret=BN_new()) == NULL)) goto err;
+
+ if (BN_bin2bn(buf,num,f) == NULL) goto err;
+
+ if ((rsa->method_mod_n == NULL) && (rsa->flags & RSA_FLAG_CACHE_PUBLIC))
+ {
+ if ((rsa->method_mod_n=(char *)BN_MONT_CTX_new()) != NULL)
+ if (!BN_MONT_CTX_set((BN_MONT_CTX *)rsa->method_mod_n,
+ rsa->n,ctx)) goto err;
+ }
+
+ if (!rsa->meth->bn_mod_exp(ret,f,rsa->e,rsa->n,ctx,
+ rsa->method_mod_n)) goto err;
+
+ /* put in leading 0 bytes if the number is less than the
+ * length of the modulus */
+ j=BN_num_bytes(ret);
+ i=BN_bn2bin(ret,&(to[num-j]));
+ for (k=0; k<(num-i); k++)
+ to[k]=0;
+
+ r=num;
+err:
+ if (ctx != NULL) BN_CTX_free(ctx);
+ if (f != NULL) BN_free(f);
+ if (ret != NULL) BN_free(ret);
+ if (buf != NULL)
+ {
+ memset(buf,0,num);
+ Free(buf);
+ }
+ return(r);
+ }
+
+static int RSA_eay_private_encrypt(flen, from, to, rsa, padding)
+int flen;
+unsigned char *from;
+unsigned char *to;
+RSA *rsa;
+int padding;
+ {
+ BIGNUM *f=NULL,*ret=NULL;
+ int i,j,k,num=0,r= -1;
+ unsigned char *buf=NULL;
+ BN_CTX *ctx=NULL;
+
+ if ((ctx=BN_CTX_new()) == NULL) goto err;
+ num=BN_num_bytes(rsa->n);
+ if ((buf=(unsigned char *)Malloc(num)) == NULL)
+ {
+ RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ switch (padding)
+ {
+ case RSA_PKCS1_PADDING:
+ i=RSA_padding_add_PKCS1_type_1(buf,num,from,flen);
+ break;
+ case RSA_NO_PADDING:
+ i=RSA_padding_add_none(buf,num,from,flen);
+ break;
+ case RSA_SSLV23_PADDING:
+ default:
+ RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,RSA_R_UNKNOWN_PADDING_TYPE);
+ goto err;
+ }
+ if (i <= 0) goto err;
+
+ if (((f=BN_new()) == NULL) || ((ret=BN_new()) == NULL)) goto err;
+ if (BN_bin2bn(buf,num,f) == NULL) goto err;
+
+ if ((rsa->flags & RSA_FLAG_BLINDING) && (rsa->blinding == NULL))
+ RSA_blinding_on(rsa,ctx);
+ if (rsa->flags & RSA_FLAG_BLINDING)
+ if (!BN_BLINDING_convert(f,rsa->blinding,ctx)) goto err;
+
+ if ( (rsa->p != NULL) &&
+ (rsa->q != NULL) &&
+ (rsa->dmp1 != NULL) &&
+ (rsa->dmq1 != NULL) &&
+ (rsa->iqmp != NULL))
+ { if (!rsa->meth->rsa_mod_exp(ret,f,rsa)) goto err; }
+ else
+ {
+ if (!rsa->meth->bn_mod_exp(ret,f,rsa->d,rsa->n,ctx)) goto err;
+ }
+
+ if (rsa->flags & RSA_FLAG_BLINDING)
+ if (!BN_BLINDING_invert(ret,rsa->blinding,ctx)) goto err;
+
+ /* put in leading 0 bytes if the number is less than the
+ * length of the modulus */
+ j=BN_num_bytes(ret);
+ i=BN_bn2bin(ret,&(to[num-j]));
+ for (k=0; k<(num-i); k++)
+ to[k]=0;
+
+ r=num;
+err:
+ if (ctx != NULL) BN_CTX_free(ctx);
+ if (ret != NULL) BN_free(ret);
+ if (f != NULL) BN_free(f);
+ if (buf != NULL)
+ {
+ memset(buf,0,num);
+ Free(buf);
+ }
+ return(r);
+ }
+
+static int RSA_eay_private_decrypt(flen, from, to, rsa,padding)
+int flen;
+unsigned char *from;
+unsigned char *to;
+RSA *rsa;
+int padding;
+ {
+ BIGNUM *f=NULL,*ret=NULL;
+ int j,num=0,r= -1;
+ unsigned char *p;
+ unsigned char *buf=NULL;
+ BN_CTX *ctx=NULL;
+
+ ctx=BN_CTX_new();
+ if (ctx == NULL) goto err;
+
+ num=BN_num_bytes(rsa->n);
+
+ if ((buf=(unsigned char *)Malloc(num)) == NULL)
+ {
+ RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* This check was for equallity but PGP does evil things
+ * and chops off the top '0' bytes */
+ if (flen > num)
+ {
+ RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,RSA_R_DATA_GREATER_THAN_MOD_LEN);
+ goto err;
+ }
+
+ /* make data into a big number */
+ if (((ret=BN_new()) == NULL) || ((f=BN_new()) == NULL)) goto err;
+ if (BN_bin2bn(from,(int)flen,f) == NULL) goto err;
+
+ if ((rsa->flags & RSA_FLAG_BLINDING) && (rsa->blinding == NULL))
+ RSA_blinding_on(rsa,ctx);
+ if (rsa->flags & RSA_FLAG_BLINDING)
+ if (!BN_BLINDING_convert(f,rsa->blinding,ctx)) goto err;
+
+ /* do the decrypt */
+ if ( (rsa->p != NULL) &&
+ (rsa->q != NULL) &&
+ (rsa->dmp1 != NULL) &&
+ (rsa->dmq1 != NULL) &&
+ (rsa->iqmp != NULL))
+ { if (!rsa->meth->rsa_mod_exp(ret,f,rsa)) goto err; }
+ else
+ {
+ if (!rsa->meth->bn_mod_exp(ret,f,rsa->d,rsa->n,ctx))
+ goto err;
+ }
+
+ if (rsa->flags & RSA_FLAG_BLINDING)
+ if (!BN_BLINDING_invert(ret,rsa->blinding,ctx)) goto err;
+
+ p=buf;
+ j=BN_bn2bin(ret,p); /* j is only used with no-padding mode */
+
+ switch (padding)
+ {
+ case RSA_PKCS1_PADDING:
+ r=RSA_padding_check_PKCS1_type_2(to,num,buf,j);
+ break;
+ case RSA_SSLV23_PADDING:
+ r=RSA_padding_check_SSLv23(to,num,buf,j);
+ break;
+ case RSA_NO_PADDING:
+ r=RSA_padding_check_none(to,num,buf,j);
+ break;
+ default:
+ RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,RSA_R_UNKNOWN_PADDING_TYPE);
+ goto err;
+ }
+ if (r < 0)
+ RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,RSA_R_PADDING_CHECK_FAILED);
+
+err:
+ if (ctx != NULL) BN_CTX_free(ctx);
+ if (f != NULL) BN_free(f);
+ if (ret != NULL) BN_free(ret);
+ if (buf != NULL)
+ {
+ memset(buf,0,num);
+ Free(buf);
+ }
+ return(r);
+ }
+
+static int RSA_eay_public_decrypt(flen, from, to, rsa, padding)
+int flen;
+unsigned char *from;
+unsigned char *to;
+RSA *rsa;
+int padding;
+ {
+ BIGNUM *f=NULL,*ret=NULL;
+ int i,num=0,r= -1;
+ unsigned char *p;
+ unsigned char *buf=NULL;
+ BN_CTX *ctx=NULL;
+
+ ctx=BN_CTX_new();
+ if (ctx == NULL) goto err;
+
+ num=BN_num_bytes(rsa->n);
+ buf=(unsigned char *)Malloc(num);
+ if (buf == NULL)
+ {
+ RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* This check was for equallity but PGP does evil things
+ * and chops off the top '0' bytes */
+ if (flen > num)
+ {
+ RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,RSA_R_DATA_GREATER_THAN_MOD_LEN);
+ goto err;
+ }
+
+ /* make data into a big number */
+ if (((ret=BN_new()) == NULL) || ((f=BN_new()) == NULL)) goto err;
+
+ if (BN_bin2bn(from,flen,f) == NULL) goto err;
+ /* do the decrypt */
+ if ((rsa->method_mod_n == NULL) && (rsa->flags & RSA_FLAG_CACHE_PUBLIC))
+ {
+ if ((rsa->method_mod_n=(char *)BN_MONT_CTX_new()) != NULL)
+ if (!BN_MONT_CTX_set((BN_MONT_CTX *)rsa->method_mod_n,
+ rsa->n,ctx)) goto err;
+ }
+
+ if (!rsa->meth->bn_mod_exp(ret,f,rsa->e,rsa->n,ctx,
+ rsa->method_mod_n)) goto err;
+
+ p=buf;
+ i=BN_bn2bin(ret,p);
+
+ switch (padding)
+ {
+ case RSA_PKCS1_PADDING:
+ r=RSA_padding_check_PKCS1_type_1(to,num,buf,i);
+ break;
+ case RSA_NO_PADDING:
+ r=RSA_padding_check_none(to,num,buf,i);
+ break;
+ default:
+ RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,RSA_R_UNKNOWN_PADDING_TYPE);
+ goto err;
+ }
+ if (r < 0)
+ RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,RSA_R_PADDING_CHECK_FAILED);
+
+err:
+ if (ctx != NULL) BN_CTX_free(ctx);
+ if (f != NULL) BN_free(f);
+ if (ret != NULL) BN_free(ret);
+ if (buf != NULL)
+ {
+ memset(buf,0,num);
+ Free(buf);
+ }
+ return(r);
+ }
+
+static int RSA_eay_mod_exp(r0, I, rsa)
+BIGNUM *r0;
+BIGNUM *I;
+RSA *rsa;
+ {
+ BIGNUM *r1=NULL,*m1=NULL;
+ int ret=0;
+ BN_CTX *ctx;
+
+ if ((ctx=BN_CTX_new()) == NULL) goto err;
+ m1=BN_new();
+ r1=BN_new();
+ if ((m1 == NULL) || (r1 == NULL)) goto err;
+
+ if (rsa->flags & RSA_FLAG_CACHE_PRIVATE)
+ {
+ if (rsa->method_mod_p == NULL)
+ {
+ if ((rsa->method_mod_p=(char *)
+ BN_MONT_CTX_new()) != NULL)
+ if (!BN_MONT_CTX_set((BN_MONT_CTX *)
+ rsa->method_mod_p,rsa->p,ctx))
+ goto err;
+ }
+ if (rsa->method_mod_q == NULL)
+ {
+ if ((rsa->method_mod_q=(char *)
+ BN_MONT_CTX_new()) != NULL)
+ if (!BN_MONT_CTX_set((BN_MONT_CTX *)
+ rsa->method_mod_q,rsa->q,ctx))
+ goto err;
+ }
+ }
+
+ if (!BN_mod(r1,I,rsa->q,ctx)) goto err;
+ if (!rsa->meth->bn_mod_exp(m1,r1,rsa->dmq1,rsa->q,ctx,
+ rsa->method_mod_q)) goto err;
+
+ if (!BN_mod(r1,I,rsa->p,ctx)) goto err;
+ if (!rsa->meth->bn_mod_exp(r0,r1,rsa->dmp1,rsa->p,ctx,
+ rsa->method_mod_p)) goto err;
+
+ if (!BN_add(r1,r0,rsa->p)) goto err;
+ if (!BN_sub(r0,r1,m1)) goto err;
+
+ if (!BN_mul(r1,r0,rsa->iqmp)) goto err;
+ if (!BN_mod(r0,r1,rsa->p,ctx)) goto err;
+ if (!BN_mul(r1,r0,rsa->q)) goto err;
+ if (!BN_add(r0,r1,m1)) goto err;
+
+ ret=1;
+err:
+ if (m1 != NULL) BN_free(m1);
+ if (r1 != NULL) BN_free(r1);
+ BN_CTX_free(ctx);
+ return(ret);
+ }
+
+static int RSA_eay_init(rsa)
+RSA *rsa;
+ {
+ rsa->flags|=RSA_FLAG_CACHE_PUBLIC|RSA_FLAG_CACHE_PRIVATE;
+ return(1);
+ }
+
+static int RSA_eay_finish(rsa)
+RSA *rsa;
+ {
+ if (rsa->method_mod_n != NULL)
+ BN_MONT_CTX_free((BN_MONT_CTX *)rsa->method_mod_n);
+ if (rsa->method_mod_p != NULL)
+ BN_MONT_CTX_free((BN_MONT_CTX *)rsa->method_mod_p);
+ if (rsa->method_mod_q != NULL)
+ BN_MONT_CTX_free((BN_MONT_CTX *)rsa->method_mod_q);
+ return(1);
+ }
+
+
