Add RSA support

lib/dns/sec/openssl/bn_blind.c

@@ -0,0 +1,147 @@
+/* crypto/bn/bn_blind.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 <config.h>
+#include "../rename.h"
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include "bn_lcl.h"
+
+BN_BLINDING *BN_BLINDING_new(BIGNUM *A, BIGNUM *Ai, BIGNUM *mod)
+	{
+	BN_BLINDING *ret=NULL;
+
+	bn_check_top(Ai);
+	bn_check_top(mod);
+
+	if ((ret=(BN_BLINDING *)Malloc(sizeof(BN_BLINDING))) == NULL)
+		{
+		BNerr(BN_F_BN_BLINDING_NEW,ERR_R_MALLOC_FAILURE);
+		return(NULL);
+		}
+	memset(ret,0,sizeof(BN_BLINDING));
+	if ((ret->A=BN_new()) == NULL) goto err;
+	if ((ret->Ai=BN_new()) == NULL) goto err;
+	if (!BN_copy(ret->A,A)) goto err;
+	if (!BN_copy(ret->Ai,Ai)) goto err;
+	ret->mod=mod;
+	return(ret);
+err:
+	if (ret != NULL) BN_BLINDING_free(ret);
+	return(NULL);
+	}
+
+void BN_BLINDING_free(BN_BLINDING *r)
+	{
+	if(r == NULL)
+	    return;
+
+	if (r->A  != NULL) BN_free(r->A );
+	if (r->Ai != NULL) BN_free(r->Ai);
+	Free(r);
+	}
+
+int BN_BLINDING_update(BN_BLINDING *b, BN_CTX *ctx)
+	{
+	int ret=0;
+
+	if ((b->A == NULL) || (b->Ai == NULL))
+		{
+		BNerr(BN_F_BN_BLINDING_UPDATE,BN_R_NOT_INITIALIZED);
+		goto err;
+		}
+		
+	if (!BN_mod_mul(b->A,b->A,b->A,b->mod,ctx)) goto err;
+	if (!BN_mod_mul(b->Ai,b->Ai,b->Ai,b->mod,ctx)) goto err;
+
+	ret=1;
+err:
+	return(ret);
+	}
+
+int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx)
+	{
+	bn_check_top(n);
+
+	if ((b->A == NULL) || (b->Ai == NULL))
+		{
+		BNerr(BN_F_BN_BLINDING_CONVERT,BN_R_NOT_INITIALIZED);
+		return(0);
+		}
+	return(BN_mod_mul(n,n,b->A,b->mod,ctx));
+	}
+
+int BN_BLINDING_invert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx)
+	{
+	int ret;
+
+	bn_check_top(n);
+	if ((b->A == NULL) || (b->Ai == NULL))
+		{
+		BNerr(BN_F_BN_BLINDING_INVERT,BN_R_NOT_INITIALIZED);
+		return(0);
+		}
+	if ((ret=BN_mod_mul(n,n,b->Ai,b->mod,ctx)) >= 0)
+		{
+		if (!BN_BLINDING_update(b,ctx))
+			return(0);
+		}
+	return(ret);
+	}
+