deFUDify: don't require OPENSSL_EC_BIN_PT_COMP

crypto/ec/ec2_smpt.c

-/* crypto/ec/ec2_smpt.c */
-/* This code was originally written by Douglas Stebila 
- * <dstebila@student.math.uwaterloo.ca> for the OpenSSL project.
- */
-/* ====================================================================
- * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
- *
- * 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 above 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 acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED 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 OpenSSL PROJECT OR
- * ITS 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.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-
-/* Calaculates and sets the affine coordinates of an EC_POINT from the given
- * compressed coordinates.  Uses algorithm 2.3.4 of SEC 1. 
- * Note that the simple implementation only uses affine coordinates.
- *
- * This algorithm is patented by Certicom Corp. under US Patent 6,141,420
- * (for licensing information, contact licensing@certicom.com).
- * This function is disabled by default and can be enabled by defining the 
- * preprocessor macro OPENSSL_EC_BIN_PT_COMP at Configure-time.
- */
-int ec_GF2m_simple_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *point,
-	const BIGNUM *x_, int y_bit, BN_CTX *ctx)
-	{
-#ifndef OPENSSL_EC_BIN_PT_COMP	
-	ECerr(EC_F_EC_GF2M_SIMPLE_SET_COMPRESSED_COORDINATES, ERR_R_DISABLED);
-	return 0;
-#else
-	BN_CTX *new_ctx = NULL;
-	BIGNUM *tmp, *x, *y, *z;
-	int ret = 0, z0;
-
-	/* clear error queue */
-	ERR_clear_error();
-
-	if (ctx == NULL)
-		{
-		ctx = new_ctx = BN_CTX_new();
-		if (ctx == NULL)
-			return 0;
-		}
-
-	y_bit = (y_bit != 0) ? 1 : 0;
-
-	BN_CTX_start(ctx);
-	tmp = BN_CTX_get(ctx);
-	x = BN_CTX_get(ctx);
-	y = BN_CTX_get(ctx);
-	z = BN_CTX_get(ctx);
-	if (z == NULL) goto err;
-
-	if (!BN_GF2m_mod_arr(x, x_, group->poly)) goto err;
-	if (BN_is_zero(x))
-		{
-		if (!BN_GF2m_mod_sqrt_arr(y, &group->b, group->poly, ctx)) goto err;
-		}
-	else
-		{
-		if (!group->meth->field_sqr(group, tmp, x, ctx)) goto err;
-		if (!group->meth->field_div(group, tmp, &group->b, tmp, ctx)) goto err;
-		if (!BN_GF2m_add(tmp, &group->a, tmp)) goto err;
-		if (!BN_GF2m_add(tmp, x, tmp)) goto err;
-		if (!BN_GF2m_mod_solve_quad_arr(z, tmp, group->poly, ctx))
-			{
-			unsigned long err = ERR_peek_last_error();
-			
-			if (ERR_GET_LIB(err) == ERR_LIB_BN && ERR_GET_REASON(err) == BN_R_NO_SOLUTION)
-				{
-				ERR_clear_error();
-				ECerr(EC_F_EC_GF2M_SIMPLE_SET_COMPRESSED_COORDINATES, EC_R_INVALID_COMPRESSED_POINT);
-				}
-			else
-				ECerr(EC_F_EC_GF2M_SIMPLE_SET_COMPRESSED_COORDINATES, ERR_R_BN_LIB);
-			goto err;
-			}
-		z0 = (BN_is_odd(z)) ? 1 : 0;
-		if (!group->meth->field_mul(group, y, x, z, ctx)) goto err;
-		if (z0 != y_bit)
-			{
-			if (!BN_GF2m_add(y, y, x)) goto err;
-			}
-		}
-
-	if (!EC_POINT_set_affine_coordinates_GF2m(group, point, x, y, ctx)) goto err;
-
-	ret = 1;
-
- err:
-	BN_CTX_end(ctx);
-	if (new_ctx != NULL)
-		BN_CTX_free(new_ctx);
-	return ret;
-#endif
-	}