Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/ec/ec2_oct.c

Index: openssl/crypto/ec/ec2_oct.c
diff --git a/openssl/crypto/ec/ec2_oct.c b/openssl/crypto/ec/ec2_oct.c
deleted file mode 100644
index f1d75e5ddf66a126b9afd9096f94e056048bde57..0000000000000000000000000000000000000000
--- a/openssl/crypto/ec/ec2_oct.c
+++ /dev/null
@@ -1,407 +0,0 @@
-/* crypto/ec/ec2_oct.c */
-/* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- *
- * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
- * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
- * to the OpenSSL project.
- *
- * The ECC Code is licensed pursuant to the OpenSSL open source
- * license provided below.
- *
- * The software is originally written by Sheueling Chang Shantz and
- * Douglas Stebila of Sun Microsystems Laboratories.
- *
- */
-/* ====================================================================
- * Copyright (c) 1998-2005 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).
- *
- */
-
-#include <openssl/err.h>
-
-#include "ec_lcl.h"
-
-#ifndef OPENSSL_NO_EC2M
-
-/* Calculates 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.
- *
- * The method is from the following publication:
- * 
- *     Harper, Menezes, Vanstone:
- *     "Public-Key Cryptosystems with Very Small Key Lengths",
- *     EUROCRYPT '92, Springer-Verlag LNCS 658,
- *     published February 1993
- *
- * US Patents 6,141,420 and 6,618,483 (Vanstone, Mullin, Agnew) describe
- * the same method, but claim no priority date earlier than July 29, 1994
- * (and additionally fail to cite the EUROCRYPT '92 publication as prior art).
- */
-int ec_GF2m_simple_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *point,
-	const BIGNUM *x_, int y_bit, BN_CTX *ctx)
-	{
-	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;
-	}
-
-
-/* Converts an EC_POINT to an octet string.  
- * If buf is NULL, the encoded length will be returned.
- * If the length len of buf is smaller than required an error will be returned.
- */
-size_t ec_GF2m_simple_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form,
-	unsigned char *buf, size_t len, BN_CTX *ctx)
-	{
-	size_t ret;
-	BN_CTX *new_ctx = NULL;
-	int used_ctx = 0;
-	BIGNUM *x, *y, *yxi;
-	size_t field_len, i, skip;
-
-	if ((form != POINT_CONVERSION_COMPRESSED)
-		&& (form != POINT_CONVERSION_UNCOMPRESSED)
-		&& (form != POINT_CONVERSION_HYBRID))
-		{
-		ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_INVALID_FORM);
-		goto err;
-		}
-
-	if (EC_POINT_is_at_infinity(group, point))
-		{
-		/* encodes to a single 0 octet */
-		if (buf != NULL)
-			{
-			if (len < 1)
-				{
-				ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_BUFFER_TOO_SMALL);
-				return 0;
-				}
-			buf[0] = 0;
-			}
-		return 1;
-		}
-
-
-	/* ret := required output buffer length */
-	field_len = (EC_GROUP_get_degree(group) + 7) / 8;
-	ret = (form == POINT_CONVERSION_COMPRESSED) ? 1 + field_len : 1 + 2*field_len;
-
-	/* if 'buf' is NULL, just return required length */
-	if (buf != NULL)
-		{
-		if (len < ret)
-			{
-			ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_BUFFER_TOO_SMALL);
-			goto err;
-			}
-
-		if (ctx == NULL)
-			{
-			ctx = new_ctx = BN_CTX_new();
-			if (ctx == NULL)
-				return 0;
-			}
-
-		BN_CTX_start(ctx);
-		used_ctx = 1;
-		x = BN_CTX_get(ctx);
-		y = BN_CTX_get(ctx);
-		yxi = BN_CTX_get(ctx);
-		if (yxi == NULL) goto err;
-
-		if (!EC_POINT_get_affine_coordinates_GF2m(group, point, x, y, ctx)) goto err;
-
-		buf[0] = form;
-		if ((form != POINT_CONVERSION_UNCOMPRESSED) && !BN_is_zero(x))
-			{
-			if (!group->meth->field_div(group, yxi, y, x, ctx)) goto err;
-			if (BN_is_odd(yxi)) buf[0]++;
-			}
-
-		i = 1;
-		
-		skip = field_len - BN_num_bytes(x);
-		if (skip > field_len)
-			{
-			ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
-			goto err;
-			}
-		while (skip > 0)
-			{
-			buf[i++] = 0;
-			skip--;
-			}
-		skip = BN_bn2bin(x, buf + i);
-		i += skip;
-		if (i != 1 + field_len)
-			{
-			ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
-			goto err;
-			}
-
-		if (form == POINT_CONVERSION_UNCOMPRESSED || form == POINT_CONVERSION_HYBRID)
-			{
-			skip = field_len - BN_num_bytes(y);
-			if (skip > field_len)
-				{
-				ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
-				goto err;
-				}
-			while (skip > 0)
-				{
-				buf[i++] = 0;
-				skip--;
-				}
-			skip = BN_bn2bin(y, buf + i);
-			i += skip;
-			}
-
-		if (i != ret)
-			{
-			ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
-			goto err;
-			}
-		}
-	
-	if (used_ctx)
-		BN_CTX_end(ctx);
-	if (new_ctx != NULL)
-		BN_CTX_free(new_ctx);
-	return ret;
-
- err:
-	if (used_ctx)
-		BN_CTX_end(ctx);
-	if (new_ctx != NULL)
-		BN_CTX_free(new_ctx);
-	return 0;
-	}
-
-
-/* Converts an octet string representation to an EC_POINT. 
- * Note that the simple implementation only uses affine coordinates.
- */
-int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
-	const unsigned char *buf, size_t len, BN_CTX *ctx)
-	{
-	point_conversion_form_t form;
-	int y_bit;
-	BN_CTX *new_ctx = NULL;
-	BIGNUM *x, *y, *yxi;
-	size_t field_len, enc_len;
-	int ret = 0;
-
-	if (len == 0)
-		{
-		ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_BUFFER_TOO_SMALL);
-		return 0;
-		}
-	form = buf[0];
-	y_bit = form & 1;
-	form = form & ~1U;
-	if ((form != 0)	&& (form != POINT_CONVERSION_COMPRESSED)
-		&& (form != POINT_CONVERSION_UNCOMPRESSED)
-		&& (form != POINT_CONVERSION_HYBRID))
-		{
-		ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
-		return 0;
-		}
-	if ((form == 0 || form == POINT_CONVERSION_UNCOMPRESSED) && y_bit)
-		{
-		ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
-		return 0;
-		}
-
-	if (form == 0)
-		{
-		if (len != 1)
-			{
-			ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
-			return 0;
-			}
-
-		return EC_POINT_set_to_infinity(group, point);
-		}
-	
-	field_len = (EC_GROUP_get_degree(group) + 7) / 8;
-	enc_len = (form == POINT_CONVERSION_COMPRESSED) ? 1 + field_len : 1 + 2*field_len;
-
-	if (len != enc_len)
-		{
-		ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
-		return 0;
-		}
-
-	if (ctx == NULL)
-		{
-		ctx = new_ctx = BN_CTX_new();
-		if (ctx == NULL)
-			return 0;
-		}
-
-	BN_CTX_start(ctx);
-	x = BN_CTX_get(ctx);
-	y = BN_CTX_get(ctx);
-	yxi = BN_CTX_get(ctx);
-	if (yxi == NULL) goto err;
-
-	if (!BN_bin2bn(buf + 1, field_len, x)) goto err;
-	if (BN_ucmp(x, &group->field) >= 0)
-		{
-		ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
-		goto err;
-		}
-
-	if (form == POINT_CONVERSION_COMPRESSED)
-		{
-		if (!EC_POINT_set_compressed_coordinates_GF2m(group, point, x, y_bit, ctx)) goto err;
-		}
-	else
-		{
-		if (!BN_bin2bn(buf + 1 + field_len, field_len, y)) goto err;
-		if (BN_ucmp(y, &group->field) >= 0)
-			{
-			ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
-			goto err;
-			}
-		if (form == POINT_CONVERSION_HYBRID)
-			{
-			if (!group->meth->field_div(group, yxi, y, x, ctx)) goto err;
-			if (y_bit != BN_is_odd(yxi))
-				{
-				ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
-				goto err;
-				}
-			}
-
-		if (!EC_POINT_set_affine_coordinates_GF2m(group, point, x, y, ctx)) goto err;
-		}
-	
-	if (!EC_POINT_is_on_curve(group, point, ctx)) /* test required by X9.62 */
-		{
-		ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_POINT_IS_NOT_ON_CURVE);
-		goto err;
-		}
-
-	ret = 1;
-	
- err:
-	BN_CTX_end(ctx);
-	if (new_ctx != NULL)
-		BN_CTX_free(new_ctx);
-	return ret;
-	}
-#endif