From 82b040aef9cef17610a89204220ee3cb1012fb20 Mon Sep 17 00:00:00 2001 From: tb <> Date: Tue, 25 Apr 2023 19:53:30 +0000 Subject: GF2m bites the dust. It won't be missed. --- src/lib/libcrypto/ec/ec2_oct.c | 402 ----------------------------------------- 1 file changed, 402 deletions(-) delete mode 100644 src/lib/libcrypto/ec/ec2_oct.c (limited to 'src/lib/libcrypto/ec/ec2_oct.c') diff --git a/src/lib/libcrypto/ec/ec2_oct.c b/src/lib/libcrypto/ec/ec2_oct.c deleted file mode 100644 index 6cb7259824..0000000000 --- a/src/lib/libcrypto/ec/ec2_oct.c +++ /dev/null @@ -1,402 +0,0 @@ -/* $OpenBSD: ec2_oct.c,v 1.20 2023/04/11 18:58:20 jsing Exp $ */ -/* ==================================================================== - * 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 - -#include - -#include "ec_local.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) -{ - BIGNUM *tmp, *x, *y, *z; - int z0; - int ret = 0; - - /* clear error queue */ - ERR_clear_error(); - - y_bit = (y_bit != 0) ? 1 : 0; - - BN_CTX_start(ctx); - - if ((tmp = BN_CTX_get(ctx)) == NULL) - goto err; - if ((x = BN_CTX_get(ctx)) == NULL) - goto err; - if ((y = BN_CTX_get(ctx)) == NULL) - goto err; - if ((z = BN_CTX_get(ctx)) == NULL) - goto err; - - if (!BN_GF2m_mod_arr(x, x_, group->poly)) - goto err; - if (BN_is_zero(x)) { - if (y_bit != 0) { - ECerror(EC_R_INVALID_COMPRESSED_POINT); - goto err; - } - 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(); - ECerror(EC_R_INVALID_COMPRESSED_POINT); - } else - ECerror(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(group, point, x, y, ctx)) - goto err; - - ret = 1; - - err: - BN_CTX_end(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) -{ - BIGNUM *x, *y, *yxi; - size_t field_len, i, skip; - size_t ret; - - if (form != POINT_CONVERSION_COMPRESSED && - form != POINT_CONVERSION_UNCOMPRESSED && - form != POINT_CONVERSION_HYBRID) { - ECerror(EC_R_INVALID_FORM); - return 0; - } - - if (EC_POINT_is_at_infinity(group, point) > 0) { - /* encodes to a single 0 octet */ - if (buf != NULL) { - if (len < 1) { - ECerror(EC_R_BUFFER_TOO_SMALL); - return 0; - } - buf[0] = 0; - } - return 1; - } - - BN_CTX_start(ctx); - - /* 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) { - ECerror(EC_R_BUFFER_TOO_SMALL); - goto err; - } - - if ((x = BN_CTX_get(ctx)) == NULL) - goto err; - if ((y = BN_CTX_get(ctx)) == NULL) - goto err; - if ((yxi = BN_CTX_get(ctx)) == NULL) - goto err; - - if (!EC_POINT_get_affine_coordinates(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) { - ECerror(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) { - ECerror(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) { - ECerror(ERR_R_INTERNAL_ERROR); - goto err; - } - while (skip > 0) { - buf[i++] = 0; - skip--; - } - skip = BN_bn2bin(y, buf + i); - i += skip; - } - if (i != ret) { - ECerror(ERR_R_INTERNAL_ERROR); - goto err; - } - } - - err: - BN_CTX_end(ctx); - - return ret; -} - -/* - * 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; - BIGNUM *x, *y, *yxi; - size_t field_len, enc_len; - int ret = 0; - - if (len == 0) { - ECerror(EC_R_BUFFER_TOO_SMALL); - return 0; - } - - /* - * The first octet is the point conversion octet PC, see X9.62, page 4 - * and section 4.4.2. It must be: - * 0x00 for the point at infinity - * 0x02 or 0x03 for compressed form - * 0x04 for uncompressed form - * 0x06 or 0x07 for hybrid form. - * For compressed or hybrid forms, we store the last bit of buf[0] as - * y_bit and clear it from buf[0] so as to obtain a POINT_CONVERSION_*. - * We error if buf[0] contains any but the above values. - */ - y_bit = buf[0] & 1; - form = buf[0] & ~1U; - - if (form != 0 && form != POINT_CONVERSION_COMPRESSED && - form != POINT_CONVERSION_UNCOMPRESSED && - form != POINT_CONVERSION_HYBRID) { - ECerror(EC_R_INVALID_ENCODING); - return 0; - } - if (form == 0 || form == POINT_CONVERSION_UNCOMPRESSED) { - if (y_bit != 0) { - ECerror(EC_R_INVALID_ENCODING); - return 0; - } - } - - /* The point at infinity is represented by a single zero octet. */ - if (form == 0) { - if (len != 1) { - ECerror(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) { - ECerror(EC_R_INVALID_ENCODING); - return 0; - } - - BN_CTX_start(ctx); - - if ((x = BN_CTX_get(ctx)) == NULL) - goto err; - if ((y = BN_CTX_get(ctx)) == NULL) - goto err; - if ((yxi = BN_CTX_get(ctx)) == NULL) - goto err; - - if (!BN_bin2bn(buf + 1, field_len, x)) - goto err; - if (BN_ucmp(x, &group->field) >= 0) { - ECerror(EC_R_INVALID_ENCODING); - goto err; - } - if (form == POINT_CONVERSION_COMPRESSED) { - /* - * EC_POINT_set_compressed_coordinates checks that the - * point is on the curve as required by X9.62. - */ - if (!EC_POINT_set_compressed_coordinates(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) { - ECerror(EC_R_INVALID_ENCODING); - goto err; - } - if (form == POINT_CONVERSION_HYBRID) { - /* - * Check that the form in the encoding was set - * correctly according to X9.62 4.4.2.a, 4(c), - * see also first paragraph of X9.62 4.4.1.b. - */ - if (BN_is_zero(x)) { - if (y_bit != 0) { - ECerror(EC_R_INVALID_ENCODING); - goto err; - } - } else { - if (!group->meth->field_div(group, yxi, y, x, - ctx)) - goto err; - if (y_bit != BN_is_odd(yxi)) { - ECerror(EC_R_INVALID_ENCODING); - goto err; - } - } - } - /* - * EC_POINT_set_affine_coordinates checks that the - * point is on the curve as required by X9.62. - */ - if (!EC_POINT_set_affine_coordinates(group, point, x, y, ctx)) - goto err; - } - - ret = 1; - - err: - BN_CTX_end(ctx); - - return ret; -} -#endif -- cgit v1.2.3-55-g6feb