378 lines
12 KiB
C
378 lines
12 KiB
C
/* crypto/ec/eck_prn.c */
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/*
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* Written by Nils Larsch for the OpenSSL project.
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*/
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/* ====================================================================
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* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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/* ====================================================================
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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* Portions originally developed by SUN MICROSYSTEMS, INC., and
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* contributed to the OpenSSL project.
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/evp.h>
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#include <openssl/ec.h>
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#include <openssl/bn.h>
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#ifndef OPENSSL_NO_FP_API
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int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off)
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{
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BIO *b;
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int ret;
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if ((b = BIO_new(BIO_s_file())) == NULL) {
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ECerr(EC_F_ECPKPARAMETERS_PRINT_FP, ERR_R_BUF_LIB);
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return (0);
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}
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BIO_set_fp(b, fp, BIO_NOCLOSE);
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ret = ECPKParameters_print(b, x, off);
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BIO_free(b);
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return (ret);
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}
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int EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off)
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{
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BIO *b;
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int ret;
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if ((b = BIO_new(BIO_s_file())) == NULL) {
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ECerr(EC_F_EC_KEY_PRINT_FP, ERR_R_BIO_LIB);
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return (0);
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}
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BIO_set_fp(b, fp, BIO_NOCLOSE);
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ret = EC_KEY_print(b, x, off);
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BIO_free(b);
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return (ret);
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}
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int ECParameters_print_fp(FILE *fp, const EC_KEY *x)
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{
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BIO *b;
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int ret;
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if ((b = BIO_new(BIO_s_file())) == NULL) {
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ECerr(EC_F_ECPARAMETERS_PRINT_FP, ERR_R_BIO_LIB);
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return (0);
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}
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BIO_set_fp(b, fp, BIO_NOCLOSE);
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ret = ECParameters_print(b, x);
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BIO_free(b);
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return (ret);
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}
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#endif
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int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
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{
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EVP_PKEY *pk;
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int ret;
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pk = EVP_PKEY_new();
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if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
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return 0;
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ret = EVP_PKEY_print_private(bp, pk, off, NULL);
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EVP_PKEY_free(pk);
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return ret;
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}
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int ECParameters_print(BIO *bp, const EC_KEY *x)
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{
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EVP_PKEY *pk;
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int ret;
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pk = EVP_PKEY_new();
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if (!pk || !EVP_PKEY_set1_EC_KEY(pk, (EC_KEY *)x))
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return 0;
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ret = EVP_PKEY_print_params(bp, pk, 4, NULL);
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EVP_PKEY_free(pk);
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return ret;
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}
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static int print_bin(BIO *fp, const char *str, const unsigned char *num,
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size_t len, int off);
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int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
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{
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unsigned char *buffer = NULL;
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size_t buf_len = 0, i;
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int ret = 0, reason = ERR_R_BIO_LIB;
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BN_CTX *ctx = NULL;
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const EC_POINT *point = NULL;
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BIGNUM *p = NULL, *a = NULL, *b = NULL, *gen = NULL,
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*order = NULL, *cofactor = NULL;
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const unsigned char *seed;
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size_t seed_len = 0;
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static const char *gen_compressed = "Generator (compressed):";
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static const char *gen_uncompressed = "Generator (uncompressed):";
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static const char *gen_hybrid = "Generator (hybrid):";
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if (!x) {
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reason = ERR_R_PASSED_NULL_PARAMETER;
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goto err;
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}
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ctx = BN_CTX_new();
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if (ctx == NULL) {
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reason = ERR_R_MALLOC_FAILURE;
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goto err;
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}
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if (EC_GROUP_get_asn1_flag(x)) {
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/* the curve parameter are given by an asn1 OID */
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int nid;
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const char *nname;
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if (!BIO_indent(bp, off, 128))
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goto err;
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nid = EC_GROUP_get_curve_name(x);
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if (nid == 0)
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goto err;
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if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
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goto err;
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if (BIO_printf(bp, "\n") <= 0)
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goto err;
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nname = EC_curve_nid2nist(nid);
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if (nname) {
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if (!BIO_indent(bp, off, 128))
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goto err;
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if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
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goto err;
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}
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} else {
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/* explicit parameters */
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int is_char_two = 0;
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point_conversion_form_t form;
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int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));
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if (tmp_nid == NID_X9_62_characteristic_two_field)
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is_char_two = 1;
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if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
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(b = BN_new()) == NULL || (order = BN_new()) == NULL ||
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(cofactor = BN_new()) == NULL) {
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reason = ERR_R_MALLOC_FAILURE;
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goto err;
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}
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#ifndef OPENSSL_NO_EC2M
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if (is_char_two) {
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if (!EC_GROUP_get_curve_GF2m(x, p, a, b, ctx)) {
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reason = ERR_R_EC_LIB;
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goto err;
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}
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} else /* prime field */
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#endif
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{
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if (!EC_GROUP_get_curve_GFp(x, p, a, b, ctx)) {
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reason = ERR_R_EC_LIB;
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goto err;
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}
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}
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if ((point = EC_GROUP_get0_generator(x)) == NULL) {
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reason = ERR_R_EC_LIB;
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goto err;
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}
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if (!EC_GROUP_get_order(x, order, NULL) ||
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!EC_GROUP_get_cofactor(x, cofactor, NULL)) {
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reason = ERR_R_EC_LIB;
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goto err;
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}
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form = EC_GROUP_get_point_conversion_form(x);
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if ((gen = EC_POINT_point2bn(x, point, form, NULL, ctx)) == NULL) {
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reason = ERR_R_EC_LIB;
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goto err;
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}
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buf_len = (size_t)BN_num_bytes(p);
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if (buf_len < (i = (size_t)BN_num_bytes(a)))
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buf_len = i;
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if (buf_len < (i = (size_t)BN_num_bytes(b)))
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buf_len = i;
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if (buf_len < (i = (size_t)BN_num_bytes(gen)))
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buf_len = i;
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if (buf_len < (i = (size_t)BN_num_bytes(order)))
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buf_len = i;
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if (buf_len < (i = (size_t)BN_num_bytes(cofactor)))
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buf_len = i;
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if ((seed = EC_GROUP_get0_seed(x)) != NULL)
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seed_len = EC_GROUP_get_seed_len(x);
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buf_len += 10;
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if ((buffer = OPENSSL_malloc(buf_len)) == NULL) {
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reason = ERR_R_MALLOC_FAILURE;
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goto err;
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}
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if (!BIO_indent(bp, off, 128))
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goto err;
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/* print the 'short name' of the field type */
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if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
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<= 0)
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goto err;
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if (is_char_two) {
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/* print the 'short name' of the base type OID */
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int basis_type = EC_GROUP_get_basis_type(x);
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if (basis_type == 0)
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goto err;
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if (!BIO_indent(bp, off, 128))
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goto err;
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if (BIO_printf(bp, "Basis Type: %s\n",
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OBJ_nid2sn(basis_type)) <= 0)
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goto err;
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/* print the polynomial */
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if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
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off))
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goto err;
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} else {
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if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer, off))
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goto err;
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}
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if ((a != NULL) && !ASN1_bn_print(bp, "A: ", a, buffer, off))
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goto err;
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if ((b != NULL) && !ASN1_bn_print(bp, "B: ", b, buffer, off))
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goto err;
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if (form == POINT_CONVERSION_COMPRESSED) {
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if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
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buffer, off))
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goto err;
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} else if (form == POINT_CONVERSION_UNCOMPRESSED) {
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if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
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buffer, off))
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goto err;
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} else { /* form == POINT_CONVERSION_HYBRID */
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if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
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buffer, off))
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goto err;
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}
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if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
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buffer, off))
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goto err;
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if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
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buffer, off))
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goto err;
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if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
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goto err;
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}
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ret = 1;
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err:
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if (!ret)
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ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
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if (p)
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BN_free(p);
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if (a)
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BN_free(a);
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if (b)
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BN_free(b);
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if (gen)
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BN_free(gen);
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if (order)
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BN_free(order);
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if (cofactor)
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BN_free(cofactor);
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if (ctx)
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BN_CTX_free(ctx);
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if (buffer != NULL)
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OPENSSL_free(buffer);
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return (ret);
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}
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static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
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size_t len, int off)
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{
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size_t i;
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char str[128 + 1 + 4];
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if (buf == NULL)
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return 1;
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if (off > 0) {
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if (off > 128)
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off = 128;
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memset(str, ' ', off);
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if (BIO_write(fp, str, off) <= 0)
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return 0;
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} else {
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off = 0;
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}
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if (BIO_printf(fp, "%s", name) <= 0)
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return 0;
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for (i = 0; i < len; i++) {
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if ((i % 15) == 0) {
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str[0] = '\n';
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memset(&(str[1]), ' ', off + 4);
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if (BIO_write(fp, str, off + 1 + 4) <= 0)
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return 0;
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}
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if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <=
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0)
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return 0;
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}
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if (BIO_write(fp, "\n", 1) <= 0)
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return 0;
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return 1;
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}
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