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259 lines
7.3 KiB
C
259 lines
7.3 KiB
C
/*
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* Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/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_STDIO
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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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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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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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const BIGNUM *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) {
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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_curve(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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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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order = EC_GROUP_get0_order(x);
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cofactor = EC_GROUP_get0_cofactor(x);
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if (order == 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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if ((seed = EC_GROUP_get0_seed(x)) != NULL)
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seed_len = EC_GROUP_get_seed_len(x);
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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, NULL,
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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, NULL, off))
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goto err;
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}
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if ((a != NULL) && !ASN1_bn_print(bp, "A: ", a, NULL, off))
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goto err;
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if ((b != NULL) && !ASN1_bn_print(bp, "B: ", b, NULL, 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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NULL, 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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NULL, 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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NULL, 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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NULL, off))
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goto err;
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if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
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NULL, 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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BN_free(p);
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BN_free(a);
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BN_free(b);
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BN_free(gen);
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BN_CTX_free(ctx);
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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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