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/*
* Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/evp.h>
#include <openssl/ec.h>
#include <openssl/bn.h>
#ifndef OPENSSL_NO_STDIO
int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off)
{
BIO *b;
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
ECerr(EC_F_ECPKPARAMETERS_PRINT_FP, ERR_R_BUF_LIB);
return 0;
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = ECPKParameters_print(b, x, off);
BIO_free(b);
return ret;
}
int EC_KEY_print_fp(FILE *fp, const EC_KEY *x, int off)
{
BIO *b;
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
ECerr(EC_F_EC_KEY_PRINT_FP, ERR_R_BIO_LIB);
return 0;
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = EC_KEY_print(b, x, off);
BIO_free(b);
return ret;
}
int ECParameters_print_fp(FILE *fp, const EC_KEY *x)
{
BIO *b;
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
ECerr(EC_F_ECPARAMETERS_PRINT_FP, ERR_R_BIO_LIB);
return 0;
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = ECParameters_print(b, x);
BIO_free(b);
return ret;
}
#endif
static int print_bin(BIO *fp, const char *str, const unsigned char *num,
size_t len, int off);
int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
{
int ret = 0, reason = ERR_R_BIO_LIB;
BN_CTX *ctx = NULL;
const EC_POINT *point = NULL;
BIGNUM *p = NULL, *a = NULL, *b = NULL, *gen = NULL;
const BIGNUM *order = NULL, *cofactor = NULL;
const unsigned char *seed;
size_t seed_len = 0;
static const char *gen_compressed = "Generator (compressed):";
static const char *gen_uncompressed = "Generator (uncompressed):";
static const char *gen_hybrid = "Generator (hybrid):";
if (!x) {
reason = ERR_R_PASSED_NULL_PARAMETER;
goto err;
}
ctx = BN_CTX_new();
if (ctx == NULL) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
if (EC_GROUP_get_asn1_flag(x)) {
/* the curve parameter are given by an asn1 OID */
int nid;
const char *nname;
if (!BIO_indent(bp, off, 128))
goto err;
nid = EC_GROUP_get_curve_name(x);
if (nid == 0)
goto err;
if (BIO_printf(bp, "ASN1 OID: %s", OBJ_nid2sn(nid)) <= 0)
goto err;
if (BIO_printf(bp, "\n") <= 0)
goto err;
nname = EC_curve_nid2nist(nid);
if (nname) {
if (!BIO_indent(bp, off, 128))
goto err;
if (BIO_printf(bp, "NIST CURVE: %s\n", nname) <= 0)
goto err;
}
} else {
/* explicit parameters */
int is_char_two = 0;
point_conversion_form_t form;
int tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(x));
if (tmp_nid == NID_X9_62_characteristic_two_field)
is_char_two = 1;
if ((p = BN_new()) == NULL || (a = BN_new()) == NULL ||
(b = BN_new()) == NULL) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
if (!EC_GROUP_get_curve(x, p, a, b, ctx)) {
reason = ERR_R_EC_LIB;
goto err;
}
if ((point = EC_GROUP_get0_generator(x)) == NULL) {
reason = ERR_R_EC_LIB;
goto err;
}
order = EC_GROUP_get0_order(x);
cofactor = EC_GROUP_get0_cofactor(x);
if (order == NULL) {
reason = ERR_R_EC_LIB;
goto err;
}
form = EC_GROUP_get_point_conversion_form(x);
if ((gen = EC_POINT_point2bn(x, point, form, NULL, ctx)) == NULL) {
reason = ERR_R_EC_LIB;
goto err;
}
if ((seed = EC_GROUP_get0_seed(x)) != NULL)
seed_len = EC_GROUP_get_seed_len(x);
if (!BIO_indent(bp, off, 128))
goto err;
/* print the 'short name' of the field type */
if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
<= 0)
goto err;
if (is_char_two) {
/* print the 'short name' of the base type OID */
int basis_type = EC_GROUP_get_basis_type(x);
if (basis_type == 0)
goto err;
if (!BIO_indent(bp, off, 128))
goto err;
if (BIO_printf(bp, "Basis Type: %s\n",
OBJ_nid2sn(basis_type)) <= 0)
goto err;
/* print the polynomial */
if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, NULL,
off))
goto err;
} else {
if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, NULL, off))
goto err;
}
if ((a != NULL) && !ASN1_bn_print(bp, "A: ", a, NULL, off))
goto err;
if ((b != NULL) && !ASN1_bn_print(bp, "B: ", b, NULL, off))
goto err;
if (form == POINT_CONVERSION_COMPRESSED) {
if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
NULL, off))
goto err;
} else if (form == POINT_CONVERSION_UNCOMPRESSED) {
if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
NULL, off))
goto err;
} else { /* form == POINT_CONVERSION_HYBRID */
if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
NULL, off))
goto err;
}
if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
NULL, off))
goto err;
if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
NULL, off))
goto err;
if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
goto err;
}
ret = 1;
err:
if (!ret)
ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
BN_free(p);
BN_free(a);
BN_free(b);
BN_free(gen);
BN_CTX_free(ctx);
return ret;
}
static int print_bin(BIO *fp, const char *name, const unsigned char *buf,
size_t len, int off)
{
size_t i;
char str[128 + 1 + 4];
if (buf == NULL)
return 1;
if (off > 0) {
if (off > 128)
off = 128;
memset(str, ' ', off);
if (BIO_write(fp, str, off) <= 0)
return 0;
} else {
off = 0;
}
if (BIO_printf(fp, "%s", name) <= 0)
return 0;
for (i = 0; i < len; i++) {
if ((i % 15) == 0) {
str[0] = '\n';
memset(&(str[1]), ' ', off + 4);
if (BIO_write(fp, str, off + 1 + 4) <= 0)
return 0;
}
if (BIO_printf(fp, "%02x%s", buf[i], ((i + 1) == len) ? "" : ":") <=
0)
return 0;
}
if (BIO_write(fp, "\n", 1) <= 0)
return 0;
return 1;
}
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