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/* curves.c - ECC curves regression tests
* Copyright (C) 2011 Free Software Foundation, Inc.
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "../src/gcrypt-int.h"
/* Number of curves defined in ../cipger/ecc.c */
#define N_CURVES 22
/* A real world sample public key. */
static char const sample_key_1[] =
"(public-key\n"
" (ecdsa\n"
" (p #00FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF#)\n"
" (a #00FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC#)\n"
" (b #5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B#)\n"
" (g #046B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296"
"4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5#)\n"
" (n #00FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551#)\n"
" (h #000000000000000000000000000000000000000000000000000000000000000001#)\n"
" (q #0442B927242237639A36CE9221B340DB1A9AB76DF2FE3E171277F6A4023DED146EE"
"86525E38CCECFF3FB8D152CC6334F70D23A525175C1BCBDDE6E023B2228770E#)\n"
" ))";
static char const sample_key_1_curve[] = "NIST P-256";
static unsigned int sample_key_1_nbits = 256;
/* A made up sample public key. */
static char const sample_key_2[] =
"(public-key\n"
" (ecdh\n"
" (p #00e95e4a5f737059dc60dfc7ad95b3d8139515620f#)\n"
" (a #340e7be2a280eb74e2be61bada745d97e8f7c300#)\n"
" (b #1e589a8595423412134faa2dbdec95c8d8675e58#)\n"
" (g #04bed5af16ea3f6a4f62938c4631eb5af7bdbcdbc3"
"1667cb477a1a8ec338f94741669c976316da6321#)\n"
" (n #00e95e4a5f737059dc60df5991d45029409e60fc09#)\n"
" (h #000000000000000000000000000000000000000000000000000000000000000001#)\n"
" (q #041111111111111111111111111111111111111111"
"2222222222222222222222222222222222222222#)\n"
" ))";
static char const sample_key_2_curve[] = "brainpoolP160r1";
static unsigned int sample_key_2_nbits = 160;
/* Program option flags. */
static int verbose;
static int error_count;
static void
fail (const char *format, ...)
{
va_list arg_ptr;
va_start (arg_ptr, format);
vfprintf (stderr, format, arg_ptr);
va_end (arg_ptr);
error_count++;
}
static void
die (const char *format, ...)
{
va_list arg_ptr;
va_start (arg_ptr, format);
vfprintf (stderr, format, arg_ptr);
va_end (arg_ptr);
exit (1);
}
static void
list_curves (void)
{
int idx;
const char *name;
unsigned int nbits;
for (idx=0; (name = gcry_pk_get_curve (NULL, idx, &nbits)); idx++)
{
if (verbose)
printf ("%s - %u bits\n", name, nbits);
}
if (idx != N_CURVES)
fail ("expected %d curves but got %d\n", N_CURVES, idx);
if (gcry_pk_get_curve (NULL, -1, NULL))
fail ("curve iteration failed\n");
}
static void
check_matching (void)
{
gpg_error_t err;
gcry_sexp_t key;
const char *name;
unsigned int nbits;
err = gcry_sexp_new (&key, sample_key_1, 0, 1);
if (err)
die ("parsing s-expression string failed: %s\n", gpg_strerror (err));
name = gcry_pk_get_curve (key, 0, &nbits);
if (!name)
fail ("curve name not found for sample_key_1\n");
else if (strcmp (name, sample_key_1_curve))
fail ("expected curve name %s but got %s for sample_key_1\n",
sample_key_1_curve, name);
else if (nbits != sample_key_1_nbits)
fail ("expected curve size %u but got %u for sample_key_1\n",
sample_key_1_nbits, nbits);
gcry_sexp_release (key);
err = gcry_sexp_new (&key, sample_key_2, 0, 1);
if (err)
die ("parsing s-expression string failed: %s\n", gpg_strerror (err));
name = gcry_pk_get_curve (key, 0, &nbits);
if (!name)
fail ("curve name not found for sample_key_2\n");
else if (strcmp (name, sample_key_2_curve))
fail ("expected curve name %s but got %s for sample_key_2\n",
sample_key_2_curve, name);
else if (nbits != sample_key_2_nbits)
fail ("expected curve size %u but got %u for sample_key_2\n",
sample_key_2_nbits, nbits);
gcry_sexp_release (key);
}
static void
check_get_params (void)
{
gcry_sexp_t param;
const char *name;
param = gcry_pk_get_param (GCRY_PK_ECDSA, sample_key_1_curve);
if (!param)
fail ("error gerring parameters for `%s'\n", sample_key_1_curve);
name = gcry_pk_get_curve (param, 0, NULL);
if (!name)
fail ("get_param: curve name not found for sample_key_1\n");
else if (strcmp (name, sample_key_1_curve))
fail ("get_param: expected curve name %s but got %s for sample_key_1\n",
sample_key_1_curve, name);
gcry_sexp_release (param);
/* Brainpool curves are not supported in fips mode */
if (gcry_fips_mode_active())
return;
param = gcry_pk_get_param (GCRY_PK_ECDSA, sample_key_2_curve);
if (!param)
fail ("error gerring parameters for `%s'\n", sample_key_2_curve);
name = gcry_pk_get_curve (param, 0, NULL);
if (!name)
fail ("get_param: curve name not found for sample_key_2\n");
else if (strcmp (name, sample_key_2_curve))
fail ("get_param: expected curve name %s but got %s for sample_key_2\n",
sample_key_2_curve, name);
gcry_sexp_release (param);
}
int
main (int argc, char **argv)
{
int debug = 0;
if (argc > 1 && !strcmp (argv[1], "--verbose"))
verbose = 1;
else if (argc > 1 && !strcmp (argv[1], "--debug"))
verbose = debug = 1;
if (!gcry_check_version (GCRYPT_VERSION))
die ("version mismatch\n");
gcry_control (GCRYCTL_DISABLE_SECMEM, 0);
gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
if (debug)
gcry_control (GCRYCTL_SET_DEBUG_FLAGS, 1u, 0);
list_curves ();
check_matching ();
check_get_params ();
return error_count ? 1 : 0;
}
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