mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-12-27 20:05:33 +00:00
1e14827beb
As a result, the copyright of contributors other than Arm is now
acknowledged, and the years of publishing are no longer tracked in the
source files.
Also remove the now-redundant lines declaring that the files are part of
MbedTLS.
This commit was generated using the following script:
# ========================
#!/bin/sh
# Find files
find '(' -path './.git' -o -path './3rdparty' ')' -prune -o -type f -print | xargs sed -bi '
# Replace copyright attribution line
s/Copyright.*Arm.*/Copyright The Mbed TLS Contributors/I
# Remove redundant declaration and the preceding line
$!N
/This file is part of Mbed TLS/Id
P
D
'
# ========================
Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
253 lines
6.9 KiB
C
253 lines
6.9 KiB
C
/*
|
|
* Example ECDSA program
|
|
*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#if !defined(MBEDTLS_CONFIG_FILE)
|
|
#include "mbedtls/config.h"
|
|
#else
|
|
#include MBEDTLS_CONFIG_FILE
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_PLATFORM_C)
|
|
#include "mbedtls/platform.h"
|
|
#else
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#define mbedtls_printf printf
|
|
#define mbedtls_exit exit
|
|
#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
|
|
#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
|
|
#endif /* MBEDTLS_PLATFORM_C */
|
|
|
|
#if defined(MBEDTLS_ECDSA_C) && \
|
|
defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_CTR_DRBG_C)
|
|
#include "mbedtls/entropy.h"
|
|
#include "mbedtls/ctr_drbg.h"
|
|
#include "mbedtls/ecdsa.h"
|
|
#include "mbedtls/sha256.h"
|
|
|
|
#include <string.h>
|
|
#endif
|
|
|
|
/*
|
|
* Uncomment to show key and signature details
|
|
*/
|
|
#define VERBOSE
|
|
|
|
/*
|
|
* Uncomment to force use of a specific curve
|
|
*/
|
|
#define ECPARAMS MBEDTLS_ECP_DP_SECP192R1
|
|
|
|
#if !defined(ECPARAMS)
|
|
#define ECPARAMS mbedtls_ecp_curve_list()->grp_id
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_ECDSA_C) || !defined(MBEDTLS_SHA256_C) || \
|
|
!defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C)
|
|
int main( void )
|
|
{
|
|
mbedtls_printf("MBEDTLS_ECDSA_C and/or MBEDTLS_SHA256_C and/or "
|
|
"MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C not defined\n");
|
|
mbedtls_exit( 0 );
|
|
}
|
|
#else
|
|
#if defined(VERBOSE)
|
|
static void dump_buf( const char *title, unsigned char *buf, size_t len )
|
|
{
|
|
size_t i;
|
|
|
|
mbedtls_printf( "%s", title );
|
|
for( i = 0; i < len; i++ )
|
|
mbedtls_printf("%c%c", "0123456789ABCDEF" [buf[i] / 16],
|
|
"0123456789ABCDEF" [buf[i] % 16] );
|
|
mbedtls_printf( "\n" );
|
|
}
|
|
|
|
static void dump_pubkey( const char *title, mbedtls_ecdsa_context *key )
|
|
{
|
|
unsigned char buf[300];
|
|
size_t len;
|
|
|
|
if( mbedtls_ecp_point_write_binary( &key->grp, &key->Q,
|
|
MBEDTLS_ECP_PF_UNCOMPRESSED, &len, buf, sizeof buf ) != 0 )
|
|
{
|
|
mbedtls_printf("internal error\n");
|
|
return;
|
|
}
|
|
|
|
dump_buf( title, buf, len );
|
|
}
|
|
#else
|
|
#define dump_buf( a, b, c )
|
|
#define dump_pubkey( a, b )
|
|
#endif
|
|
|
|
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
int ret = 1;
|
|
int exit_code = MBEDTLS_EXIT_FAILURE;
|
|
mbedtls_ecdsa_context ctx_sign, ctx_verify;
|
|
mbedtls_entropy_context entropy;
|
|
mbedtls_ctr_drbg_context ctr_drbg;
|
|
unsigned char message[100];
|
|
unsigned char hash[32];
|
|
unsigned char sig[MBEDTLS_ECDSA_MAX_LEN];
|
|
size_t sig_len;
|
|
const char *pers = "ecdsa";
|
|
((void) argv);
|
|
|
|
mbedtls_ecdsa_init( &ctx_sign );
|
|
mbedtls_ecdsa_init( &ctx_verify );
|
|
mbedtls_ctr_drbg_init( &ctr_drbg );
|
|
|
|
memset( sig, 0, sizeof( sig ) );
|
|
memset( message, 0x25, sizeof( message ) );
|
|
|
|
if( argc != 1 )
|
|
{
|
|
mbedtls_printf( "usage: ecdsa\n" );
|
|
|
|
#if defined(_WIN32)
|
|
mbedtls_printf( "\n" );
|
|
#endif
|
|
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* Generate a key pair for signing
|
|
*/
|
|
mbedtls_printf( "\n . Seeding the random number generator..." );
|
|
fflush( stdout );
|
|
|
|
mbedtls_entropy_init( &entropy );
|
|
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
|
|
(const unsigned char *) pers,
|
|
strlen( pers ) ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf( " ok\n . Generating key pair..." );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = mbedtls_ecdsa_genkey( &ctx_sign, ECPARAMS,
|
|
mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_ecdsa_genkey returned %d\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf( " ok (key size: %d bits)\n", (int) ctx_sign.grp.pbits );
|
|
|
|
dump_pubkey( " + Public key: ", &ctx_sign );
|
|
|
|
/*
|
|
* Compute message hash
|
|
*/
|
|
mbedtls_printf( " . Computing message hash..." );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = mbedtls_sha256_ret( message, sizeof( message ), hash, 0 ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_sha256_ret returned %d\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf( " ok\n" );
|
|
|
|
dump_buf( " + Hash: ", hash, sizeof( hash ) );
|
|
|
|
/*
|
|
* Sign message hash
|
|
*/
|
|
mbedtls_printf( " . Signing message hash..." );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = mbedtls_ecdsa_write_signature( &ctx_sign, MBEDTLS_MD_SHA256,
|
|
hash, sizeof( hash ),
|
|
sig, &sig_len,
|
|
mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_ecdsa_write_signature returned %d\n", ret );
|
|
goto exit;
|
|
}
|
|
mbedtls_printf( " ok (signature length = %u)\n", (unsigned int) sig_len );
|
|
|
|
dump_buf( " + Signature: ", sig, sig_len );
|
|
|
|
/*
|
|
* Transfer public information to verifying context
|
|
*
|
|
* We could use the same context for verification and signatures, but we
|
|
* chose to use a new one in order to make it clear that the verifying
|
|
* context only needs the public key (Q), and not the private key (d).
|
|
*/
|
|
mbedtls_printf( " . Preparing verification context..." );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = mbedtls_ecp_group_copy( &ctx_verify.grp, &ctx_sign.grp ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_ecp_group_copy returned %d\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
if( ( ret = mbedtls_ecp_copy( &ctx_verify.Q, &ctx_sign.Q ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_ecp_copy returned %d\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* Verify signature
|
|
*/
|
|
mbedtls_printf( " ok\n . Verifying signature..." );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = mbedtls_ecdsa_read_signature( &ctx_verify,
|
|
hash, sizeof( hash ),
|
|
sig, sig_len ) ) != 0 )
|
|
{
|
|
mbedtls_printf( " failed\n ! mbedtls_ecdsa_read_signature returned %d\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf( " ok\n" );
|
|
|
|
exit_code = MBEDTLS_EXIT_SUCCESS;
|
|
|
|
exit:
|
|
|
|
#if defined(_WIN32)
|
|
mbedtls_printf( " + Press Enter to exit this program.\n" );
|
|
fflush( stdout ); getchar();
|
|
#endif
|
|
|
|
mbedtls_ecdsa_free( &ctx_verify );
|
|
mbedtls_ecdsa_free( &ctx_sign );
|
|
mbedtls_ctr_drbg_free( &ctr_drbg );
|
|
mbedtls_entropy_free( &entropy );
|
|
|
|
mbedtls_exit( exit_code );
|
|
}
|
|
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
|
|
ECPARAMS */
|