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mbedtls/programs/pkey/key_app.c

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/*
* Key reading application
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* 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.
*
* This file is part of mbed TLS (https://tls.mbed.org)
*/
#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>
#define mbedtls_printf printf
#endif
#if defined(MBEDTLS_BIGNUM_C) && \
defined(MBEDTLS_PK_PARSE_C) && defined(MBEDTLS_FS_IO)
#include "mbedtls/error.h"
#include "mbedtls/rsa.h"
#include "mbedtls/x509.h"
#include <string.h>
#endif
#define MODE_NONE 0
#define MODE_PRIVATE 1
#define MODE_PUBLIC 2
#define DFL_MODE MODE_NONE
#define DFL_FILENAME "keyfile.key"
#define DFL_PASSWORD ""
#define DFL_PASSWORD_FILE ""
#define DFL_DEBUG_LEVEL 0
#define USAGE \
"\n usage: key_app param=<>...\n" \
"\n acceptable parameters:\n" \
" mode=private|public default: none\n" \
" filename=%%s default: keyfile.key\n" \
" password=%%s default: \"\"\n" \
" password_file=%%s default: \"\"\n" \
"\n"
#if !defined(MBEDTLS_BIGNUM_C) || \
!defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_FS_IO)
int main( void )
{
mbedtls_printf("MBEDTLS_BIGNUM_C and/or "
"MBEDTLS_PK_PARSE_C and/or MBEDTLS_FS_IO not defined.\n");
return( 0 );
}
#else
/*
* global options
*/
struct options
{
int mode; /* the mode to run the application in */
const char *filename; /* filename of the key file */
const char *password; /* password for the private key */
const char *password_file; /* password_file for the private key */
} opt;
int main( int argc, char *argv[] )
{
int ret = 0;
char buf[1024];
int i;
char *p, *q;
mbedtls_pk_context pk;
mbedtls_mpi N, P, Q, D, E, DP, DQ, QP;
/*
* Set to sane values
*/
mbedtls_pk_init( &pk );
memset( buf, 0, sizeof(buf) );
mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P ); mbedtls_mpi_init( &Q );
mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP );
mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
if( argc == 0 )
{
usage:
mbedtls_printf( USAGE );
goto exit;
}
opt.mode = DFL_MODE;
opt.filename = DFL_FILENAME;
opt.password = DFL_PASSWORD;
opt.password_file = DFL_PASSWORD_FILE;
for( i = 1; i < argc; i++ )
{
p = argv[i];
if( ( q = strchr( p, '=' ) ) == NULL )
goto usage;
*q++ = '\0';
if( strcmp( p, "mode" ) == 0 )
{
if( strcmp( q, "private" ) == 0 )
opt.mode = MODE_PRIVATE;
else if( strcmp( q, "public" ) == 0 )
opt.mode = MODE_PUBLIC;
else
goto usage;
}
else if( strcmp( p, "filename" ) == 0 )
opt.filename = q;
else if( strcmp( p, "password" ) == 0 )
opt.password = q;
else if( strcmp( p, "password_file" ) == 0 )
opt.password_file = q;
else
goto usage;
}
if( opt.mode == MODE_PRIVATE )
{
if( strlen( opt.password ) && strlen( opt.password_file ) )
{
mbedtls_printf( "Error: cannot have both password and password_file\n" );
goto usage;
}
if( strlen( opt.password_file ) )
{
FILE *f;
mbedtls_printf( "\n . Loading the password file ..." );
if( ( f = fopen( opt.password_file, "rb" ) ) == NULL )
{
mbedtls_printf( " failed\n ! fopen returned NULL\n" );
goto exit;
}
if( fgets( buf, sizeof(buf), f ) == NULL )
{
fclose( f );
mbedtls_printf( "Error: fgets() failed to retrieve password\n" );
goto exit;
}
fclose( f );
i = (int) strlen( buf );
if( buf[i - 1] == '\n' ) buf[i - 1] = '\0';
if( buf[i - 2] == '\r' ) buf[i - 2] = '\0';
opt.password = buf;
}
/*
* 1.1. Load the key
*/
mbedtls_printf( "\n . Loading the private key ..." );
fflush( stdout );
ret = mbedtls_pk_parse_keyfile( &pk, opt.filename, opt.password );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile returned -0x%04x\n", -ret );
goto exit;
}
mbedtls_printf( " ok\n" );
/*
* 1.2 Print the key
*/
mbedtls_printf( " . Key information ...\n" );
#if defined(MBEDTLS_RSA_C)
if( mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_RSA )
{
mbedtls_rsa_context *rsa = mbedtls_pk_rsa( pk );
if( ( ret = mbedtls_rsa_export ( rsa, &N, &P, &Q, &D, &E ) ) != 0 ||
( ret = mbedtls_rsa_export_crt( rsa, &DP, &DQ, &QP ) ) != 0 )
{
mbedtls_printf( " failed\n ! could not export RSA parameters\n\n" );
goto exit;
}
mbedtls_mpi_write_file( "N: ", &N, 16, NULL );
mbedtls_mpi_write_file( "E: ", &E, 16, NULL );
mbedtls_mpi_write_file( "D: ", &D, 16, NULL );
mbedtls_mpi_write_file( "P: ", &P, 16, NULL );
mbedtls_mpi_write_file( "Q: ", &Q, 16, NULL );
mbedtls_mpi_write_file( "DP: ", &DP, 16, NULL );
mbedtls_mpi_write_file( "DQ: ", &DQ, 16, NULL );
mbedtls_mpi_write_file( "QP: ", &QP, 16, NULL );
}
else
#endif
#if defined(MBEDTLS_ECP_C)
if( mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_ECKEY )
{
mbedtls_ecp_keypair *ecp = mbedtls_pk_ec( pk );
mbedtls_mpi_write_file( "Q(X): ", &ecp->Q.X, 16, NULL );
mbedtls_mpi_write_file( "Q(Y): ", &ecp->Q.Y, 16, NULL );
mbedtls_mpi_write_file( "Q(Z): ", &ecp->Q.Z, 16, NULL );
mbedtls_mpi_write_file( "D : ", &ecp->d , 16, NULL );
}
else
#endif
{
mbedtls_printf("Do not know how to print key information for this type\n" );
goto exit;
}
}
else if( opt.mode == MODE_PUBLIC )
{
/*
* 1.1. Load the key
*/
mbedtls_printf( "\n . Loading the public key ..." );
fflush( stdout );
ret = mbedtls_pk_parse_public_keyfile( &pk, opt.filename );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_pk_parse_public_keyfile returned -0x%04x\n", -ret );
goto exit;
}
mbedtls_printf( " ok\n" );
mbedtls_printf( " . Key information ...\n" );
#if defined(MBEDTLS_RSA_C)
if( mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_RSA )
{
mbedtls_rsa_context *rsa = mbedtls_pk_rsa( pk );
if( ( ret = mbedtls_rsa_export( rsa, &N, NULL, NULL,
NULL, &E ) ) != 0 )
{
mbedtls_printf( " failed\n ! could not export RSA parameters\n\n" );
goto exit;
}
mbedtls_mpi_write_file( "N: ", &N, 16, NULL );
mbedtls_mpi_write_file( "E: ", &E, 16, NULL );
}
else
#endif
#if defined(MBEDTLS_ECP_C)
if( mbedtls_pk_get_type( &pk ) == MBEDTLS_PK_ECKEY )
{
mbedtls_ecp_keypair *ecp = mbedtls_pk_ec( pk );
mbedtls_mpi_write_file( "Q(X): ", &ecp->Q.X, 16, NULL );
mbedtls_mpi_write_file( "Q(Y): ", &ecp->Q.Y, 16, NULL );
mbedtls_mpi_write_file( "Q(Z): ", &ecp->Q.Z, 16, NULL );
}
else
#endif
{
mbedtls_printf("Do not know how to print key information for this type\n" );
goto exit;
}
}
else
goto usage;
exit:
#if defined(MBEDTLS_ERROR_C)
if( ret != 0 )
{
mbedtls_strerror( ret, buf, sizeof(buf) );
mbedtls_printf( " ! Last error was: %s\n", buf );
}
#endif
mbedtls_pk_free( &pk );
mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP );
mbedtls_mpi_free( &DQ ); mbedtls_mpi_free( &QP );
#if defined(_WIN32)
mbedtls_printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */
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