441 lines
12 KiB
C
441 lines
12 KiB
C
/*
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* Key writing application
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#define mbedtls_printf printf
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#define mbedtls_exit exit
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#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
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#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
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#endif /* MBEDTLS_PLATFORM_C */
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#if defined(MBEDTLS_PK_WRITE_C) && defined(MBEDTLS_FS_IO)
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#include "mbedtls/error.h"
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#include "mbedtls/pk.h"
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#include "mbedtls/error.h"
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#include <stdio.h>
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#include <string.h>
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#endif
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#if defined(MBEDTLS_PEM_WRITE_C)
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#define USAGE_OUT \
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" output_file=%%s default: keyfile.pem\n" \
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" output_format=pem|der default: pem\n"
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#else
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#define USAGE_OUT \
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" output_file=%%s default: keyfile.der\n" \
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" output_format=der default: der\n"
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#endif
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#if defined(MBEDTLS_PEM_WRITE_C)
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#define DFL_OUTPUT_FILENAME "keyfile.pem"
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#define DFL_OUTPUT_FORMAT OUTPUT_FORMAT_PEM
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#else
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#define DFL_OUTPUT_FILENAME "keyfile.der"
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#define DFL_OUTPUT_FORMAT OUTPUT_FORMAT_DER
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#endif
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#define DFL_MODE MODE_NONE
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#define DFL_FILENAME "keyfile.key"
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#define DFL_DEBUG_LEVEL 0
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#define DFL_OUTPUT_MODE OUTPUT_MODE_NONE
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#define MODE_NONE 0
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#define MODE_PRIVATE 1
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#define MODE_PUBLIC 2
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#define OUTPUT_MODE_NONE 0
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#define OUTPUT_MODE_PRIVATE 1
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#define OUTPUT_MODE_PUBLIC 2
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#define OUTPUT_FORMAT_PEM 0
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#define OUTPUT_FORMAT_DER 1
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#define USAGE \
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"\n usage: key_app_writer param=<>...\n" \
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"\n acceptable parameters:\n" \
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" mode=private|public default: none\n" \
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" filename=%%s default: keyfile.key\n" \
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" output_mode=private|public default: none\n" \
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USAGE_OUT \
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"\n"
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#if !defined(MBEDTLS_PK_PARSE_C) || \
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!defined(MBEDTLS_PK_WRITE_C) || \
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!defined(MBEDTLS_FS_IO)
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int main( void )
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{
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mbedtls_printf( "MBEDTLS_PK_PARSE_C and/or MBEDTLS_PK_WRITE_C and/or MBEDTLS_FS_IO not defined.\n" );
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mbedtls_exit( 0 );
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}
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#else
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/*
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* global options
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*/
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struct options
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{
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int mode; /* the mode to run the application in */
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const char *filename; /* filename of the key file */
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int output_mode; /* the output mode to use */
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const char *output_file; /* where to store the constructed key file */
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int output_format; /* the output format to use */
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} opt;
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static int write_public_key( mbedtls_pk_context *key, const char *output_file )
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{
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int ret;
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FILE *f;
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unsigned char output_buf[16000];
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unsigned char *c = output_buf;
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size_t len = 0;
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memset(output_buf, 0, 16000);
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#if defined(MBEDTLS_PEM_WRITE_C)
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if( opt.output_format == OUTPUT_FORMAT_PEM )
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{
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if( ( ret = mbedtls_pk_write_pubkey_pem( key, output_buf, 16000 ) ) != 0 )
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return( ret );
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len = strlen( (char *) output_buf );
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}
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else
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#endif
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{
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if( ( ret = mbedtls_pk_write_pubkey_der( key, output_buf, 16000 ) ) < 0 )
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return( ret );
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len = ret;
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c = output_buf + sizeof(output_buf) - len;
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}
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if( ( f = fopen( output_file, "w" ) ) == NULL )
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return( -1 );
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if( fwrite( c, 1, len, f ) != len )
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{
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fclose( f );
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return( -1 );
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}
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fclose( f );
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return( 0 );
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}
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static int write_private_key( mbedtls_pk_context *key, const char *output_file )
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{
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int ret;
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FILE *f;
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unsigned char output_buf[16000];
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unsigned char *c = output_buf;
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size_t len = 0;
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memset(output_buf, 0, 16000);
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#if defined(MBEDTLS_PEM_WRITE_C)
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if( opt.output_format == OUTPUT_FORMAT_PEM )
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{
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if( ( ret = mbedtls_pk_write_key_pem( key, output_buf, 16000 ) ) != 0 )
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return( ret );
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len = strlen( (char *) output_buf );
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}
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else
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#endif
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{
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if( ( ret = mbedtls_pk_write_key_der( key, output_buf, 16000 ) ) < 0 )
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return( ret );
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len = ret;
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c = output_buf + sizeof(output_buf) - len;
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}
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if( ( f = fopen( output_file, "w" ) ) == NULL )
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return( -1 );
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if( fwrite( c, 1, len, f ) != len )
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{
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fclose( f );
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return( -1 );
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}
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fclose( f );
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return( 0 );
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}
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int main( int argc, char *argv[] )
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{
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int ret = 1;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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char buf[1024];
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int i;
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char *p, *q;
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mbedtls_pk_context key;
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mbedtls_mpi N, P, Q, D, E, DP, DQ, QP;
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/*
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* Set to sane values
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*/
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mbedtls_pk_init( &key );
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memset( buf, 0, sizeof( buf ) );
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mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P ); mbedtls_mpi_init( &Q );
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mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP );
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mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
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if( argc == 0 )
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{
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usage:
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mbedtls_printf( USAGE );
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goto exit;
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}
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opt.mode = DFL_MODE;
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opt.filename = DFL_FILENAME;
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opt.output_mode = DFL_OUTPUT_MODE;
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opt.output_file = DFL_OUTPUT_FILENAME;
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opt.output_format = DFL_OUTPUT_FORMAT;
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for( i = 1; i < argc; i++ )
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{
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p = argv[i];
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if( ( q = strchr( p, '=' ) ) == NULL )
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goto usage;
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*q++ = '\0';
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if( strcmp( p, "mode" ) == 0 )
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{
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if( strcmp( q, "private" ) == 0 )
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opt.mode = MODE_PRIVATE;
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else if( strcmp( q, "public" ) == 0 )
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opt.mode = MODE_PUBLIC;
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else
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goto usage;
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}
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else if( strcmp( p, "output_mode" ) == 0 )
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{
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if( strcmp( q, "private" ) == 0 )
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opt.output_mode = OUTPUT_MODE_PRIVATE;
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else if( strcmp( q, "public" ) == 0 )
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opt.output_mode = OUTPUT_MODE_PUBLIC;
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else
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goto usage;
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}
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else if( strcmp( p, "output_format" ) == 0 )
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{
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#if defined(MBEDTLS_PEM_WRITE_C)
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if( strcmp( q, "pem" ) == 0 )
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opt.output_format = OUTPUT_FORMAT_PEM;
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else
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#endif
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if( strcmp( q, "der" ) == 0 )
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opt.output_format = OUTPUT_FORMAT_DER;
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else
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goto usage;
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}
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else if( strcmp( p, "filename" ) == 0 )
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opt.filename = q;
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else if( strcmp( p, "output_file" ) == 0 )
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opt.output_file = q;
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else
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goto usage;
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}
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if( opt.mode == MODE_NONE && opt.output_mode != OUTPUT_MODE_NONE )
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{
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mbedtls_printf( "\nCannot output a key without reading one.\n");
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goto exit;
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}
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if( opt.mode == MODE_PUBLIC && opt.output_mode == OUTPUT_MODE_PRIVATE )
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{
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mbedtls_printf( "\nCannot output a private key from a public key.\n");
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goto exit;
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}
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if( opt.mode == MODE_PRIVATE )
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{
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/*
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* 1.1. Load the key
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*/
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mbedtls_printf( "\n . Loading the private key ..." );
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fflush( stdout );
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ret = mbedtls_pk_parse_keyfile( &key, opt.filename, NULL );
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if( ret != 0 )
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{
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mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
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mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile returned -0x%04x - %s\n\n", (unsigned int) -ret, buf );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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/*
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* 1.2 Print the key
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*/
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mbedtls_printf( " . Key information ...\n" );
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#if defined(MBEDTLS_RSA_C)
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if( mbedtls_pk_get_type( &key ) == MBEDTLS_PK_RSA )
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{
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mbedtls_rsa_context *rsa = mbedtls_pk_rsa( key );
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if( ( ret = mbedtls_rsa_export ( rsa, &N, &P, &Q, &D, &E ) ) != 0 ||
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( ret = mbedtls_rsa_export_crt( rsa, &DP, &DQ, &QP ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! could not export RSA parameters\n\n" );
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goto exit;
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}
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mbedtls_mpi_write_file( "N: ", &N, 16, NULL );
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mbedtls_mpi_write_file( "E: ", &E, 16, NULL );
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mbedtls_mpi_write_file( "D: ", &D, 16, NULL );
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mbedtls_mpi_write_file( "P: ", &P, 16, NULL );
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mbedtls_mpi_write_file( "Q: ", &Q, 16, NULL );
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mbedtls_mpi_write_file( "DP: ", &DP, 16, NULL );
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mbedtls_mpi_write_file( "DQ: ", &DQ, 16, NULL );
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mbedtls_mpi_write_file( "QP: ", &QP, 16, NULL );
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}
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else
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#endif
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#if defined(MBEDTLS_ECP_C)
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if( mbedtls_pk_get_type( &key ) == MBEDTLS_PK_ECKEY )
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{
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mbedtls_ecp_keypair *ecp = mbedtls_pk_ec( key );
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mbedtls_mpi_write_file( "Q(X): ", &ecp->Q.X, 16, NULL );
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mbedtls_mpi_write_file( "Q(Y): ", &ecp->Q.Y, 16, NULL );
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mbedtls_mpi_write_file( "Q(Z): ", &ecp->Q.Z, 16, NULL );
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mbedtls_mpi_write_file( "D : ", &ecp->d , 16, NULL );
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}
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else
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#endif
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mbedtls_printf("key type not supported yet\n");
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}
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else if( opt.mode == MODE_PUBLIC )
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{
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/*
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* 1.1. Load the key
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*/
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mbedtls_printf( "\n . Loading the public key ..." );
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fflush( stdout );
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ret = mbedtls_pk_parse_public_keyfile( &key, opt.filename );
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if( ret != 0 )
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{
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mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
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mbedtls_printf( " failed\n ! mbedtls_pk_parse_public_key returned -0x%04x - %s\n\n", (unsigned int) -ret, buf );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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/*
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* 1.2 Print the key
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*/
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mbedtls_printf( " . Key information ...\n" );
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#if defined(MBEDTLS_RSA_C)
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if( mbedtls_pk_get_type( &key ) == MBEDTLS_PK_RSA )
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{
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mbedtls_rsa_context *rsa = mbedtls_pk_rsa( key );
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if( ( ret = mbedtls_rsa_export( rsa, &N, NULL, NULL,
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NULL, &E ) ) != 0 )
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{
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mbedtls_printf( " failed\n ! could not export RSA parameters\n\n" );
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goto exit;
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}
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mbedtls_mpi_write_file( "N: ", &N, 16, NULL );
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mbedtls_mpi_write_file( "E: ", &E, 16, NULL );
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}
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else
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#endif
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#if defined(MBEDTLS_ECP_C)
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if( mbedtls_pk_get_type( &key ) == MBEDTLS_PK_ECKEY )
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{
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mbedtls_ecp_keypair *ecp = mbedtls_pk_ec( key );
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mbedtls_mpi_write_file( "Q(X): ", &ecp->Q.X, 16, NULL );
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mbedtls_mpi_write_file( "Q(Y): ", &ecp->Q.Y, 16, NULL );
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mbedtls_mpi_write_file( "Q(Z): ", &ecp->Q.Z, 16, NULL );
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}
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else
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#endif
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mbedtls_printf("key type not supported yet\n");
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}
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else
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goto usage;
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if( opt.output_mode == OUTPUT_MODE_PUBLIC )
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{
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write_public_key( &key, opt.output_file );
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}
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if( opt.output_mode == OUTPUT_MODE_PRIVATE )
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{
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write_private_key( &key, opt.output_file );
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}
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exit_code = MBEDTLS_EXIT_SUCCESS;
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exit:
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if( exit_code != MBEDTLS_EXIT_SUCCESS )
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{
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#ifdef MBEDTLS_ERROR_C
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mbedtls_strerror( ret, buf, sizeof( buf ) );
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mbedtls_printf( " - %s\n", buf );
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#else
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mbedtls_printf("\n");
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#endif
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}
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mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
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mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP );
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mbedtls_mpi_free( &DQ ); mbedtls_mpi_free( &QP );
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mbedtls_pk_free( &key );
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#if defined(_WIN32)
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mbedtls_printf( " + Press Enter to exit this program.\n" );
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fflush( stdout ); getchar();
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#endif
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mbedtls_exit( exit_code );
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}
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#endif /* MBEDTLS_PK_PARSE_C && MBEDTLS_PK_WRITE_C && MBEDTLS_FS_IO */
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