mirror of
https://github.com/yuzu-emu/mbedtls.git
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3b0c430638
This is done to account for platforms, for which we want custom behavior upon the program termination, hence we call `mbedtls_exit()` instead of returning from `main()`. For the sake of consistency, introduces the modifications have been made to the test and utility examples as well. These, while less likely to be used in the low level environments, won't suffer from such a change.
296 lines
6.7 KiB
C
296 lines
6.7 KiB
C
/*
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* Convert PEM to DER
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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_free free
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#define mbedtls_calloc calloc
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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_BASE64_C) && defined(MBEDTLS_FS_IO)
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#include "mbedtls/error.h"
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#include "mbedtls/base64.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#endif
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#define DFL_FILENAME "file.pem"
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#define DFL_OUTPUT_FILENAME "file.der"
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#define USAGE \
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"\n usage: pem2der param=<>...\n" \
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"\n acceptable parameters:\n" \
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" filename=%%s default: file.pem\n" \
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" output_file=%%s default: file.der\n" \
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"\n"
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#if !defined(MBEDTLS_BASE64_C) || !defined(MBEDTLS_FS_IO)
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int main( void )
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{
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mbedtls_printf("MBEDTLS_BASE64_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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const char *filename; /* filename of the input file */
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const char *output_file; /* where to store the output */
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} opt;
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int convert_pem_to_der( const unsigned char *input, size_t ilen,
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unsigned char *output, size_t *olen )
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{
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int ret;
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const unsigned char *s1, *s2, *end = input + ilen;
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size_t len = 0;
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s1 = (unsigned char *) strstr( (const char *) input, "-----BEGIN" );
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if( s1 == NULL )
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return( -1 );
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s2 = (unsigned char *) strstr( (const char *) input, "-----END" );
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if( s2 == NULL )
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return( -1 );
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s1 += 10;
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while( s1 < end && *s1 != '-' )
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s1++;
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while( s1 < end && *s1 == '-' )
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s1++;
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if( *s1 == '\r' ) s1++;
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if( *s1 == '\n' ) s1++;
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if( s2 <= s1 || s2 > end )
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return( -1 );
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ret = mbedtls_base64_decode( NULL, 0, &len, (const unsigned char *) s1, s2 - s1 );
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if( ret == MBEDTLS_ERR_BASE64_INVALID_CHARACTER )
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return( ret );
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if( len > *olen )
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return( -1 );
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if( ( ret = mbedtls_base64_decode( output, len, &len, (const unsigned char *) s1,
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s2 - s1 ) ) != 0 )
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{
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return( ret );
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}
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*olen = len;
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return( 0 );
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}
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/*
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* Load all data from a file into a given buffer.
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*/
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static int load_file( const char *path, unsigned char **buf, size_t *n )
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{
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FILE *f;
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long size;
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if( ( f = fopen( path, "rb" ) ) == NULL )
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return( -1 );
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fseek( f, 0, SEEK_END );
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if( ( size = ftell( f ) ) == -1 )
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{
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fclose( f );
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return( -1 );
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}
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fseek( f, 0, SEEK_SET );
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*n = (size_t) size;
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if( *n + 1 == 0 ||
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( *buf = mbedtls_calloc( 1, *n + 1 ) ) == NULL )
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{
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fclose( f );
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return( -1 );
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}
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if( fread( *buf, 1, *n, f ) != *n )
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{
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fclose( f );
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free( *buf );
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*buf = NULL;
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return( -1 );
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}
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fclose( f );
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(*buf)[*n] = '\0';
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return( 0 );
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}
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/*
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* Write buffer to a file
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*/
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static int write_file( const char *path, unsigned char *buf, size_t n )
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{
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FILE *f;
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if( ( f = fopen( path, "wb" ) ) == NULL )
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return( -1 );
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if( fwrite( buf, 1, n, f ) != n )
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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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unsigned char *pem_buffer = NULL;
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unsigned char der_buffer[4096];
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char buf[1024];
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size_t pem_size, der_size = sizeof(der_buffer);
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int i;
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char *p, *q;
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/*
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* Set to sane values
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*/
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memset( buf, 0, sizeof(buf) );
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memset( der_buffer, 0, sizeof(der_buffer) );
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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.filename = DFL_FILENAME;
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opt.output_file = DFL_OUTPUT_FILENAME;
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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, "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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/*
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* 1.1. Load the PEM file
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*/
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mbedtls_printf( "\n . Loading the PEM file ..." );
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fflush( stdout );
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ret = load_file( opt.filename, &pem_buffer, &pem_size );
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if( ret != 0 )
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{
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#ifdef MBEDTLS_ERROR_C
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mbedtls_strerror( ret, buf, 1024 );
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#endif
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mbedtls_printf( " failed\n ! load_file returned %d - %s\n\n", 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. Convert from PEM to DER
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*/
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mbedtls_printf( " . Converting from PEM to DER ..." );
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fflush( stdout );
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if( ( ret = convert_pem_to_der( pem_buffer, pem_size, der_buffer, &der_size ) ) != 0 )
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{
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#ifdef MBEDTLS_ERROR_C
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mbedtls_strerror( ret, buf, 1024 );
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#endif
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mbedtls_printf( " failed\n ! convert_pem_to_der %d - %s\n\n", 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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* 1.3. Write the DER file
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*/
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mbedtls_printf( " . Writing the DER file ..." );
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fflush( stdout );
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ret = write_file( opt.output_file, der_buffer, der_size );
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if( ret != 0 )
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{
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#ifdef MBEDTLS_ERROR_C
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mbedtls_strerror( ret, buf, 1024 );
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#endif
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mbedtls_printf( " failed\n ! write_file returned %d - %s\n\n", ret, buf );
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goto exit;
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}
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mbedtls_printf( " ok\n" );
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exit_code = MBEDTLS_EXIT_SUCCESS;
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exit:
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free( pem_buffer );
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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_BASE64_C && MBEDTLS_FS_IO */
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