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- /*
- * generic message digest layer demonstration program
- *
- * 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>
- #include <stdlib.h>
- #define mbedtls_fprintf fprintf
- #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_MD_C) && defined(MBEDTLS_FS_IO)
- #include "mbedtls/md.h"
- #include <stdio.h>
- #include <string.h>
- #endif
- #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_FS_IO)
- int main( void )
- {
- mbedtls_printf("MBEDTLS_MD_C and/or MBEDTLS_FS_IO not defined.\n");
- return( 0 );
- }
- #else
- static int generic_wrapper( const mbedtls_md_info_t *md_info, char *filename, unsigned char *sum )
- {
- int ret = mbedtls_md_file( md_info, filename, sum );
- if( ret == 1 )
- mbedtls_fprintf( stderr, "failed to open: %s\n", filename );
- if( ret == 2 )
- mbedtls_fprintf( stderr, "failed to read: %s\n", filename );
- return( ret );
- }
- static int generic_print( const mbedtls_md_info_t *md_info, char *filename )
- {
- int i;
- unsigned char sum[MBEDTLS_MD_MAX_SIZE];
- if( generic_wrapper( md_info, filename, sum ) != 0 )
- return( 1 );
- for( i = 0; i < mbedtls_md_get_size( md_info ); i++ )
- mbedtls_printf( "%02x", sum[i] );
- mbedtls_printf( " %s\n", filename );
- return( 0 );
- }
- static int generic_check( const mbedtls_md_info_t *md_info, char *filename )
- {
- int i;
- size_t n;
- FILE *f;
- int nb_err1, nb_err2;
- int nb_tot1, nb_tot2;
- unsigned char sum[MBEDTLS_MD_MAX_SIZE];
- char line[1024];
- char diff;
- #if defined(__clang_analyzer__)
- char buf[MBEDTLS_MD_MAX_SIZE * 2 + 1] = { };
- #else
- char buf[MBEDTLS_MD_MAX_SIZE * 2 + 1];
- #endif
- if( ( f = fopen( filename, "rb" ) ) == NULL )
- {
- mbedtls_printf( "failed to open: %s\n", filename );
- return( 1 );
- }
- nb_err1 = nb_err2 = 0;
- nb_tot1 = nb_tot2 = 0;
- memset( line, 0, sizeof( line ) );
- n = sizeof( line );
- while( fgets( line, (int) n - 1, f ) != NULL )
- {
- n = strlen( line );
- if( n < (size_t) 2 * mbedtls_md_get_size( md_info ) + 4 )
- {
- mbedtls_printf("No '%s' hash found on line.\n", mbedtls_md_get_name( md_info ));
- continue;
- }
- if( line[2 * mbedtls_md_get_size( md_info )] != ' ' || line[2 * mbedtls_md_get_size( md_info ) + 1] != ' ' )
- {
- mbedtls_printf("No '%s' hash found on line.\n", mbedtls_md_get_name( md_info ));
- continue;
- }
- if( line[n - 1] == '\n' ) { n--; line[n] = '\0'; }
- if( line[n - 1] == '\r' ) { n--; line[n] = '\0'; }
- nb_tot1++;
- if( generic_wrapper( md_info, line + 2 + 2 * mbedtls_md_get_size( md_info ), sum ) != 0 )
- {
- nb_err1++;
- continue;
- }
- nb_tot2++;
- for( i = 0; i < mbedtls_md_get_size( md_info ); i++ )
- sprintf( buf + i * 2, "%02x", sum[i] );
- /* Use constant-time buffer comparison */
- diff = 0;
- for( i = 0; i < 2 * mbedtls_md_get_size( md_info ); i++ )
- diff |= line[i] ^ buf[i];
- if( diff != 0 )
- {
- nb_err2++;
- mbedtls_fprintf( stderr, "wrong checksum: %s\n", line + 66 );
- }
- n = sizeof( line );
- }
- if( nb_err1 != 0 )
- {
- mbedtls_printf( "WARNING: %d (out of %d) input files could "
- "not be read\n", nb_err1, nb_tot1 );
- }
- if( nb_err2 != 0 )
- {
- mbedtls_printf( "WARNING: %d (out of %d) computed checksums did "
- "not match\n", nb_err2, nb_tot2 );
- }
- fclose( f );
- return( nb_err1 != 0 || nb_err2 != 0 );
- }
- int main( int argc, char *argv[] )
- {
- int ret = 1, i;
- int exit_code = MBEDTLS_EXIT_FAILURE;
- const mbedtls_md_info_t *md_info;
- mbedtls_md_context_t md_ctx;
- mbedtls_md_init( &md_ctx );
- if( argc == 1 )
- {
- const int *list;
- mbedtls_printf( "print mode: generic_sum <mbedtls_md> <file> <file> ...\n" );
- mbedtls_printf( "check mode: generic_sum <mbedtls_md> -c <checksum file>\n" );
- mbedtls_printf( "\nAvailable message digests:\n" );
- list = mbedtls_md_list();
- while( *list )
- {
- md_info = mbedtls_md_info_from_type( *list );
- mbedtls_printf( " %s\n", mbedtls_md_get_name( md_info ) );
- list++;
- }
- #if defined(_WIN32)
- mbedtls_printf( "\n Press Enter to exit this program.\n" );
- fflush( stdout ); getchar();
- #endif
- return( exit_code );
- }
- /*
- * Read the MD from the command line
- */
- md_info = mbedtls_md_info_from_string( argv[1] );
- if( md_info == NULL )
- {
- mbedtls_fprintf( stderr, "Message Digest '%s' not found\n", argv[1] );
- return( exit_code );
- }
- if( mbedtls_md_setup( &md_ctx, md_info, 0 ) )
- {
- mbedtls_fprintf( stderr, "Failed to initialize context.\n" );
- return( exit_code );
- }
- ret = 0;
- if( argc == 4 && strcmp( "-c", argv[2] ) == 0 )
- {
- ret |= generic_check( md_info, argv[3] );
- goto exit;
- }
- for( i = 2; i < argc; i++ )
- ret |= generic_print( md_info, argv[i] );
- if ( ret == 0 )
- exit_code = MBEDTLS_EXIT_SUCCESS;
- exit:
- mbedtls_md_free( &md_ctx );
- return( exit_code );
- }
- #endif /* MBEDTLS_MD_C && MBEDTLS_FS_IO */
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