mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-25 18:45:46 +01:00
- Addec crypt_and_hash example program of the generic hash and cipher layers
This commit is contained in:
Paul Bakker
parent
562535d11b
commit
20a7808d13
@ -17,6 +17,7 @@ Note: Most of these features have been donated by Fox-IT
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status, objects and configuration
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+ Added verification callback on certificate chain
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verification to allow external blacklisting
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+ Additional example programs to show usage
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* Added support for PKCS#11 through the use of the
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libpkcs11-helper library
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@ -7,7 +7,8 @@ CFLAGS = -I../include -D_FILE_OFFSET_BITS=64 -Wall -W -Wdeclaration-after-statem
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OFLAGS = -O
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LDFLAGS = -L../library -lpolarssl
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APPS = aes/aescrypt2 hash/hello \
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APPS = aes/aescrypt2 aes/crypt_and_hash \
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hash/hello \
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hash/md5sum hash/sha1sum \
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hash/sha2sum pkey/dh_client \
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pkey/dh_genprime pkey/dh_server \
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@ -26,6 +27,10 @@ aes/aescrypt2: aes/aescrypt2.c ../library/libpolarssl.a
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echo " CC aes/aescrypt2.c"
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$(CC) $(CFLAGS) $(OFLAGS) aes/aescrypt2.c $(LDFLAGS) -o $@
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aes/crypt_and_hash: aes/crypt_and_hash.c ../library/libpolarssl.a
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echo " CC aes/crypt_and_hash.c"
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$(CC) $(CFLAGS) $(OFLAGS) aes/crypt_and_hash.c $(LDFLAGS) -o $@
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hash/hello: hash/hello.c ../library/libpolarssl.a
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echo " CC hash/hello.c"
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$(CC) $(CFLAGS) $(OFLAGS) hash/hello.c $(LDFLAGS) -o $@
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@ -1,6 +1,9 @@
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add_executable(aescrypt2 aescrypt2.c)
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target_link_libraries(aescrypt2 polarssl)
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INSTALL(TARGETS aescrypt2
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add_executable(crypt_and_hash crypt_and_hash.c)
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target_link_libraries(crypt_and_hash polarssl)
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INSTALL(TARGETS aescrypt2 crypt_and_hash
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DESTINATION "bin"
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PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
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@ -56,7 +56,7 @@ int main( int argc, char *argv[] )
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{
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int ret = 1, i, n;
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int keylen, mode, lastn;
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FILE *fkey, *fin, *fout;
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FILE *fkey, *fin = NULL, *fout = NULL;
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char *p;
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unsigned char IV[16];
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@ -390,6 +390,8 @@ int main( int argc, char *argv[] )
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ret = 0;
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exit:
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fclose( fin );
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fclose( fout );
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memset( buffer, 0, sizeof( buffer ) );
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memset( digest, 0, sizeof( digest ) );
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462
programs/aes/crypt_and_hash.c
Normal file
462
programs/aes/crypt_and_hash.c
Normal file
@ -0,0 +1,462 @@
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/*
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* \brief Generic file encryption program using generic wrappers for configured
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* security.
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*
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* Copyright (C) 2006-2010, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _CRT_SECURE_NO_DEPRECATE
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#define _CRT_SECURE_NO_DEPRECATE 1
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#endif
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#if defined(WIN32)
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#include <windows.h>
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#include <io.h>
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#else
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#include <sys/types.h>
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#include <unistd.h>
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include "polarssl/cipher.h"
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#include "polarssl/md.h"
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#define MODE_ENCRYPT 0
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#define MODE_DECRYPT 1
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#define USAGE \
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"\n crypt_and_hash <mode> <input filename> <output filename> <cipher> <md> <key>\n" \
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"\n <mode>: 0 = encrypt, 1 = decrypt\n" \
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"\n example: crypt_and_hash 0 file file.aes AES-128-CBC SHA1 hex:E76B2413958B00E193\n" \
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"\n"
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int main( int argc, char *argv[] )
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{
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int ret = 1, i, n;
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int keylen, mode, lastn, olen;
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FILE *fkey, *fin = NULL, *fout = NULL;
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char *p;
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unsigned char IV[16];
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unsigned char key[512];
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unsigned char digest[POLARSSL_MD_MAX_SIZE];
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unsigned char buffer[1024];
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unsigned char output[1024];
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const cipher_info_t *cipher_info;
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const md_info_t *md_info;
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cipher_context_t cipher_ctx;
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md_context_t md_ctx;
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#if defined(WIN32)
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LARGE_INTEGER li_size;
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__int64 filesize, offset;
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#else
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off_t filesize, offset;
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#endif
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memset( &cipher_ctx, 0, sizeof( cipher_context_t ));
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memset( &md_ctx, 0, sizeof( md_context_t ));
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/*
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* Parse the command-line arguments.
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*/
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if( argc != 7 )
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{
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const int *list;
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printf( USAGE );
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printf( "Available ciphers:\n" );
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list = cipher_list();
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while( *list )
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{
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cipher_info = cipher_info_from_type( *list );
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printf( " %s\n", cipher_info->name );
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list++;
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}
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printf( "\nAvailable message digests:\n" );
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list = md_list();
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while( *list )
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{
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md_info = md_info_from_type( *list );
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printf( " %s\n", md_info->name );
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list++;
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}
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#if defined(WIN32)
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printf( "\n Press Enter to exit this program.\n" );
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fflush( stdout ); getchar();
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#endif
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goto exit;
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}
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mode = atoi( argv[1] );
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if( mode != MODE_ENCRYPT && mode != MODE_DECRYPT )
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{
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fprintf( stderr, "invalid operation mode\n" );
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goto exit;
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}
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if( strcmp( argv[2], argv[3] ) == 0 )
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{
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fprintf( stderr, "input and output filenames must differ\n" );
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goto exit;
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}
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if( ( fin = fopen( argv[2], "rb" ) ) == NULL )
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{
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fprintf( stderr, "fopen(%s,rb) failed\n", argv[2] );
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goto exit;
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}
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if( ( fout = fopen( argv[3], "wb+" ) ) == NULL )
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{
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fprintf( stderr, "fopen(%s,wb+) failed\n", argv[3] );
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goto exit;
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}
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/*
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* Read the Cipher and MD from the command line
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*/
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cipher_info = cipher_info_from_string( argv[4] );
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if( cipher_info == NULL )
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{
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fprintf( stderr, "Cipher '%s' not found\n", argv[4] );
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goto exit;
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}
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cipher_init_ctx( &cipher_ctx, cipher_info);
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md_info = md_info_from_string( argv[5] );
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if( md_info == NULL )
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{
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fprintf( stderr, "Message Digest '%s' not found\n", argv[5] );
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goto exit;
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}
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md_init_ctx( &md_ctx, md_info);
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/*
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* Read the secret key and clean the command line.
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*/
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if( ( fkey = fopen( argv[6], "rb" ) ) != NULL )
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{
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keylen = fread( key, 1, sizeof( key ), fkey );
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fclose( fkey );
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}
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else
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{
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if( memcmp( argv[6], "hex:", 4 ) == 0 )
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{
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p = &argv[6][4];
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keylen = 0;
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while( sscanf( p, "%02X", &n ) > 0 &&
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keylen < (int) sizeof( key ) )
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{
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key[keylen++] = (unsigned char) n;
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p += 2;
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}
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}
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else
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{
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keylen = strlen( argv[6] );
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if( keylen > (int) sizeof( key ) )
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keylen = (int) sizeof( key );
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memcpy( key, argv[6], keylen );
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}
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}
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memset( argv[6], 0, strlen( argv[6] ) );
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#if defined(WIN32)
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/*
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* Support large files (> 2Gb) on Win32
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*/
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li_size.QuadPart = 0;
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li_size.LowPart =
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SetFilePointer( (HANDLE) _get_osfhandle( _fileno( fin ) ),
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li_size.LowPart, &li_size.HighPart, FILE_END );
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if( li_size.LowPart == 0xFFFFFFFF && GetLastError() != NO_ERROR )
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{
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fprintf( stderr, "SetFilePointer(0,FILE_END) failed\n" );
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goto exit;
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}
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filesize = li_size.QuadPart;
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#else
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if( ( filesize = lseek( fileno( fin ), 0, SEEK_END ) ) < 0 )
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{
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perror( "lseek" );
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goto exit;
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}
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#endif
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if( fseek( fin, 0, SEEK_SET ) < 0 )
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{
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fprintf( stderr, "fseek(0,SEEK_SET) failed\n" );
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goto exit;
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}
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if( mode == MODE_ENCRYPT )
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{
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/*
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* Generate the initialization vector as:
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* IV = SHA-256( filesize || filename )[0..15]
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*/
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for( i = 0; i < 8; i++ )
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buffer[i] = (unsigned char)( filesize >> ( i << 3 ) );
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p = argv[2];
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md_starts( &md_ctx );
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md_update( &md_ctx, buffer, 8 );
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md_update( &md_ctx, (unsigned char *) p, strlen( p ) );
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md_finish( &md_ctx, digest );
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memcpy( IV, digest, 16 );
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/*
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* The last four bits in the IV are actually used
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* to store the file size modulo the AES block size.
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*/
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lastn = (int)( filesize & 0x0F );
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IV[15] = (unsigned char)
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( ( IV[15] & 0xF0 ) | lastn );
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/*
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* Append the IV at the beginning of the output.
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*/
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if( fwrite( IV, 1, 16, fout ) != 16 )
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{
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fprintf( stderr, "fwrite(%d bytes) failed\n", 16 );
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goto exit;
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}
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/*
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* Hash the IV and the secret key together 8192 times
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* using the result to setup the AES context and HMAC.
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*/
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memset( digest, 0, 32 );
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memcpy( digest, IV, 16 );
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for( i = 0; i < 8192; i++ )
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{
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md_starts( &md_ctx );
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md_update( &md_ctx, digest, 32 );
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md_update( &md_ctx, key, keylen );
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md_finish( &md_ctx, digest );
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}
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memset( key, 0, sizeof( key ) );
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cipher_setkey( &cipher_ctx, digest, cipher_info->key_length,
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POLARSSL_ENCRYPT );
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cipher_reset( &cipher_ctx, IV);
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md_hmac_starts( &md_ctx, digest, 32 );
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/*
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* Encrypt and write the ciphertext.
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*/
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for( offset = 0; offset < filesize; offset += cipher_get_block_size( &cipher_ctx ) )
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{
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n = ( filesize - offset > cipher_get_block_size( &cipher_ctx ) ) ?
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cipher_get_block_size( &cipher_ctx ) : (int) ( filesize - offset );
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if( fread( buffer, 1, n, fin ) != (size_t) n )
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{
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fprintf( stderr, "fread(%d bytes) failed\n", n );
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goto exit;
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}
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cipher_update( &cipher_ctx, buffer, n, output, &olen );
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md_hmac_update( &md_ctx, output, olen );
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if( fwrite( output, 1, olen, fout ) != (size_t) olen )
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{
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fprintf( stderr, "fwrite(%d bytes) failed\n", olen );
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goto exit;
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}
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}
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cipher_finish( &cipher_ctx, output, &olen );
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md_hmac_update( &md_ctx, output, olen );
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if( fwrite( output, 1, olen, fout ) != (size_t) olen )
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{
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fprintf( stderr, "fwrite(%d bytes) failed\n", n );
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goto exit;
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}
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/*
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* Finally write the HMAC.
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*/
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md_hmac_finish( &md_ctx, digest );
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if( fwrite( digest, 1, md_get_size( md_info), fout ) != md_get_size( md_info) )
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{
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fprintf( stderr, "fwrite(%d bytes) failed\n", md_get_size( md_info) );
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goto exit;
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}
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}
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if( mode == MODE_DECRYPT )
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{
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/*
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* The encrypted file must be structured as follows:
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*
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* 00 .. 15 Initialization Vector
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* 16 .. 31 AES Encrypted Block #1
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* ..
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* N*16 .. (N+1)*16 - 1 AES Encrypted Block #N
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* (N+1)*16 .. (N+1)*16 + 32 HMAC-SHA-256(ciphertext)
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*/
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if( filesize < 16 + md_get_size( md_info) )
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{
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fprintf( stderr, "File too short to be encrypted.\n" );
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goto exit;
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}
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if( ( filesize & 0x0F ) != 0 )
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{
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fprintf( stderr, "File size not a multiple of 16.\n" );
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goto exit;
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}
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/*
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* Substract the IV + HMAC length.
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*/
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filesize -= ( 16 + md_get_size( md_info ) );
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/*
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* Read the IV and original filesize modulo 16.
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*/
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if( fread( buffer, 1, 16, fin ) != 16 )
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{
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fprintf( stderr, "fread(%d bytes) failed\n", 16 );
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goto exit;
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}
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memcpy( IV, buffer, 16 );
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lastn = IV[15] & 0x0F;
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/*
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* Hash the IV and the secret key together 8192 times
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* using the result to setup the AES context and HMAC.
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*/
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memset( digest, 0, 32 );
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memcpy( digest, IV, 16 );
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for( i = 0; i < 8192; i++ )
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{
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md_starts( &md_ctx );
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md_update( &md_ctx, digest, 32 );
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md_update( &md_ctx, key, keylen );
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md_finish( &md_ctx, digest );
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}
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memset( key, 0, sizeof( key ) );
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cipher_setkey( &cipher_ctx, digest, cipher_info->key_length,
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POLARSSL_DECRYPT );
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cipher_reset( &cipher_ctx, IV);
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md_hmac_starts( &md_ctx, digest, 32 );
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/*
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* Decrypt and write the plaintext.
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*/
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for( offset = 0; offset < filesize; offset += cipher_get_block_size( &cipher_ctx ) )
|
||||
{
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if( fread( buffer, 1, cipher_get_block_size( &cipher_ctx ), fin ) !=
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(size_t) cipher_get_block_size( &cipher_ctx ) )
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{
|
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fprintf( stderr, "fread(%d bytes) failed\n",
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cipher_get_block_size( &cipher_ctx ) );
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goto exit;
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}
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|
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md_hmac_update( &md_ctx, buffer, cipher_get_block_size( &cipher_ctx ) );
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cipher_update( &cipher_ctx, buffer, cipher_get_block_size( &cipher_ctx ),
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output, &olen );
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if( fwrite( output, 1, olen, fout ) != (size_t) olen )
|
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{
|
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fprintf( stderr, "fwrite(%d bytes) failed\n", olen );
|
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goto exit;
|
||||
}
|
||||
}
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||||
|
||||
/*
|
||||
* Write the final block of data
|
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*/
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cipher_finish( &cipher_ctx, output, &olen );
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if( fwrite( output, 1, olen, fout ) != (size_t) olen )
|
||||
{
|
||||
fprintf( stderr, "fwrite(%d bytes) failed\n", olen );
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/*
|
||||
* Verify the message authentication code.
|
||||
*/
|
||||
md_hmac_finish( &md_ctx, digest );
|
||||
|
||||
if( fread( buffer, 1, md_get_size( md_info ), fin ) != md_get_size( md_info ) )
|
||||
{
|
||||
fprintf( stderr, "fread(%d bytes) failed\n", md_get_size( md_info ) );
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if( memcmp( digest, buffer, md_get_size( md_info ) ) != 0 )
|
||||
{
|
||||
fprintf( stderr, "HMAC check failed: wrong key, "
|
||||
"or file corrupted.\n" );
|
||||
goto exit;
|
||||
}
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
|
||||
exit:
|
||||
fclose( fin );
|
||||
fclose( fout );
|
||||
|
||||
memset( buffer, 0, sizeof( buffer ) );
|
||||
memset( digest, 0, sizeof( digest ) );
|
||||
|
||||
cipher_free_ctx( &cipher_ctx );
|
||||
md_free_ctx( &md_ctx );
|
||||
|
||||
return( ret );
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user