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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmMD5.h"
#include "gdcmSystem.h"
#ifdef GDCM_USE_SYSTEM_OPENSSL
#include <openssl/md5.h>
#elif defined(GDCM_BUILD_TESTING)
#include "gdcm_md5.h"
#endif
#include <string.h>//memcmp
#include <stdlib.h> // malloc
#include <stdio.h> // fopen
/*
*/
namespace gdcm
{
class MD5Internals
{
public:
};
MD5::MD5()
{
Internals = new MD5Internals;
}
MD5::~MD5()
{
delete Internals;
}
bool MD5::Compute(const char *buffer, unsigned long buf_len, char digest_str[33])
{
if( !buffer || !buf_len )
{
return false;
}
#ifdef GDCM_USE_SYSTEM_OPENSSL
unsigned char digest[16];
MD5_CTX ctx;
MD5_Init(&ctx);
MD5_Update(&ctx, buffer, buf_len);
MD5_Final(digest, &ctx);
#elif defined(GDCM_BUILD_TESTING)
md5_byte_t digest[16];
md5_state_t state;
md5_init(&state);
md5_append(&state, (const md5_byte_t *)buffer, (int)buf_len);
md5_finish(&state, digest);
#else
unsigned char digest[16] = {};
return false;
#endif
for (int di = 0; di < 16; ++di)
{
sprintf(digest_str+2*di, "%02x", digest[di]);
}
digest_str[2*16] = '\0';
return true;
}
#ifdef GDCM_USE_SYSTEM_OPENSSL
static bool process_file(const char *filename, unsigned char *digest)
{
if( !filename || !digest ) return false;
FILE *file = fopen(filename, "rb");
if(!file)
{
return false;
}
size_t file_size = System::FileSize(filename);
void *buffer = malloc(file_size);
if(!buffer)
{
fclose(file);
return false;
}
size_t read = fread(buffer, 1, file_size, file);
if( read != file_size ) return false;
MD5_CTX ctx;
MD5_Init(&ctx);
MD5_Update(&ctx, buffer, file_size);
MD5_Final(digest, &ctx);
/*printf("MD5 (\"%s\") = ", test[i]); */
/*for (int di = 0; di < 16; ++di)
{
printf("%02x", digest[di]);
}*/
//printf("\t%s\n", filename);
free(buffer);
fclose(file);
return true;
}
#elif defined(GDCM_BUILD_TESTING)
inline bool process_file(const char *filename, md5_byte_t *digest)
{
if( !filename || !digest ) return false;
FILE *file = fopen(filename, "rb");
if(!file)
{
return false;
}
size_t file_size = System::FileSize(filename);
void *buffer = malloc(file_size);
if(!buffer)
{
fclose(file);
return false;
}
size_t read = fread(buffer, 1, file_size, file);
if( read != file_size ) return false;
md5_state_t state;
md5_init(&state);
md5_append(&state, (const md5_byte_t *)buffer, (int)file_size);
md5_finish(&state, digest);
/*printf("MD5 (\"%s\") = ", test[i]); */
/*for (int di = 0; di < 16; ++di)
{
printf("%02x", digest[di]);
}*/
//printf("\t%s\n", filename);
free(buffer);
fclose(file);
return true;
}
#else
inline bool process_file(const char *, unsigned char *)
{
return false;
}
#endif
bool MD5::ComputeFile(const char *filename, char digest_str[33])
{
// If not file exist
// return false;
#ifdef GDCM_USE_SYSTEM_OPENSSL
unsigned char digest[16];
#elif defined(GDCM_BUILD_TESTING)
md5_byte_t digest[16];
#else
unsigned char digest[16] = {};
#endif
/* Do the file */
if( !process_file(filename, digest) )
{
return false;
}
for (int di = 0; di < 16; ++di)
{
sprintf(digest_str+2*di, "%02x", digest[di]);
}
digest_str[2*16] = '\0';
return true;
}
} // end namespace gdcm
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