//
//  CSCheckSum.m
//  Gandalf
//
//  Created by Colin Cornaby on Sat Feb 15 2003.
//  Copyright (c) 2003 Carpe Stellarem. All rights reserved.
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.

//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

#import "CSCheckSum.h"
#include "openssl/sha.h"



@implementation CSCheckSum
+(NSData *)hashForFile:(NSString *)theFile{
    NSData *theData = [[NSData alloc] initWithContentsOfFile:theFile];
    unsigned long byteCountOfData = [theData length];
    unsigned char hash[SHA_DIGEST_LENGTH];
    [theData autorelease];
    return [NSData dataWithBytes:SHA1([theData bytes], byteCountOfData, hash) length:SHA_DIGEST_LENGTH];
}


+(NSData *)hashForData:(NSData *)theData{
    unsigned long byteCountOfData = [theData length];
    unsigned char hash[SHA_DIGEST_LENGTH];
    return [NSData dataWithBytes:SHA1([theData bytes], byteCountOfData, hash) length:SHA_DIGEST_LENGTH];
    
}

@end
