2024年1月9日发(作者：)

//// KRC.m// iOSKRCDecoder//// Created by zeng songgen on 12-8-2.// Copyright (c) 2012年 zeng songgen. All rights reserved.//#import "KRC.h"#import "GTMNSData+zlib.h"@implementation KRC//异或加密 密钥- (NSString *) Decode: (NSString * )filePath{ NSString * EncKey = @"@Gaw^2tGQ61-ÎÒni"; //char EncKey[] = { '@', 'G', 'a', 'w', '^', '2', 't', 'G', 'Q', '6', '1', '-', 'Î', 'Ò', 'n', 'i' };

NSData * totalBytes = [[NSMutableData alloc] initWithContentsOfFile:filePath]; //HeadBytes = [[NSMutableData alloc] initWithData:[totalBytes subdataWithRange:NSMakeRange(0, 4)]]; EncodedBytes = [[NSMutableData alloc] initWithData:[totalBytes subdataWithRange:NSMakeRange(4, - 4)]];

ZipBytes = [[NSMutableData alloc] initWithCapacity:];

Byte * encodedBytes = eBytes;

int EncodedBytesLength = ;

for (int i = 0; i < EncodedBytesLength; i++) { int l = i % 16; char c = [EncKey characterAtIndex:l];

Byte b = (Byte)((encodedBytes[i]) ^ c);

[ZipBytes appendBytes:&b length:1];

} UnzipBytes = [NSData gtm_dataByInflatingData:ZipBytes];

NSString * s = [[[NSString alloc] initWithData:UnzipBytes encoding:NSUTF8StringEncoding] autorelease];

return s;}@end