EncryptTool
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EncryptTool.h
//// Des.h// HungryBear//// Created by Bruce Yang on 12-5-26.// Copyright (c) 2012年 EricGameStudio. All rights reserved.//#import <Foundation/Foundation.h>#import <CommonCrypto/CommonCryptor.h>#import "GTMBase64.h"@interface EncryptTool : NSObject { }+(EncryptTool*) et;+(NSString*) parseByte2HexString:(Byte*)bytes;+(NSString*) parseByteArray2HexString:(Byte[])bytes;-(id) init;-(NSString*) encryptUseDES:(NSString*)plainText key:(NSString*)key;-(NSString*) decryptUseDES:(NSString*)cipherText key:(NSString*)key;@endEncryptTool.mm
//// Des.mm// HungryBear//// Created by Bruce Yang on 12-5-26.// Copyright (c) 2012年 EricGameStudio. All rights reserved.//#import "EncryptTool.h"@implementation EncryptToolstatic Byte _iv_[] = {1, 2, 3, 4, 5, 6, 7, 8};+(EncryptTool*) et { return [[[self alloc] init] autorelease];}+(NSString*) parseByte2HexString:(Byte*) bytes { NSMutableString *hexStr = [[NSMutableString alloc]init]; int i = 0; if(bytes) { while (bytes[i] != '\0') { NSString *hexByte = [NSString stringWithFormat:@"%x",bytes[i] & 0xff];///16进制数 if([hexByte length]==1) { [hexStr appendFormat:@"0%@", hexByte]; } else { [hexStr appendFormat:@"%@", hexByte]; } i ++; } } NSLog(@"bytes 的16进制数为:%@",hexStr); return hexStr;}+(NSString*) parseByteArray2HexString:(Byte[]) bytes { NSMutableString *hexStr = [[NSMutableString alloc]init]; int i = 0; if(bytes) { while (bytes[i] != '\0') { NSString *hexByte = [NSString stringWithFormat:@"%x",bytes[i] & 0xff];///16进制数 if([hexByte length]==1) { [hexStr appendFormat:@"0%@", hexByte]; } else { [hexStr appendFormat:@"%@", hexByte]; } i ++; } } NSLog(@"bytes 的16进制数为:%@",hexStr); return hexStr;}-(id) init { if((self = [super init])) { } return self;}-(NSString*) encryptUseDES:(NSString*)plainText key:(NSString*)key { const char* textBytes = [plainText UTF8String]; NSUInteger dataLength = [plainText length]; unsigned char buffer[1024]; memset(buffer, 0, sizeof(char)); size_t numBytesEncrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionPKCS7Padding, [key UTF8String], kCCKeySizeDES, _iv_, textBytes, dataLength, buffer, 1024, &numBytesEncrypted); NSString* cipherText = nil; if (cryptStatus == kCCSuccess) { NSData* data = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesEncrypted]; cipherText = [GTMBase64 stringByEncodingData:data]; } return cipherText;}-(NSString*) decryptUseDES:(NSString*)cipherText key:(NSString*)key { NSData* cipherData = [GTMBase64 decodeString:cipherText]; // 8kB~ unsigned char buffer[8196]; memset(buffer, 0, sizeof(char)); size_t numBytesDecrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmDES, kCCOptionPKCS7Padding, [key UTF8String], kCCKeySizeDES, _iv_, [cipherData bytes], [cipherData length], buffer, 8196, &numBytesDecrypted); NSString* plainText = nil; /** * 2012.05.27.09.34,中间遇到一个问题， * 查看了一下返回的状态码，皆是因为 buffer 的尺寸过小所致 * 最开始 buffer 的长度是 1024~ */// NSLog(@"%d", cryptStatus); if (cryptStatus == kCCSuccess) { NSData* data = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesDecrypted]; plainText = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease]; } return plainText;}@end
