iphone加密不起作用

Question

我有這個加密/解密執行和執行沒有錯誤，但我無法解密的數據和im不知道數據是否加密，請幫助。

- (NSData *)AES256EncryptWithKey:(NSString *)key { 

char keyPtr[kCCKeySizeAES256+1]; 
bzero(keyPtr, sizeof(keyPtr)); 


[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; 


NSUInteger dataLength = [strData length]; 
data = [[NSData alloc] init]; 
data = [strData dataUsingEncoding:NSUTF8StringEncoding]; 


size_t bufferSize = dataLength + kCCBlockSizeAES128; 
void *pribuffer = malloc(bufferSize); 

size_t numBytesEncrypted = 0; 
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding, 
             keyPtr, kCCKeySizeAES256, 
             NULL /* initialization vector (optional) */, 
             [data bytes], dataLength, /* input */ 
             [data bytes], bufferSize, /* output */ 
             &numBytesEncrypted); 
if (cryptStatus == kCCSuccess) { 
    return [NSData dataWithBytesNoCopy:data length:numBytesEncrypted]; 
}} 

解密是：

-(NSData *)AES256DecryptWithKey:(NSString *)key andForData:(NSData *)objDataObject { 
char keyPtr[kCCKeySizeAES256+1]; 
bzero(keyPtr, sizeof(keyPtr)); 
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; 

NSUInteger dataLength = [objDataObject length]; 
size_t bufferSize = dataLength + kCCBlockSizeAES128; 
void *buffer = malloc(bufferSize); 

size_t numBytesDecrypted = 0; 
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding, 
             keyPtr, kCCKeySizeAES256, 
             NULL, 
             [objDataObject bytes], dataLength, 
             [objDataObject bytes], bufferSize, 
             &numBytesDecrypted); 

if (cryptStatus == kCCSuccess) { 
    return [NSData dataWithBytesNoCopy:objDataObject length:numBytesDecrypted]; 
} 

}

我調用上面的方法是這樣的：

CryptoClass *obj = [CryptoClass new]; 
NSData *objData = [obj AES256EncryptWithKey:@"hell"]; 

NSData *val = [obj AES256DecryptWithKey:@"hell" andForData:objData ]; 

NSLog(@"decrypted string is : %@ AND LENGTH IS %d",[val description],[val length]); 

解密似乎並不在所有發生和加密 - 我我不確定，請在這裏幫助我。

Answer 1

我已經是自己學的，

完全實現其能再見通CCATS是：

http://pastie.org/966473

感謝所有誰幫助。