Question

I am trying to decrypt data in ios which was encrypted in Java. Following is the code:

+(NSString*) decryptData:(NSString*) data:( NSData*) passKey {

    NSString * strKey = [Base64Util encodeBase64WithData:passKey];
    NSLog( @" decryption key: %@" ,strKey);

    //decrypt `data
    NSData * nsData = [Base64Util decodeBase64WithString:data];
    NSLog(@"here 1: %@",nsData);

    size_t numOfBytesDecrypted;
    size_t bufferSize = nsData.length + kCCBlockSizeAES128;
    NSMutableData * buffer = [NSMutableData dataWithLength:bufferSize];
    CCCrypt(kCCDecrypt, kCCKeySizeAES128, kCCOptionECBMode , derivedKey.bytes, derivedKey.length, Nil , passCodeData.bytes, passCodeData.length, buffer. mutableBytes, bufferSize, &numOfBytesDecrypted);

    return [NSData dataWithBytesNoCopy:buffer. mutableBytes length :numOfBytesDecrypted];

}

But when the function CCCrypt executes, it throws up an EXC_BAD_ACCESS code 2. I have ARC enabled. I am unable to find the cause of the error. An help would be appreciated.

Answer 1

Really silly of me.

The second parameter should be kCCAlgorithmAES128