objective-c - AES128 加密/解密问题

Question

在 xcode 版本 11.3 到 11.7 和 12.3 之间为相同的键和向量获取不同的字节代码。请帮助我做错了什么。

Key:NT#OALfxhpStJNY#rpEAJz1kh3psgxw#wqF7cJy7BBgvJZfmlIm1awBVRioMjA1x
vector:6Pb8UooYS8qM!Hdbl3aVYgPufnAKgmaT

- (NSData *)hex:(NSString *)data
{
    if (data.length == 0) { return nil; }
    
    static const unsigned char HexDecodeChars[] = 
    {
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 1, //49
        2, 3, 4, 5, 6, 7, 8, 9, 0, 0, //59
        0, 0, 0, 0, 0, 10, 11, 12, 13, 14,
        15, 0, 0, 0, 0, 0, 0, 0, 0, 0,  //79
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 10, 11, 12,   //99
        13, 14, 15
    };
    
    // convert data(NSString) to CString
    const char *source = [data cStringUsingEncoding:NSUTF8StringEncoding];
    // malloc buffer
    unsigned char *buffer;
    NSUInteger length = strlen(source) / 2;
    buffer = malloc(length);
    for (NSUInteger index = 0; index < length; index++) {
        buffer[index] = (HexDecodeChars[source[index * 2]] << 4) + (HexDecodeChars[source[index * 2 + 1]]);
    }
    // init result NSData
    NSData *result = [NSData dataWithBytes:buffer length:length];
    free(buffer);
    source = nil;
    return  result;
}