Integrity Error on ChangeKey desfire ev3

[amrin-hexondata]

Hi, I'm trying to change default aes key on keyNo = 0, to a different aes key. However, I keep getting 

0x1E integrity error on sending the command, which i think indicates wrong crc.

I wrote in javascript. This is my crc32 calculation function

static crc32 = (input) => {
        const crcTable = new Array(256);
        for (let i = 0; i < 256; i++) {
          let c = i;
          for (let j = 0; j < 8; j++) {
            c = ((c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
          }
          crcTable[i] = c >>> 0;
        }
      
        let crc = 0 ^ (-1);
      
        for (let i = 0; i < input.length; i++) {
          crc = (crc >>>  ^ crcTable[(crc ^ input.charCodeAt(i)) & 0xFF];
        }
      
        crc = crc ^ (-1);  
        // Convert the integer to an array of bytes  
        const crcBytes = [];  for (let i = 0; i < 4; i++) { 
            crcBytes.push((crc >>> (i * 8)) & 0xFF);  
        }  
        
        return crcBytes.reverse();
    }​

From my understanding, CRC is calculated on Cmd + keyNo + (newKey xor oldkey) + keyversion. Something like this.

let data_to_crc = cmd.concat(_keyNo).concat(_newKey).concat(_keyVersion);
let data_to_crc_string = DesfireUtils.getHexFromDecArray(data_to_crc);
let crc_data = DesfireUtils.crc32(data_to_crc_string);

If I run my crc32 function on the data, i'd get the same result when using this online crc32 calculator 

Then cryptogram = newkey + keyversion + crc_data + padding

Then i send over <C4 00 Cryptogram>
Sending over encrypted cryptogram yields same result as not encrypted, 0x1E. encryption key is session key, iv = 0

[amrin-hexondata · Accepted solution]

Fixed the issue. The problem lies in CRC32 algorithm.
I used this C code and transcribed / implement it in javascript
http://www.rfidiot.org/crc32.c