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up vote -1 down vote favorite

I coded my application in java in a first time and I should now coded it in javascript and I have some problems in the handling of string and arraybytes in javascript and recoding methods of conversion in both directions. Here is my java code:

    public String VerifyPIN(String PIN, String successCb, String errorCb)   {
        byte[] AID = new byte[] {(byte)0xA0,(byte)0x00,(byte)0x00,(byte)0x00,(byte)0x04,(byte)0x10,(byte)0x10,(byte)0x11};
        byte[] tmpPIN = new byte[] {(byte)0x00, (byte)0x20, (byte)0x00, (byte)0x80, (byte)0x08, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00};
        System.arraycopy(PIN.getBytes(), 0, tmpPIN, 5, PIN.getBytes().length);

        byte[] output = exchange(AID, tmpPIN);
        String result = StringUtils.bytesToString(output);

        if ("90 00".equals(result.trim())) {
            //onSuccess()
        } else {
            //onError
        }

        return result.trim();
    }

    public String bytesToString(byte[] bytes) {
        if (bytes != null)
        {
            StringBuffer sb = new StringBuffer();
            for (byte b : bytes) {
                sb.append(String.format("%02x ", b & 0xFF));
            }
            return sb.toString();
        }
        else {
            return "N/A";
        }

    }

So how can I convert these two methods bytesToString and VerifyPIN to javascript.

thank you in advance

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1  
Riahi - SO it not a "write my code for free" service. We will help you with problems you encounter in doing your own programming, but we won't do your job for you. –  Stephen C Jul 18 '13 at 10:06
    
@StephenC: let's wait some minute, some haxxor will –  Andrea Ligios Jul 18 '13 at 10:11
    
@AndreaLigios - No. Lets not wait a minute. This is NOT how SO should be used. –  Stephen C Jul 18 '13 at 10:33
    
@StephenC: -1 for not getting sarcasm –  Andrea Ligios Jul 18 '13 at 11:38
    
@AndreaLigios: -1 for expecting people to read your tone of voice from ASCII text. -1 for not using the normal smiley convention to indicate "humour". –  Stephen C Jul 18 '13 at 13:19
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closed as off-topic by Stephen C, Andreas_D, Tony, Sindre Sorhus, Aschratt Jul 18 '13 at 11:53

This question appears to be off-topic. The users who voted to close gave this specific reason:

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2 Answers

up vote 3 down vote

You can use

function string2Bin(str) {
  var result = [];
  for (var i = 0; i < str.length; i++) {
    result.push(str.charCodeAt(i));
  }
  return result;
}

function bin2String(array) {
  return String.fromCharCode.apply(String, array);
}

string2Bin('foo'); // [102, 111, 111]
bin2String(string2Bin('foo')) === 'foo'; // true

Good luck

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up vote 0 down vote

For the second method, here is the conversion:

function bytesToString(bytes) {
  var result = "";
  for (var i = 0; i < bytes.length; i++) {
    result += String.fromCharCode(parseInt(bytes[i], 2));
  }
  return result;
}
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