How can I create signature for AWS API in javascript using HmacSHA256?

Question

I\'m trying to make a request to AWS API using Javascript, and starting with their examples provided here

I\'m using hmac-sha256.js library for that too.

Here is

Answer 1

Finally it works now after I applied this answer

I was converting sig.toString() to base64 using a simple function, but using enc-base64.js library is converting wordArray to base64, I don't know what is the different really and I hope someone explain to me that :)

Here is a function I used:

function base64Encode(str) {
var CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var out = "", i = 0, len = str.length, c1, c2, c3;
while (i < len) {
    c1 = str.charCodeAt(i++) & 0xff;
    if (i == len) {
        out += CHARS.charAt(c1 >> 2);
        out += CHARS.charAt((c1 & 0x3) << 4);
        out += "==";
        break;
    }
    c2 = str.charCodeAt(i++);
    if (i == len) {
        out += CHARS.charAt(c1 >> 2);
        out += CHARS.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
        out += CHARS.charAt((c2 & 0xF) << 2);
        out += "=";
        break;
    }
    c3 = str.charCodeAt(i++);
    out += CHARS.charAt(c1 >> 2);
    out += CHARS.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
    out += CHARS.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6));
    out += CHARS.charAt(c3 & 0x3F);
}
return out;
}

Thanks.