Function core_sha1

example/bundle.js:452–492

(x, len)

 * Calculate the SHA-1 of an array of big-endian words, and a bit length
 */
	function core_sha1(x, len) 	{
		/* append padding */
		x[len >> 5] |= 0x80 << (24 - len % 32);
		x[((len + 64 >> 9) << 4) + 15] = len;

		var w = Array(80);
		var a = 1732584193;
		var b = -271733879;
		var c = -1732584194;
		var d = 271733878;
		var e = -1009589776;

		for (var i = 0; i < x.length; i += 16) {
			var olda = a;
			var oldb = b;
			var oldc = c;
			var oldd = d;
			var olde = e;

			for (var j = 0; j < 80; j++) {
				if (j < 16) { w[j] = x[i + j]; } else { w[j] = rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1); }
				var t = safe_add(
					safe_add(rol(a, 5), sha1_ft(j, b, c, d)),
					safe_add(safe_add(e, w[j]), sha1_kt(j))
				);
				e = d;
				d = c;
				c = rol(b, 30);
				b = a;
				a = t;
			}

			a = safe_add(a, olda);
			b = safe_add(b, oldb);
			c = safe_add(c, oldc);
			d = safe_add(d, oldd);
			e = safe_add(e, olde);
		}
		return Array(a, b, c, d, e);

	}

	/*
 * Perform the appropriate triplet combination function for the current