From 40fd75696b548d18057a289e849be98dd2af12dd Mon Sep 17 00:00:00 2001
From: ausiv4 <ausiv4@eb105b4a-77de-11de-a249-6bf219df57d5>
Date: Fri, 24 Jul 2009 13:57:46 +0000
Subject: Not what I meant to do...

---
 proper-random/javascript/SHA256.js | 127 +++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 proper-random/javascript/SHA256.js

(limited to 'proper-random/javascript/SHA256.js')

diff --git a/proper-random/javascript/SHA256.js b/proper-random/javascript/SHA256.js
new file mode 100644
index 0000000..1a852c0
--- /dev/null
+++ b/proper-random/javascript/SHA256.js
@@ -0,0 +1,127 @@
+/**
+*
+*  Secure Hash Algorithm (SHA256)
+*  http://www.webtoolkit.info/
+*
+*  Original code by Angel Marin, Paul Johnston.
+*
+**/
+ 
+function SHA256(s){
+ 
+	var chrsz   = 8;
+	var hexcase = 0;
+ 
+	function safe_add (x, y) {
+		var lsw = (x & 0xFFFF) + (y & 0xFFFF);
+		var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+		return (msw << 16) | (lsw & 0xFFFF);
+	}
+ 
+	function S (X, n) { return ( X >>> n ) | (X << (32 - n)); }
+	function R (X, n) { return ( X >>> n ); }
+	function Ch(x, y, z) { return ((x & y) ^ ((~x) & z)); }
+	function Maj(x, y, z) { return ((x & y) ^ (x & z) ^ (y & z)); }
+	function Sigma0256(x) { return (S(x, 2) ^ S(x, 13) ^ S(x, 22)); }
+	function Sigma1256(x) { return (S(x, 6) ^ S(x, 11) ^ S(x, 25)); }
+	function Gamma0256(x) { return (S(x, 7) ^ S(x, 18) ^ R(x, 3)); }
+	function Gamma1256(x) { return (S(x, 17) ^ S(x, 19) ^ R(x, 10)); }
+ 
+	function core_sha256 (m, l) {
+		var K = new Array(0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0xFC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x6CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2);
+		var HASH = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
+		var W = new Array(64);
+		var a, b, c, d, e, f, g, h, i, j;
+		var T1, T2;
+ 
+		m[l >> 5] |= 0x80 << (24 - l % 32);
+		m[((l + 64 >> 9) << 4) + 15] = l;
+ 
+		for ( var i = 0; i<m.length; i+=16 ) {
+			a = HASH[0];
+			b = HASH[1];
+			c = HASH[2];
+			d = HASH[3];
+			e = HASH[4];
+			f = HASH[5];
+			g = HASH[6];
+			h = HASH[7];
+ 
+			for ( var j = 0; j<64; j++) {
+				if (j < 16) W[j] = m[j + i];
+				else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
+ 
+				T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
+				T2 = safe_add(Sigma0256(a), Maj(a, b, c));
+ 
+				h = g;
+				g = f;
+				f = e;
+				e = safe_add(d, T1);
+				d = c;
+				c = b;
+				b = a;
+				a = safe_add(T1, T2);
+			}
+ 
+			HASH[0] = safe_add(a, HASH[0]);
+			HASH[1] = safe_add(b, HASH[1]);
+			HASH[2] = safe_add(c, HASH[2]);
+			HASH[3] = safe_add(d, HASH[3]);
+			HASH[4] = safe_add(e, HASH[4]);
+			HASH[5] = safe_add(f, HASH[5]);
+			HASH[6] = safe_add(g, HASH[6]);
+			HASH[7] = safe_add(h, HASH[7]);
+		}
+		return HASH;
+	}
+ 
+	function str2binb (str) {
+		var bin = Array();
+		var mask = (1 << chrsz) - 1;
+		for(var i = 0; i < str.length * chrsz; i += chrsz) {
+			bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - i%32);
+		}
+		return bin;
+	}
+ 
+	function Utf8Encode(string) {
+		string = string.replace(/\r\n/g,"\n");
+		var utftext = "";
+ 
+		for (var n = 0; n < string.length; n++) {
+ 
+			var c = string.charCodeAt(n);
+ 
+			if (c < 128) {
+				utftext += String.fromCharCode(c);
+			}
+			else if((c > 127) && (c < 2048)) {
+				utftext += String.fromCharCode((c >> 6) | 192);
+				utftext += String.fromCharCode((c & 63) | 128);
+			}
+			else {
+				utftext += String.fromCharCode((c >> 12) | 224);
+				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
+				utftext += String.fromCharCode((c & 63) | 128);
+			}
+ 
+		}
+ 
+		return utftext;
+	}
+ 
+	function binb2hex (binarray) {
+		var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
+		var str = "";
+		for(var i = 0; i < binarray.length * 4; i++) {
+			str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
+			hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8  )) & 0xF);
+		}
+		return str;
+	}
+ 
+	s = Utf8Encode(s);
+	return binb2hex(core_sha256(str2binb(s), s.length * chrsz));
+ 
+}
-- 
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