1 files changed, 174 insertions, 0 deletions
diff --git a/srp/SHA1.js b/srp/SHA1.js
new file mode 100644
index 0000000..e772cbe
--- /dev/null
+++ b/srp/SHA1.js
@@ -0,0 +1,174 @@
+/**
+*
+*  Secure Hash Algorithm (SHA1)
+*  http://www.webtoolkit.info/
+*
+**/
+ 
+function SHA1 (msg) {
+ 
+	function rotate_left(n,s) {
+		var t4 = ( n<<s ) | (n>>>(32-s));
+		return t4;
+	};
+ 
+	function lsb_hex(val) {
+		var str="";
+		var i;
+		var vh;
+		var vl;
+ 
+		for( i=0; i<=6; i+=2 ) {
+			vh = (val>>>(i*4+4))&0x0f;
+			vl = (val>>>(i*4))&0x0f;
+			str += vh.toString(16) + vl.toString(16);
+		}
+		return str;
+	};
+ 
+	function cvt_hex(val) {
+		var str="";
+		var i;
+		var v;
+ 
+		for( i=7; i>=0; i-- ) {
+			v = (val>>>(i*4))&0x0f;
+			str += v.toString(16);
+		}
+		return str;
+	};
+ 
+ 
+	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;
+	};
+ 
+	var blockstart;
+	var i, j;
+	var W = new Array(80);
+	var H0 = 0x67452301;
+	var H1 = 0xEFCDAB89;
+	var H2 = 0x98BADCFE;
+	var H3 = 0x10325476;
+	var H4 = 0xC3D2E1F0;
+	var A, B, C, D, E;
+	var temp;
+ 
+	msg = Utf8Encode(msg);
+ 
+	var msg_len = msg.length;
+ 
+	var word_array = new Array();
+	for( i=0; i<msg_len-3; i+=4 ) {
+		j = msg.charCodeAt(i)<<24 | msg.charCodeAt(i+1)<<16 |
+		msg.charCodeAt(i+2)<<8 | msg.charCodeAt(i+3);
+		word_array.push( j );
+	}
+ 
+	switch( msg_len % 4 ) {
+		case 0:
+			i = 0x080000000;
+		break;
+		case 1:
+			i = msg.charCodeAt(msg_len-1)<<24 | 0x0800000;
+		break;
+ 
+		case 2:
+			i = msg.charCodeAt(msg_len-2)<<24 | msg.charCodeAt(msg_len-1)<<16 | 0x08000;
+		break;
+ 
+		case 3:
+			i = msg.charCodeAt(msg_len-3)<<24 | msg.charCodeAt(msg_len-2)<<16 | msg.charCodeAt(msg_len-1)<<8	| 0x80;
+		break;
+	}
+ 
+	word_array.push( i );
+ 
+	while( (word_array.length % 16) != 14 ) word_array.push( 0 );
+ 
+	word_array.push( msg_len>>>29 );
+	word_array.push( (msg_len<<3)&0x0ffffffff );
+ 
+ 
+	for ( blockstart=0; blockstart<word_array.length; blockstart+=16 ) {
+ 
+		for( i=0; i<16; i++ ) W[i] = word_array[blockstart+i];
+		for( i=16; i<=79; i++ ) W[i] = rotate_left(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);
+ 
+		A = H0;
+		B = H1;
+		C = H2;
+		D = H3;
+		E = H4;
+ 
+		for( i= 0; i<=19; i++ ) {
+			temp = (rotate_left(A,5) + ((B&C) | (~B&D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;
+			E = D;
+			D = C;
+			C = rotate_left(B,30);
+			B = A;
+			A = temp;
+		}
+ 
+		for( i=20; i<=39; i++ ) {
+			temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;
+			E = D;
+			D = C;
+			C = rotate_left(B,30);
+			B = A;
+			A = temp;
+		}
+ 
+		for( i=40; i<=59; i++ ) {
+			temp = (rotate_left(A,5) + ((B&C) | (B&D) | (C&D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;
+			E = D;
+			D = C;
+			C = rotate_left(B,30);
+			B = A;
+			A = temp;
+		}
+ 
+		for( i=60; i<=79; i++ ) {
+			temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff;
+			E = D;
+			D = C;
+			C = rotate_left(B,30);
+			B = A;
+			A = temp;
+		}
+ 
+		H0 = (H0 + A) & 0x0ffffffff;
+		H1 = (H1 + B) & 0x0ffffffff;
+		H2 = (H2 + C) & 0x0ffffffff;
+		H3 = (H3 + D) & 0x0ffffffff;
+		H4 = (H4 + E) & 0x0ffffffff;
+ 
+	}
+ 
+	var temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4);
+ 
+	return temp.toLowerCase();
+ 
+}