Release 5.2
diff --git a/src/js/sha1.js b/src/js/sha1.js
new file mode 100644
index 0000000..1b55982
--- /dev/null
+++ b/src/js/sha1.js
@@ -0,0 +1,202 @@
+/*
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
+ * in FIPS PUB 180-1
+ * Version 2.1a Copyright Paul Johnston 2000 - 2002.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for details.
+ */
+
+/*
+ * Configurable variables. You may need to tweak these to be compatible with
+ * the server-side, but the defaults work in most cases.
+ */
+var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
+var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */
+var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */
+
+/*
+ * These are the functions you'll usually want to call
+ * They take string arguments and return either hex or base-64 encoded strings
+ */
+function hex_sha1(s){return binb2hex(core_sha1(str2binb(s),s.length * chrsz));}
+function b64_sha1(s){return binb2b64(core_sha1(str2binb(s),s.length * chrsz));}
+function str_sha1(s){return binb2str(core_sha1(str2binb(s),s.length * chrsz));}
+function hex_hmac_sha1(key, data){ return binb2hex(core_hmac_sha1(key, data));}
+function b64_hmac_sha1(key, data){ return binb2b64(core_hmac_sha1(key, data));}
+function str_hmac_sha1(key, data){ return binb2str(core_hmac_sha1(key, data));}
+
+/*
+ * Perform a simple self-test to see if the VM is working
+ */
+function sha1_vm_test()
+{
+ return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
+}
+
+/*
+ * 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
+ * iteration
+ */
+function sha1_ft(t, b, c, d)
+{
+ if(t < 20) return (b & c) | ((~b) & d);
+ if(t < 40) return b ^ c ^ d;
+ if(t < 60) return (b & c) | (b & d) | (c & d);
+ return b ^ c ^ d;
+}
+
+/*
+ * Determine the appropriate additive constant for the current iteration
+ */
+function sha1_kt(t)
+{
+ return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
+ (t < 60) ? -1894007588 : -899497514;
+}
+
+/*
+ * Calculate the HMAC-SHA1 of a key and some data
+ */
+function core_hmac_sha1(key, data)
+{
+ var bkey = str2binb(key);
+ if(bkey.length > 16) bkey = core_sha1(bkey, key.length * chrsz);
+
+ var ipad = Array(16), opad = Array(16);
+ for(var i = 0; i < 16; i++)
+ {
+ ipad[i] = bkey[i] ^ 0x36363636;
+ opad[i] = bkey[i] ^ 0x5C5C5C5C;
+ }
+
+ var hash = core_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz);
+ return core_sha1(opad.concat(hash), 512 + 160);
+}
+
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+function safe_add(x, y)
+{
+ var lsw = (x & 0xFFFF) + (y & 0xFFFF);
+ var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+ return (msw << 16) | (lsw & 0xFFFF);
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function rol(num, cnt)
+{
+ return (num << cnt) | (num >>> (32 - cnt));
+}
+
+/*
+ * Convert an 8-bit or 16-bit string to an array of big-endian words
+ * In 8-bit function, characters >255 have their hi-byte silently ignored.
+ */
+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) << (32 - chrsz - i%32);
+ return bin;
+}
+
+/*
+ * Convert an array of big-endian words to a string
+ */
+function binb2str(bin)
+{
+ var str = "";
+ var mask = (1 << chrsz) - 1;
+ for(var i = 0; i < bin.length * 32; i += chrsz)
+ str += String.fromCharCode((bin[i>>5] >>> (32 - chrsz - i%32)) & mask);
+ return str;
+}
+
+/*
+ * Convert an array of big-endian words to a hex string.
+ */
+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;
+}
+
+/*
+ * Convert an array of big-endian words to a base-64 string
+ */
+function binb2b64(binarray)
+{
+ var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ var str = "";
+ for(var i = 0; i < binarray.length * 4; i += 3)
+ {
+ var triplet = (((binarray[i >> 2] >> 8 * (3 - i %4)) & 0xFF) << 16)
+ | (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xFF) << 8 )
+ | ((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xFF);
+ for(var j = 0; j < 4; j++)
+ {
+ if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
+ else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
+ }
+ }
+ return str;
+}