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-/*
- * 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 = new Array(80);
- var a = 1732584193;
- var b = -271733879;
- var c = -1732584194;
- var d = 271733878;
- var e = -1009589776;
-
- var i, j, t, olda, oldb, oldc, oldd, olde;
- for (i = 0; i < x.length; i += 16)
- {
- olda = a;
- oldb = b;
- oldc = c;
- oldd = d;
- olde = e;
-
- for (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); }
- 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 [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 = new Array(16), opad = new 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 = [];
- 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 = "";
- var triplet, j;
- for (var i = 0; i < binarray.length * 4; i += 3)
- {
- 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 (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;
-}