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/* |
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* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message |
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* Digest Algorithm, as defined in RFC 1321. |
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* Version 2.1 Copyright (C) Paul Johnston 1999 - 2002. |
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* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet |
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* Distributed under the BSD License |
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* See http://pajhome.org.uk/crypt/md5 for more info.
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*/ |
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/* |
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* Configurable variables. You may need to tweak these to be compatible with |
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* the server-side, but the defaults work in most cases. |
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*/ |
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var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */ |
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var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */ |
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var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */ |
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/* |
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* These are the functions you'll usually want to call |
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* They take string arguments and return either hex or base-64 encoded strings |
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*/ |
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function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));} |
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function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));} |
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function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));} |
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function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); } |
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function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); } |
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function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); } |
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/* |
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* Perform a simple self-test to see if the VM is working |
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*/ |
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function md5_vm_test() |
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{ |
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return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72"; |
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} |
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/* |
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* Calculate the MD5 of an array of little-endian words, and a bit length |
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*/ |
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function core_md5(x, len) |
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{ |
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/* append padding */ |
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x[len >> 5] |= 0x80 << ((len) % 32); |
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x[(((len + 64) >>> 9) << 4) + 14] = len; |
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var a = 1732584193; |
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var b = -271733879; |
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var c = -1732584194; |
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var d = 271733878; |
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for(var i = 0; i < x.length; i += 16) |
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{ |
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var olda = a; |
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var oldb = b; |
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var oldc = c; |
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var oldd = d; |
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a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936); |
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d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586); |
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c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819); |
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b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330); |
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a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897); |
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d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426); |
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c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341); |
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b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983); |
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a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416); |
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d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417); |
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c = md5_ff(c, d, a, b, x[i+10], 17, -42063); |
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b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162); |
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a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682); |
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d = md5_ff(d, a, b, c, x[i+13], 12, -40341101); |
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c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290); |
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b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329); |
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a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510); |
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d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632); |
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c = md5_gg(c, d, a, b, x[i+11], 14, 643717713); |
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b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302); |
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a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691); |
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d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083); |
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c = md5_gg(c, d, a, b, x[i+15], 14, -660478335); |
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b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848); |
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a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438); |
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d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690); |
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c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961); |
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b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501); |
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a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467); |
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d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784); |
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c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473); |
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b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734); |
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a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558); |
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d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463); |
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c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562); |
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b = md5_hh(b, c, d, a, x[i+14], 23, -35309556); |
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a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060); |
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d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353); |
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c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632); |
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b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640); |
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a = md5_hh(a, b, c, d, x[i+13], 4 , 681279174); |
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d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222); |
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c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979); |
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b = md5_hh(b, c, d, a, x[i+ 6], 23, 76029189); |
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a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487); |
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d = md5_hh(d, a, b, c, x[i+12], 11, -421815835); |
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c = md5_hh(c, d, a, b, x[i+15], 16, 530742520); |
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b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651); |
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a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844); |
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d = md5_ii(d, a, b, c, x[i+ 7], 10, 1126891415); |
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c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905); |
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b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055); |
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a = md5_ii(a, b, c, d, x[i+12], 6 , 1700485571); |
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d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606); |
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c = md5_ii(c, d, a, b, x[i+10], 15, -1051523); |
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b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799); |
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a = md5_ii(a, b, c, d, x[i+ 8], 6 , 1873313359); |
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d = md5_ii(d, a, b, c, x[i+15], 10, -30611744); |
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c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380); |
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b = md5_ii(b, c, d, a, x[i+13], 21, 1309151649); |
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a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070); |
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d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379); |
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c = md5_ii(c, d, a, b, x[i+ 2], 15, 718787259); |
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b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551); |
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a = safe_add(a, olda); |
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b = safe_add(b, oldb); |
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c = safe_add(c, oldc); |
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d = safe_add(d, oldd); |
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} |
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return Array(a, b, c, d); |
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} |
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/* |
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* These functions implement the four basic operations the algorithm uses. |
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*/ |
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function md5_cmn(q, a, b, x, s, t) |
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{ |
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return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b); |
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} |
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function md5_ff(a, b, c, d, x, s, t) |
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{ |
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return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t); |
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} |
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function md5_gg(a, b, c, d, x, s, t) |
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{ |
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return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t); |
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} |
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function md5_hh(a, b, c, d, x, s, t) |
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{ |
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return md5_cmn(b ^ c ^ d, a, b, x, s, t); |
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} |
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function md5_ii(a, b, c, d, x, s, t) |
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{ |
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return md5_cmn(c ^ (b | (~d)), a, b, x, s, t); |
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} |
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/* |
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* Calculate the HMAC-MD5, of a key and some data |
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*/ |
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function core_hmac_md5(key, data) |
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{ |
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var bkey = str2binl(key); |
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if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz); |
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var ipad = Array(16), opad = Array(16); |
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for(var i = 0; i < 16; i++) |
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{ |
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ipad[i] = bkey[i] ^ 0x36363636; |
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opad[i] = bkey[i] ^ 0x5C5C5C5C; |
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} |
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var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz); |
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return core_md5(opad.concat(hash), 512 + 128); |
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} |
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/* |
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* Add integers, wrapping at 2^32. This uses 16-bit operations internally |
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* to work around bugs in some JS interpreters. |
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*/ |
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function safe_add(x, y) |
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{ |
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var lsw = (x & 0xFFFF) + (y & 0xFFFF); |
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var msw = (x >> 16) + (y >> 16) + (lsw >> 16); |
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return (msw << 16) | (lsw & 0xFFFF); |
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} |
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/* |
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* Bitwise rotate a 32-bit number to the left. |
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*/ |
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function bit_rol(num, cnt) |
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{ |
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return (num << cnt) | (num >>> (32 - cnt)); |
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} |
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/* |
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* Convert a string to an array of little-endian words |
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* If chrsz is ASCII, characters >255 have their hi-byte silently ignored. |
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*/ |
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function str2binl(str) |
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{ |
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var bin = Array(); |
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var mask = (1 << chrsz) - 1; |
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for(var i = 0; i < str.length * chrsz; i += chrsz) |
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bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32); |
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return bin; |
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} |
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/* |
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* Convert an array of little-endian words to a string |
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*/ |
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function binl2str(bin) |
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{ |
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var str = ""; |
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var mask = (1 << chrsz) - 1; |
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for(var i = 0; i < bin.length * 32; i += chrsz) |
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str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask); |
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return str; |
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} |
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/* |
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* Convert an array of little-endian words to a hex string. |
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*/ |
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function binl2hex(binarray) |
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{ |
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var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef"; |
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var str = ""; |
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for(var i = 0; i < binarray.length * 4; i++) |
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{ |
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str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) + |
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hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF); |
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} |
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return str; |
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} |
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/* |
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* Convert an array of little-endian words to a base-64 string |
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*/ |
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function binl2b64(binarray) |
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{ |
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var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
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var str = ""; |
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for(var i = 0; i < binarray.length * 4; i += 3) |
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{ |
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var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xFF) << 16) |
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| (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 ) |
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| ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF); |
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for(var j = 0; j < 4; j++) |
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{ |
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if(i * 8 + j * 6 > binarray.length * 32) str += b64pad; |
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else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F); |
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} |
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} |
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return str; |
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} |
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