com.jtransc.crypto.MD5 Maven / Gradle / Ivy
package com.jtransc.crypto;
/**
* @see "https://github.com/blueimp/JavaScript-MD5/blob/master/js/md5.js"
*/
@SuppressWarnings("PointlessArithmeticExpression")
final public class MD5 {
/*
* Add integers, wrapping at 2^32. This uses 16-bit operations internally
* to work around bugs in some JS interpreters.
*/
private int safe_add(int x, int y) {
return x + y;
}
/*
* Bitwise rotate a 32-bit number to the left.
*/
private int bit_rol(int num, int cnt) {
return (num << cnt) | (num >>> (32 - cnt));
}
/*
* These functions implement the four basic operations the algorithm uses.
*/
private int md5_cmn(int q, int a, int b, int x, int s, int t) {
return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}
private int md5_ff(int a, int b, int c, int d, int x, int s, int t) {
return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
private int md5_gg(int a, int b, int c, int d, int x, int s, int t) {
return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
private int md5_hh(int a, int b, int c, int d, int x, int s, int t) {
return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
private int md5_ii(int a, int b, int c, int d, int x, int s, int t) {
return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}
static public class State {
public int a;
public int b;
public int c;
public int d;
public State() {
reset();
}
public void reset() {
a = 1732584193;
b = -271733879;
c = -1732584194;
d = 271733878;
}
}
/*
* Calculate the MD5 of an array of little-endian words, and a bit length.
*/
public void binl_md5(int[] x, int len, State inout) {
/* append padding */
x[len >> 5] |= 0x80 << (len % 32);
x[(((len + 64) >>> 9) << 4) + 14] = len;
int i;
int olda;
int oldb;
int oldc;
int oldd;
int a = inout.a;
int b = inout.b;
int c = inout.c;
int d = inout.d;
for (i = 0; i < x.length; i += 16) {
olda = a;
oldb = b;
oldc = c;
oldd = d;
a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
}
inout.a = a;
inout.b = b;
inout.c = c;
inout.d = d;
}
///*
//* Convert an array of little-endian words to a string
//*/
//function binl2rstr (input) {
// var i
// var output = ''
// for (i = 0; i < input.length * 32; i += 8) {
// output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF)
// }
// return output
//}
//
///*
//* Convert a raw string to an array of little-endian words
//* Characters >255 have their high-byte silently ignored.
//*/
//function rstr2binl (input) {
// var i
// var output = []
// output[(input.length >> 2) - 1] = undefined
// for (i = 0; i < output.length; i += 1) {
// output[i] = 0
// }
// for (i = 0; i < input.length * 8; i += 8) {
// output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32)
// }
// return output
//}
//
///*
//* Calculate the MD5 of a raw string
//*/
//function rstr_md5 (s) {
// return binl2rstr(binl_md5(rstr2binl(s), s.length * 8))
//}
//
///*
//* Calculate the HMAC-MD5, of a key and some data (raw strings)
//*/
//function rstr_hmac_md5 (key, data) {
// var i
// var bkey = rstr2binl(key)
// var ipad = []
// var opad = []
// var hash
// ipad[15] = opad[15] = undefined
// if (bkey.length > 16) {
// bkey = binl_md5(bkey, key.length * 8)
// }
// for (i = 0; i < 16; i += 1) {
// ipad[i] = bkey[i] ^ 0x36363636
// opad[i] = bkey[i] ^ 0x5C5C5C5C
// }
// hash = binl_md5(ipad.concat(rstr2binl(data)), 512 + data.length * 8)
// return binl2rstr(binl_md5(opad.concat(hash), 512 + 128))
//}
//
///*
//* Convert a raw string to a hex string
//*/
//function rstr2hex (input) {
// var hex_tab = '0123456789abcdef'
// var output = ''
// var x
// var i
// for (i = 0; i < input.length; i += 1) {
// x = input.charCodeAt(i)
// output += hex_tab.charAt((x >>> 4) & 0x0F) +
// hex_tab.charAt(x & 0x0F)
// }
// return output
//}
//
///*
//* Encode a string as utf-8
//*/
//function str2rstr_utf8 (input) {
// return unescape(encodeURIComponent(input))
//}
//
///*
//* Take string arguments and return either raw or hex encoded strings
//*/
//function raw_md5 (s) {
// return rstr_md5(str2rstr_utf8(s))
//}
//function hex_md5 (s) {
// return rstr2hex(raw_md5(s))
//}
//function raw_hmac_md5 (k, d) {
// return rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d))
//}
//function hex_hmac_md5 (k, d) {
// return rstr2hex(raw_hmac_md5(k, d))
//}
//
//function md5 (string, key, raw) {
// if (!key) {
// if (!raw) {
// return hex_md5(string)
// }
// return raw_md5(string)
// }
// if (!raw) {
// return hex_hmac_md5(key, string)
// }
// return raw_hmac_md5(key, string)
//}
//
//if (typeof define === 'function' && define.amd) {
// define(function () {
// return md5
// })
//} else if (typeof module === 'object' && module.exports) {
// module.exports = md5
//} else {
// $.md5 = md5
//}
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