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497 lines
16 KiB
JavaScript
497 lines
16 KiB
JavaScript
/*
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* A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined
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* in FIPS 180-2
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* Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
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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 details.
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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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/*
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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_sha512(s) { return rstr2hex(rstr_sha512(str2rstr_utf8(s))); }
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function b64_sha512(s) { return rstr2b64(rstr_sha512(str2rstr_utf8(s))); }
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function any_sha512(s, e) { return rstr2any(rstr_sha512(str2rstr_utf8(s)), e);}
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function hex_hmac_sha512(k, d)
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{ return rstr2hex(rstr_hmac_sha512(str2rstr_utf8(k), str2rstr_utf8(d))); }
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function b64_hmac_sha512(k, d)
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{ return rstr2b64(rstr_hmac_sha512(str2rstr_utf8(k), str2rstr_utf8(d))); }
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function any_hmac_sha512(k, d, e)
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{ return rstr2any(rstr_hmac_sha512(str2rstr_utf8(k), str2rstr_utf8(d)), e);}
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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 sha512_vm_test()
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{
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return hex_sha512("abc").toLowerCase() ==
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"ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a" +
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"2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f";
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}
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/*
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* Calculate the SHA-512 of a raw string
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*/
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function rstr_sha512(s)
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{
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return binb2rstr(binb_sha512(rstr2binb(s), s.length * 8));
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}
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/*
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* Calculate the HMAC-SHA-512 of a key and some data (raw strings)
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*/
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function rstr_hmac_sha512(key, data)
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{
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var bkey = rstr2binb(key);
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if(bkey.length > 32) bkey = binb_sha512(bkey, key.length * 8);
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var ipad = Array(32), opad = Array(32);
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for(var i = 0; i < 32; 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 = binb_sha512(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
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return binb2rstr(binb_sha512(opad.concat(hash), 1024 + 512));
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}
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/*
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* Convert a raw string to a hex string
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*/
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function rstr2hex(input)
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{
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try { hexcase } catch(e) { hexcase=0; }
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var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
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var output = "";
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var x;
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for(var i = 0; i < input.length; i++)
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{
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x = input.charCodeAt(i);
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output += hex_tab.charAt((x >>> 4) & 0x0F)
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+ hex_tab.charAt( x & 0x0F);
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}
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return output;
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}
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/*
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* Convert a raw string to a base-64 string
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*/
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function rstr2b64(input)
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{
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try { b64pad } catch(e) { b64pad=''; }
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var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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var output = "";
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var len = input.length;
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for(var i = 0; i < len; i += 3)
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{
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var triplet = (input.charCodeAt(i) << 16)
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| (i + 1 < len ? input.charCodeAt(i+1) << 8 : 0)
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| (i + 2 < len ? input.charCodeAt(i+2) : 0);
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for(var j = 0; j < 4; j++)
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{
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if(i * 8 + j * 6 > input.length * 8) output += b64pad;
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else output += tab.charAt((triplet >>> 6*(3-j)) & 0x3F);
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}
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}
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return output;
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}
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/*
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* Convert a raw string to an arbitrary string encoding
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*/
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function rstr2any(input, encoding)
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{
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var divisor = encoding.length;
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var i, j, q, x, quotient;
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/* Convert to an array of 16-bit big-endian values, forming the dividend */
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var dividend = Array(Math.ceil(input.length / 2));
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for(i = 0; i < dividend.length; i++)
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{
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dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
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}
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/*
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* Repeatedly perform a long division. The binary array forms the dividend,
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* the length of the encoding is the divisor. Once computed, the quotient
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* forms the dividend for the next step. All remainders are stored for later
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* use.
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*/
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var full_length = Math.ceil(input.length * 8 /
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(Math.log(encoding.length) / Math.log(2)));
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var remainders = Array(full_length);
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for(j = 0; j < full_length; j++)
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{
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quotient = Array();
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x = 0;
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for(i = 0; i < dividend.length; i++)
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{
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x = (x << 16) + dividend[i];
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q = Math.floor(x / divisor);
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x -= q * divisor;
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if(quotient.length > 0 || q > 0)
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quotient[quotient.length] = q;
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}
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remainders[j] = x;
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dividend = quotient;
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}
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/* Convert the remainders to the output string */
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var output = "";
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for(i = remainders.length - 1; i >= 0; i--)
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output += encoding.charAt(remainders[i]);
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return output;
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}
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/*
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* Encode a string as utf-8.
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* For efficiency, this assumes the input is valid utf-16.
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*/
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function str2rstr_utf8(input)
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{
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var output = "";
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var i = -1;
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var x, y;
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while(++i < input.length)
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{
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/* Decode utf-16 surrogate pairs */
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x = input.charCodeAt(i);
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y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
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if(0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF)
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{
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x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
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i++;
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}
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/* Encode output as utf-8 */
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if(x <= 0x7F)
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output += String.fromCharCode(x);
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else if(x <= 0x7FF)
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output += String.fromCharCode(0xC0 | ((x >>> 6 ) & 0x1F),
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0x80 | ( x & 0x3F));
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else if(x <= 0xFFFF)
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output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
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0x80 | ((x >>> 6 ) & 0x3F),
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0x80 | ( x & 0x3F));
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else if(x <= 0x1FFFFF)
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output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
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0x80 | ((x >>> 12) & 0x3F),
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0x80 | ((x >>> 6 ) & 0x3F),
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0x80 | ( x & 0x3F));
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}
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return output;
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}
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/*
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* Encode a string as utf-16
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*/
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function str2rstr_utf16le(input)
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{
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var output = "";
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for(var i = 0; i < input.length; i++)
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output += String.fromCharCode( input.charCodeAt(i) & 0xFF,
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(input.charCodeAt(i) >>> 8) & 0xFF);
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return output;
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}
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function str2rstr_utf16be(input)
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{
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var output = "";
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for(var i = 0; i < input.length; i++)
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output += String.fromCharCode((input.charCodeAt(i) >>> 8) & 0xFF,
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input.charCodeAt(i) & 0xFF);
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return output;
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}
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/*
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* Convert a raw string to an array of big-endian words
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* Characters >255 have their high-byte silently ignored.
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*/
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function rstr2binb(input)
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{
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var output = Array(input.length >> 2);
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for(var i = 0; i < output.length; i++)
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output[i] = 0;
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for(var i = 0; i < input.length * 8; i += 8)
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output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
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return output;
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}
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/*
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* Convert an array of big-endian words to a string
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*/
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function binb2rstr(input)
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{
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var output = "";
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for(var i = 0; i < input.length * 32; i += 8)
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output += String.fromCharCode((input[i>>5] >>> (24 - i % 32)) & 0xFF);
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return output;
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}
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/*
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* Calculate the SHA-512 of an array of big-endian dwords, and a bit length
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*/
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var sha512_k;
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function binb_sha512(x, len)
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{
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if(sha512_k == undefined)
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{
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//SHA512 constants
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sha512_k = new Array(
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new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd),
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new int64(-1245643825, -330482897), new int64(-373957723, -2121671748),
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new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031),
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new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736),
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new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe),
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new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302),
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new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1),
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new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428),
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new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3),
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new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65),
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new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483),
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new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459),
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new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210),
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new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340),
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new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395),
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new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70),
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new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926),
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new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473),
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new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8),
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new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b),
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new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023),
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new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30),
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new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910),
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new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8),
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new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53),
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new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016),
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new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893),
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new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397),
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new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60),
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new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec),
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new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047),
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new int64(-1090935817, -1295615723), new int64(-965641998, -479046869),
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new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207),
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new int64(-354779690, -840897762), new int64(-176337025, -294727304),
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new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026),
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new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b),
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new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493),
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new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620),
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new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430),
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new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817));
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}
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//Initial hash values
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var H = new Array(
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new int64(0x6a09e667, -205731576),
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new int64(-1150833019, -2067093701),
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new int64(0x3c6ef372, -23791573),
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new int64(-1521486534, 0x5f1d36f1),
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new int64(0x510e527f, -1377402159),
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new int64(-1694144372, 0x2b3e6c1f),
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new int64(0x1f83d9ab, -79577749),
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new int64(0x5be0cd19, 0x137e2179));
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var T1 = new int64(0, 0),
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T2 = new int64(0, 0),
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a = new int64(0,0),
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b = new int64(0,0),
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c = new int64(0,0),
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d = new int64(0,0),
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e = new int64(0,0),
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f = new int64(0,0),
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g = new int64(0,0),
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h = new int64(0,0),
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//Temporary variables not specified by the document
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s0 = new int64(0, 0),
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s1 = new int64(0, 0),
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Ch = new int64(0, 0),
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Maj = new int64(0, 0),
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r1 = new int64(0, 0),
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r2 = new int64(0, 0),
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r3 = new int64(0, 0);
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var j, i;
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var W = new Array(80);
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for(i=0; i<80; i++)
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W[i] = new int64(0, 0);
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// append padding to the source string. The format is described in the FIPS.
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x[len >> 5] |= 0x80 << (24 - (len & 0x1f));
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x[((len + 128 >> 10)<< 5) + 31] = len;
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for(i = 0; i<x.length; i+=32) //32 dwords is the block size
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{
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int64copy(a, H[0]);
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int64copy(b, H[1]);
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int64copy(c, H[2]);
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int64copy(d, H[3]);
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int64copy(e, H[4]);
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int64copy(f, H[5]);
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int64copy(g, H[6]);
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int64copy(h, H[7]);
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for(j=0; j<16; j++)
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{
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W[j].h = x[i + 2*j];
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W[j].l = x[i + 2*j + 1];
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}
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for(j=16; j<80; j++)
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{
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//sigma1
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int64rrot(r1, W[j-2], 19);
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int64revrrot(r2, W[j-2], 29);
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int64shr(r3, W[j-2], 6);
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s1.l = r1.l ^ r2.l ^ r3.l;
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s1.h = r1.h ^ r2.h ^ r3.h;
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//sigma0
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int64rrot(r1, W[j-15], 1);
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int64rrot(r2, W[j-15], 8);
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int64shr(r3, W[j-15], 7);
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s0.l = r1.l ^ r2.l ^ r3.l;
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s0.h = r1.h ^ r2.h ^ r3.h;
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int64add4(W[j], s1, W[j-7], s0, W[j-16]);
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}
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for(j = 0; j < 80; j++)
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{
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//Ch
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Ch.l = (e.l & f.l) ^ (~e.l & g.l);
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Ch.h = (e.h & f.h) ^ (~e.h & g.h);
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//Sigma1
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int64rrot(r1, e, 14);
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int64rrot(r2, e, 18);
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int64revrrot(r3, e, 9);
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s1.l = r1.l ^ r2.l ^ r3.l;
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s1.h = r1.h ^ r2.h ^ r3.h;
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//Sigma0
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int64rrot(r1, a, 28);
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int64revrrot(r2, a, 2);
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int64revrrot(r3, a, 7);
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s0.l = r1.l ^ r2.l ^ r3.l;
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s0.h = r1.h ^ r2.h ^ r3.h;
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//Maj
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Maj.l = (a.l & b.l) ^ (a.l & c.l) ^ (b.l & c.l);
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Maj.h = (a.h & b.h) ^ (a.h & c.h) ^ (b.h & c.h);
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int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
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int64add(T2, s0, Maj);
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int64copy(h, g);
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int64copy(g, f);
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int64copy(f, e);
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int64add(e, d, T1);
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int64copy(d, c);
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int64copy(c, b);
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int64copy(b, a);
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int64add(a, T1, T2);
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}
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int64add(H[0], H[0], a);
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int64add(H[1], H[1], b);
|
|
int64add(H[2], H[2], c);
|
|
int64add(H[3], H[3], d);
|
|
int64add(H[4], H[4], e);
|
|
int64add(H[5], H[5], f);
|
|
int64add(H[6], H[6], g);
|
|
int64add(H[7], H[7], h);
|
|
}
|
|
|
|
//represent the hash as an array of 32-bit dwords
|
|
var hash = new Array(16);
|
|
for(i=0; i<8; i++)
|
|
{
|
|
hash[2*i] = H[i].h;
|
|
hash[2*i + 1] = H[i].l;
|
|
}
|
|
return hash;
|
|
}
|
|
|
|
//A constructor for 64-bit numbers
|
|
function int64(h, l)
|
|
{
|
|
this.h = h;
|
|
this.l = l;
|
|
//this.toString = int64toString;
|
|
}
|
|
|
|
//Copies src into dst, assuming both are 64-bit numbers
|
|
function int64copy(dst, src)
|
|
{
|
|
dst.h = src.h;
|
|
dst.l = src.l;
|
|
}
|
|
|
|
//Right-rotates a 64-bit number by shift
|
|
//Won't handle cases of shift>=32
|
|
//The function revrrot() is for that
|
|
function int64rrot(dst, x, shift)
|
|
{
|
|
dst.l = (x.l >>> shift) | (x.h << (32-shift));
|
|
dst.h = (x.h >>> shift) | (x.l << (32-shift));
|
|
}
|
|
|
|
//Reverses the dwords of the source and then rotates right by shift.
|
|
//This is equivalent to rotation by 32+shift
|
|
function int64revrrot(dst, x, shift)
|
|
{
|
|
dst.l = (x.h >>> shift) | (x.l << (32-shift));
|
|
dst.h = (x.l >>> shift) | (x.h << (32-shift));
|
|
}
|
|
|
|
//Bitwise-shifts right a 64-bit number by shift
|
|
//Won't handle shift>=32, but it's never needed in SHA512
|
|
function int64shr(dst, x, shift)
|
|
{
|
|
dst.l = (x.l >>> shift) | (x.h << (32-shift));
|
|
dst.h = (x.h >>> shift);
|
|
}
|
|
|
|
//Adds two 64-bit numbers
|
|
//Like the original implementation, does not rely on 32-bit operations
|
|
function int64add(dst, x, y)
|
|
{
|
|
var w0 = (x.l & 0xffff) + (y.l & 0xffff);
|
|
var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
|
|
var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
|
|
var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
|
|
dst.l = (w0 & 0xffff) | (w1 << 16);
|
|
dst.h = (w2 & 0xffff) | (w3 << 16);
|
|
}
|
|
|
|
//Same, except with 4 addends. Works faster than adding them one by one.
|
|
function int64add4(dst, a, b, c, d)
|
|
{
|
|
var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
|
|
var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
|
|
var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
|
|
var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
|
|
dst.l = (w0 & 0xffff) | (w1 << 16);
|
|
dst.h = (w2 & 0xffff) | (w3 << 16);
|
|
}
|
|
|
|
//Same, except with 5 addends
|
|
function int64add5(dst, a, b, c, d, e)
|
|
{
|
|
var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff);
|
|
var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16);
|
|
var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16);
|
|
var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
|
|
dst.l = (w0 & 0xffff) | (w1 << 16);
|
|
dst.h = (w2 & 0xffff) | (w3 << 16);
|
|
}
|