333 lines
9.2 KiB
Plaintext
333 lines
9.2 KiB
Plaintext
compile insert RTI_PAJ_SHA1
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/*
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* A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
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* in FIPS 180-1
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* Version 2.2 Copyright 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_sha1(s) { return rstr2hex(rstr_sha1(str2rstr_utf8(s))); }
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function b64_sha1(s) { return rstr2b64(rstr_sha1(str2rstr_utf8(s))); }
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function any_sha1(s, e) { return rstr2any(rstr_sha1(str2rstr_utf8(s)), e); }
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function hex_hmac_sha1(k, d)
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{ return rstr2hex(rstr_hmac_sha1(str2rstr_utf8(k), str2rstr_utf8(d))); }
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function b64_hmac_sha1(k, d)
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{ return rstr2b64(rstr_hmac_sha1(str2rstr_utf8(k), str2rstr_utf8(d))); }
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function any_hmac_sha1(k, d, e)
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{ return rstr2any(rstr_hmac_sha1(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 sha1_vm_test()
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{
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return hex_sha1("abc").toLowerCase() == "a9993e364706816aba3e25717850c26c9cd0d89d";
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}
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/*
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* Calculate the SHA1 of a raw string
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*/
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function rstr_sha1(s)
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{
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return binb2rstr(binb_sha1(rstr2binb(s), s.length * 8));
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}
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/*
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* Calculate the HMAC-SHA1 of a key and some data (raw strings)
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*/
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function rstr_hmac_sha1(key, data)
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{
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var bkey = rstr2binb(key);
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if(bkey.length > 16) bkey = binb_sha1(bkey, key.length * 8);
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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 = binb_sha1(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
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return binb2rstr(binb_sha1(opad.concat(hash), 512 + 160));
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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 remainders = Array();
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var i, 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. We stop when the dividend is zero.
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* All remainders are stored for later use.
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*/
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while(dividend.length > 0)
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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[remainders.length] = 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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/* Append leading zero equivalents */
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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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for(i = output.length; i < full_length; i++)
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output = encoding[0] + output;
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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-1 of an array of big-endian words, and a bit length
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*/
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function binb_sha1(x, len)
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{
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/* append padding */
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x[len >> 5] |= 0x80 << (24 - len % 32);
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x[((len + 64 >> 9) << 4) + 15] = len;
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var w = Array(80);
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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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var e = -1009589776;
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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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var olde = e;
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for(var j = 0; j < 80; j++)
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{
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if(j < 16) w[j] = x[i + j];
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else w[j] = bit_rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1);
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var t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)),
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safe_add(safe_add(e, w[j]), sha1_kt(j)));
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e = d;
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d = c;
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c = bit_rol(b, 30);
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b = a;
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a = t;
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}
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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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e = safe_add(e, olde);
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}
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return Array(a, b, c, d, e);
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}
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/*
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* Perform the appropriate triplet combination function for the current
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* iteration
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*/
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function sha1_ft(t, b, c, d)
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{
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if(t < 20) return (b & c) | ((~b) & d);
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if(t < 40) return b ^ c ^ d;
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if(t < 60) return (b & c) | (b & d) | (c & d);
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return b ^ c ^ d;
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}
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/*
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* Determine the appropriate additive constant for the current iteration
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*/
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function sha1_kt(t)
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{
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return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
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(t < 60) ? -1894007588 : -899497514;
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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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