OTPWCalc Sources: comparison src/firefoxos/hashes/sha1.js

comparison: src/firefoxos/hashes/sha1.js

src/firefoxos/hashes/sha1.js

changeset 0: 6a0957738c54

equal deleted inserted replaced

--1:000000000000
+:3517ff4812a1
+/*
+* A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
+* in FIPS PUB 180-1
+* Version 2.1 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 hexsha1(s){return binb2hex(coresha1(str2binb(s),s.length * chrsz));}
+function b64sha1(s){return binb2b64(coresha1(str2binb(s),s.length * chrsz));}
+function strsha1(s){return binb2str(coresha1(str2binb(s),s.length * chrsz));}
+function hexhmacsha1(key, data){ return binb2hex(corehmacsha1(key, data));}
+function b64hmacsha1(key, data){ return binb2b64(corehmacsha1(key, data));}
+function strhmacsha1(key, data){ return binb2str(corehmacsha1(key, data));}
+/*
+* Perform a simple self-test to see if the VM is working
+*/
+function sha1vmtest()
+{
+return hexsha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
+}
+/*
+* Calculate the SHA-1 of an array of big-endian words, and a bit length
+*/
+function coresha1(x, len)
+{
+/* append padding */
+x[len >> 5] |= 0x80 << (24 - len % 32);
+x[((len + 64 >> 9) << 4) + 15] = len;
+var w = Array(80);
+var a =  1732584193;
+var b = -271733879;
+var c = -1732584194;
+var d =  271733878;
+var e = -1009589776;
+for(var i = 0; i < x.length; i += 16)
+{
+var olda = a;
+var oldb = b;
+var oldc = c;
+var oldd = d;
+var olde = e;
+for(var 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);
+var t = safeadd(safeadd(rol(a, 5), sha1ft(j, b, c, d)),
+safeadd(safeadd(e, w[j]), sha1kt(j)));
+e = d;
+d = c;
+c = rol(b, 30);
+b = a;
+a = t;
+}
+a = safeadd(a, olda);
+b = safeadd(b, oldb);
+c = safeadd(c, oldc);
+d = safeadd(d, oldd);
+e = safeadd(e, olde);
+}
+return Array(a, b, c, d, e);
+}
+/*
+* Perform the appropriate triplet combination function for the current
+* iteration
+*/
+function sha1ft(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 sha1kt(t)
+{
+return (t < 20) ?  1518500249 : (t < 40) ?  1859775393 :
+(t < 60) ? -1894007588 : -899497514;
+}
+/*
+* Calculate the HMAC-SHA1 of a key and some data
+*/
+function corehmacsha1(key, data)
+{
+var bkey = str2binb(key);
+if(bkey.length > 16) bkey = coresha1(bkey, key.length * chrsz);
+var ipad = Array(16), opad = Array(16);
+for(var i = 0; i < 16; i++)
+{
+ipad[i] = bkey[i] ^ 0x36363636;
+opad[i] = bkey[i] ^ 0x5C5C5C5C;
+}
+var hash = coresha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz);
+return coresha1(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 safeadd(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 = Array();
+var mask = (1 << chrsz) - 1;
+for(var i = 0; i < str.length * chrsz; i += chrsz)
+bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - 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] >>> (24 - i%32)) & mask);
+return str;
+}
+/*
+* Convert an array of big-endian words to a hex string.
+*/
+function binb2hex(binarray)
+{
+var hextab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
+var str = "";
+for(var i = 0; i < binarray.length * 4; i++)
+{
+str += hextab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
+hextab.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 = "";
+for(var i = 0; i < binarray.length * 4; i += 3)
+{
+var 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(var 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;
+}