/* A JavaScript implementation of the SHA family of hashes, as defined in FIPS PUB 180-2
 * Version 1.11 Copyright Brian Turek 2008
 * Distributed under the BSD License
 * See http://jssha.sourceforge.net/ for more information
 *
 * Several functions taken from Paul Johnson
 */
 
function jsSHA(srcString){jsSHA.charSize=8;jsSHA.b64pad ="";jsSHA.hexCase=0;var sha224=null;var sha256=null;var str2binb=function(str){var bin=[];var mask =(1 << jsSHA.charSize)- 1;var length=str.length*jsSHA.charSize;for(var i=0;i<length;i += jsSHA.charSize){bin[i >> 5] |=(str.charCodeAt(i/jsSHA.charSize)& mask)<<(32-jsSHA.charSize-i%32);}return bin;};var strBinLen=srcString.length*jsSHA.charSize;var strToHash=str2binb(srcString);var binb2hex=function(binarray){var hex_tab=jsSHA.hexCase?"0123456789ABCDEF":"0123456789abcdef";var str="";var length=binarray.length*4;for(var i=0;i<length;i++){str += hex_tab.charAt((binarray[i >> 2] >>((3-i%4)* 8+4))& 0xF)+ hex_tab.charAt((binarray[i >> 2] >>((3-i%4)* 8))& 0xF);}return str;};var binb2b64=function(binarray){var tab="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";var str="";var length=binarray.length*4;for(var i=0;i<length;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 += jsSHA.b64pad;}else{str += tab.charAt((triplet >> 6 *(3-j))& 0x3F);}}}return str;};var rotr=function(x,n){if(n<32){return(x >>> n)|(x <<(32-n));}else{return x;}};var shr=function(x,n){if(n<32){return x >>> n;}else{return 0;}};var ch=function(x,y,z){return(x & y)^(~x & z);};var maj=function(x,y,z){return(x & y)^(x & z)^(y & z);};var sigma0=function(x){return rotr(x,2)^ rotr(x,13)^ rotr(x,22);};var sigma1=function(x){return rotr(x,6)^ rotr(x,11)^ rotr(x,25);};var gamma0=function(x){return rotr(x,7)^ rotr(x,18)^ shr(x,3);};var gamma1=function(x){return rotr(x,17)^ rotr(x,19)^ shr(x,10);};var safeAdd=function(x,y){var lsw =(x & 0xFFFF)+(y & 0xFFFF);var msw =(x >>> 16)+(y >>> 16)+(lsw >>> 16);return((msw & 0xFFFF)<< 16)|(lsw & 0xFFFF);};var coreSHA2=function(variant){var W=[];var a,b,c,d,e,f,g,h;var T1,T2;var H;var K=[0x428A2F98,0x71374491,0xB5C0FBCF,0xE9B5DBA5,0x3956C25B,0x59F111F1,0x923F82A4,0xAB1C5ED5,0xD807AA98,0x12835B01,0x243185BE,0x550C7DC3,0x72BE5D74,0x80DEB1FE,0x9BDC06A7,0xC19BF174,0xE49B69C1,0xEFBE4786,0x0FC19DC6,0x240CA1CC,0x2DE92C6F,0x4A7484AA,0x5CB0A9DC,0x76F988DA,0x983E5152,0xA831C66D,0xB00327C8,0xBF597FC7,0xC6E00BF3,0xD5A79147,0x06CA6351,0x14292967,0x27B70A85,0x2E1B2138,0x4D2C6DFC,0x53380D13,0x650A7354,0x766A0ABB,0x81C2C92E,0x92722C85,0xA2BFE8A1,0xA81A664B,0xC24B8B70,0xC76C51A3,0xD192E819,0xD6990624,0xF40E3585,0x106AA070,0x19A4C116,0x1E376C08,0x2748774C,0x34B0BCB5,0x391C0CB3,0x4ED8AA4A,0x5B9CCA4F,0x682E6FF3,0x748F82EE,0x78A5636F,0x84C87814,0x8CC70208,0x90BEFFFA,0xA4506CEB,0xBEF9A3F7,0xC67178F2];if(variant==="SHA-224"){H=[0xc1059ed8,0x367cd507,0x3070dd17,0xf70e5939,0xffc00b31,0x68581511,0x64f98fa7,0xbefa4fa4];}else{H=[0x6A09E667,0xBB67AE85,0x3C6EF372,0xA54FF53A,0x510E527F,0x9B05688C,0x1F83D9AB,0x5BE0CD19];}var message=strToHash.slice();message[strBinLen >> 5] |= 0x80 <<(24-strBinLen%32);message[((strBinLen+1+64 >> 9)<< 4)+ 15]=strBinLen;var appendedMessageLength=message.length;for(var i=0;i<appendedMessageLength;i += 16){a=H[0];b=H[1];c=H[2];d=H[3];e=H[4];f=H[5];g=H[6];h=H[7];for(var t=0;t<64;t++){if(t<16){W[t]=message[t+i];}else{W[t]=safeAdd(safeAdd(safeAdd(gamma1(W[t-2]),W[t-7]),gamma0(W[t-15])),W[t-16]);}T1=safeAdd(safeAdd(safeAdd(safeAdd(h,sigma1(e)),ch(e,f,g)),K[t]),W[t]);T2=safeAdd(sigma0(a),maj(a,b,c));h=g;g=f;f=e;e=safeAdd(d,T1);d=c;c=b;b=a;a=safeAdd(T1,T2);}H[0]=safeAdd(a,H[0]);H[1]=safeAdd(b,H[1]);H[2]=safeAdd(c,H[2]);H[3]=safeAdd(d,H[3]);H[4]=safeAdd(e,H[4]);H[5]=safeAdd(f,H[5]);H[6]=safeAdd(g,H[6]);H[7]=safeAdd(h,H[7]);}switch(variant){case "SHA-224":return[H[0],H[1],H[2],H[3],H[4],H[5],H[6]];case "SHA-256":return H;default:return [];}};this.getHash=function(variant,format){var formatFunc=null;switch(format){case "HEX":formatFunc=binb2hex;break;case "B64":formatFunc=binb2b64;break;default:return "FORMAT NOT RECOGNIZED";}switch(variant){case "SHA-224":if(sha224===null){sha224=coreSHA2(variant);}return formatFunc(sha224);case "SHA-256":if(sha256===null){sha256=coreSHA2(variant);}return formatFunc(sha256);default:return "HASH NOT RECOGNIZED";}};}