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SHA256Compress.js
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SHA256Compress.js
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/**
* Secure Hash Algorithm with 256-bit digest (SHA-256) implementation.
*
* See FIPS 180-2 for details.
*
* @author Dave Longley
*
* Copyright (c) 2010-2015 Digital Bazaar, Inc.
*/
/**
*
* Modified by Aymeric Vitte 2016 to implement Zcash SHA256Compress function
*
*/
var forge={};
var sha256 = forge.sha256 = forge.sha256 || {};
forge.md = forge.md || {};
forge.md.algorithms = forge.md.algorithms || {};
forge.md.sha256 = forge.md.algorithms.sha256 = sha256;
var q=forge;var l=q.util=q.util||{};if(typeof process==="undefined"||!process.nextTick){if(typeof setImmediate==="function"){l.setImmediate=setImmediate;l.nextTick=function(s){return setImmediate(s)}}else{l.setImmediate=function(s){setTimeout(s,0)};l.nextTick=l.setImmediate}}else{l.nextTick=process.nextTick;if(typeof setImmediate==="function"){l.setImmediate=setImmediate}else{l.setImmediate=l.nextTick}}l.isArray=Array.isArray||function(s){return Object.prototype.toString.call(s)==="[object Array]"};l.ByteBuffer=function(s){this.data=s||"";this.read=0};l.ByteBuffer.prototype.length=function(){return this.data.length-this.read};l.ByteBuffer.prototype.isEmpty=function(){return this.length()<=0};l.ByteBuffer.prototype.putByte=function(s){this.data+=String.fromCharCode(s);return this};l.ByteBuffer.prototype.fillWithByte=function(s,u){s=String.fromCharCode(s);var t=this.data;while(u>0){if(u&1){t+=s}u>>>=1;if(u>0){s+=s}}this.data=t;return this};l.ByteBuffer.prototype.putBytes=function(s){this.data+=s;return this};l.ByteBuffer.prototype.putString=function(s){this.data+=l.encodeUtf8(s);return this};l.ByteBuffer.prototype.putInt16=function(s){this.data+=String.fromCharCode(s>>8&255)+String.fromCharCode(s&255);return this};l.ByteBuffer.prototype.putInt24=function(s){this.data+=String.fromCharCode(s>>16&255)+String.fromCharCode(s>>8&255)+String.fromCharCode(s&255);return this};l.ByteBuffer.prototype.putInt32=function(s){this.data+=String.fromCharCode(s>>24&255)+String.fromCharCode(s>>16&255)+String.fromCharCode(s>>8&255)+String.fromCharCode(s&255);return this};l.ByteBuffer.prototype.putInt16Le=function(s){this.data+=String.fromCharCode(s&255)+String.fromCharCode(s>>8&255);return this};l.ByteBuffer.prototype.putInt24Le=function(s){this.data+=String.fromCharCode(s&255)+String.fromCharCode(s>>8&255)+String.fromCharCode(s>>16&255);return this};l.ByteBuffer.prototype.putInt32Le=function(s){this.data+=String.fromCharCode(s&255)+String.fromCharCode(s>>8&255)+String.fromCharCode(s>>16&255)+String.fromCharCode(s>>24&255);return this};l.ByteBuffer.prototype.putInt=function(s,t){do{t-=8;this.data+=String.fromCharCode((s>>t)&255)}while(t>0);return this};l.ByteBuffer.prototype.putSignedInt=function(s,t){if(s<0){s+=2<<(t-1)}return this.putInt(s,t)};l.ByteBuffer.prototype.putBuffer=function(s){this.data+=s.getBytes();return this};l.ByteBuffer.prototype.getByte=function(){return this.data.charCodeAt(this.read++)};l.ByteBuffer.prototype.getInt16=function(){var s=(this.data.charCodeAt(this.read)<<8^this.data.charCodeAt(this.read+1));this.read+=2;return s};l.ByteBuffer.prototype.getInt24=function(){var s=(this.data.charCodeAt(this.read)<<16^this.data.charCodeAt(this.read+1)<<8^this.data.charCodeAt(this.read+2));this.read+=3;return s};l.ByteBuffer.prototype.getInt32=function(){var s=(this.data.charCodeAt(this.read)<<24^this.data.charCodeAt(this.read+1)<<16^this.data.charCodeAt(this.read+2)<<8^this.data.charCodeAt(this.read+3));this.read+=4;return s};l.ByteBuffer.prototype.getInt16Le=function(){var s=(this.data.charCodeAt(this.read)^this.data.charCodeAt(this.read+1)<<8);this.read+=2;return s};l.ByteBuffer.prototype.getInt24Le=function(){var s=(this.data.charCodeAt(this.read)^this.data.charCodeAt(this.read+1)<<8^this.data.charCodeAt(this.read+2)<<16);this.read+=3;return s};l.ByteBuffer.prototype.getInt32Le=function(){var s=(this.data.charCodeAt(this.read)^this.data.charCodeAt(this.read+1)<<8^this.data.charCodeAt(this.read+2)<<16^this.data.charCodeAt(this.read+3)<<24);this.read+=4;return s};l.ByteBuffer.prototype.getInt=function(t){var s=0;do{s=(s<<8)+this.data.charCodeAt(this.read++);t-=8}while(t>0);return s};l.ByteBuffer.prototype.getSignedInt=function(u){var t=this.getInt(u);var s=2<<(u-2);if(t>=s){t-=s<<1}return t};l.ByteBuffer.prototype.getBytes=function(s){var t;if(s){s=Math.min(this.length(),s);t=this.data.slice(this.read,this.read+s);this.read+=s}else{if(s===0){t=""}else{t=(this.read===0)?this.data:this.data.slice(this.read);this.clear()}}return t};l.ByteBuffer.prototype.bytes=function(s){return(typeof(s)==="undefined"?this.data.slice(this.read):this.data.slice(this.read,this.read+s))};l.ByteBuffer.prototype.at=function(s){return this.data.charCodeAt(this.read+s)};l.ByteBuffer.prototype.setAt=function(t,s){this.data=this.data.substr(0,this.read+t)+String.fromCharCode(s)+this.data.substr(this.read+t+1);return this};l.ByteBuffer.prototype.last=function(){return this.data.charCodeAt(this.data.length-1)};l.ByteBuffer.prototype.copy=function(){var s=l.createBuffer(this.data);s.read=this.read;return s};l.ByteBuffer.prototype.compact=function(){if(this.read>0){this.data=this.data.slice(this.read);this.read=0}return this};l.ByteBuffer.prototype.clear=function(){this.data="";this.read=0;return 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u=0;while(u<t.length){y=r[t.charCodeAt(u++)-43];x=r[t.charCodeAt(u++)-43];w=r[t.charCodeAt(u++)-43];v=r[t.charCodeAt(u++)-43];s+=String.fromCharCode((y<<2)|(x>>4));if(w!==64){s+=String.fromCharCode(((x&15)<<4)|(w>>2));if(v!==64){s+=String.fromCharCode(((w&3)<<6)|v)}}}return s};l.encodeUtf8=function(s){return unescape(encodeURIComponent(s))};l.decodeUtf8=function(s){return decodeURIComponent(escape(s))};l.deflate=function(v,t,u){t=l.decode64(v.deflate(l.encode64(t)).rval);if(u){var w=2;var s=t.charCodeAt(1);if(s&32){w=6}t=t.substring(w,t.length-4)}return t};l.inflate=function(u,s,t){var v=u.inflate(l.encode64(s)).rval;return(v===null)?null:l.decode64(v)};var i=function(s,v,u){if(!s){throw {message:"WebStorage not available."}}var t;if(u===null){t=s.removeItem(v)}else{u=l.encode64(JSON.stringify(u));t=s.setItem(v,u)}if(typeof(t)!=="undefined"&&t.rval!==true){throw t.error}};var k=function(s,u){if(!s){throw {message:"WebStorage not available."}}var 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null};l.bytesFromIPv4=function(v){v=v.split(".");if(v.length!==4){return null}var s=l.createBuffer();for(var u=0;u<v.length;++u){var t=parseInt(v[u],10);if(isNaN(t)){return null}s.putByte(t)}return s.getBytes()};l.bytesFromIPv6=function(x){var w=0;x=x.split(":").filter(function(y){if(y.length===0){++w}return true});var u=(8-x.length+w)*2;var s=l.createBuffer();for(var v=0;v<8;++v){if(!x[v]||x[v].length===0){s.fillWithByte(0,u);u=0;continue}var t=l.hexToBytes(x[v]);if(t.length<2){s.putByte(0)}s.putBytes(t)}return s.getBytes()};l.bytesToIP=function(s){if(s.length===4){return l.bytesToIPv4(s)}if(s.length===16){return l.bytesToIPv6(s)}return null};l.bytesToIPv4=function(s){if(s.length!==4){return null}var u=[];for(var t=0;t<s.length;++t){u.push(s.charCodeAt(t))}return u.join(".")};l.bytesToIPv6=function(A){if(A.length!==16){return null}var u=[];var z=[];var v=0;for(var t=0;t<A.length;t+=2){var s=l.bytesToHex(A[t]+A[t+1]);while(s[0]==="0"&&s!=="0"){s=s.substr(1)}if(s==="0"){var y=z[z.length-1];var w=u.length;if(!y||w!==y.end+1){z.push({start:w,end:w})}else{y.end=w;if((y.end-y.start)>(z[v].end-z[v].start)){v=z.length-1}}}u.push(s)}if(z.length>0){var x=z[v];if(x.end-x.start>0){u.splice(x.start,x.end-x.start+1,"");if(x.start===0){u.unshift("")}if(x.end===7){u.push("")}}}return u.join(":")}
function _init(){_padding=String.fromCharCode(128),_padding+=forge.util.fillString(String.fromCharCode(0),64),_k=[1116352408,1899447441,3049323471,3921009573,961987163,1508970993,2453635748,2870763221,3624381080,310598401,607225278,1426881987,1925078388,2162078206,2614888103,3248222580,3835390401,4022224774,264347078,604807628,770255983,1249150122,1555081692,1996064986,2554220882,2821834349,2952996808,3210313671,3336571891,3584528711,113926993,338241895,666307205,773529912,1294757372,1396182291,1695183700,1986661051,2177026350,2456956037,2730485921,2820302411,3259730800,3345764771,3516065817,3600352804,4094571909,275423344,430227734,506948616,659060556,883997877,958139571,1322822218,1537002063,1747873779,1955562222,2024104815,2227730452,2361852424,2428436474,2756734187,3204031479,3329325298],_initialized=!0}function _update(e,t,h){for(var n,r,g,a,u,l,i,f,s,o,d,p,L,c,_,m=h.length();m>=64;){for(i=0;16>i;++i)t[i]=h.getInt32();for(;64>i;++i)n=t[i-2],n=(n>>>17|n<<15)^(n>>>19|n<<13)^n>>>10,r=t[i-15],r=(r>>>7|r<<25)^(r>>>18|r<<14)^r>>>3,t[i]=n+t[i-7]+r+t[i-16]|0;for(f=e.h0,s=e.h1,o=e.h2,d=e.h3,p=e.h4,L=e.h5,c=e.h6,_=e.h7,i=0;64>i;++i)a=(p>>>6|p<<26)^(p>>>11|p<<21)^(p>>>25|p<<7),u=c^p&(L^c),g=(f>>>2|f<<30)^(f>>>13|f<<19)^(f>>>22|f<<10),l=f&s|o&(f^s),n=_+a+u+_k[i]+t[i],r=g+l,_=c,c=L,L=p,p=d+n>>>0,d=o,o=s,s=f,f=n+r>>>0;e.h0=e.h0+f|0,e.h1=e.h1+s|0,e.h2=e.h2+o|0,e.h3=e.h3+d|0,e.h4=e.h4+p|0,e.h5=e.h5+L|0,e.h6=e.h6+c|0,e.h7=e.h7+_|0,m-=64}}sha256.create=function(){_initialized||_init();var e=null,t=forge.util.createBuffer(),h=new Array(64),n={algorithm:"sha256",blockLength:64,digestLength:32,messageLength:0,fullMessageLength:null,messageLengthSize:8};return n.start=function(){n.messageLength=0,n.fullMessageLength=n.messageLength64=[];for(var h=n.messageLengthSize/4,r=0;h>r;++r)n.fullMessageLength.push(0);return t=forge.util.createBuffer(),e={h0:1779033703,h1:3144134277,h2:1013904242,h3:2773480762,h4:1359893119,h5:2600822924,h6:528734635,h7:1541459225},n},n.start(),n.update=function(r,g){"utf8"===g&&(r=forge.util.encodeUtf8(r));var a=r.length;n.messageLength+=a,a=[a/4294967296>>>0,a>>>0];for(var u=n.fullMessageLength.length-1;u>=0;--u)n.fullMessageLength[u]+=a[1],a[1]=a[0]+(n.fullMessageLength[u]/4294967296>>>0),n.fullMessageLength[u]=n.fullMessageLength[u]>>>0,a[0]=a[1]/4294967296>>>0;return t.putBytes(r),_update(e,h,t),(t.read>2048||0===t.length())&&t.compact(),n},n.digest=function(){var n=forge.util.createBuffer();n.putBytes(t.bytes());var r={h0:e.h0,h1:e.h1,h2:e.h2,h3:e.h3,h4:e.h4,h5:e.h5,h6:e.h6,h7:e.h7};_update(r,h,n);var g=forge.util.createBuffer();return g.putInt32(r.h0),g.putInt32(r.h1),g.putInt32(r.h2),g.putInt32(r.h3),g.putInt32(r.h4),g.putInt32(r.h5),g.putInt32(r.h6),g.putInt32(r.h7),g},n};var _padding=null,_initialized=!1,_k=null;
var SHA256Compress=function(buf) {
//stupid manipulations because of stupid deprecation of binary format in nodejs
var hash=sha256.create();
hash.update(String.fromCharCode.apply(null,buf));
var hash=hash.digest().data;
var l=hash.length;
var b=new Buffer(l);
for (var i=0;i<l;i++) {
b[i]=hash.charCodeAt(i);
};
return b;
};
/* tests
var buf=Buffer.concat([new Buffer('c65e8ed445c3e6456320735348c9835a3e7265de13655c549dbdbce2ad0dec2d','hex'),new Buffer('0000000000000000000000000000000000000000000000000000000000000000','hex')])
console.log(SHA256Compress(buf).toString('hex'));
//9a20b2f42391d61fa598dce28efe02e755ea06cc10d498e6124a1df9480c4f00
*/
module.exports=SHA256Compress;