| /* |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| */ |
| |
| var HASH256 = function() { |
| this.length=[]; |
| this.h=[]; |
| this.w=[]; |
| this.init(); |
| }; |
| |
| HASH256.prototype={ |
| |
| /* functions */ |
| |
| transform: function() |
| { /* basic transformation step */ |
| var a,b,c,d,e,f,g,hh,t1,t2; |
| var j; |
| for (j=16;j<64;j++) |
| this.w[j]=(HASH256.theta1(this.w[j-2])+this.w[j-7]+HASH256.theta0(this.w[j-15])+this.w[j-16])|0; |
| |
| a=this.h[0]; b=this.h[1]; c=this.h[2]; d=this.h[3]; |
| e=this.h[4]; f=this.h[5]; g=this.h[6]; hh=this.h[7]; |
| |
| for (j=0;j<64;j++) |
| { /* 64 times - mush it up */ |
| t1=(hh+HASH256.Sig1(e)+HASH256.Ch(e,f,g)+HASH256.HK[j]+this.w[j])|0; |
| t2=(HASH256.Sig0(a)+HASH256.Maj(a,b,c))|0; |
| hh=g; g=f; f=e; |
| e=(d+t1)|0; // Need to knock these back down to prevent 52-bit overflow |
| d=c; |
| c=b; |
| b=a; |
| a=(t1+t2)|0; |
| |
| } |
| this.h[0]+=a; this.h[1]+=b; this.h[2]+=c; this.h[3]+=d; |
| this.h[4]+=e; this.h[5]+=f; this.h[6]+=g; this.h[7]+=hh; |
| |
| }, |
| |
| /* Initialise Hash function */ |
| init: function() |
| { /* initialise */ |
| var i; |
| for (i=0;i<64;i++) this.w[i]=0; |
| this.length[0]=this.length[1]=0; |
| this.h[0]=HASH256.H[0]; |
| this.h[1]=HASH256.H[1]; |
| this.h[2]=HASH256.H[2]; |
| this.h[3]=HASH256.H[3]; |
| this.h[4]=HASH256.H[4]; |
| this.h[5]=HASH256.H[5]; |
| this.h[6]=HASH256.H[6]; |
| this.h[7]=HASH256.H[7]; |
| }, |
| |
| /* process a single byte */ |
| process: function(byt) |
| { /* process the next message byte */ |
| var cnt; |
| |
| cnt=(this.length[0]>>>5)%16; |
| this.w[cnt]<<=8; |
| this.w[cnt]|=(byt&0xFF); |
| this.length[0]+=8; |
| if ((this.length[0]&0xffffffff)===0) { this.length[1]++; this.length[0]=0; } |
| if ((this.length[0]%512)===0) this.transform(); |
| }, |
| |
| /* process an array of bytes */ |
| process_array: function(b) |
| { |
| for (var i=0;i<b.length;i++) this.process(b[i]); |
| }, |
| |
| /* process a 32-bit integer */ |
| process_num: function(n) |
| { |
| this.process((n>>24)&0xff); |
| this.process((n>>16)&0xff); |
| this.process((n>>8)&0xff); |
| this.process(n&0xff); |
| }, |
| |
| hash: function() |
| { /* pad message and finish - supply digest */ |
| var i; |
| var digest=[]; |
| var len0,len1; |
| len0=this.length[0]; |
| len1=this.length[1]; |
| this.process(0x80); |
| while ((this.length[0]%512)!=448) this.process(0); |
| |
| this.w[14]=len1; |
| this.w[15]=len0; |
| this.transform(); |
| |
| for (i=0;i<HASH256.len;i++) |
| { /* convert to bytes */ |
| digest[i]=((this.h[i>>>2]>>(8*(3-i%4))) & 0xff); |
| } |
| this.init(); |
| return digest; |
| } |
| }; |
| |
| /* static functions */ |
| |
| HASH256.S= function(n,x) |
| { |
| return (((x)>>>n) | ((x)<<(32-n))); |
| }; |
| |
| HASH256.R= function(n,x) |
| { |
| return ((x)>>>n); |
| }; |
| |
| HASH256.Ch= function(x,y,z) |
| { |
| return ((x&y)^(~(x)&z)); |
| }; |
| |
| HASH256.Maj= function(x,y,z) |
| { |
| return ((x&y)^(x&z)^(y&z)); |
| }; |
| |
| HASH256.Sig0= function(x) |
| { |
| return (HASH256.S(2,x)^HASH256.S(13,x)^HASH256.S(22,x)); |
| }; |
| |
| HASH256.Sig1= function(x) |
| { |
| return (HASH256.S(6,x)^HASH256.S(11,x)^HASH256.S(25,x)); |
| }; |
| |
| HASH256.theta0= function(x) |
| { |
| return (HASH256.S(7,x)^HASH256.S(18,x)^HASH256.R(3,x)); |
| }; |
| |
| HASH256.theta1= function(x) |
| { |
| return (HASH256.S(17,x)^HASH256.S(19,x)^HASH256.R(10,x)); |
| }; |
| |
| /* constants */ |
| HASH256.len= 32; |
| |
| HASH256.H = [0x6A09E667,0xBB67AE85,0x3C6EF372,0xA54FF53A,0x510E527F,0x9B05688C,0x1F83D9AB,0x5BE0CD19]; |
| |
| HASH256.HK = [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]; |
| |