function SHA256(s){
var chrsz=8
var hexcase=0
function safe_add(x,y){
var lsw=(x&0xFFFF)+(y&0xFFFF)
var msw=(x>>16)+(y>>16)+(lsw>>16)
return(msw<<16)|(lsw&0xFFFF)}
function S(X,n){return(X>>>n)|(X<<(32-n));}
function R(X,n){return(X>>>n);}
function Ch(x,y,z){return((x&y)^((~x)&z));}
function Maj(x,y,z){return((x&y)^(x&z)^(y&z));}
function Sigma0256(x){return(S(x,2)^ S(x,13)^ S(x,22));}
function Sigma1256(x){return(S(x,6)^ S(x,11)^ S(x,25));}
function Gamma0256(x){return(S(x,7)^ S(x,18)^ R(x,3));}
function Gamma1256(x){return(S(x,17)^ S(x,19)^ R(x,10));}
function core_sha256(m,l){
var K=new Array(0x428A2F98,0x71374491,0xB5C0FBCF,0xE9B5DBA5,0x3956C25B,0x59F111F1,0x923F82A4,0xAB1C5ED5,0xD807AA98,0x12835B01,0x243185BE,0x550C7DC3,0x72BE5D74,0x80DEB1FE,0x9BDC06A7,0xC19BF174,0xE49B69C1,0xEFBE4786,0xFC19DC6,0x240CA1CC,0x2DE92C6F,0x4A7484AA,0x5CB0A9DC,0x76F988DA,0x983E5152,0xA831C66D,0xB00327C8,0xBF597FC7,0xC6E00BF3,0xD5A79147,0x6CA6351,0x14292967,0x27B70A85,0x2E1B2138,0x4D2C6DFC,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)
var HASH=new Array(0x6A09E667,0xBB67AE85,0x3C6EF372,0xA54FF53A,0x510E527F,0x9B05688C,0x1F83D9AB,0x5BE0CD19)
var W=new Array(64)
var a,b,c,d,e,f,g,h,i,j
var T1,T2
m[l>>5] |=0x80<<(24-l % 32)
m[((l+64>>9)<<4)+15]=l
for(var i=0;i<m.length;i+=16){
a=HASH[0]
b=HASH[1]
c=HASH[2]
d=HASH[3]
e=HASH[4]
f=HASH[5]
g=HASH[6]
h=HASH[7]
for(var j=0;j<64;j++){
if(j<16)W[j]=m[j+i]
else W[j]=safe_add(safe_add(safe_add(Gamma1256(W[j-2]),W[j-7]),Gamma0256(W[j-15])),W[j-16])
T1=safe_add(safe_add(safe_add(safe_add(h,Sigma1256(e)),Ch(e,f,g)),K[j]),W[j])
T2=safe_add(Sigma0256(a),Maj(a,b,c))
h=g
g=f
f=e
e=safe_add(d,T1)
d=c
c=b
b=a
a=safe_add(T1,T2)}
HASH[0]=safe_add(a,HASH[0])
HASH[1]=safe_add(b,HASH[1])
HASH[2]=safe_add(c,HASH[2])
HASH[3]=safe_add(d,HASH[3])
HASH[4]=safe_add(e,HASH[4])
HASH[5]=safe_add(f,HASH[5])
HASH[6]=safe_add(g,HASH[6])
HASH[7]=safe_add(h,HASH[7])}
return HASH}
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}
function Utf8Encode(string){
string=string.replace(/\r\n/g,"\n")
var utftext=""
for(var n=0;n<string.length;n++){
var c=string.charCodeAt(n)
if(c<128){
utftext+=String.fromCharCode(c)}
else if((c>127)&&(c<2048)){
utftext+=String.fromCharCode((c>>6)| 192)
utftext+=String.fromCharCode((c&63)| 128)}
else{
utftext+=String.fromCharCode((c>>12)| 224)
utftext+=String.fromCharCode(((c>>6)&63)| 128)
utftext+=String.fromCharCode((c&63)| 128)}}
return utftext}
function binb2hex(binarray){
var hex_tab=hexcase ? "0123456789ABCDEF" : "0123456789abcdef"
var str=""
for(var i=0;i<binarray.length*4;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}
s=Utf8Encode(s)
return binb2hex(core_sha256(str2binb(s),s.length*chrsz))}