ranch-crypto.js

(function(root){
'use strict';
// Deterministic UTF-8 SHA256 for shared Node/browser construction identities.
// Verified independently against platform crypto; not a collision-resistance proof.
const K=new Uint32Array([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]);
const rotr=(x,n)=>(x>>>n)|(x<<(32-n));
function sha256(text){
 if(typeof text!=='string')throw new TypeError('SHA256 expects text');const data=new TextEncoder().encode(text);if(data.length>2097152)throw new RangeError('SHA256 input exceeds 2MiB');
 const bytes=new Uint8Array(Math.ceil((data.length+9)/64)*64),view=new DataView(bytes.buffer);bytes.set(data);bytes[data.length]=128;view.setUint32(bytes.length-8,0);view.setUint32(bytes.length-4,data.length*8);
 const h=new Uint32Array([0x6a09e667,0xbb67ae85,0x3c6ef372,0xa54ff53a,0x510e527f,0x9b05688c,0x1f83d9ab,0x5be0cd19]),w=new Uint32Array(64);
 for(let start=0;start<bytes.length;start+=64){for(let i=0;i<16;i++)w[i]=view.getUint32(start+4*i);for(let i=16;i<64;i++){const a=w[i-15],b=w[i-2],s0=rotr(a,7)^rotr(a,18)^(a>>>3),s1=rotr(b,17)^rotr(b,19)^(b>>>10);w[i]=(w[i-16]+s0+w[i-7]+s1)>>>0;}
  let [a,b,c,d,e,f,g,j]=h;for(let i=0;i<64;i++){const s1=rotr(e,6)^rotr(e,11)^rotr(e,25),ch=(e&f)^(~e&g),t1=(j+s1+ch+K[i]+w[i])>>>0,s0=rotr(a,2)^rotr(a,13)^rotr(a,22),maj=(a&b)^(a&c)^(b&c),t2=(s0+maj)>>>0;j=g;g=f;f=e;e=(d+t1)>>>0;d=c;c=b;b=a;a=(t1+t2)>>>0;}
  const next=[a,b,c,d,e,f,g,j];for(let i=0;i<8;i++)h[i]=(h[i]+next[i])>>>0;
 }
 return Array.from(h,x=>x.toString(16).padStart(8,'0')).join('');
}
const api=Object.freeze({sha256});if(typeof module!=='undefined')module.exports=api;root.RanchCrypto=api;
})(typeof globalThis!=='undefined'?globalThis:this);