68 lines
1.4 KiB
TypeScript
68 lines
1.4 KiB
TypeScript
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import * as crypto from './crypto';
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interface Addressable {
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key(): string
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digest(): string
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}
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function stringToBytes(s:string) {
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const a = new Uint8Array(20);
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let j = 2;
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for (let i = 0; i < a.byteLength; i++) {
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const n = parseInt(s.substring(j, j+2), 16);
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a[i] = n;
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j += 2;
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}
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return a;
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}
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function bytesToHex(a:Uint8Array) {
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let s = '';
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for (let i = 0; i < a.byteLength; i++) {
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const h = '00' + a[i].toString(16);
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s += h.slice(-2);
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}
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return s;
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}
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async function mergeKey(a:Uint8Array, s:Uint8Array) {
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const y = new Uint8Array(a.byteLength + s.byteLength);
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for (let i = 0; i < a.byteLength; i++) {
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y[i] = a[i];
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}
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for (let i = 0; i < s.byteLength; i++) {
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y[a.byteLength + i] = s[i];
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}
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const z = await crypto.subtle.digest('SHA-256', y);
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return bytesToHex(new Uint8Array(z));
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}
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async function toKey(v:string, salt:string) {
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const a = stringToBytes(v);
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const s = new TextEncoder().encode(salt);
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return await mergeKey(a, s);
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}
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async function toAddressKey(zeroExHex:string, salt:string) {
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const a = addressToBytes(zeroExHex);
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const s = new TextEncoder().encode(salt);
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return await mergeKey(a, s);
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}
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const re_addrHex = /^0[xX][a-fA-F0-9]{40}$/;
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function addressToBytes(s:string) {
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if (!s.match(re_addrHex)) {
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throw 'invalid address hex';
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}
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return stringToBytes(s);
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}
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export {
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toKey,
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toAddressKey,
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bytesToHex,
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addressToBytes,
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Addressable,
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}
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