41 lines
1.3 KiB
TypeScript
41 lines
1.3 KiB
TypeScript
import {
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SERVER_KEYS_CODES,
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ServerKeysError,
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} from "../../error-codes/error-codes.js";
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/** Encode a byte array as a lowercase hex string (no separators). */
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export function bytesToHex(bytes: Uint8Array): string {
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let out = "";
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for (const byte of bytes) out += byte.toString(16).padStart(2, "0");
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return out;
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}
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/**
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* Decode a lowercase or uppercase hex string into a `Uint8Array`. Throws
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* `ServerKeysError(SERVER_KEYS_INVALID_INPUT)` on odd length or non-hex
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* characters. Used by the license sub-commands to deserialise the
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* `signingKey` / `publicKey` fields of the `LicenseKeypairFile` JSON
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* envelope.
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*/
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export function hexToBytes(hex: string): Uint8Array {
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if (hex.length % 2 !== 0) {
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throw new ServerKeysError(
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SERVER_KEYS_CODES.INVALID_INPUT,
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"Hex string length must be even"
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);
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}
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const out = new Uint8Array(hex.length / 2);
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for (let i = 0; i < out.length; i++) {
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const start = i * 2;
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const slice = hex.slice(start, start + 2);
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if (!/^[0-9a-fA-F]{2}$/.test(slice)) {
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throw new ServerKeysError(
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SERVER_KEYS_CODES.INVALID_INPUT,
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`Invalid hex byte "${slice}" at offset ${start}`
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);
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}
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out[i] = Number.parseInt(slice, 16);
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}
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return out;
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}
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