asn1-ts/dist/utils/encodeUnsignedBigEndianInteger.mjs

ASN.1 encoding and decoding, including BER, CER, and DER.

import * as errors from "../errors.mjs";
import { MIN_UINT_32, MAX_UINT_32 } from "../values.mjs";
import { Buffer } from "node:buffer";
export default function encodeUnsignedBigEndianInteger(value) {
    if (value < MIN_UINT_32) {
        throw new errors.ASN1OverflowError(`Number ${value} too small to be encoded as a big-endian unsigned integer.`);
    }
    if (value > MAX_UINT_32) {
        throw new errors.ASN1OverflowError(`Number ${value} too big to be encoded as a big-endian unsigned integer.`);
    }
    const bytes = Buffer.alloc(4);
    bytes.writeUInt32BE(value);
    let startOfNonPadding = 0;
    for (let i = 0; i < bytes.length - 1; i++) {
        if (bytes[i] === 0x00) {
            startOfNonPadding++;
        }
        else {
            break;
        }
    }
    return bytes.subarray(startOfNonPadding);
}