@reclaimprotocol/tls/lib/crypto/common.js

TLS 1.2/1.3 for any JavaScript Environment

import { OriginatorPublicKey } from '@peculiar/asn1-cms';
import { RSAPublicKey } from '@peculiar/asn1-rsa';
import { AsnParser } from '@peculiar/asn1-schema';
export function parseRsaPublicKeyFromAsn1(asn1) {
    const parsed = AsnParser.parse(asn1, OriginatorPublicKey);
    const rsaPubKey = AsnParser.parse(parsed.publicKey, RSAPublicKey);
    return {
        e: bufToBigint(bufToUint8Array(rsaPubKey.publicExponent)),
        n: bufToBigint(bufToUint8Array(rsaPubKey.modulus)),
    };
}
export function bufToUint8Array(buf) {
    if (buf instanceof Uint8Array) {
        return buf;
    }
    return new Uint8Array(buf);
}
const BITS = 8n;
function bufToBigint(buf) {
    let ret = 0n;
    for (const i of buf.values()) {
        const bi = BigInt(i);
        ret = (ret << BITS) + bi;
    }
    return ret;
}