MedicalInsurance/mcp-server/node_modules/jose/dist/webapi/lib/signing.js

import { JOSENotSupported } from '../util/errors.js';
import { checkSigCryptoKey } from './crypto_key.js';
import { invalidKeyInput } from './invalid_key_input.js';
export function checkKeyLength(alg, key) {
    if (alg.startsWith('RS') || alg.startsWith('PS')) {
        const { modulusLength } = key.algorithm;
        if (typeof modulusLength !== 'number' || modulusLength < 2048) {
            throw new TypeError(`${alg} requires key modulusLength to be 2048 bits or larger`);
        }
    }
}
function subtleAlgorithm(alg, algorithm) {
    const hash = `SHA-${alg.slice(-3)}`;
    switch (alg) {
        case 'HS256':
        case 'HS384':
        case 'HS512':
            return { hash, name: 'HMAC' };
        case 'PS256':
        case 'PS384':
        case 'PS512':
            return { hash, name: 'RSA-PSS', saltLength: parseInt(alg.slice(-3), 10) >> 3 };
        case 'RS256':
        case 'RS384':
        case 'RS512':
            return { hash, name: 'RSASSA-PKCS1-v1_5' };
        case 'ES256':
        case 'ES384':
        case 'ES512':
            return { hash, name: 'ECDSA', namedCurve: algorithm.namedCurve };
        case 'Ed25519':
        case 'EdDSA':
            return { name: 'Ed25519' };
        case 'ML-DSA-44':
        case 'ML-DSA-65':
        case 'ML-DSA-87':
            return { name: alg };
        default:
            throw new JOSENotSupported(`alg ${alg} is not supported either by JOSE or your javascript runtime`);
    }
}
async function getSigKey(alg, key, usage) {
    if (key instanceof Uint8Array) {
        if (!alg.startsWith('HS')) {
            throw new TypeError(invalidKeyInput(key, 'CryptoKey', 'KeyObject', 'JSON Web Key'));
        }
        return crypto.subtle.importKey('raw', key, { hash: `SHA-${alg.slice(-3)}`, name: 'HMAC' }, false, [usage]);
    }
    checkSigCryptoKey(key, alg, usage);
    return key;
}
export async function sign(alg, key, data) {
    const cryptoKey = await getSigKey(alg, key, 'sign');
    checkKeyLength(alg, cryptoKey);
    const signature = await crypto.subtle.sign(subtleAlgorithm(alg, cryptoKey.algorithm), cryptoKey, data);
    return new Uint8Array(signature);
}
export async function verify(alg, key, signature, data) {
    const cryptoKey = await getSigKey(alg, key, 'verify');
    checkKeyLength(alg, cryptoKey);
    const algorithm = subtleAlgorithm(alg, cryptoKey.algorithm);
    try {
        return await crypto.subtle.verify(algorithm, cryptoKey, signature, data);
    }
    catch {
        return false;
    }
}