Innovenergy_trunk/frontend/node_modules/jsonwebtoken/lib/validateAsymmetricKey.js

67 lines
2.2 KiB
JavaScript

const ASYMMETRIC_KEY_DETAILS_SUPPORTED = require('./asymmetricKeyDetailsSupported');
const RSA_PSS_KEY_DETAILS_SUPPORTED = require('./rsaPssKeyDetailsSupported');
const allowedAlgorithmsForKeys = {
'ec': ['ES256', 'ES384', 'ES512'],
'rsa': ['RS256', 'PS256', 'RS384', 'PS384', 'RS512', 'PS512'],
'rsa-pss': ['PS256', 'PS384', 'PS512']
};
const allowedCurves = {
ES256: 'prime256v1',
ES384: 'secp384r1',
ES512: 'secp521r1',
};
module.exports = function(algorithm, key) {
if (!algorithm || !key) return;
const keyType = key.asymmetricKeyType;
if (!keyType) return;
const allowedAlgorithms = allowedAlgorithmsForKeys[keyType];
if (!allowedAlgorithms) {
throw new Error(`Unknown key type "${keyType}".`);
}
if (!allowedAlgorithms.includes(algorithm)) {
throw new Error(`"alg" parameter for "${keyType}" key type must be one of: ${allowedAlgorithms.join(', ')}.`)
}
/*
* Ignore the next block from test coverage because it gets executed
* conditionally depending on the Node version. Not ignoring it would
* prevent us from reaching the target % of coverage for versions of
* Node under 15.7.0.
*/
/* istanbul ignore next */
if (ASYMMETRIC_KEY_DETAILS_SUPPORTED) {
switch (keyType) {
case 'ec':
const keyCurve = key.asymmetricKeyDetails.namedCurve;
const allowedCurve = allowedCurves[algorithm];
if (keyCurve !== allowedCurve) {
throw new Error(`"alg" parameter "${algorithm}" requires curve "${allowedCurve}".`);
}
break;
case 'rsa-pss':
if (RSA_PSS_KEY_DETAILS_SUPPORTED) {
const length = parseInt(algorithm.slice(-3), 10);
const { hashAlgorithm, mgf1HashAlgorithm, saltLength } = key.asymmetricKeyDetails;
if (hashAlgorithm !== `sha${length}` || mgf1HashAlgorithm !== hashAlgorithm) {
throw new Error(`Invalid key for this operation, its RSA-PSS parameters do not meet the requirements of "alg" ${algorithm}.`);
}
if (saltLength !== undefined && saltLength > length >> 3) {
throw new Error(`Invalid key for this operation, its RSA-PSS parameter saltLength does not meet the requirements of "alg" ${algorithm}.`)
}
}
break;
}
}
}