File size: 2,238 Bytes
270d713 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | 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;
}
}
}
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