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const {
ObjectKeys,
Promise,
SafeSet,
} = primordials;
const { Buffer } = require('buffer');
const {
ECKeyExportJob,
KeyObjectHandle,
SignJob,
kCryptoJobAsync,
kKeyTypePrivate,
kKeyTypePublic,
kSignJobModeSign,
kSignJobModeVerify,
kSigEncP1363,
} = internalBinding('crypto');
const {
validateBoolean,
validateOneOf,
validateString,
} = require('internal/validators');
const {
codes: {
ERR_INVALID_ARG_TYPE,
ERR_MISSING_OPTION,
}
} = require('internal/errors');
const {
getArrayBufferOrView,
getUsagesUnion,
hasAnyNotIn,
jobPromise,
normalizeHashName,
validateKeyOps,
kHandle,
kKeyObject,
kNamedCurveAliases,
} = require('internal/crypto/util');
const {
lazyDOMException,
} = require('internal/util');
const {
generateKeyPair,
} = require('internal/crypto/keygen');
const {
InternalCryptoKey,
PrivateKeyObject,
PublicKeyObject,
createPrivateKey,
createPublicKey,
isKeyObject,
} = require('internal/crypto/keys');
function verifyAcceptableEcKeyUse(name, type, usages) {
let checkSet;
switch (name) {
case 'ECDH':
checkSet = ['deriveKey', 'deriveBits'];
break;
case 'NODE-ED25519':
// Fall through
case 'NODE-ED448':
// Fall through
case 'ECDSA':
switch (type) {
case 'private':
checkSet = ['sign'];
break;
case 'public':
checkSet = ['verify'];
break;
}
}
if (hasAnyNotIn(usages, checkSet)) {
throw lazyDOMException(
`Unsupported key usage for a ${name} key`,
'SyntaxError');
}
}
function createECPublicKeyRaw(namedCurve, keyData) {
const handle = new KeyObjectHandle();
keyData = getArrayBufferOrView(keyData, 'keyData');
if (handle.initECRaw(kNamedCurveAliases[namedCurve], keyData))
return new PublicKeyObject(handle);
}
function createECRawKey(namedCurve, keyData, isPublic) {
const handle = new KeyObjectHandle();
keyData = getArrayBufferOrView(keyData, 'keyData');
switch (namedCurve) {
case 'NODE-ED25519':
case 'NODE-X25519':
if (keyData.byteLength !== 32) {
throw lazyDOMException(
`${namedCurve} raw keys must be exactly 32-bytes`);
}
break;
case 'NODE-ED448':
if (keyData.byteLength !== 57) {
throw lazyDOMException(
`${namedCurve} raw keys must be exactly 57-bytes`);
}
break;
case 'NODE-X448':
if (keyData.byteLength !== 56) {
throw lazyDOMException(
`${namedCurve} raw keys must be exactly 56-bytes`);
}
break;
}
const keyType = isPublic ? kKeyTypePublic : kKeyTypePrivate;
if (!handle.initEDRaw(namedCurve, keyData, keyType)) {
throw lazyDOMException('Failure to generate key object');
}
return isPublic ? new PublicKeyObject(handle) : new PrivateKeyObject(handle);
}
async function ecGenerateKey(algorithm, extractable, keyUsages) {
const { name, namedCurve } = algorithm;
validateString(namedCurve, 'algorithm.namedCurve');
validateOneOf(
namedCurve,
'algorithm.namedCurve',
ObjectKeys(kNamedCurveAliases));
const usageSet = new SafeSet(keyUsages);
switch (name) {
case 'ECDSA':
if (namedCurve === 'NODE-ED25519' ||
namedCurve === 'NODE-ED448' ||
namedCurve === 'NODE-X25519' ||
namedCurve === 'NODE-X448') {
throw lazyDOMException('Unsupported named curves for ECDSA');
}
// Fall through
case 'NODE-ED25519':
// Fall through
case 'NODE-ED448':
if (hasAnyNotIn(usageSet, ['sign', 'verify'])) {
throw lazyDOMException(
'Unsupported key usage for an ECDSA key',
'SyntaxError');
}
break;
case 'ECDH':
if (hasAnyNotIn(usageSet, ['deriveKey', 'deriveBits'])) {
throw lazyDOMException(
'Unsupported key usage for an ECDH key',
'SyntaxError');
}
if (namedCurve === 'NODE-ED25519' || namedCurve === 'NODE-ED448') {
throw lazyDOMException('Unsupported named curves for ECDH');
}
// Fall through
}
return new Promise((resolve, reject) => {
let genKeyType;
let genOpts;
switch (namedCurve) {
case 'NODE-ED25519':
genKeyType = 'ed25519';
break;
case 'NODE-ED448':
genKeyType = 'ed448';
break;
case 'NODE-X25519':
genKeyType = 'x25519';
break;
case 'NODE-X448':
genKeyType = 'x448';
break;
default:
genKeyType = 'ec';
genOpts = { namedCurve };
break;
}
generateKeyPair(genKeyType, genOpts, (err, pubKey, privKey) => {
if (err) {
return reject(lazyDOMException(
'The operation failed for an operation-specific reason',
'OperationError'));
}
const algorithm = { name, namedCurve };
let publicUsages;
let privateUsages;
switch (name) {
case 'NODE-ED25519':
// Fall through
case 'NODE-ED448':
// Fall through
case 'ECDSA':
publicUsages = getUsagesUnion(usageSet, 'verify');
privateUsages = getUsagesUnion(usageSet, 'sign');
break;
case 'ECDH':
publicUsages = [];
privateUsages = getUsagesUnion(usageSet, 'deriveKey', 'deriveBits');
break;
}
const publicKey =
new InternalCryptoKey(
pubKey,
algorithm,
publicUsages,
true);
const privateKey =
new InternalCryptoKey(
privKey,
algorithm,
privateUsages,
extractable);
resolve({ publicKey, privateKey });
});
});
}
function ecExportKey(key, format) {
return jobPromise(new ECKeyExportJob(
kCryptoJobAsync,
format,
key[kKeyObject][kHandle]));
}
async function ecImportKey(
format,
keyData,
algorithm,
extractable,
keyUsages) {
const { name, namedCurve } = algorithm;
validateString(namedCurve, 'algorithm.namedCurve');
validateOneOf(
namedCurve,
'algorithm.namedCurve',
ObjectKeys(kNamedCurveAliases));
let keyObject;
const usagesSet = new SafeSet(keyUsages);
let checkNamedCurve = true;
switch (format) {
case 'node.keyObject': {
if (!isKeyObject(keyData))
throw new ERR_INVALID_ARG_TYPE('keyData', 'KeyObject', keyData);
if (keyData.type === 'secret')
throw lazyDOMException('Invalid key type', 'InvalidAccessException');
switch (namedCurve) {
case 'NODE-X25519':
// Fall through
case 'NODE-X448':
if (algorithm.name !== 'ECDH')
throw lazyDOMException('Invalid algorithm name.', 'DataError');
break;
case 'NODE-ED25519':
// Fall through
case 'NODE-ED448':
if (algorithm.name !== namedCurve)
throw lazyDOMException('Invalid algorithm name.', 'DataError');
break;
}
verifyAcceptableEcKeyUse(name, keyData.type, usagesSet);
keyObject = keyData;
break;
}
case 'spki': {
verifyAcceptableEcKeyUse(name, 'public', usagesSet);
keyObject = createPublicKey({
key: keyData,
format: 'der',
type: 'spki'
});
break;
}
case 'pkcs8': {
verifyAcceptableEcKeyUse(name, 'private', usagesSet);
keyObject = createPrivateKey({
key: keyData,
format: 'der',
type: 'pkcs8'
});
break;
}
case 'jwk': {
let curve;
if (keyData == null || typeof keyData !== 'object')
throw lazyDOMException('Invalid JWK keyData', 'DataError');
switch (keyData.kty) {
case 'OKP': {
const isPublic = keyData.d === undefined;
let type;
switch (namedCurve) {
case 'NODE-ED25519':
// Fall through
case 'NODE-ED448':
type = `NODE-${keyData.crv.toUpperCase()}`;
break;
case 'NODE-X25519':
// Fall through
case 'NODE-X448':
type = 'ECDH';
break;
}
if (algorithm.name !== type)
throw lazyDOMException('Invalid algorithm name.', 'DataError');
verifyAcceptableEcKeyUse(
type,
isPublic ? 'public' : 'private',
usagesSet);
keyObject = createECRawKey(
namedCurve,
Buffer.from(
isPublic ? keyData.x : keyData.d,
'base64'),
isPublic);
break;
}
default: {
if (keyData.kty !== 'EC')
throw lazyDOMException('Invalid key type', 'DataError');
if (keyData.d !== undefined) {
verifyAcceptableEcKeyUse(name, 'private', usagesSet);
} else {
verifyAcceptableEcKeyUse(name, 'public', usagesSet);
}
if (usagesSet.size > 0 && keyData.use !== undefined) {
if (algorithm.name === 'ECDSA' && keyData.use !== 'sig')
throw lazyDOMException('Invalid use type', 'DataError');
if (algorithm.name === 'ECDH' && keyData.use !== 'enc')
throw lazyDOMException('Invalid use type', 'DataError');
}
validateKeyOps(keyData.key_ops, usagesSet);
if (keyData.ext !== undefined &&
keyData.ext === false &&
extractable === true) {
throw lazyDOMException('JWK is not extractable', 'DataError');
}
if (algorithm.name === 'ECDSA' && keyData.alg !== undefined) {
if (typeof keyData.alg !== 'string')
throw lazyDOMException('Invalid alg', 'DataError');
switch (keyData.alg) {
case 'ES256': curve = 'P-256'; break;
case 'ES384': curve = 'P-384'; break;
case 'ES512': curve = 'P-521'; break;
}
if (curve !== namedCurve)
throw lazyDOMException('Named curve mismatch', 'DataError');
}
const handle = new KeyObjectHandle();
const type = handle.initJwk(keyData, namedCurve);
if (type === undefined)
throw lazyDOMException('Invalid JWK keyData', 'DataError');
keyObject = type === kKeyTypePrivate ?
new PrivateKeyObject(handle) :
new PublicKeyObject(handle);
}
}
break;
}
case 'raw': {
switch (namedCurve) {
case 'NODE-X25519':
// Fall through
case 'NODE-X448':
if (algorithm.public !== undefined)
validateBoolean(algorithm.public, 'algorithm.public');
if (algorithm.name !== 'ECDH')
throw lazyDOMException('Invalid algorithm name.', 'DataError');
verifyAcceptableEcKeyUse(
algorithm.name,
algorithm.public === true ? 'public' : 'private',
usagesSet);
keyObject = createECRawKey(namedCurve, keyData, algorithm.public);
break;
case 'NODE-ED25519':
// Fall through
case 'NODE-ED448':
if (algorithm.public !== undefined)
validateBoolean(algorithm.public, 'algorithm.public');
if (algorithm.name !== namedCurve)
throw lazyDOMException('Invalid algorithm name.', 'DataError');
verifyAcceptableEcKeyUse(
algorithm.name,
algorithm.public === true ? 'public' : 'private',
usagesSet);
keyObject = createECRawKey(namedCurve, keyData, algorithm.public);
break;
default:
verifyAcceptableEcKeyUse(name, 'public', usagesSet);
keyObject = createECPublicKeyRaw(namedCurve, keyData);
}
if (keyObject === undefined)
throw lazyDOMException('Unable to import EC key', 'OperationError');
break;
}
}
switch (algorithm.name) {
case 'ECDSA':
if (keyObject.asymmetricKeyType !== 'ec')
throw lazyDOMException('Invalid key type', 'DataError');
break;
case 'ECDH':
if (algorithm.namedCurve === 'NODE-X25519') {
if (keyObject.asymmetricKeyType !== 'x25519')
throw lazyDOMException('Invalid key type', 'DataError');
checkNamedCurve = false;
} else if (algorithm.namedCurve === 'NODE-X448') {
if (keyObject.asymmetricKeyType !== 'x448')
throw lazyDOMException('Invalid key type', 'DataError');
checkNamedCurve = false;
} else if (keyObject.asymmetricKeyType !== 'ec') {
throw lazyDOMException('Invalid key type', 'DataError');
}
break;
case 'NODE-ED25519':
if (keyObject.asymmetricKeyType !== 'ed25519')
throw lazyDOMException('Invalid key type', 'DataError');
checkNamedCurve = false;
break;
case 'NODE-ED448':
if (keyObject.asymmetricKeyType !== 'ed448')
throw lazyDOMException('Invalid key type', 'DataError');
checkNamedCurve = false;
break;
}
if (checkNamedCurve) {
const {
namedCurve: checkNamedCurve
} = keyObject[kHandle].keyDetail({});
if (kNamedCurveAliases[namedCurve] !== checkNamedCurve)
throw lazyDOMException('Named curve mismatch', 'DataError');
}
return new InternalCryptoKey(
keyObject,
{ name, namedCurve },
keyUsages,
extractable);
}
function ecdsaSignVerify(key, data, { name, hash }, signature) {
const mode = signature === undefined ? kSignJobModeSign : kSignJobModeVerify;
const type = mode === kSignJobModeSign ? 'private' : 'public';
if (key.type !== type)
throw lazyDOMException(`Key must be a ${type} key`, 'InvalidAccessError');
let hashname;
switch (name) {
case 'NODE-ED25519':
// Fall through
case 'NODE-ED448':
if (hash !== undefined)
throw lazyDOMException(`Hash is not permitted for ${name}`);
break;
default:
if (hash === undefined)
throw new ERR_MISSING_OPTION('algorithm.hash');
hashname = normalizeHashName(hash.name);
}
return jobPromise(new SignJob(
kCryptoJobAsync,
mode,
key[kKeyObject][kHandle],
undefined,
undefined,
undefined,
data,
hashname,
undefined, // Salt length, not used with ECDSA
undefined, // PSS Padding, not used with ECDSA
kSigEncP1363,
signature));
}
module.exports = {
ecExportKey,
ecImportKey,
ecGenerateKey,
ecdsaSignVerify,
};
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