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const {
ArrayFrom,
ArrayPrototypeSlice,
ObjectDefineProperty,
ObjectSetPrototypeOf,
Symbol,
Uint8Array,
} = primordials;
const {
KeyObjectHandle,
createNativeKeyObjectClass,
kKeyTypeSecret,
kKeyTypePublic,
kKeyTypePrivate,
kKeyFormatPEM,
kKeyFormatDER,
kKeyFormatJWK,
kKeyEncodingPKCS1,
kKeyEncodingPKCS8,
kKeyEncodingSPKI,
kKeyEncodingSEC1,
} = internalBinding('crypto');
const {
validateObject,
validateOneOf,
validateString,
} = require('internal/validators');
const {
codes: {
ERR_CRYPTO_INCOMPATIBLE_KEY_OPTIONS,
ERR_CRYPTO_INVALID_KEY_OBJECT_TYPE,
ERR_CRYPTO_INVALID_JWK,
ERR_ILLEGAL_CONSTRUCTOR,
ERR_INVALID_ARG_TYPE,
ERR_INVALID_ARG_VALUE,
ERR_OUT_OF_RANGE,
}
} = require('internal/errors');
const {
kHandle,
kKeyObject,
getArrayBufferOrView,
bigIntArrayToUnsignedBigInt,
} = require('internal/crypto/util');
const {
isAnyArrayBuffer,
isArrayBufferView,
} = require('internal/util/types');
const {
JSTransferable,
kClone,
kDeserialize,
} = require('internal/worker/js_transferable');
const {
customInspectSymbol: kInspect,
} = require('internal/util');
const { inspect } = require('internal/util/inspect');
const { Buffer } = require('buffer');
const kAlgorithm = Symbol('kAlgorithm');
const kExtractable = Symbol('kExtractable');
const kKeyType = Symbol('kKeyType');
const kKeyUsages = Symbol('kKeyUsages');
// Key input contexts.
const kConsumePublic = 0;
const kConsumePrivate = 1;
const kCreatePublic = 2;
const kCreatePrivate = 3;
const encodingNames = [];
for (const m of [[kKeyEncodingPKCS1, 'pkcs1'], [kKeyEncodingPKCS8, 'pkcs8'],
[kKeyEncodingSPKI, 'spki'], [kKeyEncodingSEC1, 'sec1']])
encodingNames[m[0]] = m[1];
// Creating the KeyObject class is a little complicated due to inheritance
// and that fact that KeyObjects should be transferrable between threads,
// which requires the KeyObject base class to be implemented in C++.
// The creation requires a callback to make sure that the NativeKeyObject
// base class cannot exist without the other KeyObject implementations.
const {
0: KeyObject,
1: SecretKeyObject,
2: PublicKeyObject,
3: PrivateKeyObject,
} = createNativeKeyObjectClass((NativeKeyObject) => {
// Publicly visible KeyObject class.
class KeyObject extends NativeKeyObject {
constructor(type, handle) {
if (type !== 'secret' && type !== 'public' && type !== 'private')
throw new ERR_INVALID_ARG_VALUE('type', type);
if (typeof handle !== 'object' || !(handle instanceof KeyObjectHandle))
throw new ERR_INVALID_ARG_TYPE('handle', 'object', handle);
super(handle);
this[kKeyType] = type;
ObjectDefineProperty(this, kHandle, {
__proto__: null,
value: handle,
enumerable: false,
configurable: false,
writable: false
});
}
get type() {
return this[kKeyType];
}
static from(key) {
if (!isCryptoKey(key))
throw new ERR_INVALID_ARG_TYPE('key', 'CryptoKey', key);
return key[kKeyObject];
}
equals(otherKeyObject) {
if (!isKeyObject(otherKeyObject)) {
throw new ERR_INVALID_ARG_TYPE(
'otherKeyObject', 'KeyObject', otherKeyObject);
}
return otherKeyObject.type === this.type &&
this[kHandle].equals(otherKeyObject[kHandle]);
}
}
class SecretKeyObject extends KeyObject {
constructor(handle) {
super('secret', handle);
}
get symmetricKeySize() {
return this[kHandle].getSymmetricKeySize();
}
export(options) {
if (options !== undefined) {
validateObject(options, 'options');
validateOneOf(
options.format, 'options.format', [undefined, 'buffer', 'jwk']);
if (options.format === 'jwk') {
return this[kHandle].exportJwk({}, false);
}
}
return this[kHandle].export();
}
}
const kAsymmetricKeyType = Symbol('kAsymmetricKeyType');
const kAsymmetricKeyDetails = Symbol('kAsymmetricKeyDetails');
function normalizeKeyDetails(details = {}) {
if (details.publicExponent !== undefined) {
return {
...details,
publicExponent:
bigIntArrayToUnsignedBigInt(new Uint8Array(details.publicExponent))
};
}
return details;
}
class AsymmetricKeyObject extends KeyObject {
// eslint-disable-next-line no-useless-constructor
constructor(type, handle) {
super(type, handle);
}
get asymmetricKeyType() {
return this[kAsymmetricKeyType] ||
(this[kAsymmetricKeyType] = this[kHandle].getAsymmetricKeyType());
}
get asymmetricKeyDetails() {
switch (this.asymmetricKeyType) {
case 'rsa':
case 'rsa-pss':
case 'dsa':
case 'ec':
return this[kAsymmetricKeyDetails] ||
(this[kAsymmetricKeyDetails] = normalizeKeyDetails(
this[kHandle].keyDetail({})
));
default:
return {};
}
}
}
class PublicKeyObject extends AsymmetricKeyObject {
constructor(handle) {
super('public', handle);
}
export(options) {
if (options && options.format === 'jwk') {
return this[kHandle].exportJwk({}, false);
}
const {
format,
type
} = parsePublicKeyEncoding(options, this.asymmetricKeyType);
return this[kHandle].export(format, type);
}
}
class PrivateKeyObject extends AsymmetricKeyObject {
constructor(handle) {
super('private', handle);
}
export(options) {
if (options && options.format === 'jwk') {
if (options.passphrase !== undefined) {
throw new ERR_CRYPTO_INCOMPATIBLE_KEY_OPTIONS(
'jwk', 'does not support encryption');
}
return this[kHandle].exportJwk({}, false);
}
const {
format,
type,
cipher,
passphrase
} = parsePrivateKeyEncoding(options, this.asymmetricKeyType);
return this[kHandle].export(format, type, cipher, passphrase);
}
}
return [KeyObject, SecretKeyObject, PublicKeyObject, PrivateKeyObject];
});
function parseKeyFormat(formatStr, defaultFormat, optionName) {
if (formatStr === undefined && defaultFormat !== undefined)
return defaultFormat;
else if (formatStr === 'pem')
return kKeyFormatPEM;
else if (formatStr === 'der')
return kKeyFormatDER;
else if (formatStr === 'jwk')
return kKeyFormatJWK;
throw new ERR_INVALID_ARG_VALUE(optionName, formatStr);
}
function parseKeyType(typeStr, required, keyType, isPublic, optionName) {
if (typeStr === undefined && !required) {
return undefined;
} else if (typeStr === 'pkcs1') {
if (keyType !== undefined && keyType !== 'rsa') {
throw new ERR_CRYPTO_INCOMPATIBLE_KEY_OPTIONS(
typeStr, 'can only be used for RSA keys');
}
return kKeyEncodingPKCS1;
} else if (typeStr === 'spki' && isPublic !== false) {
return kKeyEncodingSPKI;
} else if (typeStr === 'pkcs8' && isPublic !== true) {
return kKeyEncodingPKCS8;
} else if (typeStr === 'sec1' && isPublic !== true) {
if (keyType !== undefined && keyType !== 'ec') {
throw new ERR_CRYPTO_INCOMPATIBLE_KEY_OPTIONS(
typeStr, 'can only be used for EC keys');
}
return kKeyEncodingSEC1;
}
throw new ERR_INVALID_ARG_VALUE(optionName, typeStr);
}
function option(name, objName) {
return objName === undefined ?
`options.${name}` : `options.${objName}.${name}`;
}
function parseKeyFormatAndType(enc, keyType, isPublic, objName) {
const { format: formatStr, type: typeStr } = enc;
const isInput = keyType === undefined;
const format = parseKeyFormat(formatStr,
isInput ? kKeyFormatPEM : undefined,
option('format', objName));
const isRequired = (!isInput ||
format === kKeyFormatDER) &&
format !== kKeyFormatJWK;
const type = parseKeyType(typeStr,
isRequired,
keyType,
isPublic,
option('type', objName));
return { format, type };
}
function isStringOrBuffer(val) {
return typeof val === 'string' ||
isArrayBufferView(val) ||
isAnyArrayBuffer(val);
}
function parseKeyEncoding(enc, keyType, isPublic, objName) {
validateObject(enc, 'options');
const isInput = keyType === undefined;
const {
format,
type
} = parseKeyFormatAndType(enc, keyType, isPublic, objName);
let cipher, passphrase, encoding;
if (isPublic !== true) {
({ cipher, passphrase, encoding } = enc);
if (!isInput) {
if (cipher != null) {
if (typeof cipher !== 'string')
throw new ERR_INVALID_ARG_VALUE(option('cipher', objName), cipher);
if (format === kKeyFormatDER &&
(type === kKeyEncodingPKCS1 ||
type === kKeyEncodingSEC1)) {
throw new ERR_CRYPTO_INCOMPATIBLE_KEY_OPTIONS(
encodingNames[type], 'does not support encryption');
}
} else if (passphrase !== undefined) {
throw new ERR_INVALID_ARG_VALUE(option('cipher', objName), cipher);
}
}
if ((isInput && passphrase !== undefined &&
!isStringOrBuffer(passphrase)) ||
(!isInput && cipher != null && !isStringOrBuffer(passphrase))) {
throw new ERR_INVALID_ARG_VALUE(option('passphrase', objName),
passphrase);
}
}
if (passphrase !== undefined)
passphrase = getArrayBufferOrView(passphrase, 'key.passphrase', encoding);
return { format, type, cipher, passphrase };
}
// Parses the public key encoding based on an object. keyType must be undefined
// when this is used to parse an input encoding and must be a valid key type if
// used to parse an output encoding.
function parsePublicKeyEncoding(enc, keyType, objName) {
return parseKeyEncoding(enc, keyType, keyType ? true : undefined, objName);
}
// Parses the private key encoding based on an object. keyType must be undefined
// when this is used to parse an input encoding and must be a valid key type if
// used to parse an output encoding.
function parsePrivateKeyEncoding(enc, keyType, objName) {
return parseKeyEncoding(enc, keyType, false, objName);
}
function getKeyObjectHandle(key, ctx) {
if (ctx === kCreatePrivate) {
throw new ERR_INVALID_ARG_TYPE(
'key',
['string', 'ArrayBuffer', 'Buffer', 'TypedArray', 'DataView'],
key
);
}
if (key.type !== 'private') {
if (ctx === kConsumePrivate || ctx === kCreatePublic)
throw new ERR_CRYPTO_INVALID_KEY_OBJECT_TYPE(key.type, 'private');
if (key.type !== 'public') {
throw new ERR_CRYPTO_INVALID_KEY_OBJECT_TYPE(key.type,
'private or public');
}
}
return key[kHandle];
}
function getKeyTypes(allowKeyObject, bufferOnly = false) {
const types = [
'ArrayBuffer',
'Buffer',
'TypedArray',
'DataView',
'string', // Only if bufferOnly == false
'KeyObject', // Only if allowKeyObject == true && bufferOnly == false
'CryptoKey', // Only if allowKeyObject == true && bufferOnly == false
];
if (bufferOnly) {
return ArrayPrototypeSlice(types, 0, 4);
} else if (!allowKeyObject) {
return ArrayPrototypeSlice(types, 0, 5);
}
return types;
}
function getKeyObjectHandleFromJwk(key, ctx) {
validateObject(key, 'key');
validateOneOf(
key.kty, 'key.kty', ['RSA', 'EC', 'OKP']);
const isPublic = ctx === kConsumePublic || ctx === kCreatePublic;
if (key.kty === 'OKP') {
validateString(key.crv, 'key.crv');
validateOneOf(
key.crv, 'key.crv', ['Ed25519', 'Ed448', 'X25519', 'X448']);
validateString(key.x, 'key.x');
if (!isPublic)
validateString(key.d, 'key.d');
let keyData;
if (isPublic)
keyData = Buffer.from(key.x, 'base64');
else
keyData = Buffer.from(key.d, 'base64');
switch (key.crv) {
case 'Ed25519':
case 'X25519':
if (keyData.byteLength !== 32) {
throw new ERR_CRYPTO_INVALID_JWK();
}
break;
case 'Ed448':
if (keyData.byteLength !== 57) {
throw new ERR_CRYPTO_INVALID_JWK();
}
break;
case 'X448':
if (keyData.byteLength !== 56) {
throw new ERR_CRYPTO_INVALID_JWK();
}
break;
}
const handle = new KeyObjectHandle();
const keyType = isPublic ? kKeyTypePublic : kKeyTypePrivate;
if (!handle.initEDRaw(key.crv, keyData, keyType)) {
throw new ERR_CRYPTO_INVALID_JWK();
}
return handle;
}
if (key.kty === 'EC') {
validateString(key.crv, 'key.crv');
validateOneOf(
key.crv, 'key.crv', ['P-256', 'secp256k1', 'P-384', 'P-521']);
validateString(key.x, 'key.x');
validateString(key.y, 'key.y');
const jwk = {
kty: key.kty,
crv: key.crv,
x: key.x,
y: key.y
};
if (!isPublic) {
validateString(key.d, 'key.d');
jwk.d = key.d;
}
const handle = new KeyObjectHandle();
const type = handle.initJwk(jwk, jwk.crv);
if (type === undefined)
throw new ERR_CRYPTO_INVALID_JWK();
return handle;
}
// RSA
validateString(key.n, 'key.n');
validateString(key.e, 'key.e');
const jwk = {
kty: key.kty,
n: key.n,
e: key.e
};
if (!isPublic) {
validateString(key.d, 'key.d');
validateString(key.p, 'key.p');
validateString(key.q, 'key.q');
validateString(key.dp, 'key.dp');
validateString(key.dq, 'key.dq');
validateString(key.qi, 'key.qi');
jwk.d = key.d;
jwk.p = key.p;
jwk.q = key.q;
jwk.dp = key.dp;
jwk.dq = key.dq;
jwk.qi = key.qi;
}
const handle = new KeyObjectHandle();
const type = handle.initJwk(jwk);
if (type === undefined)
throw new ERR_CRYPTO_INVALID_JWK();
return handle;
}
function prepareAsymmetricKey(key, ctx) {
if (isKeyObject(key)) {
// Best case: A key object, as simple as that.
return { data: getKeyObjectHandle(key, ctx) };
} else if (isCryptoKey(key)) {
return { data: getKeyObjectHandle(key[kKeyObject], ctx) };
} else if (isStringOrBuffer(key)) {
// Expect PEM by default, mostly for backward compatibility.
return { format: kKeyFormatPEM, data: getArrayBufferOrView(key, 'key') };
} else if (typeof key === 'object') {
const { key: data, encoding, format } = key;
// The 'key' property can be a KeyObject as well to allow specifying
// additional options such as padding along with the key.
if (isKeyObject(data))
return { data: getKeyObjectHandle(data, ctx) };
else if (isCryptoKey(data))
return { data: getKeyObjectHandle(data[kKeyObject], ctx) };
else if (isJwk(data) && format === 'jwk')
return { data: getKeyObjectHandleFromJwk(data, ctx), format: 'jwk' };
// Either PEM or DER using PKCS#1 or SPKI.
if (!isStringOrBuffer(data)) {
throw new ERR_INVALID_ARG_TYPE(
'key.key',
getKeyTypes(ctx !== kCreatePrivate),
data);
}
const isPublic =
(ctx === kConsumePrivate || ctx === kCreatePrivate) ? false : undefined;
return {
data: getArrayBufferOrView(data, 'key', encoding),
...parseKeyEncoding(key, undefined, isPublic)
};
}
throw new ERR_INVALID_ARG_TYPE(
'key',
getKeyTypes(ctx !== kCreatePrivate),
key);
}
function preparePrivateKey(key) {
return prepareAsymmetricKey(key, kConsumePrivate);
}
function preparePublicOrPrivateKey(key) {
return prepareAsymmetricKey(key, kConsumePublic);
}
function prepareSecretKey(key, encoding, bufferOnly = false) {
if (!bufferOnly) {
if (isKeyObject(key)) {
if (key.type !== 'secret')
throw new ERR_CRYPTO_INVALID_KEY_OBJECT_TYPE(key.type, 'secret');
return key[kHandle];
} else if (isCryptoKey(key)) {
if (key.type !== 'secret')
throw new ERR_CRYPTO_INVALID_KEY_OBJECT_TYPE(key.type, 'secret');
return key[kKeyObject][kHandle];
}
}
if (typeof key !== 'string' &&
!isArrayBufferView(key) &&
!isAnyArrayBuffer(key)) {
throw new ERR_INVALID_ARG_TYPE(
'key',
getKeyTypes(!bufferOnly, bufferOnly),
key);
}
return getArrayBufferOrView(key, 'key', encoding);
}
function createSecretKey(key, encoding) {
key = prepareSecretKey(key, encoding, true);
if (key.byteLength === 0)
throw new ERR_OUT_OF_RANGE('key.byteLength', '> 0', key.byteLength);
const handle = new KeyObjectHandle();
handle.init(kKeyTypeSecret, key);
return new SecretKeyObject(handle);
}
function createPublicKey(key) {
const { format, type, data, passphrase } =
prepareAsymmetricKey(key, kCreatePublic);
let handle;
if (format === 'jwk') {
handle = data;
} else {
handle = new KeyObjectHandle();
handle.init(kKeyTypePublic, data, format, type, passphrase);
}
return new PublicKeyObject(handle);
}
function createPrivateKey(key) {
const { format, type, data, passphrase } =
prepareAsymmetricKey(key, kCreatePrivate);
let handle;
if (format === 'jwk') {
handle = data;
} else {
handle = new KeyObjectHandle();
handle.init(kKeyTypePrivate, data, format, type, passphrase);
}
return new PrivateKeyObject(handle);
}
function isKeyObject(obj) {
return obj != null && obj[kKeyType] !== undefined;
}
// Our implementation of CryptoKey is a simple wrapper around a KeyObject
// that adapts it to the standard interface. This implementation also
// extends the JSTransferable class, allowing the CryptoKey to be cloned
// to Workers.
// TODO(@jasnell): Embedder environments like electron may have issues
// here similar to other things like URL. A chromium provided CryptoKey
// will not be recognized as a Node.js CryptoKey, and vice versa. It
// would be fantastic if we could find a way of making those interop.
class CryptoKey extends JSTransferable {
constructor() {
throw new ERR_ILLEGAL_CONSTRUCTOR();
}
[kInspect](depth, options) {
if (depth < 0)
return this;
const opts = {
...options,
depth: options.depth == null ? null : options.depth - 1
};
return `CryptoKey ${inspect({
type: this.type,
extractable: this.extractable,
algorithm: this.algorithm,
usages: this.usages
}, opts)}`;
}
get type() {
return this[kKeyObject].type;
}
get extractable() {
return this[kExtractable];
}
get algorithm() {
return this[kAlgorithm];
}
get usages() {
return ArrayFrom(this[kKeyUsages]);
}
[kClone]() {
const keyObject = this[kKeyObject];
const algorithm = this.algorithm;
const extractable = this.extractable;
const usages = this.usages;
return {
data: {
keyObject,
algorithm,
usages,
extractable,
},
deserializeInfo: 'internal/crypto/keys:InternalCryptoKey'
};
}
[kDeserialize]({ keyObject, algorithm, usages, extractable }) {
this[kKeyObject] = keyObject;
this[kAlgorithm] = algorithm;
this[kKeyUsages] = usages;
this[kExtractable] = extractable;
}
}
// All internal code must use new InternalCryptoKey to create
// CryptoKey instances. The CryptoKey class is exposed to end
// user code but is not permitted to be constructed directly.
class InternalCryptoKey extends JSTransferable {
constructor(
keyObject,
algorithm,
keyUsages,
extractable) {
super();
// Using symbol properties here currently instead of private
// properties because (for now) the performance penalty of
// private fields is still too high.
this[kKeyObject] = keyObject;
this[kAlgorithm] = algorithm;
this[kExtractable] = extractable;
this[kKeyUsages] = keyUsages;
}
}
InternalCryptoKey.prototype.constructor = CryptoKey;
ObjectSetPrototypeOf(InternalCryptoKey.prototype, CryptoKey.prototype);
function isCryptoKey(obj) {
return obj != null && obj[kKeyObject] !== undefined;
}
function isJwk(obj) {
return obj != null && obj.kty !== undefined;
}
module.exports = {
// Public API.
createSecretKey,
createPublicKey,
createPrivateKey,
KeyObject,
CryptoKey,
InternalCryptoKey,
// These are designed for internal use only and should not be exposed.
parsePublicKeyEncoding,
parsePrivateKeyEncoding,
parseKeyEncoding,
preparePrivateKey,
preparePublicOrPrivateKey,
prepareSecretKey,
SecretKeyObject,
PublicKeyObject,
PrivateKeyObject,
isKeyObject,
isCryptoKey,
isJwk,
};
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