@fungible-systems/webcrypto-expo/build/webcrypto.es.js

A WebCrypto Polyfill for Expo (React Native)

/**
 * Copyright (c) 2020 Peculiar Ventures, LLC
 */

import { Buffer as Buffer$1 } from 'buffer';
import * as core from 'webcrypto-core';
export { CryptoKey } from 'webcrypto-core';
import getRandomValues from 'expo-standard-web-crypto/build/getRandomValues';
import { __decorate } from 'tslib';
import { JsonProp, JsonPropTypes, JsonSerializer, JsonParser } from '@peculiar/json-schema';
import { Convert } from 'pvtsutils';
import crypto, { createHash } from 'crypto';
import '@peculiar/asn1-schema';
import { hashSha512, hashSha256 } from 'micro-stacks/crypto-sha';
import { hmacSha256Shim, hmacSha512Shim } from 'micro-stacks/crypto-hmac-sha';

const JsonBase64UrlConverter = {
    fromJSON: (value) => Buffer.from(Convert.FromBase64Url(value)),
    toJSON: (value) => Convert.ToBase64Url(value),
};

class CryptoKey extends core.CryptoKey {
    constructor() {
        super(...arguments);
        this.data = Buffer.alloc(0);
        this.algorithm = { name: '' };
        this.extractable = false;
        this.type = 'secret';
        this.usages = [];
        this.kty = 'oct';
        this.alg = '';
    }
}
__decorate([
    JsonProp({ name: 'ext', type: JsonPropTypes.Boolean, optional: true })
], CryptoKey.prototype, "extractable", void 0);
__decorate([
    JsonProp({ name: 'key_ops', type: JsonPropTypes.String, repeated: true, optional: true })
], CryptoKey.prototype, "usages", void 0);
__decorate([
    JsonProp({ type: JsonPropTypes.String })
], CryptoKey.prototype, "kty", void 0);
__decorate([
    JsonProp({ type: JsonPropTypes.String })
], CryptoKey.prototype, "alg", void 0);

class SymmetricKey extends CryptoKey {
    constructor() {
        super(...arguments);
        this.kty = 'oct';
        this.type = 'secret';
    }
}

class AesCryptoKey extends SymmetricKey {
    get alg() {
        switch (this.algorithm.name.toUpperCase()) {
            case 'AES-CBC':
                return `A${this.algorithm.length}CBC`;
            case 'AES-CTR':
                return `A${this.algorithm.length}CTR`;
            case 'AES-GCM':
                return `A${this.algorithm.length}GCM`;
            case 'AES-KW':
                return `A${this.algorithm.length}KW`;
            case 'AES-CMAC':
                return `A${this.algorithm.length}CMAC`;
            case 'AES-ECB':
                return `A${this.algorithm.length}ECB`;
            default:
                throw new core.AlgorithmError('Unsupported algorithm name');
        }
    }
    set alg(value) {
    }
}
__decorate([
    JsonProp({ name: 'k', converter: JsonBase64UrlConverter })
], AesCryptoKey.prototype, "data", void 0);

const keyStorage = new WeakMap();
function getCryptoKey(key) {
    const res = keyStorage.get(key);
    if (!res) {
        throw new core.OperationError('Cannot get CryptoKey from secure storage');
    }
    return res;
}
function setCryptoKey(value) {
    const key = core.CryptoKey.create(value.algorithm, value.type, value.extractable, value.usages);
    Object.freeze(key);
    keyStorage.set(key, value);
    return key;
}

class AesCrypto {
    static async generateKey(algorithm, extractable, keyUsages) {
        const key = new AesCryptoKey();
        key.algorithm = algorithm;
        key.extractable = extractable;
        key.usages = keyUsages;
        key.data = crypto.randomBytes(algorithm.length >> 3);
        return key;
    }
    static async exportKey(format, key) {
        if (!(key instanceof AesCryptoKey)) {
            throw new Error('key: Is not AesCryptoKey');
        }
        switch (format.toLowerCase()) {
            case 'jwk':
                return JsonSerializer.toJSON(key);
            case 'raw':
                return new Uint8Array(key.data).buffer;
            default:
                throw new core.OperationError("format: Must be 'jwk' or 'raw'");
        }
    }
    static async importKey(format, keyData, algorithm, extractable, keyUsages) {
        let key;
        switch (format.toLowerCase()) {
            case 'jwk':
                key = JsonParser.fromJSON(keyData, { targetSchema: AesCryptoKey });
                break;
            case 'raw':
                key = new AesCryptoKey();
                key.data = Buffer.from(keyData);
                break;
            default:
                throw new core.OperationError("format: Must be 'jwk' or 'raw'");
        }
        key.algorithm = algorithm;
        key.algorithm.length = key.data.length << 3;
        key.extractable = extractable;
        key.usages = keyUsages;
        switch (key.algorithm.length) {
            case 128:
            case 192:
            case 256:
                break;
            default:
                throw new core.OperationError('keyData: Is wrong key length');
        }
        return key;
    }
    static async encrypt(algorithm, key, data) {
        switch (algorithm.name.toUpperCase()) {
            case 'AES-CBC':
                return this.encryptAesCBC(algorithm, key, Buffer.from(data));
            case 'AES-CTR':
                return this.encryptAesCTR(algorithm, key, Buffer.from(data));
            case 'AES-GCM':
                return this.encryptAesGCM(algorithm, key, Buffer.from(data));
            case 'AES-KW':
                return this.encryptAesKW(algorithm, key, Buffer.from(data));
            case 'AES-ECB':
                return this.encryptAesECB(algorithm, key, Buffer.from(data));
            default:
                throw new core.OperationError('algorithm: Is not recognized');
        }
    }
    static async decrypt(algorithm, key, data) {
        if (!(key instanceof AesCryptoKey)) {
            throw new Error('key: Is not AesCryptoKey');
        }
        switch (algorithm.name.toUpperCase()) {
            case 'AES-CBC':
                return this.decryptAesCBC(algorithm, key, Buffer.from(data));
            case 'AES-CTR':
                return this.decryptAesCTR(algorithm, key, Buffer.from(data));
            case 'AES-GCM':
                return this.decryptAesGCM(algorithm, key, Buffer.from(data));
            case 'AES-KW':
                return this.decryptAesKW(algorithm, key, Buffer.from(data));
            case 'AES-ECB':
                return this.decryptAesECB(algorithm, key, Buffer.from(data));
            default:
                throw new core.OperationError('algorithm: Is not recognized');
        }
    }
    static async encryptAesCBC(algorithm, key, data) {
        const cipher = crypto.createCipheriv(`aes-${key.algorithm.length}-cbc`, key.data, new Uint8Array(algorithm.iv));
        let enc = cipher.update(data);
        enc = Buffer.concat([enc, cipher.final()]);
        const res = new Uint8Array(enc).buffer;
        return res;
    }
    static async decryptAesCBC(algorithm, key, data) {
        const decipher = crypto.createDecipheriv(`aes-${key.algorithm.length}-cbc`, key.data, new Uint8Array(algorithm.iv));
        let dec = decipher.update(data);
        dec = Buffer.concat([dec, decipher.final()]);
        return new Uint8Array(dec).buffer;
    }
    static async encryptAesCTR(algorithm, key, data) {
        const cipher = crypto.createCipheriv(`aes-${key.algorithm.length}-ctr`, key.data, Buffer.from(algorithm.counter));
        let enc = cipher.update(data);
        enc = Buffer.concat([enc, cipher.final()]);
        const res = new Uint8Array(enc).buffer;
        return res;
    }
    static async decryptAesCTR(algorithm, key, data) {
        const decipher = crypto.createDecipheriv(`aes-${key.algorithm.length}-ctr`, key.data, new Uint8Array(algorithm.counter));
        let dec = decipher.update(data);
        dec = Buffer.concat([dec, decipher.final()]);
        return new Uint8Array(dec).buffer;
    }
    static async encryptAesGCM(algorithm, key, data) {
        const cipher = crypto.createCipheriv(`aes-${key.algorithm.length}-gcm`, key.data, Buffer.from(algorithm.iv), {
            authTagLength: (algorithm.tagLength || 128) >> 3,
        });
        if (algorithm.additionalData) {
            cipher.setAAD(Buffer.from(algorithm.additionalData));
        }
        let enc = cipher.update(data);
        enc = Buffer.concat([enc, cipher.final(), cipher.getAuthTag()]);
        const res = new Uint8Array(enc).buffer;
        return res;
    }
    static async decryptAesGCM(algorithm, key, data) {
        const decipher = crypto.createDecipheriv(`aes-${key.algorithm.length}-gcm`, key.data, new Uint8Array(algorithm.iv));
        const tagLength = (algorithm.tagLength || 128) >> 3;
        const enc = data.slice(0, data.length - tagLength);
        const tag = data.slice(data.length - tagLength);
        if (algorithm.additionalData) {
            decipher.setAAD(Buffer.from(algorithm.additionalData));
        }
        decipher.setAuthTag(tag);
        let dec = decipher.update(enc);
        dec = Buffer.concat([dec, decipher.final()]);
        return new Uint8Array(dec).buffer;
    }
    static async encryptAesKW(algorithm, key, data) {
        const cipher = crypto.createCipheriv(`id-aes${key.algorithm.length}-wrap`, key.data, this.AES_KW_IV);
        let enc = cipher.update(data);
        enc = Buffer.concat([enc, cipher.final()]);
        return new Uint8Array(enc).buffer;
    }
    static async decryptAesKW(algorithm, key, data) {
        const decipher = crypto.createDecipheriv(`id-aes${key.algorithm.length}-wrap`, key.data, this.AES_KW_IV);
        let dec = decipher.update(data);
        dec = Buffer.concat([dec, decipher.final()]);
        return new Uint8Array(dec).buffer;
    }
    static async encryptAesECB(algorithm, key, data) {
        const cipher = crypto.createCipheriv(`aes-${key.algorithm.length}-ecb`, key.data, new Uint8Array(0));
        let enc = cipher.update(data);
        enc = Buffer.concat([enc, cipher.final()]);
        const res = new Uint8Array(enc).buffer;
        return res;
    }
    static async decryptAesECB(algorithm, key, data) {
        const decipher = crypto.createDecipheriv(`aes-${key.algorithm.length}-ecb`, key.data, new Uint8Array(0));
        let dec = decipher.update(data);
        dec = Buffer.concat([dec, decipher.final()]);
        return new Uint8Array(dec).buffer;
    }
}
AesCrypto.AES_KW_IV = Buffer.from('A6A6A6A6A6A6A6A6', 'hex');

class AesCbcProvider extends core.AesCbcProvider {
    async onGenerateKey(algorithm, extractable, keyUsages) {
        const key = await AesCrypto.generateKey({
            name: this.name,
            length: algorithm.length,
        }, extractable, keyUsages);
        return setCryptoKey(key);
    }
    async onEncrypt(algorithm, key, data) {
        return AesCrypto.encrypt(algorithm, getCryptoKey(key), new Uint8Array(data));
    }
    async onDecrypt(algorithm, key, data) {
        return AesCrypto.decrypt(algorithm, getCryptoKey(key), new Uint8Array(data));
    }
    async onExportKey(format, key) {
        return AesCrypto.exportKey(format, getCryptoKey(key));
    }
    async onImportKey(format, keyData, algorithm, extractable, keyUsages) {
        const key = await AesCrypto.importKey(format, keyData, { name: algorithm.name }, extractable, keyUsages);
        return setCryptoKey(key);
    }
    checkCryptoKey(key, keyUsage) {
        super.checkCryptoKey(key, keyUsage);
        if (!(getCryptoKey(key) instanceof AesCryptoKey)) {
            throw new TypeError('key: Is not a AesCryptoKey');
        }
    }
}

Buffer.from([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);
Buffer.from([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 135]);

class DesCryptoKey extends SymmetricKey {
    get alg() {
        switch (this.algorithm.name.toUpperCase()) {
            case 'DES-CBC':
                return `DES-CBC`;
            case 'DES-EDE3-CBC':
                return `3DES-CBC`;
            default:
                throw new core.AlgorithmError('Unsupported algorithm name');
        }
    }
    set alg(value) {
    }
}
__decorate([
    JsonProp({ name: 'k', converter: JsonBase64UrlConverter })
], DesCryptoKey.prototype, "data", void 0);

class DesCrypto {
    static async generateKey(algorithm, extractable, keyUsages) {
        const key = new DesCryptoKey();
        key.algorithm = algorithm;
        key.extractable = extractable;
        key.usages = keyUsages;
        key.data = crypto.randomBytes(algorithm.length >> 3);
        return key;
    }
    static async exportKey(format, key) {
        switch (format.toLowerCase()) {
            case 'jwk':
                return JsonSerializer.toJSON(key);
            case 'raw':
                return new Uint8Array(key.data).buffer;
            default:
                throw new core.OperationError("format: Must be 'jwk' or 'raw'");
        }
    }
    static async importKey(format, keyData, algorithm, extractable, keyUsages) {
        let key;
        switch (format.toLowerCase()) {
            case 'jwk':
                key = JsonParser.fromJSON(keyData, { targetSchema: DesCryptoKey });
                break;
            case 'raw':
                key = new DesCryptoKey();
                key.data = Buffer.from(keyData);
                break;
            default:
                throw new core.OperationError("format: Must be 'jwk' or 'raw'");
        }
        key.algorithm = algorithm;
        key.extractable = extractable;
        key.usages = keyUsages;
        return key;
    }
    static async encrypt(algorithm, key, data) {
        switch (algorithm.name.toUpperCase()) {
            case 'DES-CBC':
                return this.encryptDesCBC(algorithm, key, Buffer.from(data));
            case 'DES-EDE3-CBC':
                return this.encryptDesEDE3CBC(algorithm, key, Buffer.from(data));
            default:
                throw new core.OperationError('algorithm: Is not recognized');
        }
    }
    static async decrypt(algorithm, key, data) {
        if (!(key instanceof DesCryptoKey)) {
            throw new Error('key: Is not DesCryptoKey');
        }
        switch (algorithm.name.toUpperCase()) {
            case 'DES-CBC':
                return this.decryptDesCBC(algorithm, key, Buffer.from(data));
            case 'DES-EDE3-CBC':
                return this.decryptDesEDE3CBC(algorithm, key, Buffer.from(data));
            default:
                throw new core.OperationError('algorithm: Is not recognized');
        }
    }
    static async encryptDesCBC(algorithm, key, data) {
        const cipher = crypto.createCipheriv(`des-cbc`, key.data, new Uint8Array(algorithm.iv));
        let enc = cipher.update(data);
        enc = Buffer.concat([enc, cipher.final()]);
        const res = new Uint8Array(enc).buffer;
        return res;
    }
    static async decryptDesCBC(algorithm, key, data) {
        const decipher = crypto.createDecipheriv(`des-cbc`, key.data, new Uint8Array(algorithm.iv));
        let dec = decipher.update(data);
        dec = Buffer.concat([dec, decipher.final()]);
        return new Uint8Array(dec).buffer;
    }
    static async encryptDesEDE3CBC(algorithm, key, data) {
        const cipher = crypto.createCipheriv(`des-ede3-cbc`, key.data, Buffer.from(algorithm.iv));
        let enc = cipher.update(data);
        enc = Buffer.concat([enc, cipher.final()]);
        const res = new Uint8Array(enc).buffer;
        return res;
    }
    static async decryptDesEDE3CBC(algorithm, key, data) {
        const decipher = crypto.createDecipheriv(`des-ede3-cbc`, key.data, new Uint8Array(algorithm.iv));
        let dec = decipher.update(data);
        dec = Buffer.concat([dec, decipher.final()]);
        return new Uint8Array(dec).buffer;
    }
}

class DesCbcProvider extends core.DesProvider {
    constructor() {
        super(...arguments);
        this.keySizeBits = 64;
        this.ivSize = 8;
        this.name = 'DES-CBC';
    }
    async onGenerateKey(algorithm, extractable, keyUsages) {
        const key = await DesCrypto.generateKey({
            name: this.name,
            length: this.keySizeBits,
        }, extractable, keyUsages);
        return setCryptoKey(key);
    }
    async onEncrypt(algorithm, key, data) {
        return DesCrypto.encrypt(algorithm, getCryptoKey(key), new Uint8Array(data));
    }
    async onDecrypt(algorithm, key, data) {
        return DesCrypto.decrypt(algorithm, getCryptoKey(key), new Uint8Array(data));
    }
    async onExportKey(format, key) {
        return DesCrypto.exportKey(format, getCryptoKey(key));
    }
    async onImportKey(format, keyData, algorithm, extractable, keyUsages) {
        const key = await DesCrypto.importKey(format, keyData, { name: this.name, length: this.keySizeBits }, extractable, keyUsages);
        if (key.data.length !== this.keySizeBits >> 3) {
            throw new core.OperationError('keyData: Wrong key size');
        }
        return setCryptoKey(key);
    }
    checkCryptoKey(key, keyUsage) {
        super.checkCryptoKey(key, keyUsage);
        if (!(getCryptoKey(key) instanceof DesCryptoKey)) {
            throw new TypeError('key: Is not a DesCryptoKey');
        }
    }
}

class DesEde3CbcProvider extends core.DesProvider {
    constructor() {
        super(...arguments);
        this.keySizeBits = 192;
        this.ivSize = 8;
        this.name = 'DES-EDE3-CBC';
    }
    async onGenerateKey(algorithm, extractable, keyUsages) {
        const key = await DesCrypto.generateKey({
            name: this.name,
            length: this.keySizeBits,
        }, extractable, keyUsages);
        return setCryptoKey(key);
    }
    async onEncrypt(algorithm, key, data) {
        return DesCrypto.encrypt(algorithm, getCryptoKey(key), new Uint8Array(data));
    }
    async onDecrypt(algorithm, key, data) {
        return DesCrypto.decrypt(algorithm, getCryptoKey(key), new Uint8Array(data));
    }
    async onExportKey(format, key) {
        return DesCrypto.exportKey(format, getCryptoKey(key));
    }
    async onImportKey(format, keyData, algorithm, extractable, keyUsages) {
        const key = await DesCrypto.importKey(format, keyData, { name: this.name, length: this.keySizeBits }, extractable, keyUsages);
        if (key.data.length !== this.keySizeBits >> 3) {
            throw new core.OperationError('keyData: Wrong key size');
        }
        return setCryptoKey(key);
    }
    checkCryptoKey(key, keyUsage) {
        super.checkCryptoKey(key, keyUsage);
        if (!(getCryptoKey(key) instanceof DesCryptoKey)) {
            throw new TypeError('key: Is not a DesCryptoKey');
        }
    }
}

class ShaCrypto {
    static size(algorithm) {
        switch (algorithm.name.toUpperCase()) {
            case 'SHA-1':
                return 160;
            case 'SHA-256':
                return 256;
            case 'SHA-384':
                return 384;
            case 'SHA-512':
                return 512;
            default:
                throw new Error('Unrecognized name');
        }
    }
    static digest(algorithm, data) {
        const hash = crypto
            .createHash(algorithm.name.replace('-', ''))
            .update(Buffer.from(data))
            .digest();
        return new Uint8Array(hash).buffer;
    }
}

({
    [core.asn1.idEd448]: 'Ed448',
    ed448: core.asn1.idEd448,
    [core.asn1.idX448]: 'X448',
    x448: core.asn1.idX448,
    [core.asn1.idEd25519]: 'Ed25519',
    ed25519: core.asn1.idEd25519,
    [core.asn1.idX25519]: 'X25519',
    x25519: core.asn1.idX25519,
});

class Sha256Provider extends core.ProviderCrypto {
    constructor() {
        super(...arguments);
        this.name = 'SHA-256';
        this.usages = [];
    }
    async onDigest(algorithm, data) {
        return ShaCrypto.digest(algorithm, data);
    }
}

class Sha512Provider extends core.ProviderCrypto {
    constructor() {
        super(...arguments);
        this.name = 'SHA-512';
        this.usages = [];
    }
    async onDigest(algorithm, data) {
        return ShaCrypto.digest(algorithm, data);
    }
}

class PbkdfCryptoKey extends CryptoKey {
}

const MAX_ALLOC = Math.pow(2, 30) - 1;
function createHasher(alg) {
    let normalizedAlg;
    if (alg === 'rmd160') {
        normalizedAlg = 'ripemd160';
    }
    else {
        normalizedAlg = alg;
    }
    return (value) => {
        switch (normalizedAlg) {
            case 'sha256':
                return Buffer.from(hashSha256(value));
            case 'sha512':
                return Buffer.from(hashSha512(value));
            default: {
                return Buffer.from(createHash(normalizedAlg).update(value).digest());
            }
        }
    };
}
function getZeroes(zeros) {
    return Buffer.alloc(zeros);
}
const sizes = {
    md5: 16,
    sha1: 20,
    sha224: 28,
    sha256: 32,
    sha384: 48,
    sha512: 64,
    rmd160: 20,
    ripemd160: 20,
};
function toBuffer(bufferable) {
    if (bufferable instanceof Uint8Array || typeof bufferable === 'string') {
        return Buffer.from(bufferable);
    }
    else {
        return Buffer.from(bufferable.buffer);
    }
}
class Hmac {
    constructor(alg, key, saltLen) {
        this.hash = createHasher(alg);
        const blocksize = alg === 'sha512' || alg === 'sha384' ? 128 : 64;
        if (key.length > blocksize) {
            key = this.hash(key);
        }
        else if (key.length < blocksize) {
            key = Buffer.concat([key, getZeroes(blocksize - key.length)], blocksize);
        }
        const ipad = Buffer.allocUnsafe(blocksize + sizes[alg]);
        const opad = Buffer.allocUnsafe(blocksize + sizes[alg]);
        for (let i = 0; i < blocksize; i++) {
            ipad[i] = key[i] ^ 0x36;
            opad[i] = key[i] ^ 0x5c;
        }
        const ipad1 = Buffer.allocUnsafe(blocksize + saltLen + 4);
        ipad.copy(ipad1, 0, 0, blocksize);
        this.ipad1 = ipad1;
        this.ipad2 = ipad;
        this.opad = opad;
        this.alg = alg;
        this.blocksize = blocksize;
        this.size = sizes[alg];
    }
    run(data, ipad) {
        data.copy(ipad, this.blocksize);
        const h = this.hash(ipad);
        h.copy(this.opad, this.blocksize);
        return this.hash(this.opad);
    }
}
function pbkdf2Sync(password, salt, iterations, keylen, digest = 'sha1') {
    if (typeof iterations !== 'number' || iterations < 0) {
        throw new TypeError('Bad iterations');
    }
    if (typeof keylen !== 'number' || keylen < 0 || keylen > MAX_ALLOC) {
        throw new TypeError('Bad key length');
    }
    const bufferedPassword = toBuffer(password);
    const bufferedSalt = toBuffer(salt);
    const hmac = new Hmac(digest, bufferedPassword, bufferedSalt.length);
    const DK = Buffer.allocUnsafe(keylen);
    const block1 = Buffer.allocUnsafe(bufferedSalt.length + 4);
    bufferedSalt.copy(block1, 0, 0, bufferedSalt.length);
    let destPos = 0;
    const hLen = sizes[digest];
    const l = Math.ceil(keylen / hLen);
    for (let i = 1; i <= l; i++) {
        block1.writeUInt32BE(i, bufferedSalt.length);
        const T = hmac.run(block1, hmac.ipad1);
        let U = T;
        for (let j = 1; j < iterations; j++) {
            U = hmac.run(U, hmac.ipad2);
            for (let k = 0; k < hLen; k++)
                T[k] ^= U[k];
        }
        T.copy(DK, destPos);
        destPos += hLen;
    }
    return DK;
}
function pbkdf2(password, salt, iterations, keylen, digest = 'sha1', callback) {
    console.log('pbkdf2');
    setTimeout(() => {
        let err = null, res;
        try {
            res = pbkdf2Sync(password, salt, iterations, keylen, digest);
        }
        catch (e) {
            err = e;
        }
        if (err) {
            callback(err);
        }
        else {
            callback(null, res);
        }
    }, 0);
}

class Pbkdf2Provider extends core.Pbkdf2Provider {
    async onDeriveBits(algorithm, baseKey, length) {
        return new Promise((resolve, reject) => {
            const salt = Buffer.from(core.BufferSourceConverter.toArrayBuffer(algorithm.salt));
            const digest = algorithm.hash.name.replace('-', '').toLowerCase();
            const password = getCryptoKey(baseKey).data;
            const iterations = algorithm.iterations;
            const keyLength = length >> 3;
            pbkdf2(password, salt, iterations, keyLength, digest, (err, derivedBits) => {
                if (err)
                    reject(err);
                derivedBits && resolve(new Uint8Array(derivedBits).buffer);
            });
        });
    }
    async onImportKey(format, keyData, algorithm, extractable, keyUsages) {
        if (format === 'raw') {
            const key = new PbkdfCryptoKey();
            key.data = Buffer.from(keyData);
            key.algorithm = { name: this.name };
            key.extractable = false;
            key.usages = keyUsages;
            return setCryptoKey(key);
        }
        throw new core.OperationError("format: Must be 'raw'");
    }
    checkCryptoKey(key, keyUsage) {
        super.checkCryptoKey(key, keyUsage);
        if (!(getCryptoKey(key) instanceof PbkdfCryptoKey)) {
            throw new TypeError('key: Is not PBKDF CryptoKey');
        }
    }
}

class HmacCryptoKey extends CryptoKey {
    get alg() {
        const hash = this.algorithm.hash.name.toUpperCase();
        return `HS${hash.replace('SHA-', '')}`;
    }
    set alg(value) {
    }
}
__decorate([
    JsonProp({ name: 'k', converter: JsonBase64UrlConverter })
], HmacCryptoKey.prototype, "data", void 0);

class HmacProvider extends core.HmacProvider {
    async onGenerateKey(algorithm, extractable, keyUsages) {
        const length = ((algorithm.length || this.getDefaultLength(algorithm.hash.name)) >> 3) << 3;
        const key = new HmacCryptoKey();
        key.algorithm = {
            ...algorithm,
            length,
            name: this.name,
        };
        key.extractable = extractable;
        key.usages = keyUsages;
        key.data = crypto.randomBytes(length >> 3);
        return setCryptoKey(key);
    }
    async onSign(algorithm, key, data) {
        const hash = key.algorithm.hash.name.replace('-', '');
        let hmac;
        if (hash === 'SHA256')
            hmac = hmacSha256Shim(getCryptoKey(key).data, new Uint8Array(data));
        if (hash === 'SHA512')
            hmac = hmacSha512Shim(getCryptoKey(key).data, new Uint8Array(data));
        if (!hmac)
            hmac = crypto.createHmac(hash, getCryptoKey(key).data).update(new Uint8Array(data)).digest();
        return new Uint8Array(hmac).buffer;
    }
    async onVerify(algorithm, key, signature, data) {
        const hash = key.algorithm.hash.name.replace('-', '');
        let hmac;
        if (hash === 'SHA256')
            hmac = hmacSha256Shim(getCryptoKey(key).data, new Uint8Array(data));
        if (hash === 'SHA512')
            hmac = hmacSha512Shim(getCryptoKey(key).data, new Uint8Array(data));
        if (!hmac)
            hmac = crypto.createHmac(hash, getCryptoKey(key).data).update(new Uint8Array(data)).digest();
        return Buffer.from(hmac).compare(Buffer.from(signature)) === 0;
    }
    async onImportKey(format, keyData, algorithm, extractable, keyUsages) {
        let key;
        switch (format.toLowerCase()) {
            case 'jwk':
                key = JsonParser.fromJSON(keyData, { targetSchema: HmacCryptoKey });
                break;
            case 'raw':
                key = new HmacCryptoKey();
                key.data = Buffer.from(keyData);
                break;
            default:
                throw new core.OperationError("format: Must be 'jwk' or 'raw'");
        }
        key.algorithm = {
            hash: { name: algorithm.hash.name },
            name: this.name,
            length: key.data.length << 3,
        };
        key.extractable = extractable;
        key.usages = keyUsages;
        return setCryptoKey(key);
    }
    async onExportKey(format, key) {
        switch (format.toLowerCase()) {
            case 'jwk':
                return JsonSerializer.toJSON(getCryptoKey(key));
            case 'raw':
                return new Uint8Array(getCryptoKey(key).data).buffer;
            default:
                throw new core.OperationError("format: Must be 'jwk' or 'raw'");
        }
    }
    checkCryptoKey(key, keyUsage) {
        super.checkCryptoKey(key, keyUsage);
        if (!(getCryptoKey(key) instanceof HmacCryptoKey)) {
            throw new TypeError('key: Is not HMAC CryptoKey');
        }
    }
}

class SubtleCrypto extends core.SubtleCrypto {
    constructor() {
        super();
        this.providers.set(new AesCbcProvider());
        this.providers.set(new DesCbcProvider());
        this.providers.set(new DesEde3CbcProvider());
        this.providers.set(new Sha256Provider());
        this.providers.set(new Sha512Provider());
        this.providers.set(new Pbkdf2Provider());
        this.providers.set(new HmacProvider());
    }
}

class Crypto extends core.Crypto {
    constructor() {
        super(...arguments);
        this.subtle = new SubtleCrypto();
    }
    getRandomValues(array) {
        return getRandomValues(array);
    }
}

global.Buffer = Buffer$1;

export { Crypto };