329 lines
10 KiB
PHP
329 lines
10 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014-2020 Spomky-Labs
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*
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* This software may be modified and distributed under the terms
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* of the MIT license. See the LICENSE file for details.
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*/
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namespace Jose\Component\KeyManagement;
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use function array_key_exists;
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use Base64Url\Base64Url;
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use function extension_loaded;
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use InvalidArgumentException;
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use function is_array;
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use function is_string;
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use Jose\Component\Core\JWK;
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use Jose\Component\Core\JWKSet;
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use Jose\Component\Core\Util\ECKey;
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use Jose\Component\KeyManagement\KeyConverter\KeyConverter;
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use Jose\Component\KeyManagement\KeyConverter\RSAKey;
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use RuntimeException;
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use Throwable;
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class JWKFactory
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{
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/**
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* Creates a RSA key with the given key size and additional values.
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*
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* @param int $size The key size in bits
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* @param array $values values to configure the key
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*
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* @throws InvalidArgumentException if the key has an invalid size
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* @throws InvalidArgumentException if it is not possible to create the key
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*/
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public static function createRSAKey(int $size, array $values = []): JWK
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{
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if (0 !== $size % 8) {
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throw new InvalidArgumentException('Invalid key size.');
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}
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if (512 > $size) {
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throw new InvalidArgumentException('Key length is too short. It needs to be at least 512 bits.');
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}
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$key = openssl_pkey_new([
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'private_key_bits' => $size,
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'private_key_type' => OPENSSL_KEYTYPE_RSA,
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]);
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if (false === $key) {
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throw new InvalidArgumentException('Unable to create the key');
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}
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$details = openssl_pkey_get_details($key);
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if (!is_array($details)) {
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throw new InvalidArgumentException('Unable to create the key');
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}
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$rsa = RSAKey::createFromKeyDetails($details['rsa']);
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$values = array_merge(
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$values,
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$rsa->toArray()
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);
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return new JWK($values);
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}
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/**
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* Creates a EC key with the given curve and additional values.
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*
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* @param string $curve The curve
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* @param array $values values to configure the key
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*/
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public static function createECKey(string $curve, array $values = []): JWK
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{
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return ECKey::createECKey($curve, $values);
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}
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/**
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* Creates a octet key with the given key size and additional values.
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*
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* @param int $size The key size in bits
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* @param array $values values to configure the key
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*
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* @throws InvalidArgumentException if the key has an invalid size
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*/
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public static function createOctKey(int $size, array $values = []): JWK
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{
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if (0 !== $size % 8) {
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throw new InvalidArgumentException('Invalid key size.');
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}
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$values = array_merge(
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$values,
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[
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'kty' => 'oct',
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'k' => Base64Url::encode(random_bytes($size / 8)),
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]
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);
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return new JWK($values);
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}
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/**
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* Creates a OKP key with the given curve and additional values.
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*
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* @param string $curve The curve
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* @param array $values values to configure the key
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*
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* @throws InvalidArgumentException if the extension "sobium" is not available
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* @throws InvalidArgumentException if the curve is not supported
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*/
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public static function createOKPKey(string $curve, array $values = []): JWK
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{
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if (!extension_loaded('sodium')) {
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throw new RuntimeException('The extension "sodium" is not available. Please install it to use this method');
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}
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switch ($curve) {
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case 'X25519':
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$keyPair = sodium_crypto_box_keypair();
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$secret = sodium_crypto_box_secretkey($keyPair);
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$x = sodium_crypto_box_publickey($keyPair);
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break;
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case 'Ed25519':
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$keyPair = sodium_crypto_sign_keypair();
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$secret = sodium_crypto_sign_secretkey($keyPair);
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$x = sodium_crypto_sign_publickey($keyPair);
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break;
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default:
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throw new InvalidArgumentException(sprintf('Unsupported "%s" curve', $curve));
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}
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$secretLength = mb_strlen($secret, '8bit');
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$d = mb_substr($secret, 0, -$secretLength / 2, '8bit');
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$values = array_merge(
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$values,
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[
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'kty' => 'OKP',
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'crv' => $curve,
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'd' => Base64Url::encode($d),
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'x' => Base64Url::encode($x),
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]
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);
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return new JWK($values);
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}
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/**
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* Creates a none key with the given additional values.
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* Please note that this key type is not pat of any specification.
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* It is used to prevent the use of the "none" algorithm with other key types.
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*
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* @param array $values values to configure the key
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*/
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public static function createNoneKey(array $values = []): JWK
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{
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$values = array_merge(
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$values,
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[
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'kty' => 'none',
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'alg' => 'none',
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'use' => 'sig',
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]
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);
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return new JWK($values);
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}
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/**
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* Creates a key from a Json string.
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*
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* @throws InvalidArgumentException if the key or keyset is not valid
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*
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* @return JWK|JWKSet
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*/
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public static function createFromJsonObject(string $value)
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{
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$json = json_decode($value, true);
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if (!is_array($json)) {
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throw new InvalidArgumentException('Invalid key or key set.');
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}
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return self::createFromValues($json);
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}
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/**
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* Creates a key or key set from the given input.
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*
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* @return JWK|JWKSet
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*/
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public static function createFromValues(array $values)
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{
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if (array_key_exists('keys', $values) && is_array($values['keys'])) {
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return JWKSet::createFromKeyData($values);
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}
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return new JWK($values);
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}
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/**
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* This method create a JWK object using a shared secret.
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*/
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public static function createFromSecret(string $secret, array $additional_values = []): JWK
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{
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$values = array_merge(
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$additional_values,
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[
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'kty' => 'oct',
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'k' => Base64Url::encode($secret),
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]
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);
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return new JWK($values);
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}
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/**
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* This method will try to load a X.509 certificate and convert it into a public key.
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*/
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public static function createFromCertificateFile(string $file, array $additional_values = []): JWK
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{
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$values = KeyConverter::loadKeyFromCertificateFile($file);
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$values = array_merge($values, $additional_values);
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return new JWK($values);
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}
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/**
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* Extract a keyfrom a key set identified by the given index .
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*
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* @param int|string $index
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*/
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public static function createFromKeySet(JWKSet $jwkset, $index): JWK
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{
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return $jwkset->get($index);
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}
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/**
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* This method will try to load a PKCS#12 file and convert it into a public key.
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*
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* @throws InvalidArgumentException if the certificate cannot be loaded
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*/
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public static function createFromPKCS12CertificateFile(string $file, ?string $secret = '', array $additional_values = []): JWK
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{
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try {
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$content = file_get_contents($file);
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if (!is_string($content)) {
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throw new RuntimeException('Unable to read the file.');
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}
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openssl_pkcs12_read($content, $certs, $secret);
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} catch (Throwable $throwable) {
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throw new RuntimeException('Unable to load the certificates.', $throwable->getCode(), $throwable);
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}
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if (!is_array($certs) || !array_key_exists('pkey', $certs)) {
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throw new RuntimeException('Unable to load the certificates.');
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}
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return self::createFromKey($certs['pkey'], null, $additional_values);
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}
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/**
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* This method will try to convert a X.509 certificate into a public key.
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*/
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public static function createFromCertificate(string $certificate, array $additional_values = []): JWK
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{
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$values = KeyConverter::loadKeyFromCertificate($certificate);
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$values = array_merge($values, $additional_values);
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return new JWK($values);
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}
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/**
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* This method will try to convert a X.509 certificate resource into a public key.
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*
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* @param resource $res
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*/
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public static function createFromX509Resource($res, array $additional_values = []): JWK
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{
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$values = KeyConverter::loadKeyFromX509Resource($res);
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$values = array_merge($values, $additional_values);
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return new JWK($values);
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}
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/**
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* This method will try to load and convert a key file into a JWK object.
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* If the key is encrypted, the password must be set.
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*/
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public static function createFromKeyFile(string $file, ?string $password = null, array $additional_values = []): JWK
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{
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$values = KeyConverter::loadFromKeyFile($file, $password);
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$values = array_merge($values, $additional_values);
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return new JWK($values);
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}
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/**
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* This method will try to load and convert a key into a JWK object.
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* If the key is encrypted, the password must be set.
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*/
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public static function createFromKey(string $key, ?string $password = null, array $additional_values = []): JWK
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{
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$values = KeyConverter::loadFromKey($key, $password);
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$values = array_merge($values, $additional_values);
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return new JWK($values);
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}
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/**
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* This method will try to load and convert a X.509 certificate chain into a public key.
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*
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* Be careful! The certificate chain is loaded, but it is NOT VERIFIED by any mean!
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* It is mandatory to verify the root CA or intermediate CA are trusted.
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* If not done, it may lead to potential security issues.
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*/
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public static function createFromX5C(array $x5c, array $additional_values = []): JWK
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{
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$values = KeyConverter::loadFromX5C($x5c);
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$values = array_merge($values, $additional_values);
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return new JWK($values);
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}
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}
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