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Current File : /var/www/html/wp-content/plugins/google-site-kit/third-party/google/auth/src/CredentialsLoader.php
<?php

/*
 * Copyright 2015 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
namespace Google\Site_Kit_Dependencies\Google\Auth;

use Google\Site_Kit_Dependencies\Google\Auth\Credentials\ExternalAccountCredentials;
use Google\Site_Kit_Dependencies\Google\Auth\Credentials\ImpersonatedServiceAccountCredentials;
use Google\Site_Kit_Dependencies\Google\Auth\Credentials\InsecureCredentials;
use Google\Site_Kit_Dependencies\Google\Auth\Credentials\ServiceAccountCredentials;
use Google\Site_Kit_Dependencies\Google\Auth\Credentials\UserRefreshCredentials;
use RuntimeException;
use UnexpectedValueException;
/**
 * CredentialsLoader contains the behaviour used to locate and find default
 * credentials files on the file system.
 */
abstract class CredentialsLoader implements \Google\Site_Kit_Dependencies\Google\Auth\GetUniverseDomainInterface, \Google\Site_Kit_Dependencies\Google\Auth\FetchAuthTokenInterface, \Google\Site_Kit_Dependencies\Google\Auth\UpdateMetadataInterface
{
    use UpdateMetadataTrait;
    const TOKEN_CREDENTIAL_URI = 'https://oauth2.googleapis.com/token';
    const ENV_VAR = 'GOOGLE_APPLICATION_CREDENTIALS';
    const QUOTA_PROJECT_ENV_VAR = 'GOOGLE_CLOUD_QUOTA_PROJECT';
    const WELL_KNOWN_PATH = 'gcloud/application_default_credentials.json';
    const NON_WINDOWS_WELL_KNOWN_PATH_BASE = '.config';
    const MTLS_WELL_KNOWN_PATH = '.secureConnect/context_aware_metadata.json';
    const MTLS_CERT_ENV_VAR = 'GOOGLE_API_USE_CLIENT_CERTIFICATE';
    /**
     * @param string $cause
     * @return string
     */
    private static function unableToReadEnv($cause)
    {
        $msg = 'Unable to read the credential file specified by ';
        $msg .= ' GOOGLE_APPLICATION_CREDENTIALS: ';
        $msg .= $cause;
        return $msg;
    }
    /**
     * @return bool
     */
    private static function isOnWindows()
    {
        return \strtoupper(\substr(\PHP_OS, 0, 3)) === 'WIN';
    }
    /**
     * Load a JSON key from the path specified in the environment.
     *
     * Load a JSON key from the path specified in the environment
     * variable GOOGLE_APPLICATION_CREDENTIALS. Return null if
     * GOOGLE_APPLICATION_CREDENTIALS is not specified.
     *
     * @return array<mixed>|null JSON key | null
     */
    public static function fromEnv()
    {
        $path = \getenv(self::ENV_VAR);
        if (empty($path)) {
            return null;
        }
        if (!\file_exists($path)) {
            $cause = 'file ' . $path . ' does not exist';
            throw new \DomainException(self::unableToReadEnv($cause));
        }
        $jsonKey = \file_get_contents($path);
        return \json_decode((string) $jsonKey, \true);
    }
    /**
     * Load a JSON key from a well known path.
     *
     * The well known path is OS dependent:
     *
     * * windows: %APPDATA%/gcloud/application_default_credentials.json
     * * others: $HOME/.config/gcloud/application_default_credentials.json
     *
     * If the file does not exist, this returns null.
     *
     * @return array<mixed>|null JSON key | null
     */
    public static function fromWellKnownFile()
    {
        $rootEnv = self::isOnWindows() ? 'APPDATA' : 'HOME';
        $path = [\getenv($rootEnv)];
        if (!self::isOnWindows()) {
            $path[] = self::NON_WINDOWS_WELL_KNOWN_PATH_BASE;
        }
        $path[] = self::WELL_KNOWN_PATH;
        $path = \implode(\DIRECTORY_SEPARATOR, $path);
        if (!\file_exists($path)) {
            return null;
        }
        $jsonKey = \file_get_contents($path);
        return \json_decode((string) $jsonKey, \true);
    }
    /**
     * Create a new Credentials instance.
     *
     * @param string|string[] $scope the scope of the access request, expressed
     *        either as an Array or as a space-delimited String.
     * @param array<mixed> $jsonKey the JSON credentials.
     * @param string|string[] $defaultScope The default scope to use if no
     *   user-defined scopes exist, expressed either as an Array or as a
     *   space-delimited string.
     *
     * @return ServiceAccountCredentials|UserRefreshCredentials|ImpersonatedServiceAccountCredentials|ExternalAccountCredentials
     */
    public static function makeCredentials($scope, array $jsonKey, $defaultScope = null)
    {
        if (!\array_key_exists('type', $jsonKey)) {
            throw new \InvalidArgumentException('json key is missing the type field');
        }
        if ($jsonKey['type'] == 'service_account') {
            // Do not pass $defaultScope to ServiceAccountCredentials
            return new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\ServiceAccountCredentials($scope, $jsonKey);
        }
        if ($jsonKey['type'] == 'authorized_user') {
            $anyScope = $scope ?: $defaultScope;
            return new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\UserRefreshCredentials($anyScope, $jsonKey);
        }
        if ($jsonKey['type'] == 'impersonated_service_account') {
            $anyScope = $scope ?: $defaultScope;
            return new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\ImpersonatedServiceAccountCredentials($anyScope, $jsonKey);
        }
        if ($jsonKey['type'] == 'external_account') {
            $anyScope = $scope ?: $defaultScope;
            return new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\ExternalAccountCredentials($anyScope, $jsonKey);
        }
        throw new \InvalidArgumentException('invalid value in the type field');
    }
    /**
     * Create an authorized HTTP Client from an instance of FetchAuthTokenInterface.
     *
     * @param FetchAuthTokenInterface $fetcher is used to fetch the auth token
     * @param array<mixed> $httpClientOptions (optional) Array of request options to apply.
     * @param callable $httpHandler (optional) http client to fetch the token.
     * @param callable $tokenCallback (optional) function to be called when a new token is fetched.
     * @return \GuzzleHttp\Client
     */
    public static function makeHttpClient(\Google\Site_Kit_Dependencies\Google\Auth\FetchAuthTokenInterface $fetcher, array $httpClientOptions = [], ?callable $httpHandler = null, ?callable $tokenCallback = null)
    {
        $middleware = new \Google\Site_Kit_Dependencies\Google\Auth\Middleware\AuthTokenMiddleware($fetcher, $httpHandler, $tokenCallback);
        $stack = \Google\Site_Kit_Dependencies\GuzzleHttp\HandlerStack::create();
        $stack->push($middleware);
        return new \Google\Site_Kit_Dependencies\GuzzleHttp\Client(['handler' => $stack, 'auth' => 'google_auth'] + $httpClientOptions);
    }
    /**
     * Create a new instance of InsecureCredentials.
     *
     * @return InsecureCredentials
     */
    public static function makeInsecureCredentials()
    {
        return new \Google\Site_Kit_Dependencies\Google\Auth\Credentials\InsecureCredentials();
    }
    /**
     * Fetch a quota project from the environment variable
     * GOOGLE_CLOUD_QUOTA_PROJECT. Return null if
     * GOOGLE_CLOUD_QUOTA_PROJECT is not specified.
     *
     * @return string|null
     */
    public static function quotaProjectFromEnv()
    {
        return \getenv(self::QUOTA_PROJECT_ENV_VAR) ?: null;
    }
    /**
     * Gets a callable which returns the default device certification.
     *
     * @throws UnexpectedValueException
     * @return callable|null
     */
    public static function getDefaultClientCertSource()
    {
        if (!($clientCertSourceJson = self::loadDefaultClientCertSourceFile())) {
            return null;
        }
        $clientCertSourceCmd = $clientCertSourceJson['cert_provider_command'];
        return function () use($clientCertSourceCmd) {
            $cmd = \array_map('escapeshellarg', $clientCertSourceCmd);
            \exec(\implode(' ', $cmd), $output, $returnVar);
            if (0 === $returnVar) {
                return \implode(\PHP_EOL, $output);
            }
            throw new \RuntimeException('"cert_provider_command" failed with a nonzero exit code');
        };
    }
    /**
     * Determines whether or not the default device certificate should be loaded.
     *
     * @return bool
     */
    public static function shouldLoadClientCertSource()
    {
        return \filter_var(\getenv(self::MTLS_CERT_ENV_VAR), \FILTER_VALIDATE_BOOLEAN);
    }
    /**
     * @return array{cert_provider_command:string[]}|null
     */
    private static function loadDefaultClientCertSourceFile()
    {
        $rootEnv = self::isOnWindows() ? 'APPDATA' : 'HOME';
        $path = \sprintf('%s/%s', \getenv($rootEnv), self::MTLS_WELL_KNOWN_PATH);
        if (!\file_exists($path)) {
            return null;
        }
        $jsonKey = \file_get_contents($path);
        $clientCertSourceJson = \json_decode((string) $jsonKey, \true);
        if (!$clientCertSourceJson) {
            throw new \UnexpectedValueException('Invalid client cert source JSON');
        }
        if (!isset($clientCertSourceJson['cert_provider_command'])) {
            throw new \UnexpectedValueException('cert source requires "cert_provider_command"');
        }
        if (!\is_array($clientCertSourceJson['cert_provider_command'])) {
            throw new \UnexpectedValueException('cert source expects "cert_provider_command" to be an array');
        }
        return $clientCertSourceJson;
    }
    /**
     * Get the universe domain from the credential. Defaults to "googleapis.com"
     * for all credential types which do not support universe domain.
     *
     * @return string
     */
    public function getUniverseDomain() : string
    {
        return self::DEFAULT_UNIVERSE_DOMAIN;
    }
}

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