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efrain |
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<?php
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namespace Aws\Credentials;
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use Aws\Exception\CredentialsException;
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use Aws\Result;
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use Aws\Sts\StsClient;
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use GuzzleHttp\Promise\PromiseInterface;
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/**
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* Credential provider that provides credentials via assuming a role
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* More Information, see: http://docs.aws.amazon.com/aws-sdk-php/v3/api/api-sts-2011-06-15.html#assumerole
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*/
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class AssumeRoleCredentialProvider
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{
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const ERROR_MSG = "Missing required 'AssumeRoleCredentialProvider' configuration option: ";
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/** @var StsClient */
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private $client;
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/** @var array */
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private $assumeRoleParams;
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/**
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* The constructor requires following configure parameters:
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* - client: a StsClient
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* - assume_role_params: Parameters used to make assumeRole call
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*
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* @param array $config Configuration options
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* @throws \InvalidArgumentException
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*/
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public function __construct(array $config = [])
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{
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if (!isset($config['assume_role_params'])) {
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throw new \InvalidArgumentException(self::ERROR_MSG . "'assume_role_params'.");
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}
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if (!isset($config['client'])) {
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throw new \InvalidArgumentException(self::ERROR_MSG . "'client'.");
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}
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$this->client = $config['client'];
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$this->assumeRoleParams = $config['assume_role_params'];
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}
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/**
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* Loads assume role credentials.
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*
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* @return PromiseInterface
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*/
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public function __invoke()
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{
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$client = $this->client;
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return $client->assumeRoleAsync($this->assumeRoleParams)
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->then(function (Result $result) {
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return $this->client->createCredentials($result);
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})->otherwise(function (\RuntimeException $exception) {
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throw new CredentialsException(
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"Error in retrieving assume role credentials.",
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0,
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$exception
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);
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});
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}
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}
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