initial

9 files changed, 859 insertions, 0 deletions

diff --git a/vendor/aws/aws-sdk-php/src/Token/BearerTokenAuthorization.php b/vendor/aws/aws-sdk-php/src/Token/BearerTokenAuthorization.php
new file mode 100644
index 0000000..7d830f3
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/BearerTokenAuthorization.php
@@ -0,0 +1,33 @@
+<?php
+namespace Aws\Token;
+
+use InvalidArgumentException;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Interface used to provide interchangeable strategies for adding authorization
+ * to requests using the various AWS signature protocols.
+ */
+class BearerTokenAuthorization implements TokenAuthorization
+{
+    /**
+     * Adds the specified token to a request by adding the required headers.
+     *
+     * @param RequestInterface     $request     Request to sign
+     * @param TokenInterface       $token       Token
+     *
+     * @return RequestInterface Returns the modified request.
+     */
+    public function authorizeRequest(
+        RequestInterface $request,
+        TokenInterface $token
+    ) {
+        if (empty($token) || empty($token->getToken())) {
+            throw new InvalidArgumentException(
+                "Cannot authorize a request with an empty token"
+            );
+        }
+        $accessToken = $token->getToken();
+        return $request->withHeader('Authorization', "Bearer {$accessToken}");
+    }
+}
diff --git a/vendor/aws/aws-sdk-php/src/Token/ParsesIniTrait.php b/vendor/aws/aws-sdk-php/src/Token/ParsesIniTrait.php
new file mode 100644
index 0000000..64afdb5
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/ParsesIniTrait.php
@@ -0,0 +1,44 @@
+<?php
+namespace Aws\Token;
+
+trait ParsesIniTrait
+{
+    /**
+     * Gets profiles from specified $filename, or default ini files.
+     */
+    private static function loadProfiles($filename)
+    {
+        $profileData = \Aws\parse_ini_file($filename, true, INI_SCANNER_RAW);
+
+        $configFilename = self::getHomeDir() . '/.aws/config';
+        $configProfileData = \Aws\parse_ini_file($configFilename, true, INI_SCANNER_RAW);
+        foreach ($configProfileData as $name => $profile) {
+            // standardize config profile names
+            $name = str_replace('profile ', '', $name);
+            if (!isset($profileData[$name])) {
+                $profileData[$name] = $profile;
+            }
+        }
+
+        return $profileData;
+    }
+
+    /**
+     * Gets the environment's HOME directory if available.
+     *
+     * @return null|string
+     */
+    private static function getHomeDir()
+    {
+        // On Linux/Unix-like systems, use the HOME environment variable
+        if ($homeDir = getenv('HOME')) {
+            return $homeDir;
+        }
+
+        // Get the HOMEDRIVE and HOMEPATH values for Windows hosts
+        $homeDrive = getenv('HOMEDRIVE');
+        $homePath = getenv('HOMEPATH');
+
+        return ($homeDrive && $homePath) ? $homeDrive . $homePath : null;
+    }
+}
diff --git a/vendor/aws/aws-sdk-php/src/Token/RefreshableTokenProviderInterface.php b/vendor/aws/aws-sdk-php/src/Token/RefreshableTokenProviderInterface.php
new file mode 100644
index 0000000..4c88f3f
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/RefreshableTokenProviderInterface.php
@@ -0,0 +1,23 @@
+<?php
+namespace Aws\Token;
+
+/**
+ * Provides access to an AWS token used for accessing AWS services
+ *
+ */
+interface RefreshableTokenProviderInterface
+{
+    /**
+     * Attempts to refresh this token object
+     *
+     * @return Token | Exception
+     */
+    public function refresh();
+
+    /**
+     * Check if a refresh should be attempted
+     *
+     * @return boolean
+     */
+    public function shouldAttemptRefresh();
+}
diff --git a/vendor/aws/aws-sdk-php/src/Token/SsoToken.php b/vendor/aws/aws-sdk-php/src/Token/SsoToken.php
new file mode 100644
index 0000000..4b453ef
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/SsoToken.php
@@ -0,0 +1,108 @@
+<?php
+namespace Aws\Token;
+
+/**
+ * Token that comes from the SSO provider
+ */
+class SsoToken extends Token
+{
+    private $refreshToken;
+    private $clientId;
+    private $clientSecret;
+    private $registrationExpiresAt;
+    private $region;
+    private $startUrl;
+
+    /**
+     * Constructs a new SSO token object, with the specified AWS
+     * token
+     *
+     * @param string $token   Security token to use
+     * @param int    $expires UNIX timestamp for when the token expires
+     * @param int    $refreshToken An opaque string returned by the sso-oidc service
+     * @param int    $clientId  The client ID generated when performing the registration portion of the OIDC authorization flow
+     * @param int    $clientSecret The client secret generated when performing the registration portion of the OIDC authorization flow
+     * @param int    $registrationExpiresAt The expiration time of the client registration (clientId and clientSecret)
+     * @param int    $region The configured sso_region for the profile that credentials are being resolved for
+     * @param int    $startUrl The configured sso_start_url for the profile that credentials are being resolved for
+     */
+    public function __construct(
+        $token,
+        $expires,
+        $refreshToken = null,
+        $clientId = null,
+        $clientSecret = null,
+        $registrationExpiresAt = null,
+        $region = null,
+        $startUrl = null
+    ) {
+        parent::__construct($token, $expires);
+        $this->refreshToken = $refreshToken;
+        $this->clientId = $clientId;
+        $this->clientSecret = $clientSecret;
+        $this->registrationExpiresAt = $registrationExpiresAt;
+        $this->region = $region;
+        $this->startUrl = $startUrl;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isExpired()
+    {
+        if (isset($this->registrationExpiresAt)
+            && time() >= $this->registrationExpiresAt
+        ) {
+            return false;
+        }
+        return $this->expires !== null && time() >= $this->expires;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getRefreshToken()
+    {
+        return $this->refreshToken;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getClientId()
+    {
+        return $this->clientId;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getClientSecret()
+    {
+        return $this->clientSecret;
+    }
+
+    /**
+     * @return int|null
+     */
+    public function getRegistrationExpiresAt()
+    {
+        return $this->registrationExpiresAt;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getRegion()
+    {
+        return $this->region;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getStartUrl()
+    {
+        return $this->startUrl;
+    }
+}
diff --git a/vendor/aws/aws-sdk-php/src/Token/SsoTokenProvider.php b/vendor/aws/aws-sdk-php/src/Token/SsoTokenProvider.php
new file mode 100644
index 0000000..7d8f4b4
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/SsoTokenProvider.php
@@ -0,0 +1,213 @@
+<?php
+namespace Aws\Token;
+
+use Aws\Exception\TokenException;
+use GuzzleHttp\Promise;
+
+/**
+ * Token that comes from the SSO provider
+ */
+class SsoTokenProvider implements RefreshableTokenProviderInterface
+{
+    use ParsesIniTrait;
+
+    const ENV_PROFILE = 'AWS_PROFILE';
+
+    private $ssoProfileName;
+    private $filename;
+    private $ssoOidcClient;
+
+    /**
+     * Constructs a new SSO token object, with the specified AWS
+     * token
+     *
+     * @param string $token   Security token to use
+     * @param int    $expires UNIX timestamp for when the token expires
+     */
+    public function __construct($ssoProfileName, $filename = null, $ssoOidcClient = null) {
+        $profileName = getenv(self::ENV_PROFILE) ?: 'default';
+        $this->ssoProfileName = !empty($ssoProfileName) ? $ssoProfileName : $profileName;
+        $this->filename =  !empty($filename)
+            ? $filename :
+            self::getHomeDir() . '/.aws/config';
+        $this->ssoOidcClient = $ssoOidcClient;
+    }
+
+    /*
+     * Loads cached sso credentials
+     *
+     * @return PromiseInterface
+     */
+    public function __invoke()
+    {
+        return Promise\Coroutine::of(function () {
+            if (!@is_readable($this->filename)) {
+                throw new TokenException("Cannot read token from $this->filename");
+            }
+            $profiles = self::loadProfiles($this->filename);
+            if (!isset($profiles[$this->ssoProfileName])) {
+                throw new TokenException("Profile {$this->ssoProfileName} does not exist in {$this->filename}.");
+            }
+            $ssoProfile = $profiles[$this->ssoProfileName];
+            if (empty($ssoProfile['sso_session'])) {
+                throw new TokenException(
+                    "Profile {$this->ssoProfileName} in {$this->filename} must contain an sso_session."
+                );
+            }
+
+            $sessionProfileName = 'sso-session ' . $ssoProfile['sso_session'];
+            if (empty($profiles[$sessionProfileName])) {
+                throw new TokenException(
+                    "Profile {$this->ssoProfileName} does not exist in {$this->filename}"
+                );
+            }
+
+            $sessionProfileData = $profiles[$sessionProfileName];
+            if (empty($sessionProfileData['sso_start_url'])
+                || empty($sessionProfileData['sso_region'])
+            ) {
+                throw new TokenException(
+                    "Profile {$this->ssoProfileName} in {$this->filename} must contain the following keys: "
+                    . "sso_start_url and sso_region."
+                );
+            }
+
+            $tokenLocation = self::getTokenLocation($ssoProfile['sso_session']);
+            if (!@is_readable($tokenLocation)) {
+                throw new TokenException("Unable to read token file at $tokenLocation");
+            }
+            $tokenData = $this->getTokenData($tokenLocation);
+            $this->validateTokenData($tokenLocation, $tokenData);
+            yield new SsoToken(
+                $tokenData['accessToken'],
+                $tokenData['expiresAt'],
+                isset($tokenData['refreshToken']) ? $tokenData['refreshToken'] : null,
+                isset($tokenData['clientId']) ? $tokenData['clientId'] : null,
+                isset($tokenData['clientSecret']) ? $tokenData['clientSecret'] : null,
+                isset($tokenData['registrationExpiresAt']) ? $tokenData['registrationExpiresAt'] : null,
+                isset($tokenData['region']) ? $tokenData['region'] : null,
+                isset($tokenData['startUrl']) ? $tokenData['startUrl'] : null
+            );
+        });
+    }
+
+    /**
+     * Refreshes the token
+     * @return mixed|null
+     */
+    public function refresh() {
+        try {
+            //try to reload from disk
+            $token = $this();
+            if (
+                $token instanceof SsoToken
+                && !$token->shouldAttemptRefresh()
+            ) {
+                return $token;
+            }
+        } finally {
+            //if reload from disk fails, try refreshing
+            $tokenLocation = self::getTokenLocation($this->ssoProfileName);
+            $tokenData = $this->getTokenData($tokenLocation);
+            if (
+                empty($this->ssoOidcClient)
+                || empty($tokenData['startUrl'])
+            ) {
+                throw new TokenException(
+                    "Cannot refresh this token without an 'ssooidcClient' "
+                    . "and a 'start_url'"
+                );
+            }
+            $response = $this->ssoOidcClient->createToken([
+                'clientId' => $tokenData['clientId'],
+                'clientSecret' => $tokenData['clientSecret'],
+                'grantType' => 'refresh_token', // REQUIRED
+                'refreshToken' => $tokenData['refreshToken'],
+            ]);
+            if ($response['@metadata']['statusCode'] == 200) {
+                $tokenData['accessToken'] = $response['accessToken'];
+                $tokenData['expiresAt'] = time () + $response['expiresIn'];
+                $tokenData['refreshToken'] = $response['refreshToken'];
+                $token = new SsoToken(
+                    $tokenData['accessToken'],
+                    $tokenData['expiresAt'],
+                    $tokenData['refreshToken'],
+                    isset($tokenData['clientId']) ? $tokenData['clientId'] : null,
+                    isset($tokenData['clientSecret']) ? $tokenData['clientSecret'] : null,
+                    isset($tokenData['registrationExpiresAt']) ? $tokenData['registrationExpiresAt'] : null,
+                    isset($tokenData['region']) ? $tokenData['region'] : null,
+                    isset($tokenData['startUrl']) ? $tokenData['startUrl'] : null                );
+
+                $this->writeNewTokenDataToDisk($tokenData, $tokenLocation);
+
+                return $token;
+            }
+        }
+    }
+
+    public function shouldAttemptRefresh()
+    {
+        $tokenLocation = self::getTokenLocation($this->ssoProfileName);
+        $tokenData = $this->getTokenData($tokenLocation);
+        return strtotime("-10 minutes") >= strtotime($tokenData['expiresAt']);
+    }
+
+    /**
+     * @param $sso_session
+     * @return string
+     */
+    public static function getTokenLocation($sso_session)
+    {
+        return self::getHomeDir()
+            . '/.aws/sso/cache/'
+            . utf8_encode(sha1($sso_session))
+            . ".json";
+    }
+
+    /**
+     * @param $tokenLocation
+     * @return array
+     */
+    function getTokenData($tokenLocation)
+    {
+        return json_decode(file_get_contents($tokenLocation), true);
+    }
+
+    /**
+     * @param $tokenData
+     * @param $tokenLocation
+     * @return mixed
+     */
+    private function validateTokenData($tokenLocation, $tokenData)
+    {
+        if (empty($tokenData['accessToken']) || empty($tokenData['expiresAt'])) {
+            throw new TokenException(
+                "Token file at {$tokenLocation} must contain an access token and an expiration"
+            );
+        }
+
+        try {
+            $expiration = strtotime($tokenData['expiresAt']);
+        } catch (\Exception $e) {
+            throw new TokenException("Cached SSO token returned an invalid expiration");
+        }
+        if ($expiration > time()) {
+            throw new TokenException("Cached SSO token returned an expired token");
+        }
+        return $tokenData;
+    }
+
+    /**
+     * @param array $tokenData
+     * @param string $tokenLocation
+     * @return void
+     */
+    private function writeNewTokenDataToDisk(array $tokenData, $tokenLocation)
+    {
+        $tokenData['expiresAt'] = gmdate(
+            'Y-m-d\TH:i:s\Z',
+            $tokenData['expiresAt']
+        );
+        file_put_contents($tokenLocation, json_encode(array_filter($tokenData)));
+    }
+}
diff --git a/vendor/aws/aws-sdk-php/src/Token/Token.php b/vendor/aws/aws-sdk-php/src/Token/Token.php
new file mode 100644
index 0000000..6d2c566
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/Token.php
@@ -0,0 +1,110 @@
+<?php
+namespace Aws\Token;
+
+use Aws\Token\TokenInterface;
+
+/**
+ * Basic implementation of the AWS Token interface that allows callers to
+ * pass in an AWS token in the constructor.
+ */
+class Token implements TokenInterface, \Serializable
+{
+    protected $token;
+    protected $expires;
+
+    /**
+     * Constructs a new basic token object, with the specified AWS
+     * token
+     *
+     * @param string $token   Security token to use
+     * @param int    $expires UNIX timestamp for when the token expires
+     */
+    public function __construct($token, $expires = null)
+    {
+        $this->token = $token;
+        $this->expires = $expires;
+    }
+
+    /**
+     * Sets the state of a token object
+     *
+     * @param array $state   array containing 'token' and 'expires'
+     */
+    public static function __set_state(array $state)
+    {
+        return new self(
+            $state['token'],
+            $state['expires']
+        );
+    }
+
+    /**
+     * @return string
+     */
+    public function getToken()
+    {
+        return $this->token;
+    }
+
+    /**
+     * @return int
+     */
+    public function getExpiration()
+    {
+        return $this->expires;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isExpired()
+    {
+        return $this->expires !== null && time() >= $this->expires;
+    }
+
+    /**
+     * @return array
+     */
+    public function toArray()
+    {
+        return [
+            'token'   => $this->token,
+            'expires' => $this->expires
+        ];
+    }
+
+    /**
+     * @return string
+     */
+    public function serialize()
+    {
+        return json_encode($this->__serialize());
+    }
+
+    /**
+     * Sets the state of the object from serialized json data
+     */
+    public function unserialize($serialized)
+    {
+        $data = json_decode($serialized, true);
+
+        $this->__unserialize($data);
+    }
+
+    /**
+     * @return array
+     */
+    public function __serialize()
+    {
+        return $this->toArray();
+    }
+
+    /**
+     *  Sets the state of this object from an array
+     */
+    public function __unserialize($data)
+    {
+        $this->token = $data['token'];
+        $this->expires = $data['expires'];
+    }
+}
diff --git a/vendor/aws/aws-sdk-php/src/Token/TokenAuthorization.php b/vendor/aws/aws-sdk-php/src/Token/TokenAuthorization.php
new file mode 100644
index 0000000..3fab516
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/TokenAuthorization.php
@@ -0,0 +1,24 @@
+<?php
+namespace Aws\Token;
+
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Interface used to provide interchangeable strategies for adding authorization
+ * to requests using the various AWS signature protocols.
+ */
+interface TokenAuthorization
+{
+    /**
+     * Adds the specified token to a request by adding the required headers.
+     *
+     * @param RequestInterface     $request     Request to sign
+     * @param TokenInterface       $token       Token
+     *
+     * @return RequestInterface Returns the modified request.
+     */
+    public function authorizeRequest(
+        RequestInterface $request,
+        TokenInterface $token
+    );
+}
diff --git a/vendor/aws/aws-sdk-php/src/Token/TokenInterface.php b/vendor/aws/aws-sdk-php/src/Token/TokenInterface.php
new file mode 100644
index 0000000..9b95d85
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/TokenInterface.php
@@ -0,0 +1,36 @@
+<?php
+namespace Aws\Token;
+
+/**
+ * Provides access to an AWS token used for accessing AWS services
+ */
+interface TokenInterface
+{
+    /**
+     * Returns the token this token object.
+     *
+     * @return string
+     */
+    public function getToken();
+
+    /**
+     * Get the UNIX timestamp in which the token will expire
+     *
+     * @return int|null
+     */
+    public function getExpiration();
+
+    /**
+     * Check if the token are expired
+     *
+     * @return bool
+     */
+    public function isExpired();
+
+    /**
+     * Converts the token to an associative array.
+     *
+     * @return array
+     */
+    public function toArray();
+}
diff --git a/vendor/aws/aws-sdk-php/src/Token/TokenProvider.php b/vendor/aws/aws-sdk-php/src/Token/TokenProvider.php
new file mode 100644
index 0000000..1d7014c
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/Token/TokenProvider.php
@@ -0,0 +1,268 @@
+<?php
+namespace Aws\Token;
+
+use Aws;
+use Aws\Api\DateTimeResult;
+use Aws\CacheInterface;
+use Aws\Exception\TokenException;
+use GuzzleHttp\Promise;
+
+/**
+ * Token providers are functions that accept no arguments and return a
+ * promise that is fulfilled with an {@see \Aws\Token\TokenInterface}
+ * or rejected with an {@see \Aws\Exception\TokenException}.
+ *
+ * <code>
+ * use Aws\Token\TokenProvider;
+ * $provider = TokenProvider::defaultProvider();
+ * // Returns a TokenInterface or throws.
+ * $token = $provider()->wait();
+ * </code>
+ *
+ * Token providers can be composed to create a token using conditional
+ * logic that can create different tokens in different environments. You
+ * can compose multiple providers into a single provider using
+ * {@see Aws\Token\TokenProvider::chain}. This function accepts
+ * providers as variadic arguments and returns a new function that will invoke
+ * each provider until a token is successfully returned.
+ */
+class TokenProvider
+{
+    use ParsesIniTrait;
+    const ENV_PROFILE = 'AWS_PROFILE';
+
+    /**
+     * Create a default token provider tha checks for cached a SSO token from
+     * the CLI
+     *
+     * This provider is automatically wrapped in a memoize function that caches
+     * previously provided tokens.
+     *
+     * @param array $config Optional array of token provider options.
+     *
+     * @return callable
+     */
+    public static function defaultProvider(array $config = [])
+    {
+
+        $cacheable = [
+            'sso',
+        ];
+
+        $defaultChain = [];
+
+        if (
+            !isset($config['use_aws_shared_config_files'])
+            || $config['use_aws_shared_config_files'] !== false
+        ) {
+            $profileName = getenv(self::ENV_PROFILE) ?: 'default';
+            $defaultChain['sso'] = self::sso(
+                $profileName,
+                self::getHomeDir() . '/.aws/config',
+                $config
+            );
+        }
+
+        if (isset($config['token'])
+            && $config['token'] instanceof CacheInterface
+        ) {
+            foreach ($cacheable as $provider) {
+                if (isset($defaultChain[$provider])) {
+                    $defaultChain[$provider] = self::cache(
+                        $defaultChain[$provider],
+                        $config['token'],
+                        'aws_cached_' . $provider . '_token'
+                    );
+                }
+            }
+        }
+
+        return self::memoize(
+            call_user_func_array(
+                [TokenProvider::class, 'chain'],
+                array_values($defaultChain)
+            )
+        );
+    }
+
+    /**
+     * Create a token provider function from a static token.
+     *
+     * @param TokenInterface $token
+     *
+     * @return callable
+     */
+    public static function fromToken(TokenInterface $token)
+    {
+        $promise = Promise\Create::promiseFor($token);
+
+        return function () use ($promise) {
+            return $promise;
+        };
+    }
+
+    /**
+     * Creates an aggregate token provider that invokes the provided
+     * variadic providers one after the other until a provider returns
+     * a token.
+     *
+     * @return callable
+     */
+    public static function chain()
+    {
+        $links = func_get_args();
+        //Common use case for when aws_shared_config_files is false
+        if (empty($links)) {
+            return function () {
+                return Promise\Create::promiseFor(false);
+            };
+        }
+
+        return function () use ($links) {
+            /** @var callable $parent */
+            $parent = array_shift($links);
+            $promise = $parent();
+            while ($next = array_shift($links)) {
+                $promise = $promise->otherwise($next);
+            }
+            return $promise;
+        };
+    }
+
+    /**
+     * Wraps a token provider and caches a previously provided token.
+     * Ensures that cached tokens are refreshed when they expire.
+     *
+     * @param callable $provider Token provider function to wrap.
+     * @return callable
+     */
+    public static function memoize(callable $provider)
+    {
+        return function () use ($provider) {
+            static $result;
+            static $isConstant;
+
+            // Constant tokens will be returned constantly.
+            if ($isConstant) {
+                return $result;
+            }
+
+            // Create the initial promise that will be used as the cached value
+            // until it expires.
+            if (null === $result) {
+                $result = $provider();
+            }
+
+            // Return a token that could expire and refresh when needed.
+            return $result
+                ->then(function (TokenInterface $token) use ($provider, &$isConstant, &$result) {
+                    // Determine if the token is constant.
+                    if (!$token->getExpiration()) {
+                        $isConstant = true;
+                        return $token;
+                    }
+
+                    if (!$token->isExpired()) {
+                        return $token;
+                    }
+                    return $result = $provider();
+                })
+                ->otherwise(function($reason) use (&$result) {
+                    // Cleanup rejected promise.
+                    $result = null;
+                    return Promise\Create::promiseFor(null);
+                });
+        };
+    }
+
+    /**
+     * Wraps a token provider and saves provided token in an
+     * instance of Aws\CacheInterface. Forwards calls when no token found
+     * in cache and updates cache with the results.
+     *
+     * @param callable $provider Token provider function to wrap
+     * @param CacheInterface $cache Cache to store the token
+     * @param string|null $cacheKey (optional) Cache key to use
+     *
+     * @return callable
+     */
+    public static function cache(
+        callable $provider,
+        CacheInterface $cache,
+        $cacheKey = null
+    ) {
+        $cacheKey = $cacheKey ?: 'aws_cached_token';
+
+        return function () use ($provider, $cache, $cacheKey) {
+            $found = $cache->get($cacheKey);
+            if (is_array($found) && isset($found['token'])) {
+                if (isset($found['token']) && $found['token'] instanceof TokenInterface) {
+                    $foundToken = $found['token'];
+                    if (!$foundToken->isExpired()) {
+                        return Promise\Create::promiseFor($foundToken);
+                    }
+                    if (isset($found['refreshMethod']) && is_callable($found['refreshMethod'])) {
+                        return Promise\Create::promiseFor($found['refreshMethod']());
+                    }
+                }
+            }
+
+            return $provider()
+                ->then(function (TokenInterface $token) use (
+                    $cache,
+                    $cacheKey
+                ) {
+                    $cache->set(
+                        $cacheKey,
+                        $token,
+                        null === $token->getExpiration() ?
+                            0 : $token->getExpiration() - time()
+                    );
+
+                    return $token;
+                });
+        };
+    }
+
+    /**
+     * Gets profiles from the ~/.aws/config ini file
+     */
+    private static function loadDefaultProfiles() {
+        $profiles = [];
+        $configFile = self::getHomeDir() . '/.aws/config';
+
+        if (file_exists($configFile)) {
+            $configProfileData = \Aws\parse_ini_file($configFile, true, INI_SCANNER_RAW);
+            foreach ($configProfileData as $name => $profile) {
+                // standardize config profile names
+                $name = str_replace('profile ', '', $name);
+                if (!isset($profiles[$name])) {
+                    $profiles[$name] = $profile;
+                }
+            }
+        }
+
+        return $profiles;
+    }
+
+    private static function reject($msg)
+    {
+        return new Promise\RejectedPromise(new TokenException($msg));
+    }
+
+    /**
+     * Token provider that creates a token from cached sso credentials
+     *
+     * @param string $ssoProfileName the name of the ini profile name
+     * @param string $filename the location of the ini file
+     * @param array $config configuration options
+     *
+     * @return SsoToken
+     * @see Aws\Token\SsoToken for $config details.
+     */
+    public static function sso($profileName, $filename, $config = [])
+    {
+        return new SsoTokenProvider($profileName, $filename, $config);
+    }
+}
+