new appraoch

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/EndpointProvider.php

@@ -0,0 +1,96 @@
+<?php
+namespace Aws\Endpoint;
+
+use Aws\Exception\UnresolvedEndpointException;
+
+/**
+ * Endpoint providers.
+ *
+ * An endpoint provider is a function that accepts a hash of endpoint options,
+ * including but not limited to "service" and "region" key value pairs. The
+ * endpoint provider function returns a hash of endpoint data, which MUST
+ * include an "endpoint" key value pair that represents the resolved endpoint
+ * or NULL if an endpoint cannot be determined.
+ *
+ * You can wrap your calls to an endpoint provider with the
+ * {@see EndpointProvider::resolve} function to ensure that an endpoint hash is
+ * created. If an endpoint hash is not created, then the resolve() function
+ * will throw an {@see Aws\Exception\UnresolvedEndpointException}.
+ *
+ *     use Aws\Endpoint\EndpointProvider;
+ *     $provider = EndpointProvider::defaultProvider();
+ *     // Returns an array or NULL.
+ *     $endpoint = $provider(['service' => 'ec2', 'region' => 'us-west-2']);
+ *     // Returns an endpoint array or throws.
+ *     $endpoint = EndpointProvider::resolve($provider, [
+ *         'service' => 'ec2',
+ *         'region'  => 'us-west-2'
+ *     ]);
+ *
+ * You can compose multiple providers into a single provider using
+ * {@see Aws\or_chain}. This function accepts providers as arguments and
+ * returns a new function that will invoke each provider until a non-null value
+ * is returned.
+ *
+ *     $a = function (array $args) {
+ *         if ($args['region'] === 'my-test-region') {
+ *             return ['endpoint' => 'http://localhost:123/api'];
+ *         }
+ *     };
+ *     $b = EndpointProvider::defaultProvider();
+ *     $c = \Aws\or_chain($a, $b);
+ *     $config = ['service' => 'ec2', 'region' => 'my-test-region'];
+ *     $res = $c($config);  // $a handles this.
+ *     $config['region'] = 'us-west-2';
+ *     $res = $c($config); // $b handles this.
+ */
+class EndpointProvider
+{
+    /**
+     * Resolves and endpoint provider and ensures a non-null return value.
+     *
+     * @param callable $provider Provider function to invoke.
+     * @param array    $args     Endpoint arguments to pass to the provider.
+     *
+     * @return array
+     * @throws UnresolvedEndpointException
+     */
+    public static function resolve(callable $provider, array $args = [])
+    {
+        $result = $provider($args);
+        if (is_array($result)) {
+            return $result;
+        }
+
+        throw new UnresolvedEndpointException(
+            'Unable to resolve an endpoint using the provider arguments: '
+            . json_encode($args) . '. Note: you can provide an "endpoint" '
+            . 'option to a client constructor to bypass invoking an endpoint '
+            . 'provider.');
+    }
+
+    /**
+     * Creates and returns the default SDK endpoint provider.
+     *
+     * @deprecated Use an instance of \Aws\Endpoint\Partition instead.
+     *
+     * @return callable
+     */
+    public static function defaultProvider()
+    {
+        return PartitionEndpointProvider::defaultProvider();
+    }
+
+    /**
+     * Creates and returns an endpoint provider that uses patterns from an
+     * array.
+     *
+     * @param array $patterns Endpoint patterns
+     *
+     * @return callable
+     */
+    public static function patterns(array $patterns)
+    {
+        return new PatternEndpointProvider($patterns);
+    }
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/Partition.php

@@ -0,0 +1,322 @@
+<?php
+namespace Aws\Endpoint;
+
+use ArrayAccess;
+use Aws\HasDataTrait;
+use Aws\Sts\RegionalEndpoints\ConfigurationProvider;
+use Aws\S3\RegionalEndpoint\ConfigurationProvider as S3ConfigurationProvider;
+use InvalidArgumentException as Iae;
+
+/**
+ * Default implementation of an AWS partition.
+ */
+final class Partition implements ArrayAccess, PartitionInterface
+{
+    use HasDataTrait;
+
+    private $stsLegacyGlobalRegions = [
+        'ap-northeast-1',
+        'ap-south-1',
+        'ap-southeast-1',
+        'ap-southeast-2',
+        'aws-global',
+        'ca-central-1',
+        'eu-central-1',
+        'eu-north-1',
+        'eu-west-1',
+        'eu-west-2',
+        'eu-west-3',
+        'sa-east-1',
+        'us-east-1',
+        'us-east-2',
+        'us-west-1',
+        'us-west-2',
+    ];
+
+    /**
+     * The partition constructor accepts the following options:
+     *
+     * - `partition`: (string, required) The partition name as specified in an
+     *   ARN (e.g., `aws`)
+     * - `partitionName`: (string) The human readable name of the partition
+     *   (e.g., "AWS Standard")
+     * - `dnsSuffix`: (string, required) The DNS suffix of the partition. This
+     *   value is used to determine how endpoints in the partition are resolved.
+     * - `regionRegex`: (string) A PCRE regular expression that specifies the
+     *   pattern that region names in the endpoint adhere to.
+     * - `regions`: (array, required) A map of the regions in the partition.
+     *   Each key is the region as present in a hostname (e.g., `us-east-1`),
+     *   and each value is a structure containing region information.
+     * - `defaults`: (array) A map of default key value pairs to apply to each
+     *   endpoint of the partition. Any value in an `endpoint` definition will
+     *   supersede any values specified in `defaults`.
+     * - `services`: (array, required) A map of service endpoint prefix name
+     *   (the value found in a hostname) to information about the service.
+     *
+     * @param array $definition
+     *
+     * @throws Iae if any required options are missing
+     */
+    public function __construct(array $definition)
+    {
+        foreach (['partition', 'regions', 'services', 'dnsSuffix'] as $key) {
+            if (!isset($definition[$key])) {
+                throw new Iae("Partition missing required $key field");
+            }
+        }
+
+        $this->data = $definition;
+    }
+
+    public function getName()
+    {
+        return $this->data['partition'];
+    }
+
+    /**
+     * @internal
+     * @return mixed
+     */
+    public function getDnsSuffix()
+    {
+        return $this->data['dnsSuffix'];
+    }
+
+    public function isRegionMatch($region, $service)
+    {
+        if (isset($this->data['regions'][$region])
+            || isset($this->data['services'][$service]['endpoints'][$region])
+        ) {
+            return true;
+        }
+
+        if (isset($this->data['regionRegex'])) {
+            return (bool) preg_match(
+                "@{$this->data['regionRegex']}@",
+                $region
+            );
+        }
+
+        return false;
+    }
+
+    public function getAvailableEndpoints(
+        $service,
+        $allowNonRegionalEndpoints = false
+    ) {
+        if ($this->isServicePartitionGlobal($service)) {
+            return [$this->getPartitionEndpoint($service)];
+        }
+
+        if (isset($this->data['services'][$service]['endpoints'])) {
+            $serviceRegions = array_keys(
+                $this->data['services'][$service]['endpoints']
+            );
+
+            return $allowNonRegionalEndpoints
+                ? $serviceRegions
+                : array_intersect($serviceRegions, array_keys(
+                    $this->data['regions']
+                ));
+        }
+
+        return [];
+    }
+
+    public function __invoke(array $args = [])
+    {
+        $service = isset($args['service']) ? $args['service'] : '';
+        $region = isset($args['region']) ? $args['region'] : '';
+        $scheme = isset($args['scheme']) ? $args['scheme'] : 'https';
+        $options = isset($args['options']) ? $args['options'] : [];
+        $data = $this->getEndpointData($service, $region, $options);
+        $variant = $this->getVariant($options, $data);
+        if (isset($variant['hostname'])) {
+            $template = $variant['hostname'];
+        } else {
+            $template = isset($data['hostname']) ? $data['hostname'] : '';
+        }
+        $dnsSuffix = isset($variant['dnsSuffix'])
+            ? $variant['dnsSuffix']
+            : $this->data['dnsSuffix'];
+        return [
+            'endpoint' => "{$scheme}://" . $this->formatEndpoint(
+                    $template,
+                    $service,
+                    $region,
+                    $dnsSuffix
+                ),
+            'signatureVersion' => $this->getSignatureVersion($data),
+            'signingRegion' => isset($data['credentialScope']['region'])
+                ? $data['credentialScope']['region']
+                : $region,
+            'signingName' => isset($data['credentialScope']['service'])
+                ? $data['credentialScope']['service']
+                : $service,
+        ];
+    }
+
+    private function getEndpointData($service, $region, $options)
+    {
+        $defaultRegion = $this->resolveRegion($service, $region, $options);
+        $data = isset($this->data['services'][$service]['endpoints'][$defaultRegion])
+            ? $this->data['services'][$service]['endpoints'][$defaultRegion]
+            : [];
+        $data += isset($this->data['services'][$service]['defaults'])
+            ? $this->data['services'][$service]['defaults']
+            : [];
+        $data += isset($this->data['defaults'])
+            ? $this->data['defaults']
+            : [];
+
+        return $data;
+    }
+
+    private function getSignatureVersion(array $data)
+    {
+        static $supportedBySdk = [
+            's3v4',
+            'v4',
+            'anonymous',
+        ];
+
+        $possibilities = array_intersect(
+            $supportedBySdk,
+            isset($data['signatureVersions'])
+                ? $data['signatureVersions']
+                : ['v4']
+        );
+
+        return array_shift($possibilities);
+    }
+
+    private function resolveRegion($service, $region, $options)
+    {
+        if (isset($this->data['services'][$service]['endpoints'][$region])
+            && $this->isFipsEndpointUsed($region)
+        ) {
+            return $region;
+        }
+
+        if ($this->isServicePartitionGlobal($service)
+            || $this->isStsLegacyEndpointUsed($service, $region, $options)
+            || $this->isS3LegacyEndpointUsed($service, $region, $options)
+        ) {
+            return $this->getPartitionEndpoint($service);
+        }
+
+        return $region;
+    }
+
+    private function isServicePartitionGlobal($service)
+    {
+        return isset($this->data['services'][$service]['isRegionalized'])
+            && false === $this->data['services'][$service]['isRegionalized']
+            && isset($this->data['services'][$service]['partitionEndpoint']);
+    }
+
+    /**
+     * STS legacy endpoints used for valid regions unless option is explicitly
+     * set to 'regional'
+     *
+     * @param string $service
+     * @param string $region
+     * @param array $options
+     * @return bool
+     */
+    private function isStsLegacyEndpointUsed($service, $region, $options)
+    {
+        return $service === 'sts'
+            && in_array($region, $this->stsLegacyGlobalRegions)
+            && (empty($options['sts_regional_endpoints'])
+                || ConfigurationProvider::unwrap(
+                    $options['sts_regional_endpoints']
+                )->getEndpointsType() !== 'regional'
+            );
+    }
+
+    /**
+     * S3 legacy us-east-1 endpoint used for valid regions unless option is explicitly
+     * set to 'regional'
+     *
+     * @param string $service
+     * @param string $region
+     * @param array $options
+     * @return bool
+     */
+    private function isS3LegacyEndpointUsed($service, $region, $options)
+    {
+        return $service === 's3'
+            && $region === 'us-east-1'
+            && (empty($options['s3_us_east_1_regional_endpoint'])
+                || S3ConfigurationProvider::unwrap(
+                    $options['s3_us_east_1_regional_endpoint']
+                )->getEndpointsType() !== 'regional'
+            );
+    }
+
+    private function getPartitionEndpoint($service)
+    {
+        return $this->data['services'][$service]['partitionEndpoint'];
+    }
+
+    private function formatEndpoint($template, $service, $region, $dnsSuffix)
+    {
+        return strtr($template, [
+            '{service}' => $service,
+            '{region}' => $region,
+            '{dnsSuffix}' => $dnsSuffix,
+        ]);
+    }
+
+    /**
+     * @param $region
+     * @return bool
+     */
+    private function isFipsEndpointUsed($region)
+    {
+        return strpos($region, "fips") !== false;
+    }
+
+    /**
+     * @param array $options
+     * @param array $data
+     * @return array
+     */
+    private function getVariant(array $options, array $data)
+    {
+        $variantTags = [];
+        if (isset($options['use_fips_endpoint'])) {
+            $useFips = $options['use_fips_endpoint'];
+            if (is_bool($useFips)) {
+                $useFips && $variantTags[] = 'fips';
+            } elseif ($useFips->isUseFipsEndpoint()) {
+                $variantTags[] = 'fips';
+            }
+        }
+        if (isset($options['use_dual_stack_endpoint'])) {
+            $useDualStack = $options['use_dual_stack_endpoint'];
+            if (is_bool($useDualStack)) {
+                $useDualStack && $variantTags[] = 'dualstack';
+            } elseif ($useDualStack->isUseDualStackEndpoint()) {
+                $variantTags[] = 'dualstack';
+            }
+        }
+        if (!empty($variantTags)) {
+            if (isset($data['variants'])) {
+                foreach ($data['variants'] as $variant) {
+                    if (array_count_values($variant['tags']) == array_count_values($variantTags)) {
+                        return $variant;
+                    }
+                }
+            }
+            if (isset($this->data['defaults']['variants'])) {
+                foreach ($this->data['defaults']['variants'] as $variant) {
+                    if (array_count_values($variant['tags']) == array_count_values($variantTags)) {
+                        return $variant;
+                    }
+                }
+            }
+        }
+    }
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/PartitionEndpointProvider.php

@@ -0,0 +1,130 @@
+<?php
+namespace Aws\Endpoint;
+
+use JmesPath\Env;
+
+class PartitionEndpointProvider
+{
+    /** @var Partition[] */
+    private $partitions;
+    /** @var string */
+    private $defaultPartition;
+    /** @var array  */
+    private $options;
+
+    /**
+     * The 'options' parameter accepts the following arguments:
+     *
+     * - sts_regional_endpoints: For STS legacy regions, set to 'regional' to
+     *   use regional endpoints, 'legacy' to use the legacy global endpoint.
+     *   Defaults to 'legacy'.
+     * - s3_us_east_1_regional_endpoint: For S3 us-east-1 region, set to 'regional'
+     *   to use the regional endpoint, 'legacy' to use the legacy global endpoint.
+     *   Defaults to 'legacy'.
+     *
+     * @param array $partitions
+     * @param string $defaultPartition
+     * @param array $options
+     */
+    public function __construct(
+        array $partitions,
+        $defaultPartition = 'aws',
+        $options = []
+    ) {
+        $this->partitions = array_map(function (array $definition) {
+            return new Partition($definition);
+        }, array_values($partitions));
+        $this->defaultPartition = $defaultPartition;
+        $this->options = $options;
+    }
+
+    public function __invoke(array $args = [])
+    {
+        $partition = $this->getPartition(
+            isset($args['region']) ? $args['region'] : '',
+            isset($args['service']) ? $args['service'] : ''
+        );
+        $args['options'] = $this->options;
+
+        return $partition($args);
+    }
+
+    /**
+     * Returns the partition containing the provided region or the default
+     * partition if no match is found.
+     *
+     * @param string $region
+     * @param string $service
+     *
+     * @return Partition
+     */
+    public function getPartition($region, $service)
+    {
+        foreach ($this->partitions as $partition) {
+            if ($partition->isRegionMatch($region, $service)) {
+                return $partition;
+            }
+        }
+
+        return $this->getPartitionByName($this->defaultPartition);
+    }
+
+    /**
+     * Returns the partition with the provided name or null if no partition with
+     * the provided name can be found.
+     *
+     * @param string $name
+     *
+     * @return Partition|null
+     */
+    public function getPartitionByName($name)
+    {
+        foreach ($this->partitions as $partition) {
+            if ($name === $partition->getName()) {
+                return $partition;
+            }
+        }
+    }
+
+    /**
+     * Creates and returns the default SDK partition provider.
+     *
+     * @param array $options
+     * @return PartitionEndpointProvider
+     */
+    public static function defaultProvider($options = [])
+    {
+        $data = \Aws\load_compiled_json(__DIR__ . '/../data/endpoints.json');
+        $prefixData = \Aws\load_compiled_json(__DIR__ . '/../data/endpoints_prefix_history.json');
+        $mergedData = self::mergePrefixData($data, $prefixData);
+
+        return new self($mergedData['partitions'], 'aws', $options);
+    }
+
+    /**
+     * Copy endpoint data for other prefixes used by a given service
+     *
+     * @param $data
+     * @param $prefixData
+     * @return array
+     */
+    public static function mergePrefixData($data, $prefixData)
+    {
+        $prefixGroups = $prefixData['prefix-groups'];
+
+        foreach ($data["partitions"] as $index => $partition) {
+            foreach ($prefixGroups as $current => $old) {
+                $serviceData = Env::search("services.\"{$current}\"", $partition);
+                if (!empty($serviceData)) {
+                    foreach ($old as $prefix) {
+                        if (empty(Env::search("services.\"{$prefix}\"", $partition))) {
+                            $data["partitions"][$index]["services"][$prefix] = $serviceData;
+                        }
+                    }
+                }
+            }
+        }
+
+        return $data;
+    }
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/PartitionInterface.php

@@ -0,0 +1,56 @@
+<?php
+namespace Aws\Endpoint;
+
+/**
+ * Represents a section of the AWS cloud.
+ */
+interface PartitionInterface
+{
+    /**
+     * Returns the partition's short name, e.g., 'aws,' 'aws-cn,' or
+     * 'aws-us-gov.'
+     *
+     * @return string
+     */
+    public function getName();
+
+    /**
+     * Determine if this partition contains the provided region. Include the
+     * name of the service to inspect non-regional endpoints
+     *
+     * @param string $region
+     * @param string $service
+     *
+     * @return bool
+     */
+    public function isRegionMatch($region, $service);
+
+    /**
+     * Return the endpoints supported by a given service.
+     *
+     * @param string    $service                    Identifier of the service
+     *                                              whose endpoints should be
+     *                                              listed (e.g., 's3' or 'ses')
+     * @param bool      $allowNonRegionalEndpoints  Set to `true` to include
+     *                                              endpoints that are not AWS
+     *                                              regions (e.g., 'local' for
+     *                                              DynamoDB or
+     *                                              'fips-us-gov-west-1' for S3)
+     * 
+     * @return string[]
+     */
+    public function getAvailableEndpoints(
+        $service,
+        $allowNonRegionalEndpoints = false
+    );
+
+    /**
+     * A partition must be invokable as an endpoint provider.
+     *
+     * @see EndpointProvider
+     * 
+     * @param array $args
+     * @return array
+     */
+    public function __invoke(array $args = []);
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/PatternEndpointProvider.php

@@ -0,0 +1,51 @@
+<?php
+namespace Aws\Endpoint;
+
+/**
+ * Provides endpoints based on an endpoint pattern configuration array.
+ */
+class PatternEndpointProvider
+{
+    /** @var array */
+    private $patterns;
+
+    /**
+     * @param array $patterns Hash of endpoint patterns mapping to endpoint
+     *                        configurations.
+     */
+    public function __construct(array $patterns)
+    {
+        $this->patterns = $patterns;
+    }
+
+    public function __invoke(array $args = [])
+    {
+        $service = isset($args['service']) ? $args['service'] : '';
+        $region = isset($args['region']) ? $args['region'] : '';
+        $keys = ["{$region}/{$service}", "{$region}/*", "*/{$service}", "*/*"];
+
+        foreach ($keys as $key) {
+            if (isset($this->patterns[$key])) {
+                return $this->expand(
+                    $this->patterns[$key],
+                    isset($args['scheme']) ? $args['scheme'] : 'https',
+                    $service,
+                    $region
+                );
+            }
+        }
+
+        return null;
+    }
+
+    private function expand(array $config, $scheme, $service, $region)
+    {
+        $config['endpoint'] = $scheme . '://'
+            . strtr($config['endpoint'], [
+                '{service}' => $service,
+                '{region}'  => $region
+            ]);
+
+        return $config;
+    }
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/UseDualstackEndpoint/Configuration.php

@@ -0,0 +1,41 @@
+<?php
+namespace Aws\Endpoint\UseDualstackEndpoint;
+
+use Aws;
+use Aws\Endpoint\UseDualstackEndpoint\Exception\ConfigurationException;
+
+class Configuration implements ConfigurationInterface
+{
+    private $useDualstackEndpoint;
+
+    public function __construct($useDualstackEndpoint, $region)
+    {
+        $this->useDualstackEndpoint = Aws\boolean_value($useDualstackEndpoint);
+        if (is_null($this->useDualstackEndpoint)) {
+            throw new ConfigurationException("'use_dual_stack_endpoint' config option"
+                . " must be a boolean value.");
+        }
+        if ($this->useDualstackEndpoint == true
+            && (strpos($region, "iso-") !== false || strpos($region, "-iso") !== false)
+        ) {
+            throw new ConfigurationException("Dual-stack is not supported in ISO regions");        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isUseDualstackEndpoint()
+    {
+        return $this->useDualstackEndpoint;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray()
+    {
+        return [
+            'use_dual_stack_endpoint' => $this->isUseDualstackEndpoint(),
+        ];
+    }
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/UseDualstackEndpoint/ConfigurationInterface.php

@@ -0,0 +1,19 @@
+<?php
+namespace Aws\Endpoint\UseDualstackEndpoint;
+
+interface ConfigurationInterface
+{
+    /**
+     * Returns whether or not to use a DUALSTACK endpoint
+     *
+     * @return bool
+     */
+    public function isUseDualstackEndpoint();
+
+    /**
+     * Returns the configuration as an associative array
+     *
+     * @return array
+     */
+    public function toArray();
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/UseDualstackEndpoint/ConfigurationProvider.php

@@ -0,0 +1,173 @@
+<?php
+namespace Aws\Endpoint\UseDualstackEndpoint;
+
+use Aws\AbstractConfigurationProvider;
+use Aws\CacheInterface;
+use Aws\ConfigurationProviderInterface;
+use Aws\Endpoint\UseDualstackEndpoint\Exception\ConfigurationException;
+use GuzzleHttp\Promise;
+
+/**
+ * A configuration provider is a function that returns a promise that is
+ * fulfilled with a {@see \Aws\Endpoint\UseDualstackEndpoint\onfigurationInterface}
+ * or rejected with an {@see \Aws\Endpoint\UseDualstackEndpoint\ConfigurationException}.
+ *
+ * <code>
+ * use Aws\Endpoint\UseDualstackEndpoint\ConfigurationProvider;
+ * $provider = ConfigurationProvider::defaultProvider();
+ * // Returns a ConfigurationInterface or throws.
+ * $config = $provider()->wait();
+ * </code>
+ *
+ * Configuration providers can be composed to create configuration using
+ * conditional logic that can create different configurations in different
+ * environments. You can compose multiple providers into a single provider using
+ * {@see Aws\Endpoint\UseDualstackEndpoint\ConfigurationProvider::chain}. This function
+ * accepts providers as variadic arguments and returns a new function that will
+ * invoke each provider until a successful configuration is returned.
+ *
+ * <code>
+ * // First try an INI file at this location.
+ * $a = ConfigurationProvider::ini(null, '/path/to/file.ini');
+ * // Then try an INI file at this location.
+ * $b = ConfigurationProvider::ini(null, '/path/to/other-file.ini');
+ * // Then try loading from environment variables.
+ * $c = ConfigurationProvider::env();
+ * // Combine the three providers together.
+ * $composed = ConfigurationProvider::chain($a, $b, $c);
+ * // Returns a promise that is fulfilled with a configuration or throws.
+ * $promise = $composed();
+ * // Wait on the configuration to resolve.
+ * $config = $promise->wait();
+ * </code>
+ */
+class ConfigurationProvider extends AbstractConfigurationProvider
+    implements ConfigurationProviderInterface
+{
+    const ENV_USE_DUAL_STACK_ENDPOINT = 'AWS_USE_DUALSTACK_ENDPOINT';
+    const INI_USE_DUAL_STACK_ENDPOINT = 'use_dualstack_endpoint';
+
+    public static $cacheKey = 'aws_cached_use_dualstack_endpoint_config';
+
+    protected static $interfaceClass = ConfigurationInterface::class;
+    protected static $exceptionClass = ConfigurationException::class;
+
+    /**
+     * Create a default config provider that first checks for environment
+     * variables, then checks for a specified profile in the environment-defined
+     * config file location (env variable is 'AWS_CONFIG_FILE', file location
+     * defaults to ~/.aws/config), then checks for the "default" profile in the
+     * environment-defined config file location, and failing those uses a default
+     * fallback set of configuration options.
+     *
+     * This provider is automatically wrapped in a memoize function that caches
+     * previously provided config options.
+     *
+     * @param array $config
+     *
+     * @return callable
+     */
+    public static function defaultProvider(array $config = [])
+    {
+        $region = $config['region'];
+        $configProviders = [self::env($region)];
+        if (
+            !isset($config['use_aws_shared_config_files'])
+            || $config['use_aws_shared_config_files'] != false
+        ) {
+            $configProviders[] = self::ini($region);
+        }
+        $configProviders[] = self::fallback($region);
+
+        $memo = self::memoize(
+            call_user_func_array([ConfigurationProvider::class, 'chain'], $configProviders)
+        );
+
+        if (isset($config['use_dual_stack_endpoint'])
+            && $config['use_dual_stack_endpoint'] instanceof CacheInterface
+        ) {
+            return self::cache($memo, $config['use_dual_stack_endpoint'], self::$cacheKey);
+        }
+
+        return $memo;
+    }
+
+    /**
+     * Provider that creates config from environment variables.
+     *
+     * @return callable
+     */
+    public static function env($region)
+    {
+        return function () use ($region) {
+            // Use config from environment variables, if available
+            $useDualstackEndpoint = getenv(self::ENV_USE_DUAL_STACK_ENDPOINT);
+            if (!empty($useDualstackEndpoint)) {
+                return Promise\Create::promiseFor(
+                    new Configuration($useDualstackEndpoint, $region)
+                );
+            }
+
+            return self::reject('Could not find environment variable config'
+                . ' in ' . self::ENV_USE_DUAL_STACK_ENDPOINT);
+        };
+    }
+
+    /**
+     * Config provider that creates config using a config file whose location
+     * is specified by an environment variable 'AWS_CONFIG_FILE', defaulting to
+     * ~/.aws/config if not specified
+     *
+     * @param string|null $profile  Profile to use. If not specified will use
+     *                              the "default" profile.
+     * @param string|null $filename If provided, uses a custom filename rather
+     *                              than looking in the default directory.
+     *
+     * @return callable
+     */
+    public static function ini($region, $profile = null, $filename = null)
+    {
+        $filename = $filename ?: (self::getDefaultConfigFilename());
+        $profile = $profile ?: (getenv(self::ENV_PROFILE) ?: 'default');
+
+        return function () use ($region, $profile, $filename) {
+            if (!@is_readable($filename)) {
+                return self::reject("Cannot read configuration from $filename");
+            }
+
+            // Use INI_SCANNER_NORMAL instead of INI_SCANNER_TYPED for PHP 5.5 compatibility
+            $data = \Aws\parse_ini_file($filename, true, INI_SCANNER_NORMAL);
+            if ($data === false) {
+                return self::reject("Invalid config file: $filename");
+            }
+            if (!isset($data[$profile])) {
+                return self::reject("'$profile' not found in config file");
+            }
+            if (!isset($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT])) {
+                return self::reject("Required use dualstack endpoint config values
+                    not present in INI profile '{$profile}' ({$filename})");
+            }
+
+            // INI_SCANNER_NORMAL parses false-y values as an empty string
+            if ($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT] === "") {
+                $data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT] = false;
+            }
+
+            return Promise\Create::promiseFor(
+                new Configuration($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT], $region)
+            );
+        };
+    }
+
+    /**
+     * Fallback config options when other sources are not set.
+     *
+     * @return callable
+     */
+    public static function fallback($region)
+    {
+        return function () use ($region) {
+            return Promise\Create::promiseFor(new Configuration(false, $region));
+        };
+    }
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/UseDualstackEndpoint/Exception/ConfigurationException.php

@@ -0,0 +1,14 @@
+<?php
+namespace Aws\Endpoint\UseDualstackEndpoint\Exception;
+
+use Aws\HasMonitoringEventsTrait;
+use Aws\MonitoringEventsInterface;
+
+/**
+ * Represents an error interacting with configuration for useDualstackRegion
+ */
+class ConfigurationException extends \RuntimeException implements
+    MonitoringEventsInterface
+{
+    use HasMonitoringEventsTrait;
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/UseFipsEndpoint/Configuration.php

@@ -0,0 +1,37 @@
+<?php
+namespace Aws\Endpoint\UseFipsEndpoint;
+
+use Aws;
+use Aws\Endpoint\UseFipsEndpoint\Exception\ConfigurationException;
+
+class Configuration implements ConfigurationInterface
+{
+    private $useFipsEndpoint;
+
+    public function __construct($useFipsEndpoint)
+    {
+        $this->useFipsEndpoint = Aws\boolean_value($useFipsEndpoint);
+        if (is_null($this->useFipsEndpoint)) {
+            throw new ConfigurationException("'use_fips_endpoint' config option"
+                . " must be a boolean value.");
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isUseFipsEndpoint()
+    {
+        return $this->useFipsEndpoint;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray()
+    {
+        return [
+            'use_fips_endpoint' => $this->isUseFipsEndpoint(),
+        ];
+    }
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/UseFipsEndpoint/ConfigurationInterface.php

@@ -0,0 +1,19 @@
+<?php
+namespace Aws\Endpoint\UseFipsEndpoint;
+
+interface ConfigurationInterface
+{
+    /**
+     * Returns whether or not to use a FIPS endpoint
+     *
+     * @return bool
+     */
+    public function isUseFipsEndpoint();
+
+    /**
+     * Returns the configuration as an associative array
+     *
+     * @return array
+     */
+    public function toArray();
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/UseFipsEndpoint/ConfigurationProvider.php

@@ -0,0 +1,179 @@
+<?php
+namespace Aws\Endpoint\UseFipsEndpoint;
+
+use Aws\AbstractConfigurationProvider;
+use Aws\CacheInterface;
+use Aws\ConfigurationProviderInterface;
+use Aws\Endpoint\UseFipsEndpoint\Exception\ConfigurationException;
+use GuzzleHttp\Promise;
+
+/**
+ * A configuration provider is a function that returns a promise that is
+ * fulfilled with a {@see \Aws\Endpoint\UseFipsEndpoint\onfigurationInterface}
+ * or rejected with an {@see \Aws\Endpoint\UseFipsEndpoint\ConfigurationException}.
+ *
+ * <code>
+ * use Aws\Endpoint\UseFipsEndpoint\ConfigurationProvider;
+ * $provider = ConfigurationProvider::defaultProvider();
+ * // Returns a ConfigurationInterface or throws.
+ * $config = $provider()->wait();
+ * </code>
+ *
+ * Configuration providers can be composed to create configuration using
+ * conditional logic that can create different configurations in different
+ * environments. You can compose multiple providers into a single provider using
+ * {@see Aws\Endpoint\UseFipsEndpoint\ConfigurationProvider::chain}. This function
+ * accepts providers as variadic arguments and returns a new function that will
+ * invoke each provider until a successful configuration is returned.
+ *
+ * <code>
+ * // First try an INI file at this location.
+ * $a = ConfigurationProvider::ini(null, '/path/to/file.ini');
+ * // Then try an INI file at this location.
+ * $b = ConfigurationProvider::ini(null, '/path/to/other-file.ini');
+ * // Then try loading from environment variables.
+ * $c = ConfigurationProvider::env();
+ * // Combine the three providers together.
+ * $composed = ConfigurationProvider::chain($a, $b, $c);
+ * // Returns a promise that is fulfilled with a configuration or throws.
+ * $promise = $composed();
+ * // Wait on the configuration to resolve.
+ * $config = $promise->wait();
+ * </code>
+ */
+class ConfigurationProvider extends AbstractConfigurationProvider
+    implements ConfigurationProviderInterface
+{
+    const ENV_USE_FIPS_ENDPOINT = 'AWS_USE_FIPS_ENDPOINT';
+    const INI_USE_FIPS_ENDPOINT = 'use_fips_endpoint';
+
+    public static $cacheKey = 'aws_cached_use_fips_endpoint_config';
+
+    protected static $interfaceClass = ConfigurationInterface::class;
+    protected static $exceptionClass = ConfigurationException::class;
+
+    /**
+     * Create a default config provider that first checks for environment
+     * variables, then checks for a specified profile in the environment-defined
+     * config file location (env variable is 'AWS_CONFIG_FILE', file location
+     * defaults to ~/.aws/config), then checks for the "default" profile in the
+     * environment-defined config file location, and failing those uses a default
+     * fallback set of configuration options.
+     *
+     * This provider is automatically wrapped in a memoize function that caches
+     * previously provided config options.
+     *
+     * @param array $config
+     *
+     * @return callable
+     */
+    public static function defaultProvider(array $config = [])
+    {
+        $configProviders = [self::env()];
+        if (
+            !isset($config['use_aws_shared_config_files'])
+            || $config['use_aws_shared_config_files'] != false
+        ) {
+            $configProviders[] = self::ini();
+        }
+        $configProviders[] = self::fallback($config['region']);
+
+        $memo = self::memoize(
+            call_user_func_array([ConfigurationProvider::class, 'chain'], $configProviders)
+        );
+
+        if (isset($config['use_fips_endpoint'])
+            && $config['use_fips_endpoint'] instanceof CacheInterface
+        ) {
+            return self::cache($memo, $config['use_fips_endpoint'], self::$cacheKey);
+        }
+
+        return $memo;
+    }
+
+    /**
+     * Provider that creates config from environment variables.
+     *
+     * @return callable
+     */
+    public static function env()
+    {
+        return function () {
+            // Use config from environment variables, if available
+            $useFipsEndpoint = getenv(self::ENV_USE_FIPS_ENDPOINT);
+            if (!empty($useFipsEndpoint)) {
+                return Promise\Create::promiseFor(
+                    new Configuration($useFipsEndpoint)
+                );
+            }
+
+            return self::reject('Could not find environment variable config'
+                . ' in ' . self::ENV_USE_FIPS_ENDPOINT);
+        };
+    }
+
+    /**
+     * Config provider that creates config using a config file whose location
+     * is specified by an environment variable 'AWS_CONFIG_FILE', defaulting to
+     * ~/.aws/config if not specified
+     *
+     * @param string|null $profile  Profile to use. If not specified will use
+     *                              the "default" profile.
+     * @param string|null $filename If provided, uses a custom filename rather
+     *                              than looking in the default directory.
+     *
+     * @return callable
+     */
+    public static function ini($profile = null, $filename = null)
+    {
+        $filename = $filename ?: (self::getDefaultConfigFilename());
+        $profile = $profile ?: (getenv(self::ENV_PROFILE) ?: 'default');
+
+        return function () use ($profile, $filename) {
+            if (!@is_readable($filename)) {
+                return self::reject("Cannot read configuration from $filename");
+            }
+
+            // Use INI_SCANNER_NORMAL instead of INI_SCANNER_TYPED for PHP 5.5 compatibility
+            $data = \Aws\parse_ini_file($filename, true, INI_SCANNER_NORMAL);
+            if ($data === false) {
+                return self::reject("Invalid config file: $filename");
+            }
+            if (!isset($data[$profile])) {
+                return self::reject("'$profile' not found in config file");
+            }
+            if (!isset($data[$profile][self::INI_USE_FIPS_ENDPOINT])) {
+                return self::reject("Required use fips endpoint config values
+                    not present in INI profile '{$profile}' ({$filename})");
+            }
+
+            // INI_SCANNER_NORMAL parses false-y values as an empty string
+            if ($data[$profile][self::INI_USE_FIPS_ENDPOINT] === "") {
+                $data[$profile][self::INI_USE_FIPS_ENDPOINT] = false;
+            }
+
+            return Promise\Create::promiseFor(
+                new Configuration($data[$profile][self::INI_USE_FIPS_ENDPOINT])
+            );
+        };
+    }
+
+    /**
+     * Fallback config options when other sources are not set.
+     *
+     * @return callable
+     */
+    public static function fallback($region)
+    {
+        return function () use ($region) {
+            $isFipsPseudoRegion = strpos($region, 'fips-') !== false
+                || strpos($region, '-fips') !== false;
+            if ($isFipsPseudoRegion){
+                $configuration = new Configuration(true);
+            } else {
+                $configuration = new Configuration(false);
+            }
+            return Promise\Create::promiseFor($configuration);
+        };
+    }
+}

pancake/system/vendor/aws/aws-sdk-php/src/Endpoint/UseFipsEndpoint/Exception/ConfigurationException.php

@@ -0,0 +1,14 @@
+<?php
+namespace Aws\Endpoint\UseFipsEndpoint\Exception;
+
+use Aws\HasMonitoringEventsTrait;
+use Aws\MonitoringEventsInterface;
+
+/**
+ * Represents an error interacting with configuration for useFipsRegion
+ */
+class ConfigurationException extends \RuntimeException implements
+    MonitoringEventsInterface
+{
+    use HasMonitoringEventsTrait;
+}