initial

1 files changed, 149 insertions, 0 deletions

diff --git a/vendor/aws/aws-sdk-php/src/S3/ValidateResponseChecksumParser.php b/vendor/aws/aws-sdk-php/src/S3/ValidateResponseChecksumParser.php
new file mode 100644
index 0000000..d63c407
--- /dev/null
+++ b/vendor/aws/aws-sdk-php/src/S3/ValidateResponseChecksumParser.php
@@ -0,0 +1,149 @@
+<?php
+namespace Aws\S3;
+
+use Aws\Api\Parser\AbstractParser;
+use Aws\Api\Service;
+use Aws\Api\StructureShape;
+use Aws\CommandInterface;
+use Aws\S3\Exception\S3Exception;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * @internal Decorates a parser for the S3 service to validate the response checksum.
+ */
+class ValidateResponseChecksumParser extends AbstractParser
+{
+    use CalculatesChecksumTrait;
+    /**
+     * @param callable $parser Parser to wrap.
+     */
+    public function __construct(callable $parser, Service $api)
+    {
+        $this->api = $api;
+        $this->parser = $parser;
+    }
+
+    public function __invoke(
+        CommandInterface $command,
+        ResponseInterface $response
+    ) {
+        $fn = $this->parser;
+        $result = $fn($command, $response);
+
+        //Skip this middleware if the operation doesn't have an httpChecksum
+        $op = $this->api->getOperation($command->getName());
+        $checksumInfo = isset($op['httpChecksum'])
+            ? $op['httpChecksum']
+            : [];
+        if (empty($checksumInfo)) {
+            return $result;
+        }
+
+        //Skip this middleware if the operation doesn't send back a checksum, or the user doesn't opt in
+        $checksumModeEnabledMember = isset($checksumInfo['requestValidationModeMember'])
+            ? $checksumInfo['requestValidationModeMember']
+            : "";
+        $checksumModeEnabled = isset($command[$checksumModeEnabledMember])
+            ? $command[$checksumModeEnabledMember]
+            : "";
+        $responseAlgorithms = isset($checksumInfo['responseAlgorithms'])
+            ? $checksumInfo['responseAlgorithms']
+            : [];
+        if (empty($responseAlgorithms)
+            || strtolower($checksumModeEnabled) !== "enabled"
+        ) {
+            return $result;
+        }
+
+        if (extension_loaded('awscrt')) {
+            $checksumPriority = ['CRC32C', 'CRC32', 'SHA1', 'SHA256'];
+        } else {
+            $checksumPriority = ['CRC32', 'SHA1', 'SHA256'];
+        }
+        $checksumsToCheck = array_intersect($responseAlgorithms, $checksumPriority);
+        $checksumValidationInfo = $this->validateChecksum($checksumsToCheck, $response);
+
+        if ($checksumValidationInfo['status'] == "SUCCEEDED") {
+            $result['ChecksumValidated'] = $checksumValidationInfo['checksum'];
+        } else if ($checksumValidationInfo['status'] == "FAILED"){
+            //Ignore failed validations on GetObject if it's a multipart get which returned a full multipart object
+            if ($command->getName() == "GetObject"
+                && !empty($checksumValidationInfo['checksumHeaderValue'])
+            ) {
+                $headerValue = $checksumValidationInfo['checksumHeaderValue'];
+                $lastDashPos = strrpos($headerValue, '-');
+                $endOfChecksum = substr($headerValue, $lastDashPos + 1);
+                if (is_numeric($endOfChecksum)
+                    && intval($endOfChecksum) > 1
+                    && intval($endOfChecksum) < 10000) {
+                    return $result;
+                }
+            }
+            throw new S3Exception(
+                "Calculated response checksum did not match the expected value",
+                $command
+            );
+        }
+        return $result;
+    }
+
+    public function parseMemberFromStream(
+        StreamInterface $stream,
+        StructureShape $member,
+        $response
+    ) {
+        return $this->parser->parseMemberFromStream($stream, $member, $response);
+    }
+
+    /**
+     * @param $checksumPriority
+     * @param ResponseInterface $response
+     */
+    public function validateChecksum($checksumPriority, ResponseInterface $response)
+    {
+        $checksumToValidate = $this->chooseChecksumHeaderToValidate(
+            $checksumPriority,
+            $response
+        );
+        $validationStatus = "SKIPPED";
+        $checksumHeaderValue = null;
+        if (!empty($checksumToValidate)) {
+            $checksumHeaderValue = $response->getHeader(
+                'x-amz-checksum-' . $checksumToValidate
+            );
+            if (isset($checksumHeaderValue)) {
+                $checksumHeaderValue = $checksumHeaderValue[0];
+                $calculatedChecksumValue = $this->getEncodedValue(
+                    $checksumToValidate,
+                    $response->getBody()
+                );
+                $validationStatus = $checksumHeaderValue == $calculatedChecksumValue
+                    ? "SUCCEEDED"
+                    : "FAILED";
+            }
+        }
+        return [
+            "status" => $validationStatus,
+            "checksum" => $checksumToValidate,
+            "checksumHeaderValue" => $checksumHeaderValue,
+        ];
+    }
+
+    /**
+     * @param $checksumPriority
+     * @param ResponseInterface $response
+     */
+    public function chooseChecksumHeaderToValidate(
+        $checksumPriority,
+        ResponseInterface $response
+    ) {
+        foreach ($checksumPriority as $checksum) {
+            $checksumHeader = 'x-amz-checksum-' . $checksum;
+            if ($response->hasHeader($checksumHeader)) {
+                return $checksum;
+            }
+        }
+        return null;
+    }
+}