first commit -> move some files from one-api

vendor/aws_sdk/Aws/S3/CalculatesChecksumTrait.php

@@ -0,0 +1,50 @@
+<?php
+namespace Aws\S3;
+
+use AWS\CRT\CRT;
+use Aws\Exception\CommonRuntimeException;
+use GuzzleHttp\Psr7;
+use InvalidArgumentException;
+
+trait CalculatesChecksumTrait
+{
+    /**
+     * @param string $requestedAlgorithm  the algorithm to encode with
+     * @param string $value               the value to be encoded
+     * @return string
+     */
+    public static function getEncodedValue($requestedAlgorithm, $value) {
+        $requestedAlgorithm = strtolower($requestedAlgorithm);
+        $useCrt = extension_loaded('awscrt');
+        if ($useCrt) {
+            $crt = new Crt();
+            switch ($requestedAlgorithm) {
+                case 'crc32c':
+                    return base64_encode(pack('N*',($crt->crc32c($value))));
+                case 'crc32':
+                    return base64_encode(pack('N*',($crt->crc32($value))));
+                case 'sha256':
+                case 'sha1':
+                    return base64_encode(Psr7\Utils::hash($value, $requestedAlgorithm, true));
+                default:
+                    break;
+                throw new InvalidArgumentException(
+                    "Invalid checksum requested: {$requestedAlgorithm}."
+                    . "  Valid algorithms are CRC32C, CRC32, SHA256, and SHA1."
+                );
+            }
+        }  else {
+            if ($requestedAlgorithm == 'crc32c') {
+                throw new CommonRuntimeException("crc32c is not supported for checksums "
+                    . "without use of the common runtime for php.  Please enable the CRT or choose "
+                    . "a different algorithm."
+                );
+            }
+            if ($requestedAlgorithm == "crc32") {
+                $requestedAlgorithm = "crc32b";
+            }
+            return base64_encode(Psr7\Utils::hash($value, $requestedAlgorithm, true));
+        }
+    }
+
+}