fix: makes checksum type and algorithm case insensitive in CreateMultipartUpload

Fixes #1339

`x-amz-checksum-type` and `x-amz-checksum-algorithm` request headers should be case insensitive in `CreateMultipartUpload`.

The changes include parsing the header values to upper case before validating and passing to back-end. `x-amz-checksum-type` response header was added in`CreateMultipartUpload`, which was missing before.

tests/integration/group-tests.go

@@ -334,7 +334,7 @@ func TestCreateMultipartUpload(s *S3Conf) {
 		CreateMultipartUpload_invalid_checksum_algorithm(s)
 		CreateMultipartUpload_empty_checksum_algorithm_with_checksum_type(s)
 		CreateMultipartUpload_invalid_checksum_type(s)
-		CreateMultipartUpload_valid_checksum_algorithm(s)
+		CreateMultipartUpload_valid_algo_type(s)
 	}
 	CreateMultipartUpload_success(s)
 }
@@ -723,7 +723,7 @@ func TestScoutfs(s *S3Conf) {
 	CreateMultipartUpload_invalid_checksum_algorithm(s)
 	CreateMultipartUpload_empty_checksum_algorithm_with_checksum_type(s)
 	CreateMultipartUpload_invalid_checksum_type(s)
-	CreateMultipartUpload_valid_checksum_algorithm(s)
+	CreateMultipartUpload_valid_algo_type(s)
 	CreateMultipartUpload_success(s)
 
 	CompletedMultipartUpload_non_existing_bucket(s)
@@ -1104,7 +1104,7 @@ func GetIntTests() IntTests {
 		"CreateMultipartUpload_invalid_checksum_algorithm":                        CreateMultipartUpload_invalid_checksum_algorithm,
 		"CreateMultipartUpload_empty_checksum_algorithm_with_checksum_type":       CreateMultipartUpload_empty_checksum_algorithm_with_checksum_type,
 		"CreateMultipartUpload_invalid_checksum_type":                             CreateMultipartUpload_invalid_checksum_type,
-		"CreateMultipartUpload_valid_checksum_algorithm":                          CreateMultipartUpload_valid_checksum_algorithm,
+		"CreateMultipartUpload_valid_algo_type":                                   CreateMultipartUpload_valid_algo_type,
 		"CreateMultipartUpload_success":                                           CreateMultipartUpload_success,
 		"UploadPart_non_existing_bucket":                                          UploadPart_non_existing_bucket,
 		"UploadPart_invalid_part_number":                                          UploadPart_invalid_part_number,

tests/integration/tests.go

@@ -8043,23 +8043,37 @@ func CreateMultipartUpload_empty_checksum_algorithm_with_checksum_type(s *S3Conf
 	})
 }
 
-func CreateMultipartUpload_valid_checksum_algorithm(s *S3Conf) error {
-	testName := "CreateMultipartUpload_valid_checksum_algorithm"
+func CreateMultipartUpload_valid_algo_type(s *S3Conf) error {
+	testName := "CreateMultipartUpload_valid_algo_type"
 	return actionHandler(s, testName, func(s3client *s3.Client, bucket string) error {
-		ctx, cancel := context.WithTimeout(context.Background(), shortTimeout)
-		res, err := s3client.CreateMultipartUpload(ctx, &s3.CreateMultipartUploadInput{
-			Bucket:            &bucket,
-			Key:               getPtr("my-obj"),
-			ChecksumAlgorithm: types.ChecksumAlgorithmCrc32c,
-		})
-		cancel()
-		if err != nil {
-			return err
-		}
+		obj := "my-obj"
+		for _, test := range []struct {
+			chType types.ChecksumType
+			chAlgo types.ChecksumAlgorithm
+		}{
+			// composite type
+			{types.ChecksumTypeComposite, types.ChecksumAlgorithmCrc32},
+			{types.ChecksumTypeComposite, types.ChecksumAlgorithmCrc32c},
+			{types.ChecksumTypeComposite, types.ChecksumAlgorithmSha1},
+			{types.ChecksumTypeComposite, types.ChecksumAlgorithmSha256},
+			// full object type
+			{types.ChecksumTypeFullObject, types.ChecksumAlgorithmCrc64nvme},
+			{types.ChecksumTypeFullObject, types.ChecksumAlgorithmCrc32},
+			{types.ChecksumTypeFullObject, types.ChecksumAlgorithmCrc32c},
+		} {
+			randChType := types.ChecksumType(randomizeCase(string(test.chType)))
+			randChAlgo := types.ChecksumAlgorithm(randomizeCase(string(test.chAlgo)))
+			out, err := createMp(s3client, bucket, obj, withChecksum(randChAlgo), withChecksumType(randChType))
+			if err != nil {
+				return err
+			}
 
-		if res.ChecksumAlgorithm != types.ChecksumAlgorithmCrc32c {
-			return fmt.Errorf("expected the checksum algorithm to be %v, instead got %v",
-				types.ChecksumAlgorithmCrc32c, res.ChecksumAlgorithm)
+			if out.ChecksumAlgorithm != test.chAlgo {
+				return fmt.Errorf("expected the checksum algorithm to be %v, instead got %v", test.chAlgo, out.ChecksumAlgorithm)
+			}
+			if out.ChecksumType != test.chType {
+				return fmt.Errorf("expected the checksum type to be %v, instead got %v", test.chType, out.ChecksumType)
+			}
 		}
 
 		return nil

tests/integration/utils.go

@@ -39,6 +39,7 @@ import (
 	"sort"
 	"strings"
 	"time"
+	"unicode"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
 	v4 "github.com/aws/aws-sdk-go-v2/aws/signer/v4"
@@ -1436,3 +1437,18 @@ type PublicBucketTestCase struct {
 	Call        func(ctx context.Context) error
 	ExpectedErr error
 }
+
+// randomizeCase randomizes the provided string latters case
+func randomizeCase(s string) string {
+	var b strings.Builder
+
+	for _, ch := range s {
+		if rnd.Intn(2) == 0 {
+			b.WriteRune(unicode.ToLower(ch))
+		} else {
+			b.WriteRune(unicode.ToUpper(ch))
+		}
+	}
+
+	return b.String()
+}