fix: Adds PartNumber validation for CompleteMultipartUploads parts. Adds a check to validate the parts order to be ascending.

s3err/s3err.go

@@ -78,6 +78,8 @@ const (
 	ErrInvalidPart
 	ErrEmptyParts
 	ErrInvalidPartNumber
+	ErrInvalidPartOrder
+	ErrInvalidCompleteMpPartNumber
 	ErrInternalError
 	ErrInvalidCopyDest
 	ErrInvalidCopySource
@@ -272,6 +274,16 @@ var errorCodeResponse = map[ErrorCode]APIError{
 		Description:    "Part number must be an integer between 1 and 10000, inclusive.",
 		HTTPStatusCode: http.StatusBadRequest,
 	},
+	ErrInvalidPartOrder: {
+		Code:           "InvalidPartOrder",
+		Description:    "The list of parts was not in ascending order. Parts must be ordered by part number.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidCompleteMpPartNumber: {
+		Code:           "InvalidArgument",
+		Description:    "PartNumber must be >= 1",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 	ErrInvalidCopyDest: {
 		Code:           "InvalidRequest",
 		Description:    "This copy request is illegal because it is trying to copy an object to itself without changing the object's metadata, storage class, website redirect location or encryption attributes.",