[#540] Add md5 S3Tests compatability

Signed-off-by: Pavel Pogodaev <p.pogodaev@yadro.com>

api/handler/encryption_test.go

@@ -48,6 +48,25 @@ func TestSimpleGetEncrypted(t *testing.T) {
 	require.Equal(t, content, string(response))
 }
 
+func TestMD5HeaderBadOrEmpty(t *testing.T) {
+	tc := prepareHandlerContext(t)
+
+	bktName, objName := "bucket-for-sse-c", "object-to-encrypt"
+	createTestBucket(tc, bktName)
+	content := "content"
+
+	headers := map[string]string{
+		api.ContentMD5: "",
+	}
+	putEncryptedObjectWithHeadersErr(t, tc, bktName, objName, content, headers, errors.ErrInvalidDigest)
+
+	headers = map[string]string{
+		api.ContentMD5: "YWJjMTIzIT8kKiYoKSctPUB+",
+	}
+
+	putEncryptedObjectWithHeadersErr(t, tc, bktName, objName, content, headers, errors.ErrBadDigest)
+}
+
 func TestGetEncryptedRange(t *testing.T) {
 	tc := prepareHandlerContext(t)
 
@@ -360,6 +379,15 @@ func putEncryptedObject(t *testing.T, tc *handlerContext, bktName, objName, cont
 	assertStatus(t, w, http.StatusOK)
 }
 
+func putEncryptedObjectWithHeadersErr(t *testing.T, tc *handlerContext, bktName, objName, content string, headers map[string]string, code errors.ErrorCode) {
+	body := bytes.NewReader([]byte(content))
+	w, r := prepareTestPayloadRequest(tc, bktName, objName, body)
+	setHeaders(r, headers)
+
+	tc.Handler().PutObjectHandler(w, r)
+	assertS3Error(t, w, errors.GetAPIError(code))
+}
+
 func getEncryptedObject(hc *handlerContext, bktName, objName string) ([]byte, http.Header) {
 	w, r := prepareTestRequest(hc, bktName, objName, nil)
 	setEncryptHeaders(r)