diff --git a/api/handler/delete.go b/api/handler/delete.go
index 39769ff..8ac9fa9 100644
--- a/api/handler/delete.go
+++ b/api/handler/delete.go
@@ -246,7 +246,7 @@ func (h *handler) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err = checkOwner(bktInfo, reqInfo.User); err != nil {
-		h.logAndSendError(w, "request owner id does not match bucket owner id", reqInfo, err)
+		h.logAndSendError(ctx, w, "request owner id does not match bucket owner id", reqInfo, err)
 		return
 	}
 
diff --git a/api/handler/encryption_test.go b/api/handler/encryption_test.go
index d43721d..3561c65 100644
--- a/api/handler/encryption_test.go
+++ b/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)
diff --git a/api/handler/put.go b/api/handler/put.go
index 9e5a06a..d08389f 100644
--- a/api/handler/put.go
+++ b/api/handler/put.go
@@ -251,7 +251,7 @@ func (h *handler) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
 		Reader:            body,
 		Header:            metadata,
 		Encryption:        encryptionParams,
-		ContentMD5:        r.Header.Get(api.ContentMD5),
+		ContentMD5:        getMD5Header(r),
 		ContentSHA256Hash: r.Header.Get(api.AmzContentSha256),
 	}
 
@@ -1038,3 +1038,13 @@ func (h *handler) parseLocationConstraint(r *http.Request) (*createBucketParams,
 	}
 	return params, nil
 }
+
+func getMD5Header(r *http.Request) *string {
+	var md5Hdr *string
+	if len(r.Header.Values(api.ContentMD5)) != 0 {
+		hdr := r.Header.Get(api.ContentMD5)
+		md5Hdr = &hdr
+	}
+
+	return md5Hdr
+}
diff --git a/api/handler/put_test.go b/api/handler/put_test.go
index 235a5e5..f64123f 100644
--- a/api/handler/put_test.go
+++ b/api/handler/put_test.go
@@ -284,6 +284,12 @@ func TestPutObjectWithInvalidContentMD5(t *testing.T) {
 	w, r := prepareTestPayloadRequest(tc, bktName, objName, bytes.NewReader(content))
 	r.Header.Set(api.ContentMD5, base64.StdEncoding.EncodeToString([]byte("invalid")))
 	tc.Handler().PutObjectHandler(w, r)
+	assertS3Error(t, w, apierr.GetAPIError(apierr.ErrBadDigest))
+
+	content = []byte("content")
+	w, r = prepareTestPayloadRequest(tc, bktName, objName, bytes.NewReader(content))
+	r.Header.Set(api.ContentMD5, base64.StdEncoding.EncodeToString([]byte("")))
+	tc.Handler().PutObjectHandler(w, r)
 	assertS3Error(t, w, apierr.GetAPIError(apierr.ErrInvalidDigest))
 
 	checkNotFound(t, tc, bktName, objName, emptyVersion)
@@ -498,9 +504,6 @@ func getEmptyChunkedRequest(ctx context.Context, t *testing.T, bktName, objName
 	AWSAccessKeyID := "48c1K4PLVb7SvmV3PjDKEuXaMh8yZMXZ8Wx9msrkKcYw06dZeaxeiPe8vyFm2WsoeVaNt7UWEjNsVkagDs8oX4XXh"
 	AWSSecretAccessKey := "09260955b4eb0279dc017ba20a1ddac909cbd226c86cbb2d868e55534c8e64b0"
 
-	//awsCreds := credentials.NewStaticCredentials(AWSAccessKeyID, AWSSecretAccessKey, "")
-	//signer := v4.NewSigner(awsCreds)
-
 	reqBody := bytes.NewBufferString("0;chunk-signature=311a7142c8f3a07972c3aca65c36484b513a8fee48ab7178c7225388f2ae9894\r\n\r\n")
 
 	req, err := http.NewRequest("PUT", "http://localhost:8084/"+bktName+"/"+objName, reqBody)
diff --git a/api/layer/layer.go b/api/layer/layer.go
index 0768c83..12d064c 100644
--- a/api/layer/layer.go
+++ b/api/layer/layer.go
@@ -111,7 +111,7 @@ type (
 		Encryption        encryption.Params
 		CopiesNumbers     []uint32
 		CompleteMD5Hash   string
-		ContentMD5        string
+		ContentMD5        *string
 		ContentSHA256Hash string
 	}
 
diff --git a/api/layer/object.go b/api/layer/object.go
index 8260740..8f4d64f 100644
--- a/api/layer/object.go
+++ b/api/layer/object.go
@@ -286,8 +286,11 @@ func (n *Layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 		return nil, err
 	}
 
-	if !p.Encryption.Enabled() && len(p.ContentMD5) > 0 {
-		headerMd5Hash, err := base64.StdEncoding.DecodeString(p.ContentMD5)
+	if !p.Encryption.Enabled() && p.ContentMD5 != nil {
+		if len(*p.ContentMD5) == 0 {
+			return nil, apierr.GetAPIError(apierr.ErrInvalidDigest)
+		}
+		headerMd5Hash, err := base64.StdEncoding.DecodeString(*p.ContentMD5)
 		if err != nil {
 			return nil, apierr.GetAPIError(apierr.ErrInvalidDigest)
 		}
@@ -296,7 +299,7 @@ func (n *Layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 			if err != nil {
 				n.reqLogger(ctx).Debug(logs.FailedToDeleteObject, zap.Stringer("cid", p.BktInfo.CID), zap.Stringer("oid", createdObj.ID))
 			}
-			return nil, apierr.GetAPIError(apierr.ErrInvalidDigest)
+			return nil, apierr.GetAPIError(apierr.ErrBadDigest)
 		}
 	}