shamir_threshold is an integer.

Signed-off-by: Felix Fontein <felix@fontein.de>

stores/dotenv/store.go

@@ -49,7 +49,10 @@ func (store *Store) LoadEncryptedFile(in []byte) (sops.Tree, error) {
 	}
 
 	stores.DecodeNewLines(mdMap)
-	stores.DecodeNonStrings(mdMap)
+	err = stores.DecodeNonStrings(mdMap)
+	if err != nil {
+		return sops.Tree{}, err
+	}
 	metadata, err := stores.UnflattenMetadata(mdMap)
 	if err != nil {
 		return sops.Tree{}, err

stores/flatten.go

@@ -236,13 +236,28 @@ func EncodeNewLines(m map[string]interface{}) {
 }
 
 // DecodeNonStrings will look for known metadata keys that are not strings and decode to the appropriate type
-func DecodeNonStrings(m map[string]interface{}) {
+func DecodeNonStrings(m map[string]interface{}) error {
 	if v, ok := m["mac_only_encrypted"]; ok {
 		m["mac_only_encrypted"] = false
 		if v == "true" {
 			m["mac_only_encrypted"] = true
 		}
 	}
+	if v, ok := m["shamir_threshold"]; ok {
+		switch val := v.(type) {
+			case string:
+				vInt, err := strconv.Atoi(val)
+				if err != nil {
+					return fmt.Errorf("shamir_threshold is not an integer: %s", err.Error())
+				}
+				m["shamir_threshold"] = vInt
+			case int:
+				m["shamir_threshold"] = val
+			default:
+				return fmt.Errorf("shamir_threshold is neither a string nor an integer, but %T", val)
+		}
+	}
+	return nil
 }
 
 // EncodeNonStrings will look for known metadata keys that are not strings and will encode it to strings
@@ -255,4 +270,9 @@ func EncodeNonStrings(m map[string]interface{}) {
 			}
 		}
 	}
+	if v, found := m["shamir_threshold"]; found {
+		if vInt, ok := v.(int); ok {
+			m["shamir_threshold"] = fmt.Sprintf("%d", vInt)
+		}
+	}
 }

stores/flatten_test.go

@@ -222,14 +222,35 @@ func TestDecodeNonStrings(t *testing.T) {
 		{map[string]interface{}{"mac_only_encrypted": "false"}, map[string]interface{}{"mac_only_encrypted": false}},
 		{map[string]interface{}{"mac_only_encrypted": "true"}, map[string]interface{}{"mac_only_encrypted": true}},
 		{map[string]interface{}{"mac_only_encrypted": "something-else"}, map[string]interface{}{"mac_only_encrypted": false}},
+		{map[string]interface{}{"shamir_threshold": "2"}, map[string]interface{}{"shamir_threshold": 2}},
+		{map[string]interface{}{"shamir_threshold": "002"}, map[string]interface{}{"shamir_threshold": 2}},
+		{map[string]interface{}{"shamir_threshold": "123"}, map[string]interface{}{"shamir_threshold": 123}},
+		{map[string]interface{}{"shamir_threshold": 123}, map[string]interface{}{"shamir_threshold": 123}},
 	}
 
 	for _, tt := range tests {
-		DecodeNonStrings(tt.input)
+		err := DecodeNonStrings(tt.input)
+		assert.Nil(t, err)
 		assert.Equal(t, tt.want, tt.input)
 	}
 }
 
+func TestDecodeNonStringsErrors(t *testing.T) {
+	tests := []struct {
+		input map[string]interface{}
+		want  string
+	}{
+		{map[string]interface{}{"shamir_threshold": "foo"}, "shamir_threshold is not an integer: strconv.Atoi: parsing \"foo\": invalid syntax"},
+		{map[string]interface{}{"shamir_threshold": true}, "shamir_threshold is neither a string nor an integer, but bool"},
+	}
+
+	for _, tt := range tests {
+		err := DecodeNonStrings(tt.input)
+		assert.NotNil(t, err)
+		assert.Equal(t, tt.want, err.Error())
+	}
+}
+
 func TestEncodeNonStrings(t *testing.T) {
 	tests := []struct {
 		input map[string]interface{}
@@ -237,6 +258,8 @@ func TestEncodeNonStrings(t *testing.T) {
 	}{
 		{map[string]interface{}{"mac_only_encrypted": false}, map[string]interface{}{"mac_only_encrypted": "false"}},
 		{map[string]interface{}{"mac_only_encrypted": true}, map[string]interface{}{"mac_only_encrypted": "true"}},
+		{map[string]interface{}{"shamir_threshold": 2}, map[string]interface{}{"shamir_threshold": "2"}},
+		{map[string]interface{}{"shamir_threshold": 123}, map[string]interface{}{"shamir_threshold": "123"}},
 	}
 
 	for _, tt := range tests {

stores/ini/store.go

@@ -188,7 +188,10 @@ func (store *Store) iniSectionToMetadata(sopsSection *ini.Section) (stores.Metad
 		metadataHash[k] = v
 	}
 	stores.DecodeNewLines(metadataHash)
-	stores.DecodeNonStrings(metadataHash)
+	err := stores.DecodeNonStrings(metadataHash)
+	if err != nil {
+		return stores.Metadata{}, err
+	}
 	return stores.UnflattenMetadata(metadataHash)
 }