rewrite checkpoint

vendor/github.com/tmc/keyring/gnome_keyring_linux.go

@@ -0,0 +1,96 @@
+// +build gnome_keyring
+
+package keyring
+
+/*
+#cgo pkg-config: libsecret-1 glib-2.0
+#include <stdlib.h>
+#include "libsecret/secret.h"
+
+SecretSchema keyring_schema =
+  {
+    "org.github.tmc.keyring.Password",
+    SECRET_SCHEMA_NONE,
+    {
+      { "username", SECRET_SCHEMA_ATTRIBUTE_STRING },
+      { "service",  SECRET_SCHEMA_ATTRIBUTE_STRING },
+      {  NULL, 0 },
+    }
+  };
+
+// wrap the gnome calls because cgo can't deal with vararg functions
+
+gboolean gkr_set_password(gchar *description, gchar *service, gchar *username, gchar *password, GError **err) {
+	return secret_password_store_sync(
+		&keyring_schema,
+		NULL,
+		description,
+		password,
+    NULL,
+    err,
+		"service", service,
+		"username", username,
+		NULL);
+}
+
+gchar * gkr_get_password(gchar *service, gchar *username, GError **err) {
+	return secret_password_lookup_sync(
+		&keyring_schema,
+    NULL,
+		err,
+		"service", service,
+		"username", username,
+		NULL);
+}
+*/
+import "C"
+
+import (
+	"fmt"
+	"unsafe"
+)
+
+type gnomeKeyring struct{}
+
+func (p gnomeKeyring) Set(Service, Username, Password string) error {
+	desc := (*C.gchar)(C.CString("Username and password for " + Service))
+	username := (*C.gchar)(C.CString(Username))
+	service := (*C.gchar)(C.CString(Service))
+	password := (*C.gchar)(C.CString(Password))
+	defer C.free(unsafe.Pointer(desc))
+	defer C.free(unsafe.Pointer(username))
+	defer C.free(unsafe.Pointer(service))
+	defer C.free(unsafe.Pointer(password))
+
+	var gerr *C.GError
+	result := C.gkr_set_password(desc, service, username, password, &gerr)
+	defer C.free(unsafe.Pointer(gerr))
+
+	if result == 0 {
+		return fmt.Errorf("Gnome-keyring error: %+v", gerr)
+	}
+	return nil
+}
+
+func (p gnomeKeyring) Get(Service string, Username string) (string, error) {
+	var gerr *C.GError
+	var pw *C.gchar
+
+	username := (*C.gchar)(C.CString(Username))
+	service := (*C.gchar)(C.CString(Service))
+	defer C.free(unsafe.Pointer(username))
+	defer C.free(unsafe.Pointer(service))
+
+	pw = C.gkr_get_password(service, username, &gerr)
+	defer C.free(unsafe.Pointer(gerr))
+	defer C.secret_password_free((*C.gchar)(pw))
+
+	if pw == nil {
+		return "", fmt.Errorf("Gnome-keyring error: %+v", gerr)
+	}
+	return C.GoString((*C.char)(pw)), nil
+}
+
+func initializeProvider() (provider, error) {
+	return gnomeKeyring{}, nil
+}