Add userpref helper to allow removal of the stored device public key

2 files changed, 25 insertions, 0 deletions

diff --git a/src/userpref.c b/src/userpref.c
index 10c14a0..09ec495 100644
--- a/src/userpref.c
+++ b/src/userpref.c
@@ -212,6 +212,30 @@ userpref_error_t userpref_set_device_public_key(const char *uuid, gnutls_datum_t
         return USERPREF_E_SUCCESS;
 }
 
+/** Remove the public key stored for the device with uuid from this host.
+ *
+ * @param uuid The uuid of the device
+ *
+ * @return USERPREF_E_SUCCESS on success.
+ */
+userpref_error_t userpref_remove_device_public_key(const char *uuid)
+{
+        if (!userpref_has_device_public_key(uuid))
+                return USERPREF_E_SUCCESS;
+
+        /* build file path */
+        gchar *device_file = g_strconcat(uuid, ".pem", NULL);
+        gchar *pem = g_build_path(G_DIR_SEPARATOR_S, g_get_user_config_dir(), LIBIPHONE_CONF_DIR, device_file, NULL);
+
+        /* remove file */
+        g_remove(pem);
+
+        g_free(pem);
+        g_free(device_file);
+
+        return USERPREF_E_SUCCESS;
+}
+
 /** Private function which reads the given file into a gnutls structure.
  *
  * @param file The filename of the file to read
diff --git a/src/userpref.h b/src/userpref.h
index 3540468..48b8969 100644
--- a/src/userpref.h
+++ b/src/userpref.h
@@ -38,6 +38,7 @@ G_GNUC_INTERNAL userpref_error_t userpref_get_keys_and_certs(gnutls_x509_privkey
 G_GNUC_INTERNAL userpref_error_t userpref_set_keys_and_certs(gnutls_datum_t * root_key, gnutls_datum_t * root_cert, gnutls_datum_t * host_key, gnutls_datum_t * host_cert);
 G_GNUC_INTERNAL userpref_error_t userpref_get_certs_as_pem(gnutls_datum_t *pem_root_cert, gnutls_datum_t *pem_host_cert);
 G_GNUC_INTERNAL userpref_error_t userpref_set_device_public_key(const char *uuid, gnutls_datum_t public_key);
+G_GNUC_INTERNAL userpref_error_t userpref_remove_device_public_key(const char *uuid);
 G_GNUC_INTERNAL int userpref_has_device_public_key(const char *uuid);
 G_GNUC_INTERNAL void userpref_get_host_id(char **host_id);