Implement master password encrypted string tags

1 files changed, 21 insertions, 10 deletions

diff --git a/libsylph/masterpassword.c b/libsylph/masterpassword.c
index d240a7a..23e8f2f 100644
--- a/libsylph/masterpassword.c
+++ b/libsylph/masterpassword.c
@@ -48,6 +48,15 @@ void unload_master_password(void) {
 
 }
 
+gint mpes_string_prefix(const gchar *str) {
+
+        /* this function will be expanded in time as the format changes */
+        if (g_str_has_prefix(str, "mpes1:"))
+                return 6;
+        return 0;
+
+}
+
 gboolean master_password_active(void) {
 
 #if USE_SSL
@@ -59,38 +68,40 @@ gboolean master_password_active(void) {
 
 }
 
-gchar *decrypt_with_master_password(gchar *str) {
+gchar *decrypt_with_master_password(const gchar *str) {
 
 #if USE_SSL
         gchar *new_str;
+        gint str_prefix;
 
         if ((!str) || (!master_password_active()))
-                return str; /* do nothing */
+                return g_strdup(str);
 
+        str_prefix = mpes_string_prefix(str);
         if (decrypt_data(&new_str,
-                                         str,
+                                         str + str_prefix,
                                          master_password,
-                                         strlen(str)) != RC_OK) {
+                                         strlen(str) - str_prefix) != RC_OK) {
                 OPENSSL_cleanse(new_str, strlen(new_str));
                 g_free(new_str);
-                return str;
+                return g_strdup(str);
         }
 
         return new_str;
 #else
-        return str; /* do nothing */
+        return g_strdup(str);
 #endif
 
 }
 
-gchar *encrypt_with_master_password(gchar *str) {
+gchar *encrypt_with_master_password(const gchar *str) {
 
 #if USE_SSL
         gchar *new_str;
         gint length_encrypted;
 
         if ((!str) || (!master_password_active()))
-                return str; /* do nothing */
+                return g_strdup(str);
 
         if (encrypt_data(&new_str,
                                          &length_encrypted,
@@ -101,12 +112,12 @@ gchar *encrypt_with_master_password(gchar *str) {
                                          TRUE) != RC_OK) {
                 OPENSSL_cleanse(new_str, strlen(new_str));
                 g_free(new_str);
-                return str;
+                return g_strdup(str);
         }
 
         return new_str;
 #else
-        return str; /* do nothing */
+        return g_strdup(str);
 #endif
 
 }