1 files changed, 38 insertions, 0 deletions

diff --git a/libbb/obscure.c b/libbb/obscure.c
index 24c4ac917..ad17d1ff1 100644
--- a/libbb/obscure.c
+++ b/libbb/obscure.c
@@ -182,3 +182,41 @@ int FAST_FUNC obscure(const char *old, const char *newval, const struct passwd *
         }
         return 0;
 }
+
+#if ENABLE_UNIT_TEST
+
+/* Test obscure_msg() instead of obscure() in order not to print anything. */
+
+static const struct passwd pw = {
+        .pw_name = (char *)"johndoe",
+        .pw_gecos = (char *)"John Doe",
+};
+
+BBUNIT_DEFINE_TEST(obscure_weak_pass)
+{
+        /* Empty password */
+        BBUNIT_ASSERT_NOTNULL(obscure_msg("Ad4#21?'S|", "", &pw));
+        /* Pure numbers */
+        BBUNIT_ASSERT_NOTNULL(obscure_msg("Ad4#21?'S|", "23577315", &pw));
+        /* Similar to pw_name */
+        BBUNIT_ASSERT_NOTNULL(obscure_msg("Ad4#21?'S|", "johndoe123%", &pw));
+        /* Similar to pw_gecos, reversed */
+        BBUNIT_ASSERT_NOTNULL(obscure_msg("Ad4#21?'S|", "eoD nhoJ^44@", &pw));
+        /* Similar to the old password */
+        BBUNIT_ASSERT_NOTNULL(obscure_msg("Ad4#21?'S|", "d4#21?'S", &pw));
+        /* adjacent letters */
+        BBUNIT_ASSERT_NOTNULL(obscure_msg("Ad4#21?'S|", "qwerty123", &pw));
+        /* Many similar chars */
+        BBUNIT_ASSERT_NOTNULL(obscure_msg("Ad4#21?'S|", "^33Daaaaaa1", &pw));
+
+        BBUNIT_ENDTEST;
+}
+
+BBUNIT_DEFINE_TEST(obscure_strong_pass)
+{
+        BBUNIT_ASSERT_NULL(obscure_msg("Rt4##2&:'|", "}(^#rrSX3S*22", &pw));
+
+        BBUNIT_ENDTEST;
+}
+
+#endif /* ENABLE_UNIT_TEST */