Test of bad signature, improved readme

README.md

@@ -7,7 +7,7 @@ Word **sigil** in name stands for latin word *sigillum*, which means **seal** or
 
 ### Build
 
-Performs build with output into "build" directory. After those steps, there will be a **static and shared library** and also **selftest executable**.
+Performs build and puts the output into *build* directory. After these steps, there will be a **libpdfsigil** shared library with **selftest** executable and also **pdf-sigil** proof-of-concept executable. Also Doxygen documentation will be generated into *dir* directory.
 
 ```shell
 mkdir build

lib/sigil.c

@@ -679,8 +679,8 @@ int sigil_sigil_self_test(int verbosity)
 
     print_test_result(1, verbosity);
 
-    // TEST: fn sigil_verify with subfilter x509.rsa_sha1
-    print_test_item("VERIFY x509.rsa_sha1", verbosity);
+    // TEST: fn sigil_verify with subfilter x509.rsa_sha1 (correct)
+    print_test_item("VERIFY PKCS#1 (correct)", verbosity);
 
     {
         int result;
@@ -704,6 +704,39 @@ int sigil_sigil_self_test(int verbosity)
 
     print_test_result(1, verbosity);
 
+    // TEST: fn sigil_verify with subfilter x509.rsa_sha1 (incorrect)
+    print_test_item("VERIFY PKCS#1 (incorrect)", verbosity);
+
+    {
+        int result;
+
+        sgl = test_prepare_sgl_path("test/modified_pkcs1.pdf");
+        if (sgl == NULL)
+            goto failed;
+
+        if (sigil_set_trusted_system(sgl) != ERR_NONE)
+            goto failed;
+
+        if (sigil_verify(sgl) != ERR_NONE)
+            goto failed;
+
+        err = sigil_get_result(sgl, &result);
+        if (err != ERR_NONE || result != VERIFY_FAILED)
+            goto failed;
+
+        err = sigil_get_cert_validation_result(sgl, &result);
+        if (err != ERR_NONE || result != CERT_STATUS_VERIFIED)
+            goto failed;
+
+        err = sigil_get_data_integrity_result(sgl, &result);
+        if (err != ERR_NONE || result != HASH_CMP_RESULT_DIFFER)
+            goto failed;
+
+        sigil_free(&sgl);
+    }
+
+    print_test_result(1, verbosity);
+
     // all tests done
     print_module_result(1, verbosity);