Added tests for mbedtls_rsa_rsassa_pss_sign_ext()

- added some invalid param tests in test_suite_rsa
- added functional tests in test_suite_pkcs1_v21

Signed-off-by: Cédric Meuter <cedric.meuter@gmail.com>
diff --git a/tests/suites/test_suite_rsa.function b/tests/suites/test_suite_rsa.function
index 6c73e39..bbe2360 100644
--- a/tests/suites/test_suite_rsa.function
+++ b/tests/suites/test_suite_rsa.function
@@ -25,6 +25,7 @@
     const int invalid_padding = 42;
     const int valid_mode = MBEDTLS_RSA_PRIVATE;
     const int invalid_mode = 42;
+    const int negative_salt_length = -2;
     unsigned char buf[42] = { 0 };
     size_t olen;
 
@@ -338,6 +339,33 @@
                                                          buf ) );
 
     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
+                            mbedtls_rsa_rsassa_pss_sign_ext( &ctx, NULL, NULL,
+                                                             0, sizeof( buf ), buf,
+                                                             negative_salt_length,
+                                                             buf ) );
+    TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
+                            mbedtls_rsa_rsassa_pss_sign_ext( NULL, NULL, NULL,
+                                                             0, sizeof( buf ), buf,
+                                                             MBEDTLS_RSA_SALT_LEN_ANY,
+                                                             buf ) );
+    TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
+                            mbedtls_rsa_rsassa_pss_sign_ext( &ctx, NULL, NULL,
+                                                             0, sizeof( buf ), NULL,
+                                                             MBEDTLS_RSA_SALT_LEN_ANY,
+                                                             buf ) );
+    TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
+                            mbedtls_rsa_rsassa_pss_sign_ext( &ctx, NULL, NULL,
+                                                             0, sizeof( buf ), buf,
+                                                             MBEDTLS_RSA_SALT_LEN_ANY,
+                                                             NULL ) );
+    TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
+                            mbedtls_rsa_rsassa_pss_sign_ext( &ctx, NULL, NULL,
+                                                             MBEDTLS_MD_SHA1,
+                                                             0, NULL,
+                                                             MBEDTLS_RSA_SALT_LEN_ANY,
+                                                             buf ) );
+
+    TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
                             mbedtls_rsa_pkcs1_verify( NULL, NULL, NULL,
                                                       valid_mode,
                                                       0, sizeof( buf ), buf,