diff --git a/openssl-act-engine/src/test_engine.cpp b/openssl-act-engine/src/test_engine.cpp
index 13450cb..e7b86a3 100644
--- a/openssl-act-engine/src/test_engine.cpp
+++ b/openssl-act-engine/src/test_engine.cpp
@@ -62,9 +62,10 @@ int main(int argc, char* argv[])
 		}		
 	}
 
+        /*
 	EVP_PKEY* pk_pub = ENGINE_load_public_key(e, selected_cert->id, NULL, NULL);
 	RSA* pubkey = EVP_PKEY_get1_RSA(pk_pub);
-	
+
 	const char* source = "Dies ist ein geheimer Testtext zum Verschlüsseln\n";
 	int srclen = strlen(source)+1;
 	
@@ -82,13 +83,33 @@ int main(int argc, char* argv[])
 	
 	EVP_PKEY_free(pk_priv);
 	RSA_free(privkey);
-	
+
 	if(srclen != plainlen || strcmp(source, plainbuf))
 		printf("Unterschied in Ver/Entschlüsselung");
 	else
 		printf("%s",plainbuf);
-		
+	   	
+
+    */
+
+        const char *source = "Dies ist ein Testtext zum Signieren.\n";
+        int srclen = strlen(source)+1;
+
+        char signature[1000];
+        unsigned int siglen = 0;
+
+	EVP_PKEY* pk_priv = ENGINE_load_private_key(e, selected_cert->id, NULL, NULL);
+	RSA* privkey = EVP_PKEY_get1_RSA(pk_priv);
 	
+        
+        CHECK(RSA_sign(NID_md5_sha1, (const unsigned char*)source, srclen, (unsigned char*)signature, &siglen, privkey));
+        printf("Signature-Len: %d\n", siglen);
+
+	EVP_PKEY* pk_pub = ENGINE_load_public_key(e, selected_cert->id, NULL, NULL);
+	RSA* pubkey = EVP_PKEY_get1_RSA(pk_pub);
+
+        CHECK(RSA_verify(NID_md5_sha1,(const unsigned char*) source, srclen, (unsigned char*)signature, siglen, pubkey));
+
 
 
 	CHECK(ENGINE_finish(e));