tests: added unit tests of gnutls_x509_crt_export

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/crt_apis.c b/tests/crt_apis.c
index 9fc1a53be6..cf0c7fd800 100644
--- a/tests/crt_apis.c
+++ b/tests/crt_apis.c
@@ -78,6 +78,7 @@ void doit(void)
 	gnutls_x509_crt_t crt2;
 	const char *err = NULL;
 	unsigned char buf[64];
+	unsigned char large_buf[5*1024];
 	unsigned int status;
 	gnutls_datum_t out;
 	size_t s = 0;
@@ -331,6 +332,29 @@ void doit(void)
 	assert(memcmp(out.data, saved_crt.data, out.size)==0);
 #endif
 
+	/* test behavior of gnutls_x509_crt_export on varios corner cases */
+	s = 0;
+	assert(gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, NULL, &s) == GNUTLS_E_SHORT_MEMORY_BUFFER);
+	assert(s == out.size+1);
+	s = sizeof(buf);
+	assert(gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buf, &s) == GNUTLS_E_SHORT_MEMORY_BUFFER);
+	assert(s == out.size+1);
+
+	/* check whether the PEM output matches gnutls_x509_crt_export2 */
+	s = sizeof(large_buf);
+	assert(gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, large_buf, &s) == 0);
+	assert(s == out.size);
+	assert(memcmp(large_buf, out.data, out.size) == 0);
+	gnutls_free(out.data);
+
+	/* check whether the der out length differs */
+	s = sizeof(large_buf);
+	assert(gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_DER, large_buf, &s) == 0);
+	assert(gnutls_x509_crt_export2(crt, GNUTLS_X509_FMT_DER, &out) >= 0);
+
+	assert(s == out.size);
+	assert(memcmp(large_buf, out.data, out.size) == 0);
+
 	gnutls_free(out.data);
 
 	gnutls_x509_crt_deinit(crt);