gnutls_*_crt_print: better error checking

2 files changed, 10 insertions, 2 deletions

diff --git a/lib/openpgp/output.c b/lib/openpgp/output.c
index 0995b8071d..d9127c6150 100644
--- a/lib/openpgp/output.c
+++ b/lib/openpgp/output.c
@@ -564,6 +564,7 @@ gnutls_openpgp_crt_print(gnutls_openpgp_crt_t cert,
 			 gnutls_datum_t * out)
 {
 	gnutls_buffer_st str;
+	int ret;
 
 	_gnutls_buffer_init(&str);
 
@@ -572,7 +573,10 @@ gnutls_openpgp_crt_print(gnutls_openpgp_crt_t cert,
 	} else if (format == GNUTLS_CRT_PRINT_COMPACT) {
 		print_oneline(&str, cert);
 
-		_gnutls_buffer_append_data(&str, "\n", 1);
+		ret = _gnutls_buffer_append_data(&str, "\n", 1);
+		if (ret < 0)
+			return gnutls_assert_val(ret);
+
 		print_key_fingerprint(&str, cert);
 	} else {
 		_gnutls_buffer_append_str(&str,
diff --git a/lib/x509/output.c b/lib/x509/output.c
index 8f8521285b..ff0f77c586 100644
--- a/lib/x509/output.c
+++ b/lib/x509/output.c
@@ -1898,13 +1898,17 @@ gnutls_x509_crt_print(gnutls_x509_crt_t cert,
 		      gnutls_datum_t * out)
 {
 	gnutls_buffer_st str;
+	int ret;
 
 	if (format == GNUTLS_CRT_PRINT_COMPACT) {
 		_gnutls_buffer_init(&str);
 
 		print_oneline(&str, cert);
 
-		_gnutls_buffer_append_data(&str, "\n", 1);
+		ret = _gnutls_buffer_append_data(&str, "\n", 1);
+		if (ret < 0)
+			return gnutls_assert_val(ret);
+
 		print_keyid(&str, cert);
 
 		return _gnutls_buffer_to_datum(&str, out, 1);