- (djm) Bug #591: use PKCS#15 private key label as a comment in case

   of OpenSC. Report and patch from larsch@trustcenter.de

1 files changed, 26 insertions, 0 deletions

diff --git a/scard-opensc.c b/scard-opensc.c
index 9766d46cc..e8e12dd85 100644
--- a/scard-opensc.c
+++ b/scard-opensc.c
@@ -474,4 +474,30 @@ sc_put_key(Key *prv, const char *id)
         return -1;
 }
 
+char *
+sc_get_key_label(Key *key)
+{
+        int r;
+        const struct sc_priv_data *priv;
+        struct sc_pkcs15_object *key_obj;
+
+        priv = (const struct sc_priv_data *) RSA_get_app_data(key->rsa);
+        if (priv == NULL || p15card == NULL) {
+                logit("SmartCard key not loaded");
+                /* internal error => return default label */
+                return xstrdup("smartcard key");
+        }
+        r = sc_pkcs15_find_prkey_by_id(p15card, &priv->cert_id, &key_obj);
+        if (r) {
+                logit("Unable to find private key from SmartCard: %s",
+                      sc_strerror(r));
+                return xstrdup("smartcard key");
+        }
+        if (key_obj == NULL || key_obj->label == NULL)
+                /* the optional PKCS#15 label does not exists
+                 * => return the default label */
+                return xstrdup("smartcard key");
+        return xstrdup(key_obj->label);
+}
+
 #endif /* SMARTCARD */