krb5 commit: Make the PKINIT NSS path also check for NULL certs

[Greg Hudson]

https://github.com/krb5/krb5/commit/8899397ab78ea09b8d7dbb20347dd12c93eb15ee
commit 8899397ab78ea09b8d7dbb20347dd12c93eb15ee
Author: Nalin Dahyabhai <nalin at dahyabhai.net>
Date:   Tue Jul 9 14:13:16 2013 -0400

    Make the PKINIT NSS path also check for NULL certs
    
    When called to free identity information, do what the OpenSSL-based
    version does, and error out if the identity information is NULL.

 src/plugins/preauth/pkinit/pkinit_crypto_nss.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/src/plugins/preauth/pkinit/pkinit_crypto_nss.c b/src/plugins/preauth/pkinit/pkinit_crypto_nss.c
index 1b2172c..56a2170 100644
--- a/src/plugins/preauth/pkinit/pkinit_crypto_nss.c
+++ b/src/plugins/preauth/pkinit/pkinit_crypto_nss.c
@@ -2985,7 +2985,12 @@ crypto_free_cert_info(krb5_context context,
                       pkinit_req_crypto_context req_cryptoctx,
                       pkinit_identity_crypto_context id_cryptoctx)
 {
-    return 0;   /* Maybe should we nuke the id_certs list here? */
+    /* Mimic the OpenSSL-based implementation's check first. */
+    if (id_cryptoctx == NULL)
+        return EINVAL;
+
+    /* Maybe should we nuke the id_certs list here? */
+    return 0;
 }
 
 /* Count how many candidate "self" certificates and keys we have.  We could as