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-rw-r--r--nss_engine_vars.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/nss_engine_vars.c b/nss_engine_vars.c
index 1439a8b..b3dcf92 100644
--- a/nss_engine_vars.c
+++ b/nss_engine_vars.c
@@ -336,8 +336,13 @@ static char *nss_var_lookup_nss_cert(apr_pool_t *p, CERTCertificate *xs, char *v
resdup = TRUE;
if (strcEQ(var, "M_VERSION")) {
- result = apr_psprintf(p, "%lu", DER_GetInteger(&xs->version)+1);
- resdup = FALSE;
+ if (xs->version.data != NULL) {
+ result = apr_psprintf(p, "%lu", DER_GetInteger(&xs->version)+1);
+ resdup = FALSE;
+ } else {
+ result = apr_pstrdup(p, "UNKNOWN");
+ resdup = FALSE;
+ }
}
else if (strcEQ(var, "M_SERIAL")) {
result = apr_psprintf(p, "%lu", DER_GetInteger(&xs->serialNumber));