Reject empty generation strings.

Reported by Hanno Böck <hanno@hboeck.de>

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 111b60bea01d234b5873488c19ff2b9c5d4d58e9)

Conflicts:
	crypto/asn1/asn1_gen.c

diff --git a/crypto/asn1/asn1_gen.c b/crypto/asn1/asn1_gen.c
index 132a9ef468f69bbd473e31f71aa69901303863f2..e303d11993906d73b6c365195f7e711aafc3f30a 100644 (file)
--- a/crypto/asn1/asn1_gen.c
+++ b/crypto/asn1/asn1_gen.c
@@ -152,8 +152,10 @@ ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
     asn1_tags.imp_class = -1;
     asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
     asn1_tags.exp_count = 0;
-    if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
+    if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) {
+        *perr = ASN1_R_UNKNOWN_TAG;
         return NULL;
+    }
 
     if ((asn1_tags.utype == V_ASN1_SEQUENCE)
         || (asn1_tags.utype == V_ASN1_SET)) {
@@ -279,6 +281,9 @@ static int asn1_cb(const char *elem, int len, void *bitstr)
 
     int tmp_tag, tmp_class;
 
+    if (elem == NULL)
+        return -1;
+
     for (i = 0, p = elem; i < len; p++, i++) {
         /* Look for the ':' in name value pairs */
         if (*p == ':') {