asn1: Make sure not to exceed buffer for binary OID

diff --git a/src/libstrongswan/asn1/asn1.c b/src/libstrongswan/asn1/asn1.c
index 05be574ded544d572444fd028af4449936c6af6b..00616e52696048203f10bd5ca19e5ea4e4ecc37a 100644 (file)
--- a/src/libstrongswan/asn1/asn1.c
+++ b/src/libstrongswan/asn1/asn1.c
@@ -139,7 +139,7 @@ chunk_t asn1_oid_from_string(char *str)
        while (enumerator->enumerate(enumerator, &str))
        {
                val = strtoul(str, &end, 10);
-               if (end == str || pos > buf_len-4)
+               if (end == str || pos > buf_len-5)
                {
                        pos = 0;
                        break;