Changes between 0.9.8k and 0.9.8l [xx XXX xxxx]
+ *) Don't check self signed certificate signatures in X509_verify_cert():
+ it just wastes time without adding any security. As a useful side effect
+ self signed root CAs with non-FIPS digests are now usable in FIPS mode.
+ [Steve Henson]
+
*) In dtls1_process_out_of_seq_message() the check if the current message
is already buffered was missing. For every new message was memory
allocated, allowing an attacker to perform an denial of service attack
while (n >= 0)
{
ctx->error_depth=n;
- if (!xs->valid)
+
+ /* Skip signature check for self signed certificates. It
+ * doesn't add any security and just wastes time.
+ */
+ if (!xs->valid && xs != xi)
{
if ((pkey=X509_get_pubkey(xi)) == NULL)
{
if (!ok) goto end;
}
else if (X509_verify(xs,pkey) <= 0)
- /* XXX For the final trusted self-signed cert,
- * this is a waste of time. That check should
- * optional so that e.g. 'openssl x509' can be
- * used to detect invalid self-signatures, but
- * we don't verify again and again in SSL
- * handshakes and the like once the cert has
- * been declared trusted. */
{
ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
ctx->current_cert=xs;