if(s->outstate) {
// If first handshake has finished, encrypt and HMAC
- cipher_set_counter(s->outcipher, &seqno, sizeof seqno);
+ if(!cipher_set_counter(s->outcipher, &seqno, sizeof seqno))
+ return false;
+
if(!cipher_counter_xor(s->outcipher, buffer + 6, len + 1UL, buffer + 6))
return false;
// Decrypt.
memcpy(&seqno, buffer + 2, 4);
- cipher_set_counter(s->incipher, &seqno, sizeof seqno);
+ if(!cipher_set_counter(s->incipher, &seqno, sizeof seqno))
+ return false;
if(!cipher_counter_xor(s->incipher, buffer + 6, len - 4, buffer + 6))
return false;