Commit c0b674b7 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Relax CCM tag check. 



In CCM mode don't require a tag before initialising decrypt: this allows
the tag length to be set without requiring the tag.

Reviewed-by: default avatarRich Salz <rsalz@openssl.org>
(cherry picked from commit 9cca7be1)
parent a229c2b8

crypto/evp/e_aes.c

+1 −1
Original line number Diff line number Diff line
@@ -1771,7 +1771,7 @@ static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 
    case EVP_CTRL_CCM_SET_TAG:

        if ((arg & 1) || arg < 4 || arg > 16)

            return 0;

        if ((c->encrypt && ptr) || (!c->encrypt && !ptr))

        if (c->encrypt && ptr)

            return 0;

        if (ptr) {

            cctx->tag_set = 1;