k5_size_keyblock
k5_size_keyblock(krb5_keyblock *keyblock, size_t *sizep);
kret = k5_size_keyblock(&ctx->subkey->keyblock, &required);
kret = k5_size_keyblock(&ctx->enc->keyblock, &required);
kret = k5_size_keyblock(&ctx->seq->keyblock, &required);
kret = k5_size_keyblock(&ctx->acceptor_subkey->keyblock,
kret = k5_size_keyblock(&auth_context->send_subkey->keyblock,
kret = k5_size_keyblock(&auth_context->recv_subkey->keyblock,
kret = k5_size_keyblock(&auth_context->key->keyblock, &required);
kret = k5_size_keyblock(authenticator->subkey, &required);
if (!k5_size_keyblock(keyblock, &required) && required <= remain) {