ossl_cipher_trailingdata
&& !ossl_cipher_trailingdata(buf, bufsz, AES_BLOCK_SIZE, &in, &inl)) {
&& !ossl_cipher_trailingdata(ctx->buf, &ctx->bufsz, blksz, &in, &inl)) {
int ossl_cipher_trailingdata(unsigned char *buf, size_t *buflen,