ENCRYPT_IOV
if (ENCRYPT_IOV(iov))
if (cursor->signing ? SIGN_IOV(iov) : ENCRYPT_IOV(iov))
#define SIGN_IOV(_iov) (ENCRYPT_IOV(_iov) || \
if (signing ? SIGN_IOV(&data[i]) : ENCRYPT_IOV(&data[i]))
if (ENCRYPT_IOV(iov)) {