int
aesni_cipher_setup(struct aesni_session *ses, struct cryptoini *encini)
{
struct thread *td;
int error = 0;
#if 0
int saved_ctx;
#endif
td = curthread;
#if 0
if (!is_fpu_kern_thread(0)) {
error = fpu_kern_enter(td, &ses->fpu_ctx, FPU_KERN_NORMAL);
saved_ctx = 1;
} else {
error = 0;
saved_ctx = 0;
}
#endif
if (error == 0) {
error = aesni_cipher_setup_common(ses, encini->cri_key,
encini->cri_klen);
#if 0
if (saved_ctx)
fpu_kern_leave(td, &ses->fpu_ctx);
#endif
}
return (error);
}
int
aesni_cipher_process(struct aesni_session *ses, struct cryptodesc *enccrd,
struct cryptop *crp)
{
struct thread *td;
uint8_t *buf;
int error, allocated, saved_ctx;
buf = aesni_cipher_alloc(enccrd, crp, &allocated);
if (buf == NULL)
return (ENOMEM);
td = curthread;
if (!is_fpu_kern_thread(0)) {
error = fpu_kern_enter(td, ses->fpu_ctx, FPU_KERN_NORMAL);
if (error != 0)
goto out;
saved_ctx = 1;
} else {
saved_ctx = 0;
error = 0;
}
if ((enccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0) {
error = aesni_cipher_setup_common(ses, enccrd->crd_key,
enccrd->crd_klen);
if (error != 0)
goto out;
}
if ((enccrd->crd_flags & CRD_F_ENCRYPT) != 0) {
if ((enccrd->crd_flags & CRD_F_IV_EXPLICIT) != 0)
bcopy(enccrd->crd_iv, ses->iv, AES_BLOCK_LEN);
if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0)
crypto_copyback(crp->crp_flags, crp->crp_buf,
enccrd->crd_inject, AES_BLOCK_LEN, ses->iv);
if (ses->algo == CRYPTO_AES_CBC) {
aesni_encrypt_cbc(ses->rounds, ses->enc_schedule,
enccrd->crd_len, buf, buf, ses->iv);
} else /* if (ses->algo == CRYPTO_AES_XTS) */ {
aesni_encrypt_xts(ses->rounds, ses->enc_schedule,
ses->xts_schedule, enccrd->crd_len, buf, buf,
ses->iv);
}
} else {
if ((enccrd->crd_flags & CRD_F_IV_EXPLICIT) != 0)
bcopy(enccrd->crd_iv, ses->iv, AES_BLOCK_LEN);
else
crypto_copydata(crp->crp_flags, crp->crp_buf,
enccrd->crd_inject, AES_BLOCK_LEN, ses->iv);
if (ses->algo == CRYPTO_AES_CBC) {
aesni_decrypt_cbc(ses->rounds, ses->dec_schedule,
enccrd->crd_len, buf, ses->iv);
} else /* if (ses->algo == CRYPTO_AES_XTS) */ {
aesni_decrypt_xts(ses->rounds, ses->dec_schedule,
ses->xts_schedule, enccrd->crd_len, buf, buf,
ses->iv);
}
}
if (saved_ctx)
fpu_kern_leave(td, ses->fpu_ctx);
if (allocated)
crypto_copyback(crp->crp_flags, crp->crp_buf, enccrd->crd_skip,
enccrd->crd_len, buf);
if ((enccrd->crd_flags & CRD_F_ENCRYPT) != 0)
crypto_copydata(crp->crp_flags, crp->crp_buf,
enccrd->crd_skip + enccrd->crd_len - AES_BLOCK_LEN,
AES_BLOCK_LEN, ses->iv);
out:
if (allocated) {
bzero(buf, enccrd->crd_len);
free(buf, M_AESNI);
}
return (error);
}