static int pcrypt_aead_givencrypt(struct aead_givcrypt_request *req)
{
int err;
struct aead_request *areq = &req->areq;
struct pcrypt_request *preq = aead_request_ctx(areq);
struct aead_givcrypt_request *creq = pcrypt_request_ctx(preq);
struct padata_priv *padata = pcrypt_request_padata(preq);
struct crypto_aead *aead = aead_givcrypt_reqtfm(req);
struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
u32 flags = aead_request_flags(areq);
memset(padata, 0, sizeof(struct padata_priv));
padata->parallel = pcrypt_aead_givenc;
padata->serial = pcrypt_aead_giv_serial;
aead_givcrypt_set_tfm(creq, ctx->child);
aead_givcrypt_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
pcrypt_aead_done, areq);
aead_givcrypt_set_crypt(creq, areq->src, areq->dst,
areq->cryptlen, areq->iv);
aead_givcrypt_set_assoc(creq, areq->assoc, areq->assoclen);
aead_givcrypt_set_giv(creq, req->giv, req->seq);
err = pcrypt_do_parallel(padata, &ctx->cb_cpu, &pencrypt);
if (!err)
return -EINPROGRESS;
return err;
}
static void seqiv_aead_complete2(struct aead_givcrypt_request *req, int err)
{
struct aead_request *subreq = aead_givcrypt_reqctx(req);
struct crypto_aead *geniv;
if (err == -EINPROGRESS)
return;
if (err)
goto out;
geniv = aead_givcrypt_reqtfm(req);
memcpy(req->areq.iv, subreq->iv, crypto_aead_ivsize(geniv));
out:
kfree(subreq->iv);
}
static int seqiv_aead_givencrypt(struct aead_givcrypt_request *req)
{
struct crypto_aead *geniv = aead_givcrypt_reqtfm(req);
struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
struct aead_request *areq = &req->areq;
struct aead_request *subreq = aead_givcrypt_reqctx(req);
crypto_completion_t compl;
void *data;
u8 *info;
unsigned int ivsize;
int err;
aead_request_set_tfm(subreq, aead_geniv_base(geniv));
compl = areq->base.complete;
data = areq->base.data;
info = areq->iv;
ivsize = crypto_aead_ivsize(geniv);
if (unlikely(!IS_ALIGNED((unsigned long)info,
crypto_aead_alignmask(geniv) + 1))) {
info = kmalloc(ivsize, areq->base.flags &
CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL:
GFP_ATOMIC);
if (!info)
return -ENOMEM;
compl = seqiv_aead_complete;
data = req;
}
aead_request_set_callback(subreq, areq->base.flags, compl, data);
aead_request_set_crypt(subreq, areq->src, areq->dst, areq->cryptlen,
info);
aead_request_set_assoc(subreq, areq->assoc, areq->assoclen);
seqiv_geniv(ctx, info, req->seq, ivsize);
memcpy(req->giv, info, ivsize);
err = crypto_aead_encrypt(subreq);
if (unlikely(info != areq->iv))
seqiv_aead_complete2(req, err);
return err;
}
static int seqiv_aead_givencrypt_first(struct aead_givcrypt_request *req)
{
struct crypto_aead *geniv = aead_givcrypt_reqtfm(req);
struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
int err = 0;
spin_lock_bh(&ctx->lock);
if (crypto_aead_crt(geniv)->givencrypt != seqiv_aead_givencrypt_first)
goto unlock;
crypto_aead_crt(geniv)->givencrypt = seqiv_aead_givencrypt;
err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
crypto_aead_ivsize(geniv));
unlock:
spin_unlock_bh(&ctx->lock);
if (err)
return err;
return seqiv_aead_givencrypt(req);
}
