HMAC hash-based message authentication code) is a specific type of
message authentication code (MAC) involving a cryptographic hash
function and a secret cryptographic key. It may be used to
simultaneously verify both the data integrity and the authentication
of a message, as with any MAC. Add hmac(sha1) HMAC algorithm support
and the message digest size is 20 bytes.
Signed-off-by: Keerthy <j-keer...@ti.com>
---
drivers/crypto/sa2ul.c | 347 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 347 insertions(+)
diff --git a/drivers/crypto/sa2ul.c b/drivers/crypto/sa2ul.c
index 9c9008e21867..e3a1321f0666 100644
--- a/drivers/crypto/sa2ul.c
+++ b/drivers/crypto/sa2ul.c
@@ -1408,6 +1408,307 @@ static int sa_aead_decrypt(struct aead_request *req)
return sa_aead_run(req, req->iv, 0);
}
+static int sa_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base)
+{
+ struct sa_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct sa_crypto_data *data = dev_get_drvdata(sa_k3_dev);
+ int ret;
+
+ if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+ CRYPTO_ALG_TYPE_AHASH) {
+ memset(ctx, 0, sizeof(*ctx));
+ ctx->dev_data = data;
+ ret = sa_init_ctx_info(&ctx->enc, data);
+ if (ret)
+ return ret;
+ }
+
+ if (alg_base) {
+ ctx->shash = crypto_alloc_shash(alg_base, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(ctx->shash)) {
+ pr_err("base driver %s couldn't be loaded\n", alg_base);
+ return PTR_ERR(ctx->shash);
+ }
+ }
+
+ dev_dbg(sa_k3_dev, "%s(0x%p) sc-ids(0x%x(0x%pad), 0x%x(0x%pad))\n",
+ __func__, tfm, ctx->enc.sc_id, &ctx->enc.sc_phys,
+ ctx->dec.sc_id, &ctx->dec.sc_phys);
+
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct sa_dma_req_ctx) +
+ SHA512_BLOCK_SIZE);
+
+ return 0;
+}
+
+static void sa_sham_dma_in_callback(void *data)
+{
+ struct sa_rx_data *rxd = (struct sa_rx_data *)data;
+ struct ahash_request *req = (struct ahash_request *)rxd->req;
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ unsigned int authsize = crypto_ahash_digestsize(tfm);
+ int i, sg_nents;
+ size_t ml, pl;
+ u32 *mdptr, *result;
+
+ mdptr = (u32 *)dmaengine_desc_get_metadata_ptr(rxd->tx_in, &pl, &ml);
+ result = (u32 *)req->result;
+
+ kfree(rxd);
+
+ for (i = 0; i < (authsize / 4); i++)
+ result[i] = htonl(mdptr[i + 4]);
+
+ sg_nents = sg_nents_for_len(req->src, req->nbytes);
+ dma_unmap_sg(rxd->ddev, req->src, sg_nents, DMA_FROM_DEVICE);
+
+ ahash_request_complete(req, 0);
+
+ kfree(rxd);
+}
+
+static int sa_sham_digest(struct ahash_request *req)
+{
+ struct sa_tfm_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct sa_ctx_info *sa_ctx = &ctx->enc;
+ struct dma_async_tx_descriptor *tx_in, *tx_out;
+ struct sa_crypto_data *pdata = dev_get_drvdata(sa_k3_dev);
+ struct sa_dma_req_ctx req_ctx;
+ struct sa_rx_data *rxd;
+ u8 enc_offset;
+ int sg_nents;
+ int psdata_offset;
+ u8 auth_offset = 0;
+ u8 *auth_iv = NULL;
+ u8 *aad = NULL;
+ u8 aad_len = 0;
+ u16 enc_len;
+ u16 auth_len = 0;
+ u32 req_type;
+ u32 *mdptr;
+ struct dma_chan *dma_rx;
+ gfp_t flags;
+ size_t pl, ml;
+ struct device *ddev;
+
+ flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
+ GFP_KERNEL : GFP_ATOMIC;
+ enc_len = 0;
+ auth_len = req->nbytes;
+ enc_offset = 0;
+
+ if (enc_len > 256)
+ dma_rx = pdata->dma_rx2;
+ else
+ dma_rx = pdata->dma_rx1;
+
+ ddev = dma_rx->device->dev;
+ /* Allocate descriptor & submit packet */
+ sg_nents = sg_nents_for_len(req->src, req->nbytes);
+
+ memcpy(req_ctx.cmdl, sa_ctx->cmdl, sa_ctx->cmdl_size);
+ /* Update Command Label */
+ sa_update_cmdl(sa_k3_dev, enc_offset, enc_len,
+ NULL, auth_offset, auth_len,
+ auth_iv, aad_len, aad,
+ &sa_ctx->cmdl_upd_info, req_ctx.cmdl);
+
+ /*
+ * Last 2 words in PSDATA will have the crypto alg type &
+ * crypto request pointer
+ */
+ req_type = CRYPTO_ALG_TYPE_AHASH;
+
+ psdata_offset = sa_ctx->cmdl_size / sizeof(u32);
+ req_ctx.cmdl[psdata_offset++] = req_type;
+
+ /* map the packet */
+ req_ctx.src = req->src;
+ req_ctx.src_nents = dma_map_sg(ddev, req->src, sg_nents, DMA_TO_DEVICE);
+
+ if (unlikely(req_ctx.src_nents != sg_nents)) {
+ dev_warn_ratelimited(sa_k3_dev, "failed to map tx pkt\n");
+ return -EIO;
+ }
+
+ req_ctx.dev_data = pdata;
+ req_ctx.pkt = true;
+
+ dma_sync_sg_for_device(pdata->dev, req->src, req_ctx.src_nents,
+ DMA_TO_DEVICE);
+
+ tx_in = dmaengine_prep_slave_sg(dma_rx, req->src, req_ctx.src_nents,
+ DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!tx_in) {
+ dev_err(pdata->dev, "IN prep_slave_sg() failed\n");
+ return -EINVAL;
+ }
+
+ rxd = kzalloc(sizeof(*rxd), GFP_KERNEL);
+ rxd->req = (void *)req;
+ rxd->tx_in = tx_in;
+ rxd->ddev = ddev;
+ tx_in->callback = sa_sham_dma_in_callback;
+ tx_in->callback_param = rxd;
+
+ tx_out = dmaengine_prep_slave_sg(pdata->dma_tx, req->src,
+ req_ctx.src_nents, DMA_MEM_TO_DEV,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!tx_out) {
+ dev_err(pdata->dev, "OUT prep_slave_sg() failed\n");
+ return -EINVAL;
+ }
+
+ mdptr = (u32 *)dmaengine_desc_get_metadata_ptr(tx_out, &pl, &ml);
+ sa_prepare_tx_desc(mdptr, (sa_ctx->cmdl_size + (SA_PSDATA_CTX_WORDS *
+ sizeof(u32))), req_ctx.cmdl,
+ sizeof(sa_ctx->epib), sa_ctx->epib);
+
+ dmaengine_desc_set_metadata_len(tx_out, 28);
+
+ dmaengine_submit(tx_out);
+ dmaengine_submit(tx_in);
+
+ dma_async_issue_pending(dma_rx);
+ dma_async_issue_pending(pdata->dma_tx);
+
+ return -EINPROGRESS;
+}
+
+static int sa_sham_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+
+ dev_dbg(sa_k3_dev, "init: digest size: %d\n",
+ crypto_ahash_digestsize(tfm));
+
+ return 0;
+}
+
+static int sa_sham_shash_digest(struct crypto_shash *tfm, u32 flags,
+ const u8 *data, unsigned int len, u8 *out)
+{
+ SHASH_DESC_ON_STACK(shash, tfm);
+
+ shash->tfm = tfm;
+
+ return crypto_shash_digest(shash, data, len, out);
+}
+
+static int sa_sham_setkey(struct crypto_ahash *tfm, const u8 *key,
+ unsigned int keylen, struct algo_data *ad)
+{
+ struct sa_tfm_ctx *ctx = crypto_ahash_ctx(tfm);
+ int bs = crypto_shash_blocksize(ctx->shash);
+ int ds = crypto_shash_digestsize(ctx->shash);
+ int cmdl_len;
+ struct sa_cmdl_cfg cfg;
+ int err;
+
+ if (keylen > bs) {
+ err = sa_sham_shash_digest(ctx->shash,
+ crypto_shash_get_flags(ctx->shash),
+ key, keylen, ctx->authkey);
+ if (err)
+ return err;
+ keylen = ds;
+ } else {
+ memcpy(ctx->authkey, key, keylen);
+ }
+
+ memset(ctx->authkey + keylen, 0, bs - keylen);
+ memset(&cfg, 0, sizeof(cfg));
+ cfg.enc1st = 0;
+ cfg.aalg = ad->aalg_id;
+ cfg.enc_eng_id = ad->enc_eng.eng_id;
+ cfg.auth_eng_id = ad->auth_eng.eng_id;
+ cfg.iv_size = 0;
+ cfg.akey = ctx->authkey;
+ cfg.akey_len = keylen;
+
+ /* Setup Encryption Security Context & Command label template */
+ if (sa_init_sc(&ctx->enc, NULL, 0, ctx->authkey, keylen, ad, 0,
+ &ctx->enc.epib[1], true))
+ goto badkey;
+
+ cmdl_len = sa_format_cmdl_gen(&cfg,
+ (u8 *)ctx->enc.cmdl,
+ &ctx->enc.cmdl_upd_info);
+ if (cmdl_len <= 0 || (cmdl_len > SA_MAX_CMDL_WORDS * sizeof(u32)))
+ goto badkey;
+
+ ctx->enc.cmdl_size = cmdl_len;
+
+ kfree(ad);
+
+ return 0;
+badkey:
+ dev_err(sa_k3_dev, "%s: badkey\n", __func__);
+ return -EINVAL;
+}
+
+static int sa_sham_sha1_setkey(struct crypto_ahash *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct algo_data *ad = kzalloc(sizeof(*ad), GFP_KERNEL);
+
+ ad->enc_eng.eng_id = SA_ENG_ID_NONE;
+ ad->enc_eng.sc_size = SA_CTX_ENC_TYPE1_SZ;
+ ad->auth_eng.eng_id = SA_ENG_ID_AM1;
+ ad->auth_eng.sc_size = SA_CTX_AUTH_TYPE2_SZ;
+ ad->mci_enc = NULL;
+ ad->mci_dec = NULL;
+ ad->inv_key = false;
+ ad->keyed_mac = true;
+ ad->ealg_id = SA_EALG_ID_NONE;
+ ad->aalg_id = SA_AALG_ID_HMAC_SHA1;
+ ad->hash_size = SHA1_DIGEST_SIZE;
+ ad->auth_ctrl = 0x2;
+ ad->prep_iopad = sa_hmac_sha1_get_pad;
+
+ return sa_sham_setkey(tfm, key, keylen, ad);
+}
+
+static int sa_sham_cra_sha1_init(struct crypto_tfm *tfm)
+{
+ return sa_sham_cra_init_alg(tfm, "sha1");
+}
+
+static void sa_sham_cra_exit(struct crypto_tfm *tfm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct sa_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct sa_crypto_data *data = dev_get_drvdata(sa_k3_dev);
+
+ dev_dbg(sa_k3_dev, "%s(0x%p) sc-ids(0x%x(0x%pad), 0x%x(0x%pad))\n",
+ __func__, tfm, ctx->enc.sc_id, &ctx->enc.sc_phys,
+ ctx->dec.sc_id, &ctx->dec.sc_phys);
+
+ if ((alg->cra_flags & CRYPTO_ALG_TYPE_AHASH)
+ == CRYPTO_ALG_TYPE_AHASH) {
+ sa_free_ctx_info(&ctx->enc, data);
+ }
+}
+
+static int sa_sham_update(struct ahash_request *req)
+{
+ return -ENOTSUPP;
+}
+
+static int sa_sham_final(struct ahash_request *req)
+{
+ return sa_sham_digest(req);
+}
+
+static int sa_sham_finup(struct ahash_request *req)
+{
+ return sa_sham_digest(req);
+}
+
static struct sa_alg_tmpl sa_algs[] = {
{.type = CRYPTO_ALG_TYPE_ABLKCIPHER,
.alg.crypto = {
@@ -1512,6 +1813,34 @@ static struct sa_alg_tmpl sa_algs[] = {
},
};
+static struct ahash_alg algs_sha[] = {
+{
+ .init = sa_sham_init,
+ .update = sa_sham_update,
+ .final = sa_sham_final,
+ .finup = sa_sham_finup,
+ .digest = sa_sham_digest,
+ .setkey = sa_sham_sha1_setkey,
+ .halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.statesize = 128,
+ .halg.base = {
+ .cra_name = "hmac(sha1)",
+ .cra_driver_name = "sa-hmac-sha1",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sa_tfm_ctx),
+ .cra_alignmask = SA_ALIGN_MASK,
+ .cra_module = THIS_MODULE,
+ .cra_init = sa_sham_cra_sha1_init,
+ .cra_exit = sa_sham_cra_exit,
+ }
+},
+};
+
/* Register the algorithms in crypto framework */
void sa_register_algos(const struct device *dev)
{
@@ -1539,6 +1868,15 @@ void sa_register_algos(const struct device *dev)
else
sa_algs[i].registered = 1;
}
+
+ num_algs = ARRAY_SIZE(algs_sha);
+ for (i = 0; i < num_algs; i++) {
+ alg_name = algs_sha[i].halg.base.cra_name;
+ err = crypto_register_ahash(&algs_sha[i]);
+ if (err)
+ dev_err(dev, "Failed to register '%s'\n",
+ alg_name);
+ }
}
/* Unregister the algorithms in crypto framework */
@@ -1560,6 +1898,15 @@ void sa_unregister_algos(const struct device *dev)
sa_algs[i].registered = 0;
}
+
+ num_algs = ARRAY_SIZE(algs_sha);
+ for (i = 0; i < num_algs; i++) {
+ alg_name = algs_sha[i].halg.base.cra_name;
+ err = crypto_unregister_ahash(&algs_sha[i]);
+ if (err)
+ dev_err(dev, "Failed to register '%s'\n",
+ alg_name);
+ }
}
static int sa_init_mem(struct sa_crypto_data *dev_data)
--
2.17.1
