On Thu, Jan 11, 2018 at 09:17:10AM +0000, Gilad Ben-Yossef wrote:
> Add CryptoCell ablkcipher support
>
Hello
I have some minor comments:
ablkcipher is deprecated, so you need to use skcipher instead.
> Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
> ---
> drivers/crypto/ccree/Makefile | 2 +-
> drivers/crypto/ccree/cc_buffer_mgr.c | 125 ++++
> drivers/crypto/ccree/cc_buffer_mgr.h | 10 +
> drivers/crypto/ccree/cc_cipher.c | 1167 ++++++++++++++++++++++++++++++++++
> drivers/crypto/ccree/cc_cipher.h | 74 +++
> drivers/crypto/ccree/cc_driver.c | 11 +
> drivers/crypto/ccree/cc_driver.h | 2 +
> 7 files changed, 1390 insertions(+), 1 deletion(-)
> create mode 100644 drivers/crypto/ccree/cc_cipher.c
> create mode 100644 drivers/crypto/ccree/cc_cipher.h
>
[...]
> +
> +struct tdes_keys {
> + u8 key1[DES_KEY_SIZE];
> + u8 key2[DES_KEY_SIZE];
> + u8 key3[DES_KEY_SIZE];
> +};
> +
> +static const u8 zero_buff[] = { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
> + 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
> + 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
> + 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0};
> +
This constant is used nowhere.
> +/* The function verifies that tdes keys are not weak.*/
> +static int cc_verify_3des_keys(const u8 *key, unsigned int keylen)
> +{
> + struct tdes_keys *tdes_key = (struct tdes_keys *)key;
> +
> + /* verify key1 != key2 and key3 != key2*/
> + if ((memcmp((u8 *)tdes_key->key1, (u8 *)tdes_key->key2,
> + sizeof(tdes_key->key1)) == 0) ||
> + (memcmp((u8 *)tdes_key->key3, (u8 *)tdes_key->key2,
> + sizeof(tdes_key->key3)) == 0)) {
> + return -ENOEXEC;
> + }
> +
> + return 0;
> +}
All driver testing 3des key also use des_ekey()
[...]
> +static void cc_cipher_complete(struct device *dev, void *cc_req, int err)
> +{
> + struct ablkcipher_request *areq = (struct ablkcipher_request *)cc_req;
> + struct scatterlist *dst = areq->dst;
> + struct scatterlist *src = areq->src;
> + struct blkcipher_req_ctx *req_ctx = ablkcipher_request_ctx(areq);
> + struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq);
> + unsigned int ivsize = crypto_ablkcipher_ivsize(tfm);
> + struct ablkcipher_request *req = (struct ablkcipher_request *)areq;
> +
> + cc_unmap_blkcipher_request(dev, req_ctx, ivsize, src, dst);
> + kfree(req_ctx->iv);
kzfree for all stuff with IV/key
[...]
> +
> +#ifdef CRYPTO_TFM_REQ_HW_KEY
> +
> +static inline bool cc_is_hw_key(struct crypto_tfm *tfm)
> +{
> + return (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_HW_KEY);
> +}
> +
> +#else
> +
> +struct arm_hw_key_info {
> + int hw_key1;
> + int hw_key2;
> +};
> +
> +static inline bool cc_is_hw_key(struct crypto_tfm *tfm)
> +{
> + return false;
> +}
> +
> +#endif /* CRYPTO_TFM_REQ_HW_KEY */
I see nowhere any use/documentation of CRYPTO_TFM_REQ_HW_KEY, so a cleaning could be done
Regards
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