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(sha256) HMAC algorithm support
and the message digest size is 32 bytes.
Signed-off-by: Keerthy <j-keerthy@xxxxxx>
---
drivers/crypto/sa2ul.c | 52 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/drivers/crypto/sa2ul.c b/drivers/crypto/sa2ul.c
index e3a1321f0666..74211cd21c62 100644
--- a/drivers/crypto/sa2ul.c
+++ b/drivers/crypto/sa2ul.c
@@ -1673,11 +1673,38 @@ static int sa_sham_sha1_setkey(struct crypto_ahash *tfm, const u8 *key,
return sa_sham_setkey(tfm, key, keylen, ad);
}
+static int sa_sham_sha256_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_SHA2_256;
+ ad->hash_size = SHA256_DIGEST_SIZE;
+ ad->auth_ctrl = 0x4;
+ ad->prep_iopad = sa_hmac_sha256_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 int sa_sham_cra_sha256_init(struct crypto_tfm *tfm)
+{
+ return sa_sham_cra_init_alg(tfm, "sha256");
+}
+
static void sa_sham_cra_exit(struct crypto_tfm *tfm)
{
struct crypto_alg *alg = tfm->__crt_alg;
@@ -1839,6 +1866,31 @@ static struct ahash_alg algs_sha[] = {
.cra_exit = sa_sham_cra_exit,
}
},
+{
+ .init = sa_sham_init,
+ .update = sa_sham_update,
+ .final = sa_sham_final,
+ .finup = sa_sham_finup,
+ .digest = sa_sham_digest,
+ .setkey = sa_sham_sha256_setkey,
+ .halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.statesize = 128,
+ .halg.base = {
+ .cra_name = "hmac(sha256)",
+ .cra_driver_name = "sa-hmac-sha256",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sa_tfm_ctx),
+ .cra_alignmask = SA_ALIGN_MASK,
+ .cra_module = THIS_MODULE,
+ .cra_init = sa_sham_cra_sha256_init,
+ .cra_exit = sa_sham_cra_exit,
+ }
+},
};
/* Register the algorithms in crypto framework */
--
2.17.1
