drivers: crypto: generic resources for crypto device driver - CMAC

Add a generic cryptographic driver CMAC interface connecting TEE Crypto generic APIs to HW driver interface Signed-off-by: Cedric Neveux <[email protected]> Acked-by: Jens Wiklander <[email protected]> Reviewed-by: Etienne Carriere <[email protected]>
aananthcn · Jun 15, 2020 · b7604b9 · b7604b9
1 parent 9bdff33
commit b7604b9
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Showing 3 changed files with 16 additions and 5 deletions.
diff --git a/core/drivers/crypto/crypto_api/include/drvcrypt.h b/core/drivers/crypto/crypto_api/include/drvcrypt.h
@@ -50,6 +50,7 @@ struct drvcrypt_buf {
 enum drvcrypt_algo_id {
 	CRYPTO_HASH = 0, /* Hash driver */
 	CRYPTO_HMAC,	 /* HMAC driver */
+	CRYPTO_CMAC,	 /* CMAC driver */
 	CRYPTO_RSA,      /* Asymmetric RSA driver */
 	CRYPTO_MATH,	 /* Mathematical driver */
 	CRYPTO_CIPHER,   /* Cipher driver */

diff --git a/core/drivers/crypto/crypto_api/include/drvcrypt_mac.h b/core/drivers/crypto/crypto_api/include/drvcrypt_mac.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: BSD-2-Clause */
 /*
- * Copyright 2020 NXP
+ * Copyright 2019-2020 NXP
  *
  * MAC interface calling the HW crypto driver.
  */
@@ -27,4 +27,13 @@ static inline TEE_Result drvcrypt_register_hmac(drvcrypt_mac_allocate allocate)
 	return drvcrypt_register(CRYPTO_HMAC, (void *)allocate);
 }
 
+/*
+ * Register a CMAC processing driver in the crypto API
+ *
+ * @allocate - Callback for driver context allocation in the crypto layer
+ */
+static inline TEE_Result drvcrypt_register_cmac(drvcrypt_mac_allocate allocate)
+{
+	return drvcrypt_register(CRYPTO_CMAC, (void *)allocate);
+}
 #endif /* __DRVCRYPT_MAC_H__ */
diff --git a/core/drivers/crypto/crypto_api/mac/mac.c b/core/drivers/crypto/crypto_api/mac/mac.c
@@ -20,12 +20,13 @@ TEE_Result drvcrypt_mac_alloc_ctx(struct crypto_mac_ctx **ctx, uint32_t algo)
 
 	assert(ctx);
 
-	if (algo_id >= TEE_MAIN_ALGO_MD5 && algo_id <= TEE_MAIN_ALGO_SHA512) {
+	if (algo_id >= TEE_MAIN_ALGO_MD5 && algo_id <= TEE_MAIN_ALGO_SHA512)
 		mac_alloc = drvcrypt_get_ops(CRYPTO_HMAC);
+	else
+		mac_alloc = drvcrypt_get_ops(CRYPTO_CMAC);
 
-		if (mac_alloc)
-			ret = mac_alloc(ctx, algo);
-	}
+	if (mac_alloc)
+		ret = mac_alloc(ctx, algo);
 
 	CRYPTO_TRACE("mac alloc_ctx ret 0x%" PRIX32, ret);