crypto: ccree - enable support for hardware keys

Enable CryptoCell support for hardware keys.

Hardware keys are regular AES keys loaded into CryptoCell internal memory
via firmware, often from secure boot ROM or hardware fuses at boot time.

As such, they can be used for enc/dec purposes like any other key but
cannot (read: extremely hard to) be extracted since since they are not
available anywhere in RAM during runtime.

The mechanism has some similarities to s390 secure keys although the keys
are not wrapped or sealed, but simply loaded offline. The interface was
therefore modeled based on the s390 secure keys support.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/testmgr.c

@@ -2581,6 +2581,13 @@ static const struct alg_test_desc alg_test_descs[] = {
 				.dec = __VECS(des3_ede_cbc_dec_tv_template)
 			}
 		}
+	}, {
+		/* Same as cbc(aes) except the key is stored in
+		 * hardware secure memory which we reference by index
+		 */
+		.alg = "cbc(paes)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
 	}, {
 		.alg = "cbc(serpent)",
 		.test = alg_test_skcipher,
@@ -2727,6 +2734,13 @@ static const struct alg_test_desc alg_test_descs[] = {
 				.dec = __VECS(des3_ede_ctr_dec_tv_template)
 			}
 		}
+	}, {
+		/* Same as ctr(aes) except the key is stored in
+		 * hardware secure memory which we reference by index
+		 */
+		.alg = "ctr(paes)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
 	}, {
 		.alg = "ctr(serpent)",
 		.test = alg_test_skcipher,
@@ -2997,6 +3011,13 @@ static const struct alg_test_desc alg_test_descs[] = {
 				}
 			}
 		}
+	}, {
+		/* Same as ecb(aes) except the key is stored in
+		 * hardware secure memory which we reference by index
+		 */
+		.alg = "ecb(paes)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
 	}, {
 		.alg = "ecb(khazad)",
 		.test = alg_test_skcipher,
@@ -3324,6 +3345,13 @@ static const struct alg_test_desc alg_test_descs[] = {
 				.dec = __VECS(aes_ofb_dec_tv_template)
 			}
 		}
+	}, {
+		/* Same as ofb(aes) except the key is stored in
+		 * hardware secure memory which we reference by index
+		 */
+		.alg = "ofb(paes)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
 	}, {
 		.alg = "pcbc(fcrypt)",
 		.test = alg_test_skcipher,
@@ -3581,6 +3609,21 @@ static const struct alg_test_desc alg_test_descs[] = {
 				.dec = __VECS(aes_xts_dec_tv_template)
 			}
 		}
+	}, {
+		/* Same as xts(aes) except the key is stored in
+		 * hardware secure memory which we reference by index
+		 */
+		.alg = "xts(paes)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
+	}, {
+		.alg = "xts4096(paes)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
+	}, {
+		.alg = "xts512(paes)",
+		.test = alg_test_null,
+		.fips_allowed = 1,
 	}, {
 		.alg = "xts(camellia)",
 		.test = alg_test_skcipher,

drivers/crypto/ccree/cc_cipher.h

@@ -13,18 +13,6 @@
 #include "cc_driver.h"
 #include "cc_buffer_mgr.h"
 
-/* Crypto cipher flags */
-#define CC_CRYPTO_CIPHER_KEY_KFDE0	BIT(0)
-#define CC_CRYPTO_CIPHER_KEY_KFDE1	BIT(1)
-#define CC_CRYPTO_CIPHER_KEY_KFDE2	BIT(2)
-#define CC_CRYPTO_CIPHER_KEY_KFDE3	BIT(3)
-#define CC_CRYPTO_CIPHER_DU_SIZE_512B	BIT(4)
-
-#define CC_CRYPTO_CIPHER_KEY_KFDE_MASK (CC_CRYPTO_CIPHER_KEY_KFDE0 | \
-					CC_CRYPTO_CIPHER_KEY_KFDE1 | \
-					CC_CRYPTO_CIPHER_KEY_KFDE2 | \
-					CC_CRYPTO_CIPHER_KEY_KFDE3)
-
 struct cipher_req_ctx {
 	struct async_gen_req_ctx gen_ctx;
 	enum cc_req_dma_buf_type dma_buf_type;
@@ -42,18 +30,12 @@ int cc_cipher_alloc(struct cc_drvdata *drvdata);
 
 int cc_cipher_free(struct cc_drvdata *drvdata);
 
-struct arm_hw_key_info {
-	int hw_key1;
-	int hw_key2;
-};
+struct cc_hkey_info {
+	u16 keylen;
+	u8 hw_key1;
+	u8 hw_key2;
+} __packed;
 
-/*
- * This is a stub function that will replaced when we
- * implement secure keys
- */
-static inline bool cc_is_hw_key(struct crypto_tfm *tfm)
-{
-	return false;
-}
+#define CC_HW_KEY_SIZE sizeof(struct cc_hkey_info)
 
 #endif /*__CC_CIPHER_H__*/