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Subject[PATCH 3/3] crypto: ccree: add SM4 support
Date
Add support for SM4 cipher in CryptoCell 713.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
---
drivers/crypto/Kconfig | 1 +
drivers/crypto/ccree/cc_cipher.c | 66 +++++++++++++++++++++++++++++++++
drivers/crypto/ccree/cc_hw_queue_defs.h | 3 ++
3 files changed, 70 insertions(+)

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index bea4de6..c7e6f5d 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -751,6 +751,7 @@ config CRYPTO_DEV_CCREE
select CRYPTO_ECB
select CRYPTO_CTR
select CRYPTO_XTS
+ select CRYPTO_SM4
help
Say 'Y' to enable a driver for the REE interface of the Arm
TrustZone CryptoCell family of processors. Currently the
diff --git a/drivers/crypto/ccree/cc_cipher.c b/drivers/crypto/ccree/cc_cipher.c
index 7623b299..989e70f 100644
--- a/drivers/crypto/ccree/cc_cipher.c
+++ b/drivers/crypto/ccree/cc_cipher.c
@@ -7,6 +7,7 @@
#include <crypto/internal/skcipher.h>
#include <crypto/des.h>
#include <crypto/xts.h>
+#include <crypto/sm4.h>
#include <crypto/scatterwalk.h>

#include "cc_driver.h"
@@ -83,6 +84,9 @@ static int validate_keys_sizes(struct cc_cipher_ctx *ctx_p, u32 size)
if (size == DES3_EDE_KEY_SIZE || size == DES_KEY_SIZE)
return 0;
break;
+ case S_DIN_to_SM4:
+ if (size == SM4_KEY_SIZE)
+ return 0;
default:
break;
}
@@ -122,6 +126,17 @@ static int validate_data_size(struct cc_cipher_ctx *ctx_p,
if (IS_ALIGNED(size, DES_BLOCK_SIZE))
return 0;
break;
+ case S_DIN_to_SM4:
+ switch (ctx_p->cipher_mode) {
+ case DRV_CIPHER_CTR:
+ return 0;
+ case DRV_CIPHER_ECB:
+ case DRV_CIPHER_CBC:
+ if (IS_ALIGNED(size, SM4_BLOCK_SIZE))
+ return 0;
+ default:
+ break;
+ }
default:
break;
}
@@ -522,6 +537,9 @@ static void cc_setup_cipher_data(struct crypto_tfm *tfm,
case S_DIN_to_DES:
flow_mode = DIN_DES_DOUT;
break;
+ case S_DIN_to_SM4:
+ flow_mode = DIN_SM4_DOUT;
+ break;
default:
dev_err(dev, "invalid flow mode, flow_mode = %d\n", flow_mode);
return;
@@ -1324,6 +1342,54 @@ static const struct cc_alg_template skcipher_algs[] = {
.flow_mode = S_DIN_to_DES,
.min_hw_rev = CC_HW_REV_630,
},
+ {
+ .name = "cbc(sm4)",
+ .driver_name = "cbc-sm4-ccree",
+ .blocksize = SM4_BLOCK_SIZE,
+ .template_skcipher = {
+ .setkey = cc_cipher_setkey,
+ .encrypt = cc_cipher_encrypt,
+ .decrypt = cc_cipher_decrypt,
+ .min_keysize = SM4_KEY_SIZE,
+ .max_keysize = SM4_KEY_SIZE,
+ .ivsize = SM4_BLOCK_SIZE,
+ },
+ .cipher_mode = DRV_CIPHER_CBC,
+ .flow_mode = S_DIN_to_SM4,
+ .min_hw_rev = CC_HW_REV_713,
+ },
+ {
+ .name = "ecb(sm4)",
+ .driver_name = "ecb-sm4-ccree",
+ .blocksize = SM4_BLOCK_SIZE,
+ .template_skcipher = {
+ .setkey = cc_cipher_setkey,
+ .encrypt = cc_cipher_encrypt,
+ .decrypt = cc_cipher_decrypt,
+ .min_keysize = SM4_KEY_SIZE,
+ .max_keysize = SM4_KEY_SIZE,
+ .ivsize = 0,
+ },
+ .cipher_mode = DRV_CIPHER_ECB,
+ .flow_mode = S_DIN_to_SM4,
+ .min_hw_rev = CC_HW_REV_713,
+ },
+ {
+ .name = "ctr(sm4)",
+ .driver_name = "ctr-sm4-ccree",
+ .blocksize = SM4_BLOCK_SIZE,
+ .template_skcipher = {
+ .setkey = cc_cipher_setkey,
+ .encrypt = cc_cipher_encrypt,
+ .decrypt = cc_cipher_decrypt,
+ .min_keysize = SM4_KEY_SIZE,
+ .max_keysize = SM4_KEY_SIZE,
+ .ivsize = SM4_BLOCK_SIZE,
+ },
+ .cipher_mode = DRV_CIPHER_CTR,
+ .flow_mode = S_DIN_to_SM4,
+ .min_hw_rev = CC_HW_REV_713,
+ },
};

static struct cc_crypto_alg *cc_create_alg(const struct cc_alg_template *tmpl,
diff --git a/drivers/crypto/ccree/cc_hw_queue_defs.h b/drivers/crypto/ccree/cc_hw_queue_defs.h
index a091ae5..6bd1922 100644
--- a/drivers/crypto/ccree/cc_hw_queue_defs.h
+++ b/drivers/crypto/ccree/cc_hw_queue_defs.h
@@ -107,6 +107,7 @@ enum cc_flow_mode {
AES_to_AES_to_HASH_and_DOUT = 13,
AES_to_AES_to_HASH = 14,
AES_to_HASH_and_AES = 15,
+ DIN_SM4_DOUT = 16,
DIN_AES_AESMAC = 17,
HASH_to_DOUT = 18,
/* setup flows */
@@ -114,9 +115,11 @@ enum cc_flow_mode {
S_DIN_to_AES2 = 33,
S_DIN_to_DES = 34,
S_DIN_to_RC4 = 35,
+ S_DIN_to_SM4 = 36,
S_DIN_to_HASH = 37,
S_AES_to_DOUT = 38,
S_AES2_to_DOUT = 39,
+ S_SM4_to_DOUT = 40,
S_RC4_to_DOUT = 41,
S_DES_to_DOUT = 42,
S_HASH_to_DOUT = 43,
--
2.7.4
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