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crypto: mediatek - add support to OFB/CFB mode 

This patch adds support to OFB/CFB mode.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Vic Wu <vic.wu@mediatek.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ryder Lee 2019-08-28 14:37:15 +08:00 committed by Herbert Xu
parent f271ea9fe1
commit 069ec89182
1 changed files with 78 additions and 7 deletions
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85
drivers/crypto/mediatek/mtk-aes.c
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@ -23,7 +23,7 @@
#define AES_CT_CTRL_HDR cpu_to_le32(0x00220000)
/* AES-CBC/ECB/CTR command token */
/* AES-CBC/ECB/CTR/OFB/CFB command token */
#define AES_CMD0 cpu_to_le32(0x05000000)
#define AES_CMD1 cpu_to_le32(0x2d060000)
#define AES_CMD2 cpu_to_le32(0xe4a63806)
@ -50,6 +50,8 @@
/* AES transform information word 1 fields */
#define AES_TFM_ECB cpu_to_le32(0x0 << 0)
#define AES_TFM_CBC cpu_to_le32(0x1 << 0)
#define AES_TFM_OFB cpu_to_le32(0x4 << 0)
#define AES_TFM_CFB128 cpu_to_le32(0x5 << 0)
#define AES_TFM_CTR_INIT cpu_to_le32(0x2 << 0) /* init counter to 1 */
#define AES_TFM_CTR_LOAD cpu_to_le32(0x6 << 0) /* load/reuse counter */
#define AES_TFM_3IV cpu_to_le32(0x7 << 5) /* using IV 0-2 */
@ -58,13 +60,15 @@
#define AES_TFM_ENC_HASH cpu_to_le32(0x1 << 17)
/* AES flags */
#define AES_FLAGS_CIPHER_MSK GENMASK(2, 0)
#define AES_FLAGS_CIPHER_MSK GENMASK(4, 0)
#define AES_FLAGS_ECB BIT(0)
#define AES_FLAGS_CBC BIT(1)
#define AES_FLAGS_CTR BIT(2)
#define AES_FLAGS_GCM BIT(3)
#define AES_FLAGS_ENCRYPT BIT(4)
#define AES_FLAGS_BUSY BIT(5)
#define AES_FLAGS_OFB BIT(3)
#define AES_FLAGS_CFB128 BIT(4)
#define AES_FLAGS_GCM BIT(5)
#define AES_FLAGS_ENCRYPT BIT(6)
#define AES_FLAGS_BUSY BIT(7)
#define AES_AUTH_TAG_ERR cpu_to_le32(BIT(26))
@ -405,7 +409,7 @@ exit:
return mtk_aes_complete(cryp, aes, -EINVAL);
}
/* Initialize transform information of CBC/ECB/CTR mode */
/* Initialize transform information of CBC/ECB/CTR/OFB/CFB mode */
static void mtk_aes_info_init(struct mtk_cryp *cryp, struct mtk_aes_rec *aes,
size_t len)
{
@ -434,7 +438,12 @@ static void mtk_aes_info_init(struct mtk_cryp *cryp, struct mtk_aes_rec *aes,
case AES_FLAGS_CTR:
info->tfm[1] = AES_TFM_CTR_LOAD;
goto ctr;
case AES_FLAGS_OFB:
info->tfm[1] = AES_TFM_OFB;
break;
case AES_FLAGS_CFB128:
info->tfm[1] = AES_TFM_CFB128;
break;
default:
/* Should not happen... */
return;
@ -697,6 +706,26 @@ static int mtk_aes_ctr_decrypt(struct ablkcipher_request *req)
return mtk_aes_crypt(req, AES_FLAGS_CTR);
}
static int mtk_aes_ofb_encrypt(struct ablkcipher_request *req)
{
return mtk_aes_crypt(req, AES_FLAGS_ENCRYPT | AES_FLAGS_OFB);
}
static int mtk_aes_ofb_decrypt(struct ablkcipher_request *req)
{
return mtk_aes_crypt(req, AES_FLAGS_OFB);
}
static int mtk_aes_cfb_encrypt(struct ablkcipher_request *req)
{
return mtk_aes_crypt(req, AES_FLAGS_ENCRYPT | AES_FLAGS_CFB128);
}
static int mtk_aes_cfb_decrypt(struct ablkcipher_request *req)
{
return mtk_aes_crypt(req, AES_FLAGS_CFB128);
}
static int mtk_aes_cra_init(struct crypto_tfm *tfm)
{
struct mtk_aes_ctx *ctx = crypto_tfm_ctx(tfm);
@ -778,6 +807,48 @@ static struct crypto_alg aes_algs[] = {
.decrypt = mtk_aes_ctr_decrypt,
}
},
{
.cra_name = "ofb(aes)",
.cra_driver_name = "ofb-aes-mtk",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
CRYPTO_ALG_ASYNC,
.cra_init = mtk_aes_cra_init,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct mtk_aes_ctx),
.cra_alignmask = 0xf,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_u.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = mtk_aes_setkey,
.encrypt = mtk_aes_ofb_encrypt,
.decrypt = mtk_aes_ofb_decrypt,
}
},
{
.cra_name = "cfb(aes)",
.cra_driver_name = "cfb-aes-mtk",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
CRYPTO_ALG_ASYNC,
.cra_init = mtk_aes_cra_init,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct mtk_aes_ctx),
.cra_alignmask = 0xf,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_u.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = mtk_aes_setkey,
.encrypt = mtk_aes_cfb_encrypt,
.decrypt = mtk_aes_cfb_decrypt,
}
},
};
static inline struct mtk_aes_gcm_ctx *