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path: root/drivers/crypto/atmel-aes.c
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Diffstat (limited to 'drivers/crypto/atmel-aes.c')
-rw-r--r--drivers/crypto/atmel-aes.c214
1 files changed, 2 insertions, 212 deletions
diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c
index d1d93e897892..8bd64fc37e75 100644
--- a/drivers/crypto/atmel-aes.c
+++ b/drivers/crypto/atmel-aes.c
@@ -46,11 +46,6 @@
#define ATMEL_AES_BUFFER_ORDER 2
#define ATMEL_AES_BUFFER_SIZE (PAGE_SIZE << ATMEL_AES_BUFFER_ORDER)
-#define CFB8_BLOCK_SIZE 1
-#define CFB16_BLOCK_SIZE 2
-#define CFB32_BLOCK_SIZE 4
-#define CFB64_BLOCK_SIZE 8
-
#define SIZE_IN_WORDS(x) ((x) >> 2)
/* AES flags */
@@ -60,12 +55,6 @@
#define AES_FLAGS_OPMODE_MASK (AES_MR_OPMOD_MASK | AES_MR_CFBS_MASK)
#define AES_FLAGS_ECB AES_MR_OPMOD_ECB
#define AES_FLAGS_CBC AES_MR_OPMOD_CBC
-#define AES_FLAGS_OFB AES_MR_OPMOD_OFB
-#define AES_FLAGS_CFB128 (AES_MR_OPMOD_CFB | AES_MR_CFBS_128b)
-#define AES_FLAGS_CFB64 (AES_MR_OPMOD_CFB | AES_MR_CFBS_64b)
-#define AES_FLAGS_CFB32 (AES_MR_OPMOD_CFB | AES_MR_CFBS_32b)
-#define AES_FLAGS_CFB16 (AES_MR_OPMOD_CFB | AES_MR_CFBS_16b)
-#define AES_FLAGS_CFB8 (AES_MR_OPMOD_CFB | AES_MR_CFBS_8b)
#define AES_FLAGS_CTR AES_MR_OPMOD_CTR
#define AES_FLAGS_GCM AES_MR_OPMOD_GCM
#define AES_FLAGS_XTS AES_MR_OPMOD_XTS
@@ -87,7 +76,6 @@
struct atmel_aes_caps {
bool has_dualbuff;
- bool has_cfb64;
bool has_gcm;
bool has_xts;
bool has_authenc;
@@ -860,22 +848,6 @@ static int atmel_aes_dma_start(struct atmel_aes_dev *dd,
int err;
switch (dd->ctx->block_size) {
- case CFB8_BLOCK_SIZE:
- addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
- maxburst = 1;
- break;
-
- case CFB16_BLOCK_SIZE:
- addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
- maxburst = 1;
- break;
-
- case CFB32_BLOCK_SIZE:
- case CFB64_BLOCK_SIZE:
- addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- maxburst = 1;
- break;
-
case AES_BLOCK_SIZE:
addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
maxburst = dd->caps.max_burst_size;
@@ -1103,7 +1075,7 @@ static int atmel_aes_crypt(struct skcipher_request *req, unsigned long mode)
}
/*
- * ECB, CBC, CFB, OFB or CTR mode require the plaintext and ciphertext
+ * ECB, CBC or CTR mode require the plaintext and ciphertext
* to have a positve integer length.
*/
if (!req->cryptlen && opmode != AES_FLAGS_XTS)
@@ -1113,27 +1085,7 @@ static int atmel_aes_crypt(struct skcipher_request *req, unsigned long mode)
!IS_ALIGNED(req->cryptlen, crypto_skcipher_blocksize(skcipher)))
return -EINVAL;
- switch (mode & AES_FLAGS_OPMODE_MASK) {
- case AES_FLAGS_CFB8:
- ctx->block_size = CFB8_BLOCK_SIZE;
- break;
-
- case AES_FLAGS_CFB16:
- ctx->block_size = CFB16_BLOCK_SIZE;
- break;
-
- case AES_FLAGS_CFB32:
- ctx->block_size = CFB32_BLOCK_SIZE;
- break;
-
- case AES_FLAGS_CFB64:
- ctx->block_size = CFB64_BLOCK_SIZE;
- break;
-
- default:
- ctx->block_size = AES_BLOCK_SIZE;
- break;
- }
+ ctx->block_size = AES_BLOCK_SIZE;
ctx->is_aead = false;
rctx = skcipher_request_ctx(req);
@@ -1188,66 +1140,6 @@ static int atmel_aes_cbc_decrypt(struct skcipher_request *req)
return atmel_aes_crypt(req, AES_FLAGS_CBC);
}
-static int atmel_aes_ofb_encrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_OFB | AES_FLAGS_ENCRYPT);
-}
-
-static int atmel_aes_ofb_decrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_OFB);
-}
-
-static int atmel_aes_cfb_encrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB128 | AES_FLAGS_ENCRYPT);
-}
-
-static int atmel_aes_cfb_decrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB128);
-}
-
-static int atmel_aes_cfb64_encrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB64 | AES_FLAGS_ENCRYPT);
-}
-
-static int atmel_aes_cfb64_decrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB64);
-}
-
-static int atmel_aes_cfb32_encrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB32 | AES_FLAGS_ENCRYPT);
-}
-
-static int atmel_aes_cfb32_decrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB32);
-}
-
-static int atmel_aes_cfb16_encrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB16 | AES_FLAGS_ENCRYPT);
-}
-
-static int atmel_aes_cfb16_decrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB16);
-}
-
-static int atmel_aes_cfb8_encrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB8 | AES_FLAGS_ENCRYPT);
-}
-
-static int atmel_aes_cfb8_decrypt(struct skcipher_request *req)
-{
- return atmel_aes_crypt(req, AES_FLAGS_CFB8);
-}
-
static int atmel_aes_ctr_encrypt(struct skcipher_request *req)
{
return atmel_aes_crypt(req, AES_FLAGS_CTR | AES_FLAGS_ENCRYPT);
@@ -1319,76 +1211,6 @@ static struct skcipher_alg aes_algs[] = {
.ivsize = AES_BLOCK_SIZE,
},
{
- .base.cra_name = "ofb(aes)",
- .base.cra_driver_name = "atmel-ofb-aes",
- .base.cra_blocksize = 1,
- .base.cra_ctxsize = sizeof(struct atmel_aes_ctx),
-
- .init = atmel_aes_init_tfm,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- .setkey = atmel_aes_setkey,
- .encrypt = atmel_aes_ofb_encrypt,
- .decrypt = atmel_aes_ofb_decrypt,
- .ivsize = AES_BLOCK_SIZE,
-},
-{
- .base.cra_name = "cfb(aes)",
- .base.cra_driver_name = "atmel-cfb-aes",
- .base.cra_blocksize = 1,
- .base.cra_ctxsize = sizeof(struct atmel_aes_ctx),
-
- .init = atmel_aes_init_tfm,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- .setkey = atmel_aes_setkey,
- .encrypt = atmel_aes_cfb_encrypt,
- .decrypt = atmel_aes_cfb_decrypt,
- .ivsize = AES_BLOCK_SIZE,
-},
-{
- .base.cra_name = "cfb32(aes)",
- .base.cra_driver_name = "atmel-cfb32-aes",
- .base.cra_blocksize = CFB32_BLOCK_SIZE,
- .base.cra_ctxsize = sizeof(struct atmel_aes_ctx),
-
- .init = atmel_aes_init_tfm,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- .setkey = atmel_aes_setkey,
- .encrypt = atmel_aes_cfb32_encrypt,
- .decrypt = atmel_aes_cfb32_decrypt,
- .ivsize = AES_BLOCK_SIZE,
-},
-{
- .base.cra_name = "cfb16(aes)",
- .base.cra_driver_name = "atmel-cfb16-aes",
- .base.cra_blocksize = CFB16_BLOCK_SIZE,
- .base.cra_ctxsize = sizeof(struct atmel_aes_ctx),
-
- .init = atmel_aes_init_tfm,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- .setkey = atmel_aes_setkey,
- .encrypt = atmel_aes_cfb16_encrypt,
- .decrypt = atmel_aes_cfb16_decrypt,
- .ivsize = AES_BLOCK_SIZE,
-},
-{
- .base.cra_name = "cfb8(aes)",
- .base.cra_driver_name = "atmel-cfb8-aes",
- .base.cra_blocksize = CFB8_BLOCK_SIZE,
- .base.cra_ctxsize = sizeof(struct atmel_aes_ctx),
-
- .init = atmel_aes_init_tfm,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- .setkey = atmel_aes_setkey,
- .encrypt = atmel_aes_cfb8_encrypt,
- .decrypt = atmel_aes_cfb8_decrypt,
- .ivsize = AES_BLOCK_SIZE,
-},
-{
.base.cra_name = "ctr(aes)",
.base.cra_driver_name = "atmel-ctr-aes",
.base.cra_blocksize = 1,
@@ -1404,21 +1226,6 @@ static struct skcipher_alg aes_algs[] = {
},
};
-static struct skcipher_alg aes_cfb64_alg = {
- .base.cra_name = "cfb64(aes)",
- .base.cra_driver_name = "atmel-cfb64-aes",
- .base.cra_blocksize = CFB64_BLOCK_SIZE,
- .base.cra_ctxsize = sizeof(struct atmel_aes_ctx),
-
- .init = atmel_aes_init_tfm,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- .setkey = atmel_aes_setkey,
- .encrypt = atmel_aes_cfb64_encrypt,
- .decrypt = atmel_aes_cfb64_decrypt,
- .ivsize = AES_BLOCK_SIZE,
-};
-
/* gcm aead functions */
@@ -2407,9 +2214,6 @@ static void atmel_aes_unregister_algs(struct atmel_aes_dev *dd)
if (dd->caps.has_gcm)
crypto_unregister_aead(&aes_gcm_alg);
- if (dd->caps.has_cfb64)
- crypto_unregister_skcipher(&aes_cfb64_alg);
-
for (i = 0; i < ARRAY_SIZE(aes_algs); i++)
crypto_unregister_skcipher(&aes_algs[i]);
}
@@ -2434,14 +2238,6 @@ static int atmel_aes_register_algs(struct atmel_aes_dev *dd)
goto err_aes_algs;
}
- if (dd->caps.has_cfb64) {
- atmel_aes_crypto_alg_init(&aes_cfb64_alg.base);
-
- err = crypto_register_skcipher(&aes_cfb64_alg);
- if (err)
- goto err_aes_cfb64_alg;
- }
-
if (dd->caps.has_gcm) {
atmel_aes_crypto_alg_init(&aes_gcm_alg.base);
@@ -2482,8 +2278,6 @@ err_aes_authenc_alg:
err_aes_xts_alg:
crypto_unregister_aead(&aes_gcm_alg);
err_aes_gcm_alg:
- crypto_unregister_skcipher(&aes_cfb64_alg);
-err_aes_cfb64_alg:
i = ARRAY_SIZE(aes_algs);
err_aes_algs:
for (j = 0; j < i; j++)
@@ -2495,7 +2289,6 @@ err_aes_algs:
static void atmel_aes_get_cap(struct atmel_aes_dev *dd)
{
dd->caps.has_dualbuff = 0;
- dd->caps.has_cfb64 = 0;
dd->caps.has_gcm = 0;
dd->caps.has_xts = 0;
dd->caps.has_authenc = 0;
@@ -2507,7 +2300,6 @@ static void atmel_aes_get_cap(struct atmel_aes_dev *dd)
case 0x600:
case 0x500:
dd->caps.has_dualbuff = 1;
- dd->caps.has_cfb64 = 1;
dd->caps.has_gcm = 1;
dd->caps.has_xts = 1;
dd->caps.has_authenc = 1;
@@ -2515,13 +2307,11 @@ static void atmel_aes_get_cap(struct atmel_aes_dev *dd)
break;
case 0x200:
dd->caps.has_dualbuff = 1;
- dd->caps.has_cfb64 = 1;
dd->caps.has_gcm = 1;
dd->caps.max_burst_size = 4;
break;
case 0x130:
dd->caps.has_dualbuff = 1;
- dd->caps.has_cfb64 = 1;
dd->caps.max_burst_size = 4;
break;
case 0x120:
generated by cgit (git 2.34.1) at 2024-05-30 01:21:04 +0000