@@ -687,7 +687,7 @@ static int cc_cipher_process(struct skcipher_request *req,
struct device *dev = drvdata_to_dev(ctx_p->drvdata);
struct cc_hw_desc desc[MAX_ABLKCIPHER_SEQ_LEN];
struct cc_crypto_req cc_req = {};
- int rc, cts_restore_flag = 0;
+ int rc;
unsigned int seq_len = 0;
gfp_t flags = cc_gfp_flags(&req->base);
@@ -719,13 +719,6 @@ static int cc_cipher_process(struct skcipher_request *req,
goto exit_process;
}
- /*For CTS in case of data size aligned to 16 use CBC mode*/
- if (((nbytes % AES_BLOCK_SIZE) == 0) &&
- ctx_p->cipher_mode == DRV_CIPHER_CBC_CTS) {
- ctx_p->cipher_mode = DRV_CIPHER_CBC;
- cts_restore_flag = 1;
- }
-
/* Setup request structure */
cc_req.user_cb = (void *)cc_cipher_complete;
cc_req.user_arg = (void *)req;
@@ -770,9 +763,6 @@ static int cc_cipher_process(struct skcipher_request *req,
}
exit_process:
- if (cts_restore_flag)
- ctx_p->cipher_mode = DRV_CIPHER_CBC_CTS;
-
if (rc != -EINPROGRESS && rc != -EBUSY) {
kzfree(req_ctx->backup_info);
kzfree(req_ctx->iv);
@@ -1026,8 +1016,8 @@ static const struct cc_alg_template skcipher_algs[] = {
.min_hw_rev = CC_HW_REV_712,
},
{
- .name = "cts1(cbc(paes))",
- .driver_name = "cts1-cbc-paes-ccree",
+ .name = "cts(cbc(paes))",
+ .driver_name = "cts-cbc-paes-ccree",
.blocksize = AES_BLOCK_SIZE,
.type = CRYPTO_ALG_TYPE_ABLKCIPHER,
.template_skcipher = {
@@ -1261,8 +1251,8 @@ static const struct cc_alg_template skcipher_algs[] = {
.min_hw_rev = CC_HW_REV_630,
},
{
- .name = "cts1(cbc(aes))",
- .driver_name = "cts1-cbc-aes-ccree",
+ .name = "cts(cbc(aes))",
+ .driver_name = "cts-cbc-aes-ccree",
.blocksize = AES_BLOCK_SIZE,
.type = CRYPTO_ALG_TYPE_ABLKCIPHER,
.template_skcipher = {
The ccree driver implemented NIST 800-38A CBC-CS2 ciphertext format, which only reverses the last two blocks if the stolen ciphertext amount are none zero. Move it to the kernel chosen format of CBC-CS3 which swaps the final blocks unconditionally and rename it to "cts" now that it complies with the kernel format and passes the self tests. Ironically, the CryptoCell REE HW does just that, so the fix is dropping the code that forced it to use plain CBC if the ciphertext was block aligned. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> --- drivers/crypto/ccree/cc_cipher.c | 20 +++++--------------- 1 file changed, 5 insertions(+), 15 deletions(-) -- 2.7.4