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crypto: ccree - enable CTS support in AES-XTS 

In XTS encryption/decryption the plaintext byte size
can be >= AES_BLOCK_SIZE. This patch enable the AES-XTS ciphertext
stealing implementation in ccree driver.

Signed-off-by: Uri Shir <uri.shir@arm.com>
Acked-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Uri Shir 2019-09-08 11:04:26 +03:00 committed by Herbert Xu
parent 465527bcae
commit 67caef08a7
1 changed files with 6 additions and 10 deletions
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16
drivers/crypto/ccree/cc_cipher.c
View File

@ -116,10 +116,6 @@ static int validate_data_size(struct cc_cipher_ctx *ctx_p,
case S_DIN_to_AES:
switch (ctx_p->cipher_mode) {
case DRV_CIPHER_XTS:
if (size >= AES_BLOCK_SIZE &&
IS_ALIGNED(size, AES_BLOCK_SIZE))
return 0;
break;
case DRV_CIPHER_CBC_CTS:
if (size >= AES_BLOCK_SIZE)
return 0;
@ -938,7 +934,7 @@ static const struct cc_alg_template skcipher_algs[] = {
{
.name = "xts(paes)",
.driver_name = "xts-paes-ccree",
.blocksize = AES_BLOCK_SIZE,
.blocksize = 1,
.template_skcipher = {
.setkey = cc_cipher_sethkey,
.encrypt = cc_cipher_encrypt,
@ -956,7 +952,7 @@ static const struct cc_alg_template skcipher_algs[] = {
{
.name = "xts512(paes)",
.driver_name = "xts-paes-du512-ccree",
.blocksize = AES_BLOCK_SIZE,
.blocksize = 1,
.template_skcipher = {
.setkey = cc_cipher_sethkey,
.encrypt = cc_cipher_encrypt,
@ -975,7 +971,7 @@ static const struct cc_alg_template skcipher_algs[] = {
{
.name = "xts4096(paes)",
.driver_name = "xts-paes-du4096-ccree",
.blocksize = AES_BLOCK_SIZE,
.blocksize = 1,
.template_skcipher = {
.setkey = cc_cipher_sethkey,
.encrypt = cc_cipher_encrypt,
@ -1196,7 +1192,7 @@ static const struct cc_alg_template skcipher_algs[] = {
{
.name = "xts(aes)",
.driver_name = "xts-aes-ccree",
.blocksize = AES_BLOCK_SIZE,
.blocksize = 1,
.template_skcipher = {
.setkey = cc_cipher_setkey,
.encrypt = cc_cipher_encrypt,
@ -1213,7 +1209,7 @@ static const struct cc_alg_template skcipher_algs[] = {
{
.name = "xts512(aes)",
.driver_name = "xts-aes-du512-ccree",
.blocksize = AES_BLOCK_SIZE,
.blocksize = 1,
.template_skcipher = {
.setkey = cc_cipher_setkey,
.encrypt = cc_cipher_encrypt,
@ -1231,7 +1227,7 @@ static const struct cc_alg_template skcipher_algs[] = {
{
.name = "xts4096(aes)",
.driver_name = "xts-aes-du4096-ccree",
.blocksize = AES_BLOCK_SIZE,
.blocksize = 1,
.template_skcipher = {
.setkey = cc_cipher_setkey,
.encrypt = cc_cipher_encrypt,