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cryptodev: fix the check of aes algorithm 

As the key length of xts(aes) is different with other mode of aes,
so we should check specially in cryptodev_builtin_get_aes_algo, if
it is xts mode.

Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
This commit is contained in:
Longpeng(Mike) 2016-12-05 19:39:08 +08:00 committed by Gonglei
parent a470b33259
commit 465f2fedd2
1 changed files with 33 additions and 14 deletions
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47
backends/cryptodev-builtin.c
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@ -111,23 +111,42 @@ cryptodev_builtin_get_unused_session_index(
return -1;
}
#define AES_KEYSIZE_128 16
#define AES_KEYSIZE_192 24
#define AES_KEYSIZE_256 32
#define AES_KEYSIZE_128_XTS AES_KEYSIZE_256
#define AES_KEYSIZE_256_XTS 64
static int
cryptodev_builtin_get_aes_algo(uint32_t key_len, Error **errp)
cryptodev_builtin_get_aes_algo(uint32_t key_len, int mode, Error **errp)
{
int algo;
if (key_len == 128 / 8) {
if (key_len == AES_KEYSIZE_128) {
algo = QCRYPTO_CIPHER_ALG_AES_128;
} else if (key_len == 192 / 8) {
} else if (key_len == AES_KEYSIZE_192) {
algo = QCRYPTO_CIPHER_ALG_AES_192;
} else if (key_len == 256 / 8) {
algo = QCRYPTO_CIPHER_ALG_AES_256;
} else if (key_len == AES_KEYSIZE_256) { /* equals AES_KEYSIZE_128_XTS */
if (mode == QCRYPTO_CIPHER_MODE_XTS) {
algo = QCRYPTO_CIPHER_ALG_AES_128;
} else {
algo = QCRYPTO_CIPHER_ALG_AES_256;
}
} else if (key_len == AES_KEYSIZE_256_XTS) {
if (mode == QCRYPTO_CIPHER_MODE_XTS) {
algo = QCRYPTO_CIPHER_ALG_AES_256;
} else {
goto err;
}
} else {
error_setg(errp, "Unsupported key length :%u", key_len);
return -1;
goto err;
}
return algo;
err:
error_setg(errp, "Unsupported key length :%u", key_len);
return -1;
}
static int cryptodev_builtin_create_cipher_session(
@ -155,32 +174,32 @@ static int cryptodev_builtin_create_cipher_session(
switch (sess_info->cipher_alg) {
case VIRTIO_CRYPTO_CIPHER_AES_ECB:
mode = QCRYPTO_CIPHER_MODE_ECB;
algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
errp);
mode, errp);
if (algo < 0) {
return -1;
}
mode = QCRYPTO_CIPHER_MODE_ECB;
break;
case VIRTIO_CRYPTO_CIPHER_AES_CBC:
mode = QCRYPTO_CIPHER_MODE_CBC;
algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
errp);
mode, errp);
if (algo < 0) {
return -1;
}
mode = QCRYPTO_CIPHER_MODE_CBC;
break;
case VIRTIO_CRYPTO_CIPHER_AES_CTR:
mode = QCRYPTO_CIPHER_MODE_CTR;
algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
errp);
mode, errp);
if (algo < 0) {
return -1;
}
mode = QCRYPTO_CIPHER_MODE_CTR;
break;
case VIRTIO_CRYPTO_CIPHER_DES_ECB:
algo = QCRYPTO_CIPHER_ALG_DES_RFB;
mode = QCRYPTO_CIPHER_MODE_ECB;
algo = QCRYPTO_CIPHER_ALG_DES_RFB;
break;
default:
error_setg(errp, "Unsupported cipher alg :%u",