microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность

crypto: ccree - convert to use crypto_authenc_extractkeys() 

Convert the ccree crypto driver to use crypto_authenc_extractkeys() so
that it picks up the fix for broken validation of rtattr::rta_len.

Fixes: ff27e85a85 ("crypto: ccree - add AEAD support")
Cc: <stable@vger.kernel.org> # v4.17+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2018-12-16 23:23:24 -08:00 коммит произвёл Herbert Xu
Родитель ab57b33525
Коммит dc95b5350a
1 изменённых файлов: 19 добавлений и 21 удалений
Показать статистику Скачать Patch файл Скачать Diff файл Показать все файлы Свернуть все файлы

40
drivers/crypto/ccree/cc_aead.c
Просмотреть файл

@ -549,13 +549,12 @@ static int cc_aead_setkey(struct crypto_aead *tfm, const u8 *key,
unsigned int keylen)
{
struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm);
struct rtattr *rta = (struct rtattr *)key;
struct cc_crypto_req cc_req = {};
struct crypto_authenc_key_param *param;
struct cc_hw_desc desc[MAX_AEAD_SETKEY_SEQ];
int rc = -EINVAL;
unsigned int seq_len = 0;
struct device *dev = drvdata_to_dev(ctx->drvdata);
const u8 *enckey, *authkey;
int rc;
dev_dbg(dev, "Setting key in context @%p for %s. key=%p keylen=%u\n",
ctx, crypto_tfm_alg_name(crypto_aead_tfm(tfm)), key, keylen);
@ -563,35 +562,33 @@ static int cc_aead_setkey(struct crypto_aead *tfm, const u8 *key,
/* STAT_PHASE_0: Init and sanity checks */
if (ctx->auth_mode != DRV_HASH_NULL) { /* authenc() alg. */
if (!RTA_OK(rta, keylen))
struct crypto_authenc_keys keys;
rc = crypto_authenc_extractkeys(&keys, key, keylen);
if (rc)
goto badkey;
if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
goto badkey;
if (RTA_PAYLOAD(rta) < sizeof(*param))
goto badkey;
param = RTA_DATA(rta);
ctx->enc_keylen = be32_to_cpu(param->enckeylen);
key += RTA_ALIGN(rta->rta_len);
keylen -= RTA_ALIGN(rta->rta_len);
if (keylen < ctx->enc_keylen)
goto badkey;
ctx->auth_keylen = keylen - ctx->enc_keylen;
enckey = keys.enckey;
authkey = keys.authkey;
ctx->enc_keylen = keys.enckeylen;
ctx->auth_keylen = keys.authkeylen;
if (ctx->cipher_mode == DRV_CIPHER_CTR) {
/* the nonce is stored in bytes at end of key */
rc = -EINVAL;
if (ctx->enc_keylen <
(AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE))
goto badkey;
/* Copy nonce from last 4 bytes in CTR key to
* first 4 bytes in CTR IV
*/
memcpy(ctx->ctr_nonce, key + ctx->auth_keylen +
ctx->enc_keylen - CTR_RFC3686_NONCE_SIZE,
CTR_RFC3686_NONCE_SIZE);
memcpy(ctx->ctr_nonce, enckey + ctx->enc_keylen -
CTR_RFC3686_NONCE_SIZE, CTR_RFC3686_NONCE_SIZE);
/* Set CTR key size */
ctx->enc_keylen -= CTR_RFC3686_NONCE_SIZE;
}
} else { /* non-authenc - has just one key */
enckey = key;
authkey = NULL;
ctx->enc_keylen = keylen;
ctx->auth_keylen = 0;
}
@ -603,13 +600,14 @@ static int cc_aead_setkey(struct crypto_aead *tfm, const u8 *key,
/* STAT_PHASE_1: Copy key to ctx */
/* Get key material */
memcpy(ctx->enckey, key + ctx->auth_keylen, ctx->enc_keylen);
memcpy(ctx->enckey, enckey, ctx->enc_keylen);
if (ctx->enc_keylen == 24)
memset(ctx->enckey + 24, 0, CC_AES_KEY_SIZE_MAX - 24);
if (ctx->auth_mode == DRV_HASH_XCBC_MAC) {
memcpy(ctx->auth_state.xcbc.xcbc_keys, key, ctx->auth_keylen);
memcpy(ctx->auth_state.xcbc.xcbc_keys, authkey,
ctx->auth_keylen);
} else if (ctx->auth_mode != DRV_HASH_NULL) { /* HMAC */
rc = cc_get_plain_hmac_key(tfm, key, ctx->auth_keylen);
rc = cc_get_plain_hmac_key(tfm, authkey, ctx->auth_keylen);
if (rc)
goto badkey;
}