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tls: validate crypto_info in a separate helper

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Simplify do_tls_setsockopt_conf a bit.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca 2023-10-09 22:50:52 +02:00 committed by David S. Miller
parent 4f48669918
commit 1cf7fbcee6
1 changed files with 27 additions and 24 deletions
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51
net/tls/tls_main.c
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@ -580,6 +580,31 @@ static int tls_getsockopt(struct sock *sk, int level, int optname,
return do_tls_getsockopt(sk, optname, optval, optlen);
}
static int validate_crypto_info(const struct tls_crypto_info *crypto_info,
const struct tls_crypto_info *alt_crypto_info)
{
if (crypto_info->version != TLS_1_2_VERSION &&
crypto_info->version != TLS_1_3_VERSION)
return -EINVAL;
switch (crypto_info->cipher_type) {
case TLS_CIPHER_ARIA_GCM_128:
case TLS_CIPHER_ARIA_GCM_256:
if (crypto_info->version != TLS_1_2_VERSION)
return -EINVAL;
break;
}
/* Ensure that TLS version and ciphers are same in both directions */
if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
if (alt_crypto_info->version != crypto_info->version ||
alt_crypto_info->cipher_type != crypto_info->cipher_type)
return -EINVAL;
}
return 0;
}
static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
unsigned int optlen, int tx)
{
@ -611,21 +636,9 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
goto err_crypto_info;
}
/* check version */
if (crypto_info->version != TLS_1_2_VERSION &&
crypto_info->version != TLS_1_3_VERSION) {
rc = -EINVAL;
rc = validate_crypto_info(crypto_info, alt_crypto_info);
if (rc)
goto err_crypto_info;
}
/* Ensure that TLS version and ciphers are same in both directions */
if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
if (alt_crypto_info->version != crypto_info->version ||
alt_crypto_info->cipher_type != crypto_info->cipher_type) {
rc = -EINVAL;
goto err_crypto_info;
}
}
cipher_desc = get_cipher_desc(crypto_info->cipher_type);
if (!cipher_desc) {
@ -633,16 +646,6 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
goto err_crypto_info;
}
switch (crypto_info->cipher_type) {
case TLS_CIPHER_ARIA_GCM_128:
case TLS_CIPHER_ARIA_GCM_256:
if (crypto_info->version != TLS_1_2_VERSION) {
rc = -EINVAL;
goto err_crypto_info;
}
break;
}
if (optlen != cipher_desc->crypto_info) {
rc = -EINVAL;
goto err_crypto_info;