diff options
| author | Sabrina Dubroca <sd@queasysnail.net> | 2023-08-26 00:35:15 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-08-28 03:17:41 +0300 |
| commit | 3524dd4d5f1fb9e75fdfaf280822a34fa82059bd (patch) | |
| tree | f1a92f9b5508023b0490c5820fb192d849f8fd5a | |
| parent | 0d98cc02022d60004f78f6e7e6cc1bd39db80ef9 (diff) | |
| download | linux-3524dd4d5f1fb9e75fdfaf280822a34fa82059bd.tar.xz | |
tls: expand use of tls_cipher_desc in tls_set_device_offload
tls_set_device_offload is already getting iv and rec_seq sizes from
tls_cipher_desc. We can now also check if the cipher_type coming from
userspace is valid and can be offloaded.
We can also remove the runtime check on rec_seq, since we validate it
at compile time.
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://lore.kernel.org/r/8ab71b8eca856c7aaf981a45fe91ac649eb0e2e9.1692977948.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/tls/tls_device.c | 22 |
1 files changed, 4 insertions, 18 deletions
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c index 98885d872d4c..8c94c926606a 100644 --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -1079,29 +1079,15 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx) goto release_netdev; } - switch (crypto_info->cipher_type) { - case TLS_CIPHER_AES_GCM_128: - iv = ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->iv; - rec_seq = - ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->rec_seq; - break; - case TLS_CIPHER_AES_GCM_256: - iv = ((struct tls12_crypto_info_aes_gcm_256 *)crypto_info)->iv; - rec_seq = - ((struct tls12_crypto_info_aes_gcm_256 *)crypto_info)->rec_seq; - break; - default: - rc = -EINVAL; - goto release_netdev; - } cipher_desc = get_cipher_desc(crypto_info->cipher_type); - - /* Sanity-check the rec_seq_size for stack allocations */ - if (cipher_desc->rec_seq > TLS_MAX_REC_SEQ_SIZE) { + if (!cipher_desc || !cipher_desc->offloadable) { rc = -EINVAL; goto release_netdev; } + iv = crypto_info_iv(crypto_info, cipher_desc); + rec_seq = crypto_info_rec_seq(crypto_info, cipher_desc); + prot->version = crypto_info->version; prot->cipher_type = crypto_info->cipher_type; prot->prepend_size = TLS_HEADER_SIZE + cipher_desc->iv; |