diff options
| author |   Sabrina Dubroca <sd@queasysnail.net> | 2018-09-12 17:44:42 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-09-13 12:03:47 -0700 |
| commit | 86029d10af18381814881d6cce2dd6872163b59f (patch) | |
| tree | ca14c5fa1d55c1b5833e225571ed0aee777715cb /include/net/tls.h | |
| parent | tls: don't copy the key out of tls12_crypto_info_aes_gcm_128 (diff) | |
| download | linux-dev-86029d10af18381814881d6cce2dd6872163b59f.tar.xz linux-dev-86029d10af18381814881d6cce2dd6872163b59f.zip | |
tls: zero the crypto information from tls_context before freeing
This contains key material in crypto_send_aes_gcm_128 and
crypto_recv_aes_gcm_128.
Introduce union tls_crypto_context, and replace the two identical
unions directly embedded in struct tls_context with it. We can then
use this union to clean up the memory in the new tls_ctx_free()
function.
Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tls.h')
| -rw-r--r-- | include/net/tls.h | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/include/net/tls.h b/include/net/tls.h index d5c683e8bb22..0a769cf2f5f3 100644 --- a/include/net/tls.h +++ b/include/net/tls.h @@ -171,15 +171,14 @@ struct cipher_context { char *rec_seq; }; +union tls_crypto_context { + struct tls_crypto_info info; + struct tls12_crypto_info_aes_gcm_128 aes_gcm_128; +}; + struct tls_context { - union { - struct tls_crypto_info crypto_send; - struct tls12_crypto_info_aes_gcm_128 crypto_send_aes_gcm_128; - }; - union { - struct tls_crypto_info crypto_recv; - struct tls12_crypto_info_aes_gcm_128 crypto_recv_aes_gcm_128; - }; + union tls_crypto_context crypto_send; + union tls_crypto_context crypto_recv; struct list_head list; struct net_device *netdev; @@ -367,8 +366,8 @@ static inline void tls_fill_prepend(struct tls_context *ctx, * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE */ buf[0] = record_type; - buf[1] = TLS_VERSION_MINOR(ctx->crypto_send.version); - buf[2] = TLS_VERSION_MAJOR(ctx->crypto_send.version); + buf[1] = TLS_VERSION_MINOR(ctx->crypto_send.info.version); + buf[2] = TLS_VERSION_MAJOR(ctx->crypto_send.info.version); /* we can use IV for nonce explicit according to spec */ buf[3] = pkt_len >> 8; buf[4] = pkt_len & 0xFF; |