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tls: expand use of tls_cipher_desc in tls_sw_fallback_init

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tls_sw_fallback_init already gets the key and tag size from
tls_cipher_desc. We can now also check that the cipher type is valid,
and stop hard-coding the algorithm name passed to crypto_alloc_aead.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://lore.kernel.org/r/c8c94b8fcafbfb558e09589c1f1ad48dbdf92f76.1692977948.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Sabrina Dubroca 2023-08-25 23:35:17 +02:00 • committed by Jakub Kicinski
parent d2322cf5ed
commit e907277aeb
1 changed files with 6 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

20
net/tls/tls_device_fallback.c
View file

@ -472,24 +472,14 @@ int tls_sw_fallback_init(struct sock *sk,
struct tls_crypto_info *crypto_info) struct tls_crypto_info *crypto_info)
{ {
const struct tls_cipher_desc *cipher_desc; const struct tls_cipher_desc *cipher_desc;
const u8 *key;
int rc; int rc;
switch (crypto_info->cipher_type) {
case TLS_CIPHER_AES_GCM_128:
key = ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->key;
break;
case TLS_CIPHER_AES_GCM_256:
key = ((struct tls12_crypto_info_aes_gcm_256 *)crypto_info)->key;
break;
default:
rc = -EINVAL;
goto err_out;
}
cipher_desc = get_cipher_desc(crypto_info->cipher_type); cipher_desc = get_cipher_desc(crypto_info->cipher_type);
if (!cipher_desc || !cipher_desc->offloadable)
return -EINVAL;
offload_ctx->aead_send = offload_ctx->aead_send =
crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC); crypto_alloc_aead(cipher_desc->cipher_name, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(offload_ctx->aead_send)) { if (IS_ERR(offload_ctx->aead_send)) {
rc = PTR_ERR(offload_ctx->aead_send); rc = PTR_ERR(offload_ctx->aead_send);
pr_err_ratelimited("crypto_alloc_aead failed rc=%d\n", rc); pr_err_ratelimited("crypto_alloc_aead failed rc=%d\n", rc);
@ -497,7 +487,9 @@ int tls_sw_fallback_init(struct sock *sk,
goto err_out; goto err_out;
} }
rc = crypto_aead_setkey(offload_ctx->aead_send, key, cipher_desc->key); rc = crypto_aead_setkey(offload_ctx->aead_send,
crypto_info_key(crypto_info, cipher_desc),
cipher_desc->key);
if (rc) if (rc)
goto free_aead; goto free_aead;