FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-18 15:09:53 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Bluetooth: Add basic support for AES-CMAC

Browse Source 
Most of the LE Secure Connections SMP crypto functions build on top of
the AES-CMAC function. This patch adds access to AES-CMAC in the kernel
crypto subsystem by allocating a crypto_hash handle for it in a similar
way that we have one for AES-CBC.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-05-02 14:19:47 +03:00 committed by Marcel Holtmann
parent df8e1a4c73
commit 407cecf6c7
2 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/bluetooth/Kconfig
View File

@ -10,6 +10,7 @@ menuconfig BT
select CRYPTO
select CRYPTO_BLKCIPHER
select CRYPTO_AES
select CRYPTO_CMAC
select CRYPTO_ECB
select CRYPTO_SHA256
help

10
net/bluetooth/smp.c
View File

@ -72,6 +72,7 @@ struct smp_chan {
unsigned long flags;
struct crypto_blkcipher *tfm_aes;
struct crypto_hash *tfm_cmac;
};
static inline void swap_buf(const u8 *src, u8 *dst, size_t len)
@ -396,6 +397,7 @@ static void smp_chan_destroy(struct l2cap_conn *conn)
kfree(smp->slave_csrk);
crypto_free_blkcipher(smp->tfm_aes);
crypto_free_hash(smp->tfm_cmac);
/* If pairing failed clean up any keys we might have */
if (!complete) {
@ -861,6 +863,14 @@ static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)
return NULL;
}
smp->tfm_cmac = crypto_alloc_hash("cmac(aes)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(smp->tfm_cmac)) {
BT_ERR("Unable to create CMAC crypto context");
crypto_free_blkcipher(smp->tfm_aes);
kfree(smp);
return NULL;
}
smp->conn = conn;
chan->data = smp;