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| author | Johan Hedberg <johan.hedberg@intel.com> | 2014-05-02 14:19:47 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-12-03 16:51:16 +0100 |
| commit | 407cecf6c71e13da04f6b591bdbec76ab9a251c2 (patch) | |
| tree | 84ea05ef859c33cfd6cc3827851b555168db7e0b /net | |
| parent | df8e1a4c7339f6447e75430e7c8172deddb489a9 (diff) | |
| download | linux-407cecf6c71e13da04f6b591bdbec76ab9a251c2.tar.gz | |
Bluetooth: Add basic support for AES-CMAC
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bluetooth/Kconfig | 1 | ||||
| -rw-r--r-- | net/bluetooth/smp.c | 10 |
2 files changed, 11 insertions, 0 deletions
diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig index 5e97a8ff850b..29bcafc41adf 100644 --- a/net/bluetooth/Kconfig +++ b/net/bluetooth/Kconfig @@ -10,6 +10,7 @@ menuconfig BT select CRYPTO select CRYPTO_BLKCIPHER select CRYPTO_AES + select CRYPTO_CMAC select CRYPTO_ECB select CRYPTO_SHA256 help diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index d993d7d4fcc8..4fed367da380 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -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; |