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Bluetooth: Add support for AES-CMAC hash for security manager device

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The security manager device will require the use of AES-CMAC hash for
out-of-band data generation. This patch makes sure it is correctly
set up and available.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2015-03-16 01:10:21 -07:00 committed by Johan Hedberg
parent f709bfcf6a
commit 6e2dc6d113
1 changed files with 14 additions and 0 deletions
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14
net/bluetooth/smp.c
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@ -75,6 +75,7 @@ enum {
struct smp_dev {
struct crypto_blkcipher *tfm_aes;
struct crypto_hash *tfm_cmac;
};
struct smp_chan {
@ -2936,6 +2937,7 @@ static struct l2cap_chan *smp_add_cid(struct hci_dev *hdev, u16 cid)
struct l2cap_chan *chan;
struct smp_dev *smp;
struct crypto_blkcipher *tfm_aes;
struct crypto_hash *tfm_cmac;
if (cid == L2CAP_CID_SMP_BREDR) {
smp = NULL;
@ -2953,12 +2955,22 @@ static struct l2cap_chan *smp_add_cid(struct hci_dev *hdev, u16 cid)
return ERR_CAST(tfm_aes);
}
tfm_cmac = crypto_alloc_hash("cmac(aes)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm_cmac)) {
BT_ERR("Unable to create CMAC crypto context");
crypto_free_blkcipher(tfm_aes);
kzfree(smp);
return ERR_CAST(tfm_cmac);
}
smp->tfm_aes = tfm_aes;
smp->tfm_cmac = tfm_cmac;
create_chan:
chan = l2cap_chan_create();
if (!chan) {
crypto_free_blkcipher(smp->tfm_aes);
crypto_free_hash(smp->tfm_cmac);
kzfree(smp);
return ERR_PTR(-ENOMEM);
}
@ -3005,6 +3017,8 @@ static void smp_del_chan(struct l2cap_chan *chan)
chan->data = NULL;
if (smp->tfm_aes)
crypto_free_blkcipher(smp->tfm_aes);
if (smp->tfm_cmac)
crypto_free_hash(smp->tfm_cmac);
kzfree(smp);
}