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-rw-r--r--net/bluetooth/smp.c101
1 files changed, 46 insertions, 55 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 4f3cde9dd1ea..6f29430c29c4 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -53,6 +53,7 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r)
{
struct blkcipher_desc desc;
struct scatterlist sg;
+ uint8_t tmp[16], data[16];
int err;
if (tfm == NULL) {
@@ -63,34 +64,40 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r)
desc.tfm = tfm;
desc.flags = 0;
- err = crypto_blkcipher_setkey(tfm, k, 16);
+ /* The most significant octet of key corresponds to k[0] */
+ swap128(k, tmp);
+
+ err = crypto_blkcipher_setkey(tfm, tmp, 16);
if (err) {
BT_ERR("cipher setkey failed: %d", err);
return err;
}
- sg_init_one(&sg, r, 16);
+ /* Most significant octet of plaintextData corresponds to data[0] */
+ swap128(r, data);
+
+ sg_init_one(&sg, data, 16);
err = crypto_blkcipher_encrypt(&desc, &sg, &sg, 16);
if (err)
BT_ERR("Encrypt data error %d", err);
+ /* Most significant octet of encryptedData corresponds to data[0] */
+ swap128(data, r);
+
return err;
}
static int smp_ah(struct crypto_blkcipher *tfm, u8 irk[16], u8 r[3], u8 res[3])
{
- u8 _res[16], k[16];
+ u8 _res[16];
int err;
/* r' = padding || r */
- memset(_res, 0, 13);
- _res[13] = r[2];
- _res[14] = r[1];
- _res[15] = r[0];
+ memcpy(_res, r, 3);
+ memset(_res + 3, 0, 13);
- swap128(irk, k);
- err = smp_e(tfm, k, _res);
+ err = smp_e(tfm, irk, _res);
if (err) {
BT_ERR("Encrypt error");
return err;
@@ -102,9 +109,7 @@ static int smp_ah(struct crypto_blkcipher *tfm, u8 irk[16], u8 r[3], u8 res[3])
* by taking the least significant 24 bits of the output of e as the
* result of ah.
*/
- res[0] = _res[15];
- res[1] = _res[14];
- res[2] = _res[13];
+ memcpy(res, _res, 3);
return 0;
}
@@ -152,16 +157,15 @@ static int smp_c1(struct crypto_blkcipher *tfm, u8 k[16], u8 r[16],
memset(p1, 0, 16);
/* p1 = pres || preq || _rat || _iat */
- swap56(pres, p1);
- swap56(preq, p1 + 7);
- p1[14] = _rat;
- p1[15] = _iat;
-
- memset(p2, 0, 16);
+ p1[0] = _iat;
+ p1[1] = _rat;
+ memcpy(p1 + 2, preq, 7);
+ memcpy(p1 + 9, pres, 7);
/* p2 = padding || ia || ra */
- baswap((bdaddr_t *) (p2 + 4), ia);
- baswap((bdaddr_t *) (p2 + 10), ra);
+ memcpy(p2, ra, 6);
+ memcpy(p2 + 6, ia, 6);
+ memset(p2 + 12, 0, 4);
/* res = r XOR p1 */
u128_xor((u128 *) res, (u128 *) r, (u128 *) p1);
@@ -190,8 +194,8 @@ static int smp_s1(struct crypto_blkcipher *tfm, u8 k[16], u8 r1[16],
int err;
/* Just least significant octets from r1 and r2 are considered */
- memcpy(_r, r1 + 8, 8);
- memcpy(_r + 8, r2 + 8, 8);
+ memcpy(_r, r2, 8);
+ memcpy(_r + 8, r1, 8);
err = smp_e(tfm, k, _r);
if (err)
@@ -405,13 +409,10 @@ static int tk_request(struct l2cap_conn *conn, u8 remote_oob, u8 auth,
/* Generate random passkey. Not valid until confirmed. */
if (method == CFM_PASSKEY) {
- u8 key[16];
-
- memset(key, 0, sizeof(key));
+ memset(smp->tk, 0, sizeof(smp->tk));
get_random_bytes(&passkey, sizeof(passkey));
passkey %= 1000000;
- put_unaligned_le32(passkey, key);
- swap128(key, smp->tk);
+ put_unaligned_le32(passkey, smp->tk);
BT_DBG("PassKey: %d", passkey);
}
@@ -438,7 +439,7 @@ static void confirm_work(struct work_struct *work)
struct crypto_blkcipher *tfm = hdev->tfm_aes;
struct smp_cmd_pairing_confirm cp;
int ret;
- u8 res[16], reason;
+ u8 reason;
BT_DBG("conn %p", conn);
@@ -447,7 +448,8 @@ static void confirm_work(struct work_struct *work)
ret = smp_c1(tfm, smp->tk, smp->prnd, smp->preq, smp->prsp,
conn->hcon->init_addr_type, &conn->hcon->init_addr,
- conn->hcon->resp_addr_type, &conn->hcon->resp_addr, res);
+ conn->hcon->resp_addr_type, &conn->hcon->resp_addr,
+ cp.confirm_val);
hci_dev_unlock(hdev);
@@ -458,7 +460,6 @@ static void confirm_work(struct work_struct *work)
clear_bit(SMP_FLAG_CFM_PENDING, &smp->smp_flags);
- swap128(res, cp.confirm_val);
smp_send_cmd(smp->conn, SMP_CMD_PAIRING_CONFIRM, sizeof(cp), &cp);
return;
@@ -474,7 +475,7 @@ static void random_work(struct work_struct *work)
struct hci_conn *hcon = conn->hcon;
struct hci_dev *hdev = hcon->hdev;
struct crypto_blkcipher *tfm = hdev->tfm_aes;
- u8 reason, confirm[16], res[16], key[16];
+ u8 reason, confirm[16];
int ret;
if (IS_ERR_OR_NULL(tfm)) {
@@ -489,7 +490,7 @@ static void random_work(struct work_struct *work)
ret = smp_c1(tfm, smp->tk, smp->rrnd, smp->preq, smp->prsp,
hcon->init_addr_type, &hcon->init_addr,
- hcon->resp_addr_type, &hcon->resp_addr, res);
+ hcon->resp_addr_type, &hcon->resp_addr, confirm);
hci_dev_unlock(hdev);
@@ -498,8 +499,6 @@ static void random_work(struct work_struct *work)
goto error;
}
- swap128(res, confirm);
-
if (memcmp(smp->pcnf, confirm, sizeof(smp->pcnf)) != 0) {
BT_ERR("Pairing failed (confirmation values mismatch)");
reason = SMP_CONFIRM_FAILED;
@@ -511,8 +510,7 @@ static void random_work(struct work_struct *work)
__le64 rand = 0;
__le16 ediv = 0;
- smp_s1(tfm, smp->tk, smp->rrnd, smp->prnd, key);
- swap128(key, stk);
+ smp_s1(tfm, smp->tk, smp->rrnd, smp->prnd, stk);
memset(stk + smp->enc_key_size, 0,
SMP_MAX_ENC_KEY_SIZE - smp->enc_key_size);
@@ -525,15 +523,14 @@ static void random_work(struct work_struct *work)
hci_le_start_enc(hcon, ediv, rand, stk);
hcon->enc_key_size = smp->enc_key_size;
} else {
- u8 stk[16], r[16];
+ u8 stk[16];
__le64 rand = 0;
__le16 ediv = 0;
- swap128(smp->prnd, r);
- smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(r), r);
+ smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(smp->prnd),
+ smp->prnd);
- smp_s1(tfm, smp->tk, smp->prnd, smp->rrnd, key);
- swap128(key, stk);
+ smp_s1(tfm, smp->tk, smp->prnd, smp->rrnd, stk);
memset(stk + smp->enc_key_size, 0,
SMP_MAX_ENC_KEY_SIZE - smp->enc_key_size);
@@ -628,7 +625,6 @@ int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey)
struct l2cap_conn *conn = hcon->smp_conn;
struct smp_chan *smp;
u32 value;
- u8 key[16];
BT_DBG("");
@@ -640,10 +636,9 @@ int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey)
switch (mgmt_op) {
case MGMT_OP_USER_PASSKEY_REPLY:
value = le32_to_cpu(passkey);
- memset(key, 0, sizeof(key));
+ memset(smp->tk, 0, sizeof(smp->tk));
BT_DBG("PassKey: %d", value);
- put_unaligned_le32(value, key);
- swap128(key, smp->tk);
+ put_unaligned_le32(value, smp->tk);
/* Fall Through */
case MGMT_OP_USER_CONFIRM_REPLY:
set_bit(SMP_FLAG_TK_VALID, &smp->smp_flags);
@@ -787,17 +782,13 @@ static u8 smp_cmd_pairing_confirm(struct l2cap_conn *conn, struct sk_buff *skb)
memcpy(smp->pcnf, skb->data, sizeof(smp->pcnf));
skb_pull(skb, sizeof(smp->pcnf));
- if (conn->hcon->out) {
- u8 random[16];
-
- swap128(smp->prnd, random);
- smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(random),
- random);
- } else if (test_bit(SMP_FLAG_TK_VALID, &smp->smp_flags)) {
+ if (conn->hcon->out)
+ smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(smp->prnd),
+ smp->prnd);
+ else if (test_bit(SMP_FLAG_TK_VALID, &smp->smp_flags))
queue_work(hdev->workqueue, &smp->confirm);
- } else {
+ else
set_bit(SMP_FLAG_CFM_PENDING, &smp->smp_flags);
- }
return 0;
}
@@ -812,7 +803,7 @@ static u8 smp_cmd_pairing_random(struct l2cap_conn *conn, struct sk_buff *skb)
if (skb->len < sizeof(smp->rrnd))
return SMP_UNSPECIFIED;
- swap128(skb->data, smp->rrnd);
+ memcpy(smp->rrnd, skb->data, sizeof(smp->rrnd));
skb_pull(skb, sizeof(smp->rrnd));
queue_work(hdev->workqueue, &smp->random);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-09 05:30:39 +0000