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Diffstat (limited to 'net/bluetooth/smp.c')
-rw-r--r--net/bluetooth/smp.c103
1 files changed, 31 insertions, 72 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 6c2b4e6e87ba..26e8cfad22b8 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -23,6 +23,7 @@
 #include <linux/debugfs.h>
 #include <linux/scatterlist.h>
 #include <linux/crypto.h>
+#include <crypto/aes.h>
 #include <crypto/algapi.h>
 #include <crypto/b128ops.h>
 #include <crypto/hash.h>
@@ -88,7 +89,6 @@ struct smp_dev {
 	u8			local_rand[16];
 	bool			debug_key;
 
-	struct crypto_cipher	*tfm_aes;
 	struct crypto_shash	*tfm_cmac;
 	struct crypto_kpp	*tfm_ecdh;
 };
@@ -127,7 +127,6 @@ struct smp_chan {
 	u8			dhkey[32];
 	u8			mackey[16];
 
-	struct crypto_cipher	*tfm_aes;
 	struct crypto_shash	*tfm_cmac;
 	struct crypto_kpp	*tfm_ecdh;
 };
@@ -377,22 +376,18 @@ static int smp_h7(struct crypto_shash *tfm_cmac, const u8 w[16],
  * s1 and ah.
  */
 
-static int smp_e(struct crypto_cipher *tfm, const u8 *k, u8 *r)
+static int smp_e(const u8 *k, u8 *r)
 {
+	struct crypto_aes_ctx ctx;
 	uint8_t tmp[16], data[16];
 	int err;
 
 	SMP_DBG("k %16phN r %16phN", k, r);
 
-	if (!tfm) {
-		BT_ERR("tfm %p", tfm);
-		return -EINVAL;
-	}
-
 	/* The most significant octet of key corresponds to k[0] */
 	swap_buf(k, tmp, 16);
 
-	err = crypto_cipher_setkey(tfm, tmp, 16);
+	err = aes_expandkey(&ctx, tmp, 16);
 	if (err) {
 		BT_ERR("cipher setkey failed: %d", err);
 		return err;
@@ -401,17 +396,18 @@ static int smp_e(struct crypto_cipher *tfm, const u8 *k, u8 *r)
 	/* Most significant octet of plaintextData corresponds to data[0] */
 	swap_buf(r, data, 16);
 
-	crypto_cipher_encrypt_one(tfm, data, data);
+	aes_encrypt(&ctx, data, data);
 
 	/* Most significant octet of encryptedData corresponds to data[0] */
 	swap_buf(data, r, 16);
 
 	SMP_DBG("r %16phN", r);
 
+	memzero_explicit(&ctx, sizeof (ctx));
 	return err;
 }
 
-static int smp_c1(struct crypto_cipher *tfm_aes, const u8 k[16],
+static int smp_c1(const u8 k[16],
 		  const u8 r[16], const u8 preq[7], const u8 pres[7], u8 _iat,
 		  const bdaddr_t *ia, u8 _rat, const bdaddr_t *ra, u8 res[16])
 {
@@ -436,7 +432,7 @@ static int smp_c1(struct crypto_cipher *tfm_aes, const u8 k[16],
 	u128_xor((u128 *) res, (u128 *) r, (u128 *) p1);
 
 	/* res = e(k, res) */
-	err = smp_e(tfm_aes, k, res);
+	err = smp_e(k, res);
 	if (err) {
 		BT_ERR("Encrypt data error");
 		return err;
@@ -453,14 +449,14 @@ static int smp_c1(struct crypto_cipher *tfm_aes, const u8 k[16],
 	u128_xor((u128 *) res, (u128 *) res, (u128 *) p2);
 
 	/* res = e(k, res) */
-	err = smp_e(tfm_aes, k, res);
+	err = smp_e(k, res);
 	if (err)
 		BT_ERR("Encrypt data error");
 
 	return err;
 }
 
-static int smp_s1(struct crypto_cipher *tfm_aes, const u8 k[16],
+static int smp_s1(const u8 k[16],
 		  const u8 r1[16], const u8 r2[16], u8 _r[16])
 {
 	int err;
@@ -469,15 +465,14 @@ static int smp_s1(struct crypto_cipher *tfm_aes, const u8 k[16],
 	memcpy(_r, r2, 8);
 	memcpy(_r + 8, r1, 8);
 
-	err = smp_e(tfm_aes, k, _r);
+	err = smp_e(k, _r);
 	if (err)
 		BT_ERR("Encrypt data error");
 
 	return err;
 }
 
-static int smp_ah(struct crypto_cipher *tfm, const u8 irk[16],
-		  const u8 r[3], u8 res[3])
+static int smp_ah(const u8 irk[16], const u8 r[3], u8 res[3])
 {
 	u8 _res[16];
 	int err;
@@ -486,7 +481,7 @@ static int smp_ah(struct crypto_cipher *tfm, const u8 irk[16],
 	memcpy(_res, r, 3);
 	memset(_res + 3, 0, 13);
 
-	err = smp_e(tfm, irk, _res);
+	err = smp_e(irk, _res);
 	if (err) {
 		BT_ERR("Encrypt error");
 		return err;
@@ -518,7 +513,7 @@ bool smp_irk_matches(struct hci_dev *hdev, const u8 irk[16],
 
 	BT_DBG("RPA %pMR IRK %*phN", bdaddr, 16, irk);
 
-	err = smp_ah(smp->tfm_aes, irk, &bdaddr->b[3], hash);
+	err = smp_ah(irk, &bdaddr->b[3], hash);
 	if (err)
 		return false;
 
@@ -541,7 +536,7 @@ int smp_generate_rpa(struct hci_dev *hdev, const u8 irk[16], bdaddr_t *rpa)
 	rpa->b[5] &= 0x3f;	/* Clear two most significant bits */
 	rpa->b[5] |= 0x40;	/* Set second most significant bit */
 
-	err = smp_ah(smp->tfm_aes, irk, &rpa->b[3], rpa->b);
+	err = smp_ah(irk, &rpa->b[3], rpa->b);
 	if (err < 0)
 		return err;
 
@@ -768,7 +763,6 @@ static void smp_chan_destroy(struct l2cap_conn *conn)
 	kzfree(smp->slave_csrk);
 	kzfree(smp->link_key);
 
-	crypto_free_cipher(smp->tfm_aes);
 	crypto_free_shash(smp->tfm_cmac);
 	crypto_free_kpp(smp->tfm_ecdh);
 
@@ -957,7 +951,7 @@ static u8 smp_confirm(struct smp_chan *smp)
 
 	BT_DBG("conn %p", conn);
 
-	ret = smp_c1(smp->tfm_aes, smp->tk, smp->prnd, smp->preq, smp->prsp,
+	ret = smp_c1(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,
 		     cp.confirm_val);
@@ -983,12 +977,9 @@ static u8 smp_random(struct smp_chan *smp)
 	u8 confirm[16];
 	int ret;
 
-	if (IS_ERR_OR_NULL(smp->tfm_aes))
-		return SMP_UNSPECIFIED;
-
 	BT_DBG("conn %p %s", conn, conn->hcon->out ? "master" : "slave");
 
-	ret = smp_c1(smp->tfm_aes, smp->tk, smp->rrnd, smp->preq, smp->prsp,
+	ret = smp_c1(smp->tk, smp->rrnd, smp->preq, smp->prsp,
 		     hcon->init_addr_type, &hcon->init_addr,
 		     hcon->resp_addr_type, &hcon->resp_addr, confirm);
 	if (ret)
@@ -1005,7 +996,7 @@ static u8 smp_random(struct smp_chan *smp)
 		__le64 rand = 0;
 		__le16 ediv = 0;
 
-		smp_s1(smp->tfm_aes, smp->tk, smp->rrnd, smp->prnd, stk);
+		smp_s1(smp->tk, smp->rrnd, smp->prnd, stk);
 
 		if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->flags))
 			return SMP_UNSPECIFIED;
@@ -1021,7 +1012,7 @@ static u8 smp_random(struct smp_chan *smp)
 		smp_send_cmd(conn, SMP_CMD_PAIRING_RANDOM, sizeof(smp->prnd),
 			     smp->prnd);
 
-		smp_s1(smp->tfm_aes, smp->tk, smp->prnd, smp->rrnd, stk);
+		smp_s1(smp->tk, smp->prnd, smp->rrnd, stk);
 
 		if (hcon->pending_sec_level == BT_SECURITY_HIGH)
 			auth = 1;
@@ -1389,16 +1380,10 @@ static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)
 	if (!smp)
 		return NULL;
 
-	smp->tfm_aes = crypto_alloc_cipher("aes", 0, 0);
-	if (IS_ERR(smp->tfm_aes)) {
-		BT_ERR("Unable to create AES crypto context");
-		goto zfree_smp;
-	}
-
 	smp->tfm_cmac = crypto_alloc_shash("cmac(aes)", 0, 0);
 	if (IS_ERR(smp->tfm_cmac)) {
 		BT_ERR("Unable to create CMAC crypto context");
-		goto free_cipher;
+		goto zfree_smp;
 	}
 
 	smp->tfm_ecdh = crypto_alloc_kpp("ecdh", CRYPTO_ALG_INTERNAL, 0);
@@ -1420,8 +1405,6 @@ static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)
 
 free_shash:
 	crypto_free_shash(smp->tfm_cmac);
-free_cipher:
-	crypto_free_cipher(smp->tfm_aes);
 zfree_smp:
 	kzfree(smp);
 	return NULL;
@@ -3232,7 +3215,6 @@ static struct l2cap_chan *smp_add_cid(struct hci_dev *hdev, u16 cid)
 {
 	struct l2cap_chan *chan;
 	struct smp_dev *smp;
-	struct crypto_cipher *tfm_aes;
 	struct crypto_shash *tfm_cmac;
 	struct crypto_kpp *tfm_ecdh;
 
@@ -3245,17 +3227,9 @@ static struct l2cap_chan *smp_add_cid(struct hci_dev *hdev, u16 cid)
 	if (!smp)
 		return ERR_PTR(-ENOMEM);
 
-	tfm_aes = crypto_alloc_cipher("aes", 0, 0);
-	if (IS_ERR(tfm_aes)) {
-		BT_ERR("Unable to create AES crypto context");
-		kzfree(smp);
-		return ERR_CAST(tfm_aes);
-	}
-
 	tfm_cmac = crypto_alloc_shash("cmac(aes)", 0, 0);
 	if (IS_ERR(tfm_cmac)) {
 		BT_ERR("Unable to create CMAC crypto context");
-		crypto_free_cipher(tfm_aes);
 		kzfree(smp);
 		return ERR_CAST(tfm_cmac);
 	}
@@ -3264,13 +3238,11 @@ static struct l2cap_chan *smp_add_cid(struct hci_dev *hdev, u16 cid)
 	if (IS_ERR(tfm_ecdh)) {
 		BT_ERR("Unable to create ECDH crypto context");
 		crypto_free_shash(tfm_cmac);
-		crypto_free_cipher(tfm_aes);
 		kzfree(smp);
 		return ERR_CAST(tfm_ecdh);
 	}
 
 	smp->local_oob = false;
-	smp->tfm_aes = tfm_aes;
 	smp->tfm_cmac = tfm_cmac;
 	smp->tfm_ecdh = tfm_ecdh;
 
@@ -3278,7 +3250,6 @@ create_chan:
 	chan = l2cap_chan_create();
 	if (!chan) {
 		if (smp) {
-			crypto_free_cipher(smp->tfm_aes);
 			crypto_free_shash(smp->tfm_cmac);
 			crypto_free_kpp(smp->tfm_ecdh);
 			kzfree(smp);
@@ -3326,7 +3297,6 @@ static void smp_del_chan(struct l2cap_chan *chan)
 	smp = chan->data;
 	if (smp) {
 		chan->data = NULL;
-		crypto_free_cipher(smp->tfm_aes);
 		crypto_free_shash(smp->tfm_cmac);
 		crypto_free_kpp(smp->tfm_ecdh);
 		kzfree(smp);
@@ -3582,7 +3552,7 @@ static int __init test_debug_key(struct crypto_kpp *tfm_ecdh)
 	return 0;
 }
 
-static int __init test_ah(struct crypto_cipher *tfm_aes)
+static int __init test_ah(void)
 {
 	const u8 irk[16] = {
 			0x9b, 0x7d, 0x39, 0x0a, 0xa6, 0x10, 0x10, 0x34,
@@ -3592,7 +3562,7 @@ static int __init test_ah(struct crypto_cipher *tfm_aes)
 	u8 res[3];
 	int err;
 
-	err = smp_ah(tfm_aes, irk, r, res);
+	err = smp_ah(irk, r, res);
 	if (err)
 		return err;
 
@@ -3602,7 +3572,7 @@ static int __init test_ah(struct crypto_cipher *tfm_aes)
 	return 0;
 }
 
-static int __init test_c1(struct crypto_cipher *tfm_aes)
+static int __init test_c1(void)
 {
 	const u8 k[16] = {
 			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -3622,7 +3592,7 @@ static int __init test_c1(struct crypto_cipher *tfm_aes)
 	u8 res[16];
 	int err;
 
-	err = smp_c1(tfm_aes, k, r, preq, pres, _iat, &ia, _rat, &ra, res);
+	err = smp_c1(k, r, preq, pres, _iat, &ia, _rat, &ra, res);
 	if (err)
 		return err;
 
@@ -3632,7 +3602,7 @@ static int __init test_c1(struct crypto_cipher *tfm_aes)
 	return 0;
 }
 
-static int __init test_s1(struct crypto_cipher *tfm_aes)
+static int __init test_s1(void)
 {
 	const u8 k[16] = {
 			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -3647,7 +3617,7 @@ static int __init test_s1(struct crypto_cipher *tfm_aes)
 	u8 res[16];
 	int err;
 
-	err = smp_s1(tfm_aes, k, r1, r2, res);
+	err = smp_s1(k, r1, r2, res);
 	if (err)
 		return err;
 
@@ -3828,8 +3798,7 @@ static const struct file_operations test_smp_fops = {
 	.llseek		= default_llseek,
 };
 
-static int __init run_selftests(struct crypto_cipher *tfm_aes,
-				struct crypto_shash *tfm_cmac,
+static int __init run_selftests(struct crypto_shash *tfm_cmac,
 				struct crypto_kpp *tfm_ecdh)
 {
 	ktime_t calltime, delta, rettime;
@@ -3844,19 +3813,19 @@ static int __init run_selftests(struct crypto_cipher *tfm_aes,
 		goto done;
 	}
 
-	err = test_ah(tfm_aes);
+	err = test_ah();
 	if (err) {
 		BT_ERR("smp_ah test failed");
 		goto done;
 	}
 
-	err = test_c1(tfm_aes);
+	err = test_c1();
 	if (err) {
 		BT_ERR("smp_c1 test failed");
 		goto done;
 	}
 
-	err = test_s1(tfm_aes);
+	err = test_s1();
 	if (err) {
 		BT_ERR("smp_s1 test failed");
 		goto done;
@@ -3913,21 +3882,13 @@ done:
 
 int __init bt_selftest_smp(void)
 {
-	struct crypto_cipher *tfm_aes;
 	struct crypto_shash *tfm_cmac;
 	struct crypto_kpp *tfm_ecdh;
 	int err;
 
-	tfm_aes = crypto_alloc_cipher("aes", 0, 0);
-	if (IS_ERR(tfm_aes)) {
-		BT_ERR("Unable to create AES crypto context");
-		return PTR_ERR(tfm_aes);
-	}
-
 	tfm_cmac = crypto_alloc_shash("cmac(aes)", 0, 0);
 	if (IS_ERR(tfm_cmac)) {
 		BT_ERR("Unable to create CMAC crypto context");
-		crypto_free_cipher(tfm_aes);
 		return PTR_ERR(tfm_cmac);
 	}
 
@@ -3935,14 +3896,12 @@ int __init bt_selftest_smp(void)
 	if (IS_ERR(tfm_ecdh)) {
 		BT_ERR("Unable to create ECDH crypto context");
 		crypto_free_shash(tfm_cmac);
-		crypto_free_cipher(tfm_aes);
 		return PTR_ERR(tfm_ecdh);
 	}
 
-	err = run_selftests(tfm_aes, tfm_cmac, tfm_ecdh);
+	err = run_selftests(tfm_cmac, tfm_ecdh);
 
 	crypto_free_shash(tfm_cmac);
-	crypto_free_cipher(tfm_aes);
 	crypto_free_kpp(tfm_ecdh);
 
 	return err;
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-10-06 13:36:15 +0000