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Commit 011c391a authored by Johan Hedberg's avatar Johan Hedberg Committed by Marcel Holtmann
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Bluetooth: Add debug logs for legacy SMP crypto functions 



To help debug legacy SMP crypto functions add debug logs of the
various values involved.

Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 73e85ed3

net/bluetooth/smp.c

+16 −4
Original line number Diff line number Diff line
@@ -371,6 +371,8 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r) 
	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;
@@ -400,6 +402,8 @@ static int smp_e(struct crypto_blkcipher *tfm, const u8 *k, u8 *r) 
	/* Most significant octet of encryptedData corresponds to data[0] */

	swap_buf(data, r, 16);



	SMP_DBG("r %16phN", r);



	return err;

}
@@ -410,6 +414,10 @@ static int smp_c1(struct crypto_blkcipher *tfm_aes, const u8 k[16], 
	u8 p1[16], p2[16];

	int err;



	SMP_DBG("k %16phN r %16phN", k, r);

	SMP_DBG("iat %u ia %6phN rat %u ra %6phN", _iat, ia, _rat, ra);

	SMP_DBG("preq %7phN pres %7phN", preq, pres);



	memset(p1, 0, 16);



	/* p1 = pres || preq || _rat || _iat */
@@ -418,10 +426,7 @@ static int smp_c1(struct crypto_blkcipher *tfm_aes, const u8 k[16], 
	memcpy(p1 + 2, preq, 7);

	memcpy(p1 + 9, pres, 7);



	/* p2 = padding || ia || ra */

	memcpy(p2, ra, 6);

	memcpy(p2 + 6, ia, 6);

	memset(p2 + 12, 0, 4);

	SMP_DBG("p1 %16phN", p1);



	/* res = r XOR p1 */

	u128_xor((u128 *) res, (u128 *) r, (u128 *) p1);
@@ -433,6 +438,13 @@ static int smp_c1(struct crypto_blkcipher *tfm_aes, const u8 k[16], 
		return err;

	}



	/* p2 = padding || ia || ra */

	memcpy(p2, ra, 6);

	memcpy(p2 + 6, ia, 6);

	memset(p2 + 12, 0, 4);



	SMP_DBG("p2 %16phN", p2);



	/* res = res XOR p2 */

	u128_xor((u128 *) res, (u128 *) res, (u128 *) p2);