[PATCH BlueZ v2 3/6] advtest: Use bt_crypto_rsi to generate RSI

[Luiz Augusto von Dentz <luiz.dentz@gmail.com>]

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This makes use of bt_crypto_rsi to generate a valid RSI.
---
 tools/advtest.c | 29 ++---------------------------
 1 file changed, 2 insertions(+), 27 deletions(-)

diff --git a/tools/advtest.c b/tools/advtest.c
index 8df6923d2f2e..706b2503b74c 100644
--- a/tools/advtest.c
+++ b/tools/advtest.c
@@ -75,37 +75,13 @@ static size_t hex2bin(const char *hexstr, uint8_t *buf, size_t buflen)
 	return len;
 }
 
-static bool get_random_bytes(void *buf, size_t num_bytes)
-{
-	ssize_t len;
-	int fd;
-
-	fd = open("/dev/urandom", O_RDONLY);
-	if (fd < 0)
-		return false;
-
-	len = read(fd, buf, num_bytes);
-
-	close(fd);
-
-	if (len < 0)
-		return false;
-
-	return true;
-}
-
 static void generate_rsi(char *val)
 {
-	uint8_t sirk[16], hash[3];
+	uint8_t sirk[16];
 	uint8_t  rsi[6] = {0};
 
 	hex2bin(val, sirk, sizeof(sirk));
 
-	get_random_bytes(&rsi[3], 3);
-
-	rsi[5] &= 0x3f; /* Clear 2 msb */
-	rsi[5] |= 0x40; /* Set 2nd msb */
-
 	crypto = bt_crypto_new();
 	if (!crypto) {
 		fprintf(stderr, "Failed to open crypto interface\n");
@@ -113,8 +89,7 @@ static void generate_rsi(char *val)
 		return;
 	}
 
-	bt_crypto_ah(crypto, sirk, rsi + 3, hash);
-	memcpy(rsi, hash, 3);
+	bt_crypto_rsi(crypto, sirk, rsi);
 
 	print_rpa(rsi);
 }
-- 
2.52.0