diff options
| -rw-r--r-- | tools/advtest.c | 80 |
1 files changed, 78 insertions, 2 deletions
diff --git a/tools/advtest.c b/tools/advtest.c index de036e783..9ef69ed51 100644 --- a/tools/advtest.c +++ b/tools/advtest.c @@ -13,6 +13,13 @@ #include <config.h> #endif +#include <stdlib.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> + #include <getopt.h> #include "lib/bluetooth.h" @@ -32,6 +39,9 @@ "\xe1\x23\x99\xc1\xca\x9a\xc3\x31" #define SCAN_IRK "\xfa\x73\x09\x11\x3f\x03\x37\x0f" \ "\xf4\xf9\x93\x1e\xf9\xa3\x63\xa6" +#ifndef MIN +#define MIN(x, y) ((x) < (y) ? (x) : (y)) +#endif static struct mgmt *mgmt; static uint16_t index1 = MGMT_INDEX_NONE; @@ -43,13 +53,73 @@ static struct bt_hci *scan_dev; static void print_rpa(const uint8_t addr[6]) { - printf(" Address: %02x:%02x:%02x:%02x:%02x:%02x\n", + printf(" RSI:\t0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n", addr[5], addr[4], addr[3], addr[2], addr[1], addr[0]); printf(" Random: %02x%02x%02x\n", addr[3], addr[4], addr[5]); printf(" Hash: %02x%02x%02x\n", addr[0], addr[1], addr[2]); } +static size_t hex2bin(const char *hexstr, uint8_t *buf, size_t buflen) +{ + size_t i, len; + + len = MIN((strlen(hexstr) / 2), buflen); + memset(buf, 0, len); + + for (i = 0; i < len; i++) + if (sscanf(hexstr + (i * 2), "%02hhX", &buf[i]) != 1) + continue; + + + 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 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"); + mainloop_exit_failure(); + return; + } + + bt_crypto_ah(crypto, sirk, rsi + 3, hash); + memcpy(rsi, hash, 3); + + print_rpa(rsi); +} + + static void scan_le_adv_report(const void *data, uint8_t size, void *user_data) { @@ -351,9 +421,11 @@ static void usage(void) printf("\tadvtest [options]\n"); printf("options:\n" "\t-h, --help Show help options\n"); + printf(" \t-i <128bit SIRK>, Generate RSI ADV Data\n"); } static const struct option main_options[] = { + { "hash", no_argument, NULL, 'i' }, { "version", no_argument, NULL, 'v' }, { "help", no_argument, NULL, 'h' }, { } @@ -366,11 +438,15 @@ int main(int argc ,char *argv[]) for (;;) { int opt; - opt = getopt_long(argc, argv, "vh", main_options, NULL); + opt = getopt_long(argc, argv, "i:vh", main_options, NULL); if (opt < 0) break; switch (opt) { + case 'i': + printf("SIRK: %s\n", optarg); + generate_rsi(optarg); + return EXIT_SUCCESS; case 'v': printf("%s\n", VERSION); return EXIT_SUCCESS; |