From 70d7b4f7190730731d77a61de61be393deca9abd Mon Sep 17 00:00:00 2001 From: Klaus K Wilting Date: Sun, 1 Apr 2018 22:14:51 +0200 Subject: [PATCH] salt bugfix --- src/wifisniffer.cpp | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/src/wifisniffer.cpp b/src/wifisniffer.cpp index 55b9fc19..ca43a217 100644 --- a/src/wifisniffer.cpp +++ b/src/wifisniffer.cpp @@ -60,7 +60,7 @@ void wifi_sniffer_packet_handler(void* buff, wifi_promiscuous_pkt_type_t type) { const wifi_ieee80211_packet_t *ipkt = (wifi_ieee80211_packet_t *)ppkt->payload; const wifi_ieee80211_mac_hdr_t *hdr = &ipkt->hdr; char counter [6]; // uint16_t -> 2 byte -> 5 decimals + '0' terminator -> 6 chars - char macbuf [21]; // uint64_t -> 8 byte -> 20 decimals + '0' terminator -> 21 chars + char macbuf [21]; // uint64_t -> 8 byte -> 10 decimals + '0' terminator -> 21 chars uint64_t addr2int; uint32_t vendor2int; uint16_t hashedmac; @@ -77,14 +77,15 @@ void wifi_sniffer_packet_handler(void* buff, wifi_promiscuous_pkt_type_t type) { // salt and hash MAC, and if new unique one, store identifier in container and increment counter on display // https://en.wikipedia.org/wiki/MAC_Address_Anonymization - addr2int |= (uint64_t) salt << 48; // prepend 12 bit salt to 48 bit MAC - itoa(addr2int, macbuf, 10); // convert 64 bit MAC to base 10 decimal string - hashedmac = rokkit(macbuf, 5); // hash MAC, use 5 chars to fit hash in uint16_t container - newmac = macs.insert(hashedmac); // store hashed MAC if new unique - if (newmac.second) { // first time seen MAC - macnum++; // increment MAC counter - itoa(macnum, counter, 10); // base 10 decimal counter value - u8x8.draw2x2String(0, 0, counter); + addr2int |= (uint64_t) salt << 48; // prepend 16-bit salt to 48-bit MAC + snprintf(macbuf, 21, "%llx", addr2int); // convert unsigned 64-bit salted MAC to 16 digit hex string + hashedmac = rokkit(macbuf, 5); // hash MAC, use 5 chars to fit hash in uint16_t container + newmac = macs.insert(hashedmac); // store hashed MAC if new unique + if (newmac.second) { // first time seen MAC + macnum++; // increment MAC counter + snprintf(counter, 6, "%i", macnum); // convert 16-bit MAC counter to decimal counter value + u8x8.draw2x2String(0, 0, counter); // display counter + ESP_LOGI(TAG, "addr2int: %016llx macbuf: %s", addr2int, macbuf); ESP_LOGI(TAG, "#%05i: RSSI %04d -> Salt %04x -> Hash %04x", macnum, ppkt->rx_ctrl.rssi, salt, hashedmac); }