96 lines
2.3 KiB
Bash
96 lines
2.3 KiB
Bash
#!/bin/bash
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LOGFILE="/home/sats/satsd/log/dwc.log";
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slog(){
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echo -e "$1" | sudo -u sats tee -a $LOGFILE > /dev/null;
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}
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failexit(){
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slog " > failed";
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exit 127;
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}
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connectedexit(){
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slog " > connected";
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slog "<<< Finished\n";
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exit 0;
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}
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test ! -f $LOGFILE && sudo -u sats touch $LOGFILE;
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HSALT="***SALT***";
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HPEPPER="***PEPPER***";
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slog ">>> Dynamic Wireless Credentials";
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# [1] Checking connectivity
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#========================================================#
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slog " * 1. Checking connectivity"
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[ -z "`ping xdrm.io -q -c 1 -i 1 2>&1 > /dev/null`" ] \
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&& connectedexit \
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|| slog " > offline";
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# [2] Wifi scan for "SATS_*" APs
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#========================================================#
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# (1) Get interface name #
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slog " * 2. Looking for wireless interface";
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IFACE=`sudo ifconfig -a | grep -P "^w" | awk '{print $1}' | head -n 1`;
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sudo ifconfig $IFACE up;
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# (2) Manage no IFACE found #
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test -z "$IFACE" && failexit;
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slog " > done (got '$IFACE')";
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# (3) Get nearest AP matching "SATS_*" and extract HASH #
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slog " * 3. Looking for nearest AP matching 'SATS_.+'";
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AP_HASH=`sudo iwlist $IFACE scan | grep -P "^\s*ESSID:\"SATS_.+\"\s*$" | sed 's/^[ \t]*ESSID:"SATS_//' | sed 's/"[ \t]*$//' | head -n 1`;
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# (4) Manage no AP found #
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test -z "$AP_HASH" && failexit;
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slog " > done (got 'SATS_$AP_HASH')";
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# [3] Calculate WIFI PASS from SSID hash
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#========================================================#
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slog " * 4. Processing WPA2 passphrase"
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PASS=`echo -ne "$HPEPPER$(echo -ne "${HSALT}${AP_HASH}" | sha512sum | sed 's/[ \t]*-$//')" | sha512sum | sed 's/[ \t]*-//' | cut -b 1-63`;
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slog " > done";
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# [4] Update 'wpa_supplicant' configuration
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#========================================================#
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echo -e "network={\n\tssid=\"SATS_$AP_HASH\"\n\tpsk=\"$PASS\"\n}" | sudo tee /etc/wpa_supplicant/$IFACE.conf;
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# [5] Restart connection
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#========================================================#
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# (1) Starting wpa_supplicant #
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slog " * 5. Starting wpa_supplicant"
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sudo pkill wpa_supplicant;
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sudo wpa_supplicant -B -Dwext -i$IFACE -c/etc/wpa_supplicant/$IFACE.conf \
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&& slog " > done" \
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|| failexit;
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# (2) Starting dhclient #
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slog " * 6. Starting dhclient"
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if [ ! -z "`pgrep dhclient`" ]; then
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slog " > already running";
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else
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sudo dhclient $IFACE \
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&& slog " > done" \
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|| failexit;
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fi;
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slog "<<< Finished\n";
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