package/base-files/files/lib/functions/system.sh

   1 # Copyright (C) 2006-2013 OpenWrt.org
   2
   3 . /lib/functions.sh
   4 . /usr/share/libubox/jshn.sh
   5
   6 get_mac_binary() {
   7         local path="$1"
   8         local offset="$2"
   9
  10         if ! [ -e "$path" ]; then
  11                 echo "get_mac_binary: file $path not found!" >&2
  12                 return
  13         fi
  14
  15         hexdump -v -n 6 -s $offset -e '5/1 "%02x:" 1/1 "%02x"' $path 2>/dev/null
  16 }
  17
  18 get_mac_label_dt() {
  19         local basepath="/proc/device-tree"
  20         local macdevice="$(cat "$basepath/aliases/label-mac-device" 2>/dev/null)"
  21         local macaddr
  22
  23         [ -n "$macdevice" ] || return
  24
  25         macaddr=$(get_mac_binary "$basepath/$macdevice/mac-address" 0 2>/dev/null)
  26         [ -n "$macaddr" ] || macaddr=$(get_mac_binary "$basepath/$macdevice/local-mac-address" 0 2>/dev/null)
  27
  28         echo $macaddr
  29 }
  30
  31 get_mac_label_json() {
  32         local cfg="/etc/board.json"
  33         local macaddr
  34
  35         [ -s "$cfg" ] || return
  36
  37         json_init
  38         json_load "$(cat $cfg)"
  39         if json_is_a system object; then
  40                 json_select system
  41                         json_get_var macaddr label_macaddr
  42                 json_select ..
  43         fi
  44
  45         echo $macaddr
  46 }
  47
  48 get_mac_label() {
  49         local macaddr=$(get_mac_label_dt)
  50
  51         [ -n "$macaddr" ] || macaddr=$(get_mac_label_json)
  52
  53         echo $macaddr
  54 }
  55
  56 find_mtd_chardev() {
  57         local INDEX=$(find_mtd_index "$1")
  58         local PREFIX=/dev/mtd
  59
  60         [ -d /dev/mtd ] && PREFIX=/dev/mtd/
  61         echo "${INDEX:+$PREFIX$INDEX}"
  62 }
  63
  64 mtd_get_mac_ascii() {
  65         local mtdname="$1"
  66         local key="$2"
  67         local part
  68         local mac_dirty
  69
  70         part=$(find_mtd_part "$mtdname")
  71         if [ -z "$part" ]; then
  72                 echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
  73                 return
  74         fi
  75
  76         mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
  77
  78         # "canonicalize" mac
  79         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
  80 }
  81
  82 mtd_get_mac_encrypted_arcadyan() {
  83         local iv="00000000000000000000000000000000"
  84         local key="2A4B303D7644395C3B2B7053553C5200"
  85         local mac_dirty
  86         local mtdname="$1"
  87         local part
  88         local size
  89
  90         part=$(find_mtd_part "$mtdname")
  91         if [ -z "$part" ]; then
  92                 echo "mtd_get_mac_encrypted_arcadyan: partition $mtdname not found!" >&2
  93                 return
  94         fi
  95
  96         # Config decryption and getting mac. Trying uencrypt and openssl utils.
  97         size=$((0x$(dd if=$part skip=9 bs=1 count=4 2>/dev/null | hexdump -v -e '1/4 "%08x"')))
  98         if [[ -f  "/usr/bin/uencrypt" ]]; then
  99                 mac_dirty=$(dd if=$part bs=1 count=$size skip=$((0x100)) 2>/dev/null | \
 100                         uencrypt -d -n -k $key -i $iv | grep mac | cut -c 5-)
 101         elif [[ -f  "/usr/bin/openssl" ]]; then
 102                 mac_dirty=$(dd if=$part bs=1 count=$size skip=$((0x100)) 2>/dev/null | \
 103                         openssl aes-128-cbc -d -nopad -K $key -iv $iv | grep mac | cut -c 5-)
 104         else
 105                 echo "mtd_get_mac_encrypted_arcadyan: Neither uencrypt nor openssl was found!" >&2
 106                 return
 107         fi
 108
 109         # "canonicalize" mac
 110         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
 111 }
 112
 113 mtd_get_mac_encrypted_deco() {
 114         local mtdname="$1"
 115
 116         if ! [ -e "$mtdname" ]; then
 117                 echo "mtd_get_mac_encrypted_deco: file $mtdname not found!" >&2
 118                 return
 119         fi
 120
 121         tplink_key="3336303032384339"
 122
 123         key=$(dd if=$mtdname bs=1 skip=16 count=8 2>/dev/null | \
 124                 uencrypt -n -d -k $tplink_key -c des-ecb | hexdump -v -n 8 -e '1/1 "%02x"')
 125
 126         macaddr=$(dd if=$mtdname bs=1 skip=32 count=8 2>/dev/null | \
 127                 uencrypt -n -d -k $key -c des-ecb | hexdump -v -n 6 -e '5/1 "%02x:" 1/1 "%02x"')
 128
 129         echo $macaddr
 130 }
 131
 132 mtd_get_mac_text() {
 133         local mtdname=$1
 134         local offset=$(($2))
 135         local part
 136         local mac_dirty
 137
 138         part=$(find_mtd_part "$mtdname")
 139         if [ -z "$part" ]; then
 140                 echo "mtd_get_mac_text: partition $mtdname not found!" >&2
 141                 return
 142         fi
 143
 144         if [ -z "$offset" ]; then
 145                 echo "mtd_get_mac_text: offset missing!" >&2
 146                 return
 147         fi
 148
 149         mac_dirty=$(dd if="$part" bs=1 skip="$offset" count=17 2>/dev/null)
 150
 151         # "canonicalize" mac
 152         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
 153 }
 154
 155 mtd_get_mac_binary() {
 156         local mtdname="$1"
 157         local offset="$2"
 158         local part
 159
 160         part=$(find_mtd_part "$mtdname")
 161         get_mac_binary "$part" "$offset"
 162 }
 163
 164 mtd_get_mac_binary_ubi() {
 165         local mtdname="$1"
 166         local offset="$2"
 167
 168         . /lib/upgrade/nand.sh
 169
 170         local ubidev=$(nand_find_ubi $CI_UBIPART)
 171         local part=$(nand_find_volume $ubidev $1)
 172
 173         get_mac_binary "/dev/$part" "$offset"
 174 }
 175
 176 mtd_get_part_size() {
 177         local part_name=$1
 178         local first dev size erasesize name
 179         while read dev size erasesize name; do
 180                 name=${name#'"'}; name=${name%'"'}
 181                 if [ "$name" = "$part_name" ]; then
 182                         echo $((0x$size))
 183                         break
 184                 fi
 185         done < /proc/mtd
 186 }
 187
 188 mmc_get_mac_binary() {
 189         local part_name="$1"
 190         local offset="$2"
 191         local part
 192
 193         part=$(find_mmc_part "$part_name")
 194         get_mac_binary "$part" "$offset"
 195 }
 196
 197 macaddr_add() {
 198         local mac=$1
 199         local val=$2
 200         local oui=${mac%:*:*:*}
 201         local nic=${mac#*:*:*:}
 202
 203         nic=$(printf "%06x" $((0x${nic//:/} + val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
 204         echo $oui:$nic
 205 }
 206
 207 macaddr_generate_from_mmc_cid() {
 208         local mmc_dev=$1
 209
 210         local sd_hash=$(sha256sum /sys/class/block/$mmc_dev/device/cid)
 211         local mac_base=$(macaddr_canonicalize "$(echo "${sd_hash}" | dd bs=1 count=12 2>/dev/null)")
 212         echo "$(macaddr_unsetbit_mc "$(macaddr_setbit_la "${mac_base}")")"
 213 }
 214
 215 macaddr_geteui() {
 216         local mac=$1
 217         local sep=$2
 218
 219         echo ${mac:9:2}$sep${mac:12:2}$sep${mac:15:2}
 220 }
 221
 222 macaddr_setbit() {
 223         local mac=$1
 224         local bit=${2:-0}
 225
 226         [ $bit -gt 0 -a $bit -le 48 ] || return
 227
 228         printf "%012x" $(( 0x${mac//:/} | 2**(48-bit) )) | sed -e 's/\(.\{2\}\)/\1:/g' -e 's/:$//'
 229 }
 230
 231 macaddr_unsetbit() {
 232         local mac=$1
 233         local bit=${2:-0}
 234
 235         [ $bit -gt 0 -a $bit -le 48 ] || return
 236
 237         printf "%012x" $(( 0x${mac//:/} & ~(2**(48-bit)) )) | sed -e 's/\(.\{2\}\)/\1:/g' -e 's/:$//'
 238 }
 239
 240 macaddr_setbit_la() {
 241         macaddr_setbit $1 7
 242 }
 243
 244 macaddr_unsetbit_mc() {
 245         local mac=$1
 246
 247         printf "%02x:%s" $((0x${mac%%:*} & ~0x01)) ${mac#*:}
 248 }
 249
 250 macaddr_random() {
 251         local randsrc=$(get_mac_binary /dev/urandom 0)
 252
 253         echo "$(macaddr_unsetbit_mc "$(macaddr_setbit_la "${randsrc}")")"
 254 }
 255
 256 macaddr_2bin() {
 257         local mac=$1
 258
 259         echo -ne \\x${mac//:/\\x}
 260 }
 261
 262 macaddr_canonicalize() {
 263         local mac="$1"
 264         local canon=""
 265
 266         mac=$(echo -n $mac | tr -d \")
 267         [ ${#mac} -gt 17 ] && return
 268         [ -n "${mac//[a-fA-F0-9\.: -]/}" ] && return
 269
 270         for octet in ${mac//[\.:-]/ }; do
 271                 case "${#octet}" in
 272                 1)
 273                         octet="0${octet}"
 274                         ;;
 275                 2)
 276                         ;;
 277                 4)
 278                         octet="${octet:0:2} ${octet:2:2}"
 279                         ;;
 280                 12)
 281                         octet="${octet:0:2} ${octet:2:2} ${octet:4:2} ${octet:6:2} ${octet:8:2} ${octet:10:2}"
 282                         ;;
 283                 *)
 284                         return
 285                         ;;
 286                 esac
 287                 canon=${canon}${canon:+ }${octet}
 288         done
 289
 290         [ ${#canon} -ne 17 ] && return
 291
 292         printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
 293 }
 294
 295 dt_is_enabled() {
 296         grep -q okay "/proc/device-tree/$1/status"
 297 }