RackTables git mirrors - racktables/blob - gateways/lib.sh

   1 #!/bin/sh
   2
   3 authorized()
   4 {
   5         local endp=$1 user=$2 action=$3 arg1=$4 arg2=$5 skip=yes cval
   6         [ -z "$endp" -o -z "$user" -o -z "$action" ] && return 1
   7
   8         # Now we strip PHP wrapping(s) and process auth rules only.
   9         # Accept more than one ruleset on the floor.
  10         while read line; do
  11                 if [ "$skip" = "yes" -a "$line" = "# S-T-A-R-T" ]; then
  12                         skip=no
  13                         continue
  14                 fi
  15                 if [ "$skip" = "no" -a "$line" = "# S-T-O-P" ]; then
  16                         skip=yes
  17                         continue
  18                 fi
  19                 [ "$skip" = "yes" ] && continue
  20                 # Allow comments.
  21                 [ -z "${line###*}" ] && continue
  22
  23                 # Parse the line and try to make a decision earliest possible.
  24                 # Username and endpoint must match values/regexps, action
  25                 # must exactly match. Action arguments are tested agains values
  26                 # or regexps, but only for 'change' action.
  27                 # If the current rule doesn't match, advance to the next one.
  28                 # We will fail authorization by default anyway.
  29
  30                 # Test action.
  31                 cval=`echo "$line" | cut -s -d' ' -f3`
  32                 [ "$action" = "$cval" ] || continue
  33
  34                 # Test username.
  35                 cval=`echo "$line" | cut -s -d' ' -f2 | cut -s -d'@' -f1`
  36                 [ -z "${user##$cval}" ] || continue
  37
  38                 # Test endpoint.
  39                 cval=`echo "$line" | cut -s -d' ' -f2 | cut -s -d'@' -f2`
  40                 [ -z "${endp##$cval}" ] || continue
  41
  42                 if [ "$action" = "change" ]; then
  43                         [ -z "$arg1" -o -z "$arg2" ] && return 1
  44                         cval=`echo "$line" | cut -s -d' ' -f4`
  45                         [ -z "${arg1##$cval}" ] || continue
  46                         cval=`echo "$line" | cut -s -d' ' -f5`
  47                         [ -z "${arg2##$cval}" ] || continue
  48                 fi
  49
  50                 # All criterias match. Pick the permission and bail out.
  51                 cval=`echo "$line" | cut -s -d' ' -f1`
  52                 if [ "$cval" = "allow" ]; then
  53                         return 0
  54                 else
  55                         return 1
  56                 fi
  57         done < "$MYDIR/userauth.php"
  58         return 1
  59 }