Checks the security in DB2 (authorities at instance and database level)

db2cksec

#!/bin/bash
# The MIT License (MIT)
#
# Copyright (c) 2014 Andres Gomez Casanova
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

# Shows the security of the Operative System related to the users and groups in
# DB2. This script uses 'getent' to retrieve the information from different
# Unix databases for passwd (/etc/passwd, LDAP, ...)
# It is necessary to define a global variable with the location of the DB2
# binaries: DB2_DIR.
# If the variable is not defined, it will use: /opt/ibm/db2/V11.1
# For example:
#    export DB2_DIR=/opt/ibm/db2/V10.5
#
# This script is generic to any environment.
#
# Exit codes:
# 0: Ok.
# 1: DB2 binaries not found (db2greg). Please define the DB2_DIR variable.
#
# 2013-05-31 A. Gomez (AngocA) - Script creation.
# 2013-06-17 A. Gomez (AngocA) - Dynamic group analyses.
# 2013-07-09 A. Gomez (AngocA) - Problem fixed: empty authority group.
# 2013-09-06 A. Gomez (AngocA) - Correction in group id retrieval.
# 2014-08-04 A. Gomez (AngocA) - Getent to access all databases.
# 2016-09-21 A. Gomez (AngocA) - More dynamic, group optimization.

# DB2 path
DB2_DIR=${DB2_DIR:-/opt/ibm/db2/V11.1}

# Flag for debugging.
#set -xv

# Locale to print messages in English. Prevent language problems.
export LANG=en_US

# Shows the members of a OS group.
group () {
  GROUP=$(echo ${1} | tr '[A-Z]' '[a-z]')
  # Checks if getent exist in the server.
  getent 2> /dev/null
  if [[ ${?} -eq 127 ]] ; then
    # If getent is not present, uses /etc files.
    LINE=$(awk -F: "/^${GROUP}:/ {print \$3\":\"\$4}" /etc/group)
  else
    LINE=$(getent group | awk -F: "/^${GROUP}:/ {print \$3\":\"\$4}")
    if [[ -z ${LINE} ]] ; then
      # Sometimes it need twice to run correctly.
      GROUP=$(echo ${1} | tr '[A-Z]' '[a-z]')
      LINE=$(getent group | awk -F: "/^${GROUP}:/ {print \$3\":\"\$4}")
    fi
  fi
  MEMBERS_SEC=$(echo ${LINE} | cut -d':' -f2)
  ID=$(echo ${LINE} | cut -d':' -f1)
  MEMBERS_PRI=$(awk -F: "/:${ID}:/ {print \$1}" /etc/passwd | sed -e :a -e '$!N; s/\n/,/; ta')
  #MEMBERS_PRI=$(getent passwd | awk -F: "{print \$1\":\"\$4\":\"}" | awk -F: "/:${ID}:/ {print \$1}" | sed -e :a -e '$!N; s/\n/, /; ta')
  if [[ -z ${LINE} ]] ; then
    echo "   Group: ${GROUP} is not known in the system"
  else
    echo "   Group: ${GROUP} (ID ${ID})"
    COL_MEMBERS=$(echo "${MEMBERS_PRI},${MEMBERS_SEC}" | tr -s ','  '\n' | sort | uniq | tr -s '\n' ',')
    echo "    Members: ${COL_MEMBERS}"
  fi
}

# Checks if db2greg exist.
if [[ ! -x ${DB2_DIR}/bin/db2greg ]] ; then
  echo "Please define the DB2_DIR global variable to point to the"
  echo "db2 binaries."
  echo "  export DB2_DIR=/opt/ibm/db2/V11.1"
  exit 1
fi

INSTANCES=$(${DB2_DIR}/bin/db2greg -dump | awk -F, '/^I,DB2/ && /\/sqllib,/ {print $4}')

# Show security at instance level.
echo "Security at instance level:"
while IFS= read INST ; do
  echo " Instance ${INST}"
  eval . ~${INST}/sqllib/db2profile

  while IFS= read LINE ; do
    AUTH=$(echo ${LINE} | cut -d' ' -f1 | sed 's/[(|)]//g')
    echo "  Authority: ${AUTH}"
    if [[ $(echo ${LINE} | wc -w) -eq 2 ]] ; then
      GROUP=$(echo ${LINE} | cut -d' ' -f2)
      group ${GROUP}
    else
      echo "   There is not an group associated with this authority"
    fi
  done < <( db2 get dbm cfg | awk '/_GROUP/ {print $4,$6}' )
done < <( printf '%s\n' "${INSTANCES}" )
echo

# Show security at database level.
echo "Security at database level:"
while IFS= read INST ; do
  echo " Instance ${INST}"
  eval . ~${INST}/sqllib/db2profile

  DBS=$(db2 list db directory | tail -n +6 | awk '/^Database /  {if (NR!=1) print ""; next} {printf $0} END {print "a";}' | awk '/Indirect/ {print $4}')

  while IFS= read DB ; do
    DB_NAME=$(db2 connect to ${DB} | awk '/alias/ {print $5}')
    if [[ ${DB_NAME} != "" ]] ; then
      echo "  Database ${DB}"
      db2 connect to ${DB} > /dev/null
      db2 "select '  ' || varchar(substr(grantee, 1, 10), 10) grantee, varchar(substr(grantor, 1, 10), 10) as \"<--GRANTOR\", granteetype type, dbadmauth dbadm, securityadmauth secadm, wlmadmauth wladm, DATAACCESSAUTH data, ACCESSCTRLAUTH ACCESS, BINDADDAUTH bind, CONNECTAUTH conn, CREATETABAUTH crttab, EXTERNALROUTINEAUTH extrout, IMPLSCHEMAAUTH implsche, LOADAUTH load, NOFENCEAUTH nofenc, QUIESCECONNECTAUTH quies, LIBRARYADMAUTH lib, SQLADMAUTH sql, EXPLAINAUTH expl from syscat.dbauth order by type desc, grantee" | grep -e "^$" -v | grep -v "record(s) selected."
      while IFS= read GROUP ; do
        group ${GROUP}
      done < <( db2 connect to ${DB} > /dev/null ; db2 -x "select substr(grantee,1,10) grantee from syscat.dbauth where granteetype = 'G' group by grantee" )
      db2 terminate > /dev/null
    else
      echo "Connection error for ${DB}"
      db2 connect to ${DB}
    fi
  done < <( printf '%s\n' "${DBS}" )
  db2 terminate > /dev/null

done < <( printf '%s\n' "${INSTANCES}" )

This file is now part of db2admintools: https://github.com/angoca/db2admintools/blob/master/bin/db2cksec