ldapsearch-guidfilter

#!/bin/bash
# print base64 UUIDs on command line as LDAP search filter of the form:
# (|(ObjectGuid=\xx\xx\xx\xx\xx\xx\xx\xx\xx\xx\xx\xx\xx\xx\xx\xx)...)

fn_base64_uuid_to_hexarray() {
  # hexdump base64 valie in $2 to a new indexed array of hex values and name the array $1

  # declare global array, not assigning a value for 2 reasons:
  # - command substitution exit code would be discarded
  # - declaring arrays with variable name require quoting the right side: $n='(1 2 3)'
  declare -a -g ${1:?}

  # declare a local nameref with a static name so no quoting is needed
  local -n a=${1:?}
  a=( $(echo "${2:?}" | base64 -d | fn_hexdump_stdin) )
}

fn_hexdump_stdin() {
  # hexdump stdin as values separated by space

  hexdump -v -e '1/1 " %02X"'
}

fn_format_hexarray_uuid_as_isostr() {
  #ex: fn_format_hexarray_uuid_as_iso hexarray
  local -n G=${1:?}
  OBJECTGUID="${G[3]}${G[2]}${G[1]}${G[0]}-${G[5]}${G[4]}-${G[7]}${G[6]}-${G[8]}${G[9]}-${G[10]}${G[11]}${G[12]}${G[13]}${G[14]}${G[15]:?}"
}

fn_format_hexarray_as_ldap_filter_value() {
  # escape hexarray named $1 as ldap filter value and store in variable named $2

  declare -g ${2:?}=
  local -n G=${1:?}
  local -n s=${2:?}
  for h in "${G[@]}"; do
    s=$s'\'$h
  done
}

printf '(|'
for OBJECT_ID in "$@"; do
  fn_base64_uuid_to_hexarray hexarray "$OBJECT_ID"
  fn_format_hexarray_as_ldap_filter_value hexarray ldap_filter_value
  printf '(ObjectGuid=%s)' "$ldap_filter_value"
done
printf ')\n'