#!/bin/sh

# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# SPDX-License-Identifier: MPL-2.0
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0.  If a copy of the MPL was not distributed with this
# file, you can obtain one at https://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.

#
# Common configuration data for kasp system tests, to be sourced into
# other shell scripts.
#

# shellcheck source=conf.sh
. ../conf.sh

###############################################################################
# Constants                                                                   #
###############################################################################
DEFAULT_TTL=300

###############################################################################
# Query properties                                                            #
###############################################################################
TSIG=""
SHA1="FrSt77yPTFx6hTs4i2tKLB9LmE0="
SHA224="hXfwwwiag2QGqblopofai9NuW28q/1rH4CaTnA=="
SHA256="R16NojROxtxH/xbDl//ehDsHm5DjWTQ2YXV+hGC2iBY="
VIEW1="YPfMoAk6h+3iN8MDRQC004iSNHY="
VIEW2="4xILSZQnuO1UKubXHkYUsvBRPu8="
VIEW3="C1Azf+gGPMmxrUg/WQINP6eV9Y0="
MINDEPTH=1
MAXDEPTH=3

###############################################################################
# Key properties                                                              #
###############################################################################
# ID
# BASEFILE
# EXPECT
# ROLE
# KSK
# ZSK
# FLAGS
# LIFETIME
# ALG_NUM
# ALG_STR
# ALG_LEN
# CREATED
# PUBLISHED
# ACTIVE
# RETIRED
# REVOKED
# REMOVED
# GOAL
# STATE_DNSKEY
# STATE_ZRRSIG
# STATE_KRRSIG
# STATE_DS
# EXPECT_ZRRSIG
# EXPECT_KRRSIG
# LEGACY
# PRIVATE
# PRIVKEY_STAT
# PUBKEY_STAT
# STATE_STAT
# FLAGS
# KEYDIR

key_key() {
  echo "${1}__${2}"
}

key_get() {
  eval "echo \${$(key_key "$1" "$2")}"
}

key_set() {
  eval "$(key_key "$1" "$2")='$3'"
}

key_stat() {
  $PERL -e 'print((stat @ARGV[0])[9] . "\n");' "$1"
}

# Save certain values in the KEY array.
key_save() {
  # Save key id.
  key_set "$1" ID "$KEY_ID"
  key_set "$1" RID "$KEY_RID"
  # Save base filename.
  key_set "$1" BASEFILE "$BASE_FILE"
  # Save creation date.
  key_set "$1" CREATED "${KEY_CREATED}"
  # Save key change time.
  key_set "$1" PRIVKEY_STAT $(key_stat "${BASE_FILE}.private")
  key_set "$1" PUBKEY_STAT $(key_stat "${BASE_FILE}.key")
  key_set "$1" STATE_STAT $(key_stat "${BASE_FILE}.state")
}

# Clear key state.
#
# This will update either the KEY1, KEY2, or KEY3 array.
key_clear() {
  key_set "$1" "ID" 'no'
  key_set "$1" "RID" 'no'
  key_set "$1" "IDPAD" 'no'
  key_set "$1" "EXPECT" 'no'
  key_set "$1" "ROLE" 'none'
  key_set "$1" "KSK" 'no'
  key_set "$1" "ZSK" 'no'
  key_set "$1" "FLAGS" '0'
  key_set "$1" "LIFETIME" 'none'
  key_set "$1" "ALG_NUM" '0'
  key_set "$1" "ALG_STR" 'none'
  key_set "$1" "ALG_LEN" '0'
  key_set "$1" "CREATED" '0'
  key_set "$1" "PUBLISHED" 'none'
  key_set "$1" "SYNCPUBLISH" 'none'
  key_set "$1" "ACTIVE" 'none'
  key_set "$1" "RETIRED" 'none'
  key_set "$1" "REVOKED" 'none'
  key_set "$1" "REMOVED" 'none'
  key_set "$1" "GOAL" 'none'
  key_set "$1" "STATE_DNSKEY" 'none'
  key_set "$1" "STATE_KRRSIG" 'none'
  key_set "$1" "STATE_ZRRSIG" 'none'
  key_set "$1" "STATE_DS" 'none'
  key_set "$1" "EXPECT_ZRRSIG" 'no'
  key_set "$1" "EXPECT_KRRSIG" 'no'
  key_set "$1" "LEGACY" 'no'
  key_set "$1" "PRIVATE" 'yes'
  key_set "$1" "PRIVKEY_STAT" '0'
  key_set "$1" "PUBKEY_STAT" '0'
  key_set "$1" "STATE_STAT" '0'
  key_set "$1" "KEYDIR" 'none'
}

# Start clear.
# There can be at most 4 keys at the same time during a rollover:
# 2x KSK, 2x ZSK
key_clear "KEY1"
key_clear "KEY2"
key_clear "KEY3"
key_clear "KEY4"

###############################################################################
# Utilities                                                                   #
###############################################################################

# Call dig with default options.
_dig_with_opts() {

  if [ -n "$TSIG" ]; then
    "$DIG" +tcp +noadd +nosea +nostat +nocmd +dnssec -p "$PORT" -y "$TSIG" "$@"
  else
    "$DIG" +tcp +noadd +nosea +nostat +nocmd +dnssec -p "$PORT" "$@"
  fi
}

# RNDC.
_rndccmd() {
  "$RNDC" -c ../_common/rndc.conf -p "$CONTROLPORT" -s "$@"
}

# Print IDs of keys used for generating RRSIG records for RRsets of type $1,
# matching algorithm number $2, found in dig output file $3.
# If $2 is equal to 0, any algorithm matches.
get_keys_which_signed() {
  _qtype=$1
  _alg=$2
  _output=$3
  # The key ID is the 11th column of the RRSIG record line.
  if [ "$_alg" = "0" ]; then
    awk -v qt="$_qtype" '$4 == "RRSIG" && $5 == qt {print $11}' <"$_output"
  else
    awk -v alg="$_alg" -v qt="$_qtype" '$4 == "RRSIG" && $5 == qt && $6 == alg {print $11}' <"$_output"
  fi
}

# Get the key ids from key files for zone $2 in directory $1.
get_keyids() {
  _dir=$1
  _zone=$2
  _regex="K${_zone}.+*+*.key"

  find "${_dir}" -mindepth $MINDEPTH -maxdepth $MAXDEPTH -name "${_regex}" | sed "s,.*/K${_zone}.+\([0-9]\{3\}\)+\([0-9]\{5\}\).key,\2,"
}

# By default log errors and don't quit immediately.
_log=1
_log_error() {
  test $_log -eq 1 && echo_i "error: $1"
  ret=$((ret + 1))
}
disable_logerror() {
  _log=0
}
enable_logerror() {
  _log=1
}

# Set server key-directory ($1) and address ($2) for testing keys.
set_server() {
  DIR=$1
  SERVER=$2
}
# Set zone name for testing keys.
set_zone() {
  ZONE=$1
  DYNAMIC="no"
}
# By default zones are considered static.
# When testing dynamic zones, call 'set_dynamic' after 'set_zone'.
set_dynamic() {
  DYNAMIC="yes"
}

# Set policy settings (name $1, number of keys $2, dnskey ttl $3).
set_policy() {
  POLICY=$1
  NUM_KEYS=$2
  DNSKEY_TTL=$3
  KEYFILE_TTL=$3
  CDS_DELETE="no"
  CDS_SHA256="yes"
  CDS_SHA384="no"
  CDNSKEY="yes"
}
# By default policies are considered to be secure.
# If a zone sets its policy to "insecure", call 'set_cdsdelete' to tell the
# system test to expect a CDS and CDNSKEY Delete record.
set_cdsdelete() {
  CDS_DELETE="yes"
}

# Set key properties for testing keys.
# $1: Key to update (KEY1, KEY2, ...)
# $2: Value
set_keyrole() {
  key_set "$1" "EXPECT" "yes"
  key_set "$1" "ROLE" "$2"
  key_set "$1" "KSK" "no"
  key_set "$1" "ZSK" "no"
  key_set "$1" "FLAGS" "0"

  test "$2" = "ksk" && key_set "$1" "KSK" "yes"
  test "$2" = "ksk" && key_set "$1" "FLAGS" "257"

  test "$2" = "zsk" && key_set "$1" "ZSK" "yes"
  test "$2" = "zsk" && key_set "$1" "FLAGS" "256"

  test "$2" = "csk" && key_set "$1" "KSK" "yes"
  test "$2" = "csk" && key_set "$1" "ZSK" "yes"
  test "$2" = "csk" && key_set "$1" "FLAGS" "257"

  return 0
}
set_keylifetime() {
  key_set "$1" "EXPECT" "yes"
  key_set "$1" "LIFETIME" "$2"
}
# The algorithm value consists of three parts:
# $2: Algorithm (number)
# $3: Algorithm (string-format)
# $4: Algorithm length
set_keyalgorithm() {
  key_set "$1" "EXPECT" "yes"
  key_set "$1" "ALG_NUM" "$2"
  key_set "$1" "ALG_STR" "$3"
  key_set "$1" "ALG_LEN" "$4"
}
set_keysigning() {
  key_set "$1" "EXPECT" "yes"
  key_set "$1" "EXPECT_KRRSIG" "$2"
}
set_zonesigning() {
  key_set "$1" "EXPECT" "yes"
  key_set "$1" "EXPECT_ZRRSIG" "$2"
}

# Set key timing metadata. Set to "none" to unset.
# $1: Key to update (KEY1, KEY2, ...)
# $2: Time to update (PUBLISHED, SYNCPUBLISH, ACTIVE, RETIRED, REVOKED, or REMOVED).
# $3: Value
set_keytime() {
  key_set "$1" "EXPECT" "yes"
  key_set "$1" "$2" "$3"
}

# Set key timing metadata to a value plus additional time.
# $1: Key to update (KEY1, KEY2, ...)
# $2: Time to update (PUBLISHED, SYNCPUBLISH, ACTIVE, RETIRED, REVOKED, or REMOVED).
# $3: Value
# $4: Additional time.
set_addkeytime() {
  if [ -x "$PYTHON" ]; then
    # Convert "%Y%m%d%H%M%S" format to epoch seconds.
    # Then, add the additional time (can be negative).
    _value=$3
    _plus=$4
    $PYTHON >python.out.$ZONE.$1.$2 <<EOF
from datetime import datetime
from datetime import timedelta
_now = datetime.strptime("$_value", "%Y%m%d%H%M%S")
_delta = timedelta(seconds=$_plus)
_then = _now + _delta
print(_then.strftime("%Y%m%d%H%M%S"));
EOF
    # Set the expected timing metadata.
    key_set "$1" "$2" $(cat python.out.$ZONE.$1.$2)
  fi
}

# Set key state metadata. Set to "none" to unset.
# $1: Key to update (KEY1, KEY2, ...)
# $2: Key state to update (GOAL, STATE_DNSKEY, STATE_ZRRSIG, STATE_KRRSIG, or STATE_DS)
# $3: Value
set_keystate() {
  key_set "$1" "EXPECT" "yes"
  key_set "$1" "$2" "$3"
}

# Set key directory.
# $1: Key to update (KEY1, KEY2, ...)
# $2: Directory.
set_keydir() {
  key_set "$1" "KEYDIR" "$2"
}

# Check the key $1 with id $2.
# This requires environment variables to be set.
#
# This will set the following environment variables for testing:
# BASE_FILE="${_dir}/K${_zone}.+${_alg_numpad}+${_key_idpad}"
# KEY_FILE="${BASE_FILE}.key"
# PRIVATE_FILE="${BASE_FILE}.private"
# STATE_FILE="${BASE_FILE}.state"
# KEY_ID=$(echo $1 | sed 's/^0\{0,4\}//')
# KEY_CREATED (from the KEY_FILE)
check_key() {
  _dir=$(key_get "$1" KEYDIR)
  if [ "$_dir" = "none" ]; then
    _dir="$DIR"
  fi
  _zone="$ZONE"
  _role=$(key_get "$1" ROLE)
  _key_idpad="$2"
  _key_id=$(echo "$_key_idpad" | sed 's/^0\{0,4\}//')
  _alg_num=$(key_get "$1" ALG_NUM)
  _alg_numpad=$(printf "%03d" "$_alg_num")
  _alg_string=$(key_get "$1" ALG_STR)
  _length=$(key_get "$1" "ALG_LEN")
  _dnskey_ttl="$KEYFILE_TTL"
  _lifetime=$(key_get "$1" LIFETIME)
  _legacy=$(key_get "$1" LEGACY)
  _private=$(key_get "$1" PRIVATE)
  _flags=$(key_get "$1" FLAGS)

  _published=$(key_get "$1" PUBLISHED)
  _active=$(key_get "$1" ACTIVE)
  _retired=$(key_get "$1" RETIRED)
  _revoked=$(key_get "$1" REVOKED)
  _removed=$(key_get "$1" REMOVED)

  _goal=$(key_get "$1" GOAL)
  _state_dnskey=$(key_get "$1" STATE_DNSKEY)
  _state_zrrsig=$(key_get "$1" STATE_ZRRSIG)
  _state_krrsig=$(key_get "$1" STATE_KRRSIG)
  _state_ds=$(key_get "$1" STATE_DS)

  _ksk="no"
  _zsk="no"
  if [ "$_role" = "ksk" ]; then
    _ksk="yes"
  elif [ "$_role" = "zsk" ]; then
    _zsk="yes"
  elif [ "$_role" = "csk" ]; then
    _zsk="yes"
    _ksk="yes"
  fi

  _role2="none"
  if [ "$_flags" = "257" ]; then
    _role2="key-signing"
  elif [ "$_flags" = "256" ]; then
    _role2="zone-signing"
  fi

  BASE_FILE="${_dir}/K${_zone}.+${_alg_numpad}+${_key_idpad}"
  KEY_FILE="${BASE_FILE}.key"
  PRIVATE_FILE="${BASE_FILE}.private"
  STATE_FILE="${BASE_FILE}.state"
  KEY_ID="${_key_id}"

  # Check file existence.
  [ -s "$KEY_FILE" ] || ret=1
  if [ "$_private" = "yes" ]; then
    [ -s "$PRIVATE_FILE" ] || ret=1
  fi
  if [ "$_legacy" = "no" ]; then
    [ -s "$STATE_FILE" ] || ret=1
  fi
  [ "$ret" -eq 0 ] || _log_error "${BASE_FILE} files missing"
  [ "$ret" -eq 0 ] || return 0

  # Retrieve revoked key id
  KEY_RID=$($REVOKE -R ${BASE_FILE})

  # Retrieve creation date.
  grep "; Created:" "$KEY_FILE" >"${ZONE}.${KEY_ID}.${_alg_num}.created" || _log_error "mismatch created comment in $KEY_FILE"
  KEY_CREATED=$(awk '{print $3}' <"${ZONE}.${KEY_ID}.${_alg_num}.created")

  if [ "$_private" = "yes" ]; then
    grep "Created: ${KEY_CREATED}" "$PRIVATE_FILE" >/dev/null || _log_error "mismatch created in $PRIVATE_FILE"
  fi
  if [ "$_legacy" = "no" ]; then
    grep "Generated: ${KEY_CREATED}" "$STATE_FILE" >/dev/null || _log_error "mismatch generated in $STATE_FILE"
  fi

  test $_log -eq 1 && echo_i "check key file $BASE_FILE"

  # Check the public key file.
  grep "This is a ${_role2} key, keyid ${_key_id}, for ${_zone}." "$KEY_FILE" >/dev/null || _log_error "mismatch top comment in $KEY_FILE"
  grep "${_zone}\. ${_dnskey_ttl} IN DNSKEY ${_flags} 3 ${_alg_num}" "$KEY_FILE" >/dev/null || _log_error "mismatch DNSKEY record in $KEY_FILE"
  # Now check the private key file.
  if [ "$_private" = "yes" ]; then
    grep "Private-key-format: v1.3" "$PRIVATE_FILE" >/dev/null || _log_error "mismatch private key format in $PRIVATE_FILE"
    grep "Algorithm: ${_alg_num} (${_alg_string})" "$PRIVATE_FILE" >/dev/null || _log_error "mismatch algorithm in $PRIVATE_FILE"
  fi
  # Now check the key state file.
  if [ "$_legacy" = "no" ]; then
    grep "This is the state of key ${_key_id}, for ${_zone}." "$STATE_FILE" >/dev/null || _log_error "mismatch top comment in $STATE_FILE"
    if [ "$_lifetime" = "none" ]; then
      grep "Lifetime: " "$STATE_FILE" >/dev/null && _log_error "unexpected lifetime in $STATE_FILE"
    else
      grep "Lifetime: ${_lifetime}" "$STATE_FILE" >/dev/null || _log_error "mismatch lifetime in $STATE_FILE"
    fi
    grep "Algorithm: ${_alg_num}" "$STATE_FILE" >/dev/null || _log_error "mismatch algorithm in $STATE_FILE"
    grep "Length: ${_length}" "$STATE_FILE" >/dev/null || _log_error "mismatch length in $STATE_FILE"
    grep "KSK: ${_ksk}" "$STATE_FILE" >/dev/null || _log_error "mismatch ksk in $STATE_FILE"
    grep "ZSK: ${_zsk}" "$STATE_FILE" >/dev/null || _log_error "mismatch zsk in $STATE_FILE"

    # Check key states.
    if [ "$_goal" = "none" ]; then
      grep "GoalState: " "$STATE_FILE" >/dev/null && _log_error "unexpected goal state in $STATE_FILE"
    else
      grep "GoalState: ${_goal}" "$STATE_FILE" >/dev/null || _log_error "mismatch goal state in $STATE_FILE"
    fi

    if [ "$_state_dnskey" = "none" ]; then
      grep "DNSKEYState: " "$STATE_FILE" >/dev/null && _log_error "unexpected dnskey state in $STATE_FILE"
      grep "DNSKEYChange: " "$STATE_FILE" >/dev/null && _log_error "unexpected dnskey change in $STATE_FILE"
    else
      grep "DNSKEYState: ${_state_dnskey}" "$STATE_FILE" >/dev/null || _log_error "mismatch dnskey state in $STATE_FILE"
      grep "DNSKEYChange: " "$STATE_FILE" >/dev/null || _log_error "mismatch dnskey change in $STATE_FILE"
    fi

    if [ "$_state_zrrsig" = "none" ]; then
      grep "ZRRSIGState: " "$STATE_FILE" >/dev/null && _log_error "unexpected zrrsig state in $STATE_FILE"
      grep "ZRRSIGChange: " "$STATE_FILE" >/dev/null && _log_error "unexpected zrrsig change in $STATE_FILE"
    else
      grep "ZRRSIGState: ${_state_zrrsig}" "$STATE_FILE" >/dev/null || _log_error "mismatch zrrsig state in $STATE_FILE"
      grep "ZRRSIGChange: " "$STATE_FILE" >/dev/null || _log_error "mismatch zrrsig change in $STATE_FILE"
    fi

    if [ "$_state_krrsig" = "none" ]; then
      grep "KRRSIGState: " "$STATE_FILE" >/dev/null && _log_error "unexpected krrsig state in $STATE_FILE"
      grep "KRRSIGChange: " "$STATE_FILE" >/dev/null && _log_error "unexpected krrsig change in $STATE_FILE"
    else
      grep "KRRSIGState: ${_state_krrsig}" "$STATE_FILE" >/dev/null || _log_error "mismatch krrsig state in $STATE_FILE"
      grep "KRRSIGChange: " "$STATE_FILE" >/dev/null || _log_error "mismatch krrsig change in $STATE_FILE"
    fi

    if [ "$_state_ds" = "none" ]; then
      grep "DSState: " "$STATE_FILE" >/dev/null && _log_error "unexpected ds state in $STATE_FILE"
      grep "DSChange: " "$STATE_FILE" >/dev/null && _log_error "unexpected ds change in $STATE_FILE"
    else
      grep "DSState: ${_state_ds}" "$STATE_FILE" >/dev/null || _log_error "mismatch ds state in $STATE_FILE"
      grep "DSChange: " "$STATE_FILE" >/dev/null || _log_error "mismatch ds change in $STATE_FILE"
    fi
  fi

  return 0
}

# Check the key timing metadata for key $1.
check_timingmetadata() {
  _dir=$(key_get "$1" KEYDIR)
  if [ "$_dir" = "none" ]; then
    _dir="$DIR"
  fi
  _zone="$ZONE"
  _key_idpad=$(key_get "$1" ID)
  _key_id=$(echo "$_key_idpad" | sed 's/^0\{0,4\}//')
  _alg_num=$(key_get "$1" ALG_NUM)
  _alg_numpad=$(printf "%03d" "$_alg_num")

  _published=$(key_get "$1" PUBLISHED)
  _active=$(key_get "$1" ACTIVE)
  _retired=$(key_get "$1" RETIRED)
  _revoked=$(key_get "$1" REVOKED)
  _removed=$(key_get "$1" REMOVED)

  _goal=$(key_get "$1" GOAL)
  _state_dnskey=$(key_get "$1" STATE_DNSKEY)
  _state_zrrsig=$(key_get "$1" STATE_ZRRSIG)
  _state_krrsig=$(key_get "$1" STATE_KRRSIG)
  _state_ds=$(key_get "$1" STATE_DS)

  _base_file=$(key_get "$1" BASEFILE)
  _key_file="${_base_file}.key"
  _private_file="${_base_file}.private"
  _state_file="${_base_file}.state"
  _legacy=$(key_get "$1" LEGACY)
  _private=$(key_get "$1" PRIVATE)

  _published=$(key_get "$1" PUBLISHED)
  _syncpublish=$(key_get "$1" SYNCPUBLISH)
  _active=$(key_get "$1" ACTIVE)
  _retired=$(key_get "$1" RETIRED)
  _revoked=$(key_get "$1" REVOKED)
  _removed=$(key_get "$1" REMOVED)

  # Check timing metadata.
  n=$((n + 1))
  echo_i "check key timing metadata for key $1 id ${_key_id} zone ${ZONE} ($n)"
  ret=0

  if [ "$_published" = "none" ]; then
    grep "; Publish:" "${_key_file}" >/dev/null && _log_error "unexpected publish comment in ${_key_file}"
    if [ "$_private" = "yes" ]; then
      grep "Publish:" "${_private_file}" >/dev/null && _log_error "unexpected publish in ${_private_file}"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Published: " "${_state_file}" >/dev/null && _log_error "unexpected publish in ${_state_file}"
    fi
  else
    grep "; Publish: $_published" "${_key_file}" >/dev/null || _log_error "mismatch publish comment in ${_key_file} (expected ${_published})"
    if [ "$_private" = "yes" ]; then
      grep "Publish: $_published" "${_private_file}" >/dev/null || _log_error "mismatch publish in ${_private_file} (expected ${_published})"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Published: $_published" "${_state_file}" >/dev/null || _log_error "mismatch publish in ${_state_file} (expected ${_published})"
    fi
  fi

  if [ "$_syncpublish" = "none" ]; then
    grep "; SyncPublish:" "${_key_file}" >/dev/null && _log_error "unexpected syncpublish comment in ${_key_file}"
    if [ "$_private" = "yes" ]; then
      grep "SyncPublish:" "${_private_file}" >/dev/null && _log_error "unexpected syncpublish in ${_private_file}"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "PublishCDS: " "${_state_file}" >/dev/null && _log_error "unexpected syncpublish in ${_state_file}"
    fi
  else
    grep "; SyncPublish: $_syncpublish" "${_key_file}" >/dev/null || _log_error "mismatch syncpublish comment in ${_key_file} (expected ${_syncpublish})"
    if [ "$_private" = "yes" ]; then
      grep "SyncPublish: $_syncpublish" "${_private_file}" >/dev/null || _log_error "mismatch syncpublish in ${_private_file} (expected ${_syncpublish})"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "PublishCDS: $_syncpublish" "${_state_file}" >/dev/null || _log_error "mismatch syncpublish in ${_state_file} (expected ${_syncpublish})"
    fi
  fi

  if [ "$_active" = "none" ]; then
    grep "; Activate:" "${_key_file}" >/dev/null && _log_error "unexpected active comment in ${_key_file}"
    if [ "$_private" = "yes" ]; then
      grep "Activate:" "${_private_file}" >/dev/null && _log_error "unexpected active in ${_private_file}"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Active: " "${_state_file}" >/dev/null && _log_error "unexpected active in ${_state_file}"
    fi
  else
    grep "; Activate: $_active" "${_key_file}" >/dev/null || _log_error "mismatch active comment in ${_key_file} (expected ${_active})"
    if [ "$_private" = "yes" ]; then
      grep "Activate: $_active" "${_private_file}" >/dev/null || _log_error "mismatch active in ${_private_file} (expected ${_active})"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Active: $_active" "${_state_file}" >/dev/null || _log_error "mismatch active in ${_state_file} (expected ${_active})"
    fi
  fi

  if [ "$_retired" = "none" ]; then
    grep "; Inactive:" "${_key_file}" >/dev/null && _log_error "unexpected retired comment in ${_key_file}"
    if [ "$_private" = "yes" ]; then
      grep "Inactive:" "${_private_file}" >/dev/null && _log_error "unexpected retired in ${_private_file}"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Retired: " "${_state_file}" >/dev/null && _log_error "unexpected retired in ${_state_file}"
    fi
  else
    grep "; Inactive: $_retired" "${_key_file}" >/dev/null || _log_error "mismatch retired comment in ${_key_file} (expected ${_retired})"
    if [ "$_private" = "yes" ]; then
      grep "Inactive: $_retired" "${_private_file}" >/dev/null || _log_error "mismatch retired in ${_private_file} (expected ${_retired})"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Retired: $_retired" "${_state_file}" >/dev/null || _log_error "mismatch retired in ${_state_file} (expected ${_retired})"
    fi
  fi

  if [ "$_revoked" = "none" ]; then
    grep "; Revoke:" "${_key_file}" >/dev/null && _log_error "unexpected revoked comment in ${_key_file}"
    if [ "$_private" = "yes" ]; then
      grep "Revoke:" "${_private_file}" >/dev/null && _log_error "unexpected revoked in ${_private_file}"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Revoked: " "${_state_file}" >/dev/null && _log_error "unexpected revoked in ${_state_file}"
    fi
  else
    grep "; Revoke: $_revoked" "${_key_file}" >/dev/null || _log_error "mismatch revoked comment in ${_key_file} (expected ${_revoked})"
    if [ "$_private" = "yes" ]; then
      grep "Revoke: $_revoked" "${_private_file}" >/dev/null || _log_error "mismatch revoked in ${_private_file} (expected ${_revoked})"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Revoked: $_revoked" "${_state_file}" >/dev/null || _log_error "mismatch revoked in ${_state_file} (expected ${_revoked})"
    fi
  fi

  if [ "$_removed" = "none" ]; then
    grep "; Delete:" "${_key_file}" >/dev/null && _log_error "unexpected removed comment in ${_key_file}"
    if [ "$_private" = "yes" ]; then
      grep "Delete:" "${_private_file}" >/dev/null && _log_error "unexpected removed in ${_private_file}"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Removed: " "${_state_file}" >/dev/null && _log_error "unexpected removed in ${_state_file}"
    fi
  else
    grep "; Delete: $_removed" "${_key_file}" >/dev/null || _log_error "mismatch removed comment in ${_key_file} (expected ${_removed})"
    if [ "$_private" = "yes" ]; then
      grep "Delete: $_removed" "${_private_file}" >/dev/null || _log_error "mismatch removed in ${_private_file} (expected ${_removed})"
    fi
    if [ "$_legacy" = "no" ]; then
      grep "Removed: $_removed" "${_state_file}" >/dev/null || _log_error "mismatch removed in ${_state_file} (expected ${_removed})"
    fi
  fi

  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

check_keytimes() {
  # The script relies on Python to set keytimes.
  if [ -x "$PYTHON" ]; then

    if [ "$(key_get KEY1 EXPECT)" = "yes" ]; then
      check_timingmetadata "KEY1"
    fi
    if [ "$(key_get KEY2 EXPECT)" = "yes" ]; then
      check_timingmetadata "KEY2"
    fi
    if [ "$(key_get KEY3 EXPECT)" = "yes" ]; then
      check_timingmetadata "KEY3"
    fi
    if [ "$(key_get KEY4 EXPECT)" = "yes" ]; then
      check_timingmetadata "KEY4"
    fi
  fi
}

# Check the key with key id $1 and see if it is unused.
# This requires environment variables to be set.
#
# This will set the following environment variables for testing:
# BASE_FILE="${_dir}/K${_zone}.+${_alg_numpad}+${_key_idpad}"
# KEY_FILE="${BASE_FILE}.key"
# PRIVATE_FILE="${BASE_FILE}.private"
# STATE_FILE="${BASE_FILE}.state"
# KEY_ID=$(echo $1 | sed 's/^0\{0,4\}//')
key_unused() {
  _dir="$DIR"
  _zone="$ZONE"
  _key_idpad="$1"
  _key_id=$(echo "$_key_idpad" | sed 's/^0\{0,4\}//')
  _alg_num="$2"
  _alg_numpad=$(printf "%03d" "$_alg_num")

  BASE_FILE="${_dir}/K${_zone}.+${_alg_numpad}+${_key_idpad}"
  KEY_FILE="${BASE_FILE}.key"
  PRIVATE_FILE="${BASE_FILE}.private"
  STATE_FILE="${BASE_FILE}.state"
  KEY_ID="${_key_id}"

  test $_log -eq 1 && echo_i "key unused $KEY_ID?"

  # Check file existence.
  [ -s "$KEY_FILE" ] || ret=1
  [ -s "$PRIVATE_FILE" ] || ret=1
  [ -s "$STATE_FILE" ] || ret=1
  [ "$ret" -eq 0 ] || return 0

  # Treat keys that have been removed from the zone as unused.
  _check_removed=1
  grep "; Created:" "$KEY_FILE" >created.key-${KEY_ID}.test${n} || _check_removed=0
  grep "; Delete:" "$KEY_FILE" >unused.key-${KEY_ID}.test${n} || _check_removed=0
  if [ "$_check_removed" -eq 1 ]; then
    _created=$(awk '{print $3}' <created.key-${KEY_ID}.test${n})
    _removed=$(awk '{print $3}' <unused.key-${KEY_ID}.test${n})
    [ "$_removed" -le "$_created" ] && return
  fi

  # If no timing metadata is set, this key is unused.
  grep "; Publish:" "$KEY_FILE" >/dev/null && _log_error "unexpected publish comment in $KEY_FILE"
  grep "; Activate:" "$KEY_FILE" >/dev/null && _log_error "unexpected active comment in $KEY_FILE"
  grep "; Inactive:" "$KEY_FILE" >/dev/null && _log_error "unexpected retired comment in $KEY_FILE"
  grep "; Revoke:" "$KEY_FILE" >/dev/null && _log_error "unexpected revoked comment in $KEY_FILE"
  grep "; Delete:" "$KEY_FILE" >/dev/null && _log_error "unexpected removed comment in $KEY_FILE"

  grep "Publish:" "$PRIVATE_FILE" >/dev/null && _log_error "unexpected publish in $PRIVATE_FILE"
  grep "Activate:" "$PRIVATE_FILE" >/dev/null && _log_error "unexpected active in $PRIVATE_FILE"
  grep "Inactive:" "$PRIVATE_FILE" >/dev/null && _log_error "unexpected retired in $PRIVATE_FILE"
  grep "Revoke:" "$PRIVATE_FILE" >/dev/null && _log_error "unexpected revoked in $PRIVATE_FILE"
  grep "Delete:" "$PRIVATE_FILE" >/dev/null && _log_error "unexpected removed in $PRIVATE_FILE"

  grep "Published: " "$STATE_FILE" >/dev/null && _log_error "unexpected publish in $STATE_FILE"
  grep "Active: " "$STATE_FILE" >/dev/null && _log_error "unexpected active in $STATE_FILE"
  grep "Retired: " "$STATE_FILE" >/dev/null && _log_error "unexpected retired in $STATE_FILE"
  grep "Revoked: " "$STATE_FILE" >/dev/null && _log_error "unexpected revoked in $STATE_FILE"
  grep "Removed: " "$STATE_FILE" >/dev/null && _log_error "unexpected removed in $STATE_FILE"

  return 0
}

# Test: dnssec-verify zone $1.
dnssec_verify() {
  n=$((n + 1))
  echo_i "dnssec-verify zone ${ZONE} ($n)"
  ret=0
  _dig_with_opts "$ZONE" "@${SERVER}" AXFR >dig.out.axfr.test$n || _log_error "dig ${ZONE} AXFR failed"
  $VERIFY -z -o "$ZONE" dig.out.axfr.test$n >verify.out.$ZONE.test$n || _log_error "dnssec verify zone $ZONE failed"
  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

# Wait for the zone to be signed.
# The apex NSEC record indicates that it is signed.
_wait_for_nsec() {
  _dig_with_opts "@${SERVER}" "$ZONE" NSEC >"dig.out.nsec.test$n" || return 1
  grep "NS SOA" "dig.out.nsec.test$n" >/dev/null || return 1
  grep "${ZONE}\..*IN.*RRSIG" "dig.out.nsec.test$n" >/dev/null || return 1
  return 0
}
wait_for_nsec() {
  n=$((n + 1))
  ret=0
  echo_i "wait for ${ZONE} to be signed ($n)"
  retry_quiet 10 _wait_for_nsec || _log_error "wait for ${ZONE} to be signed failed"
  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

check_numkeys() {
  _numkeys=$(get_keyids "$DIR" "$ZONE" | wc -l)
  test "$_numkeys" -eq "$NUM_KEYS" || return 1
  return 0
}

_check_keys() {
  ret=0
  _ret=0

  # Clear key ids.
  if [ "$1" != "keep" ]; then
    key_set KEY1 ID "no"
    key_set KEY2 ID "no"
    key_set KEY3 ID "no"
    key_set KEY4 ID "no"
  fi

  # Check key files.
  _ids=$(get_keyids "$DIR" "$ZONE")
  for _id in $_ids; do
    # There are multiple key files with the same algorithm.
    # Check them until a match is found.
    ret=0
    echo_i "check key id $_id"

    if [ "no" = "$(key_get KEY1 ID)" ] && [ "$(key_get KEY1 EXPECT)" = "yes" ]; then
      ret=0
      check_key "KEY1" "$_id"
      test "$ret" -eq 0 && key_save KEY1 && continue
    fi
    if [ "no" = "$(key_get KEY2 ID)" ] && [ "$(key_get KEY2 EXPECT)" = "yes" ]; then
      ret=0
      check_key "KEY2" "$_id"
      test "$ret" -eq 0 && key_save KEY2 && continue
    fi
    if [ "no" = "$(key_get KEY3 ID)" ] && [ "$(key_get KEY3 EXPECT)" = "yes" ]; then
      ret=0
      check_key "KEY3" "$_id"
      test "$ret" -eq 0 && key_save KEY3 && continue
    fi
    if [ "no" = "$(key_get KEY4 ID)" ] && [ "$(key_get KEY4 EXPECT)" = "yes" ]; then
      ret=0
      check_key "KEY4" "$_id"
      test "$ret" -eq 0 && key_save KEY4 && continue
    fi

    # This may be an unused key. Assume algorithm of KEY1.
    ret=0 && key_unused "$_id" "$(key_get KEY1 ALG_NUM)"
    test "$ret" -eq 0 && continue

    # If ret is still non-zero, none of the files matched.
    echo_i "failed"
    _ret=1
  done

  return $_ret
}

# Check keys for a configured zone. This verifies:
# 1. The right number of keys exist in the key pool ($1).
# 2. The right number of keys is active. Checks KEY1, KEY2, KEY3, and KEY4.
#
# It is expected that KEY1, KEY2, KEY3, and KEY4 arrays are set correctly.
# Found key identifiers are stored in the right key array.
# Keys are found if they are stored inside $DIR or in a subdirectory up to
# three levels deeper.
#
# If $1 is set, we keep keys that are already found and don't look for them
# again.
check_keys() {
  n=$((n + 1))
  echo_i "check keys are created for zone ${ZONE} ($n)"
  ret=0

  echo_i "check number of keys for zone ${ZONE} in dir ${DIR} ($n)"
  retry_quiet 10 check_numkeys || ret=1
  if [ $ret -ne 0 ]; then
    _numkeys=$(get_keyids "$DIR" "$ZONE" | wc -l)
    _log_error "bad number of key files ($_numkeys) for zone $ZONE (expected $NUM_KEYS)"
    status=$((status + ret))
  fi

  # Temporarily don't log errors because we are searching multiple files.
  disable_logerror

  retry_quiet 3 _check_keys $1 || ret=1
  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))

  # Turn error logs on again.
  enable_logerror

  ret=0
  if [ "$(key_get KEY1 EXPECT)" = "yes" ]; then
    echo_i "KEY1 ID $(key_get KEY1 ID) ALG $(key_get KEY1 ALG_STR)"
    test "no" = "$(key_get KEY1 ID)" && _log_error "No KEY1 found for zone ${ZONE}"
  fi
  if [ "$(key_get KEY2 EXPECT)" = "yes" ]; then
    echo_i "KEY2 ID $(key_get KEY2 ID) ALG $(key_get KEY2 ALG_STR)"
    test "no" = "$(key_get KEY2 ID)" && _log_error "No KEY2 found for zone ${ZONE}"
  fi
  if [ "$(key_get KEY3 EXPECT)" = "yes" ]; then
    echo_i "KEY3 ID $(key_get KEY3 ID) ALG $(key_get KEY3 ALG_STR)"
    test "no" = "$(key_get KEY3 ID)" && _log_error "No KEY3 found for zone ${ZONE}"
  fi
  if [ "$(key_get KEY4 EXPECT)" = "yes" ]; then
    echo_i "KEY4 ID $(key_get KEY4 ID) ALG $(key_get KEY4 ALG_STR)"
    test "no" = "$(key_get KEY4 ID)" && _log_error "No KEY4 found for zone ${ZONE}"
  fi
  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

# Call rndc dnssec -status on server $1 for zone $3 in view $4 with policy $2
# and check output. This is a loose verification, it just tests if the right
# policy name is returned, and if all expected keys are listed.  The rndc
# dnssec -status output also lists whether a key is published,
# used for signing, is retired, or is removed, and if not when
# it is scheduled to do so, and it shows the states for the various
# DNSSEC records.
check_dnssecstatus() {
  _server=$1
  _policy=$2
  _zone=$3
  _view=$4

  n=$((n + 1))
  echo_i "check rndc dnssec -status output for ${_zone} (policy: $_policy) ($n)"
  ret=0

  _rndccmd $_server dnssec -status $_zone in $_view >rndc.dnssec.status.out.$_zone.$n || _log_error "rndc dnssec -status zone ${_zone} failed"

  if [ "$_policy" = "none" ]; then
    grep "Zone does not have dnssec-policy" rndc.dnssec.status.out.$_zone.$n >/dev/null || log_error "bad dnssec status for unsigned zone ${_zone}"
  else
    grep "dnssec-policy: ${_policy}" rndc.dnssec.status.out.$_zone.$n >/dev/null || _log_error "bad dnssec status for signed zone ${_zone}"
    if [ "$(key_get KEY1 EXPECT)" = "yes" ]; then
      grep "key: $(key_get KEY1 ID)" rndc.dnssec.status.out.$_zone.$n >/dev/null || _log_error "missing key $(key_get KEY1 ID) from dnssec status"
    fi
    if [ "$(key_get KEY2 EXPECT)" = "yes" ]; then
      grep "key: $(key_get KEY2 ID)" rndc.dnssec.status.out.$_zone.$n >/dev/null || _log_error "missing key $(key_get KEY2 ID) from dnssec status"
    fi
    if [ "$(key_get KEY3 EXPECT)" = "yes" ]; then
      grep "key: $(key_get KEY3 ID)" rndc.dnssec.status.out.$_zone.$n >/dev/null || _log_error "missing key $(key_get KEY3 ID) from dnssec status"
    fi
    if [ "$(key_get KEY4 EXPECT)" = "yes" ]; then
      grep "key: $(key_get KEY4 ID)" rndc.dnssec.status.out.$_zone.$n >/dev/null || _log_error "missing key $(key_get KEY4 ID) from dnssec status"
    fi
  fi

  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

# Call rndc zonestatus on server $1 for zone $2 in view $3 and check output if
# inline-signing is enabled.
check_inlinesigning() {
  _server=$1
  _zone=$2
  _view=$3

  _rndccmd $_server zonestatus $_zone in $_view >rndc.zonestatus.out.$_zone.$n || return 1
  grep "inline signing: yes" rndc.zonestatus.out.$_zone.$n >/dev/null || return 1
}

# Call rndc zonestatus on server $1 for zone $2 in view $3 and check output if
# the zone is dynamic.
check_isdynamic() {
  _server=$1
  _zone=$2
  _view=$3

  _rndccmd $_server zonestatus $_zone in $_view >rndc.zonestatus.out.$_zone.$n || return 1
  grep "dynamic: yes" rndc.zonestatus.out.$_zone.$n >/dev/null || return 1
}

# Check if RRset of type $1 in file $2 is signed with the right keys.
# The right keys are the ones that expect a signature and matches the role $3.
_check_signatures() {
  _qtype=$1
  _file=$2
  _role=$3

  numsigs=0

  if [ "$_role" = "KSK" ]; then
    _expect_type=EXPECT_KRRSIG
  elif [ "$_role" = "ZSK" ]; then
    _expect_type=EXPECT_ZRRSIG
  fi

  if [ "$(key_get KEY1 "$_expect_type")" = "yes" ] && [ "$(key_get KEY1 "$_role")" = "yes" ]; then
    get_keys_which_signed "$_qtype" "$(key_get KEY1 ALG_NUM)" "$_file" | grep "^$(key_get KEY1 ID)$" >/dev/null || return 1
    numsigs=$((numsigs + 1))
  elif [ "$(key_get KEY1 EXPECT)" = "yes" ]; then
    get_keys_which_signed "$_qtype" "$(key_get KEY1 ALG_NUM)" "$_file" | grep "^$(key_get KEY1 ID)$" >/dev/null && return 1
  fi

  if [ "$(key_get KEY2 "$_expect_type")" = "yes" ] && [ "$(key_get KEY2 "$_role")" = "yes" ]; then
    get_keys_which_signed "$_qtype" "$(key_get KEY2 ALG_NUM)" "$_file" | grep "^$(key_get KEY2 ID)$" >/dev/null || return 1
    numsigs=$((numsigs + 1))
  elif [ "$(key_get KEY2 EXPECT)" = "yes" ]; then
    get_keys_which_signed "$_qtype" "$(key_get KEY2 ALG_NUM)" "$_file" | grep "^$(key_get KEY2 ID)$" >/dev/null && return 1
  fi

  if [ "$(key_get KEY3 "$_expect_type")" = "yes" ] && [ "$(key_get KEY3 "$_role")" = "yes" ]; then
    get_keys_which_signed "$_qtype" "$(key_get KEY3 ALG_NUM)" "$_file" | grep "^$(key_get KEY3 ID)$" >/dev/null || return 1
    numsigs=$((numsigs + 1))
  elif [ "$(key_get KEY3 EXPECT)" = "yes" ]; then
    get_keys_which_signed "$_qtype" "$(key_get KEY3 ALG_NUM)" "$_file" | grep "^$(key_get KEY3 ID)$" >/dev/null && return 1
  fi

  if [ "$(key_get KEY4 "$_expect_type")" = "yes" ] && [ "$(key_get KEY4 "$_role")" = "yes" ]; then
    get_keys_which_signed "$_qtype" "$(key_get KEY4 ALG_NUM)" "$_file" | grep "^$(key_get KEY4 ID)$" >/dev/null || return 1
    numsigs=$((numsigs + 1))
  elif [ "$(key_get KEY4 EXPECT)" = "yes" ]; then
    get_keys_which_signed "$_qtype" "$(key_get KEY4 ALG_NUM)" "$_file" | grep "^$(key_get KEY4 ID)$" >/dev/null && return 1
  fi

  lines=$(get_keys_which_signed "${_qtype}" "0" "${_file}" | wc -l)
  test "$lines" -eq "$numsigs" || echo_i "bad number of signatures for $_qtype (got $lines, expected $numsigs)"
  test "$lines" -eq "$numsigs" || return 1

  return 0
}
check_signatures() {
  retry_quiet 3 _check_signatures $1 $2 $3 || _log_error "RRset $1 in zone $ZONE incorrectly signed"
}

response_has_cds_for_key() {
  awk -v zone="${ZONE%%.}." \
    -v ttl="${DNSKEY_TTL}" \
    -v qtype="CDS" \
    -v keyid="$(key_get "${2}" ID)" \
    -v keyalg="$(key_get "${2}" ALG_NUM)" \
    -v hashalg="$1" \
    'BEGIN { ret=1; }
	     $1 == zone && $2 == ttl && $4 == qtype && $5 == keyid && $6 == keyalg && $7 == hashalg { ret=0; exit; }
	     END { exit ret; }' \
    "$3"
}

response_has_cdnskey_for_key() (

  awk -v zone="${ZONE%%.}." \
    -v ttl="${DNSKEY_TTL}" \
    -v qtype="CDNSKEY" \
    -v flags="$(key_get "${1}" FLAGS)" \
    -v keyalg="$(key_get "${1}" ALG_NUM)" \
    'BEGIN { ret=1; }
	     $1 == zone && $2 == ttl && $4 == qtype && $5 == flags && $7 == keyalg { ret=0; exit; }
	     END { exit ret; }' \
    "$2"
)

check_cds_digests() {
  if [ "$CDS_SHA256" = "yes" ]; then
    response_has_cds_for_key 2 $1 "${2}.cds" || _log_error "missing CDS 2 record in response for key $(key_get $1 ID)"
  else
    response_has_cds_for_key 2 $1 "${2}.cds" && _log_error "unexpected CDS 2 record in response for key $(key_get $1 ID)"
  fi

  if [ "$CDS_SHA384" = "yes" ]; then
    response_has_cds_for_key 4 $1 "${2}.cds" || _log_error "missing CDS 4 record in response for key $(key_get $1 ID)"
  else
    response_has_cds_for_key 4 $1 "${2}.cds" && _log_error "unexpected CDS 4 record in response for key $(key_get $1 ID)"
  fi

  if [ "$CDNSKEY" = "yes" ]; then
    response_has_cdnskey_for_key $1 "${2}.cdnskey" || _log_error "missing CDNSKEY record in response for key $(key_get $1 ID)"
  else
    response_has_cdnskey_for_key $1 "${2}.cdnskey" && _log_error "unexpected CDNSKEY record in response for key $(key_get $1 ID)"
  fi

  return 0
}

check_cds_digests_invert() {
  response_has_cds_for_key 2 $1 "${2}.cds" && _log_error "unexpected CDS 2 record in response for key $(key_get $1 ID)"
  response_has_cds_for_key 4 $1 "${2}.cds" && _log_error "unexpected CDS 4 record in response for key $(key_get $1 ID)"
  # The key should not have an associated CDNSKEY, but there may be
  # one for another key.  Since the CDNSKEY has no field for key
  # id, it is hard to check what key the CDNSKEY may belong to
  # so let's skip this check for now.

  return 0
}

# Test CDS and CDNSKEY publication.
check_cds() {

  n=$((n + 1))
  echo_i "check CDS and CDNSKEY rrset are signed correctly for zone ${ZONE} ($n)"
  ret=0

  _checksig=0

  _dig_with_opts "$ZONE" "@${SERVER}" "CDS" >"dig.out.$DIR.test$n.cds" || _log_error "dig ${ZONE} CDS failed"
  grep "status: NOERROR" "dig.out.$DIR.test$n.cds" >/dev/null || _log_error "mismatch status in DNS response"

  _dig_with_opts "$ZONE" "@${SERVER}" "CDNSKEY" >"dig.out.$DIR.test$n.cdnskey" || _log_error "dig ${ZONE} CDNSKEY failed"
  grep "status: NOERROR" "dig.out.$DIR.test$n.cdnskey" >/dev/null || _log_error "mismatch status in DNS response"

  if [ "$CDS_DELETE" = "no" ]; then
    grep "CDS.*0 0 0 00" "dig.out.$DIR.test$n.cds" >/dev/null && _log_error "unexpected CDS DELETE record in DNS response"
    grep "CDNSKEY.*0 3 0 AA==" "dig.out.$DIR.test$n.cdnskey" >/dev/null && _log_error "unexpected CDNSKEY DELETE record in DNS response"
  else
    grep "CDS.*0 0 0 00" "dig.out.$DIR.test$n.cds" >/dev/null || _log_error "missing CDS DELETE record in DNS response"
    grep "CDNSKEY.*0 3 0 AA==" "dig.out.$DIR.test$n.cdnskey" >/dev/null || _log_error "missing CDNSKEY DELETE record in DNS response"
    _checksig=1
  fi

  if [ "$(key_get KEY1 STATE_DS)" = "rumoured" ] || [ "$(key_get KEY1 STATE_DS)" = "omnipresent" ]; then
    check_cds_digests KEY1 "dig.out.$DIR.test$n"
    _checksig=1
  elif [ "$(key_get KEY1 EXPECT)" = "yes" ]; then
    check_cds_digests_invert KEY1 "dig.out.$DIR.test$n"
  fi

  if [ "$(key_get KEY2 STATE_DS)" = "rumoured" ] || [ "$(key_get KEY2 STATE_DS)" = "omnipresent" ]; then
    check_cds_digests KEY2 "dig.out.$DIR.test$n"
    _checksig=1
  elif [ "$(key_get KEY2 EXPECT)" = "yes" ]; then
    check_cds_digests_invert KEY2 "dig.out.$DIR.test$n"
  fi

  if [ "$(key_get KEY3 STATE_DS)" = "rumoured" ] || [ "$(key_get KEY3 STATE_DS)" = "omnipresent" ]; then
    check_cds_digests KEY3 "dig.out.$DIR.test$n"
    _checksig=1
  elif [ "$(key_get KEY3 EXPECT)" = "yes" ]; then
    check_cds_digests_invert KEY3 "dig.out.$DIR.test$n"
  fi

  if [ "$(key_get KEY4 STATE_DS)" = "rumoured" ] || [ "$(key_get KEY4 STATE_DS)" = "omnipresent" ]; then
    check_cds_digests KEY4 "dig.out.$DIR.test$n"
    _checksig=1
  elif [ "$(key_get KEY4 EXPECT)" = "yes" ]; then
    check_cds_digests_invert KEY4 "dig.out.$DIR.test$n"
  fi

  test "$_checksig" -eq 0 || check_signatures "CDS" "dig.out.$DIR.test$n.cds" "KSK"

  if [ "$CDNSKEY" = "yes" ]; then
    test "$_checksig" -eq 0 || check_signatures "CDNSKEY" "dig.out.$DIR.test$n.cdnskey" "KSK"
  fi

  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

_find_dnskey() {
  _owner="${ZONE}."
  _alg="$(key_get $1 ALG_NUM)"
  _flags="$(key_get $1 FLAGS)"
  _key_file="$(key_get $1 BASEFILE).key"

  awk '$1 == "'"$_owner"'" && $2 == "'"$KEYFILE_TTL"'" && $3 == "IN" && $4 == "DNSKEY" && $5 == "'"$_flags"'" && $6 == "3" && $7 == "'"$_alg"'" { print $8 }' <"$_key_file"
}

# Test DNSKEY query.
_check_apex_dnskey() {
  _dig_with_opts "$ZONE" "@${SERVER}" "DNSKEY" >"dig.out.$DIR.test$n" || return 1
  grep "status: NOERROR" "dig.out.$DIR.test$n" >/dev/null || return 1

  _checksig=0

  if [ "$(key_get KEY1 STATE_DNSKEY)" = "rumoured" ] || [ "$(key_get KEY1 STATE_DNSKEY)" = "omnipresent" ]; then
    _pubkey=$(_find_dnskey KEY1)
    test -z "$_pubkey" && return 1
    grep -F "$_pubkey" "dig.out.$DIR.test$n" >/dev/null || return 1
    _checksig=1
  elif [ "$(key_get KEY1 EXPECT)" = "yes" ]; then
    _pubkey=$(_find_dnskey KEY1)
    test -z "$_pubkey" && return 1
    grep -F "$_pubkey" "dig.out.$DIR.test$n" >/dev/null && return 1
  fi

  if [ "$(key_get KEY2 STATE_DNSKEY)" = "rumoured" ] || [ "$(key_get KEY2 STATE_DNSKEY)" = "omnipresent" ]; then
    _pubkey=$(_find_dnskey KEY2)
    test -z "$_pubkey" && return 1
    grep -F "$_pubkey" "dig.out.$DIR.test$n" >/dev/null || return 1
    _checksig=1
  elif [ "$(key_get KEY2 EXPECT)" = "yes" ]; then
    _pubkey=$(_find_dnskey KEY2)
    test -z "$_pubkey" && return 1
    grep -F "$_pubkey" "dig.out.$DIR.test$n" >/dev/null && return 1
  fi

  if [ "$(key_get KEY3 STATE_DNSKEY)" = "rumoured" ] || [ "$(key_get KEY3 STATE_DNSKEY)" = "omnipresent" ]; then
    _pubkey=$(_find_dnskey KEY3)
    test -z "$_pubkey" && return 1
    grep -F "$_pubkey" "dig.out.$DIR.test$n" >/dev/null || return 1
    _checksig=1
  elif [ "$(key_get KEY3 EXPECT)" = "yes" ]; then
    _pubkey=$(_find_dnskey KEY3)
    test -z "$_pubkey" && return 1
    grep -F "$_pubkey" "dig.out.$DIR.test$n" >/dev/null && return 1
  fi

  if [ "$(key_get KEY4 STATE_DNSKEY)" = "rumoured" ] || [ "$(key_get KEY4 STATE_DNSKEY)" = "omnipresent" ]; then
    _pubkey=$(_find_dnskey KEY4)
    test -z "$_pubkey" && return 1
    grep -F "$_pubkey" "dig.out.$DIR.test$n" >/dev/null || return 1
    _checksig=1
  elif [ "$(key_get KEY4 EXPECT)" = "yes" ]; then
    _pubkey=$(_find_dnskey KEY4)
    test -z "$_pubkey" && return 1
    grep -F "$_pubkey" "dig.out.$DIR.test$n" >/dev/null && return 1
  fi

  test "$_checksig" -eq 0 && return 0

  _check_signatures "DNSKEY" "dig.out.$DIR.test$n" "KSK" || return 1

  return 0
}

# Test the apex of a configured zone. This checks that the SOA and DNSKEY
# RRsets are signed correctly and with the appropriate keys.
check_apex() {

  # Test DNSKEY query.
  n=$((n + 1))
  echo_i "check DNSKEY rrset is signed correctly for zone ${ZONE} ($n)"
  ret=0
  retry_quiet 10 _check_apex_dnskey || ret=1
  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))

  # We retry the DNSKEY query for at most ten seconds to avoid test
  # failures due to timing issues. If the DNSKEY query check passes this
  # means the zone is resigned and further apex checks (SOA, CDS, CDNSKEY)
  # don't need to be retried quietly.

  # Test SOA query.
  n=$((n + 1))
  echo_i "check SOA rrset is signed correctly for zone ${ZONE} ($n)"
  ret=0
  _dig_with_opts "$ZONE" "@${SERVER}" "SOA" >"dig.out.$DIR.test$n" || _log_error "dig ${ZONE} SOA failed"
  grep "status: NOERROR" "dig.out.$DIR.test$n" >/dev/null || _log_error "mismatch status in DNS response"
  grep "${ZONE}\..*${DEFAULT_TTL}.*IN.*SOA.*" "dig.out.$DIR.test$n" >/dev/null || _log_error "missing SOA record in response"
  check_signatures "SOA" "dig.out.$DIR.test$n" "ZSK"
  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))

  # Test CDS and CDNSKEY publication.
  check_cds
}

# Test an RRset below the apex and verify it is signed correctly.
check_subdomain() {
  _qtype="A"
  n=$((n + 1))
  echo_i "check ${_qtype} a.${ZONE} rrset is signed correctly for zone ${ZONE} ($n)"
  ret=0
  _dig_with_opts "a.$ZONE" "@${SERVER}" $_qtype >"dig.out.$DIR.test$n" || _log_error "dig a.${ZONE} ${_qtype} failed"
  grep "status: NOERROR" "dig.out.$DIR.test$n" >/dev/null || _log_error "mismatch status in DNS response"
  grep "a.${ZONE}\..*${DEFAULT_TTL}.*IN.*${_qtype}.*10\.0\.0\.1" "dig.out.$DIR.test$n" >/dev/null || _log_error "missing a.${ZONE} ${_qtype} record in response"
  lines=$(get_keys_which_signed $_qtype 0 "dig.out.$DIR.test$n" | wc -l)
  check_signatures $_qtype "dig.out.$DIR.test$n" "ZSK"
  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

# Check if "CDS/CDNSKEY Published" is logged.
check_cdslog() {
  _dir=$1
  _zone=$2
  _key=$3

  _alg=$(key_get $_key ALG_STR)
  _id=$(key_get $_key ID)

  n=$((n + 1))
  echo_i "check CDS/CDNSKEY publication is logged in ${_dir}/named.run for key ${_zone}/${_alg}/${_id} ($n)"
  ret=0

  if [ "$CDS_SHA256" = "yes" ]; then
    grep "CDS (SHA-256) for key ${_zone}/${_alg}/${_id} is now published" "${_dir}/named.run" >/dev/null || ret=1
  fi
  if [ "$CDS_SHA384" = "yes" ]; then
    grep "CDS (SHA-384) for key ${_zone}/${_alg}/${_id} is now published" "${_dir}/named.run" >/dev/null || ret=1
  fi
  if [ "$CDNSKEY" = "yes" ]; then
    grep "CDNSKEY for key ${_zone}/${_alg}/${_id} is now published" "${_dir}/named.run" >/dev/null || ret=1
  fi

  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

# Tell named that the DS for the key in given zone has been seen in the
# parent (this does not actually has to be true, we just issue the command
# to make named believe it can continue with the rollover).
rndc_checkds() {
  _server=$1
  _dir=$2
  _key=$3
  _when=$4
  _what=$5
  _zone=$6
  _view=$7

  _keycmd=""
  if [ "${_key}" != "-" ]; then
    _keyid=$(key_get $_key ID)
    _keycmd=" -key ${_keyid}"
  fi

  _whencmd=""
  if [ "${_when}" != "now" ]; then
    _whencmd=" -when ${_when}"
  fi

  n=$((n + 1))
  echo_i "calling rndc dnssec -checkds${_keycmd}${_whencmd} ${_what} zone ${_zone} in ${_view} ($n)"
  ret=0

  _rndccmd $_server dnssec -checkds $_keycmd $_whencmd $_what $_zone in $_view >rndc.dnssec.checkds.out.$_zone.$n || _log_error "rndc dnssec -checkds${_keycmd}${_whencmd} ${_what} zone ${_zone} failed"

  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}

# Tell named to schedule a key rollover.
rndc_rollover() {
  _server=$1
  _dir=$2
  _keyid=$3
  _when=$4
  _zone=$5
  _view=$6

  _whencmd=""
  if [ "${_when}" != "now" ]; then
    _whencmd="-when ${_when}"
  fi

  n=$((n + 1))
  echo_i "calling rndc dnssec -rollover key ${_keyid} ${_whencmd} zone ${_zone} ($n)"
  ret=0

  _rndccmd $_server dnssec -rollover -key $_keyid $_whencmd $_zone in $_view >rndc.dnssec.rollover.out.$_zone.$n || _log_error "rndc dnssec -rollover (key ${_keyid} when ${_when}) zone ${_zone} failed"

  test "$ret" -eq 0 || echo_i "failed"
  status=$((status + ret))
}