#!/bin/bash
# Begin make-ca.sh
# Script to populate OpenSSL's CApath from a bundle of PEM formatted CAs
#
# The file certdata.txt must exist in the local directory
# Version number is obtained from the version of the data.
#
# Authors: DJ Lucas
#          Bruce Dubbs

certdata="certdata.txt"

if [ ! -r $certdata ]; then
  echo "$certdata must be in the local directory"
  exit 1
fi

REVISION=$(grep CVS_ID $certdata | cut -f4 -d'$')

if [ -z "${REVISION}" ]; then
  echo "$certfile has no 'Revision' in CVS_ID"
  exit 1
fi

VERSION=$(echo $REVISION | cut -f2 -d" ")

TEMPDIR=$(mktemp -d)
TRUSTATTRIBUTES="CKA_TRUST_SERVER_AUTH"
BUNDLE="BLFS-ca-bundle-${VERSION}.crt"
CONVERTSCRIPT="make-cert.pl"
SSLDIR="/etc/ssl"

mkdir "${TEMPDIR}/certs"

# Get a list of staring lines for each cert
CERTBEGINLIST=$(grep -n "^# Certificate" "${certdata}" | cut -d ":" -f1)

# Get a list of ending lines for each cert
CERTENDLIST=`grep -n "^CKA_TRUST_STEP_UP_APPROVED" "${certdata}" | cut -d ":" -f 1`

# Start a loop
for certbegin in ${CERTBEGINLIST}; do
  for certend in ${CERTENDLIST}; do
    if test "${certend}" -gt "${certbegin}"; then
      break
    fi
  done

  # Dump to a temp file with the name of the file as the beginning line number
  sed -n "${certbegin},${certend}p" "${certdata}" > "${TEMPDIR}/certs/${certbegin}.tmp"
done

unset CERTBEGINLIST CERTDATA CERTENDLIST certebegin certend

mkdir -p certs
rm certs/*      # Make sure the directory is clean

for tempfile in ${TEMPDIR}/certs/*.tmp; do
  # Make sure that the cert is trusted...
  grep "CKT_NSS_TRUST_UNKNOWN" "${tempfile}" > /dev/null
  if test "${?}" = "0"; then
    # Throw a meaningful error and remove the file
    cp "${tempfile}" tempfile.cer
    "${CONVERTSCRIPT}" > tempfile.crt
    keyhash=$(openssl x509 -noout -in tempfile.crt -hash)
    echo "Certificate with ${keyhash} has unknown trust value!  Removing..."
    rm -f tempfile.cer tempfile.crt "${tempfile}"
    continue
  fi

  grep "CKT_NSS_NOT_TRUSTED" "${tempfile}" > /dev/null
  if test "${?}" = "0"; then
    # Throw a meaningful error and remove the file
    cp "${tempfile}" tempfile.cer
    "${CONVERTSCRIPT}" > tempfile.crt
    keyhash=$(openssl x509 -noout -in tempfile.crt -hash)
    echo "Certificate with ${keyhash} is not trusted!  Removing..."
    rm -f tempfile.cer tempfile.crt "${tempfile}"
    continue
  fi

  
  # If execution made it to here in the loop, the temp cert is trusted
  # Find the cert data and generate a cert file for it

  cp "${tempfile}" tempfile.cer
  "${CONVERTSCRIPT}" > tempfile.crt
  keyhash=$(openssl x509 -noout -in tempfile.crt -hash)
  mv tempfile.crt "certs/${keyhash}.pem"
  rm -f tempfile.cer "${tempfile}"
  echo "Created ${keyhash}.pem"
done

# Finally, generate the bundle and clean up.
cat certs/*.pem >  ${BUNDLE}
rm -r "${TEMPDIR}"