cipherscan/top1m/make_ca_trusted.sh

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#!/bin/bash
if [[ ${1,,} == "-h" ]] || [[ ${1,,} == "-help" ]] || \
[[ ${1,,} == "--help" ]]; then
echo "Usage: $0 [dir_name]"
echo "Convert the system default trust store into an OpenSSL -CApath"
echo "compatible dir"
echo
echo "dir_name - name of the directory in which the certificates will be"
echo " placed, \`ca_trusted' by default"
exit 0
fi
DIR="${1:-ca_trusted}"
# sanity check the target directory
if [[ -e $DIR ]] && [[ ! -d $DIR ]]; then
echo "$DIR must either not exist or be a directory!" >&2
exit 1
fi
# prepare directory
if [[ ! -e $DIR ]]; then
mkdir "$DIR"
if [ $? -ne 0 ]; then
echo "mkdir failed, check your privileges" >&2
return 1
fi
fi
pushd "$DIR" >/dev/null
# search for trust anchors
for f in "${CACERTS}" \
/etc/pki/tls/certs/ca-bundle.crt \
/etc/ssl/certs/ca-certificates.crt \
"$(dirname $0)/../ca-bundle.crt" \
"$(dirname $0)/../../ca-bundle.crt"; do
if [ -e "$f" ]; then
CACERTS="$f"
break
fi
done
if [ ! -e "$CACERTS" ]; then
echo "No CA trust root store found" >&2
return 1
fi
# search for openssl
for f in "$(dirname $0)/../openssl" \
"$(dirname $0)/../../openssl" \
"$(which openssl 2>/dev/null)"; do
if [ -x "$f" ]; then
OPENSSL="$f"
break
fi
done
if [ ! -x "$OPENSSL" ]; then
echo "openssl not found!" >&2
return 1
fi
# split the file with all CA certs into single certs
awk '
split_after == 1 {n++;split_after=0}
/-----END CERTIFICATE-----/ {split_after=1}
{print > ".tmp.cert" n ".pem"}' < "$CACERTS"
# rename the files to their sha256 hashes
for file in .tmp.cert*.pem; do
f_hash=($(${OPENSSL} x509 -in "${file}" -outform der 2>/dev/null | \
${OPENSSL} dgst -r -sha256 2>/dev/null))
f_name="${f_hash[0]}.pem"
mv ${file} ${f_name}
done
# create links that make the directory into -CApath compatible dir
for file in *.pem; do
h=$(${OPENSSL} x509 -in "$file" -noout -hash 2>/dev/null)
for ((num=0; num<=100; num++)); do
if [[ ${h}.${num} -ef ${file} ]]; then
# file already linked, skip
break
fi
if [[ ! -e ${h}.${num} ]]; then
ln -s "${file}" "${h}.${num}"
break
fi
done
done
popd >/dev/null