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#!/bin/bash
# Build a new PKI which is rooted on an intermediate certificate generated
# by ./build-inter or ./pkitool --inter from a parent PKI. The new PKI should
# have independent vars settings, and must use a different KEY_DIR directory
# from the parent. This tool can be used to generate arbitrary depth
# certificate chains.
#
# To build an intermediate CA, follow the same steps for a regular PKI but
# replace ./build-key or ./pkitool --initca with this script.
# The EXPORT_CA file will contain the CA certificate chain and should be
# referenced by the OpenVPN "ca" directive in config files. The ca.crt file
# will only contain the local intermediate CA -- it's needed by the easy-rsa
# scripts but not by OpenVPN directly.
EXPORT_CA="export-ca.crt"
if [ $# -ne 2 ]; then
echo "usage: $0 <parent-key-dir> <common-name>"
echo "parent-key-dir: the KEY_DIR directory of the parent PKI"
echo "common-name: the common name of the intermediate certificate in the parent PKI"
exit 1;
fi
if [ "$KEY_DIR" ]; then
cp "$1/$2.crt" "$KEY_DIR/ca.crt"
cp "$1/$2.key" "$KEY_DIR/ca.key"
if [ -e "$1/$EXPORT_CA" ]; then
PARENT_CA="$1/$EXPORT_CA"
else
PARENT_CA="$1/ca.crt"
fi
cp "$PARENT_CA" "$KEY_DIR/$EXPORT_CA"
cat "$KEY_DIR/ca.crt" >> "$KEY_DIR/$EXPORT_CA"
else
echo 'Please source the vars script first (i.e. "source ./vars")'
echo 'Make sure you have edited it to reflect your configuration.'
fi
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