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#!/usr/bin/bash
# Usage: request_cert.sh <filename.json>
# Sample JSON:
# {
# "common_name": "",
# "alt_names": "",
# "ip_sans": "212.12.255.3,212.12.255.4,213.12.255.3,213.12.255.4",
# "ttl": "180d"
# }
#
# Simple Usage: request_cert.sh -s <fqdn>
#
set -eu
if [ -z "${VAULT_TOKEN-}" ]; then
read -p USER: LDAPUSER
read -s -p PASSWORD: LPDAPASSWD
login_request_data=$(jq -c -n --arg password "$LDAPUSER" '{$password}'
login_response_data=$(curl -Ssf -H "Content-Type: application/json" -d "$login_request_data" https://vault.dings:8199/v1/auth/ldap/login/$LDAPUSER)
VAULT_TOKEN=$(echo "$login_response_data" | jq -r ".auth.client_token")
echo $VAULT_TOKEN
fi
# These two extended regular expression are matching
# RFC952, B. Lexical grammar, <name> and <hname>, respectively
readonly RFC952_name_ERE='[0-9A-Za-z]([0-9A-Za-z-]*[0-9A-Za-z])?'
readonly RFC952_hname_ERE="$name_ERE(\\.$name_ERE)*"
# usage: is_hostname STRING
# Check if STRING is a valid host name per RFC952
is_hostname() {
echo "$1" | grep -Eq "^$RFC952_hname_ERE\$"
}
if [ $# = 2 ] && [ "$1" = -s ]; then
CN=$2
if ! is_hostname "$CN"; then
echo "error: specified FQDN is not a valid hostname: $CN" >&2
exit 1
fi
cert_request_data=$(jq -c -n --arg common_name "$CN" --arg ttl 90d '{$common_name,$ttl}'
elif [ $# = 1 ]; then
CN=$( cat $1 | jq -r ".common_name" )
if ! is_hostname "$CN"; then
echo "error: common_name in $1 is not a valid hostname: $CN" >&2
exit 1
fi
cert_request_data=$(cat "$1")
else
echo "USAGE: $0 -s <fqdn>|<filename>"
exit 1
fi
if [ -d $CN ]; then
rm -r $CN
fi
mkdir $CN
cert_response_data=$(echo "$cert_request_data" | curl -Ssf -H "X-Vault-Token: $VAULT_TOKEN" -d @- https://vault.dings:8200/v1/pki_rz_q-ca_2021aa/issue/rz-drv)
echo "$cert_response_data" > $CN/$CN.json
echo "$cert_response_data" | jq -r '.data.certificate' > $CN/$CN.cer
echo "$cert_response_data" | jq -r '.data.private_key' > $CN/$CN.key
echo "$cert_response_data" | jq -r '.data.ca_chain|join("\n")' > $CN/$CN.ca_chain
cat $CN/$CN.cer $CN/$CN.ca_chain > $CN/$CN.cer_with_ca_chain
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