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#! /bin/bash
#
# Copyright (c) 2016 Viktor Dukhovni <openssl-users@dukhovni.org>.
# All rights reserved.
#
# Licensed under the terms of the Postfix SECURE MAILER license
# included with the Postfix source code.
#
# This file is dual-licensed and is also available under other terms.
# Please contact the author.
# 100 years should be enough for now
if [ -z "$DAYS" ]; then
DAYS=36525
fi
if [ -z "$OPENSSL_SIGALG" ]; then
OPENSSL_SIGALG=sha256
fi
case ${OPENSSL_SIGALG} in
null) dopts=();;
*) dopts=(-"${OPENSSL_SIGALG}");;
esac
if [ -z "$REQMASK" ]; then
REQMASK=utf8only
fi
stderr_onerror() {
(
err=$("$@" >&3 2>&1) || {
printf "%s\n" "$err" >&2
exit 1
}
) 3>&1
}
key() {
local key=$1; shift
local alg=rsa
if [ -n "$OPENSSL_KEYALG" ]; then
alg=$OPENSSL_KEYALG
fi
local bits=2048
if [ -n "$OPENSSL_KEYBITS" ]; then
bits=$OPENSSL_KEYBITS
fi
if [ ! -f "${key}.pem" ]; then
args=(-algorithm "$alg")
case $alg in
rsa) args=("${args[@]}" -pkeyopt rsa_keygen_bits:$bits );;
ec) args=("${args[@]}" -pkeyopt "ec_paramgen_curve:$bits")
args=("${args[@]}" -pkeyopt ec_param_enc:named_curve);;
dsa) args=(-paramfile "$bits");;
ed25519) ;;
ed448) ;;
*) printf "Unsupported key algorithm: %s\n" "$alg" >&2; return 1;;
esac
stderr_onerror \
openssl genpkey "${args[@]}" -out "${key}.pem"
fi
}
# Usage: $0 req keyname dn1 dn2 ...
req() {
local key=$1; shift
key "$key"
local errs
stderr_onerror \
openssl req "${dopts[@]}" -new -key "${key}.pem" \
-config <(printf "string_mask=%s\n[req]\n%s\n%s\n[dn]\n" \
"$REQMASK" "prompt = no" "distinguished_name = dn"
for dn in "$@"; do echo "$dn"; done)
}
req_nocn() {
local key=$1; shift
key "$key"
stderr_onerror \
openssl req "${dopts[@]}" -new -subj / -key "${key}.pem" \
-config <(printf "[req]\n%s\n[dn]\nCN_default =\n" \
"distinguished_name = dn")
}
cert() {
local cert=$1; shift
local exts=$1; shift
stderr_onerror \
openssl x509 "${dopts[@]}" -req -out "${cert}.pem" \
-extfile <(printf "%s\n" "$exts") "$@"
}
genroot() {
local cn=$1; shift
local key=$1; shift
local cert=$1; shift
local skid="subjectKeyIdentifier = hash"
local akid="authorityKeyIdentifier = keyid"
exts=$(printf "%s\n%s\n%s\n" "$skid" "$akid" "basicConstraints = critical,CA:true")
for eku in "$@"
do
exts=$(printf "%s\nextendedKeyUsage = %s\n" "$exts" "$eku")
done
csr=$(req "$key" "CN = $cn") || return 1
echo "$csr" |
cert "$cert" "$exts" -signkey "${key}.pem" -set_serial 1 -days "${DAYS}"
}
genca() {
local cn=$1; shift
local key=$1; shift
local cert=$1; shift
local cakey=$1; shift
local cacert=$1; shift
local skid="subjectKeyIdentifier = hash"
local akid="authorityKeyIdentifier = keyid"
exts=$(printf "%s\n%s\n%s\n" "$skid" "$akid" "basicConstraints = critical,CA:true")
for eku in "$@"
do
exts=$(printf "%s\nextendedKeyUsage = %s\n" "$exts" "$eku")
done
if [ -n "$NC" ]; then
exts=$(printf "%s\nnameConstraints = %s\n" "$exts" "$NC")
fi
csr=$(req "$key" "CN = $cn") || return 1
echo "$csr" |
cert "$cert" "$exts" -CA "${cacert}.pem" -CAkey "${cakey}.pem" \
-set_serial 2 -days "${DAYS}"
}
gen_nonbc_ca() {
local cn=$1; shift
local key=$1; shift
local cert=$1; shift
local cakey=$1; shift
local cacert=$1; shift
local skid="subjectKeyIdentifier = hash"
local akid="authorityKeyIdentifier = keyid"
exts=$(printf "%s\n%s\n%s\n" "$skid" "$akid")
exts=$(printf "%s\nkeyUsage = %s\n" "$exts" "keyCertSign, cRLSign")
for eku in "$@"
do
exts=$(printf "%s\nextendedKeyUsage = %s\n" "$exts" "$eku")
done
csr=$(req "$key" "CN = $cn") || return 1
echo "$csr" |
cert "$cert" "$exts" -CA "${cacert}.pem" -CAkey "${cakey}.pem" \
-set_serial 2 -days "${DAYS}"
}
# Usage: $0 genpc keyname certname eekeyname eecertname pcext1 pcext2 ...
#
# Note: takes csr on stdin, so must be used with $0 req like this:
#
# $0 req keyname dn | $0 genpc keyname certname eekeyname eecertname pcext ...
genpc() {
local key=$1; shift
local cert=$1; shift
local cakey=$1; shift
local ca=$1; shift
exts=$(printf "%s\n%s\n%s\n%s\n" \
"subjectKeyIdentifier = hash" \
"authorityKeyIdentifier = keyid, issuer:always" \
"basicConstraints = CA:false" \
"proxyCertInfo = critical, @pcexts";
echo "[pcexts]";
for x in "$@"; do echo $x; done)
cert "$cert" "$exts" -CA "${ca}.pem" -CAkey "${cakey}.pem" \
-set_serial 2 -days "${DAYS}"
}
# Usage: $0 geneealt keyname certname eekeyname eecertname alt1 alt2 ...
#
# Note: takes csr on stdin, so must be used with $0 req like this:
#
# $0 req keyname dn | $0 geneealt keyname certname eekeyname eecertname alt ...
geneealt() {
local key=$1; shift
local cert=$1; shift
local cakey=$1; shift
local ca=$1; shift
exts=$(printf "%s\n%s\n%s\n%s\n" \
"subjectKeyIdentifier = hash" \
"authorityKeyIdentifier = keyid" \
"basicConstraints = CA:false" \
"subjectAltName = @alts";
echo "[alts]";
for x in "$@"; do echo $x; done)
cert "$cert" "$exts" -CA "${ca}.pem" -CAkey "${cakey}.pem" \
-set_serial 2 -days "${DAYS}"
}
genee() {
local OPTIND=1
local purpose=serverAuth
while getopts p: o
do
case $o in
p) purpose="$OPTARG";;
*) echo "Usage: $0 genee [-p EKU] cn keyname certname cakeyname cacertname" >&2
return 1;;
esac
done
shift $((OPTIND - 1))
local cn=$1; shift
local key=$1; shift
local cert=$1; shift
local cakey=$1; shift
local ca=$1; shift
exts=$(printf "%s\n%s\n%s\n%s\n%s\n[alts]\n%s\n" \
"subjectKeyIdentifier = hash" \
"authorityKeyIdentifier = keyid, issuer" \
"basicConstraints = CA:false" \
"extendedKeyUsage = $purpose" \
"subjectAltName = @alts" "DNS=${cn}")
csr=$(req "$key" "CN = $cn") || return 1
echo "$csr" |
cert "$cert" "$exts" -CA "${ca}.pem" -CAkey "${cakey}.pem" \
-set_serial 2 -days "${DAYS}" "$@"
}
genss() {
local cn=$1; shift
local key=$1; shift
local cert=$1; shift
exts=$(printf "%s\n%s\n%s\n%s\n%s\n[alts]\n%s\n" \
"subjectKeyIdentifier = hash" \
"authorityKeyIdentifier = keyid, issuer" \
"basicConstraints = CA:false" \
"extendedKeyUsage = serverAuth" \
"subjectAltName = @alts" "DNS=${cn}")
csr=$(req "$key" "CN = $cn") || return 1
echo "$csr" |
cert "$cert" "$exts" -signkey "${key}.pem" \
-set_serial 1 -days "${DAYS}" "$@"
}
gennocn() {
local key=$1; shift
local cert=$1; shift
csr=$(req_nocn "$key") || return 1
echo "$csr" |
cert "$cert" "" -signkey "${key}.pem" -set_serial 1 -days -1 "$@"
}
"$@"
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