私的な技術メモ

最近になって、HTTPS のテストをする機会があり、有料証明書を買うほど金と暇がなかったので、 OpenSSL に付属している CA.sh スクリプトをカスタマイズして、自前のサーバ証明書を作成した

その時のスクリプトと、設定ファイルをメモ代わりにあげておく

CA.sh

if [ -z "$OPENSSL" ]; then OPENSSL=openssl; fi

ROOT="$HOME/CA"
SSLEAY_CONFIG="-config $HOME/CA.cnf"
DAYS="-days 365" # 365 day
CADAYS="-days 3650" # 10 years
REQ="$OPENSSL req $SSLEAY_CONFIG"
CA="$OPENSSL ca $SSLEAY_CONFIG"
VERIFY="$OPENSSL verify"
X509="$OPENSSL x509"
RSA="$OPENSSL rsa"

CATOP="$ROOT"
CAKEY=cakey.pem
CAREQ=careq.pem
CACERT=cacert.pem

if [ -d $CATOP/tmp ]; then
cd $CATOP
fi

for i
do
case $i in
-\?|-h|-help)
echo "usage: CA -newcert|-newreq|-newca|-sign|-verify|-revoke|-rename" >&2
exit 0
;;
-newcert)
# create a certificate
$REQ -new -x509 -keyout newkey.pem -out newcert.pem $DAYS
RET=$?
echo "Certificate is in newcert.pem, private key is in newkey.pem"
;;
-newreq)
# create a certificate request
$REQ -new -keyout newkey.pem -out newreq.pem $DAYS
RET=$?
echo "Request is in newreq.pem, private key is in newkey.pem"
;;
-newca)
# if explicitly asked for or it doesn't exist then setup the directory
# structure that Eric likes to manage things
NEW="1"
if [ "$NEW" -o ! -f ${CATOP}/serial ]; then
# create the directory hierarchy
mkdir ${CATOP}
mkdir ${CATOP}/certs
mkdir ${CATOP}/crl
mkdir ${CATOP}/newcerts
mkdir ${CATOP}/private
mkdir ${CATOP}/tmp
echo "00" > ${CATOP}/serial
echo "00" > ${CATOP}/crlnumber
touch ${CATOP}/index.txt
fi
if [ ! -f ${CATOP}/private/$CAKEY ]; then
echo "CA certificate filename (or enter to create)"
read FILE

# ask user for existing CA certificate
if [ "$FILE" ]; then
cp $FILE ${CATOP}/private/$CAKEY
RET=$?
else
echo "Making CA certificate ..."
$REQ -new -keyout ${CATOP}/private/$CAKEY \
-out ${CATOP}/$CAREQ
$CA -out ${CATOP}/$CACERT $CADAYS -batch -extensions v3_ca \
-keyfile ${CATOP}/private/$CAKEY -selfsign \
-infiles ${CATOP}/$CAREQ
RET=$?
fi
fi
;;
-xsign)
$CA -policy policy_anything -infiles newreq.pem
RET=$?
;;
-sign|-signreq)
$CA -policy policy_anything -out newcert.pem -infiles newreq.pem
RET=$?
cat newcert.pem
echo "Signed certificate is in newcert.pem"
;;
-signcert)
echo "Cert passphrase will be requested twice - bug?"
$X509 -x509toreq -in newreq.pem -signkey newreq.pem -out tmp.pem
$CA -policy policy_anything -out newcert.pem -infiles tmp.pem
cat newcert.pem
echo "Signed certificate is in newcert.pem"
;;
-verify)
shift
if [ -z "$1" ]; then
$VERIFY -CAfile $CATOP/$CACERT newcert.pem
RET=$?
else
for j
do
$VERIFY -CAfile $CATOP/$CACERT $j
if [ $? != 0 ]; then
RET=$?
fi
done
fi
exit 0
;;
-revoke)
shift
if [ -z "$1" ]; then
echo "No certificate"
else
$CA -revoke $1 -out crl/crl.pem
fi
exit 0
;;
-rename)
shift
if [ -z "$1" ]; then
echo "No name to change"
else
if [ -f newcert.pem ]; then
mv newcert.pem certs/$1.crt
fi
if [ -f newkey.pem ]; then
mv newkey.pem certs/$1.key
$RSA -in certs/$1.key -out certs/$1-nopass.key
fi
fi
exit 0
;;
*)
echo "Unknown arg $i";
exit 1
;;
esac
done
exit $RET

CA.cnf

#
# OpenSSL example configuration file.
# This is mostly being used for generation of certificate requests.
#

# This definition stops the following lines choking if HOME isn't
# defined.
#HOME = .
RANDFILE = $ENV::HOME/.rnd
#RANDFILE = /home/norish/.rnd

# Uncomment out to enable OpenSSL configuration see config(3)
# openssl_conf = openssl_init

# To use this configuration file with the "-extfile" option of the
# "openssl x509" utility, name here the section containing the
# X.509v3 extensions to use:
# extensions =
# (Alternatively, use a configuration file that has only
# X.509v3 extensions in its main [= default] section.)

[openssl_init]
# Extra OBJECT IDENTIFIER info:
oid_section = new_oids
alg_section = algs

[ new_oids ]

# We can add new OIDs in here for use by any config aware application
# Add a simple OID like this:
# shortname=Long Object Identifier Name, 1.2.3.4
# Or use config file substitution like this:
# testoid2=OID2 LONG NAME, ${testoid1}.5.6, OTHER OID

[ algs ]
# Algorithm configuration options. Currently just fips_mode
fips_mode = no

####################################################################
[ ca ]
default_ca = CA_default # The default ca section

####################################################################
[ CA_default ]

dir = /home/norish/CA # Where everything is kept
certs = $dir/certs # Where the issued certs are kept
crl_dir = $dir/crl # Where the issued crl are kept
database = $dir/index.txt # database index file.
#unique_subject = no # Set to 'no' to allow creation of
# several ctificates with same subject.
new_certs_dir = $dir/newcerts # default place for new certs.

certificate = $dir/cacert.pem # The CA certificate
serial = $dir/serial # The current serial number
crlnumber = $dir/crlnumber # the current crl number
# must be commented out to leave a V1 CRL
crl = $dir/crl.pem # The current CRL
private_key = $dir/private/cakey.pem# The private key
RANDFILE = $dir/private/.rand # private random number file

x509_extensions = usr_cert # The extentions to add to the cert
#x509_extensions = v3_ca # The extentions to add to the cert

# Comment out the following two lines for the "traditional"
# (and highly broken) format.
name_opt = ca_default # Subject Name options
cert_opt = ca_default # Certificate field options

# Extension copying option: use with caution.
# copy_extensions = copy

# Extensions to add to a CRL. Note: Netscape communicator chokes on V2 CRLs
# so this is commented out by default to leave a V1 CRL.
# crlnumber must also be commented out to leave a V1 CRL.
# crl_extensions = crl_ext

default_days = 365 # how long to certify for
default_crl_days= 30 # how long before next CRL
default_md = sha1 # which md to use.
preserve = no # keep passed DN ordering

# A few difference way of specifying how similar the request should look
# For type CA, the listed attributes must be the same, and the optional
# and supplied fields are just that :-)
policy = policy_match

# For the CA policy
[ policy_match ]
countryName = match
stateOrProvinceName = match
organizationName = match
organizationalUnitName = optional
commonName = supplied
emailAddress = optional

# For the 'anything' policy
# At this point in time, you must list all acceptable 'object'
# types.
[ policy_anything ]
countryName = optional
stateOrProvinceName = optional
localityName = optional
organizationName = optional
organizationalUnitName = optional
commonName = supplied
emailAddress = optional

####################################################################
[ req ]
default_bits = 2048
default_md = sha1
default_keyfile = privkey.pem
distinguished_name = req_distinguished_name
attributes = req_attributes
x509_extensions = v3_req # The extentions to add to the self signed cert

# Passwords for private keys if not present they will be prompted for
# input_password = secret
# output_password = secret

# This sets a mask for permitted string types. There are several options.
# default: PrintableString, T61String, BMPString.
# pkix : PrintableString, BMPString.
# utf8only: only UTF8Strings.
# nombstr : PrintableString, T61String (no BMPStrings or UTF8Strings).
# MASK:XXXX a literal mask value.
# WARNING: current versions of Netscape crash on BMPStrings or UTF8Strings
# so use this option with caution!
# we use PrintableString+UTF8String mask so if pure ASCII texts are used
# the resulting certificates are compatible with Netscape
string_mask = MASK:0x2002

# req_extensions = v3_req # The extensions to add to a certificate request

[ req_distinguished_name ]
countryName = Country Name (2 letter code)
countryName_default = JP
countryName_min = 2
countryName_max = 2

stateOrProvinceName = State or Province Name (full name)
stateOrProvinceName_default = Toshima-Ku

localityName = Locality Name (eg, city)
localityName_default = Tokyo

0.organizationName = Organization Name (eg, company)
0.organizationName_default = Office Creative Ship

# we can do this but it is not needed normally :-)
#1.organizationName = Second Organization Name (eg, company)
#1.organizationName_default = World Wide Web Pty Ltd

organizationalUnitName = Organizational Unit Name (eg, section)
organizationalUnitName_default = CA Devision

commonName = Common Name (eg, your name or your server\'s hostname)
commonName_max = 64

emailAddress = Email Address
emailAddress_max = 64

# SET-ex3 = SET extension number 3

[ req_attributes ]
challengePassword = A challenge password
challengePassword_min = 4
challengePassword_max = 20

unstructuredName = An optional company name

[ usr_cert ]

# These extensions are added when 'ca' signs a request.

# This goes against PKIX guidelines but some CAs do it and some software
# requires this to avoid interpreting an end user certificate as a CA.

basicConstraints=CA:FALSE

# Here are some examples of the usage of nsCertType. If it is omitted
# the certificate can be used for anything *except* object signing.

# This is OK for an SSL server.
nsCertType = server

# For an object signing certificate this would be used.
# nsCertType = objsign

# For normal client use this is typical
#nsCertType = client, email

# and for everything including object signing:
# nsCertType = client, email, objsign

# This is typical in keyUsage for a client certificate.
# keyUsage = nonRepudiation, digitalSignature, keyEncipherment

# This will be displayed in Netscape's comment listbox.
nsComment = "OpenSSL Generated Certificate"

# PKIX recommendations harmless if included in all certificates.
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid,issuer

# This stuff is for subjectAltName and issuerAltname.
# Import the email address.
# subjectAltName=email:copy
# An alternative to produce certificates that aren't
# deprecated according to PKIX.
# subjectAltName=email:move

# Copy subject details
# issuerAltName=issuer:copy

#nsCaRevocationUrl = http://www.domain.dom/ca-crl.pem
#nsBaseUrl
#nsRevocationUrl
#nsRenewalUrl
#nsCaPolicyUrl
#nsSslServerName

[ v3_req ]

# Extensions to add to a certificate request

basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment

[ v3_ca ]

# Extensions for a typical CA

# PKIX recommendation.

subjectKeyIdentifier=hash

authorityKeyIdentifier=keyid:always,issuer:always

# This is what PKIX recommends but some broken software chokes on critical
# extensions.
#basicConstraints = critical,CA:true
# So we do this instead.
basicConstraints = CA:true

# Key usage: this is typical for a CA certificate. However since it will
# prevent it being used as an test self-signed certificate it is best
# left out by default.
# keyUsage = cRLSign, keyCertSign

# Some might want this also
nsCertType = sslCA, emailCA

# Include email address in subject alt name: another PKIX recommendation
# subjectAltName=email:copy
# Copy issuer details
# issuerAltName=issuer:copy

# DER hex encoding of an extension: beware experts only!
# obj=DER:02:03
# Where 'obj' is a standard or added object
# You can even override a supported extension:
# basicConstraints= critical, DER:30:03:01:01:FF

[ crl_ext ]

# CRL extensions.
# Only issuerAltName and authorityKeyIdentifier make any sense in a CRL.

# issuerAltName=issuer:copy
authorityKeyIdentifier=keyid:always,issuer:always

[ proxy_cert_ext ]
# These extensions should be added when creating a proxy certificate

# This goes against PKIX guidelines but some CAs do it and some software
# requires this to avoid interpreting an end user certificate as a CA.

basicConstraints=CA:FALSE

# Here are some examples of the usage of nsCertType. If it is omitted
# the certificate can be used for anything *except* object signing.

# This is OK for an SSL server.
# nsCertType = server

# For an object signing certificate this would be used.
# nsCertType = objsign

# For normal client use this is typical
# nsCertType = client, email

# and for everything including object signing:
# nsCertType = client, email, objsign

# This is typical in keyUsage for a client certificate.
# keyUsage = nonRepudiation, digitalSignature, keyEncipherment

# This will be displayed in Netscape's comment listbox.
nsComment = "OpenSSL Generated Certificate"

# PKIX recommendations harmless if included in all certificates.
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid,issuer:always

# This stuff is for subjectAltName and issuerAltname.
# Import the email address.
# subjectAltName=email:copy
# An alternative to produce certificates that aren't
# deprecated according to PKIX.
# subjectAltName=email:move

# Copy subject details
# issuerAltName=issuer:copy

#nsCaRevocationUrl = http://www.domain.dom/ca-crl.pem
#nsBaseUrl
#nsRevocationUrl
#nsRenewalUrl
#nsCaPolicyUrl
#nsSslServerName

# This really needs to be in place for it to be a proxy certificate.
proxyCertInfo=critical,language:id-ppl-anyLanguage,pathlen:3,policy:foo