Openssl hacks for dev

clear_ca.bash

#!/usr/bin/env bash

read -r -p "Are You Sure You Want to Remove the Certificate Authority? [Y/n] " input

case $input in
    [yY][eE][sS]|[yY])
	rm -f certs/ca.cert.pem private/ca.key.pem
 ;;
    *)
	echo "Quitting"
	exit 1
 ;;
esac

clear_cert_history.bash

#!/usr/bin/env bash
rm -rf newcerts/* server_certs/*
rm serial* index.txt*
mkdir -p newcerts 
touch index.txt
echo 1000 > serial

gen_ca.bash

#!/usr/bin/env bash
  
#
# Generates a very insecure CA for dev purposes
#

# Preparation
#  mkdir certs crl newcerts private
#  chmod 700 private
#  touch index.txt
#  echo 1000 > serial


if [ -f certs/ca.cert.pem ]; then
    echo "CA already exists, quitting"
    exit 1
fi

# Generate the root key (no passphrase)
openssl genrsa -out private/ca.key.pem 2048 -nodes
chmod 400 private/ca.key.pem

# Generate the CA cert
openssl req -config openssl.cnf \
      -key private/ca.key.pem \
      -subj "/C=GB/ST=England/L=Ipswich/O=FOO/OU=BAR/OU=BAZ" \
      -new -x509 -days 9999 -sha256 -extensions v3_ca \
      -out certs/ca.cert.pem

# Print cert info
openssl x509 -noout -text -in certs/ca.cert.pem

gen_signed_server_certs.bash

#!/usr/bin/env bash

#
# Generates a dev certificate/key bundle signed by the dev CA
#

CERT_NAME=$1
CA_CONF=../../openssl.cnf

if [ -z "$CERT_NAME" ]; then
  echo "Usage: $0 <server-name>"
  exit 1
fi

mkdir -p "server_certs/$CERT_NAME"
pushd "server_certs/$CERT_NAME"

SERVER_PK="$CERT_NAME-privateKey.pem"

# Create a private key for the server
openssl genrsa -out "$SERVER_PK" 2048
chmod 400 "$SERVER_PK"

SERVER_CERT_CSR="$CERT_NAME-csr.pem"
SERVER_CERT="$CERT_NAME-ca-signed-certificate.pem"

# Create a CSR from the server's private key
openssl req -key "$SERVER_PK" -config "$CA_CONF" -out "$SERVER_CERT_CSR" -new -nodes \
        -subj "//C=GB/ST=England/L=Ipswich/O=FOO/OU=BAR/OU=BAZ/CN=$CERT_NAME"

# Use the CSR to create the signed public certificate
openssl ca -batch -config "$CA_CONF" -days 9999 -notext -md sha256  \
        -in "$SERVER_CERT_CSR" -out "$SERVER_CERT"

# haproxy needs a combined private-key and public cert
cat "$SERVER_PK" "$SERVER_CERT" > "$CERT_NAME-combined.pem"

popd

openssl.cnf

# OpenSSL root CA configuration file.

[ ca ]
# `man ca`
default_ca = CA_default

[ CA_default ]
# Directory and file locations.
dir               = /home/tony/dev-ca
certs             = $dir/certs
crl_dir           = $dir/crl
new_certs_dir     = $dir/newcerts
database          = $dir/index.txt
serial            = $dir/serial
RANDFILE          = $dir/private/.rand

# The root key and root certificate.
private_key       = $dir/private/ca.key.pem
certificate       = $dir/certs/ca.cert.pem

# For certificate revocation lists.
crlnumber         = $dir/crlnumber
crl               = $dir/crl/ca.crl.pem
crl_extensions    = crl_ext
default_crl_days  = 30

# SHA-1 is deprecated, so use SHA-2 instead.
default_md        = sha256

name_opt          = ca_default
cert_opt          = ca_default
default_days      = 375
preserve          = no
policy            = policy_strict

[ policy_strict ]
# The root CA should only sign intermediate certificates that match.
# See the POLICY FORMAT section of `man ca`.
countryName             = match
stateOrProvinceName     = match
organizationName        = match
organizationalUnitName  = optional
commonName              = supplied
emailAddress            = optional

[ policy_loose ]
# Allow the intermediate CA to sign a more diverse range of certificates.
# See the POLICY FORMAT section of the `ca` man page.
countryName             = optional
stateOrProvinceName     = optional
localityName            = optional
organizationName        = optional
organizationalUnitName  = optional
commonName              = supplied
emailAddress            = optional

[ req ]
# Options for the `req` tool (`man req`).
default_bits        = 2048
distinguished_name  = req_distinguished_name
string_mask         = utf8only

# SHA-1 is deprecated, so use SHA-2 instead.
default_md          = sha256

# Extension to add when the -x509 option is used.
x509_extensions     = v3_ca

[ req_distinguished_name ]
# See <https://en.wikipedia.org/wiki/Certificate_signing_request>.
countryName                     = Country Name (2 letter code)
stateOrProvinceName             = State or Province Name
localityName                    = Locality Name
0.organizationName              = Organization Name
organizationalUnitName          = Organizational Unit Name
commonName                      = Common Name
emailAddress                    = Email Address

# Optionally, specify some defaults.
countryName_default             = GB
stateOrProvinceName_default     = England
localityName_default            = Ipswich
0.organizationName_default      = FOO
organizationalUnitName_default  = BAR
emailAddress_default            = noreply@baz.com

[ v3_ca ]
# Extensions for a typical CA (`man x509v3_config`).
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid:always,issuer
basicConstraints = critical, CA:true
keyUsage = critical, digitalSignature, cRLSign, keyCertSign

[ v3_intermediate_ca ]
# Extensions for a typical intermediate CA (`man x509v3_config`).
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid:always,issuer
basicConstraints = critical, CA:true, pathlen:0
keyUsage = critical, digitalSignature, cRLSign, keyCertSign

[ usr_cert ]
# Extensions for client certificates (`man x509v3_config`).
basicConstraints = CA:FALSE
nsCertType = client, email
nsComment = "OpenSSL Generated Client Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
keyUsage = critical, nonRepudiation, digitalSignature, keyEncipherment
extendedKeyUsage = clientAuth, emailProtection

[ server_cert ]
# Extensions for server certificates (`man x509v3_config`).
basicConstraints = CA:FALSE
nsCertType = server
nsComment = "OpenSSL Generated Server Certificate"
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer:always
keyUsage = critical, digitalSignature, keyEncipherment
extendedKeyUsage = serverAuth

[ crl_ext ]
# Extension for CRLs (`man x509v3_config`).
authorityKeyIdentifier=keyid:always

[ ocsp ]
# Extension for OCSP signing certificates (`man ocsp`).
basicConstraints = CA:FALSE
subjectKeyIdentifier = hash
authorityKeyIdentifier = keyid,issuer
keyUsage = critical, digitalSignature
extendedKeyUsage = critical, OCSPSigning

Horribly insecure, but possibly useful if creating a bunch of server certificates to avoid trusting each new one

Choose the server/VIP host as the CN parameter to make the certificates valid