Add guide for certificate lab
This commit is contained in:
parent
eff853da28
commit
7afd00dc4a
1
.gitignore
vendored
Normal file
1
.gitignore
vendored
Normal file
|
|
@ -0,0 +1 @@
|
||||||
|
*.pem
|
||||||
276
Lab 2 - Certificates/README.md
Normal file
276
Lab 2 - Certificates/README.md
Normal file
|
|
@ -0,0 +1,276 @@
|
||||||
|
# Lab 02 - Certificates
|
||||||
|
## Create Working Environment
|
||||||
|
```sh
|
||||||
|
mkdir -p /root/ca
|
||||||
|
cd /root/ca
|
||||||
|
mkdir certs crl newcerts private
|
||||||
|
chmod 700 private
|
||||||
|
```
|
||||||
|
|
||||||
|
## Create Private Key
|
||||||
|
```sh
|
||||||
|
openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -out private/ca.key.pem
|
||||||
|
```
|
||||||
|
|
||||||
|
## Create Public Key
|
||||||
|
```sh
|
||||||
|
openssl pkey -in private/ca.key.pem -out ca.key.pem.pub -pubout
|
||||||
|
```
|
||||||
|
|
||||||
|
## Create Certificate Authority
|
||||||
|
Run using `sudo -i`:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
touch index.txt
|
||||||
|
echo 1000 > serial
|
||||||
|
```
|
||||||
|
|
||||||
|
Create OpenSSL config:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
vi /root/ca/openssl.cnf
|
||||||
|
```
|
||||||
|
|
||||||
|
***`/root/ca/openssl.cnf`:***
|
||||||
|
|
||||||
|
```ini
|
||||||
|
# OpenSSL root CA configuration file.
|
||||||
|
# Copy to `/root/ca/openssl.cnf`.
|
||||||
|
|
||||||
|
[ ca ]
|
||||||
|
# `man ca`
|
||||||
|
default_ca = CA_default
|
||||||
|
|
||||||
|
[ CA_default ]
|
||||||
|
# Directory and file locations.
|
||||||
|
dir = /root/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 =
|
||||||
|
0.organizationName_default = Alice Ltd
|
||||||
|
organizationalUnitName_default =
|
||||||
|
emailAddress_default =
|
||||||
|
|
||||||
|
[ 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
|
||||||
|
```
|
||||||
|
|
||||||
|
Create root certificate:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
openssl req -config openssl.cnf -key private/ca.key.pem -new -x509 -days 7300 -sha256 -extensions v3_ca -out certs/ca.cert.pem
|
||||||
|
```
|
||||||
|
|
||||||
|
## Create Certificate Signing Request
|
||||||
|
```sh
|
||||||
|
openssl req -new -newkey rsa:2048 -nodes -keyout server.key -out server.csr
|
||||||
|
```
|
||||||
|
|
||||||
|
## Create Certificate Chain
|
||||||
|
```sh
|
||||||
|
mkdir -p /root/intermediate
|
||||||
|
echo 1000 > /root/intermediate/serial
|
||||||
|
echo 0100 > /root/intermediate/crlnumber
|
||||||
|
```
|
||||||
|
|
||||||
|
Configure OpenSSL:
|
||||||
|
```sh
|
||||||
|
vi /root/intermediate/openssl_intermediate.cnf
|
||||||
|
```
|
||||||
|
|
||||||
|
***`openssl_intermediate.cnf`:***
|
||||||
|
```ini
|
||||||
|
[ ca ] # The default CA section
|
||||||
|
default_ca = CA_default # The default CA name
|
||||||
|
|
||||||
|
[ CA_default ] # Default settings for the intermediate CA
|
||||||
|
dir = /root/intermediate # Intermediate CA directory
|
||||||
|
certs = $dir/certs # Certificates directory
|
||||||
|
crl_dir = $dir/crl # CRL directory
|
||||||
|
new_certs_dir = $dir/newcerts # New certificates directory
|
||||||
|
database = $dir/index.txt # Certificate index file
|
||||||
|
serial = $dir/serial # Serial number file
|
||||||
|
RANDFILE = $dir/private/.rand # Random number file
|
||||||
|
private_key = $dir/private/intermediate.key.pem # Intermediate CA private key
|
||||||
|
certificate = $dir/certs/intermediate.cert.pem # Intermediate CA certificate
|
||||||
|
crl = $dir/crl/intermediate.crl.pem # Intermediate CA CRL
|
||||||
|
crlnumber = $dir/crlnumber # Intermediate CA CRL number
|
||||||
|
crl_extensions = crl_ext # CRL extensions
|
||||||
|
default_crl_days = 30 # Default CRL validity days
|
||||||
|
default_md = sha256 # Default message digest
|
||||||
|
preserve = no # Preserve existing extensions
|
||||||
|
email_in_dn = no # Exclude email from the DN
|
||||||
|
name_opt = ca_default # Formatting options for names
|
||||||
|
cert_opt = ca_default # Certificate output options
|
||||||
|
policy = policy_loose # Certificate policy
|
||||||
|
|
||||||
|
[ policy_loose ] # Policy for less strict validation
|
||||||
|
countryName = optional # Country is optional
|
||||||
|
stateOrProvinceName = optional # State or province is optional
|
||||||
|
localityName = optional # Locality is optional
|
||||||
|
organizationName = optional # Organization is optional
|
||||||
|
organizationalUnitName = optional # Organizational unit is optional
|
||||||
|
commonName = supplied # Must provide a common name
|
||||||
|
emailAddress = optional # Email address is optional
|
||||||
|
|
||||||
|
[ req ] # Request settings
|
||||||
|
default_bits = 2048 # Default key size
|
||||||
|
distinguished_name = req_distinguished_name # Default DN template
|
||||||
|
string_mask = utf8only # UTF-8 encoding
|
||||||
|
default_md = sha256 # Default message digest
|
||||||
|
x509_extensions = v3_intermediate_ca # Extensions for intermediate CA certificate
|
||||||
|
|
||||||
|
[ req_distinguished_name ] # Template for the DN in the CSR
|
||||||
|
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
|
||||||
|
|
||||||
|
[ v3_intermediate_ca ] # Intermediate CA certificate extensions
|
||||||
|
subjectKeyIdentifier = hash # Subject key identifier
|
||||||
|
authorityKeyIdentifier = keyid:always,issuer # Authority key identifier
|
||||||
|
basicConstraints = critical, CA:true, pathlen:0 # Basic constraints for a CA
|
||||||
|
keyUsage = critical, digitalSignature, cRLSign, keyCertSign # Key usage for a CA
|
||||||
|
|
||||||
|
[ crl_ext ] # CRL extensions
|
||||||
|
authorityKeyIdentifier=keyid:always # Authority key identifier
|
||||||
|
|
||||||
|
[ server_cert ] # Server certificate extensions
|
||||||
|
basicConstraints = CA:FALSE # Not a CA certificate
|
||||||
|
nsCertType = server # Server certificate type
|
||||||
|
keyUsage = critical, digitalSignature, keyEncipherment # Key usage for a server cert
|
||||||
|
extendedKeyUsage = serverAuth # Extended key usage for server authentication purposes (e.g., TLS/SSL servers).
|
||||||
|
authorityKeyIdentifier = keyid,issuer # Authority key identifier linking the certificate to the issuer's public key.
|
||||||
|
```
|
||||||
|
|
||||||
|
```sh
|
||||||
|
openssl genrsa -out /root/intermediate/intermediate.key.pem 4096
|
||||||
|
```
|
||||||
|
|
||||||
|
Requesting and signing intermediate certificate:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
cd /root/intermediate
|
||||||
|
|
||||||
|
# Create Request
|
||||||
|
openssl req -new -newkey rsa:2048 -nodes -key intermediate.key.pem -out intermediate.req
|
||||||
|
|
||||||
|
# Sign Certificate
|
||||||
|
openssl ca -config /root/ca/openssl.cnf -extensions v3_intermediate_ca -days 3650 -notext -md sha256 -in intermediate.req -out intermediate.cer
|
||||||
|
```
|
||||||
Loading…
Reference in a new issue