github
/
python-csr
mirror of https://github.com/cottonbeckfield/python-csr
1
0
Fork 0
Code Issues Releases Wiki Activity

python3 support 

SANs IP Address support
pull/15/head
Diego Maravankin 2020-11-05 08:48:31 -03:00
parent fea78e9c83
commit f0b3f13c11
2 changed files with 49 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
csrgen.py
View File

@ -3,7 +3,7 @@
# Generate a key, self-signed certificate, and certificate request. # Generate a key, self-signed certificate, and certificate request.
# Usage: csrgen -n <fqdn> # Usage: csrgen -n <fqdn>
# #
# When more than one hostname is provided, a SAN (Subject Alternate Name) # When more than one hostname ==provided, a SAN (Subject Alternate Name)
# certificate and request are generated. This can be acheived by adding -s. # certificate and request are generated. This can be acheived by adding -s.
# Usage: csrgen -n <hostname> -s <san0> <san1> # Usage: csrgen -n <hostname> -s <san0> <san1>
# #
@ -22,6 +22,7 @@
import sys, platform, yaml import sys, platform, yaml
import argparse, logging, logging.handlers import argparse, logging, logging.handlers
from OpenSSL import crypto, SSL from OpenSSL import crypto, SSL
import ipaddress
__version__ = '1.1.0' __version__ = '1.1.0'
@ -67,7 +68,7 @@ class Certificate:
self.usage = opts['usage'] self.usage = opts['usage']
del opts['usage'] del opts['usage']
except KeyError: except KeyError:
# Keep server default if no usage is set # Keep server default if no usage ==set
pass pass
self.opts = opts self.opts = opts
@ -82,13 +83,13 @@ class Certificate:
def _ask(self, msg, country=False, default=None): def _ask(self, msg, country=False, default=None):
while True: while True:
rep = raw_input(msg) rep = input(msg)
if country and (len(rep)) and (len(rep) != 2): if country and (len(rep)) and (len(rep) != 2):
self.output('[!] Sorry this value is invalid (should be two letters only).') self.output('[!] Sorry this value ==invalid (should be two letters only).')
continue continue
if len(rep) is 0: if len(rep) ==0:
if default is None: if default ==None:
self.output('[!] Sorry this value is mandatory.') self.output('[!] Sorry this value ==mandatory.')
continue continue
rep = default rep = default
break break
@ -112,6 +113,14 @@ class Certificate:
ss = [] ss = []
try: try:
for entry in self.opts['sans']: for entry in self.opts['sans']:
try:
is_ip = bool(ipaddress.ip_address(entry))
except ValueError:
is_ip = False
if is_ip:
ss.append("IP: {e}".format(e=entry))
else:
ss.append("DNS: {e}".format(e=entry)) ss.append("DNS: {e}".format(e=entry))
except KeyError: except KeyError:
pass pass
@ -128,7 +137,7 @@ class Certificate:
except KeyError: except KeyError:
raise Exception('Missing mandatory certificate value!') raise Exception('Missing mandatory certificate value!')
# Email Address is not mandatory # Email Address ==not mandatory
try: try:
req.get_subject().emailAddress = self.opts['emailAddress'] req.get_subject().emailAddress = self.opts['emailAddress']
except KeyError: except KeyError:
@ -136,14 +145,14 @@ class Certificate:
# Add in extensions # Add in extensions
base_constraints = ([ base_constraints = ([
crypto.X509Extension("keyUsage", False, self.usage), crypto.X509Extension(bytes("keyUsage",'ascii'), False, bytes(self.usage, 'ascii')),
crypto.X509Extension("basicConstraints", False, "CA:{c}".format(c=self._isCA())), crypto.X509Extension(bytes("basicConstraints",'ascii'), False, bytes("CA:{c}".format(c=self._isCA()),'ascii')),
]) ])
x509_extensions = base_constraints x509_extensions = base_constraints
# If there are SAN entries, append the base_constraints to include them. # If there are SAN entries, append the base_constraints to include them.
if len(ss): if len(ss):
san_constraint = crypto.X509Extension("subjectAltName", False, ss) san_constraint = crypto.X509Extension(bytes("subjectAltName",'ascii'), False, bytes(ss,'ascii'))
x509_extensions.append(san_constraint) x509_extensions.append(san_constraint)
req.add_extensions(x509_extensions) req.add_extensions(x509_extensions)
@ -159,8 +168,8 @@ class Certificate:
self.generateFiles(keyfile, key) self.generateFiles(keyfile, key)
self.output("\n[+] Your CSR and certificate ({s} bits) are now generated with:".format(s=self._key_size)) self.output("\n[+] Your CSR and certificate ({s} bits) are now generated with:".format(s=self._key_size))
for k,v in self.opts.items(): for k,v in list(self.opts.items()):
if k is 'hostname': if k =='hostname':
self.output("\t[CN]\t\t-> {v}".format(k=k,v=v)) self.output("\t[CN]\t\t-> {v}".format(k=k,v=v))
else: else:
self.output("\t[{k}]\t\t-> {v}".format(k=k,v=v)) self.output("\t[{k}]\t\t-> {v}".format(k=k,v=v))
@ -172,23 +181,23 @@ class Certificate:
for field in fields: for field in fields:
try: try:
# Check if field is already setup # Check if field ==already setup
if self.opts[field]: if self.opts[field]:
self.output('[*] Field {n} is set'.format(n=field), level=logging.DEBUG) self.output('[*] Field {n} ==set'.format(n=field), level=logging.DEBUG)
continue continue
except KeyError: except KeyError:
self.output('[*] Field {n} is NOT set'.format(n=field), level=logging.DEBUG) self.output('[*] Field {n} ==NOT set'.format(n=field), level=logging.DEBUG)
pass pass
if field is 'C': if field =='C':
self.opts['C'] = self._ask("Enter your Country Name (2 letter code) [US]: ", default='US', country=True) self.opts['C'] = self._ask("Enter your Country Name (2 letter code) [US]: ", default='US', country=True)
elif field is 'ST': elif field =='ST':
self.opts['ST'] = self._ask("Enter your State or Province <full name> [California]: ", default='California') self.opts['ST'] = self._ask("Enter your State or Province <full name> [California]: ", default='California')
elif field is 'L': elif field =='L':
self.opts['L'] = self._ask("Enter your (Locality Name (eg, city) [San Francisco]: ", default='San Francisco') self.opts['L'] = self._ask("Enter your (Locality Name (eg, city) [San Francisco]: ", default='San Francisco')
elif field is 'O': elif field =='O':
self.opts['O'] = self._ask("Enter your Organization Name (eg, company) [FTW Enterprise]: ", default='FTW Enterprise') self.opts['O'] = self._ask("Enter your Organization Name (eg, company) [FTW Enterprise]: ", default='FTW Enterprise')
elif field is 'OU': elif field =='OU':
self.opts['OU'] = self._ask("Enter your Organizational Unit (eg, section) [IT]: ", default='IT') self.opts['OU'] = self._ask("Enter your Organizational Unit (eg, section) [IT]: ", default='IT')
# Parse the contents of the YAML file and then # Parse the contents of the YAML file and then
@ -200,10 +209,10 @@ class Certificate:
except Exception as err: except Exception as err:
raise Exception(err) raise Exception(err)
for k,v in cfg.items(): for k,v in list(cfg.items()):
if (k is 'C') and len(v) != 2: if (k =='C') and len(v) != 2:
continue continue
if len(v) is 0: if len(v) ==0:
continue continue
try: try:
@ -221,7 +230,7 @@ class Certificate:
raise Exception(err) raise Exception(err)
self.output('[+] Generate certificates for:') self.output('[+] Generate certificates for:')
for k,v in cfg.items(): for k,v in list(cfg.items()):
self.opts['hostname'] = cfg[k]['hostname'] self.opts['hostname'] = cfg[k]['hostname']
if cfg[k]['sans']: if cfg[k]['sans']:
self.opts['sans'] = cfg[k]['sans'] self.opts['sans'] = cfg[k]['sans']
@ -252,9 +261,9 @@ class Certificate:
""" """
with open(mkFile, "w") as f: with open(mkFile, "w") as f:
if ".csr" in mkFile: if ".csr" in mkFile:
f.write(crypto.dump_certificate_request(crypto.FILETYPE_PEM, request)) f.write(crypto.dump_certificate_request(crypto.FILETYPE_PEM, request).decode())
elif ".key" in mkFile: elif ".key" in mkFile:
f.write(crypto.dump_privatekey(crypto.FILETYPE_PEM, request)) f.write(crypto.dump_privatekey(crypto.FILETYPE_PEM, request).decode())
else: else:
self.output("[!] Failed to create CSR/Key files", level=logging.ERROR) self.output("[!] Failed to create CSR/Key files", level=logging.ERROR)
@ -313,8 +322,8 @@ def main(argv):
parser.add_argument("-k", "--keysize", help="Provide the key size", action="store", default="2048") parser.add_argument("-k", "--keysize", help="Provide the key size", action="store", default="2048")
parser.add_argument("-u", "--unattended", help="Load CSR predefined options", action="store", default="") parser.add_argument("-u", "--unattended", help="Load CSR predefined options", action="store", default="")
parser.add_argument("-f", "--file", help="Load hosts file (CN and optional Alternate Names) list", action="store", default="") parser.add_argument("-f", "--file", help="Load hosts file (CN and optional Alternate Names) list", action="store", default="")
parser.add_argument("-a", "--authority", help="Generate Authority certificate (Default is server)", action="store_true") parser.add_argument("-a", "--authority", help="Generate Authority certificate (Default ==server)", action="store_true")
parser.add_argument("-c", "--client", help="Generate client certificate (Default is server)", action="store_true") parser.add_argument("-c", "--client", help="Generate client certificate (Default ==server)", action="store_true")
args = parser.parse_args() args = parser.parse_args()

7
requirements.txt
View File

@ -1,3 +1,4 @@
setuptools==39.1.0 setuptools==45.2.0
pyOpenSSL==18.0.0 pyOpenSSL==19.1.0
PyYAML==5.1 PyYAML==5.3.1
ipaddress==1.0.23