├── src ├── __init__.py ├── configs │ ├── __init__.py │ └── params.yaml └── scripts │ ├── __init__.py │ └── certasainstall.py ├── doc └── outline.png ├── setup.py ├── requirements.txt ├── README.md └── LICENSE /src/__init__.py: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /src/configs/__init__.py: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /src/scripts/__init__.py: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /doc/outline.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/nomyownnet/cert_asa_install/HEAD/doc/outline.png -------------------------------------------------------------------------------- /setup.py: -------------------------------------------------------------------------------- 1 | from setuptools import setup 2 | 3 | setup( 4 | name="cert_asa_install", 5 | version="2.0", 6 | description="A tool for installation Let's Encrypt certificate on Cisco ASA.", 7 | author="@nomyownnet", 8 | download_url="" 9 | packages=["cert_asa_install"], 10 | scripts=["scripts/certasainstall.py"], 11 | ) -------------------------------------------------------------------------------- /src/configs/params.yaml: -------------------------------------------------------------------------------- 1 | ipaddress: "10.0.0.1" 2 | username: "admin" 3 | password: "P@ssw0rd" 4 | port: 443 5 | interface: "inside" 6 | domain: "vpn.domain.com" 7 | certpath: "/etc/letsencrypt/live/vpn.domain.com/" 8 | webroot: "/var/www/html/letsencrypt/" 9 | email: "someone@example.com" 10 | secret: "cisco" 11 | test: False 12 | pin: True -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | acme==1.22.0 2 | certbot==1.22.0 3 | certifi==2021.10.8 4 | cffi==1.15.0 5 | charset-normalizer==2.0.10 6 | ConfigArgParse==1.5.3 7 | configobj==5.0.6 8 | cryptography==36.0.1 9 | distro==1.6.0 10 | idna==3.3 11 | josepy==1.12.0 12 | mypy==0.931 13 | mypy-extensions==0.4.3 14 | parsedatetime==2.6 15 | pycparser==2.21 16 | pyOpenSSL==21.0.0 17 | pyRFC3339==1.1 18 | pytz==2021.3 19 | PyYAML==6.0 20 | requests==2.27.1 21 | requests-toolbelt==0.9.1 22 | six==1.16.0 23 | tomli==2.0.0 24 | types-cryptography==3.3.14 25 | types-enum34==1.1.8 26 | types-ipaddress==1.0.7 27 | types-pyOpenSSL==21.0.3 28 | types-PyYAML==6.0.3 29 | types-requests==2.27.7 30 | types-urllib3==1.26.7 31 | typing-extensions==4.0.1 32 | urllib3==1.26.8 33 | zope.component==5.0.1 34 | zope.event==4.5.0 35 | zope.hookable==5.1.0 36 | zope.interface==5.4.0 37 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | This script requests certificate from letsencrypt.org and installs it on cisco asa. Tested with python 3.7 2 | 3 | # Requirements 4 | Suppose you have vpn.domain.com. URL https://vpn.domain.com reserved for Cisco 'Anyconnect' portal and for connection to vpn with 'Anyconnect' client. 5 | http://vpn.domain.com are server, where script will be used. 6 | ![OUTLINE](doc/outline.png) 7 | 8 | Software: 9 | 1. Cisco ASA 9.6.3(1) and higher 10 | 2. Rest API 1.3.0 and higher 11 | 3. Python 3.7 12 | 13 | The script uses webroot method for check you are owner of domain name. 14 | 15 | # Installation Centos 7 16 | ------------------------------------------------------------------------- 17 | ## Preparing. 18 | Cisco asa: 19 | ```bash 20 | ciscoasa(config)# boot system disk0:/asa963-17-smp-k8.bin 21 | ciscoasa(config)# rest-api image disk0:/asa-restapi-132100-lfbff-k8.SPA 22 | ciscoasa(config)# rest-api agent 23 | ``` 24 | 25 | Script-machine: 26 | ```bash 27 | [netadmin@server]# yum install epel-release -y 28 | [netadmin@server]# yum install nginx certbot -y 29 | [netadmin@server]# mkdir -p /var/www/html/letsencrypt 30 | [netadmin@server]# cat <> /etc/nginx/conf.d/vpn.domain.com.conf 31 | server { 32 | listen 80; 33 | server_name vpn.domain.com; 34 | location ~ /\.well-known { 35 | root /var/www/html/letsencrypt/; 36 | } 37 | } 38 | EOF 39 | [netadmin@server]# systemctl enable nginx 40 | [netadmin@server]# systemctl start nginx 41 | ``` 42 | ## Getting script 43 | 44 | ```bash 45 | git clone https://github.com/nomyownnet/ca-asa-install.git 46 | or 47 | curl -O https://github.com/nomyownnet/ca-asa-install/archive/master.zip 48 | ``` 49 | 50 | ## Filling params file 51 | 52 | ```bash 53 | # Management ip address of cisco asa 54 | ipaddress: "10.0.0.1" 55 | # Credentionals. Be sure, that your account has admin rights. 56 | username: "admin" 57 | password: "P@ssw0rd" 58 | # Port of admin portal cisco asa, not vpn. 59 | port: 443 60 | # Interface cisco asa, on which anyconnect works. 61 | interface: "inside" 62 | domain: "vpn.domain.com" 63 | # Path to private key, cert and chain. Default value for Centos 7. 64 | certpath: "/etc/letsencrypt/live/vpn.domain.com/" 65 | # Path for check domain name 66 | webroot: "/var/www/html/letsencrypt/" 67 | # Email address for important account notifications from Let's Encrypt 68 | email: "someone@example.com" 69 | # Password for pkcs12. Be sure, that it's not 'root' or 'qwerty' 70 | secret: "cisco" 71 | # Getting test certificate. 72 | testcert = False 73 | # Import certificate to cisco asa with or without pinning to interface 74 | pin = True 75 | ``` 76 | 77 | ## Run script. 78 | It can take the path to the config as argumnt. The default path is "../configs/config.yaml" 79 | ```bash 80 | [netadmin@server]# ./certasainstall.py ../configs/config.yaml 81 | The certificate has been installed succefully. 82 | The certificate has been pinned to the interface. 83 | ``` 84 | ## Verifying 85 | The script creates trustpoint with current date as a name. 86 | 87 | ```bash 88 | ciscoasa# sh crypto ca certificate trustpoint_name 89 | CA Certificate 90 | Status: Available 91 | Certificate Serial Number: 4df42b95d1ee9b3a4c2eb33b8d105dd6 92 | Certificate Usage: Signature 93 | Public Key Type: RSA (2048 bits) 94 | Signature Algorithm: SHA256 with RSA Encryption 95 | Issuer Name: 96 | cn=(STAGING) Pretend Pear X1 97 | o=(STAGING) Internet Security Research Group 98 | c=US 99 | Subject Name: 100 | cn=(STAGING) Artificial Apricot R3 101 | o=(STAGING) Let's Encrypt 102 | c=US 103 | CRL Distribution Points: 104 | [1] http://stg-x1.c.lencr.org/ 105 | Validity Date: 106 | start date: 00:00:00 UTC Sep 4 2020 107 | end date: 16:00:00 UTC Sep 15 2025 108 | Storage: config 109 | Associated Trustpoints: 20220621 110 | 111 | Certificate 112 | Status: Available 113 | Certificate Serial Number: 00fa91301208ae678236ea17cf95b885129f7b 114 | Certificate Usage: General Purpose 115 | Public Key Type: RSA (2048 bits) 116 | Signature Algorithm: SHA256 with RSA Encryption 117 | Issuer Name: 118 | cn=(STAGING) Artificial Apricot R3 119 | o=(STAGING) Let's Encrypt 120 | c=US 121 | Subject Name: 122 | cn=vpn.domain.com 123 | OCSP AIA: 124 | URL: http://stg-r3.o.lencr.org 125 | Validity Date: 126 | start date: 22:18:15 UTC Jun 20 2022 127 | end date: 22:18:14 UTC Sep 18 2022 128 | Storage: config 129 | Associated Trustpoints: 20220621 130 | 131 | ciscoasa# show run | i trust 132 | ... ... 133 | crypto ca trustpoint trustpoint_name 134 | ... ... 135 | ssl trust-point trustpoint_name vpn_interface 136 | ... ... 137 | ``` 138 | 139 | ## Possible errors 140 | 1. TrustPoint 'trustpoint_name' name is already assigned with CA certificate 141 | ```bash 142 | Something went wrong. 143 | { 144 | "messages": [ 145 | { 146 | "code": "INVALID-INPUT", 147 | "context": "name", 148 | "details": "TrustPoint 'trustpoint_name' name is already assigned with CA certificate.", 149 | "level": "Error" 150 | } 151 | ] 152 | } 153 | ``` 154 | Delete trustpoint from cisco asa. 155 | ```bash 156 | ciscoasa(config)#no crypto ca trustpoint 20220621 noconfirm 157 | ``` 158 | 2. Keypair name VPN_TP_Sep2013 already exist. 159 | Delete keypair from cisco asa. 160 | ```bash 161 | ciscoasa(config)# crypto key zeroize rsa label trustpoint_name noconfirm 162 | ``` 163 | 164 | -------------------------------------------------------------------------------- /src/scripts/certasainstall.py: -------------------------------------------------------------------------------- 1 | #!/us/bin/env python3 2 | 3 | from certbot import util 4 | from datetime import datetime 5 | from OpenSSL import crypto 6 | from typing import Any 7 | import base64 8 | import json 9 | import yaml 10 | import requests 11 | from requests.auth import HTTPBasicAuth 12 | import sys 13 | import urllib3 14 | 15 | class CertAsaInstall(): 16 | 17 | 18 | def __init__( 19 | self, 20 | ipaddress: str, 21 | username: str, 22 | password: str, 23 | secret: str, 24 | interface: str, 25 | domain: str, 26 | certpath: str, 27 | webroot: str, 28 | email: str, 29 | port: int = 443, 30 | test: bool = False, 31 | pin: bool = True, 32 | ): 33 | 34 | self.ipaddress = ipaddress 35 | self.username = username 36 | self.password = password 37 | self.interface = interface 38 | self.domain = domain 39 | self.certpath = certpath 40 | self.webroot = webroot 41 | self.email = email 42 | self.secret = secret 43 | self.test = test 44 | self.pin = pin 45 | 46 | # Mgmt url 47 | if port == 443: 48 | self.server = f"https://{ipaddress}" 49 | else: 50 | self.server = f"https://{ipaddress}:{port}" 51 | self.headers = f"{{'Content-Type': 'application/json', 'User-Agent':'REST API Agent'}}" 52 | 53 | # Path for install cert 54 | self.api_path_cert = f"/api/certificate/identity" 55 | self.url_cert = f"{self.server}{self.api_path_cert}" 56 | 57 | # Path for pin cert 58 | self.api_path_pin = f"/api/cli" 59 | self.url_pin = f"{self.server}{self.api_path_pin}" 60 | 61 | @staticmethod 62 | def untrusted_mgmt() -> None: 63 | urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) 64 | 65 | @staticmethod 66 | def _datename() -> str: 67 | return str(datetime.now().strftime("%Y%m%d")) 68 | 69 | @staticmethod 70 | def _post(url: str, post_data: dict[str, Any], username: str, password: str) -> None: 71 | try: 72 | r = requests.post( 73 | url, 74 | data=json.dumps(post_data), 75 | auth=(username, password), 76 | headers={ 77 | 'Content-Type': 'application/json', 78 | 'User-Agent': 'REST API Agent'}, 79 | verify=False 80 | ) 81 | if r.status_code == 201: 82 | print("The certificate has been installed succefully.") 83 | elif r.status_code == 200: 84 | print("The certificate has been pinned to the interface.") 85 | else: 86 | print("Something went wrong.") 87 | print(r.text) 88 | except requests.HTTPError as err: 89 | print(f"Error received from server. HTTP Status code :{str(err.response.status_code)}") 90 | try: 91 | print(err.response.text) 92 | except ValueError: 93 | pass 94 | 95 | def request_pkcs12(self) -> None: 96 | certbot_params = [ 97 | 'certbot', 98 | '-n', 99 | 'certonly', 100 | '--webroot', 101 | '-w', 102 | self.webroot, 103 | '-d', 104 | self.domain, 105 | '--agree-tos', 106 | '--email', 107 | self.email 108 | ] 109 | 110 | if self.test == True: 111 | certbot_params.append('--test-cert') 112 | 113 | util.run_script(certbot_params) 114 | 115 | with open(f"{self.certpath}privkey.pem", "rb") as key_pem: 116 | privkey = crypto.load_privatekey(crypto.FILETYPE_PEM, key_pem.read()) 117 | 118 | with open(f"{self.certpath}cert.pem", "rb") as cert_pem: 119 | cert = crypto.load_certificate(crypto.FILETYPE_PEM, cert_pem.read()) 120 | 121 | with open(f"{self.certpath}chain.pem", "rb") as ca_pem: 122 | ca = [crypto.load_certificate(crypto.FILETYPE_PEM, ca_pem.read())] 123 | 124 | p12 = crypto.PKCS12() 125 | p12.set_privatekey(privkey) 126 | p12.set_certificate(cert) 127 | p12.set_ca_certificates(ca) 128 | cert_p12 = p12.export(str.encode(self.secret)) 129 | 130 | with open(f"{self.certpath}{self._datename()}.p12", "wb") as p12file: 131 | p12file.write(cert_p12) 132 | 133 | def install_cert(self) -> None: 134 | cert_pkcs12 = ['-----BEGIN PKCS12-----'] 135 | with open(f"{self.certpath}{self._datename()}.p12", "rb") as cert: 136 | encoded_string = base64.b64encode(cert.read()) 137 | c = encoded_string 138 | while len(c) > 64: 139 | cert_pkcs12.append(c[:64].decode("utf-8")) 140 | c = c[64:] 141 | else: 142 | cert_pkcs12.append(c.decode("utf-8") ) 143 | cert_pkcs12.append('-----END PKCS12-----') 144 | install_cert = { 145 | 'certPass': self.secret, 146 | 'kind': 'object#IdentityCertificate', 147 | 'certText': cert_pkcs12, 148 | 'name': self._datename() 149 | } 150 | self._post(self.url_cert, install_cert, self.username, self.password) 151 | 152 | def pin_cert(self) -> None: 153 | cmd = f"ssl trust-point {self._datename()} {self.interface}" 154 | pin_cert = {'commands': [cmd, 'write']} 155 | self._post(self.url_pin, pin_cert, self.username, self.password) 156 | 157 | 158 | if __name__ == '__main__': 159 | if len(sys.argv) > 1: 160 | config = sys.argv[1] 161 | else: 162 | config = "../configs/params.yaml" 163 | with open(config) as c: 164 | params = yaml.safe_load(c) 165 | cai = CertAsaInstall(**params) 166 | cai.untrusted_mgmt() 167 | cai.request_pkcs12() 168 | cai.install_cert() 169 | if params['pin'] == True: 170 | cai.pin_cert() -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | NOTE 2 | ---- 3 | 4 | LibreNMS is covered by the GPLv3, and includes exceptions for included 5 | third-party packages. 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You may not convey a covered 535 | work if you are a party to an arrangement with a third party that is 536 | in the business of distributing software, under which you make payment 537 | to the third party based on the extent of your activity of conveying 538 | the work, and under which the third party grants, to any of the 539 | parties who would receive the covered work from you, a discriminatory 540 | patent license (a) in connection with copies of the covered work 541 | conveyed by you (or copies made from those copies), or (b) primarily 542 | for and in connection with specific products or compilations that 543 | contain the covered work, unless you entered into that arrangement, 544 | or that patent license was granted, prior to 28 March 2007. 545 | 546 | Nothing in this License shall be construed as excluding or limiting 547 | any implied license or other defenses to infringement that may 548 | otherwise be available to you under applicable patent law. 549 | 550 | 12. No Surrender of Others' Freedom. 551 | 552 | If conditions are imposed on you (whether by court order, agreement or 553 | otherwise) that contradict the conditions of this License, they do not 554 | excuse you from the conditions of this License. If you cannot convey a 555 | covered work so as to satisfy simultaneously your obligations under this 556 | License and any other pertinent obligations, then as a consequence you may 557 | not convey it at all. For example, if you agree to terms that obligate you 558 | to collect a royalty for further conveying from those to whom you convey 559 | the Program, the only way you could satisfy both those terms and this 560 | License would be to refrain entirely from conveying the Program. 561 | 562 | 13. Use with the GNU Affero General Public License. 563 | 564 | Notwithstanding any other provision of this License, you have 565 | permission to link or combine any covered work with a work licensed 566 | under version 3 of the GNU Affero General Public License into a single 567 | combined work, and to convey the resulting work. The terms of this 568 | License will continue to apply to the part which is the covered work, 569 | but the special requirements of the GNU Affero General Public License, 570 | section 13, concerning interaction through a network will apply to the 571 | combination as such. 572 | 573 | 14. Revised Versions of this License. 574 | 575 | The Free Software Foundation may publish revised and/or new versions of 576 | the GNU General Public License from time to time. Such new versions will 577 | be similar in spirit to the present version, but may differ in detail to 578 | address new problems or concerns. 579 | 580 | Each version is given a distinguishing version number. If the 581 | Program specifies that a certain numbered version of the GNU General 582 | Public License "or any later version" applies to it, you have the 583 | option of following the terms and conditions either of that numbered 584 | version or of any later version published by the Free Software 585 | Foundation. If the Program does not specify a version number of the 586 | GNU General Public License, you may choose any version ever published 587 | by the Free Software Foundation. 588 | 589 | If the Program specifies that a proxy can decide which future 590 | versions of the GNU General Public License can be used, that proxy's 591 | public statement of acceptance of a version permanently authorizes you 592 | to choose that version for the Program. 593 | 594 | Later license versions may give you additional or different 595 | permissions. However, no additional obligations are imposed on any 596 | author or copyright holder as a result of your choosing to follow a 597 | later version. 598 | 599 | 15. Disclaimer of Warranty. 600 | 601 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 602 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 603 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 604 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 605 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 606 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 607 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 608 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 609 | 610 | 16. Limitation of Liability. 611 | 612 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 613 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 614 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 615 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 616 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 617 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 618 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 619 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 620 | SUCH DAMAGES. 621 | 622 | 17. Interpretation of Sections 15 and 16. 623 | 624 | If the disclaimer of warranty and limitation of liability provided 625 | above cannot be given local legal effect according to their terms, 626 | reviewing courts shall apply local law that most closely approximates 627 | an absolute waiver of all civil liability in connection with the 628 | Program, unless a warranty or assumption of liability accompanies a 629 | copy of the Program in return for a fee. 630 | 631 | END OF TERMS AND CONDITIONS 632 | 633 | How to Apply These Terms to Your New Programs 634 | 635 | If you develop a new program, and you want it to be of the greatest 636 | possible use to the public, the best way to achieve this is to make it 637 | free software which everyone can redistribute and change under these terms. 638 | 639 | To do so, attach the following notices to the program. It is safest 640 | to attach them to the start of each source file to most effectively 641 | state the exclusion of warranty; and each file should have at least 642 | the "copyright" line and a pointer to where the full notice is found. 643 | 644 | 645 | Copyright (C) 646 | 647 | This program is free software: you can redistribute it and/or modify 648 | it under the terms of the GNU General Public License as published by 649 | the Free Software Foundation, either version 3 of the License, or 650 | (at your option) any later version. 651 | 652 | This program is distributed in the hope that it will be useful, 653 | but WITHOUT ANY WARRANTY; without even the implied warranty of 654 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 655 | GNU General Public License for more details. 656 | 657 | You should have received a copy of the GNU General Public License 658 | along with this program. If not, see . 659 | 660 | Also add information on how to contact you by electronic and paper mail. 661 | 662 | If the program does terminal interaction, make it output a short 663 | notice like this when it starts in an interactive mode: 664 | 665 | Copyright (C) 666 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 667 | This is free software, and you are welcome to redistribute it 668 | under certain conditions; type `show c' for details. 669 | 670 | The hypothetical commands `show w' and `show c' should show the appropriate 671 | parts of the General Public License. Of course, your program's commands 672 | might be different; for a GUI interface, you would use an "about box". 673 | 674 | You should also get your employer (if you work as a programmer) or school, 675 | if any, to sign a "copyright disclaimer" for the program, if necessary. 676 | For more information on this, and how to apply and follow the GNU GPL, see 677 | . 678 | 679 | The GNU General Public License does not permit incorporating your program 680 | into proprietary programs. If your program is a subroutine library, you 681 | may consider it more useful to permit linking proprietary applications with 682 | the library. If this is what you want to do, use the GNU Lesser General 683 | Public License instead of this License. But first, please read 684 | . 685 | --------------------------------------------------------------------------------