119 lines
3.7 KiB
Python
119 lines
3.7 KiB
Python
"""
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Utility for generating OpenVPN client configuration files.
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"""
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import os
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import subprocess
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def generate_client_config(username: str):
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"""
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Generates a .ovpn file for a given user.
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Args:
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username: The username for which to generate the config.
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"""
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easyrsa_dir = "/etc/openvpn/easy-rsa/"
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ca_path = "/home/arthur/openvpn-ca/pki/ca.crt"
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ta_path = "/home/arthur/openvpn-ca/ta.key"
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client_crt_path = f"/home/arthur/openvpn-ca/pki/issued/{username}.crt"
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client_key_path = f"/home/arthur/openvpn-ca/pki/private/{username}.key"
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output_path = f"/etc/openvpn/client/{username}.ovpn"
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# Step 1: Generate the client certificate
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print(f"Generating certificate for user: {username}...")
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try:
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command = ["./easyrsa", "build-client-full", username, "nopass"]
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process = subprocess.run(
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command,
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cwd=easyrsa_dir,
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check=True,
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capture_output=True,
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text=True
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)
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print(process.stdout)
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print("Certificate generated successfully.")
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except FileNotFoundError:
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print(f"Error: 'easyrsa' script not found in {easyrsa_dir}. Please check the path.")
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return
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except subprocess.CalledProcessError as e:
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print(f"Error generating certificate for user: {username}")
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print(f"Return code: {e.returncode}")
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print(f"Stderr: {e.stderr}")
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return
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# Step 2: Verify that all required files exist
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for f in [ca_path, ta_path, client_crt_path, client_key_path]:
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if not os.path.isfile(f):
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print(f"Error: Cannot read file '{f}'. File not found after generation.")
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return
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# Step 3: Read the content of the files
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try:
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with open(ca_path, 'r') as f:
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ca_content = f.read()
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with open(client_crt_path, 'r') as f:
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client_crt_content = f.read()
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with open(client_key_path, 'r') as f:
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client_key_content = f.read()
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with open(ta_path, 'r') as f:
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ta_content = f.read()
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except IOError as e:
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print(f"Error reading files: {e}")
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return
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# Step 4: Assemble the .ovpn configuration
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ovpn_config = f"""
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client
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dev tun
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proto udp
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remote 14.241.240.102 1194 # use FTP IP address
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resolv-retry infinite
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nobind
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persist-key
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persist-tun
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remote-cert-tls server
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cipher AES-256-GCM
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# push mac address info
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push-peer-info
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verb 3
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<ca>
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{ca_content}
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</ca>
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<cert>
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{client_crt_content}
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</cert>
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<key>
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{client_key_content}
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</key>
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<tls-auth>
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{ta_content}
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</tls-auth>
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key-direction 1
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"""
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# Step 5: Write the configuration to the output file
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try:
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output_dir = os.path.dirname(output_path)
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# Check if dir exists and if we have write permission
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if not os.path.isdir(output_dir) or not os.access(output_dir, os.W_OK):
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print(f"Error: Output directory '{output_dir}' does not exist or is not writable.")
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print("Please ensure you have the correct permissions to write to this directory.")
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# As a fallback, save to a local directory
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local_output_dir = "generated-clients"
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if not os.path.exists(local_output_dir):
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os.makedirs(local_output_dir)
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local_output_path = os.path.join(local_output_dir, f"{username}.ovpn")
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with open(local_output_path, 'w') as f:
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f.write(ovpn_config)
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print(f"Could not write to server path. Saved config locally to: {local_output_path}")
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return
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with open(output_path, 'w') as f:
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f.write(ovpn_config)
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print(f"Successfully generated client config: {output_path}")
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except IOError as e:
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print(f"Error writing to file: {e}") |