diff options
Diffstat (limited to 'margfools')
| -rwxr-xr-x | margfools | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/margfools b/margfools deleted file mode 100755 index 6f6d8d5..0000000 --- a/margfools +++ /dev/null @@ -1,126 +0,0 @@ -#!/usr/bin/env python3 - -import argparse -import base64 -import configparser -import json -import os -import pathlib -import subprocess -import sys -import urllib.parse -import getpass - -# use requests instead of urllib.request for keep-alive connection -import requests - -def init(args): - args.params = urllib.parse.parse_qs(args.url.query) - args.access_token = args.params["accessToken"][0] - args.start_token = args.params["startSigningToken"][0] - args.url = args.params['baseUrl'][0] - - # if missing, get options from section [url] in ~/.margfools - config = configparser.ConfigParser() - config.read(os.path.expanduser('~') + '/.margfools') - if not args.engine: - args.engine = config.get(args.url, 'engine', fallback='file') - - match args.engine: - case 'file': - if not args.keyfile: - args.keyfile = config.get(args.url, 'keyfile', fallback=None) - if not args.certfile: - args.certfile = config.get(args.url, 'certfile', fallback=None) - if not args.keyfile or not args.certfile: - raise Exception('key or certificate file not specified') - args.cert = ''.join(line.strip() for line in open(args.certfile) if not line.startswith('-----')) - case 'pkcs11': - if not args.id: - args.id = config.get(args.url, 'id', fallback=None) - if not args.id: - raise Exception('key ID not specified') - args.cert = base64.b64encode(subprocess.run(['pkcs11-tool', '--read-object', '--type', 'cert', '--id', args.id], capture_output=True).stdout).decode() - args.pin = getpass.getpass('PIN: ') - case '_': - raise Exception(f'invalid engine {args.engine}') - -def sign(b64data, args): - match args.engine: - case 'file': - if not args.keyfile: - raise Exception('keyfile not specified') - cmd = ['openssl', 'pkeyutl', '-sign', '-inkey', args.keyfile, '-pkeyopt', 'digest:sha256'] - env = None - data = base64.b64decode(b64data) - case 'pkcs11': - if not args.id: - raise Exception('key ID not specified') - digest_info = { # from RFC 3447 - 'MD2': '3020300c06082a864886f70d020205000410', - 'MD5': '3020300c06082a864886f70d020505000410', - 'SHA-1': '3021300906052b0e03021a05000414', - 'SHA-256': '3031300d060960864801650304020105000420', - 'SHA-384': '3041300d060960864801650304020205000430', - 'SHA-512': '3051300d060960864801650304020305000440' - } - cmd = ['pkcs11-tool', '--id', args.id, '-s', '-m', 'RSA-PKCS', '-p', 'env:PIN'] - env = {'PIN': args.pin} - data = bytes.fromhex(digest_info['SHA-256']) + base64.b64decode(b64data) - case '_': - raise Exception(f'invalid engine {args.engine}') - - p = subprocess.run(cmd, env=env, input=data, capture_output=True) - if p.returncode != 0: - raise Exception(f'could not sign data: {p.stderr.decode()}') - - return base64.b64encode(p.stdout).decode() - -if __name__ == '__main__': - parser = argparse.ArgumentParser(description='Fake the MargTools application.') - parser.add_argument('url', type=urllib.parse.urlparse, help='bc-digsign:// url') - parser.add_argument('-e', '--engine', choices=('file', 'pkcs11'), help='use key file or PKCS11 token?') - parser.add_argument('-k', '--keyfile', type=pathlib.Path, help='key file') - parser.add_argument('-c', '--certfile', type=pathlib.Path, help='certificate file') - parser.add_argument('-i', '--id', type=int, metavar='<KEY ID>', help='key ID on PKCS11 token') - args = parser.parse_args() - - try: - # parse query string and load certificates - init(args) - - session = requests.Session() - headers = {'Authorization': f'Bearer {args.access_token}'} - - # delete old signing session - r = session.delete(f'{args.url}/signatures/{args.params["startSigningToken"][0]}', headers=headers) - - # register a certificate or sign a document, makes no difference to us - if args.params.get('registerCertificate'): - q = {'registerCertificate': 1} - else: - q = {'documentId': [i for i in args.params['documentId'][0].split(',')]} - qs = urllib.parse.urlencode(q, doseq=True) - r = session.post(f'{args.url}/signatures?{qs}', headers=headers) - - # get signature request and mix in my secrets and publics - request = json.loads(r.text) - request['AuthenticationToken'] = args.access_token - request['CertificatePublicKey'] = args.cert - - # keep signing whatever they send us - while True: - for name in ('AttachmentHashes', 'XmlHashes'): - if values := request.get(name, []): - request[f'Signed{name}'] = [sign(v, args) for v in values] - - r = session.put(f'{args.url}signatures/{request["SignatureRequestId"]}', - headers=headers | {'Content-Type': 'application/json; charset=utf-8'}, - data=json.dumps(request).encode()) - if not r.text: - break - request |= json.loads(r.text) - - except Exception as ex: - print(f'error: {ex}', file=sys.stderr) - input('press enter to exit') # don’t close terminal immediately on fail |