UnicodeError thrown by cryptography when --certinfo_ca_file is encoded with UTF-8

Describe the bug UnicodeError is thrown when sslyze parses my system's CA certificate authority list.

Here are the problematic bytes in ca-bundle.crt. They are in the file because their CA's DN has non-ascii characters in it, and the UTF-8 encoding is tripping up cryptography.

(sslyze currently requires cryptography <43,>42 so maybe this is fixed in a later cryptography version, I will check this later and update.)

00021ca0  2d 2d 2d 2d 45 4e 44 20  43 45 52 54 49 46 49 43  |----END CERTIFIC|
00021cb0  41 54 45 2d 2d 2d 2d 2d  0a 0a 23 20 4e 65 74 4c  |ATE-----..# NetL|
00021cc0  6f 63 6b 20 41 72 61 6e  79 20 28 43 6c 61 73 73  |ock Arany (Class|
00021cd0  20 47 6f 6c 64 29 20 46  c5 91 74 61 6e c3 ba 73  | Gold) F..tan..s|
00021ce0  c3 ad 74 76 c3 a1 6e 79  0a 2d 2d 2d 2d 2d 42 45  |..tv..ny.-----BE|
00021cf0  47 49 4e 20 43 45 52 54  49 46 49 43 41 54 45 2d  |GIN CERTIFICATE-|
00021d00  2d 2d 2d 2d 0a 4d 49 49  45 46 54 43 43 41 76 32  |----.MIIEFTCCAv2|

You'll see the offset 0x21cd8 being mentioned in the exception below (in decimal, as 138456).

$ uvx sslyze --certinfo_ca_file=/etc/pki/tls/certs/ca-bundle.crt --certinfo token.actions.githubusercontent.com
[...]
 * Error when running --certinfo:
       You can open an issue at https://github.com/nabla-c0d3/sslyze/issues with the following information:

       * SSLyze version: 6.0.0
       * Server: token.actions.githubusercontent.com:443 - 140.82.112.22
       * Scan command: ScanCommand.CERTIFICATE_INFO

       Traceback (most recent call last):
         File "/home/sam/.local/share/uv/tools/sslyze/lib64/python3.12/site-packages/sslyze/scanner/_mass_scanner.py", line 279, in _generate_result_for_completed_server_scan
    scan_cmd_result = plugin_implementation_cls.result_for_completed_scan_jobs(
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/home/sam/.local/share/uv/tools/sslyze/lib64/python3.12/site-packages/sslyze/plugins/certificate_info/implementation.py", line 130, in result_for_completed_scan_jobs
    all_trust_stores.append(TrustStore(custom_ca_file, "Supplied CA file", "N/A"))
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/home/sam/.local/share/uv/tools/sslyze/lib64/python3.12/site-packages/sslyze/plugins/certificate_info/trust_stores/trust_store.py", line 55, in __init__
    self._x509_store = Store(load_pem_x509_certificates(self.path.read_text().encode("ascii")))
                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       UnicodeEncodeError: 'ascii' codec can't encode character '\u0151' in position 138456: ordinal not in range(128)

To Reproduce Steps to reproduce the behavior:

Install uv
Run the following command uvx sslyze --certinfo_ca_file=/etc/pki/tls/certs/ca-bundle.crt --certinfo token.actions.githubusercontent.com
See error

Expected behavior No exception

Python environment (please complete the following information):

OS: Fedora 40
Python version: 3.12.7

nabla-c0d3 / sslyze

UnicodeError thrown by cryptography when --certinfo_ca_file is encoded with UTF-8 #670