cert.py 文件源码

def create_temporary_ca_file(anchor_list):
    """
    Concatenate all the certificates (PEM format for the export) in
    'anchor_list' and write the result to file to a temporary file
    using mkstemp() from tempfile module. On success 'filename' is
    returned, None otherwise.

    If you are used to OpenSSL tools, this function builds a CAfile
    that can be used for certificate and CRL check.

    Also see create_temporary_ca_file().
    """
    try:
        f, fname = tempfile.mkstemp()
        for a in anchor_list:
            s = a.output(fmt="PEM")
            l = os.write(f, s)
        os.close(f)
    except:
        return None
    return fname