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2to3	96 B	-rwxr-xr-x	2024-03-19 22:46
README	4.46 KB	-rw-r--r--	2024-03-19 22:46
abitype.py	5.44 KB	-rwxr-xr-x	2024-03-19 22:46
analyze_dxp.py	4.08 KB	-rw-r--r--	2024-03-19 22:46
byext.py	3.81 KB	-rwxr-xr-x	2024-03-19 22:46
byteyears.py	1.61 KB	-rwxr-xr-x	2024-03-19 22:46
checkpip.py	793 B	-rwxr-xr-x	2024-03-19 22:46
cleanfuture.py	8.42 KB	-rwxr-xr-x	2024-03-19 22:46
combinerefs.py	4.35 KB	-rwxr-xr-x	2024-03-19 22:46
copytime.py	663 B	-rwxr-xr-x	2024-03-19 22:46
crlf.py	632 B	-rwxr-xr-x	2024-03-19 22:46
db2pickle.py	3.54 KB	-rwxr-xr-x	2024-03-19 22:46
diff.py	2.2 KB	-rwxr-xr-x	2024-03-19 22:46
dutree.doc	2.18 KB	-rw-r--r--	2024-03-19 22:46
dutree.py	1.6 KB	-rwxr-xr-x	2024-03-19 22:46
eptags.py	1.54 KB	-rwxr-xr-x	2024-03-19 22:46
find-uname.py	1.18 KB	-rwxr-xr-x	2024-03-19 22:46
find_recursionlimit.py	3.9 KB	-rwxr-xr-x	2024-03-19 22:46
finddiv.py	2.48 KB	-rwxr-xr-x	2024-03-19 22:46
findlinksto.py	1.05 KB	-rwxr-xr-x	2024-03-19 22:46
findnocoding.py	2.88 KB	-rwxr-xr-x	2024-03-19 22:46
fixcid.py	9.93 KB	-rwxr-xr-x	2024-03-19 22:46
fixdiv.py	13.91 KB	-rwxr-xr-x	2024-03-19 22:46
fixheader.py	1.33 KB	-rwxr-xr-x	2024-03-19 22:46
fixnotice.py	2.96 KB	-rwxr-xr-x	2024-03-19 22:46
fixps.py	892 B	-rwxr-xr-x	2024-03-19 22:46
generate_opcode_h.py	2.17 KB	-rw-r--r--	2024-03-19 22:46
generate_stdlib_module_names.py	4.55 KB	-rw-r--r--	2024-03-19 22:46
generate_token.py	6.81 KB	-rwxr-xr-x	2024-03-19 22:46
get-remote-certificate.py	2.25 KB	-rwxr-xr-x	2024-03-19 22:46
google.py	501 B	-rwxr-xr-x	2024-03-19 22:46
gprof2html.py	2.25 KB	-rwxr-xr-x	2024-03-19 22:46
highlight.py	8.95 KB	-rwxr-xr-x	2024-03-19 22:46
idle3	96 B	-rwxr-xr-x	2024-03-19 22:46
ifdef.py	3.62 KB	-rwxr-xr-x	2024-03-19 22:46
import_diagnostics.py	999 B	-rwxr-xr-x	2024-03-19 22:46
lfcr.py	640 B	-rwxr-xr-x	2024-03-19 22:46
linktree.py	2.38 KB	-rwxr-xr-x	2024-03-19 22:46
lll.py	748 B	-rwxr-xr-x	2024-03-19 22:46
mailerdaemon.py	7.85 KB	-rwxr-xr-x	2024-03-19 22:46
make_ctype.py	2.23 KB	-rwxr-xr-x	2024-03-19 22:46
md5sum.py	2.46 KB	-rwxr-xr-x	2024-03-19 22:46
mkreal.py	1.59 KB	-rwxr-xr-x	2024-03-19 22:46
ndiff.py	3.73 KB	-rwxr-xr-x	2024-03-19 22:46
nm2def.py	2.42 KB	-rwxr-xr-x	2024-03-19 22:46
objgraph.py	5.8 KB	-rwxr-xr-x	2024-03-19 22:46
parse_html5_entities.py	3.91 KB	-rwxr-xr-x	2024-03-19 22:46
parseentities.py	1.7 KB	-rwxr-xr-x	2024-03-19 22:46
patchcheck.py	10.51 KB	-rwxr-xr-x	2024-03-19 22:46
pathfix.py	6.63 KB	-rwxr-xr-x	2024-03-19 22:46
pdeps.py	3.91 KB	-rwxr-xr-x	2024-03-19 22:46
pep384_macrocheck.py	4.61 KB	-rw-r--r--	2024-03-19 22:46
pickle2db.py	3.93 KB	-rwxr-xr-x	2024-03-19 22:46
pindent.py	16.73 KB	-rwxr-xr-x	2024-03-19 22:46
ptags.py	1.28 KB	-rwxr-xr-x	2024-03-19 22:46
pydoc3	80 B	-rwxr-xr-x	2024-03-19 22:46
pysource.py	3.77 KB	-rwxr-xr-x	2024-03-19 22:46
reindent-rst.py	279 B	-rwxr-xr-x	2024-03-19 22:46
reindent.py	11.37 KB	-rwxr-xr-x	2024-03-19 22:46
rgrep.py	1.54 KB	-rwxr-xr-x	2024-03-19 22:46
run_tests.py	1.78 KB	-rw-r--r--	2024-03-19 22:46
serve.py	1.2 KB	-rwxr-xr-x	2024-03-19 22:46
smelly.py	4.9 KB	-rwxr-xr-x	2024-03-19 22:46
stable_abi.py	21.09 KB	-rwxr-xr-x	2024-03-19 22:46
suff.py	510 B	-rwxr-xr-x	2024-03-19 22:46
texi2html.py	68.72 KB	-rwxr-xr-x	2024-03-19 22:46
untabify.py	1.27 KB	-rwxr-xr-x	2024-03-19 22:46
update_file.py	762 B	-rw-r--r--	2024-03-19 22:46
var_access_benchmark.py	11.63 KB	-rw-r--r--	2024-03-19 22:46
verify_ensurepip_wheels.py	3.31 KB	-rwxr-xr-x	2024-03-19 22:46
which.py	1.65 KB	-rwxr-xr-x	2024-03-19 22:46
win_add2path.py	1.62 KB	-rw-r--r--	2024-03-19 22:46

Rename

#!/usr/bin/env python3
#
# fetch the certificate that the server(s) are providing in PEM form
#
# args are HOST:PORT [, HOST:PORT...]
#
# By Bill Janssen.

import re
import os
import sys
import tempfile

def fetch_server_certificate (host, port):

def subproc(cmd):
        from subprocess import Popen, PIPE, STDOUT, DEVNULL
        proc = Popen(cmd, stdout=PIPE, stderr=STDOUT, stdin=DEVNULL)
        status = proc.wait()
        output = proc.stdout.read()
        return status, output

def strip_to_x509_cert(certfile_contents, outfile=None):
        m = re.search(br"^([-]+BEGIN CERTIFICATE[-]+[\r]*\n"
                      br".*[\r]*^[-]+END CERTIFICATE[-]+)$",
                      certfile_contents, re.MULTILINE | re.DOTALL)
        if not m:
            return None
        else:
            tn = tempfile.mktemp()
            with open(tn, "wb") as fp:
                fp.write(m.group(1) + b"\n")
            try:
                tn2 = (outfile or tempfile.mktemp())
                cmd = ['openssl', 'x509', '-in', tn, '-out', tn2]
                status, output = subproc(cmd)
                if status != 0:
                    raise RuntimeError('OpenSSL x509 failed with status %s and '
                                       'output: %r' % (status, output))
                with open(tn2, 'rb') as fp:
                    data = fp.read()
                os.unlink(tn2)
                return data
            finally:
                os.unlink(tn)

cmd = ['openssl', 's_client', '-connect', '%s:%s' % (host, port), '-showcerts']
    status, output = subproc(cmd)

if status != 0:
        raise RuntimeError('OpenSSL connect failed with status %s and '
                           'output: %r' % (status, output))
    certtext = strip_to_x509_cert(output)
    if not certtext:
        raise ValueError("Invalid response received from server at %s:%s" %
                         (host, port))
    return certtext

if __name__ == "__main__":
    if len(sys.argv) < 2:
        sys.stderr.write(
            "Usage:  %s HOSTNAME:PORTNUMBER [, HOSTNAME:PORTNUMBER...]\n" %
            sys.argv[0])
        sys.exit(1)
    for arg in sys.argv[1:]:
        host, port = arg.split(":")
        sys.stdout.buffer.write(fetch_server_certificate(host, int(port)))
    sys.exit(0)