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When trying to connect to an endpoint with a certificate of a custom certificate authority, stored in the macOS keychain, Python generally raises errors like SSL: CERTIFICATE_VERIFY_FAILED.

They can be avoided by exporting the certs locally, and pointing modules like urllib2 or requests to it:

security export -t certs -f pemseq -k keychain.login > ~/keychain.pem
security export -t certs -f pemseq -k /Library/Keychains/System.keychain >> ~/keychain.pem
security export -t certs -f pemseq -k /System/Library/Keychains/SystemRootCertificates.keychain >> ~/keychain.pem

export REQUESTS_CA_BUNDLE="$HOME/keychain.pem"

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#!/usr/bin/env python
# This script generates an example HTML form that can directly upload files to
# an S3 bucket at cloudscale.ch.
#
# Based on the following work:
#
# - http://archive.is/fZdSu
# - http://archive.is/NXQno
#
# Requires Python 3 and boto3 to work:

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#!/usr/bin/env bash

path="$1"
set -eu

if [ -z "$path" ]; then
    echo "Please pass an install directory"
    exit 1
fi

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import click

from suitable import Api
from textwrap import dedent


@click.command()
@click.argument('hostname')
def upgrade_puppet(hostname):
    """ Upgrades a puppet client from puppet 3.8 to 4.x. """

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""" Simple redirects for renamed paths using a generic redirect model.

For static paths:

    @App.path('/old-path')
    class OldPathRedirect(Redirect):
        to = '/new-path'

For wildcard paths (e.g. /old-pages/my-page to /new-pages/my-page):

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#!/usr/bin/python3

""" Checks exported 1password urls against the domains affected by Cloudbleed.

Usage:

    1. Export the 1password urls (as csv containing *only* the url column!!).
    2. Store the exported file in the current directory as 'export.csv'.
    3. Run python3 ./cloudbleed.py

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import transaction

from pony.orm import Database, PrimaryKey, Required
from pony.orm.core import DBSessionContextManager
from pony.orm.core import commit, flush, rollback


class CustomDBSessionContextManager(DBSessionContextManager):

    def _enter(self, *args, **kwargs):

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# adapted from Java:
# https://github.com/Yubico/yubikey-salesforce-client/blob/
# e38e46ee90296a852374a8b744555e99d16b6ca7/src/classes/Modhex.cls

ALPHABET = 'cbdefghijklnrtuv'


def yubikey_otp_to_serial(otp):
    """ Takes a Yubikey OTP and calculates the serial number of the key.

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buildout.cfg:

[py]
recipe = zc.recipe.egg
...
interpreter = py
initialization =
    import sys, os

    try:

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import inspect
import morepath
import os

from webob import static


class App(morepath.App):

    @property