This is a common task in pentesting scenarios. This commit adds the following
functions:
utils.Headers.replace
proxy.Request.replace
proxy.Response.replace
flow.Flow.replace
Since OpenSSL doesn't let us set certificate start times in the past, the
client and proxy machine time must be synchronized, or the client might reject
the certificate. We can bodgy over small discrepancies by waiting a few seconds
after a new certificate is generated (i.e. the first time an SSL domain is contacted).
Make this a configurable option, and turn it off by default.
Two different strategies here:
- Use a simple heuristic to detect if we're looking at XML data when indent
mode is used. On non-XML data we can hang even on small documents.
- Only view partial data for large bodies. At the moment the cutoff is
100k. I might finetune this later.
- The OpenSSL x509 has no way to explicitly set the notBefore value on
certificates.
- If two systems have the same configured time, it's possible to return a
certificate before the validity start time has arrived.
- We "solve" this by waiting for one second when a certificate is first
generated before returning the cert. The alternative is to rewrite pretty much
all of our certificate generation, a thought too horrible to contemplate.
We now create three different files in the .mitmproxy directory when a dummy CA
is made:
mitmproxy-ca.pem - the CA, including private key
mitmproxy-ca-cert.p12 - A pkcs12 version of the certificate, for distribution to Windows.
mitmproxy-ca-cert.pem - A PEM version of the certificate, for distribution to everyone else.
- Computing the view of a large body is expensive, so we introduce an LRU cache
to hold the latest 20 results.
- Use ListView more correctly, passing it individual urwid.Text snippets,
rather than a single large one. This hugely improves render time.
- Move option parsing utiliities to proxy.py
- Don't have a global config object. Pass it as an argument to ProxyServer.
- Simplify certificate generation logic.
- Use templates for config files. We can re-introduce customization of the
certificate attributes when we need them.
- Split CA and cert generation into separate functions.
- Generation methods provide an error return when generation fails.
- When the user explicitly specifies a certificate, we don't generate it, but
fail if it doesn't exist.
Also, since BeautifulSoup is so damn slow, print a statusbar message saying
that we're calculating a pretty version of the response. Maybe I should add
hangman or something, becuase on a 200k document this can take ages.
