The problem The scenario was like this: Python code that provides a library and a binary The code is compatible with both Python v2 and
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Multiple relay configuration based on sender address with sendmail
One of the needs that came up was to be able to use separate relay configurations based on the sender email address, using sendmail. The
OpenVPN and remote-cert-tls server
This required a bit of digging into OpenVPN’s and OpenSSL’s code to figure out. The problem This error: Thu Sep 11 00:12:05 2014 Validating certificate
Linux, multicast, bridging and IPv6 troubles (i.e. why my IPv6 connectivity goes missing)
For a long time now I had a very annoying problem with IPv6 under Linux. My setup is as follows: Linux box <-> Switch <->
Installing package build dependencies from a .dsc file (Debian)
There are cases where one needs to install build-dependencies of a .dsc file in Debian. Apparently this is not as trivial as: The easiest way
pyOpenSSL and invalid certificates
I was trying to import some X509v3 certificates that were created with pyOpenSSL to a MikroTik router (RouterOS 6.1) but they were always being imported
Verify that a private key matches a certificate with PyOpenSSL
Verify that a private key matches a certificate using PyOpenSSL and PyCrypto: The idea is to get the modulus from the two DER structures and
Verifying an SSL certificate with python
This one took me a considerable amount of time and had to figure some parts from scratch. Unfortunately there doesn’t seem to exist an easy
X509v3 Authority Key Identifier pains (authorityKeyIdentifier)
“X509v3 Authority Key Identifier” or “authorityKeyIdentifier” is an X509v3 extension that’s added to X509 certificates and identifies the CA that signed the Certificate. I suppose
Raspberry Pi under QEMU
What: Run raspberry pi system under QEMU Why: I wanted to have builder environment for Raspberry PI. Emulating it it much faster that running something