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Felix J. Ogris' private homepage: some stuff about homemade software, FreeBSD, Linux, computers, and hacking in general.

Somewhat more nosy? Mailto www@ogris.de.

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recent news

[2023-01-28] LogBlitz version 11 saves selected filenames in a cookie, and uses different cookies for each user.

[2022-12-18] How to get the base64 encoded SHA hash of an existing file:

• Python:

  import hashlib, base64
  print(base64.b64encode(hashlib.sha512(open("/etc/passwd", "rb").read()).digest()))
  

• Perl:

  use Digest::SHA;
  my $b64_sha512 = Digest::SHA->new("sha512")->addfile("/etc/passwd", "b")->b64digest;
  print($b64_sha512, "=" x ((4 - length($b64_sha512) % 4) % 4));
  

• Shell:

  $ openssl sha512 -binary /etc/passwd | openssl base64 -A
  

[2022-12-09] LogBlitz version 10 comes with a performance improvement if you don't search for regular expressions.

[2022-12-04] My new howto Apache and form based login makes use of mod_auth_form.

[2022-11-01]

• New version of check_tvh.py allows you to pass options on the command line, power cycles the USB capture device, and drops support for Python 2
• New version of s3file.py explains the meaning of file flags in the long format output of LS-L and such (see --examples), and adjust shown filenames to the left
• Updated my howto Small Python container for Docker to run as unprivileged user, and to display the correct local time and date.

[2022-10-27] How to create a Small Python container for Docker

[2022-10-19]

• New version of privatebinc.py, which is a simple Python client for PrivateBin, now supports attachments
• cURL and self signed certificates on FreeBSD 13.

[2022-10-18] New version of s3file.py fixes a highly dangerous error in the examples output (DELETE where GET was meant), and has examples for dealing with metadata.

[2022-10-15] New version of check_tvh.py reloads the cuse kernel module as well.

[2022-10-12] My howto pgAdmin 4 on Gentoo now covers the latest version of pgAdmin 4, and explains how to handle updates of Python.

[2022-09-14] LogBlitz version 9 displays its execution time, and adds the name of the current user to the title of the logout link.

[2022-08-30] If you upgrade to LogBlitz version 8, you might configure a logout url.

[2022-08-25]

• New howto: TSIG authenticated zone transfers with Perl and Net::DNS
• How to check whether a given text is a valid base64 encoded string in plain (Postgre)SQL.

[2022-07-31] New howto: Automatic version numbers with Git.

[2022-07-15] Tvhead2TVB version 1.0.1.0 handles activation through a program's info popup correctly, and uses JGoodies as UI library, which comes bundled with TV-Browser.

[2022-06-25] grapheqd version 5 has 3 new features:

• It can read PCM data from an external program, e.g. ffmpeg
• It reopens the sound device in case of a failure
• The RC script for FreeBSD supports profiles, i.e. you can configure multiple instances of grapheqd on the same host.

[2022-06-18] New howto: pgAdmin 4 on Gentoo.

[2022-06-13] Older versions of the ConvertFrom-SecureString cmdlet did not have an -AsPlainText parameter. When you have to use PowerShell prior to version 7, you might use ConvertSecureStringToPlainText.ps1.

[2022-06-06] Gave both s3file.py and nextcron.py their own pages:

• s3file.py
• nextcron.py

[2022-06-05] New version of s3file.py has command shortcuts for:

• creating a bucket
• creating a bucket with object locking
• determining if a bucket has object locking enabled
• setting object locking in compliance or governance mode
• enabling object versioning
• determining if a bucket has object versioning enabled
• disabling object versioning
• determining if a bucket has access logging enabled
• listing all objects in a bucket, optionally with all object versions, human readable filesizes, and/or numeric user ids.

[2022-06-02] LogBlitz version 7 supports pyre2, highlights non-matching lines in case of an inverted search, and contains several optimizations.

[2022-05-26] LogBlitz version 6 allows you to display lines before and after each matching line, and highlights every found query string.

[2022-05-14] LogBlitz version 5 allows you to display line numbers and to restrict users to certain logfiles and subdirectories, stores your current settings in a cookie, and comes with a performance improvement.

[2022-04-28] graypold version 10 uses a new version numbering, and fixes a bug which was introduced in version 0.8 and prevented you from bypassing graylisting for certain senders and/or recipients.

[2022-04-19]

• New version of nextcron.py contains a small optimization and can report its version number.
• LogBlitz version 4 allows you to
  • select logfiles and directories, which names start with a dot,
  • show unreadable logfiles,
  • and specify the logfile's charset in the webinterface.

[2022-03-16] graypold 0.9 does not fail the SPF check anymore if the sender's address is empty

[2022-02-19] New version of s3file.py comes with builtin help and examples, allows you to pass and display HTTP headers, may read credentials from a config file, and supports Python 3 only

[2022-01-16] How to combine Apache and Fail2ban in order to show a nice "access denied" page without blocking the client's ip address

old news

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