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From: Alexey Gladkov <legion@altlinux.ru>
To: ALT Devel discussion list <devel@lists.altlinux.org>
Subject: [devel] [PATCH 0/6] sysklogd: implement checkum chains for log entries
Date: Tue, 27 Oct 2020 12:33:45 +0100
Message-ID: <20201027113351.3373843-1-legion@altlinux.ru> (raw)

Привет!

Этот патчсет реализовывает цепочки хэшей для записей в логе. Это позволяет
обнаружить возможное втрожение в логи.

При старте syslogd считает хэш для каждой записи используя хэш предыдущей
записи или пустой, если это первая запись в лог после старта. Цепочка не
прерывается до остановки сервера или перекофигруции.

Наследование чексумм между рестартами не сделано намеренно поскольку у сервера
нет возможности сохранить и гарантировать неприкосновенность чексуммы между
рестартами.

Рестарт syslogd, как и нарушение цепочки чексумм, считается поводом для
расследования.

Реализация sha256 (каталог block/) взята из git.

Alexey Gladkov (6):
  Optimize the filling of the record fields
  syslogd: make logerror is printf-like
  syslogd: Implement customization of log file records
  syslogd: no need to try to substitute a field in a record if it's not
    in the log_format
  Makefile: use make variables instead of a hardcoded list
  syslogd: implement checksum chains for log entries

 Makefile                         |  24 +-
 block/bswap.h                    | 217 ++++++++++++++++
 block/sha256.c                   | 202 +++++++++++++++
 block/sha256.h                   |  24 ++
 hash.h                           |  66 +++++
 syslog.conf                      |  17 ++
 syslogd.c                        | 419 +++++++++++++++++++++++++------
 tests/log-hashes/.gitignore      |   5 +
 tests/log-hashes/check           |  28 +++
 tests/log-hashes/check-hashes.sh |  28 +++
 10 files changed, 950 insertions(+), 80 deletions(-)
 create mode 100644 block/bswap.h
 create mode 100644 block/sha256.c
 create mode 100644 block/sha256.h
 create mode 100644 hash.h
 create mode 100644 tests/log-hashes/.gitignore
 create mode 100755 tests/log-hashes/check
 create mode 100755 tests/log-hashes/check-hashes.sh

-- 
2.25.4



             reply	other threads:[~2020-10-27 11:33 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-27 11:33 Alexey Gladkov [this message]
2020-10-27 11:33 ` [devel] [PATCH 1/6] Optimize the filling of the record fields Alexey Gladkov
2020-10-27 11:33 ` [devel] [PATCH 2/6] syslogd: make logerror is printf-like Alexey Gladkov
2020-10-27 11:33 ` [devel] [PATCH 3/6] syslogd: Implement customization of log file records Alexey Gladkov
2020-10-27 11:33 ` [devel] [PATCH 4/6] syslogd: no need to try to substitute a field in a record if it's not in the log_format Alexey Gladkov
2020-10-27 11:33 ` [devel] [PATCH 5/6] Makefile: use make variables instead of a hardcoded list Alexey Gladkov
2020-10-27 11:33 ` [devel] [PATCH 6/6] syslogd: implement checksum chains for log entries Alexey Gladkov
2020-10-27 11:44 ` [devel] [PATCH 0/6] sysklogd: implement checkum " Alexey V. Vissarionov
2020-10-27 12:13   ` Alexey Gladkov

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