Werk #15367: Special characters in passwords in password store are now fully supported with active checks written in c

Component

Checks & agents

Title

Special characters in passwords in password store are now fully supported with active checks written in c

Date

Jul 14, 2025

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.5.0b1	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p9	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.3.0p35	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.2.0p45	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

When using special characters in passwords stored in the password store for an active check that is implemented in c (for example the legacy active check check_http) the following error message was shown:

Invalid --pwstore= option: Password is too long for argument.

This was due to the c implementation calculated the length of the password in UTF-8 encoded bytes, but the python implementation counted UTF characters.

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