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 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.4.0p9 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0p35 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0p45 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

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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