Werk #5756: check_mk_agent.linux, check_mk_agent.openwrt: specify message digest for encrypted agent output explicitly
| Component | Checks & agents | ||||||
| Title | check_mk_agent.linux, check_mk_agent.openwrt: specify message digest for encrypted agent output explicitly | ||||||
| Date | Apr 18, 2018 | ||||||
| Level | Trivial Change | ||||||
| Class | Bug Fix | ||||||
| Compatibility | Compatible - no manual interaction needed | ||||||
| Checkmk versions & editions |
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For encrypted agent output the default message digest algorithm of OpenSSL was used before. Prior to OpenSSL 1.1 the default is MD5 which is what the Check_MK server is expecting as well. Starting from OpenSSL 1.1. the default message digest algorithm changed to SHA-256 which leads to problems in the communication between hosts with a new OpenSSL version and the Check_MK server. Now the message digest algorithm is specified explicitly as MD5 to circumvent any ambiguity.