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Werk #5756: check_mk_agent.linux, check_mk_agent.openwrt: specify message digest for encrypted agent output explicitly

ComponentChecks & Agents
Titlecheck_mk_agent.linux, check_mk_agent.openwrt: specify message digest for encrypted agent output explicitly
Date2018-04-18 15:07:14
Checkmk EditionCheckmk Raw Edition (CRE)
Checkmk Version1.4.0p31,1.6.0b1,1.5.0b2
LevelTrivial Change
ClassBug Fix
CompatibilityCompatible - no manual interaction needed

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.