Werk #15671: SAML: use RSA-SHA256 to sign authentication requests
|Component||Setup, site management|
|Title||SAML: use RSA-SHA256 to sign authentication requests|
|Date||Apr 24, 2023|
|Checkmk Edition||Checkmk Enterprise (CEE)|
|Checkmk Version||2.3.0b1 2.2.0b7|
|Compatibility||Compatible - no manual interaction needed|
Checkmk would sign its authentication requests with RSA-SHA512. However, some identity providers (e.g. some versions of Microsoft ADFS) do not support any signature algorithms beyond SHA256. As a result, the authentication requests would be rejected with an error message similar to
"Error details: MSIS7093: The message is not signed with expected signature algorithm. Message is signed with signature algorithm http://www.w3.org/2001/04/xmldsig-more#rsa-sha512. Expected signature algorithm http://www.w3.org/2001/04/xmldsig-more#rsa-sha256."
For this reason, Checkmk now uses RSA-SHA256 to sign its authentication requests.