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 | ||||
| Level | Trivial Change | ||||
| Class | New Feature | ||||
| Compatibility | Compatible - no manual interaction needed | ||||
| Checkmk versions & editions |
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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.