How To Fix SAML2078 - Authentication failed: Error during SAML 2.0 logon

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 078

• Message text: Authentication failed: Error during SAML 2.0 logon

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2078 - Authentication failed: Error during SAML 2.0 logon ?

  The SAP error message SAML2078: Authentication failed: Error during SAML 2.0 logon typically indicates that there was an issue during the SAML (Security Assertion Markup Language) authentication process. This error can arise from various causes, and understanding these can help in troubleshooting and resolving the issue.
  Possible Causes
  
  
  Configuration Issues:
  
  Incorrect configuration of the SAML Identity Provider (IdP) or Service Provider (SP).
  Mismatched entity IDs or endpoints between the IdP and SP.
  Incorrectly configured certificates or keys used for signing/encrypting SAML assertions.
  
  
  
  User Credentials:
  
  The user may not exist in the IdP or may not have the necessary permissions.
  The user’s credentials may be incorrect or expired.
  
  
  
  Network Issues:
  
  Network connectivity problems between the SAP system and the IdP.
  Firewall or proxy settings blocking the SAML requests/responses.
  
  
  
  SAML Assertion Issues:
  
  The SAML assertion may be malformed or missing required attributes.
  The assertion may be expired or not yet valid.
  
  
  
  Time Synchronization:
  
  Time discrepancies between the SAP system and the IdP can lead to issues with assertion validity.
  
  
  
  Solutions
  
  
  Check Configuration:
  
  Verify the SAML configuration in both the SAP system and the IdP. Ensure that the entity IDs, endpoints, and certificates are correctly set up.
  Ensure that the SAML settings in the SAP system (transaction SAML2) are correctly configured.
  
  
  
  Validate User Credentials:
  
  Confirm that the user exists in the IdP and has the necessary permissions to authenticate.
  Check if the user’s credentials are valid and not expired.
  
  
  
  Network Troubleshooting:
  
  Test the network connectivity between the SAP system and the IdP.
  Check firewall and proxy settings to ensure that SAML requests and responses can pass through.
  
  
  
  Inspect SAML Assertions:
  
  Use tools like SAML-tracer or browser developer tools to inspect the SAML assertions being sent and received.
  Ensure that the assertions contain the required attributes and are correctly formatted.
  
  
  
  Time Synchronization:
  
  Ensure that the system clocks of the SAP system and the IdP are synchronized. This can often be done using NTP (Network Time Protocol).
  
  
  
  Logs and Traces:
  
  Check the SAP system logs (transaction SLG1) for more detailed error messages related to SAML authentication.
  Review the IdP logs for any errors or warnings that may provide additional context.
  
  
  
  Related Information
  
  SAP Documentation: Refer to the official SAP documentation for SAML configuration and troubleshooting.
  SAML Tools: Utilize SAML debugging tools to analyze SAML requests and responses.
  Community Forums: Engage with SAP community forums or support channels for additional insights and shared experiences from other users.
  
  By systematically checking these areas, you should be able to identify the root cause of the SAML2078 error and implement the necessary fixes.