How To Fix 1S542 - Verification of certificate chain failed

SAP Error Message - Details

• Message type: E = Error

• Message class: 1S - Messages for SSF ("Secure Store & Forward")

• Message number: 542

• Message text: Verification of certificate chain failed

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 1S542 - Verification of certificate chain failed ?

  The SAP error message 1S542: Verification of certificate chain failed typically indicates an issue with the SSL/TLS certificate chain used for secure communications. This error can occur in various scenarios, such as when connecting to an SAP system or when using web services that require SSL.
  Causes:
  
  Invalid Certificate Chain: The certificate chain may be incomplete or invalid. This can happen if intermediate certificates are missing or if the root certificate is not trusted.
  Expired Certificates: One or more certificates in the chain may have expired.
  Self-Signed Certificates: If a self-signed certificate is used, it may not be trusted by the client or server.
  Incorrect Configuration: The SSL configuration in the SAP system or the client may not be set up correctly.
  Certificate Revocation: The certificate may have been revoked, and the system is unable to verify its validity.
  
  Solutions:
  
  
  Check Certificate Chain:
  
  Ensure that the complete certificate chain is installed on the server. This includes the server certificate, any intermediate certificates, and the root certificate.
  Use tools like OpenSSL to verify the certificate chain.
  
  
  
  Update Certificates:
  
  If any certificates are expired, replace them with valid ones.
  If using self-signed certificates, consider using certificates from a trusted Certificate Authority (CA).
  
  
  
  Trust Store Configuration:
  
  Ensure that the root and intermediate certificates are added to the trust store of the SAP system or the client application.
  In SAP, you can manage certificates using transaction STRUST.
  
  
  
  Check SSL Configuration:
  
  Review the SSL configuration settings in the SAP system. Ensure that the SSL protocol and cipher suites are correctly configured.
  Check the parameters in the SAP profile related to SSL.
  
  
  
  Certificate Revocation List (CRL):
  
  Ensure that the system can access the CRL to check for revoked certificates. If the CRL is not accessible, it may lead to verification failures.
  
  
  
  Logs and Traces:
  
  Check the SAP system logs and traces for more detailed error messages that can provide additional context about the failure.
  
  
  
  Related Information:
  
  Transaction STRUST: This transaction is used to manage SSL certificates in SAP. You can view, import, and export certificates here.
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to SSL and certificate verification.
  Documentation: Refer to SAP's official documentation on SSL configuration and certificate management for detailed guidance.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP Basis team or consulting SAP support for further assistance.