How To Fix 1S543 - Cannot analyze certificate response

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 543

• Message text: Cannot analyze certificate response

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 1S543 - Cannot analyze certificate response ?

  The SAP error message 1S543: Cannot analyze certificate response typically occurs in the context of Secure Network Communications (SNC) when there is an issue with the SSL/TLS certificate exchange between the SAP system and the external system or service it is trying to communicate with. This error can arise due to various reasons, including misconfiguration, expired certificates, or issues with the certificate chain.
  Causes:
  
  Invalid or Expired Certificate: The certificate being used may be invalid or expired, preventing proper SSL/TLS communication.
  Certificate Chain Issues: The certificate chain may be incomplete or not trusted by the SAP system.
  Configuration Errors: Incorrect SNC or SSL configuration settings in the SAP system or the external system.
  Mismatched Hostnames: The hostname in the certificate does not match the hostname of the server being accessed.
  Unsupported Certificate Format: The certificate may be in a format that is not supported by the SAP system.
  
  Solutions:
  
  Check Certificate Validity: Verify that the certificate is valid and not expired. If it is expired, obtain a new certificate.
  Verify Certificate Chain: Ensure that the entire certificate chain is correctly installed and trusted by the SAP system. This includes root and intermediate certificates.
  Review Configuration: Check the SNC and SSL configuration settings in the SAP system. Ensure that the parameters are correctly set in the instance profile.
  Hostname Verification: Ensure that the hostname in the certificate matches the hostname of the server you are trying to connect to.
  Update Certificates: If the certificate is in an unsupported format, convert it to a supported format (e.g., PEM or DER) and re-import it into the SAP system.
  Check Logs: Review the SAP system logs (transaction SM21) and the SNC logs for more detailed error messages that can provide additional context.
  
  Related Information:
  
  SNC Configuration: Review the SAP documentation on configuring Secure Network Communications (SNC) for detailed steps on setting up SSL/TLS.
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to certificate handling and SNC errors.
  Testing Tools: Use tools like OpenSSL to test the SSL/TLS connection and verify the certificate chain from the command line.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed logs and configuration settings for better diagnosis.