How To Fix WSS042 - Missing credential. Specify signature PSE for message protection.

SAP Error Message - Details

• Message type: E = Error

• Message class: WSS - Web Services Security

• Message number: 042

• Message text: Missing credential. Specify signature PSE for message protection.

Self-Explanatory Message

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• What is the cause and solution for SAP error message WSS042 - Missing credential. Specify signature PSE for message protection. ?

  SAP Error Message:
  
  WSS042 Missing credential. Specify signature PSE for message protection.
  
  Cause:
  This error occurs in SAP Web Services Security (WS-Security) scenarios when the system expects a digital signature to be applied to the SOAP message, but the required signature credentials (PSE - Personal Security Environment) are not specified or missing. Essentially, the system is configured to require message protection (signing), but the signature PSE is not defined or not accessible.
  Common causes include:
  
  The PSE for signing is not created or imported in the SAP system.
  The PSE is not assigned/configured in the Web Service configuration.
  The SOAP message is expected to be signed, but the signature credentials are missing.
  Incorrect or missing configuration in the WS-Security profile or communication channel.
  The user or system does not have the necessary permissions to access the PSE.
  
  
  Solution:
  
  
  Create or Import the Signature PSE:
  
  Use transaction STRUST to create or import the PSE that contains the private key and certificate used for signing.
  Ensure the PSE is valid and contains the correct certificates.
  
  
  
  Assign the Signature PSE in the Web Service Configuration:
  
  In the SOAMANAGER or Web Service configuration, specify the signature PSE under the security settings.
  For outbound messages, assign the PSE that will be used to sign the SOAP messages.
  For inbound messages, ensure the system expects the correct signature and has the corresponding public key/certificate to verify.
  
  
  
  Check WS-Security Profile Settings:
  
  Verify that the WS-Security profile used for the service or client is correctly configured to use the signature PSE.
  Adjust the profile if necessary to match the security requirements.
  
  
  
  Verify User Permissions:
  
  Ensure the user or service user running the process has authorization to access the PSE.
  
  
  
  Test the Configuration:
  
  After configuration, test the web service call again to confirm that the signature is applied and the error no longer occurs.
  
  
  
  
  Related Information:
  
  Transaction STRUST: Manage PSEs and certificates.
  SOAMANAGER: Web Service configuration and security settings.
  WS-Security: SAP supports WS-Security standards for message integrity and confidentiality.
  SAP Note: Check for any relevant SAP Notes related to WS-Security and PSE issues.
  SAP Help Portal: Documentation on configuring WS-Security in SAP NetWeaver.
  
  
  Summary:
  The error WSS042 Missing credential. Specify signature PSE for message protection. indicates that the system expects a digital signature for the SOAP message but cannot find the required signature PSE. To resolve, create/import the PSE in STRUST, assign it properly in the web service security configuration, and ensure all related settings and permissions are correct.