How To Fix WSS027 - The system received encrypted data, which could not be decrypted.

SAP Error Message - Details

• Message type: E = Error

• Message class: WSS - Web Services Security

• Message number: 027

• Message text: The system received encrypted data, which could not be decrypted.

What causes this issue?

The system received encrypted data in the security header, which failed
to be decrypted.

System Response

Web service processing fails.

How to fix this error?

When receiving encrypted data, the system tries to decrypt. Decryption
may fail for the following reasons:
1) When X.509 certificates are used, the decryption key must be included
in an WS Security identity.
2) When issuer and serial number is used, the representation must be
according to RFC 2253.
3) An unsupported security token containing key material is sent.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WSS027 - The system received encrypted data, which could not be decrypted. ?

  SAP Error Message:
  
  WSS027 - The system received encrypted data, which could not be decrypted.
  
  Cause:
  This error occurs when the SAP system receives data that is supposed to be encrypted, but it fails to decrypt it properly. Common reasons include:
  
  Mismatch in encryption keys or certificates: The sender and receiver do not share the same encryption key or the key used to encrypt the data is not available or recognized by the receiver.
  Incorrect or missing configuration of SSL/TLS or S/MIME: The cryptographic settings on the SAP system or the communicating partner are not aligned.
  Corrupted or altered encrypted data: The encrypted payload might have been tampered with or corrupted during transmission.
  Expired or invalid certificates: The certificates used for encryption/decryption are expired, revoked, or invalid.
  Incorrect usage of cryptographic libraries or parameters: The system might be using incompatible cryptographic algorithms or parameters.
  
  
  Solution:
  To resolve the WSS027 error, consider the following steps:
  
  
  Check Certificates and Keys:
  
  Verify that the encryption certificates and private keys are correctly installed and valid on the SAP system.
  Ensure that the sender and receiver have matching certificates or trust chains.
  Check for expired or revoked certificates and renew or replace them if necessary.
  
  
  
  Verify Configuration:
  
  Review the SSL/TLS or S/MIME configuration in the SAP system (e.g., STRUST, SNC, or Web Service Security settings).
  Ensure that the cryptographic algorithms and parameters match between sender and receiver.
  Confirm that the SAP system is configured to use the correct keystore and truststore.
  
  
  
  Check Data Integrity:
  
  Ensure that the encrypted data is not altered or corrupted during transmission.
  Use network traces or logs to verify the integrity of the data.
  
  
  
  Update Cryptographic Libraries:
  
  Make sure that the SAP system is running on supported and updated cryptographic libraries.
  Apply relevant SAP Notes or patches related to security and encryption.
  
  
  
  Enable Detailed Logging:
  
  Activate detailed logging for Web Service Security or SSL to get more information about the failure.
  Analyze logs to pinpoint the exact cause of the decryption failure.
  
  
  
  Test with Known Good Data:
  
  Try sending encrypted data from a trusted source with known good certificates to isolate the problem.
  
  
  
  
  Related Information:
  
  
  SAP Notes:
  
  Check SAP Notes related to WSS027 or encryption/decryption issues in Web Services or SSL.
  Example: SAP Note 1680201 (related to Web Service Security errors)
  
  
  
  Transaction Codes:
  
  STRUST: Manage SSL certificates and PSEs (Personal Security Environment).
  SMICM: Monitor ICM and SSL traces.
  SICF: Manage Internet Communication Framework services.
  SOAMANAGER: Configure Web Service security settings.
  
  
  
  Documentation:
  
  SAP Help Portal on Web Service Security and SSL configuration.
  SAP Security Guides for configuring SNC and SSL.
  
  
  
  Common Scenarios:
  
  Web Service calls failing due to encryption mismatch.
  SOAP messages with WS-Security headers causing decryption errors.
  Integration scenarios involving external partners with certificate-based encryption.
  
  
  
  
  Summary:
  WSS027 indicates a failure in decrypting received encrypted data, usually due to certificate/key mismatches, configuration errors, or corrupted data. The solution involves verifying certificates, ensuring proper configuration, checking data integrity, and enabling detailed logs to diagnose the root cause.