How To Fix WL007 - Signature has errors

SAP Error Message - Details

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 007

• Message text: Signature has errors

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 WL007 - Signature has errors ?

  SAP Error Message:
  
  WL007 - Signature has errors
  
  Cause:
  The error message WL007 - Signature has errors typically occurs in SAP when there is a problem with the digital signature verification process. This can happen in scenarios where documents or data are signed digitally (e.g., in workflows, electronic document processing, or when using SAP's digital signature functionalities).
  Common causes include:
  
  The digital signature on the document or data is corrupted or invalid.
  The certificate used for signing is expired, revoked, or not trusted.
  The signature does not match the content (data tampering or mismatch).
  Incorrect or missing configuration of the digital signature verification in SAP.
  Problems with the cryptographic library or hardware security module (HSM) used for signing/verification.
  Time synchronization issues between the signing system and the verification system.
  
  
  Solution:
  To resolve the WL007 - Signature has errors message, consider the following steps:
  
  
  Check the Signature Validity:
  
  Verify that the digital signature on the document or data is intact and has not been altered.
  Use external tools or SAP transaction codes to validate the signature manually.
  
  
  
  Verify Certificates:
  
  Ensure that the certificate used for signing is valid (not expired or revoked).
  Check that the certificate chain is complete and trusted by the SAP system.
  Import or update the relevant certificates in the SAP trust store if necessary.
  
  
  
  Review Configuration:
  
  Check the configuration of the digital signature verification in SAP.
  Ensure that the cryptographic libraries (e.g., SAP Cryptographic Library) are correctly installed and up to date.
  Verify that the system parameters related to digital signatures are correctly set.
  
  
  
  Check System Time:
  
  Ensure that the system clocks of the signing and verifying systems are synchronized to avoid timestamp-related signature errors.
  
  
  
  Re-sign the Document/Data:
  
  If possible, reapply the digital signature to the document or data to ensure it is correctly signed.
  
  
  
  Check for SAP Notes and Patches:
  
  Search for relevant SAP Notes that address known issues with digital signatures in your SAP version.
  Apply any recommended patches or updates.
  
  
  
  Consult Logs and Traces:
  
  Analyze system logs, trace files, or workflow logs to get more detailed information about the signature error.
  
  
  
  
  Related Information:
  
  
  SAP Transactions:
  
  STRUST – Manage certificates and trust settings.
  SICF – Check services related to digital signature.
  SMW0 – Manage workflow logs.
  SOST – Monitor sent documents (if related to email or document sending).
  
  
  
  SAP Components:
  
  Digital signature functionality is often part of SAP NetWeaver, SAP Document Management System (DMS), or SAP Business Workflow.
  Cryptographic Library (CommonCryptoLib) is used for signature operations.
  
  
  
  SAP Notes:
  
  Check SAP Support Portal for notes related to digital signature errors, e.g., notes about WL007 or signature verification issues.
  
  
  
  External Factors:
  
  If using third-party signing tools or hardware tokens, ensure their compatibility and correct integration with SAP.
  
  
  
  
  If the problem persists after these checks, consider raising a support ticket with SAP, providing detailed logs and system information for further analysis.