How To Fix MD5010 - Internal error when calculating HMAC

SAP Error Message - Details

• Message type: E = Error

• Message class: MD5 - Calculate Hash and HMAC Values

• Message number: 010

• Message text: Internal error when calculating HMAC

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 MD5010 - Internal error when calculating HMAC ?

  The SAP error message MD5010, which indicates an "Internal error when calculating HMAC," typically arises in the context of SAP systems that utilize HMAC (Hash-based Message Authentication Code) for securing communications or data integrity. This error can occur due to various reasons, including configuration issues, data inconsistencies, or problems with the underlying cryptographic libraries.
  Causes of MD5010 Error
  
  
  Configuration Issues: Incorrect settings in the SAP system related to security or communication protocols can lead to HMAC calculation failures.
  
  
  Data Inconsistencies: If the data being processed is corrupted or not in the expected format, it can cause the HMAC calculation to fail.
  
  
  Cryptographic Library Issues: Problems with the underlying cryptographic libraries or their configurations can lead to errors in HMAC calculations.
  
  
  System Bugs: There may be bugs in the SAP version you are using that affect HMAC calculations.
  
  
  Missing or Incorrect Keys: If the keys used for HMAC are missing, incorrect, or not properly configured, it can lead to this error.
  
  
  Solutions
  
  
  Check Configuration: Review the configuration settings related to security and HMAC in your SAP system. Ensure that all settings are correct and align with the documentation.
  
  
  Data Validation: Validate the data being processed to ensure it is not corrupted and is in the expected format. Check for any inconsistencies in the data.
  
  
  Update Cryptographic Libraries: Ensure that the cryptographic libraries used by your SAP system are up to date. If there are known issues with the current version, consider applying patches or updates.
  
  
  Review Security Keys: Verify that the HMAC keys are correctly configured and accessible. Ensure that they are not expired or incorrectly set.
  
  
  Check SAP Notes: Look for relevant SAP Notes or Knowledge Base Articles (KBAs) that address the MD5010 error. SAP frequently releases notes that provide fixes or workarounds for known issues.
  
  
  System Logs: Check the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including any logs or steps to reproduce the issue.
  
  
  Related Information
  
  SAP Documentation: Refer to the official SAP documentation for guidance on HMAC configuration and troubleshooting.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  System Updates: Regularly check for system updates and patches that may address known issues related to HMAC and security.
  
  By following these steps, you should be able to diagnose and resolve the MD5010 error in your SAP system.