How To Fix SAML2165 - Can't encrypt string: '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 165

• Message text: Can't encrypt string: '&1'

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 SAML2165 - Can't encrypt string: '&1' ?

  The SAP error message SAML2165, which states "Can't encrypt string: '&1'", typically occurs in the context of Single Sign-On (SSO) configurations using SAML (Security Assertion Markup Language). This error indicates that the system is unable to encrypt a specific string, which is often related to issues with the encryption keys or the configuration of the SAML setup.
  Causes:
  
  Missing or Incorrect Key Configuration: The encryption keys required for SAML assertions may not be properly configured or may be missing.
  Invalid Key Length: The key length used for encryption may not meet the required standards or may be incompatible with the encryption algorithm.
  Certificate Issues: The certificate used for encryption may be expired, invalid, or not properly imported into the SAP system.
  System Configuration Issues: There may be misconfigurations in the SAML settings or the Identity Provider (IdP) settings.
  Unsupported Characters: The string that is being encrypted may contain unsupported characters or formatting issues.
  
  Solutions:
  
  
  Check Key Configuration:
  
  Ensure that the encryption keys are correctly configured in the SAP system. This includes checking the key length and the algorithm used.
  Verify that the keys are correctly imported and accessible by the SAP system.
  
  
  
  Review Certificates:
  
  Check the validity of the certificates used for encryption. Ensure that they are not expired and are correctly imported into the SAP system.
  If necessary, re-import the certificates or generate new ones.
  
  
  
  Validate SAML Configuration:
  
  Review the SAML configuration settings in the SAP system and ensure that they match the settings provided by the Identity Provider (IdP).
  Ensure that the SAML assertion settings are correctly configured, including the encryption settings.
  
  
  
  Check for Unsupported Characters:
  
  Review the string that is causing the error for any unsupported characters or formatting issues. Ensure that it conforms to the expected format.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes or updates related to SAML and encryption issues. There may be specific patches or updates that address this error.
  
  
  
  Debugging:
  
  If the issue persists, consider enabling debugging for SAML to gather more detailed logs that can help identify the root cause of the encryption failure.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation on SAML and SSO configurations for detailed guidance on setting up and troubleshooting SAML.
  SAP Community: Engage with the SAP Community forums to seek advice from other users who may have encountered similar issues.
  SAP Support: If the problem cannot be resolved, consider reaching out to SAP Support for assistance, providing them with detailed logs and configuration settings.
  
  By following these steps, you should be able to identify and resolve the cause of the SAML2165 error in your SAP environment.