How To Fix 00772 - Syntax error in received X.509 client certificate (Base64 encoding)

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 772

• Message text: Syntax error in received X.509 client certificate (Base64 encoding)

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 00772 - Syntax error in received X.509 client certificate (Base64 encoding) ?

  The SAP error message "00772 Syntax error in received X.509 client certificate (Base64 encoding)" typically indicates that there is an issue with the X.509 client certificate being used for authentication. This error can occur in scenarios where secure communication is established using SSL/TLS, and the client certificate is not properly formatted or is corrupted.
  Causes:
  
  Malformed Certificate: The X.509 certificate may not be correctly formatted in Base64 encoding. This can happen if the certificate was improperly generated or modified.
  Incorrect Certificate Chain: If the certificate is part of a chain, the intermediate or root certificates may not be correctly included or trusted.
  Encoding Issues: The certificate may have been encoded incorrectly, leading to syntax errors when SAP tries to read it.
  Expired or Revoked Certificate: The certificate may have expired or been revoked, leading to issues during the authentication process.
  Configuration Issues: There may be misconfigurations in the SAP system regarding SSL settings or the trust store.
  
  Solutions:
  
  Check Certificate Format: Ensure that the X.509 certificate is in the correct Base64 format. It should start with -----BEGIN CERTIFICATE----- and end with -----END CERTIFICATE-----.
  Re-generate the Certificate: If the certificate is malformed, consider re-generating it using a trusted Certificate Authority (CA) or a proper tool.
  Verify Certificate Chain: Ensure that all necessary certificates in the chain (intermediate and root) are correctly installed and trusted in the SAP system.
  Check Expiration: Verify that the certificate has not expired. If it has, obtain a new certificate.
  Review SAP SSL Configuration: Check the SSL configuration in the SAP system, including the trust store and any relevant parameters in the instance profile.
  Use OpenSSL for Validation: You can use OpenSSL to validate the certificate and check for any issues. For example, you can run:
  openssl x509 -in your_certificate.crt -text -noout
  This command will display the details of the certificate and help identify any issues.
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant notes or updates regarding this error message, as there may be specific patches or configurations recommended by SAP.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for SSL configuration and X.509 certificate management.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Security Best Practices: Follow best practices for managing certificates, including regular updates and audits of your certificate infrastructure.
  
  By addressing the above points, you should be able to resolve the "00772 Syntax error in received X.509 client certificate (Base64 encoding)" error in your SAP environment.