How To Fix TRUST167 - Algorithm &2 &3 &4 is not allowed for this application (&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: TRUST - Certificate Management

• Message number: 167

• Message text: Algorithm &2 &3 &4 is not allowed for this application (&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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message TRUST167 - Algorithm &2 &3 &4 is not allowed for this application (&1) ?

  The SAP error message TRUST167 indicates that a specific cryptographic algorithm is not allowed for the application you are trying to use. This error typically arises in the context of digital signatures, encryption, or secure communications where certain algorithms are restricted due to security policies or compliance requirements.
  Cause:
  The error message is triggered when:
  
  The application (identified by &1) is attempting to use a cryptographic algorithm (identified by &2, &3, &4) that is not permitted.
  This restriction may be due to security policies set in the SAP system, which may disallow certain algorithms for security reasons (e.g., weak algorithms that are no longer considered secure).
  
  Solution:
  To resolve the TRUST167 error, you can take the following steps:
  
  
  Check the Allowed Algorithms:
  
  Review the configuration settings in your SAP system to see which algorithms are allowed for the specific application. This can typically be done in the transaction code STRUST (Trust Manager) or SICF (HTTP Service Hierarchy Maintenance).
  
  
  
  Update the Application Configuration:
  
  If the application can be configured to use a different, allowed algorithm, update its settings accordingly. This may involve changing the cryptographic settings in the application or the relevant configuration files.
  
  
  
  Modify Security Policies:
  
  If you have the necessary permissions and it is deemed safe, you may consider modifying the security policies to allow the use of the specified algorithm. However, this should be done with caution and ideally in consultation with your security team.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to cryptographic algorithms and security settings. SAP Notes may provide specific guidance on which algorithms are supported and how to configure them.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue through configuration changes, consider reaching out to SAP Support for assistance. They can provide insights based on the specific version of SAP you are using and any known issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  STRUST: Trust Manager for managing SSL certificates and cryptographic settings.
  SICF: To manage HTTP services and their security settings.
  
  
  
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide guidance on cryptographic settings.
  
  
  Security Best Practices: Always ensure that the algorithms you are using comply with current security standards and best practices to protect sensitive data.
  
  
  By following these steps, you should be able to identify the cause of the TRUST167 error and implement a solution to resolve it.