How To Fix CLB2660 - No SHA1 signature provided from SSFA

CLB2660 - Overview

• Message type: E = Error

• Message class: CLB2 - SAIL: Common messages

• Message number: 660

• Message text: No SHA1 signature provided from SSFA

What causes this issue?

A call to the service provider required an authentication using the RSA-
SHA1 algorithm. For this a signature has to be retrieved from the SSFA.

System Response

The method execution is canceled.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Check the configuration with transactions <DS:TRAN.SSFA>SSFA</> as well
as the trusted connection settings.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB2660 - No SHA1 signature provided from SSFA ?

  The SAP error message CLB2660: No SHA1 signature provided from SSFA typically occurs in the context of SAP's Secure Store and Forward Architecture (SSFA) when there is an issue with the digital signature of a message or document being processed. This error indicates that the system expected a SHA1 signature for the data being sent or received, but it was not provided.
  
  Cause:
  
  Missing Signature: The most common cause is that the data being processed does not include a SHA1 signature, which is required for validation.
  
  Configuration Issues: There may be misconfigurations in the SSFA settings or in the digital signature setup.
  Data Corruption: The data being transmitted may have been corrupted or altered, leading to the absence of the expected signature.
  Version Mismatch: There could be a mismatch between the versions of the components involved in the signature generation and validation process.
  
  
  Solution:
  
  Check Data Source: Ensure that the data being sent includes a valid SHA1