How To Fix WSS019 - Signature check failed - WP: &1 SSF_PAB: &2

WSS019 - Overview

• Message type: E = Error

• Message class: WSS - Web Services Security

• Message number: 019

• Message text: Signature check failed - WP: &1 SSF_PAB: &2

What causes this issue?

The X.509 signature was rejected by the system.

System Response

How to fix this error?

The signature is checked against the STRUST WS Security identity &V1&,
but failed due to:
CRC &V2&:
0 ok
1 failed to find external security library
2 format error
3 wrong input data
4 unsufficient memory for processing
5 signature certificate is not trusted. To trust the signature,
add the certificate (+ chain when issued by an certificate authority) to
the STRUST WS Security Identity &V1&
6 unsufficient memory for results
7 unknown address book
8 wrong password for address book
10 unsupported hash algorithm
11 ASN.1 coding failed
12 ASN.1 decoding failed
13 unknown error in crypto library. Check kernel traces for
details.

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

Additional information may be in the kernel traces of work process &V3&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WSS019 - Signature check failed - WP: &1 SSF_PAB: &2 ?

  Certainly! Here's a detailed explanation of the SAP error message:
  
  SAP Error Message:
  WSS019 Signature check failed - WP: &1 SSF_PAB: &2
  
  Meaning / 
  Cause:
  This error occurs during the verification of a digital signature in SAP's Secure Store and Forward (SSF) framework. Specifically, the system attempted to verify a signature on a Work Process (WP) using a PSE (Personal Security Environment) or a Public Key Infrastructure (PKI) object identified by SSF_PAB, but the signature check failed.
  Possible causes include:
  
  The digital signature is corrupted or altered.
  The public key or certificate used for verification is incorrect, expired, or missing.
  The PSE (Personal Security Environment) used for signature verification is not properly configured or does not contain the correct certificates.
  The data or document being verified has been changed after signing.
  Mismatch between the signature and the data (e.g., wrong hash algorithm).
  The cryptographic library or SSF configuration is incorrect or incomplete.
  
  
  Where it occurs:
  
  During signature verification in SAP applications that use