How To Fix SAML2045 - Message &1 is not signed

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 045

• Message text: Message &1 is not signed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2045 - Message &1 is not signed ?

  The SAP error message SAML2045, which states "Message &1 is not signed," typically occurs in the context of Single Sign-On (SSO) configurations using SAML (Security Assertion Markup Language). This error indicates that the SAML assertion or message being processed is not signed, which is a requirement for the security and integrity of the SSO process.
  Cause:
  
  Unsigned SAML Assertion: The SAML assertion being sent from the Identity Provider (IdP) to the Service Provider (SP) is not signed. This can happen if the IdP is not configured to sign the assertions or if there is a misconfiguration in the IdP settings.
  Configuration Issues: There may be issues in the configuration of the SAML settings in either the IdP or the SP, leading to the assertion not being signed.
  Certificate Issues: The signing certificate used by the IdP may not be correctly configured or may not match the expected certificate on the SP side.
  
  Solution:
  
  Check IdP Configuration: Ensure that the Identity Provider is configured to sign the SAML assertions. This typically involves checking the settings in the IdP management console.
  Verify Signing Certificate: Make sure that the signing certificate used by the IdP is correctly configured and that the SP trusts this certificate. You may need to import the IdP's signing certificate into the SP's trust store.
  Review SAML Assertion Settings: In the IdP, check the settings related to SAML assertions to ensure that signing is enabled. This may include settings for signing algorithms and certificate usage.
  Test with Different IdP: If possible, test the SSO configuration with a different IdP to determine if the issue is specific to the current IdP configuration.
  Check Logs: Review the logs on both the IdP and SP sides for any additional error messages or warnings that could provide more context about the issue.
  
  Related Information:
  
  SAML Assertions: Understand the structure of SAML assertions, including the importance of signing for security.
  SAP SSO Documentation: Refer to SAP's official documentation on configuring SSO with SAML for detailed steps and best practices.
  IdP Documentation: Consult the documentation for your specific Identity Provider (e.g., ADFS, Okta, etc.) for guidance on enabling signing for SAML assertions.
  Security Best Practices: Familiarize yourself with security best practices for SSO and SAML, including the importance of using signed assertions to prevent tampering.
  
  By following these steps and checking the relevant configurations, you should be able to resolve the SAML2045 error and ensure that your SSO setup is functioning correctly.