I am trying to extract SAMLResponse assertion via https://<adfs_domain>/adfs/ls/idpinitiatedsignon using a webview. The problem is that the SAMLResponse assertion is not signed and the signature is not included inside the assertion.
As a result I cannot validate the SAML assertion. We have configured ADFS with an ADFS signing cert since it is an IDP initiated flow.
Also we set the following property in ADFS: SamlResponseSignature = AssertionOnly
See attached for SAMLResponse.xml