4.3 library(xmldsig): XML Digital signature
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Availability::- use_module(library(xmldsig)).(can be autoloaded)
Source[det]xmld_verify_signature(+DOM, +SignatureDOM, -Certificate, +Options)
Confirm that an ds:Signature element contains a valid signature. Certificate is bound to the certificate that appears in the element if the signature is valid. It is up to the caller to determine if the certificate is trusted or not.

Note: The DOM and SignatureDOM must have been obtained using the load_structure/3 option keep_prefix(true) otherwise it is impossible to generate an identical document for checking the signature. See also xml_write_canonical/3.