OpenSAML user discussion

[Mitchell Prentice <>]

Hello

 

I have a signed SAML 2.0 assertion that includes http://www.w3.org/2001/10/xml-exc-c14n# canonicalization. Apparently the creator of this signed assertion signed the assertion and then formatted the assertion with whitespace characters after signing. I can verify the signature if the whitespace characters are not added but if the whitespace characters are added then the signature verification fails. The creator of the SAML assertion says that canonicalization is supposed to remove the whitespaces and that it's a bug if you cannot verify the signature even if the XML has been modified after signing by the inclusion of whitespaces. My understanding is that this is not the case and that you cannot add whitespace to the XML and still expect the signature to verify. Which is correct?

 

Thanks

Mitch