SignatureDescription could not be created for the signature algorithm supplied when using ECDSA algorithm

[pauloortins]

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I'm integrating SecureAuth as an IDP using SAML to my Azure B2C and SecureAuth by default uses ECDSA as the encryption algorithm.

<ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256"/>

When I integrate it the Azure B2C throws the following error:

"SignatureDescription could not be created for the signature algorithm supplied."

The only ways I'm able to make it work is:

1. Force SecureAuth to use RSA instead.

2. Disable the encryption by doing: <Metadata> <Item Key="ResponsesSigned">false</Item>
   <Item Key="WantsSignedAssertions">false</Item> </Metadata>

Is there an 3rd way when the Azure B2C can support the ECDSA algorithm?