// AddTransform adds a Transform node to the appropriate location
func (s *Signature) AddTransform(transformID TransformID) error {
if s.refnode == nil {
return errors.New("missing reference node: did you call AddReference() first?")
}
if _, err := clib.XMLSecTmplReferenceAddTransform(s.refnode, clib.TransformID(transformID)); err != nil {
return err
}
return nil
}
// AddReference adds a Reference node to the appropriate location
func (s *Signature) AddReference(digestMethod TransformID, id, uri, nodeType string) error {
rn, err := clib.XMLSecTmplSignatureAddReference(
s.signnode,
clib.TransformID(digestMethod),
id,
uri,
nodeType,
)
if err != nil {
return err
}
s.refnode = rn
return nil
}
// NewSignature creates a Signature object.
func NewSignature(n types.Node, c14n, sig TransformID, id string) (*Signature, error) {
doc, err := n.OwnerDocument()
if err != nil {
return nil, err
}
signnode, err := clib.XMLSecTmplSignatureCreateNsPref(
doc,
clib.TransformID(c14n),
clib.TransformID(sig),
id,
clib.Prefix,
)
if err != nil {
return nil, err
}
n.AddChild(signnode)
return &Signature{
signmethod: sig,
signnode: signnode,
}, nil
}