// requestAuth adds the token to the logical.Request if it exists.
func requestAuth(core *vault.Core, r *http.Request, req *logical.Request) *logical.Request {
// Attach the header value if we have it
if v := r.Header.Get(AuthHeaderName); v != "" {
req.ClientToken = v
// Also attach the accessor if we have it. This doesn't fail if it
// doesn't exist because the request may be to an unauthenticated
// endpoint/login endpoint where a bad current token doesn't matter, or
// a token from a Vault version pre-accessors.
te, err := core.LookupToken(v)
if err == nil && te != nil {
req.ClientTokenAccessor = te.Accessor
}
}
return req
}