90 lines
2.8 KiB
Rust
90 lines
2.8 KiB
Rust
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// Copyright (c) 2024 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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use xso::{error::Error, AsXml, AsXmlText, FromXml, FromXmlText};
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use crate::ns;
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use std::borrow::Cow;
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/// One type of channel-binding, as defined by the IANA:
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/// https://www.iana.org/assignments/channel-binding-types/channel-binding-types.xhtml
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#[derive(Debug, Clone, PartialEq)]
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pub enum Type {
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/// The tls-unique channel binding.
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TlsUnique,
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/// The tls-server-end-point channel binding.
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TlsServerEndPoint,
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/// The tls-unique-for-telnet channel binding.
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TlsUniqueForTelnet,
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/// The EKM value obtained from the current TLS connection.
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///
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/// See RFC9266.
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TlsExporter,
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}
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impl FromXmlText for Type {
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fn from_xml_text(s: String) -> Result<Type, Error> {
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Ok(match s.as_ref() {
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"tls-unique" => Type::TlsUnique,
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"tls-server-end-point" => Type::TlsServerEndPoint,
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"tls-unique-for-telnet" => Type::TlsUniqueForTelnet,
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"tls-exporter" => Type::TlsExporter,
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_ => return Err(Error::Other("Unknown value '{s}' for 'type' attribute.")),
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})
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}
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}
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impl AsXmlText for Type {
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fn as_xml_text(&self) -> Result<Cow<'_, str>, Error> {
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Ok(Cow::Borrowed(match self {
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Type::TlsUnique => "tls-unique",
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Type::TlsServerEndPoint => "tls-server-end-point",
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Type::TlsUniqueForTelnet => "tls-unique-for-telnet",
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Type::TlsExporter => "tls-exporter",
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}))
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}
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}
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/// Stream feature listing the channel-binding types supported by the server.
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#[derive(FromXml, AsXml, Debug, Clone, PartialEq)]
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#[xml(namespace = ns::SASL_CB, name = "sasl-channel-binding")]
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pub struct SaslChannelBinding {
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/// The list of channel-binding types supported by the server.
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#[xml(extract(n = .., name = "channel-binding", fields(attribute(name = "type", type_ = Type))))]
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pub types: Vec<Type>,
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use minidom::Element;
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#[cfg(target_pointer_width = "64")]
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#[test]
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fn test_size() {
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assert_size!(Type, 1);
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assert_size!(SaslChannelBinding, 24);
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}
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#[cfg(target_pointer_width = "32")]
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#[test]
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fn test_size() {
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assert_size!(Type, 1);
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assert_size!(SaslChannelBinding, 12);
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}
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#[test]
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fn test_simple() {
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let elem: Element = "<sasl-channel-binding xmlns='urn:xmpp:sasl-cb:0'><channel-binding type='tls-server-end-point'/><channel-binding type='tls-exporter'/></sasl-channel-binding>".parse().unwrap();
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let sasl_cb = SaslChannelBinding::try_from(elem).unwrap();
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assert_eq!(sasl_cb.types, [Type::TlsServerEndPoint, Type::TlsExporter]);
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}
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}
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