90 lines
3.2 KiB
Rust
90 lines
3.2 KiB
Rust
// Copyright (c) 2017 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 minidom::Element;
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use error::Error;
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use ns;
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#[derive(Debug, Clone)]
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pub struct ExplicitMessageEncryption {
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pub namespace: String,
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pub name: Option<String>,
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}
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pub fn parse_explicit_message_encryption(root: &Element) -> Result<ExplicitMessageEncryption, Error> {
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if !root.is("encryption", ns::EME) {
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return Err(Error::ParseError("This is not an encryption element."));
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}
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for _ in root.children() {
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return Err(Error::ParseError("Unknown child in encryption element."));
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}
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let namespace = root.attr("namespace").ok_or(Error::ParseError("Mandatory argument 'namespace' not present in encryption element."))?.to_owned();
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let name = root.attr("name").and_then(|value| value.parse().ok());
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Ok(ExplicitMessageEncryption {
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namespace: namespace,
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name: name,
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})
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}
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pub fn serialise(eme: &ExplicitMessageEncryption) -> Element {
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Element::builder("encryption")
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.ns(ns::EME)
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.attr("namespace", eme.namespace.clone())
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.attr("name", eme.name.clone())
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.build()
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}
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#[cfg(test)]
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mod tests {
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use minidom::Element;
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use error::Error;
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use eme;
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#[test]
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fn test_simple() {
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let elem: Element = "<encryption xmlns='urn:xmpp:eme:0' namespace='urn:xmpp:otr:0'/>".parse().unwrap();
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let encryption = eme::parse_explicit_message_encryption(&elem).unwrap();
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assert_eq!(encryption.namespace, "urn:xmpp:otr:0");
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assert_eq!(encryption.name, None);
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let elem: Element = "<encryption xmlns='urn:xmpp:eme:0' namespace='some.unknown.mechanism' name='SuperMechanism'/>".parse().unwrap();
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let encryption = eme::parse_explicit_message_encryption(&elem).unwrap();
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assert_eq!(encryption.namespace, "some.unknown.mechanism");
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assert_eq!(encryption.name, Some(String::from("SuperMechanism")));
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}
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#[test]
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fn test_unknown() {
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let elem: Element = "<replace xmlns='urn:xmpp:message-correct:0'/>".parse().unwrap();
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let error = eme::parse_explicit_message_encryption(&elem).unwrap_err();
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let message = match error {
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Error::ParseError(string) => string,
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_ => panic!(),
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};
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assert_eq!(message, "This is not an encryption element.");
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}
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#[test]
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fn test_invalid_child() {
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let elem: Element = "<encryption xmlns='urn:xmpp:eme:0'><coucou/></encryption>".parse().unwrap();
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let error = eme::parse_explicit_message_encryption(&elem).unwrap_err();
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let message = match error {
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Error::ParseError(string) => string,
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_ => panic!(),
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};
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assert_eq!(message, "Unknown child in encryption element.");
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}
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#[test]
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fn test_serialise() {
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let elem: Element = "<encryption xmlns='urn:xmpp:eme:0' namespace='coucou'/>".parse().unwrap();
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let eme = eme::ExplicitMessageEncryption { namespace: String::from("coucou"), name: None };
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let elem2 = eme::serialise(&eme);
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assert_eq!(elem, elem2);
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}
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}
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