1// Copyright (c) 2017 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
2//
3// This Source Code Form is subject to the terms of the Mozilla Public
4// License, v. 2.0. If a copy of the MPL was not distributed with this
5// file, You can obtain one at http://mozilla.org/MPL/2.0/.
6
7use try_from::TryFrom;
8
9use minidom::Element;
10
11use error::Error;
12
13use ns;
14
15#[derive(Debug, Clone)]
16pub struct ExplicitMessageEncryption {
17 pub namespace: String,
18 pub name: Option<String>,
19}
20
21impl TryFrom<Element> for ExplicitMessageEncryption {
22 type Err = Error;
23
24 fn try_from(elem: Element) -> Result<ExplicitMessageEncryption, Error> {
25 if !elem.is("encryption", ns::EME) {
26 return Err(Error::ParseError("This is not an encryption element."));
27 }
28 for _ in elem.children() {
29 return Err(Error::ParseError("Unknown child in encryption element."));
30 }
31 Ok(ExplicitMessageEncryption {
32 namespace: get_attr!(elem, "namespace", required),
33 name: get_attr!(elem, "name", optional),
34 })
35 }
36}
37
38impl From<ExplicitMessageEncryption> for Element {
39 fn from(eme: ExplicitMessageEncryption) -> Element {
40 Element::builder("encryption")
41 .ns(ns::EME)
42 .attr("namespace", eme.namespace)
43 .attr("name", eme.name)
44 .build()
45 }
46}
47
48#[cfg(test)]
49mod tests {
50 use super::*;
51
52 #[test]
53 fn test_simple() {
54 let elem: Element = "<encryption xmlns='urn:xmpp:eme:0' namespace='urn:xmpp:otr:0'/>".parse().unwrap();
55 let encryption = ExplicitMessageEncryption::try_from(elem).unwrap();
56 assert_eq!(encryption.namespace, "urn:xmpp:otr:0");
57 assert_eq!(encryption.name, None);
58
59 let elem: Element = "<encryption xmlns='urn:xmpp:eme:0' namespace='some.unknown.mechanism' name='SuperMechanism'/>".parse().unwrap();
60 let encryption = ExplicitMessageEncryption::try_from(elem).unwrap();
61 assert_eq!(encryption.namespace, "some.unknown.mechanism");
62 assert_eq!(encryption.name, Some(String::from("SuperMechanism")));
63 }
64
65 #[test]
66 fn test_unknown() {
67 let elem: Element = "<replace xmlns='urn:xmpp:message-correct:0'/>".parse().unwrap();
68 let error = ExplicitMessageEncryption::try_from(elem).unwrap_err();
69 let message = match error {
70 Error::ParseError(string) => string,
71 _ => panic!(),
72 };
73 assert_eq!(message, "This is not an encryption element.");
74 }
75
76 #[test]
77 fn test_invalid_child() {
78 let elem: Element = "<encryption xmlns='urn:xmpp:eme:0'><coucou/></encryption>".parse().unwrap();
79 let error = ExplicitMessageEncryption::try_from(elem).unwrap_err();
80 let message = match error {
81 Error::ParseError(string) => string,
82 _ => panic!(),
83 };
84 assert_eq!(message, "Unknown child in encryption element.");
85 }
86
87 #[test]
88 fn test_serialise() {
89 let elem: Element = "<encryption xmlns='urn:xmpp:eme:0' namespace='coucou'/>".parse().unwrap();
90 let eme = ExplicitMessageEncryption { namespace: String::from("coucou"), name: None };
91 let elem2 = eme.into();
92 assert_eq!(elem, elem2);
93 }
94}