wlan_rsn/integrity/
hmac_md5.rs

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1// Copyright 2019 The Fuchsia Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use crate::integrity::Algorithm;
6use crate::Error;
7use hmac::Mac as _;
8
9pub struct HmacMd5;
10
11impl HmacMd5 {
12    pub fn new() -> Self {
13        Self
14    }
15}
16
17impl Algorithm for HmacMd5 {
18    fn compute(&self, key: &[u8], data: &[u8]) -> Result<Vec<u8>, Error> {
19        let mut hmac = hmac::Hmac::<md5::Md5>::new_from_slice(key).expect("construct new HmacMd5");
20        hmac.update(data);
21        let bytes: [u8; 16] = hmac.finalize().into_bytes().into();
22        Ok(bytes.into())
23    }
24}
25
26#[cfg(test)]
27mod tests {
28    use super::*;
29    use hex::FromHex;
30
31    fn run_test_case(key: &[u8], data: &[u8], expected_hex: &str) {
32        let hmac_md5 = HmacMd5 {};
33        let result = hmac_md5.compute(key, data);
34        assert!(result.is_ok());
35
36        let expected = Vec::from_hex(expected_hex).unwrap();
37        assert_eq!(expected, result.unwrap());
38
39        assert!(hmac_md5.verify(key, data, &expected[..]));
40    }
41
42    // RFC 2202, Test Case 1
43    #[test]
44    fn test_test_case_1() {
45        let key = Vec::from_hex("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b").unwrap();
46        let data = "Hi There".as_bytes();
47        let expected = "9294727a3638bb1c13f48ef8158bfc9d";
48        run_test_case(&key[..], data, expected);
49    }
50
51    // RFC 2202, Test Case 2
52    #[test]
53    fn test_test_case_2() {
54        let key = "Jefe".as_bytes();
55        let data = "what do ya want for nothing?".as_bytes();
56        let expected = "750c783e6ab0b503eaa86e310a5db738";
57        run_test_case(key, data, expected);
58    }
59
60    // RFC 2202, Test Case 3
61    #[test]
62    fn test_test_case_3() {
63        let key = Vec::from_hex("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa").unwrap();
64        let data = Vec::from_hex("dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd").unwrap();
65        let expected = "56be34521d144c88dbb8c733f0e8b3f6";
66        run_test_case(&key[..], &data[..], expected);
67    }
68
69    // RFC 2202, Test Case 4
70    #[test]
71    fn test_test_case_4() {
72        let key = Vec::from_hex("0102030405060708090a0b0c0d0e0f10111213141516171819").unwrap();
73        let data = Vec::from_hex("cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd").unwrap();
74        let expected = "697eaf0aca3a3aea3a75164746ffaa79";
75        run_test_case(&key[..], &data[..], expected);
76    }
77
78    // RFC 2202, Test Case 5
79    #[test]
80    fn test_test_case_5() {
81        let key = Vec::from_hex("0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c").unwrap();
82        let data = "Test With Truncation".as_bytes();
83        let expected = "56461ef2342edc00f9bab995690efd4c";
84        run_test_case(&key[..], data, expected);
85    }
86
87    // RFC 2202, Test Case 6
88    #[test]
89    fn test_test_case_6() {
90        let key = Vec::from_hex("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa").unwrap();
91        let data = "Test Using Larger Than Block-Size Key - Hash Key First".as_bytes();
92        let expected = "6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd";
93        run_test_case(&key[..], data, expected);
94    }
95
96    // RFC 2202, Test Case 7
97    #[test]
98    fn test_test_case_7() {
99        let key = Vec::from_hex("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa").unwrap();
100        let data =
101            "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data".as_bytes();
102        let expected = "6f630fad67cda0ee1fb1f562db3aa53e";
103        run_test_case(&key[..], data, expected);
104    }
105
106    #[test]
107    fn test_verify_failure() {
108        let key = Vec::from_hex("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b").unwrap();
109        let data = "Hi There".as_bytes();
110        let expected = Vec::from_hex("9294727a3638bb1c13f48ef8158bfc9d").unwrap();
111        let hmac_md5 = HmacMd5 {};
112        let result = hmac_md5.verify(&key[..], data, &expected[..]);
113        assert!(result);
114        let not_expected = Vec::from_hex("deadbeef3638bb1c13f48ef8158bfc9d").unwrap();
115        let result = hmac_md5.verify(&key[..], data, &not_expected[..]);
116        assert!(!result);
117    }
118}
wlan_rsn/integrity/hmac_md5.rs

wlan_rsn/integrity/
hmac_md5.rs
