hmac_sha1/
lib.rs

1use sha1::Sha1;
2use hmac::{Hmac, Mac};
3
4// define hash constants
5pub const SHA1_DIGEST_BYTES: usize = 20;
6
7pub fn hmac_sha1(key: &[u8], message: &[u8]) -> [u8; SHA1_DIGEST_BYTES] {
8    // Create the hasher with the key. We can use expect for Hmac algorithms as they allow arbitrary key sizes.
9    let mut hasher: Hmac<Sha1> = Mac::new_from_slice(key)
10         .expect("HMAC algoritms can take keys of any size");
11
12    // hash the message
13    hasher.update(message);
14
15    // finalize the hash and convert to a static array
16    hasher.finalize().into_bytes().into()
17}
18
19
20
21#[cfg(test)]
22mod tests {
23    use crate::*;
24
25    use hex::ToHex;
26
27
28    #[test]
29    fn test_vector1() {
30        // tuples of (data, key, expected hex string)
31        let data = "Hi There".as_bytes();
32        let key = &[0x0b; 20];
33        let expected = "b617318655057264e28bc0b6fb378c8ef146be00".to_string();
34
35        let hash = hmac_sha1(key, data);
36        assert_eq!(hash.encode_hex::<String>(),expected);
37    }
38
39    #[test]
40    fn test_vector2() {
41        // tuples of (data, key, expected hex string)
42        let data = "what do ya want for nothing?".as_bytes();
43        let key = "Jefe".as_bytes();
44        let expected = "effcdf6ae5eb2fa2d27416d5f184df9c259a7c79".to_string();
45
46        let hash = hmac_sha1(key, data);
47        assert_eq!(hash.encode_hex::<String>(),expected);
48    }
49
50    #[test]
51    fn test_vector3() {
52        // tuples of (data, key, expected hex string)
53        let data = &[0xdd; 50];
54        let key = &[0xaa; 20];
55        let expected = "125d7342b9ac11cd91a39af48aa17b4f63f175d3".to_string();
56
57        let hash = hmac_sha1(key, data);
58        assert_eq!(hash.encode_hex::<String>(),expected);
59    }
60
61    #[test]
62    fn test_vector4() {
63        // tuples of (data, key, expected hex string)
64        let data = &[0xcd; 50];
65        let key = &[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25];
66        let expected = "4c9007f4026250c6bc8414f9bf50c86c2d7235da".to_string();
67
68        let hash = hmac_sha1(key, data);
69        assert_eq!(hash.encode_hex::<String>(),expected);
70    }
71
72    #[test]
73    fn test_vector5() {
74        // tuples of (data, key, expected hex string)
75        let data = "Test With Truncation".as_bytes();
76        let key = &[0x0c;20];
77        let expected = "4c1a03424b55e07fe7f27be1d58bb9324a9a5a04".to_string();
78
79        let hash = hmac_sha1(key, data);
80        assert_eq!(hash.encode_hex::<String>(),expected);
81    }
82
83    #[test]
84    fn test_vector6() {
85        // tuples of (data, key, expected hex string)
86        let data = "Test Using Larger Than Block-Size Key - Hash Key First".as_bytes();
87        let key = &[0xaa;80];
88        let expected = "aa4ae5e15272d00e95705637ce8a3b55ed402112".to_string();
89
90        let hash = hmac_sha1(key, data);
91        assert_eq!(hash.encode_hex::<String>(),expected);
92    }
93
94    #[test]
95    fn test_vector7() {
96        // tuples of (data, key, expected hex string)
97        let data = "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data".as_bytes();
98        let key = &[0xaa;80];
99        let expected = "e8e99d0f45237d786d6bbaa7965c7808bbff1a91".to_string();
100
101        let hash = hmac_sha1(key, data);
102        assert_eq!(hash.encode_hex::<String>(),expected);
103    }
104}
hmac_sha1/lib.rs

hmac_sha1/
lib.rs
