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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
#![no_std]
#![no_main]
use defmt::info;
use embassy_executor::Spawner;
use embassy_stm32::hash::*;
use embassy_stm32::{Config, bind_interrupts, hash, peripherals};
use embassy_time::Instant;
use hmac::{Hmac, Mac};
use sha2::{Digest, Sha256};
use {defmt_rtt as _, panic_probe as _};
type HmacSha256 = Hmac<Sha256>;
bind_interrupts!(struct Irqs {
HASH => hash::InterruptHandler<peripherals::HASH>;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) -> ! {
let config = Config::default();
let p = embassy_stm32::init(config);
let test_1: &[u8] = b"as;dfhaslfhas;oifvnasd;nifvnhasd;nifvhndlkfghsd;nvfnahssdfgsdafgsasdfasdfasdfasdfasdfghjklmnbvcalskdjghalskdjgfbaslkdjfgbalskdjgbalskdjbdfhsdfhsfghsfghfgh";
let test_2: &[u8] = b"fdhalksdjfhlasdjkfhalskdjfhgal;skdjfgalskdhfjgalskdjfglafgadfgdfgdafgaadsfgfgdfgadrgsyfthxfgjfhklhjkfgukhulkvhlvhukgfhfsrghzdhxyfufynufyuszeradrtydyytserr";
let mut hw_hasher = Hash::new_blocking(p.HASH, Irqs);
let hw_start_time = Instant::now();
// Compute a digest in hardware.
let mut context = hw_hasher.start(Algorithm::SHA256, DataType::Width8, None);
hw_hasher.update_blocking(&mut context, test_1);
hw_hasher.update_blocking(&mut context, test_2);
let mut hw_digest: [u8; 32] = [0; 32];
hw_hasher.finish_blocking(context, &mut hw_digest);
let hw_end_time = Instant::now();
let hw_execution_time = hw_end_time - hw_start_time;
let sw_start_time = Instant::now();
// Compute a digest in software.
let mut sw_hasher = Sha256::new();
sw_hasher.update(test_1);
sw_hasher.update(test_2);
let sw_digest = sw_hasher.finalize();
let sw_end_time = Instant::now();
let sw_execution_time = sw_end_time - sw_start_time;
info!("Hardware Digest: {:?}", hw_digest);
info!("Software Digest: {:?}", sw_digest[..]);
info!("Hardware Execution Time: {:?}", hw_execution_time);
info!("Software Execution Time: {:?}", sw_execution_time);
assert_eq!(hw_digest, sw_digest[..]);
let hmac_key: [u8; 64] = [0x55; 64];
// Compute HMAC in hardware.
let mut sha256hmac_context = hw_hasher.start(Algorithm::SHA256, DataType::Width8, Some(&hmac_key));
hw_hasher.update_blocking(&mut sha256hmac_context, test_1);
hw_hasher.update_blocking(&mut sha256hmac_context, test_2);
let mut hw_hmac: [u8; 32] = [0; 32];
hw_hasher.finish_blocking(sha256hmac_context, &mut hw_hmac);
// Compute HMAC in software.
let mut sw_mac = HmacSha256::new_from_slice(&hmac_key).unwrap();
sw_mac.update(test_1);
sw_mac.update(test_2);
let sw_hmac = sw_mac.finalize().into_bytes();
info!("Hardware HMAC: {:?}", hw_hmac);
info!("Software HMAC: {:?}", sw_hmac[..]);
assert_eq!(hw_hmac, sw_hmac[..]);
loop {}
}
|
