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use core::cell::Cell;
use kernel::ReturnCode;
use kernel::common::take_cell::TakeCell;
use kernel::hil::symmetric_encryption::{AES128CCM, AES128_KEY_SIZE, CCMClient, CCM_NONCE_LENGTH};
pub struct Test<'a, A: AES128CCM<'a> + 'a> {
aes_ccm: &'a A,
buf: TakeCell<'static, [u8]>,
current_test: Cell<usize>,
encrypting: Cell<bool>,
tests: [(
&'static [u8],
&'static [u8],
&'static [u8],
&'static [u8],
bool,
usize,
); 3],
}
impl<'a, A: AES128CCM<'a> + 'a> Test<'a, A> {
pub fn new(aes_ccm: &'a A, buf: &'static mut [u8]) -> Test<'a, A> {
Test {
aes_ccm: aes_ccm,
buf: TakeCell::new(buf),
current_test: Cell::new(0),
encrypting: Cell::new(true),
tests: [
(
&BEACON_UNSECURED[0..26],
&BEACON_UNSECURED[26..26],
&BEACON_SECURED[26..34],
&BEACON_NONCE,
false,
8,
),
(
&DATA_UNSECURED[0..26],
&DATA_UNSECURED[26..30],
&DATA_SECURED[26..30],
&DATA_NONCE,
true,
0,
),
(
&MAC_UNSECURED[0..29],
&MAC_UNSECURED[29..30],
&MAC_SECURED[29..38],
&MAC_NONCE,
true,
8,
),
],
}
}
pub fn run(&self) {
debug!("AES CCM* encryption/decryption tests");
self.trigger_test();
}
fn next_test(&self) -> bool {
if self.encrypting.get() {
self.encrypting.set(false);
} else {
self.encrypting.set(true);
self.current_test.set(self.current_test.get() + 1);
if self.current_test.get() >= self.tests.len() {
return false;
}
}
return true;
}
fn trigger_test(&self) {
let (a_data, m_data, c_data, nonce, confidential, mic_len) =
self.tests[self.current_test.get()];
let (a_off, m_off, m_len) = (0, a_data.len(), m_data.len());
let encrypting = self.encrypting.get();
let buf = match self.buf.take() {
None => panic!("Test failed: buffer is not present."),
Some(buf) => buf,
};
if encrypting {
buf[a_off..m_off].copy_from_slice(a_data);
buf[m_off..m_off + m_len].copy_from_slice(m_data);
} else {
buf[a_off..m_off].copy_from_slice(a_data);
buf[m_off..m_off + m_len + mic_len].copy_from_slice(c_data);
}
if self.aes_ccm.set_key(&KEY) != ReturnCode::SUCCESS
|| self.aes_ccm.set_nonce(&nonce) != ReturnCode::SUCCESS
{
panic!("Test failed: cannot set key or nonce.");
}
let (res, opt_buf) =
self.aes_ccm
.crypt(buf, a_off, m_off, m_len, mic_len, confidential, encrypting);
if res != ReturnCode::SUCCESS {
debug!("Failed to start test.")
}
if let Some(buf) = opt_buf {
self.buf.replace(buf);
}
}
fn check_test(&self, tag_is_valid: bool) {
let (a_data, m_data, c_data, _nonce, _confidential, mic_len) =
self.tests[self.current_test.get()];
let (a_off, m_off, m_len) = (0, a_data.len(), m_data.len());
let encrypting = self.encrypting.get();
let buf = match self.buf.take() {
None => panic!("Test failed: buffer is not present."),
Some(buf) => buf,
};
if encrypting {
let a_matches = buf[a_off..m_off]
.iter()
.zip(a_data.iter())
.all(|(a, b)| *a == *b);
let c_matches = buf[m_off..m_off + m_len + mic_len]
.iter()
.zip(c_data.iter())
.all(|(a, b)| *a == *b);
if a_matches && c_matches && tag_is_valid {
debug!(
"OK! (current_test={}, encrypting={}, tag_is_valid={})",
self.current_test.get(),
self.encrypting.get(),
tag_is_valid
);
} else {
debug!("Failed: a_matches={}, c_matches={}, (current_test={}, encrypting={}, tag_is_valid={}",
a_matches,
c_matches,
self.current_test.get(),
self.encrypting.get(),
tag_is_valid);
for (a, b) in buf[m_off..m_off + m_len + mic_len]
.iter()
.zip(c_data.iter())
{
debug!("{:x} vs {:x}", *a, *b);
}
}
} else {
let a_matches = buf[a_off..m_off]
.iter()
.zip(a_data.iter())
.all(|(a, b)| *a == *b);
let m_matches = buf[m_off..m_off + m_len]
.iter()
.zip(m_data.iter())
.all(|(a, b)| *a == *b);
if a_matches && m_matches && tag_is_valid {
debug!(
"OK! (current_test={}, encrypting={}, tag_is_valid={})",
self.current_test.get(),
self.encrypting.get(),
tag_is_valid
);
} else {
debug!("Failed: a_matches={}, m_matches={}, (current_test={}, encrypting={}, tag_is_valid={}",
a_matches,
m_matches,
self.current_test.get(),
self.encrypting.get(),
tag_is_valid);
}
}
self.buf.replace(buf);
}
}
impl<'a, A: AES128CCM<'a> + 'a> CCMClient for Test<'a, A> {
fn crypt_done(&self, buf: &'static mut [u8], res: ReturnCode, tag_is_valid: bool) {
self.buf.replace(buf);
if res != ReturnCode::SUCCESS {
debug!("Test failed: crypt_done returned {:?}", res);
} else {
self.check_test(tag_is_valid);
if self.next_test() {
self.trigger_test()
}
}
}
}
static KEY: [u8; AES128_KEY_SIZE] = [
0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF
];
static BEACON_SECURED: [u8; 34] = [
0x08, 0xD0, 0x84, 0x21, 0x43, 0x01, 0x00, 0x00, 0x00, 0x00, 0x48, 0xDE, 0xAC, 0x02, 0x05, 0x00,
0x00, 0x00, 0x55, 0xCF, 0x00, 0x00, 0x51, 0x52, 0x53, 0x54, 0x22, 0x3B, 0xC1, 0xEC, 0x84, 0x1A,
0xB5, 0x53,
];
static BEACON_UNSECURED: [u8; 26] = [
0x08, 0xD0, 0x84, 0x21, 0x43, 0x01, 0x00, 0x00, 0x00, 0x00, 0x48, 0xDE, 0xAC, 0x02, 0x05, 0x00,
0x00, 0x00, 0x55, 0xCF, 0x00, 0x00, 0x51, 0x52, 0x53, 0x54,
];
static BEACON_NONCE: [u8; CCM_NONCE_LENGTH] = [
0xAC, 0xDE, 0x48, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x05, 0x02
];
static DATA_SECURED: [u8; 30] = [
0x69, 0xDC, 0x84, 0x21, 0x43, 0x02, 0x00, 0x00, 0x00, 0x00, 0x48, 0xDE, 0xAC, 0x01, 0x00, 0x00,
0x00, 0x00, 0x48, 0xDE, 0xAC, 0x04, 0x05, 0x00, 0x00, 0x00, 0xD4, 0x3E, 0x02, 0x2B,
];
static DATA_UNSECURED: [u8; 30] = [
0x69, 0xDC, 0x84, 0x21, 0x43, 0x02, 0x00, 0x00, 0x00, 0x00, 0x48, 0xDE, 0xAC, 0x01, 0x00, 0x00,
0x00, 0x00, 0x48, 0xDE, 0xAC, 0x04, 0x05, 0x00, 0x00, 0x00, 0x61, 0x62, 0x63, 0x64,
];
static DATA_NONCE: [u8; CCM_NONCE_LENGTH] = [
0xAC, 0xDE, 0x48, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x05, 0x04
];
static MAC_SECURED: [u8; 38] = [
0x2B, 0xDC, 0x84, 0x21, 0x43, 0x02, 0x00, 0x00, 0x00, 0x00, 0x48, 0xDE, 0xAC, 0xFF, 0xFF, 0x01,
0x00, 0x00, 0x00, 0x00, 0x48, 0xDE, 0xAC, 0x06, 0x05, 0x00, 0x00, 0x00, 0x01, 0xD8, 0x4F, 0xDE,
0x52, 0x90, 0x61, 0xF9, 0xC6, 0xF1,
];
static MAC_UNSECURED: [u8; 30] = [
0x2B, 0xDC, 0x84, 0x21, 0x43, 0x02, 0x00, 0x00, 0x00, 0x00, 0x48, 0xDE, 0xAC, 0xFF, 0xFF, 0x01,
0x00, 0x00, 0x00, 0x00, 0x48, 0xDE, 0xAC, 0x06, 0x05, 0x00, 0x00, 0x00, 0x01, 0xCE,
];
static MAC_NONCE: [u8; CCM_NONCE_LENGTH] = [
0xAC, 0xDE, 0x48, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x05, 0x06
];