kristoferssolo/archived-des-rs
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test: pass all tests

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Kristofers Solo
2025-10-02 13:49:17 +03:00
parent bd5a5748d1
commit 509b6a92aa
3 changed files with 105 additions and 189 deletions
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160
des-lib/tests/des.rs
View File

@@ -1,5 +1,4 @@
use rand::random;
use std::time::Instant;
use rstest::rstest;
use des::Des;
@@ -12,7 +11,7 @@ fn des_instance() -> Des {
Des::new(TEST_KEY)
}
// #[test]
#[test]
fn test_ecb_mode_equivalence() {
// If you implement ECB mode, test it matches single block
let key = 0x1334_5779_9BBC_DFF1;
@@ -24,27 +23,50 @@ fn test_ecb_mode_equivalence() {
// assert_eq!(single_block, ecb_result[0]);
}
// #[test]
fn test_with_real_data() {
// Test with actual 8-byte data
let key_bytes = b"KGenius\x01";
let key = u64::from_le_bytes(*key_bytes);
let data_bytes = b"HelloDES!";
let mut padded = [0u8; 8];
padded[..data_bytes.len()].copy_from_slice(data_bytes);
let plaintext = u64::from_le_bytes(padded);
#[rstest]
#[case(TEST_PLAINTEXT, TEST_CIPHERTEXT, TEST_KEY)]
fn encrypt_decrypt_roundtrip(
#[case] plaintext: u64,
#[case] expected_ciphertext: u64,
#[case] key: u64,
) {
let des = Des::new(key);
let encrypted = des.encrypt(plaintext);
// Verify we can roundtrip
let decrypted = des.decrypt(encrypted);
let decrypted_bytes = decrypted.to_le_bytes();
assert_eq!(decrypted_bytes[..data_bytes.len()], *data_bytes);
let ciphertext = des.encrypt(plaintext);
let dectrypted = des.decrypt(ciphertext);
let re_ciphertext = des.encrypt(dectrypted);
assert_eq!(
ciphertext, expected_ciphertext,
"Encyption failed. Expected 0x{ciphertext:016X}, got 0x{expected_ciphertext:016X}"
);
assert_eq!(
dectrypted, plaintext,
"Decyption failed. Expected 0x{dectrypted:016X}, got 0x{plaintext:016X}"
);
assert_eq!(
re_ciphertext, expected_ciphertext,
"Re-encyption failed. Expected 0x{re_ciphertext:016X}, got 0x{expected_ciphertext:016X}"
);
}
// #[test]
#[test]
fn weak_keys_rejected() {
let weak_keys = [0x0101010101010101, 0xFEFEFEFEFEFEFEFE, 0xE001E001E001E001];
for key in weak_keys {
let des = Des::new(key);
let plaintext = TEST_PLAINTEXT;
let encrypted = des.encrypt(plaintext);
let dectrypted = des.decrypt(encrypted);
assert_eq!(
dectrypted, plaintext,
"Weak key {key:016X} failed roundtrip"
);
}
}
#[test]
fn all_zero_paintext() {
let des = des_instance();
@@ -54,70 +76,22 @@ fn all_zero_paintext() {
assert_eq!(decrypted, plain, "All-zero plaintext failed");
}
// #[test]
#[should_panic(expected = "Invalid key size")]
fn invalid_key_size() {
let _ = Des::new(0);
}
// #[test]
fn encrypt_decrypt_roundtrip() {
let des = des_instance();
let plaintext = TEST_PLAINTEXT;
let ciphertext = des.encrypt(plaintext);
let dectrypted = des.decrypt(plaintext);
let re_ciphertext = des.encrypt(dectrypted);
assert_eq!(ciphertext, TEST_CIPHERTEXT, "Encyption failed");
assert_eq!(re_ciphertext, TEST_CIPHERTEXT, "Re-Encyption failed");
}
// #[test]
fn weak_keys_rejected() {
let weak_keys = [0x0101010101010101, 0xFEFEFEFEFEFEFEFE, 0xE001E001E001E001];
for key in weak_keys {
let des = Des::new(key);
let plaintext = TEST_PLAINTEXT;
let encrypted = des.encrypt(plaintext);
let dectrypted = des.decrypt(encrypted);
assert_eq!(dectrypted, plaintext, "Weak key {key} failed roundtrip");
}
}
// #[test]
fn multiple_blocks() {
let des = des_instance();
let blocks = [
(0x0123456789ABCDEFu64, 0x85E813540F0AB405u64),
(0xFEDCBA9876543210u64, 0xC08BF0FF627D3E6Fu64), // Another test vector
(0x0000000000000000u64, 0x474D5E3B6F8A07F8u64), // Zero block
];
for (plaintext, expected) in blocks {
let encrypted = des.encrypt(plaintext);
assert_eq!(encrypted, expected, "Failed on plaintext: {plaintext:016X}");
let dectrypted = des.decrypt(encrypted);
assert_eq!(dectrypted, plaintext, "Roundtrip failed on block");
}
}
// #[test]
#[test]
fn all_one_paintext() {
let des = des_instance();
let plain = 1;
let plain = u64::MAX;
let encrypted = des.encrypt(plain);
let decrypted = des.decrypt(encrypted);
assert_eq!(decrypted, plain, "All-one plaintext failed");
}
// #[test]
#[test]
fn different_inputs() {
let des = des_instance();
let plain1 = 0x0000000000000001;
let plain2 = 0x0000000000000002;
let plain1 = 1;
let plain2 = 2;
let enc1 = des.encrypt(plain1);
let enc2 = des.encrypt(plain2);
assert_ne!(
@@ -125,43 +99,3 @@ fn different_inputs() {
"Encryption not deterministic for different inputs"
);
}
// #[test]
fn performance() {
let des = des_instance();
let plaintext = TEST_PLAINTEXT;
let start = Instant::now();
for _ in 0..10000 {
let _ = des.encrypt(plaintext);
}
let duration = start.elapsed();
println!("10k encryption took: {duration:?}");
// Reasonable benchmark: should be under 1ms on modern hardware
assert!(duration.as_millis() < 100, "Performance degraded");
}
// #[test]
fn fuzz_properties() {
let des = des_instance();
for _ in 0..100 {
let plaintext = random();
let encrypted = des.encrypt(plaintext);
let decrypted = des.decrypt(plaintext);
assert_eq!(decrypted, encrypted, "Fuzz roundtrip failed");
assert_ne!(encrypted, plaintext, "Encryption is identity function");
let key2 = random();
if key2 != TEST_KEY {
let des2 = Des::new(key2);
let encrypted2 = des2.encrypt(plaintext);
assert_ne!(
encrypted, encrypted2,
"Different keys produced same encryption"
);
}
}
}

57
des-lib/tests/key_schedule.rs
View File

@@ -24,25 +24,6 @@ const TEST_KEY: u64 = 0x1334_5779_9BBC_DFF1;
#[test]
fn key_schedule_generates_correct_subkeys() {
const EXPECTED_SUBKEYS: [u64; 16] = [
0x1B02_EFFC_7072,
0x79AE_D9DB_C9E5,
0x55FC_8A42_CF99,
0x72AD_D6DB_351D,
0x7CEC_07EB_53A8,
0x63A5_3E50_7B2F,
0xEC84_B7F6_18BC,
0xF78A_3AC1_3BFB,
0xE0DB_EBED_E781,
0xB1F3_47BA_464F,
0x215F_D3DE_D386,
0x7571_F594_67E9,
0x97C5_D1FA_BA41,
0x5F43_B7F2_E73A,
0xBF91_8D3D_3F0A,
0xCB3D_8B0E_17F5,
];
let des = Des::new(TEST_KEY);
assert_eq!(
@@ -51,41 +32,3 @@ fn key_schedule_generates_correct_subkeys() {
des.subkeys
);
}
// #[test]
fn test_rotation_shifts() {
// Test the left rotation logic in key schedule
let mut c: u32 = 0x0FFFFFFF; // 28 bits all 1s
c = c.rotate_left(1);
assert_eq!(c, 0x1FFFFFFF >> 4, "Single bit rotation failed");
// Test double shift
let mut d: u32 = 0xAAAAAAA; // 101010... pattern
d = d.rotate_left(2);
assert_eq!(d, 0x2AAAAAA, "Double rotation failed"); // Check pattern shift
}
// #[test]
fn test_weak_key_detection() {
let weak_keys = [
0x0101010101010101u64, // All odd parity
0xFEFEFEFEFEFEFEFEu64, // All even parity
0x1F1F1F1F0E0E0E0Eu64, // Semi-weak
];
for key in weak_keys {
let des = Des::new(key);
// Weak keys often produce subkeys that don't vary much
let subkeys = &des.subkeys;
let first = subkeys[0];
let last = subkeys[15];
// For true weak keys, many subkeys may be identical
// This is just a basic check - implement full weak key analysis if desired
println!(
"Weak key {} subkeys: first={:012X}, last={:012X}",
key,
first & 0xFFFFFFFFFFFF,
last & 0xFFFFFFFFFFFF
);
}
}