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|
//! This compares results against the python compatibility tests:
//! spake2.test.test_compat.SPAKE2.test_asymmetric . The python test passes a
//! deterministic RNG (used only for tests, of course) into the per-Group
//! "random_scalar()" function, which results in some particular scalar.
use super::*;
use curve25519_dalek::constants::ED25519_BASEPOINT_POINT;
use num_bigint::BigUint;
// the python tests show the long-integer form of scalars. the rust code
// wants an array of bytes (little-endian). Make sure the way we convert
// things works correctly.
fn decimal_to_scalar(d: &[u8]) -> c2_Scalar {
let bytes = BigUint::parse_bytes(d, 10).unwrap().to_bytes_le();
assert_eq!(bytes.len(), 32);
let mut b2 = [0u8; 32];
b2.copy_from_slice(&bytes);
c2_Scalar::from_bytes_mod_order(b2)
}
#[test]
fn test_convert() {
let t1_decimal =
b"2238329342913194256032495932344128051776374960164957527413114840482143558222";
let t1_scalar = decimal_to_scalar(t1_decimal);
let t1_bytes = t1_scalar.to_bytes();
let expected = [
0x4e, 0x5a, 0xb4, 0x34, 0x5d, 0x47, 0x08, 0x84, 0x59, 0x13, 0xb4, 0x64, 0x1b, 0xc2, 0x7d,
0x52, 0x52, 0xa5, 0x85, 0x10, 0x1b, 0xcc, 0x42, 0x44, 0xd4, 0x49, 0xf4, 0xa8, 0x79, 0xd9,
0xf2, 0x04,
];
assert_eq!(t1_bytes, expected);
//println!("t1_scalar is {:?}", t1_scalar);
}
#[test]
fn test_serialize_basepoint() {
// make sure elements are serialized same as the python library
let exp = "5866666666666666666666666666666666666666666666666666666666666666";
let base_vec = ED25519_BASEPOINT_POINT.compress().as_bytes().to_vec();
let base_hex = hex::encode(base_vec);
println!("exp: {:?}", exp);
println!("got: {:?}", base_hex);
assert_eq!(exp, base_hex);
}
#[test]
fn test_password_to_scalar() {
let password = Password::new(b"password");
let expected_pw_scalar = decimal_to_scalar(
b"3515301705789368674385125653994241092664323519848410154015274772661223168839",
);
let pw_scalar = Ed25519Group::hash_to_scalar(&password);
println!("exp: {:?}", hex::encode(expected_pw_scalar.as_bytes()));
println!("got: {:?}", hex::encode(pw_scalar.as_bytes()));
assert_eq!(&pw_scalar, &expected_pw_scalar);
}
#[test]
fn test_sizes() {
let (s1, msg1) = SPAKE2::<Ed25519Group>::start_a(
&Password::new(b"password"),
&Identity::new(b"idA"),
&Identity::new(b"idB"),
);
assert_eq!(msg1.len(), 1 + 32);
let (s2, msg2) = SPAKE2::<Ed25519Group>::start_b(
&Password::new(b"password"),
&Identity::new(b"idA"),
&Identity::new(b"idB"),
);
assert_eq!(msg2.len(), 1 + 32);
let key1 = s1.finish(&msg2).unwrap();
let key2 = s2.finish(&msg1).unwrap();
assert_eq!(key1.len(), 32);
assert_eq!(key2.len(), 32);
let (s1, msg1) = SPAKE2::<Ed25519Group>::start_symmetric(
&Password::new(b"password"),
&Identity::new(b"idS"),
);
assert_eq!(msg1.len(), 1 + 32);
let (s2, msg2) = SPAKE2::<Ed25519Group>::start_symmetric(
&Password::new(b"password"),
&Identity::new(b"idS"),
);
assert_eq!(msg2.len(), 1 + 32);
let key1 = s1.finish(&msg2).unwrap();
let key2 = s2.finish(&msg1).unwrap();
assert_eq!(key1.len(), 32);
assert_eq!(key2.len(), 32);
}
#[test]
fn test_hash_ab() {
let key = ed25519_hash_ab(
b"pw",
b"idA",
b"idB",
b"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", // len=32
b"YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY",
b"KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK",
);
let expected_key = "d59d9ba920f7092565cec747b08d5b2e981d553ac32fde0f25e5b4a4cfca3efd";
assert_eq!(hex::encode(key), expected_key);
}
#[test]
fn test_hash_symmetric() {
let key = ed25519_hash_symmetric(
b"pw",
b"idSymmetric",
b"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
b"YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY",
b"KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK",
);
let expected_key = "b0b31e4401aae37d91a9a8bf6fbb1298cafc005ff9142e3ffc5b9799fb11128b";
assert_eq!(hex::encode(key), expected_key);
}
#[test]
fn test_asymmetric() {
let scalar_a = decimal_to_scalar(
b"2611694063369306139794446498317402240796898290761098242657700742213257926693",
);
let scalar_b = decimal_to_scalar(
b"7002393159576182977806091886122272758628412261510164356026361256515836884383",
);
let expected_pw_scalar = decimal_to_scalar(
b"3515301705789368674385125653994241092664323519848410154015274772661223168839",
);
println!("scalar_a is {}", hex::encode(scalar_a.as_bytes()));
let (s1, msg1) = SPAKE2::<Ed25519Group>::start_a_internal(
&Password::new(b"password"),
&Identity::new(b"idA"),
&Identity::new(b"idB"),
scalar_a,
);
let expected_msg1 = "416fc960df73c9cf8ed7198b0c9534e2e96a5984bfc5edc023fd24dacf371f2af9";
println!();
println!("xys1: {:?}", hex::encode(s1.xy_scalar.as_bytes()));
println!();
println!("pws1: {:?}", hex::encode(s1.password_scalar.as_bytes()));
println!("exp : {:?}", hex::encode(expected_pw_scalar.as_bytes()));
println!();
println!("msg1: {:?}", hex::encode(&msg1));
println!("exp : {:?}", expected_msg1);
println!();
assert_eq!(
hex::encode(expected_pw_scalar.as_bytes()),
hex::encode(s1.password_scalar.as_bytes())
);
assert_eq!(hex::encode(&msg1), expected_msg1);
let (s2, msg2) = SPAKE2::<Ed25519Group>::start_b_internal(
&Password::new(b"password"),
&Identity::new(b"idA"),
&Identity::new(b"idB"),
scalar_b,
);
assert_eq!(expected_pw_scalar, s2.password_scalar);
assert_eq!(
hex::encode(&msg2),
"42354e97b88406922b1df4bea1d7870f17aed3dba7c720b313edae315b00959309"
);
let key1 = s1.finish(&msg2).unwrap();
let key2 = s2.finish(&msg1).unwrap();
assert_eq!(key1, key2);
assert_eq!(
hex::encode(key1),
"712295de7219c675ddd31942184aa26e0a957cf216bc230d165b215047b520c1"
);
}
#[test]
fn test_debug() {
let (s1, _msg1) = SPAKE2::<Ed25519Group>::start_a(
&Password::new(b"password"),
&Identity::new(b"idA"),
&Identity::new(b"idB"),
);
println!("s1: {:?}", s1);
assert_eq!(
format!("{:?}", s1),
"SPAKE2 { group: \"Ed25519\", side: A, idA: \"(s=idA)\", idB: \"(s=idB)\", idS: \"(s=)\" }"
);
let (s2, _msg1) = SPAKE2::<Ed25519Group>::start_symmetric(
&Password::new(b"password"),
&Identity::new(b"idS"),
);
println!("s2: {:?}", s2);
assert_eq!(format!("{:?}", s2),
"SPAKE2 { group: \"Ed25519\", side: Symmetric, idA: \"(s=)\", idB: \"(s=)\", idS: \"(s=idS)\" }");
}
|
