bn254 0.0.1

Open source implementation of Barreto-Naehrig (BN) aggregate signatures written in Rust
Documentation 
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use bn::{Group, G2};

/// Test vectors taken from https://asecuritysite.com/encryption/go_bn256.
/// The public keys in G2 are changed in order in the website, i.e., imaginary
/// goes first.
///
/// In order to construct the test vectors we need to do the following:
/// - Get the modulus of Fq
/// - Get the components (real, imaginary) of x and y
/// - Perform (imaginary*modulus) + real
/// - Compress with 0x0a or 0x0b depending on the value of y
use super::*;

#[test]
fn test_valid_private_key() {
    let compressed = hex::decode("023aed31b5a9e486366ea9988b05dba469c6206e58361d9c065bbea7d928204a").unwrap();
    let private_key = PrivateKey::try_from(compressed.as_slice());
    assert_eq!(private_key.unwrap().to_bytes().unwrap(), compressed);
}

#[test]
#[should_panic(expected = "InvalidLength")]
fn test_invalid_private_key_1() {
    let compressed = hex::decode(
        "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    )
    .unwrap();
    let private_key = PrivateKey::try_from(compressed.as_slice());
    private_key.unwrap();
}

#[test]
#[should_panic(expected = "InvalidLength")]
fn test_invalid_private_key_2() {
    let compressed = hex::decode("aaaa").unwrap();
    let private_key = PrivateKey::try_from(compressed.as_slice());
    private_key.unwrap();
}

#[test]
fn test_compressed_public_key_1() {
    let compressed = hex::decode("0a023aed31b5a9e486366ea9988b05dba469c6206e58361d9c065bbea7d928204a761efc6e4fa08ed227650134b52c7f7dd0463963e8a4bf21f4899fe5da7f984a").unwrap();
    let public_key = PublicKey::from_compressed(&compressed).unwrap();
    let compressed_again = public_key.to_compressed().unwrap();
    assert_eq!(compressed, compressed_again);
}

#[test]
fn test_uncompressed_public_key() {
    let uncompressed = hex::decode(
        "28fe26becbdc0384aa67bf734d08ec78ecc2330f0aa02ad9da00f56c37907f78\
             2cd080d897822a95a0fb103c54f06e9bf445f82f10fe37efce69ecb59514abc8\
             237faeb0351a693a45d5d54aa9759f52a71d76edae2132616d6085a9b2228bf9\
             0f46bd1ef47552c3089604c65a3e7154e3976410be01149b60d5a41a6053e6c2",
    )
    .unwrap();
    let public_key = PublicKey::from_uncompressed(&uncompressed).unwrap();

    let uncompressed_again = public_key.to_uncompressed().unwrap();
    assert_eq!(uncompressed_again, uncompressed);
}

#[test]
fn test_to_public_key_1() {
    let private_key = hex::decode("1ab1126ff2e37c6e6eddea943ccb3a48f83b380b856424ee552e113595525565").unwrap();
    let expected = hex::decode(
        "28fe26becbdc0384aa67bf734d08ec78ecc2330f0aa02ad9da00f56c37907f78\
             2cd080d897822a95a0fb103c54f06e9bf445f82f10fe37efce69ecb59514abc8\
             237faeb0351a693a45d5d54aa9759f52a71d76edae2132616d6085a9b2228bf9\
             0f46bd1ef47552c3089604c65a3e7154e3976410be01149b60d5a41a6053e6c2",
    )
    .unwrap();
    let expected_public_key = PublicKey::from_uncompressed(expected).unwrap();
    let private_key = PrivateKey::try_from(private_key.as_ref()).unwrap();
    let public_key = PublicKey::from_private_key(&private_key);
    assert_eq!(public_key.0, expected_public_key.0);
}

#[test]
fn test_to_public_key_2() {
    let private_key = hex::decode("2009da7287c158b126123c113d1c85241b6e3294dd75c643588630a8bc0f934c").unwrap();
    let expected = hex::decode(
        "1cd5df38ed2f184b9830bfd3c2175d53c1455352307ead8cbd7c6201202f4aa8\
             02ce1c4241143cc61d82589c9439c6dd60f81fa6f029625d58bc0f2e25e4ce89\
             0ba19ae3b5a298b398b3b9d410c7e48c4c8c63a1d6b95b098289fbe1503d00fb\
             2ec596e93402de0abc73ce741f37ed4984a0b59c96e20df8c9ea1c4e6ec04556",
    )
    .unwrap();
    let expected_public_key = PublicKey::from_uncompressed(expected).unwrap();
    let private_key = PrivateKey::try_from(private_key.as_ref()).unwrap();
    let public_key = PublicKey::from_private_key(&private_key);
    assert_eq!(public_key.0, expected_public_key.0);
}

#[test]
fn test_to_public_key_3() {
    let private_key = hex::decode("26fb4d661491b0a623637a2c611e34b6641cdea1743bee94c17b67e5ef14a550").unwrap();
    let expected = hex::decode(
        "077dfcf14e940b69bf88fa1ad99b6c7e1a1d6d2cb8813ac53383bf505a17f8ff\
             2d1a9b04a2c5674373353b5a25591292e69c37c0b84d9ef1c780a57bb98638e6\
             2dc52f109b333c4125bccf55bc3a839ce57676514405656c79e577e231519273\
             2410eee842807d9325f22d087fa6bc79d9bbea07f5fa8c345e1e57b28ad54f84",
    )
    .unwrap();
    let expected_public_key = PublicKey::from_uncompressed(expected).unwrap();
    let private_key = PrivateKey::try_from(private_key.as_ref()).unwrap();
    let public_key = PublicKey::from_private_key(&private_key);
    assert_eq!(public_key.0, expected_public_key.0);
}

#[test]
fn test_to_public_key_4() {
    let private_key = hex::decode("0f6b8785374476a3b3e4bde2c64dfb12964c81c7930d32367c8e318609387872").unwrap();
    let expected = hex::decode(
        "270567a05b56b02e813281d554f46ce0c1b742b622652ef5a41d69afb6eb8338\
             1bab5671c5107de67fe06007dde240a84674c8ff13eeac6d64bad0caf2cfe53e\
             0142f4e04fc1402e17ae7e624fd9bd15f1eae0a1d8eda4e26ab70fd4cd793338\
             02b54a5deaaf86dc7f03d080c8373d62f03b3be06dac42b2d9426a8ebd0caf4a",
    )
    .unwrap();
    let expected_public_key = PublicKey::from_uncompressed(expected).unwrap();
    let private_key = PrivateKey::try_from(private_key.as_ref()).unwrap();
    let public_key = PublicKey::from_private_key(&private_key);
    assert_eq!(public_key.0, expected_public_key.0);
}

/// Test `aggregate_public_keys`
#[test]
fn test_aggregate_public_keys_1() {
    // Public keys
    let public_key_1 = PublicKey(G2::one());
    let public_key_2 = PublicKey(G2::one());

    // Aggregation
    let agg_public_key = public_key_1 + public_key_2;

    // Check
    let expected = hex::decode("0b061848379c6bccd9e821e63ff6932738835b78e1e10079a0866073eba5b8bb444afbb053d16542e2b839477434966e5a9099093b6b3351f84ac19fe28f096548").unwrap();
    assert_eq!(agg_public_key.to_compressed().unwrap(), expected);
}

/// Test `aggregate_signatures`
#[test]
fn test_aggregate_signatures_1() {
    // Signatures (as valid points on G1)
    let sign_1 = Signature(bn::G1::one());
    let sign_2 = Signature(bn::G1::one());

    // Aggregation
    let aggregate_signature = sign_1 + sign_2;

    // Check
    let expected = hex::decode("02030644e72e131a029b85045b68181585d97816a916871ca8d3c208c16d87cfd3").unwrap();
    assert_eq!(aggregate_signature.to_compressed().unwrap(), expected);
}