vrf-rs 0.0.0

Fast and extensible Elliptic Curve Verifiable Random Function (VRF) library; currently supporting secp256k1 and secp256r1 curves
Documentation 
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use super::*;
use crate::{error::VrfError, P256k1Sha256};

/// Test VRF prove for `P256-SHA256-TAI` cipher suite
/// ASCII: "sample"
/// Source: Example 10 (RFC9381, Appendix B.1)
#[test]
fn prove_1() {
    let vrf = P256k1Sha256::default();
    let secret_key = hex!("c9afa9d845ba75166b5c215767b1d6934e50c3db36e89b127b8a622b120f6721");
    let alpha = b"sample";
    let pi = vrf.prove(&secret_key, alpha).unwrap();

    let expected_pi = hex!(
            "035b5c726e8c0e2c488a107c600578ee75cb702343c153cb1eb8dec77f4b5071b4a53f0a46f018bc2c56e58d383f2305e0975972c26feea0eb122fe7893c15af376b33edf7de17c6ea056d4d82de6bc02f"
        ).to_vec();
    assert_eq!(pi, expected_pi);
}

/// Test VRF verify for `P256-SHA256-TAI` cipher suite
/// ASCII: "sample"
/// Source: Example 10 (RFC9381, Appendix B.1)
#[test]
fn verify_1() {
    let vrf = P256k1Sha256::default();
    let public_key = hex!("0360fed4ba255a9d31c961eb74c6356d68c049b8923b61fa6ce669622e60f29fb6");
    let alpha = b"sample";
    let pi = hex!(
        "035b5c726e8c0e2c488a107c600578ee75cb702343c153cb1eb8dec77f4b5071b4a53f0a46f018bc2c56e58d383f2305e0975972c26feea0eb122fe7893c15af376b33edf7de17c6ea056d4d82de6bc02f"
    );
    let beta = vrf.verify(&public_key, &pi, alpha).unwrap();

    let expected_beta = hex!("a3ad7b0ef73d8fc6655053ea22f9bede8c743f08bbed3d38821f0e16474b505e");
    assert_eq!(beta.as_slice(), expected_beta);
}

/// Test VRF prove for `P256-SHA256-TAI` cipher suite
/// ASCII: "test"
/// Source: Example 11 (RFC9381, Appendix B.1)
#[test]
fn prove_2() {
    let vrf = P256k1Sha256::default();
    let secret_key = hex!("c9afa9d845ba75166b5c215767b1d6934e50c3db36e89b127b8a622b120f6721");
    let alpha = b"test";
    let pi = vrf.prove(&secret_key, alpha).unwrap();

    let expected_pi = hex!(
            "034dac60aba508ba0c01aa9be80377ebd7562c4a52d74722e0abae7dc3080ddb56c19e067b15a8a8174905b13617804534214f935b94c2287f797e393eb0816969d864f37625b443f30f1a5a33f2b3c854"
        ).to_vec();
    assert_eq!(pi, expected_pi);
}

/// Test VRF verify for `P256-SHA256-TAI` cipher suite
/// ASCII: "test"
/// Source: Example 11 (RFC9381, Appendix B.1)
#[test]
fn verify_2() {
    let vrf = P256k1Sha256::default();
    let public_key = hex!("0360fed4ba255a9d31c961eb74c6356d68c049b8923b61fa6ce669622e60f29fb6");
    let alpha = b"test";
    let pi = hex!(
        "034dac60aba508ba0c01aa9be80377ebd7562c4a52d74722e0abae7dc3080ddb56c19e067b15a8a8174905b13617804534214f935b94c2287f797e393eb0816969d864f37625b443f30f1a5a33f2b3c854"
    );
    let beta = vrf.verify(&public_key, &pi, alpha).unwrap();

    let expected_beta = hex!("a284f94ceec2ff4b3794629da7cbafa49121972671b466cab4ce170aa365f26d");
    assert_eq!(beta.as_slice(), expected_beta);
}

/// Test VRF prove for `P256-SHA256-TAI` cipher suite
/// ASCII: "Example using ECDSA key from Appendix L.4.2 of ANSI.X9-62-2005"
/// Source: Example 12 (RFC9381, Appendix B.1)
#[test]
fn prove_3() {
    let vrf = P256k1Sha256::default();
    let secret_key = hex!("2ca1411a41b17b24cc8c3b089cfd033f1920202a6c0de8abb97df1498d50d2c8");
    let alpha = b"Example using ECDSA key from Appendix L.4.2 of ANSI.X9-62-2005";
    let pi = vrf.prove(&secret_key, alpha).unwrap();

    let expected_pi = hex!(
            "03d03398bf53aa23831d7d1b2937e005fb0062cbefa06796579f2a1fc7e7b8c667d091c00b0f5c3619d10ecea44363b5a599cadc5b2957e223fec62e81f7b4825fc799a771a3d7334b9186bdbee87316b1"
        ).to_vec();
    assert_eq!(pi, expected_pi);
}

/// Test VRF verify for `P256-SHA256-TAI` cipher suite
/// ASCII: "Example using ECDSA key from Appendix L.4.2 of ANSI.X9-62-2005"
/// Source: Example 12 (RFC9381, Appendix B.1)
#[test]
fn verify_3() {
    let vrf = P256k1Sha256::default();
    let public_key = hex!("03596375e6ce57e0f20294fc46bdfcfd19a39f8161b58695b3ec5b3d16427c274d");
    let alpha = b"Example using ECDSA key from Appendix L.4.2 of ANSI.X9-62-2005";
    let pi = hex!(
        "03d03398bf53aa23831d7d1b2937e005fb0062cbefa06796579f2a1fc7e7b8c667d091c00b0f5c3619d10ecea44363b5a599cadc5b2957e223fec62e81f7b4825fc799a771a3d7334b9186bdbee87316b1"
    );
    let beta = vrf.verify(&public_key, &pi, alpha).unwrap();

    let expected_beta = hex!("90871e06da5caa39a3c61578ebb844de8635e27ac0b13e829997d0d95dd98c19");
    assert_eq!(beta.as_slice(), expected_beta);
}

/// Test VRF decode proof for `P256-SHA256-TAI` cipher suite
#[test]
fn decode_proof() {
    let vrf = P256k1Sha256::default();
    let pi = hex!(
        "029bdca4cc39e57d97e2f42f88bcf0ecb1120fb67eb408a856050dbfbcbf57c524347fc46ccd87843ec0a9fdc090a407c6fbae8ac1480e240c58854897eabbc3a7bb61b201059f89186e7175af796d65e7"
    );
    let (gamma, c, s) = vrf.decode_proof(&pi).unwrap();

    let expected_gamma = hex!("029bdca4cc39e57d97e2f42f88bcf0ecb1120fb67eb408a856050dbfbcbf57c524");
    let expected_c = hex!("00000000000000000000000000000000347fc46ccd87843ec0a9fdc090a407c6");
    let expected_s = hex!("fbae8ac1480e240c58854897eabbc3a7bb61b201059f89186e7175af796d65e7");

    assert_eq!(gamma, expected_gamma);
    assert_eq!(c, expected_c);
    assert_eq!(s, expected_s);
}

/// Test VRF invalid verify for `P256-SHA256-TAI` cipher suite
/// ASCII: "notsample"
/// Source: Similar to Example 10 (RFC9381, Appendix B.1)
#[test]
fn verify_wrong_message() {
    let vrf = P256k1Sha256::default();
    let public_key = hex!("0360fed4ba255a9d31c961eb74c6356d68c049b8923b61fa6ce669622e60f29fb6");
    let alpha = b"notsample";
    let pi = hex!(
        "035b5c726e8c0e2c488a107c600578ee75cb702343c153cb1eb8dec77f4b5071b4a53f0a46f018bc2c56e58d383f2305e0975972c26feea0eb122fe7893c15af376b33edf7de17c6ea056d4d82de6bc02f"
    );
    let beta = vrf.verify(&public_key, &pi, alpha);

    assert!(beta.is_err());
    assert!(matches!(beta.unwrap_err(), VrfError::InvalidProof))
}

/// Test VRF invalid verify for `P256-SHA256-TAI` cipher suite
/// ASCII: "notsample"
/// Source: Similar to Example 10 (RFC9381, Appendix B.1)
#[test]
fn verify_malformed_proof() {
    let vrf = P256k1Sha256::default();
    let public_key = hex!("0360fed4ba255a9d31c961eb74c6356d68c049b8923b61fa6ce669622e60f29fb6");
    let alpha = b"sample";
    let pi = hex!("00000000000000000000000000000000");
    let beta = vrf.verify(&public_key, &pi, alpha);

    assert!(beta.is_err());
    assert!(matches!(beta.unwrap_err(), VrfError::InvalidPiLength))
}