// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

import {ECDSA512} from "@solarity/solidity-lib/libs/crypto/ECDSA512.sol";

import {ICertificateSigner} from "../../interfaces/signers/ICertificateSigner.sol";

import {SHA512} from "../../utils/SHA512.sol";

contract CECDSA512Signer is ICertificateSigner, Initializable {
    using ECDSA512 for *;
    using SHA512 for *;

    ECDSA512.Parameters private _brainpoolP512r1CurveParams =
        ECDSA512.Parameters({
            a: hex"7830a3318b603b89e2327145ac234cc594cbdd8d3df91610a83441caea9863bc2ded5d5aa8253aa10a2ef1c98b9ac8b57f1117a72bf2c7b9e7c1ac4d77fc94ca",
            b: hex"3df91610a83441caea9863bc2ded5d5aa8253aa10a2ef1c98b9ac8b57f1117a72bf2c7b9e7c1ac4d77fc94cadc083e67984050b75ebae5dd2809bd638016f723",
            gx: hex"81aee4bdd82ed9645a21322e9c4c6a9385ed9f70b5d916c1b43b62eef4d0098eff3b1f78e2d0d48d50d1687b93b97d5f7c6d5047406a5e688b352209bcb9f822",
            gy: hex"7dde385d566332ecc0eabfa9cf7822fdf209f70024a57b1aa000c55b881f8111b2dcde494a5f485e5bca4bd88a2763aed1ca2b2fa8f0540678cd1e0f3ad80892",
            p: hex"aadd9db8dbe9c48b3fd4e6ae33c9fc07cb308db3b3c9d20ed6639cca703308717d4d9b009bc66842aecda12ae6a380e62881ff2f2d82c68528aa6056583a48f3",
            n: hex"aadd9db8dbe9c48b3fd4e6ae33c9fc07cb308db3b3c9d20ed6639cca70330870553e5c414ca92619418661197fac10471db1d381085ddaddb58796829ca90069"
        });

    function verifyICAOSignature(
        bytes memory x509SignedAttributes_,
        bytes memory icaoMemberSignature_,
        bytes memory icaoMemberKey_
    ) external view returns (bool) {
        return
            _brainpoolP512r1CurveParams.verify(
                x509SignedAttributes_.sha512(),
                icaoMemberSignature_,
                icaoMemberKey_
            );
    }
}