pragma solidity ^0.8.4;

import "./Digest.sol";
import "../../utils/BytesUtils.sol";
import "@ensdomains/solsha1/contracts/SHA1.sol";

/// @dev Implements the DNSSEC SHA1 digest.
contract SHA1Digest is Digest {
    using BytesUtils for *;

    function verify(
        bytes calldata data,
        bytes calldata hash
    ) external pure override returns (bool) {
        require(hash.length == 20, "Invalid sha1 hash length");
        bytes32 expected = hash.readBytes20(0);
        bytes20 computed = SHA1.sha1(data);
        return expected == computed;
    }
}