dependency update

src/RAVEBase.sol

@@ -2,7 +2,7 @@
 pragma solidity >=0.8.0 <0.9.0;
 
 import { BytesUtils } from "./BytesUtils.sol";
-import { RSAVerify } from "ens-contracts/dnssec-oracle/algorithms/RSAVerify.sol";
+import { RSAVerify } from "./RSAVerify.sol";
 import { IRave } from "rave/IRave.sol";
 
 abstract contract RAVEBase is IRave {

src/RSAVerify.sol

@@ -0,0 +1,37 @@
+pragma solidity >=0.8.0 <0.9.0;
+
+// Copied from https://github.com/ensdomains/ens-contracts/blob/80aa5108f11d11cd7956135ef21ac45da8eb934d/contracts/dnssec-oracle/algorithms/RSAVerify.sol
+
+library ModexpPrecompile {
+    /**
+     * @dev Computes (base ^ exponent) % modulus over big numbers.
+     */
+    function modexp(bytes memory base, bytes memory exponent, bytes memory modulus)
+        internal
+        view
+        returns (bool success, bytes memory output)
+    {
+        bytes memory input = abi.encodePacked(
+            uint256(base.length), uint256(exponent.length), uint256(modulus.length), base, exponent, modulus
+        );
+
+        output = new bytes(modulus.length);
+
+        assembly {
+            success := staticcall(gas(), 5, add(input, 32), mload(input), add(output, 32), mload(modulus))
+        }
+    }
+}
+
+library RSAVerify {
+    /**
+     * @dev Recovers the input data from an RSA signature, returning the result in S.
+     * @param N The RSA public modulus.
+     * @param E The RSA public exponent.
+     * @param S The signature to recover.
+     * @return True if the recovery succeeded.
+     */
+    function rsarecover(bytes memory N, bytes memory E, bytes memory S) internal view returns (bool, bytes memory) {
+        return ModexpPrecompile.modexp(S, E, N);
+    }
+}

src/X509Verifier.sol

@@ -2,7 +2,7 @@
 pragma solidity >=0.8.0 <0.9.0;
 
 import { Asn1Decode, NodePtr } from "rave/ASN1Decode.sol";
-import { RSAVerify } from "ens-contracts/dnssec-oracle/algorithms/RSAVerify.sol";
+import { RSAVerify } from "./RSAVerify.sol";
 import { BytesUtils } from "./BytesUtils.sol";
 
 library X509Verifier {