27 lines
997 B
Solidity
27 lines
997 B
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import {P256} from "../../../utils/cryptography/P256.sol";
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import {IERC7913SignatureVerifier} from "../../../interfaces/IERC7913.sol";
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/**
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* @dev ERC-7913 signature verifier that support P256 (secp256r1) keys.
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*/
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contract ERC7913P256Verifier is IERC7913SignatureVerifier {
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/// @inheritdoc IERC7913SignatureVerifier
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function verify(bytes calldata key, bytes32 hash, bytes calldata signature) public view virtual returns (bytes4) {
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// Signature length may be 0x40 or 0x41.
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if (key.length == 0x40 && signature.length >= 0x40) {
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bytes32 qx = bytes32(key[0x00:0x20]);
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bytes32 qy = bytes32(key[0x20:0x40]);
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bytes32 r = bytes32(signature[0x00:0x20]);
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bytes32 s = bytes32(signature[0x20:0x40]);
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if (P256.verify(hash, r, s, qx, qy)) {
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return IERC7913SignatureVerifier.verify.selector;
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}
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}
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return 0xFFFFFFFF;
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}
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}
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