{ "contractName": "P256SHA256Algorithm", "abi": [ { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" }, { "internalType": "uint256", "name": "x1", "type": "uint256" }, { "internalType": "uint256", "name": "y1", "type": "uint256" } ], "name": "add", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" }, { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x1", "type": "uint256" }, { "internalType": "uint256", "name": "y1", "type": "uint256" }, { "internalType": "uint256", "name": "x2", "type": "uint256" }, { "internalType": "uint256", "name": "y2", "type": "uint256" } ], "name": "addAndReturnProjectivePoint", "outputs": [ { "internalType": "uint256[3]", "name": "P", "type": "uint256[3]" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" }, { "internalType": "uint256", "name": "z0", "type": "uint256" }, { "internalType": "uint256", "name": "x1", "type": "uint256" }, { "internalType": "uint256", "name": "y1", "type": "uint256" }, { "internalType": "uint256", "name": "z1", "type": "uint256" } ], "name": "addProj", "outputs": [ { "internalType": "uint256", "name": "x2", "type": "uint256" }, { "internalType": "uint256", "name": "y2", "type": "uint256" }, { "internalType": "uint256", "name": "z2", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x", "type": "uint256" }, { "internalType": "uint256", "name": "y", "type": "uint256" } ], "name": "isOnCurve", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" } ], "name": "isZeroCurve", "outputs": [ { "internalType": "bool", "name": "isZero", "type": "bool" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "scalar", "type": "uint256" } ], "name": "multipleGeneratorByScalar", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" }, { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" }, { "internalType": "uint256", "name": "exp", "type": "uint256" } ], "name": "multiplyPowerBase2", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" }, { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" }, { "internalType": "uint256", "name": "scalar", "type": "uint256" } ], "name": "multiplyScalar", "outputs": [ { "internalType": "uint256", "name": "x1", "type": "uint256" }, { "internalType": "uint256", "name": "y1", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" }, { "internalType": "uint256", "name": "z0", "type": "uint256" } ], "name": "toAffinePoint", "outputs": [ { "internalType": "uint256", "name": "x1", "type": "uint256" }, { "internalType": "uint256", "name": "y1", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" } ], "name": "toProjectivePoint", "outputs": [ { "internalType": "uint256[3]", "name": "P", "type": "uint256[3]" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" } ], "name": "twice", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" }, { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "x0", "type": "uint256" }, { "internalType": "uint256", "name": "y0", "type": "uint256" }, { "internalType": "uint256", "name": "z0", "type": "uint256" } ], "name": "twiceProj", "outputs": [ { "internalType": "uint256", "name": "x1", "type": "uint256" }, { "internalType": "uint256", "name": "y1", "type": "uint256" }, { "internalType": "uint256", "name": "z1", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "bytes32", "name": "message", "type": "bytes32" }, { "internalType": "uint256[2]", "name": "rs", "type": "uint256[2]" }, { "internalType": "uint256[2]", "name": "Q", "type": "uint256[2]" } ], "name": "validateSignature", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [], "name": "zeroAffine", "outputs": [ { "internalType": "uint256", "name": "x", "type": "uint256" }, { "internalType": "uint256", "name": "y", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [], "name": "zeroProj", "outputs": [ { "internalType": "uint256", "name": "x", "type": "uint256" }, { "internalType": "uint256", "name": "y", "type": "uint256" }, { "internalType": "uint256", "name": "z", "type": "uint256" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [ { "internalType": "bytes", "name": "key", "type": "bytes" }, { "internalType": "bytes", "name": "data", "type": "bytes" }, { "internalType": "bytes", "name": "signature", "type": "bytes" } ], "name": "verify", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" } ], "metadata": 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See https://www.nayuki.io/page/elliptic-curve-point-addition-in-projective-coordinates\"},\"isOnCurve(uint256,uint256)\":{\"details\":\"Check if a point in affine coordinates is on the curve.\"},\"isZeroCurve(uint256,uint256)\":{\"details\":\"Check if the curve is the zero curve.\"},\"multipleGeneratorByScalar(uint256)\":{\"details\":\"Multiply the curve's generator point by a scalar.\"},\"multiplyPowerBase2(uint256,uint256,uint256)\":{\"details\":\"Multiply an elliptic curve point by a 2 power base (i.e., (2^exp)*P)).\"},\"multiplyScalar(uint256,uint256,uint256)\":{\"details\":\"Multiply an elliptic curve point by a scalar.\"},\"toAffinePoint(uint256,uint256,uint256)\":{\"details\":\"Transform from projective to affine coordinates.\"},\"toProjectivePoint(uint256,uint256)\":{\"details\":\"Transform affine coordinates into projective coordinates.\"},\"twice(uint256,uint256)\":{\"details\":\"Double an elliptic curve point in affine coordinates.\"},\"twiceProj(uint256,uint256,uint256)\":{\"details\":\"Double an elliptic curve point in projective coordinates. See https://www.nayuki.io/page/elliptic-curve-point-addition-in-projective-coordinates\"},\"validateSignature(bytes32,uint256[2],uint256[2])\":{\"details\":\"Validate combination of message, signature, and public key.\"},\"verify(bytes,bytes,bytes)\":{\"details\":\"Verifies a signature.\",\"params\":{\"data\":\"The signed data to verify.\",\"key\":\"The public key to verify with.\",\"signature\":\"The signature to verify.\"},\"returns\":{\"_0\":\"True iff the signature is valid.\"}},\"zeroAffine()\":{\"details\":\"Return the zero curve in affine coordinates.\"},\"zeroProj()\":{\"details\":\"Return the zero curve in projective 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"source": "pragma solidity ^0.7.4;\n\nimport \"./Algorithm.sol\";\nimport \"./EllipticCurve.sol\";\nimport \"../BytesUtils.sol\";\n\ncontract P256SHA256Algorithm is Algorithm, EllipticCurve {\n\n using BytesUtils for *;\n\n /**\n * @dev Verifies a signature.\n * @param key The public key to verify with.\n * @param data The signed data to verify.\n * @param signature The signature to verify.\n * @return True iff the signature is valid.\n */\n function verify(bytes calldata key, bytes calldata data, bytes calldata signature) external override view returns (bool) {\n return validateSignature(sha256(data), parseSignature(signature), parseKey(key));\n }\n\n function parseSignature(bytes memory data) internal pure returns (uint256[2] memory) {\n return [uint256(data.readBytes32(0)), uint256(data.readBytes32(32))];\n }\n\n function parseKey(bytes memory data) internal pure returns (uint256[2] memory) {\n return [uint256(data.readBytes32(4)), uint256(data.readBytes32(36))];\n }\n}\n", "sourcePath": "/home/arachnid/Dropbox/projects/enssec/contracts/algorithms/P256SHA256Algorithm.sol", "ast": { "absolutePath": "/home/arachnid/Dropbox/projects/enssec/contracts/algorithms/P256SHA256Algorithm.sol", "exportedSymbols": { "Algorithm": [ 3863 ], "BytesUtils": [ 730 ], "EllipticCurve": [ 5243 ], "P256SHA256Algorithm": [ 5438 ] }, "id": 5439, "nodeType": "SourceUnit", "nodes": [ { "id": 5350, "literals": [ "solidity", "^", "0.7", ".4" ], "nodeType": "PragmaDirective", "src": "0:23:10" }, { "absolutePath": "/home/arachnid/Dropbox/projects/enssec/contracts/algorithms/Algorithm.sol", "file": "./Algorithm.sol", "id": 5351, "nodeType": "ImportDirective", "scope": 5439, "sourceUnit": 3864, "src": "25:25:10", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/home/arachnid/Dropbox/projects/enssec/contracts/algorithms/EllipticCurve.sol", "file": "./EllipticCurve.sol", "id": 5352, "nodeType": "ImportDirective", "scope": 5439, "sourceUnit": 5244, "src": "51:29:10", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/home/arachnid/Dropbox/projects/enssec/contracts/BytesUtils.sol", "file": "../BytesUtils.sol", "id": 5353, "nodeType": "ImportDirective", "scope": 5439, "sourceUnit": 731, "src": "81:27:10", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 5354, "name": "Algorithm", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 3863, "src": "142:9:10", "typeDescriptions": { "typeIdentifier": "t_contract$_Algorithm_$3863", "typeString": "contract Algorithm" } }, "id": 5355, "nodeType": "InheritanceSpecifier", "src": "142:9:10" }, { "baseName": { "id": 5356, "name": "EllipticCurve", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 5243, "src": "153:13:10", "typeDescriptions": { "typeIdentifier": "t_contract$_EllipticCurve_$5243", "typeString": "contract EllipticCurve" } }, "id": 5357, "nodeType": "InheritanceSpecifier", "src": "153:13:10" } ], "contractDependencies": [ 3863, 5243 ], "contractKind": "contract", "fullyImplemented": true, "id": 5438, "linearizedBaseContracts": [ 5438, 5243, 3863 ], "name": "P256SHA256Algorithm", "nodeType": "ContractDefinition", "nodes": [ { "id": 5359, "libraryName": { "id": 5358, "name": "BytesUtils", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 730, "src": "180:10:10", "typeDescriptions": { "typeIdentifier": "t_contract$_BytesUtils_$730", "typeString": "library BytesUtils" } }, "nodeType": "UsingForDirective", "src": "174:23:10" }, { "baseFunctions": [ 3862 ], "body": { "id": 5384, "nodeType": "Block", "src": "560:97:10", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "id": 5374, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5364, "src": "602:4:10", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_calldata_ptr", 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