{ "address": "0x5e5a01e17Ff2f49a84d8374A4034460d82AD9107", "abi": [ { "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" } ], "transactionHash": "0xd570bab21d40dcc343b857fc21e0c4f8d48c43bbffe0dfbfbdbd50cfb6cc59be", "receipt": { "to": null, "from": "0xa303ddC620aa7d1390BACcc8A495508B183fab59", "contractAddress": "0x5e5a01e17Ff2f49a84d8374A4034460d82AD9107", "transactionIndex": 8, "gasUsed": "2240436", "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", "blockHash": "0xa5c77d62b7010196a5aa03e58891177c5a3097c4df363d253029417f6b8ec7a6", "transactionHash": "0xd570bab21d40dcc343b857fc21e0c4f8d48c43bbffe0dfbfbdbd50cfb6cc59be", "logs": [], "blockNumber": 10645995, "cumulativeGasUsed": "2531328", "status": 1, "byzantium": true }, "args": [], "solcInputHash": "424cfdf012b9aa11d2e839569d49524c", "metadata": "{\"compiler\":{\"version\":\"0.8.4+commit.c7e474f2\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"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\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"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.\"}}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"contracts/dnssec-oracle/algorithms/P256SHA256Algorithm.sol\":\"P256SHA256Algorithm\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\",\"useLiteralContent\":true},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"contracts/dnssec-oracle/BytesUtils.sol\":{\"content\":\"pragma solidity ^0.8.4;\\n\\nlibrary BytesUtils {\\n /*\\n * @dev Returns the keccak-256 hash of a byte range.\\n * @param self The byte string to hash.\\n * @param offset The position to start hashing at.\\n * @param len The number of bytes to hash.\\n * @return The hash of the byte range.\\n */\\n function keccak(bytes memory self, uint offset, uint len) internal pure returns (bytes32 ret) {\\n require(offset + len <= self.length);\\n assembly {\\n ret := keccak256(add(add(self, 32), offset), len)\\n }\\n }\\n\\n\\n /*\\n * @dev Returns a positive number if `other` comes lexicographically after\\n * `self`, a negative number if it comes before, or zero if the\\n * contents of the two bytes are equal.\\n * @param self The first bytes to compare.\\n * @param other The second bytes to compare.\\n * @return The result of the comparison.\\n */\\n function compare(bytes memory self, bytes memory other) internal pure returns (int) {\\n return compare(self, 0, self.length, other, 0, other.length);\\n }\\n\\n /*\\n * @dev Returns a positive number if `other` comes lexicographically after\\n * `self`, a negative number if it comes before, or zero if the\\n * contents of the two bytes are equal. Comparison is done per-rune,\\n * on unicode codepoints.\\n * @param self The first bytes to compare.\\n * @param offset The offset of self.\\n * @param len The length of self.\\n * @param other The second bytes to compare.\\n * @param otheroffset The offset of the other string.\\n * @param otherlen The length of the other string.\\n * @return The result of the comparison.\\n */\\n function compare(bytes memory self, uint offset, uint len, bytes memory other, uint otheroffset, uint otherlen) internal pure returns (int) {\\n uint shortest = len;\\n if (otherlen < len)\\n shortest = otherlen;\\n\\n uint selfptr;\\n uint otherptr;\\n\\n assembly {\\n selfptr := add(self, add(offset, 32))\\n otherptr := add(other, add(otheroffset, 32))\\n }\\n for (uint idx = 0; idx < shortest; idx += 32) {\\n uint a;\\n uint b;\\n assembly {\\n a := mload(selfptr)\\n b := mload(otherptr)\\n }\\n if (a != b) {\\n // Mask out irrelevant bytes and check again\\n uint mask;\\n if (shortest > 32) {\\n mask = type(uint256).max;\\n } else {\\n mask = ~(2 ** (8 * (32 - shortest + idx)) - 1);\\n }\\n int diff = int(a & mask) - int(b & mask);\\n if (diff != 0)\\n return diff;\\n }\\n selfptr += 32;\\n otherptr += 32;\\n }\\n\\n return int(len) - int(otherlen);\\n }\\n\\n /*\\n * @dev Returns true if the two byte ranges are equal.\\n * @param self The first byte range to compare.\\n * @param offset The offset into the first byte range.\\n * @param other The second byte range to compare.\\n * @param otherOffset The offset into the second byte range.\\n * @param len The number of bytes to compare\\n * @return True if the byte ranges are equal, false otherwise.\\n */\\n function equals(bytes memory self, uint offset, bytes memory other, uint otherOffset, uint len) internal pure returns (bool) {\\n return keccak(self, offset, len) == keccak(other, otherOffset, len);\\n }\\n\\n /*\\n * @dev Returns true if the two byte ranges are equal with offsets.\\n * @param self The first byte range to compare.\\n * @param offset The offset into the first byte range.\\n * @param other The second byte range to compare.\\n * @param otherOffset The offset into the second byte range.\\n * @return True if the byte ranges are equal, false otherwise.\\n */\\n function equals(bytes memory self, uint offset, bytes memory other, uint otherOffset) internal pure returns (bool) {\\n return keccak(self, offset, self.length - offset) == keccak(other, otherOffset, other.length - otherOffset);\\n }\\n\\n /*\\n * @dev Compares a range of 'self' to all of 'other' and returns True iff\\n * they are equal.\\n * @param self The first byte range to compare.\\n * @param offset The offset into the first byte range.\\n * @param other The second byte range to compare.\\n * @return True if the byte ranges are equal, false otherwise.\\n */\\n function equals(bytes memory self, uint offset, bytes memory other) internal pure returns (bool) {\\n return self.length >= offset + other.length && equals(self, offset, other, 0, other.length);\\n }\\n\\n /*\\n * @dev Returns true if the two byte ranges are equal.\\n * @param self The first byte range to compare.\\n * @param other The second byte range to compare.\\n * @return True if the byte ranges are equal, false otherwise.\\n */\\n function equals(bytes memory self, bytes memory other) internal pure returns(bool) {\\n return self.length == other.length && equals(self, 0, other, 0, self.length);\\n }\\n\\n /*\\n * @dev Returns the 8-bit number at the specified index of self.\\n * @param self The byte string.\\n * @param idx The index into the bytes\\n * @return The specified 8 bits of the string, interpreted as an integer.\\n */\\n function readUint8(bytes memory self, uint idx) internal pure returns (uint8 ret) {\\n return uint8(self[idx]);\\n }\\n\\n /*\\n * @dev Returns the 16-bit number at the specified index of self.\\n * @param self The byte string.\\n * @param idx The index into the bytes\\n * @return The specified 16 bits of the string, interpreted as an integer.\\n */\\n function readUint16(bytes memory self, uint idx) internal pure returns (uint16 ret) {\\n require(idx + 2 <= self.length);\\n assembly {\\n ret := and(mload(add(add(self, 2), idx)), 0xFFFF)\\n }\\n }\\n\\n /*\\n * @dev Returns the 32-bit number at the specified index of self.\\n * @param self The byte string.\\n * @param idx The index into the bytes\\n * @return The specified 32 bits of the string, interpreted as an integer.\\n */\\n function readUint32(bytes memory self, uint idx) internal pure returns (uint32 ret) {\\n require(idx + 4 <= self.length);\\n assembly {\\n ret := and(mload(add(add(self, 4), idx)), 0xFFFFFFFF)\\n }\\n }\\n\\n /*\\n * @dev Returns the 32 byte value at the specified index of self.\\n * @param self The byte string.\\n * @param idx The index into the bytes\\n * @return The specified 32 bytes of the string.\\n */\\n function readBytes32(bytes memory self, uint idx) internal pure returns (bytes32 ret) {\\n require(idx + 32 <= self.length);\\n assembly {\\n ret := mload(add(add(self, 32), idx))\\n }\\n }\\n\\n /*\\n * @dev Returns the 32 byte value at the specified index of self.\\n * @param self The byte string.\\n * @param idx The index into the bytes\\n * @return The specified 32 bytes of the string.\\n */\\n function readBytes20(bytes memory self, uint idx) internal pure returns (bytes20 ret) {\\n require(idx + 20 <= self.length);\\n assembly {\\n ret := and(mload(add(add(self, 32), idx)), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000000)\\n }\\n }\\n\\n /*\\n * @dev Returns the n byte value at the specified index of self.\\n * @param self The byte string.\\n * @param idx The index into the bytes.\\n * @param len The number of bytes.\\n * @return The specified 32 bytes of the string.\\n */\\n function readBytesN(bytes memory self, uint idx, uint len) internal pure returns (bytes32 ret) {\\n require(len <= 32);\\n require(idx + len <= self.length);\\n assembly {\\n let mask := not(sub(exp(256, sub(32, len)), 1))\\n ret := and(mload(add(add(self, 32), idx)), mask)\\n }\\n }\\n\\n function memcpy(uint dest, uint src, uint len) private pure {\\n // Copy word-length chunks while possible\\n for (; len >= 32; len -= 32) {\\n assembly {\\n mstore(dest, mload(src))\\n }\\n dest += 32;\\n src += 32;\\n }\\n\\n // Copy remaining bytes\\n unchecked {\\n uint mask = (256 ** (32 - len)) - 1;\\n assembly {\\n let srcpart := and(mload(src), not(mask))\\n let destpart := and(mload(dest), mask)\\n mstore(dest, or(destpart, srcpart))\\n }\\n }\\n }\\n\\n /*\\n * @dev Copies a substring into a new byte string.\\n * @param self The byte string to copy from.\\n * @param offset The offset to start copying at.\\n * @param len The number of bytes to copy.\\n */\\n function substring(bytes memory self, uint offset, uint len) internal pure returns(bytes memory) {\\n require(offset + len <= self.length);\\n\\n bytes memory ret = new bytes(len);\\n uint dest;\\n uint src;\\n\\n assembly {\\n dest := add(ret, 32)\\n src := add(add(self, 32), offset)\\n }\\n memcpy(dest, src, len);\\n\\n return ret;\\n }\\n\\n // Maps characters from 0x30 to 0x7A to their base32 values.\\n // 0xFF represents invalid characters in that range.\\n bytes constant base32HexTable = hex'00010203040506070809FFFFFFFFFFFFFF0A0B0C0D0E0F101112131415161718191A1B1C1D1E1FFFFFFFFFFFFFFFFFFFFF0A0B0C0D0E0F101112131415161718191A1B1C1D1E1F';\\n\\n /**\\n * @dev Decodes unpadded base32 data of up to one word in length.\\n * @param self The data to decode.\\n * @param off Offset into the string to start at.\\n * @param len Number of characters to decode.\\n * @return The decoded data, left aligned.\\n */\\n function base32HexDecodeWord(bytes memory self, uint off, uint len) internal pure returns(bytes32) {\\n require(len <= 52);\\n\\n uint ret = 0;\\n uint8 decoded;\\n for(uint i = 0; i < len; i++) {\\n bytes1 char = self[off + i];\\n require(char >= 0x30 && char <= 0x7A);\\n decoded = uint8(base32HexTable[uint(uint8(char)) - 0x30]);\\n require(decoded <= 0x20);\\n if(i == len - 1) {\\n break;\\n }\\n ret = (ret << 5) | decoded;\\n }\\n\\n uint bitlen = len * 5;\\n if(len % 8 == 0) {\\n // Multiple of 8 characters, no padding\\n ret = (ret << 5) | decoded;\\n } else if(len % 8 == 2) {\\n // Two extra characters - 1 byte\\n ret = (ret << 3) | (decoded >> 2);\\n bitlen -= 2;\\n } else if(len % 8 == 4) {\\n // Four extra characters - 2 bytes\\n ret = (ret << 1) | (decoded >> 4);\\n bitlen -= 4;\\n } else if(len % 8 == 5) {\\n // Five extra characters - 3 bytes\\n ret = (ret << 4) | (decoded >> 1);\\n bitlen -= 1;\\n } else if(len % 8 == 7) {\\n // Seven extra characters - 4 bytes\\n ret = (ret << 2) | (decoded >> 3);\\n bitlen -= 3;\\n } else {\\n revert();\\n }\\n\\n return bytes32(ret << (256 - bitlen));\\n }\\n}\",\"keccak256\":\"0x83315df2e54c74451577c70da2c267c3459802b08b9aeec6516302eee70f796e\"},\"contracts/dnssec-oracle/algorithms/Algorithm.sol\":{\"content\":\"pragma solidity ^0.8.4;\\n\\n/**\\n* @dev An interface for contracts implementing a DNSSEC (signing) algorithm.\\n*/\\ninterface Algorithm {\\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 virtual view returns (bool);\\n}\\n\",\"keccak256\":\"0x51d6251568844e435f58952354abe8c8c8e978ab40ecb0bbb2f5bd767838b3a7\"},\"contracts/dnssec-oracle/algorithms/EllipticCurve.sol\":{\"content\":\"pragma solidity ^0.8.4;\\n\\n/**\\n * @title EllipticCurve\\n *\\n * @author Tilman Drerup;\\n *\\n * @notice Implements elliptic curve math; Parametrized for SECP256R1.\\n *\\n * Includes components of code by Andreas Olofsson, Alexander Vlasov\\n * (https://github.com/BANKEX/CurveArithmetics), and Avi Asayag\\n * (https://github.com/orbs-network/elliptic-curve-solidity)\\n *\\n * Source: https://github.com/tdrerup/elliptic-curve-solidity\\n *\\n * @dev NOTE: To disambiguate public keys when verifying signatures, activate\\n * condition 'rs[1] > lowSmax' in validateSignature().\\n */\\ncontract EllipticCurve {\\n\\n // Set parameters for curve.\\n uint constant a = 0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC;\\n uint constant b = 0x5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B;\\n uint constant gx = 0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296;\\n uint constant gy = 0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5;\\n uint constant p = 0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF;\\n uint constant n = 0xFFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551;\\n\\n uint constant lowSmax = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0;\\n\\n /**\\n * @dev Inverse of u in the field of modulo m.\\n */\\n function inverseMod(uint u, uint m) internal pure\\n returns (uint)\\n {\\n unchecked {\\n if (u == 0 || u == m || m == 0)\\n return 0;\\n if (u > m)\\n u = u % m;\\n\\n int t1;\\n int t2 = 1;\\n uint r1 = m;\\n uint r2 = u;\\n uint q;\\n\\n while (r2 != 0) {\\n q = r1 / r2;\\n (t1, t2, r1, r2) = (t2, t1 - int(q) * t2, r2, r1 - q * r2);\\n }\\n\\n if (t1 < 0)\\n return (m - uint(-t1));\\n\\n return uint(t1);\\n }\\n }\\n\\n /**\\n * @dev Transform affine coordinates into projective coordinates.\\n */\\n function toProjectivePoint(uint x0, uint y0) internal pure\\n returns (uint[3] memory P)\\n {\\n P[2] = addmod(0, 1, p);\\n P[0] = mulmod(x0, P[2], p);\\n P[1] = mulmod(y0, P[2], p);\\n }\\n\\n /**\\n * @dev Add two points in affine coordinates and return projective point.\\n */\\n function addAndReturnProjectivePoint(uint x1, uint y1, uint x2, uint y2) internal pure\\n returns (uint[3] memory P)\\n {\\n uint x;\\n uint y;\\n (x, y) = add(x1, y1, x2, y2);\\n P = toProjectivePoint(x, y);\\n }\\n\\n /**\\n * @dev Transform from projective to affine coordinates.\\n */\\n function toAffinePoint(uint x0, uint y0, uint z0) internal pure\\n returns (uint x1, uint y1)\\n {\\n uint z0Inv;\\n z0Inv = inverseMod(z0, p);\\n x1 = mulmod(x0, z0Inv, p);\\n y1 = mulmod(y0, z0Inv, p);\\n }\\n\\n /**\\n * @dev Return the zero curve in projective coordinates.\\n */\\n function zeroProj() internal pure\\n returns (uint x, uint y, uint z)\\n {\\n return (0, 1, 0);\\n }\\n\\n /**\\n * @dev Return the zero curve in affine coordinates.\\n */\\n function zeroAffine() internal pure\\n returns (uint x, uint y)\\n {\\n return (0, 0);\\n }\\n\\n /**\\n * @dev Check if the curve is the zero curve.\\n */\\n function isZeroCurve(uint x0, uint y0) internal pure\\n returns (bool isZero)\\n {\\n if(x0 == 0 && y0 == 0) {\\n return true;\\n }\\n return false;\\n }\\n\\n /**\\n * @dev Check if a point in affine coordinates is on the curve.\\n */\\n function isOnCurve(uint x, uint y) internal pure\\n returns (bool)\\n {\\n if (0 == x || x == p || 0 == y || y == p) {\\n return false;\\n }\\n\\n uint LHS = mulmod(y, y, p); // y^2\\n uint RHS = mulmod(mulmod(x, x, p), x, p); // x^3\\n\\n if (a != 0) {\\n RHS = addmod(RHS, mulmod(x, a, p), p); // x^3 + a*x\\n }\\n if (b != 0) {\\n RHS = addmod(RHS, b, p); // x^3 + a*x + b\\n }\\n\\n return LHS == RHS;\\n }\\n\\n /**\\n * @dev Double an elliptic curve point in projective coordinates. See\\n * https://www.nayuki.io/page/elliptic-curve-point-addition-in-projective-coordinates\\n */\\n function twiceProj(uint x0, uint y0, uint z0) internal pure\\n returns (uint x1, uint y1, uint z1)\\n {\\n uint t;\\n uint u;\\n uint v;\\n uint w;\\n\\n if(isZeroCurve(x0, y0)) {\\n return zeroProj();\\n }\\n\\n u = mulmod(y0, z0, p);\\n u = mulmod(u, 2, p);\\n\\n v = mulmod(u, x0, p);\\n v = mulmod(v, y0, p);\\n v = mulmod(v, 2, p);\\n\\n x0 = mulmod(x0, x0, p);\\n t = mulmod(x0, 3, p);\\n\\n z0 = mulmod(z0, z0, p);\\n z0 = mulmod(z0, a, p);\\n t = addmod(t, z0, p);\\n\\n w = mulmod(t, t, p);\\n x0 = mulmod(2, v, p);\\n w = addmod(w, p-x0, p);\\n\\n x0 = addmod(v, p-w, p);\\n x0 = mulmod(t, x0, p);\\n y0 = mulmod(y0, u, p);\\n y0 = mulmod(y0, y0, p);\\n y0 = mulmod(2, y0, p);\\n y1 = addmod(x0, p-y0, p);\\n\\n x1 = mulmod(u, w, p);\\n\\n z1 = mulmod(u, u, p);\\n z1 = mulmod(z1, u, p);\\n }\\n\\n /**\\n * @dev Add two elliptic curve points in projective coordinates. See\\n * https://www.nayuki.io/page/elliptic-curve-point-addition-in-projective-coordinates\\n */\\n function addProj(uint x0, uint y0, uint z0, uint x1, uint y1, uint z1) internal pure\\n returns (uint x2, uint y2, uint z2)\\n {\\n uint t0;\\n uint t1;\\n uint u0;\\n uint u1;\\n\\n if (isZeroCurve(x0, y0)) {\\n return (x1, y1, z1);\\n }\\n else if (isZeroCurve(x1, y1)) {\\n return (x0, y0, z0);\\n }\\n\\n t0 = mulmod(y0, z1, p);\\n t1 = mulmod(y1, z0, p);\\n\\n u0 = mulmod(x0, z1, p);\\n u1 = mulmod(x1, z0, p);\\n\\n if (u0 == u1) {\\n if (t0 == t1) {\\n return twiceProj(x0, y0, z0);\\n }\\n else {\\n return zeroProj();\\n }\\n }\\n\\n (x2, y2, z2) = addProj2(mulmod(z0, z1, p), u0, u1, t1, t0);\\n }\\n\\n /**\\n * @dev Helper function that splits addProj to avoid too many local variables.\\n */\\n function addProj2(uint v, uint u0, uint u1, uint t1, uint t0) private pure\\n returns (uint x2, uint y2, uint z2)\\n {\\n uint u;\\n uint u2;\\n uint u3;\\n uint w;\\n uint t;\\n\\n t = addmod(t0, p-t1, p);\\n u = addmod(u0, p-u1, p);\\n u2 = mulmod(u, u, p);\\n\\n w = mulmod(t, t, p);\\n w = mulmod(w, v, p);\\n u1 = addmod(u1, u0, p);\\n u1 = mulmod(u1, u2, p);\\n w = addmod(w, p-u1, p);\\n\\n x2 = mulmod(u, w, p);\\n\\n u3 = mulmod(u2, u, p);\\n u0 = mulmod(u0, u2, p);\\n u0 = addmod(u0, p-w, p);\\n t = mulmod(t, u0, p);\\n t0 = mulmod(t0, u3, p);\\n\\n y2 = addmod(t, p-t0, p);\\n\\n z2 = mulmod(u3, v, p);\\n }\\n\\n /**\\n * @dev Add two elliptic curve points in affine coordinates.\\n */\\n function add(uint x0, uint y0, uint x1, uint y1) internal pure\\n returns (uint, uint)\\n {\\n uint z0;\\n\\n (x0, y0, z0) = addProj(x0, y0, 1, x1, y1, 1);\\n\\n return toAffinePoint(x0, y0, z0);\\n }\\n\\n /**\\n * @dev Double an elliptic curve point in affine coordinates.\\n */\\n function twice(uint x0, uint y0) internal pure\\n returns (uint, uint)\\n {\\n uint z0;\\n\\n (x0, y0, z0) = twiceProj(x0, y0, 1);\\n\\n return toAffinePoint(x0, y0, z0);\\n }\\n\\n /**\\n * @dev Multiply an elliptic curve point by a 2 power base (i.e., (2^exp)*P)).\\n */\\n function multiplyPowerBase2(uint x0, uint y0, uint exp) internal pure\\n returns (uint, uint)\\n {\\n uint base2X = x0;\\n uint base2Y = y0;\\n uint base2Z = 1;\\n\\n for(uint i = 0; i < exp; i++) {\\n (base2X, base2Y, base2Z) = twiceProj(base2X, base2Y, base2Z);\\n }\\n\\n return toAffinePoint(base2X, base2Y, base2Z);\\n }\\n\\n /**\\n * @dev Multiply an elliptic curve point by a scalar.\\n */\\n function multiplyScalar(uint x0, uint y0, uint scalar) internal pure\\n returns (uint x1, uint y1)\\n {\\n if(scalar == 0) {\\n return zeroAffine();\\n }\\n else if (scalar == 1) {\\n return (x0, y0);\\n }\\n else if (scalar == 2) {\\n return twice(x0, y0);\\n }\\n\\n uint base2X = x0;\\n uint base2Y = y0;\\n uint base2Z = 1;\\n uint z1 = 1;\\n x1 = x0;\\n y1 = y0;\\n\\n if(scalar%2 == 0) {\\n x1 = y1 = 0;\\n }\\n\\n scalar = scalar >> 1;\\n\\n while(scalar > 0) {\\n (base2X, base2Y, base2Z) = twiceProj(base2X, base2Y, base2Z);\\n\\n if(scalar%2 == 1) {\\n (x1, y1, z1) = addProj(base2X, base2Y, base2Z, x1, y1, z1);\\n }\\n\\n scalar = scalar >> 1;\\n }\\n\\n return toAffinePoint(x1, y1, z1);\\n }\\n\\n /**\\n * @dev Multiply the curve's generator point by a scalar.\\n */\\n function multipleGeneratorByScalar(uint scalar) internal pure\\n returns (uint, uint)\\n {\\n return multiplyScalar(gx, gy, scalar);\\n }\\n\\n /**\\n * @dev Validate combination of message, signature, and public key.\\n */\\n function validateSignature(bytes32 message, uint[2] memory rs, uint[2] memory Q) internal pure\\n returns (bool)\\n {\\n\\n // To disambiguate between public key solutions, include comment below.\\n if(rs[0] == 0 || rs[0] >= n || rs[1] == 0) {// || rs[1] > lowSmax)\\n return false;\\n }\\n if (!isOnCurve(Q[0], Q[1])) {\\n return false;\\n }\\n\\n uint x1;\\n uint x2;\\n uint y1;\\n uint y2;\\n\\n uint sInv = inverseMod(rs[1], n);\\n (x1, y1) = multiplyScalar(gx, gy, mulmod(uint(message), sInv, n));\\n (x2, y2) = multiplyScalar(Q[0], Q[1], mulmod(rs[0], sInv, n));\\n uint[3] memory P = addAndReturnProjectivePoint(x1, y1, x2, y2);\\n\\n if (P[2] == 0) {\\n return false;\\n }\\n\\n uint Px = inverseMod(P[2], p);\\n Px = mulmod(P[0], mulmod(Px, Px, p), p);\\n\\n return Px % n == rs[0];\\n }\\n}\",\"keccak256\":\"0xa0dc7fe8a8877e69c22e3e2e47dbc8370027c27dbd6a22cf5d36a4c3679608c8\"},\"contracts/dnssec-oracle/algorithms/P256SHA256Algorithm.sol\":{\"content\":\"pragma solidity ^0.8.4;\\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 require(data.length == 64, \\\"Invalid p256 signature length\\\");\\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 require(data.length == 68, \\\"Invalid p256 key length\\\");\\n return [uint256(data.readBytes32(4)), uint256(data.readBytes32(36))];\\n }\\n}\\n\",\"keccak256\":\"0x60c0ee554d9a3a3f1cda75c49050143c2aaa33ade54b20d782322035baeb5f81\"}},\"version\":1}", "bytecode": 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"devdoc": { "kind": "dev", "methods": { "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." } } }, "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "version": 1 }, "storageLayout": { "storage": [], "types": null } }