openzeppelin-solidity
xss-filters
openzeppelin-solidity | xss-filters | |
---|---|---|
4 | 2 | |
10,805 | 1,022 | |
- | - | |
9.4 | 0.0 | |
almost 3 years ago | - | |
JavaScript | JavaScript | |
MIT License | - |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
openzeppelin-solidity
-
Attack Vectors in Solidity #6:Unexpected Ether( Incorrect Use of this.balance)
pragma solidity ^0.5.0; import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/math/SafeMath.sol"; contract MyContract { using SafeMath for uint256; function deposit() public payable { // code to deposit ether } function withdraw(uint256 _amount) public { require(this.balance.sub(_amount) >= 0, "Insufficient funds"); // code to withdraw ether } }
-
How to check if tokenholder is holding 2 different tokens at the same time before an event is triggered?
The basic structure could be done as follows using OZ ERC20 interface https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/token/ERC20/IERC20.sol
-
Is this why shib price keeps going down?
return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0, "SafeMath: modulo by zero"); return a % b; }
-
can someone tell me what this contract wants?
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
xss-filters
- Técnicas de Programação Segura em JavaScript
-
How to Secure Nodejs Application.
As you can see in the snippet above, whatever the user puts in the search field, if not found in the database, will be sent back to the user in an unchanged form. What that means is that if an attacker puts JavaScript code instead of the product name in your search bar, the same JavaScript code will be executed. To validate the User input!You can use validator js or xss-filters for that.
What are some alternatives?
RegEx-DoS - :cop: :punch: RegEx Denial of Service (ReDos) Scanner
DOMPurify - DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify works with a secure default, but offers a lot of configurability and hooks. Demo:
openzeppelin-contracts - OpenZeppelin Contracts is a library for secure smart contract development.
js-xss - Sanitize untrusted HTML (to prevent XSS) with a configuration specified by a Whitelist
echidna - Ethereum smart contract fuzzer
sanitize-html - Clean up user-submitted HTML, preserving whitelisted elements and whitelisted attributes on a per-element basis. Built on htmlparser2 for speed and tolerance
eattheblocks - Source code for Eat The Blocks, a screencast for Ethereum Dapp Developers
Retire.js - scanner detecting the use of JavaScript libraries with known vulnerabilities. Can also generate an SBOM of the libraries it finds.
yulp - ➕ A low-level, highly efficient extension to Yul, an intermediate language for the Ethereum Virtual Machine.
Themis - Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.
bytecode-verifier - Compile Solidity source code and verify its bytecode matches the blockchain
cidaas SDK for JS - With this SDK, you can integrate cidaas smoothly and with minimal effort into your javascript application. It enables you to map the most important user flows for OAuth2 and OIDC compliant authentication. Secure – Fast – And unrivaled Swabian.