Create SHA-3 Hashes Online Generate SHA-3 (Keccak) hash digests from text input in your browser.

The tool works by utilizing the CryptoJS library to implement the Keccak sponge construction algorithm, which is the basis for SHA-3 hash generation. When a user inputs text and selects an output length, it invokes the onProcess function, passing in the input string and the chosen output length as parameters. The CryptoJS.SHA3 function then processes this input using 24 rounds of five operations: theta, rho, pi, chi, and iota, with the rate dependent on the specified output size. This process is facilitated by React's useState hook to manage the output length state and useCallback to memoize the onProcess function, ensuring that it only re-renders when the output length changes.

Underneath this implementation lies a 1600-bit internal state represented as a 5x5 array of 64-bit words. The tool's client-side architecture ensures that all hash generation occurs locally within the browser, eliminating the need to transmit sensitive data over the network. By using CryptoJS with its default output length set to SHA3-512, it provides an efficient way to generate hashes while preventing common attacks such as length-extension attacks due to the inherent properties of the Keccak algorithm. The output lengths supported by the tool - 224, 256, 384, and 512 bits - are directly tied to the rate at which data is fed into the sponge construction during hash generation.

In terms of technical specifics, the SHA-3 implementation in CryptoJS relies on JavaScript's built-in support for bitwise operations to perform the necessary transformations on the input data. This includes shifting, XORing, and other low-level bit manipulations that are fundamental to cryptographic hash functions like SHA-3. By leveraging these capabilities within a web browser environment, developers can generate reliable SHA-3 hashes without needing to resort to server-side infrastructure or command-line tools. The result is an efficient and easy-to-use tool for generating SHA-3 hashes in various contexts, from testing cryptographic protocols to validating data integrity in real-world applications.