AWS WASM Checksums

WASM implementations of the checksums supported by the Smithy httpChecksum trait. The WASM implementation are based on the WASM component model.

Using this package

This package supports 5 checksum algorithms: CRC32, CRC32C, CRC64NVME, SHA1, and SHA256.

Associated with each of these algorithms are two functions, one for hashing to bytes and another for hashing and encoding as a baase64 string:

function crc64NvmeHash(input: Uint8Array): Uint8Array;
function crc64NvmeHashAndEncode(input: Uint8Array): string;

Each algorithm also has an associated accumulating Hasher class, useful for usecases where the full set of bytes to be hashed might not be known up front. The Hasher provides functions finalize and finalizeAndEncode which return bytes and a base64 encoded string respectively.

let hasher = new crc64NvmeHasher.Hasher();
hasher.update(stringToUint8Array("Hello,"));
hasher.update(stringToUint8Array(" World!"));
let hashOut = hasher.finalize();

Working with this Repo

To work on this repo you will need Rust, Node, and cargo-component installed.

To build the project run:

npm install
cargo install cargo-component
npx vitest init browser
npm run build

To run tests against the javascript bindings run:

npm run test

Security

See CONTRIBUTING for more information.

License

This project is licensed under the Apache-2.0 License.