std/_crypto_wasm is only for internal use, such as by
std/node/crypto. Its interface may not be stable between releases and it
should not be imported directly.
How to Build
Requires Rust's WASM target and the wasm-bindgen CLI.
cargo build --target wasm32-unknown-unknown rustup target add wasm32-unknown-unknown # This must match the version in hash/_wasm/Cargo.lock: cargo install -f wasm-bindgen-cli --version 0.2.74
deno run --allow-all ./_build.ts
This will regenerate
./crypto.wasm.js from the Rust source.