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use deno_core::error::null_opbuf;
use deno_core::error::AnyError;
use deno_core::include_js_files;
use deno_core::op_sync;
use deno_core::Extension;
use deno_core::OpState;
use deno_core::ZeroCopyBuf;
use rand::rngs::StdRng;
use rand::thread_rng;
use rand::Rng;
use rand::SeedableRng;
use std::path::PathBuf;
pub use rand;
pub fn init(maybe_seed: Option<u64>) -> Extension {
Extension::builder()
.js(include_js_files!(
prefix "deno:extensions/crypto",
"01_crypto.js",
))
.ops(vec![(
"op_crypto_get_random_values",
op_sync(op_crypto_get_random_values),
)])
.state(move |state| {
if let Some(seed) = maybe_seed {
state.put(StdRng::seed_from_u64(seed));
}
Ok(())
})
.build()
}
pub fn op_crypto_get_random_values(
state: &mut OpState,
_args: (),
zero_copy: Option<ZeroCopyBuf>,
) -> Result<(), AnyError> {
let mut zero_copy = zero_copy.ok_or_else(null_opbuf)?;
let maybe_seeded_rng = state.try_borrow_mut::<StdRng>();
if let Some(seeded_rng) = maybe_seeded_rng {
seeded_rng.fill(&mut *zero_copy);
} else {
let mut rng = thread_rng();
rng.fill(&mut *zero_copy);
}
Ok(())
}
pub fn get_declaration() -> PathBuf {
PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("lib.deno_crypto.d.ts")
}