forked from realaravinth/tmp
55 lines
2.2 KiB
Rust
55 lines
2.2 KiB
Rust
//! mCaptcha is a proof of work based Denaial-of-Service attack protection system.
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//! This is is a WASM library that you can embed in your frontend code to protect your
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//! service.
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//!
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//! A commercial managed solution is in the works but I'd much rather prefer
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//! folks host their own instances as it will make the more decentralized and free.
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//!
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//! ## Workflow:
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//! mCaptcha workflow in the frontend is simple.
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//! 1. Call service to get a proof of work(PoW) configuration
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//! 2. Call into mCaptcha to get PoW
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//! 3. Send PoW to your service
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use wasm_bindgen::prelude::*;
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// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
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// allocator.
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#[cfg(feature = "wee_alloc")]
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#[global_allocator]
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static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
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use pow_sha256::PoW;
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#[wasm_bindgen]
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pub fn gen_pow(difficulty_factor: u32, secret: String) -> String {
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let difficulty = u128::max_value() - u128::max_value() / difficulty_factor as u128;
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let a = PoW::prove_work(&secret.as_bytes().to_vec(), difficulty).unwrap();
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let payload = serde_json::to_string(&a).unwrap();
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payload
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn it_works() {
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let payload = gen_pow(500, "MFsqLMZId629Dh2hrtux2Qdn3gBzCaSt".into());
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assert_eq!("{\"nonce\":312,\"result\":\"340175381422106372296624206295814425082\",\"_spook\":null}", &payload );
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let payload = gen_pow(1_000, "MFsqLMZId629Dh2hrtux2Qdn3gBzCaSt".into());
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assert_eq!("{\"nonce\":312,\"result\":\"340175381422106372296624206295814425082\",\"_spook\":null}", &payload);
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let payload = gen_pow(2_000, "MFsqLMZId629Dh2hrtux2Qdn3gBzCaSt".into());
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assert_eq!(&payload, "{\"nonce\":312,\"result\":\"340175381422106372296624206295814425082\",\"_spook\":null}");
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let payload = gen_pow(100_000, "MFsqLMZId629Dh2hrtux2Qdn3gBzCaSt".into());
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assert_eq!(&payload, "{\"nonce\":59930,\"result\":\"340281433562218714678373578791487113813\",\"_spook\":null}");
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let payload = gen_pow(1_000_000, "MFsqLMZId629Dh2hrtux2Qdn3gBzCaSt".into());
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assert_eq!(&payload,"{\"nonce\":1902451,\"result\":\"340282308726676882310449308394036800665\",\"_spook\":null}");
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}
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}
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