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+default = ["aes_siv", "ed25519"] +aes_siv = [] +ed25519 = [] diff --git a/rust/ares_crypto/src/aes_siv.rs b/rust/ares_crypto/src/aes_siv.rs new file mode 100644 index 0000000..5aa0639 --- /dev/null +++ b/rust/ares_crypto/src/aes_siv.rs @@ -0,0 +1,54 @@ +use aes_siv::{ + aead::{heapless::Vec, AeadInPlace, Error, KeyInit}, + Aes256SivAead, + Nonce, // Or `Aes128SivAead` +}; + +pub fn _ac_aes_siv_en() -> Result<(), Error> { + todo!(); + // let key = Aes256SivAead::generate_key(&mut OsRng); + // let cipher = Aes256SivAead::new(&key); + // let nonce = Nonce::from_slice(b"any unique nonce"); // 128-bits; unique per message + + // let mut buffer: Vec = Vec::new(); // Note: buffer needs 16-bytes overhead for auth tag tag + // buffer.extend_from_slice(b"plaintext message"); + + // // Encrypt `buffer` in-place, replacing the plaintext contents with ciphertext + // cipher.encrypt_in_place(nonce, b"", &mut buffer)?; + + // // `buffer` now contains the message ciphertext + // assert_ne!(&buffer, b"plaintext message"); + + // // Decrypt `buffer` in-place, replacing its ciphertext context with the original plaintext + // cipher.decrypt_in_place(nonce, b"", &mut buffer)?; + // assert_eq!(&buffer, b"plaintext message"); + // Ok(()) +} + +pub fn _ac_aes_siv_de() -> Result<(), Error> { + todo!(); +} + +pub fn ac_aes_siva_en() -> Result<(), Error> { + todo!(); +} + +pub fn ac_aes_siva_de() -> Result<(), Error> { + todo!(); +} + +pub fn ac_aes_sivb_en() -> Result<(), Error> { + todo!(); +} + +pub fn ac_aes_sivb_de() -> Result<(), Error> { + todo!(); +} + +pub fn ac_aes_sivc_en() -> Result<(), Error> { + todo!(); +} + +pub fn ac_aes_sivc_de() -> Result<(), Error> { + todo!(); +} diff --git a/rust/ares_crypto/src/ed25519.rs b/rust/ares_crypto/src/ed25519.rs new file mode 100644 index 0000000..aa4f940 --- /dev/null +++ b/rust/ares_crypto/src/ed25519.rs @@ -0,0 +1,32 @@ +use std::ptr::copy_nonoverlapping; + +use ed25519_dalek::{SignatureError, SigningKey}; +use rand::{rngs::StdRng, SeedableRng}; + +/// Generate a public key from the given seed and write it to the given 32-byte output buffer, +pub fn ac_ed_puck(seed: &mut [u8; 32], out: *mut u8) -> Result<(), SignatureError> { + let mut csprng = StdRng::from_seed(*seed); + let signing_key = SigningKey::generate(&mut csprng); + let verifying_key = signing_key.verifying_key(); + unsafe { + copy_nonoverlapping(verifying_key.as_bytes().as_ptr(), out, 32); + } + Ok(()) +} + +/// Perform a key exchange between the given public key and the keypair generated from the given seed, +/// writing the resulting shared key to the given 32-byte output buffer. +pub fn ac_ed_shar(public: &[u8; 32], seed: &[u8; 32], out: *mut u8) -> Result<(), SignatureError> { + // Generate a keypair from the given seed. + let mut csprng = StdRng::from_seed(*seed); + let self_key = SigningKey::generate(&mut csprng); + + let mut keypair_bytes = [0u8; 64]; + keypair_bytes[..32].copy_from_slice(&self_key.to_bytes()); + keypair_bytes[32..].copy_from_slice(public); + let shared_key = SigningKey::from_keypair_bytes(&keypair_bytes)?; + unsafe { + copy_nonoverlapping(shared_key.to_bytes().as_ptr(), out, 32); + } + Ok(()) +} diff --git a/rust/ares_crypto/src/lib.rs b/rust/ares_crypto/src/lib.rs new file mode 100644 index 0000000..7a5d496 --- /dev/null +++ b/rust/ares_crypto/src/lib.rs @@ -0,0 +1,5 @@ +#[cfg(feature = "aes_siv")] +pub mod aes_siv; + +#[cfg(feature = "ed25519")] +pub mod ed25519;