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use crate::{SoftwareVault, VaultEntry, VaultError};
use arrayref::array_ref;
use ockam_core::Result;
use ockam_core::{async_trait, compat::boxed::Box};
use ockam_vault_core::Buffer;
use ockam_vault_core::{
AsymmetricVault, PublicKey, Secret, SecretAttributes, SecretPersistence, SecretType,
SecretVault, CURVE25519_PUBLIC_LENGTH, CURVE25519_SECRET_LENGTH,
};
impl SoftwareVault {
fn ecdh_internal(vault_entry: &VaultEntry, peer_public_key: &PublicKey) -> Result<Buffer<u8>> {
let key = vault_entry.key();
match vault_entry.key_attributes().stype() {
SecretType::Curve25519 => {
if peer_public_key.as_ref().len() != CURVE25519_PUBLIC_LENGTH
|| key.as_ref().len() != CURVE25519_SECRET_LENGTH
{
return Err(VaultError::UnknownEcdhKeyType.into());
}
let sk = x25519_dalek::StaticSecret::from(*array_ref!(
key.as_ref(),
0,
CURVE25519_SECRET_LENGTH
));
let pk_t = x25519_dalek::PublicKey::from(*array_ref!(
peer_public_key.as_ref(),
0,
CURVE25519_PUBLIC_LENGTH
));
let secret = sk.diffie_hellman(&pk_t);
Ok(secret.as_bytes().to_vec())
}
#[cfg(feature = "bls")]
SecretType::Bls => Err(VaultError::UnknownEcdhKeyType.into()),
SecretType::P256 | SecretType::Buffer | SecretType::Aes => {
Err(VaultError::UnknownEcdhKeyType.into())
}
}
}
}
#[async_trait]
impl AsymmetricVault for SoftwareVault {
async fn ec_diffie_hellman(
&mut self,
context: &Secret,
peer_public_key: &PublicKey,
) -> Result<Secret> {
let entry = self.get_entry(context)?;
let dh = Self::ecdh_internal(entry, peer_public_key)?;
let attributes =
SecretAttributes::new(SecretType::Buffer, SecretPersistence::Ephemeral, dh.len());
self.secret_import(&dh, attributes).await
}
}
#[cfg(test)]
mod tests {
use crate::SoftwareVault;
use ockam_vault_test_attribute::*;
fn new_vault() -> SoftwareVault {
SoftwareVault::default()
}
#[vault_test]
fn ec_diffie_hellman_curve25519() {}
}