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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use serde::Deserialize;
use std::ffi::c_void;
use std::fs::File;
use std::io::Cursor;
use thin_vec::ThinVec;
use dap_ffi::types::Report;
use prio::codec::{Decode, Encode};
#[no_mangle]
pub extern "C" fn dap_test_encoding() {
let r = Report::new_dummy();
let mut encoded = Vec::<u8>::new();
Report::encode(&r, &mut encoded);
let decoded = Report::decode(&mut Cursor::new(&encoded)).expect("Report decoding failed!");
if r != decoded {
println!("Report:");
println!("{:?}", r);
println!("Encoded Report:");
println!("{:?}", encoded);
println!("Decoded Report:");
println!("{:?}", decoded);
panic!("Report changed after encoding & decoding.");
}
}
extern "C" {
pub fn dapHpkeEncrypt(
aContext: *mut c_void,
aAad: *mut u8,
aAadLength: u32,
aPlaintext: *mut u8,
aPlaintextLength: u32,
aOutputShare: &mut ThinVec<u8>,
) -> bool;
pub fn dapSetupHpkeContextForTesting(
aKey: *const u8,
aKeyLength: u32,
aInfo: *mut u8,
aInfoLength: u32,
aPkEm: *const u8,
aPkEmLength: u32,
aSkEm: *const u8,
aSkEmLength: u32,
aOutputEncapsulatedKey: &mut ThinVec<u8>,
) -> *mut c_void;
pub fn dapDestroyHpkeContext(aContext: *mut c_void);
}
struct HpkeContext(*mut c_void);
impl Drop for HpkeContext {
fn drop(&mut self) {
unsafe {
dapDestroyHpkeContext(self.0);
}
}
}
type Testsuites = Vec<CiphersuiteTest>;
#[derive(Debug, Deserialize)]
pub struct HexString(#[serde(with = "hex")] Vec<u8>);
impl AsRef<[u8]> for HexString {
fn as_ref(&self) -> &[u8] {
&self.0
}
}
#[allow(dead_code)]
#[derive(Debug, Deserialize)]
struct CiphersuiteTest {
mode: i64,
kem_id: i64,
kdf_id: i64,
aead_id: i64,
info: HexString,
#[serde(rename = "ikmR")]
ikm_r: HexString,
#[serde(rename = "ikmE")]
ikm_e: HexString,
#[serde(rename = "skRm")]
sk_r_m: HexString,
#[serde(rename = "skEm")]
sk_e_m: HexString,
#[serde(rename = "pkRm")]
pk_r_m: HexString,
#[serde(rename = "pkEm")]
pk_e_m: HexString,
enc: HexString,
shared_secret: HexString,
key_schedule_context: HexString,
secret: HexString,
key: HexString,
base_nonce: HexString,
exporter_secret: HexString,
encryptions: Vec<Encryption>,
exports: Vec<Export>,
psk: Option<HexString>,
psk_id: Option<HexString>,
ikm_s: Option<HexString>,
sk_sm: Option<HexString>,
pk_sm: Option<HexString>,
}
#[derive(Debug, Deserialize)]
pub struct Encryption {
pub aad: HexString,
pub ciphertext: HexString,
pub nonce: HexString,
pub plaintext: HexString,
}
#[derive(Debug, Deserialize)]
pub struct Export {
pub exporter_context: HexString,
#[serde(rename = "L")]
pub length: i64,
pub exported_value: HexString,
}
#[no_mangle]
pub extern "C" fn dap_test_hpke_encrypt() {
let file = File::open("hpke-vectors.json").unwrap();
let tests: Testsuites = serde_json::from_reader(file).unwrap();
let mut have_tested = false;
for (test_idx, test) in tests.into_iter().enumerate() {
// Mode must be "Base"
if test.mode != 0
// KEM must be DHKEM(X25519, HKDF-SHA256)
|| test.kem_id != 32
// KDF must be HKDF-SHA256
|| test.kdf_id != 1
// AEAD must be AES-128-GCM
|| test.aead_id != 1
{
continue;
}
have_tested = true;
let mut pk_r_serialized = test.pk_r_m.0;
let mut info = test.info.0;
let mut pk_e_serialized = test.pk_e_m.0;
let mut sk_e_serialized = test.sk_e_m.0;
let mut encapsulated_key = ThinVec::<u8>::new();
let ctx = HpkeContext(unsafe {
dapSetupHpkeContextForTesting(
pk_r_serialized.as_mut_ptr(),
pk_r_serialized.len().try_into().unwrap(),
info.as_mut_ptr(),
info.len().try_into().unwrap(),
pk_e_serialized.as_mut_ptr(),
pk_e_serialized.len().try_into().unwrap(),
sk_e_serialized.as_mut_ptr(),
sk_e_serialized.len().try_into().unwrap(),
&mut encapsulated_key,
)
});
if ctx.0.is_null() {
panic!("Failed to set up HPKE context.");
}
if encapsulated_key != test.enc.0 {
panic!("Encapsulated key is wrong!");
}
for (encryption_idx, encryption) in test.encryptions.into_iter().enumerate() {
let mut encrypted_share = ThinVec::<u8>::new();
let mut aad = encryption.aad.0.clone();
let mut pt = encryption.plaintext.0.clone();
unsafe {
dapHpkeEncrypt(
ctx.0,
aad.as_mut_ptr(),
aad.len().try_into().unwrap(),
pt.as_mut_ptr(),
pt.len().try_into().unwrap(),
&mut encrypted_share,
);
}
if encrypted_share != encryption.ciphertext.0 {
println!("Test: {}, Encryption: {}", test_idx, encryption_idx);
println!("Expected:");
println!("{:?}", encryption.ciphertext.0);
println!("Actual:");
println!("{:?}", encrypted_share);
panic!("Encryption outputs did not match!");
}
}
}
assert!(have_tested);
}
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