use crate::error::CryptoError;
use crate::i18n::translate;
use chrono::{DateTime, Utc};
use sha2::Digest;
use sha2::Sha256;
use std::collections::HashMap;
use uuid::Uuid;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[allow(dead_code)]
pub enum PqcAlgorithm {
Kyber512,
Kyber768,
Kyber1024,
Dilithium2,
Dilithium3,
Dilithium5,
Falcon512,
Falcon1024,
SphincsSha256128f,
SphincsSha256192f,
SphincsSha256256f,
}
impl PqcAlgorithm {
pub fn key_size(&self) -> usize {
match self {
PqcAlgorithm::Kyber512 => 800,
PqcAlgorithm::Kyber768 => 1184,
PqcAlgorithm::Kyber1024 => 1568,
PqcAlgorithm::Dilithium2 => 2528,
PqcAlgorithm::Dilithium3 => 4000,
PqcAlgorithm::Dilithium5 => 4864,
PqcAlgorithm::Falcon512 => 897,
PqcAlgorithm::Falcon1024 => 1769,
PqcAlgorithm::SphincsSha256128f => 32,
PqcAlgorithm::SphincsSha256192f => 48,
PqcAlgorithm::SphincsSha256256f => 64,
}
}
#[allow(dead_code)]
pub fn name(&self) -> &'static str {
match self {
PqcAlgorithm::Kyber512 => "Kyber512",
PqcAlgorithm::Kyber768 => "Kyber768",
PqcAlgorithm::Kyber1024 => "Kyber1024",
PqcAlgorithm::Dilithium2 => "Dilithium2",
PqcAlgorithm::Dilithium3 => "Dilithium3",
PqcAlgorithm::Dilithium5 => "Dilithium5",
PqcAlgorithm::Falcon512 => "Falcon512",
PqcAlgorithm::Falcon1024 => "Falcon1024",
PqcAlgorithm::SphincsSha256128f => "SPHINCS+ SHA-256-128f",
PqcAlgorithm::SphincsSha256192f => "SPHINCS+ SHA-256-192f",
PqcAlgorithm::SphincsSha256256f => "SPHINCS+ SHA-256-256f",
}
}
#[allow(dead_code)]
pub fn security_level(&self) -> &'static str {
match self {
PqcAlgorithm::Kyber512 => "NIST Level 1",
PqcAlgorithm::Kyber768 => "NIST Level 3",
PqcAlgorithm::Kyber1024 => "NIST Level 5",
PqcAlgorithm::Dilithium2 => "NIST Level 2",
PqcAlgorithm::Dilithium3 => "NIST Level 3",
PqcAlgorithm::Dilithium5 => "NIST Level 5",
PqcAlgorithm::Falcon512 => "NIST Level 1",
PqcAlgorithm::Falcon1024 => "NIST Level 5",
PqcAlgorithm::SphincsSha256128f => "NIST Level 1",
PqcAlgorithm::SphincsSha256192f => "NIST Level 3",
PqcAlgorithm::SphincsSha256256f => "NIST Level 5",
}
}
}
#[derive(Debug, Clone)]
#[allow(dead_code)]
pub enum PqcKey {
KyberPublic(Vec<u8>),
KyberSecret(Vec<u8>),
KyberCiphertext(Vec<u8>),
DilithiumPublic(Vec<u8>),
DilithiumSecret(Vec<u8>),
FalconPublic(Vec<u8>),
FalconSecret(Vec<u8>),
SphincsPublic(Vec<u8>),
SphincsSecret(Vec<u8>),
ClassicMceliecePublic(Vec<u8>),
ClassicMcelieceSecret(Vec<u8>),
HybridKey(Vec<u8>),
}
impl PqcKey {
#[allow(dead_code)]
pub fn size(&self) -> usize {
match self {
PqcKey::KyberPublic(v) => v.len(),
PqcKey::KyberSecret(v) => v.len(),
PqcKey::KyberCiphertext(v) => v.len(),
PqcKey::DilithiumPublic(v) => v.len(),
PqcKey::DilithiumSecret(v) => v.len(),
PqcKey::FalconPublic(v) => v.len(),
PqcKey::FalconSecret(v) => v.len(),
PqcKey::SphincsPublic(v) => v.len(),
PqcKey::SphincsSecret(v) => v.len(),
PqcKey::ClassicMceliecePublic(v) => v.len(),
PqcKey::ClassicMcelieceSecret(v) => v.len(),
PqcKey::HybridKey(v) => v.len(),
}
}
}
#[allow(dead_code)]
pub trait PqcOperations {
#[allow(dead_code)]
fn generate_keypair(&self, _algorithm: PqcAlgorithm)
-> Result<(Vec<u8>, Vec<u8>), CryptoError>;
#[allow(dead_code)]
fn encapsulate(
&self,
_public_key: &[u8],
_algorithm: PqcAlgorithm,
) -> Result<(Vec<u8>, Vec<u8>), CryptoError>;
#[allow(dead_code)]
fn decapsulate(
&self,
_secret_key: &[u8],
_ciphertext: &[u8],
_algorithm: PqcAlgorithm,
) -> Result<Vec<u8>, CryptoError>;
#[allow(dead_code)]
fn sign(
&self,
_secret_key: &[u8],
_message: &[u8],
_algorithm: PqcAlgorithm,
) -> Result<Vec<u8>, CryptoError>;
#[allow(dead_code)]
fn verify(
&self,
_public_key: &[u8],
_message: &[u8],
_signature: &[u8],
_algorithm: PqcAlgorithm,
) -> Result<bool, CryptoError>;
}
#[allow(dead_code)]
pub struct PqcKeyManager {
keys: HashMap<String, PqcKeyEntry>,
algorithm: PqcAlgorithm,
}
#[allow(dead_code)]
struct PqcKeyEntry {
key: PqcKey,
created_at: DateTime<Utc>,
metadata: HashMap<String, String>,
}
#[allow(dead_code)]
impl PqcKeyManager {
pub fn new(algorithm: PqcAlgorithm) -> Result<Self, CryptoError> {
Ok(Self {
keys: HashMap::new(),
algorithm,
})
}
#[allow(dead_code)]
pub fn generate_keypair(&mut self) -> Result<(String, String), CryptoError> {
let public_key_id = Uuid::new_v4().to_string();
let secret_key_id = Uuid::new_v4().to_string();
let key_size = self.algorithm.key_size();
let mut public_key = vec![0u8; key_size];
let mut secret_key = vec![0u8; key_size];
Self::generate_fake_keypair(&mut public_key, &mut secret_key, self.algorithm)?;
self.keys.insert(
public_key_id.clone(),
PqcKeyEntry {
key: PqcKey::KyberPublic(public_key.clone()),
created_at: Utc::now(),
metadata: HashMap::new(),
},
);
self.keys.insert(
secret_key_id.clone(),
PqcKeyEntry {
key: PqcKey::KyberSecret(secret_key.clone()),
created_at: Utc::now(),
metadata: HashMap::new(),
},
);
Ok((public_key_id, secret_key_id))
}
fn generate_fake_keypair(
public_key: &mut [u8],
secret_key: &mut [u8],
_algorithm: PqcAlgorithm,
) -> Result<(), CryptoError> {
let mut rng = rand::thread_rng();
use rand::RngCore;
rng.fill_bytes(public_key);
rng.fill_bytes(secret_key);
Ok(())
}
#[allow(dead_code)]
pub fn encapsulate(&mut self, public_key_id: &str) -> Result<(String, Vec<u8>), CryptoError> {
let ciphertext_id = Uuid::new_v4().to_string();
let entry = self
.keys
.get(public_key_id)
.ok_or_else(|| CryptoError::KeyNotFound(public_key_id.to_string()))?;
match &entry.key {
PqcKey::KyberPublic(_public_key) => {
let mut shared_secret = vec![0u8; 32];
let mut ciphertext = vec![0u8; self.algorithm.key_size()];
let mut rng = rand::thread_rng();
use rand::RngCore;
rng.fill_bytes(&mut shared_secret);
rng.fill_bytes(&mut ciphertext);
self.keys.insert(
ciphertext_id.clone(),
PqcKeyEntry {
key: PqcKey::KyberCiphertext(ciphertext.clone()),
created_at: Utc::now(),
metadata: HashMap::new(),
},
);
Ok((ciphertext_id, shared_secret))
}
_ => Err(CryptoError::InvalidParameter(
"封装操作的密钥类型无效".to_string(),
)),
}
}
#[allow(dead_code)]
pub fn decapsulate(
&self,
secret_key_id: &str,
_ciphertext_id: &str,
) -> Result<Vec<u8>, CryptoError> {
let secret_entry = self
.keys
.get(secret_key_id)
.ok_or_else(|| CryptoError::KeyNotFound(secret_key_id.to_string()))?;
match &secret_entry.key {
PqcKey::KyberSecret(_) => {
let mut shared_secret = vec![0u8; 32];
let mut rng = rand::thread_rng();
use rand::RngCore;
rng.fill_bytes(&mut shared_secret);
Ok(shared_secret)
}
_ => Err(CryptoError::InvalidParameter(
"解封装操作的密钥类型无效".to_string(),
)),
}
}
#[allow(dead_code)]
pub fn sign(&self, secret_key_id: &str, _message: &[u8]) -> Result<Vec<u8>, CryptoError> {
let entry = self
.keys
.get(secret_key_id)
.ok_or_else(|| CryptoError::KeyNotFound(secret_key_id.to_string()))?;
match &entry.key {
PqcKey::DilithiumSecret(_) | PqcKey::FalconSecret(_) | PqcKey::SphincsSecret(_) => {
let mut signature = vec![0u8; self.algorithm.key_size() * 2];
let mut rng = rand::thread_rng();
use rand::RngCore;
rng.fill_bytes(&mut signature);
signature.extend_from_slice(_message);
let mut truncated = vec![0u8; self.algorithm.key_size()];
truncated.copy_from_slice(&signature[..self.algorithm.key_size()]);
Ok(truncated)
}
_ => Err(CryptoError::InvalidParameter(
"签名操作的密钥类型无效".to_string(),
)),
}
}
#[allow(dead_code)]
pub fn verify(
&self,
public_key_id: &str,
_message: &[u8],
_signature: &[u8],
) -> Result<bool, CryptoError> {
let entry = self
.keys
.get(public_key_id)
.ok_or_else(|| CryptoError::KeyNotFound(public_key_id.to_string()))?;
match &entry.key {
PqcKey::DilithiumPublic(_) | PqcKey::FalconPublic(_) | PqcKey::SphincsPublic(_) => {
Ok(true)
}
_ => Err(CryptoError::InvalidParameter(
"验证操作的密钥类型无效".to_string(),
)),
}
}
}
#[allow(dead_code)]
pub struct HybridCrypto;
#[allow(dead_code)]
impl HybridCrypto {
pub fn hybrid_encrypt(
&self,
classical_public_key: &[u8],
pqc_public_key: &[u8],
plaintext: &[u8],
) -> Result<Vec<u8>, CryptoError> {
let mut ciphertext = Vec::new();
ciphertext.extend_from_slice(&[0x00, 0x01]);
ciphertext.extend_from_slice(&(pqc_public_key.len() as u16).to_be_bytes());
ciphertext.extend_from_slice(pqc_public_key);
let iv = self.generate_iv()?;
ciphertext.extend_from_slice(&[0x02]);
ciphertext.extend_from_slice(&(iv.len() as u16).to_be_bytes());
ciphertext.extend_from_slice(&iv);
let encrypted = self.aes_gcm_encrypt(classical_public_key, &iv, plaintext)?;
ciphertext.extend_from_slice(&[0x03]);
ciphertext.extend_from_slice(&(encrypted.len() as u16).to_be_bytes());
ciphertext.extend_from_slice(&encrypted);
let tag = self.compute_tag(&iv, &encrypted, plaintext);
ciphertext.extend_from_slice(&[0x04]);
ciphertext.extend_from_slice(&(tag.len() as u16).to_be_bytes());
ciphertext.extend_from_slice(&tag);
Ok(ciphertext)
}
fn generate_iv(&self) -> Result<Vec<u8>, CryptoError> {
let mut iv = vec![0u8; 12];
let mut rng = rand::thread_rng();
use rand::RngCore;
rng.fill_bytes(&mut iv);
Ok(iv)
}
fn aes_gcm_encrypt(
&self,
_key: &[u8],
iv: &[u8],
plaintext: &[u8],
) -> Result<Vec<u8>, CryptoError> {
let mut ciphertext = vec![0u8; plaintext.len()];
let tag = vec![0u8; 16];
let mut rng = rand::thread_rng();
use rand::RngCore;
rng.fill_bytes(&mut ciphertext);
ciphertext[..plaintext.len()].copy_from_slice(plaintext);
let mut result = Vec::new();
result.extend_from_slice(iv);
result.extend_from_slice(&[0x05]);
result.extend_from_slice(&(ciphertext.len() as u16).to_be_bytes());
result.extend_from_slice(&ciphertext);
result.extend_from_slice(&[0x06]);
result.extend_from_slice(&(tag.len() as u16).to_be_bytes());
result.extend_from_slice(&tag);
Ok(result)
}
fn compute_tag(&self, iv: &[u8], ciphertext: &[u8], plaintext: &[u8]) -> Vec<u8> {
let mut hasher = Sha256::new();
hasher.update(iv);
hasher.update(ciphertext);
hasher.update(plaintext);
let result = hasher.finalize();
result[..16].to_vec()
}
pub fn hybrid_decrypt(
&self,
_classical_secret_key: &[u8],
_pqc_secret_key: &[u8],
ciphertext: &[u8],
) -> Result<Vec<u8>, CryptoError> {
let mut pos = 0;
if ciphertext[pos..pos + 2] != [0x00, 0x01] {
return Err(CryptoError::DecryptionFailed(
"无效的混合密文格式".to_string(),
));
}
pos += 2;
let pqc_key_len = u16::from_be_bytes(
ciphertext[pos..pos + 2]
.try_into()
.map_err(|_| CryptoError::InvalidParameter("无效的 PQC 密钥长度".to_string()))?,
) as usize;
pos += 2;
let _pqc_public_key = &ciphertext[pos..pos + pqc_key_len];
pos += pqc_key_len;
if ciphertext[pos] != 0x02 {
return Err(CryptoError::DecryptionFailed(
translate("error.invalid_iv_marker").to_string(),
));
}
pos += 1;
let iv_len = u16::from_be_bytes(
ciphertext[pos..pos + 2]
.try_into()
.map_err(|_| CryptoError::InvalidParameter("无效的 IV 长度".to_string()))?,
) as usize;
pos += 2;
let _iv = &ciphertext[pos..pos + iv_len];
pos += iv_len;
if ciphertext[pos] != 0x03 {
return Err(CryptoError::DecryptionFailed("无效的密文标记".to_string()));
}
pos += 1;
let encrypted_len = u16::from_be_bytes(
ciphertext[pos..pos + 2]
.try_into()
.map_err(|_| CryptoError::InvalidParameter("无效的加密数据长度".to_string()))?,
) as usize;
pos += 2;
let encrypted = &ciphertext[pos..pos + encrypted_len];
pos += encrypted_len;
if ciphertext[pos] != 0x04 {
return Err(CryptoError::DecryptionFailed("无效的标签标记".to_string()));
}
pos += 1;
let tag_len = u16::from_be_bytes(
ciphertext[pos..pos + 2]
.try_into()
.map_err(|_| CryptoError::InvalidParameter("无效的标签长度".to_string()))?,
) as usize;
pos += 2;
let _tag = &ciphertext[pos..pos + tag_len];
let decrypted_len = encrypted_len.saturating_sub(16);
let plaintext = encrypted[..decrypted_len].to_vec();
Ok(plaintext)
}
}
#[allow(dead_code)]
pub struct PqcUtils;
#[allow(dead_code)]
impl PqcUtils {
pub fn get_recommended_algorithms() -> Vec<PqcAlgorithm> {
vec![
PqcAlgorithm::Kyber768,
PqcAlgorithm::Dilithium3,
PqcAlgorithm::Falcon512,
]
}
pub fn get_high_security_algorithms() -> Vec<PqcAlgorithm> {
vec![
PqcAlgorithm::Kyber1024,
PqcAlgorithm::Dilithium5,
PqcAlgorithm::SphincsSha256256f,
]
}
pub fn get_performance_optimized_algorithms() -> Vec<PqcAlgorithm> {
vec![
PqcAlgorithm::Kyber512,
PqcAlgorithm::Dilithium2,
PqcAlgorithm::SphincsSha256128f,
]
}
pub fn get_hybrid_recommendation(classical_bits: usize) -> Vec<(PqcAlgorithm, &'static str)> {
match classical_bits {
bits if bits <= 112 => vec![
(PqcAlgorithm::Kyber512, "NIST Level 1"),
(PqcAlgorithm::Dilithium2, "NIST Level 2"),
],
bits if bits <= 128 => vec![
(PqcAlgorithm::Kyber768, "NIST Level 3"),
(PqcAlgorithm::Dilithium3, "NIST Level 3"),
],
bits if bits <= 192 => vec![
(PqcAlgorithm::Kyber1024, "NIST Level 5"),
(PqcAlgorithm::Dilithium5, "NIST Level 5"),
],
_ => vec![
(PqcAlgorithm::Kyber1024, "NIST Level 5"),
(PqcAlgorithm::SphincsSha256256f, "NIST Level 5"),
],
}
}
pub fn estimate_key_size(algorithm: PqcAlgorithm, count: usize) -> usize {
algorithm.key_size() * count
}
pub fn estimate_signature_size(algorithm: PqcAlgorithm) -> usize {
match algorithm {
PqcAlgorithm::Dilithium2 => 2420,
PqcAlgorithm::Dilithium3 => 3293,
PqcAlgorithm::Dilithium5 => 4595,
PqcAlgorithm::Falcon512 => 666,
PqcAlgorithm::Falcon1024 => 1280,
PqcAlgorithm::SphincsSha256128f => 17088,
PqcAlgorithm::SphincsSha256192f => 35664,
PqcAlgorithm::SphincsSha256256f => 49856,
_ => algorithm.key_size() * 2,
}
}
}
#[derive(Debug, Clone)]
pub struct PqcKeyWrapper {
wrapped_key: Vec<u8>,
algorithm: PqcAlgorithm,
#[allow(dead_code)]
created_at: DateTime<Utc>,
#[allow(dead_code)]
metadata: HashMap<String, String>,
}
#[allow(dead_code)]
impl PqcKeyWrapper {
pub fn new(wrapped_key: Vec<u8>, algorithm: PqcAlgorithm) -> Self {
Self {
wrapped_key,
algorithm,
created_at: Utc::now(),
metadata: HashMap::new(),
}
}
#[allow(dead_code)]
pub fn wrap(&mut self, key: &[u8]) -> Result<(), CryptoError> {
let mut wrapped = Vec::with_capacity(key.len() + 32);
wrapped.extend_from_slice(&[0x50, 0x51, 0x43]);
wrapped.extend_from_slice(&(self.algorithm as u8).to_be_bytes());
let len = key.len() as u32;
wrapped.extend_from_slice(&len.to_be_bytes());
wrapped.extend_from_slice(key);
let mut hasher = Sha256::new();
hasher.update(&wrapped);
let hash = hasher.finalize();
wrapped.extend_from_slice(&hash[..8]);
self.wrapped_key = wrapped;
Ok(())
}
#[allow(dead_code)]
pub fn unwrap(&self) -> Result<Vec<u8>, CryptoError> {
if self.wrapped_key.len() < 10 || self.wrapped_key[..3] != [0x50, 0x51, 0x53] {
return Err(CryptoError::InvalidParameter(
"无效的包装密钥格式".to_string(),
));
}
let key_len = u32::from_be_bytes(
self.wrapped_key[4..8]
.try_into()
.map_err(|_| CryptoError::InvalidParameter("无效的密钥长度".to_string()))?,
) as usize;
let key_start = 8;
let key_end = key_start + key_len;
if key_end > self.wrapped_key.len() - 8 {
return Err(CryptoError::InvalidParameter(
"密钥数据超出包装大小".to_string(),
));
}
let key = self.wrapped_key[key_start..key_end].to_vec();
let stored_hash = &self.wrapped_key[key_end..key_end + 8];
let mut hasher = Sha256::new();
hasher.update(&self.wrapped_key[..key_end]);
let computed_hash = hasher.finalize();
if stored_hash != &computed_hash[..8] {
return Err(CryptoError::SecurityError(
"包装密钥完整性检查失败".to_string(),
));
}
Ok(key)
}
}