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correct key type and message size for ML-KEM-512
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This commit is contained in:
orignal 2025-04-05 18:12:38 -04:00
parent bce0ccf161
commit 2f2ecc32d2
1 changed files with 23 additions and 8 deletions
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31
libi2pd/ECIESX25519AEADRatchetSession.cpp
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@ -274,22 +274,24 @@ namespace garlic
i2p::crypto::InitNoiseIKStateMLKEM512 (GetNoiseState (), GetOwner ()->GetEncryptionPublicKey (i2p::data::CRYPTO_KEY_TYPE_ECIES_MLKEM512_X25519_AEAD)); // bpk
MixHash (m_Aepk, 32); // h = SHA256(h || aepk)
if (GetOwner ()->Decrypt (m_Aepk, sharedSecret, i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD)) // x25519(bsk, aepk)
if (GetOwner ()->Decrypt (m_Aepk, sharedSecret, i2p::data::CRYPTO_KEY_TYPE_ECIES_MLKEM512_X25519_AEAD)) // x25519(bsk, aepk)
{
MixKey (sharedSecret);
uint8_t nonce[12], encapsKey[i2p::crypto::MLKEM512_KEY_LENGTH];
CreateNonce (n, nonce);
if (i2p::crypto::AEADChaCha20Poly1305 (buf, i2p::crypto::MLKEM512_KEY_LENGTH,
m_H, 32, m_CK + 32, nonce, encapsKey, i2p::crypto::MLKEM512_KEY_LENGTH , false)) // decrypt
m_H, 32, m_CK + 32, nonce, encapsKey, i2p::crypto::MLKEM512_KEY_LENGTH, false)) // decrypt
{
decrypted = true; // encaps section has right hash
MixHash (buf, i2p::crypto::MLKEM512_KEY_LENGTH);
MixHash (buf, i2p::crypto::MLKEM512_KEY_LENGTH + 16);
buf += i2p::crypto::MLKEM512_KEY_LENGTH + 16;
len -= i2p::crypto::MLKEM512_KEY_LENGTH + 16;
n++;
m_PQKeys = std::make_unique<i2p::crypto::MLKEM512Keys>();
m_PQKeys->SetPublicKey (encapsKey);
}
}
}
}
#endif
@ -579,7 +581,7 @@ namespace garlic
CreateNonce (n, nonce);
const uint8_t * fs;
if (isStatic)
fs = GetOwner ()->GetEncryptionPublicKey (i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD);
fs = GetOwner ()->GetEncryptionPublicKey (m_RemoteStaticKeyType);
else
{
memset (out + offset, 0, 32); // all zeros flags section
@ -596,7 +598,7 @@ namespace garlic
// KDF2
if (isStatic)
{
GetOwner ()->Decrypt (m_RemoteStaticKey, sharedSecret, i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD); // x25519 (ask, bpk)
GetOwner ()->Decrypt (m_RemoteStaticKey, sharedSecret, m_RemoteStaticKeyType); // x25519 (ask, bpk)
MixKey (sharedSecret);
}
else
@ -665,7 +667,7 @@ namespace garlic
{
uint8_t kemCiphertext[i2p::crypto::MLKEM512_CIPHER_TEXT_LENGTH];
m_PQKeys->Encaps (kemCiphertext, sharedSecret);
if (!i2p::crypto::AEADChaCha20Poly1305 (kemCiphertext, i2p::crypto::MLKEM512_CIPHER_TEXT_LENGTH,
m_H, 32, m_CK + 32, nonce, out + offset, i2p::crypto::MLKEM512_CIPHER_TEXT_LENGTH + 16, true)) // encrypt
{
@ -761,7 +763,7 @@ namespace garlic
return false;
}
MixKey (sharedSecret);
GetOwner ()->Decrypt (bepk, sharedSecret, i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD); // x25519 (ask, bepk)
GetOwner ()->Decrypt (bepk, sharedSecret, m_RemoteStaticKeyType); // x25519 (ask, bepk)
MixKey (sharedSecret);
uint8_t nonce[12];
@ -779,6 +781,7 @@ namespace garlic
}
MixHash (buf, i2p::crypto::MLKEM512_CIPHER_TEXT_LENGTH + 16);
buf += i2p::crypto::MLKEM512_CIPHER_TEXT_LENGTH + 16;
len -= i2p::crypto::MLKEM512_CIPHER_TEXT_LENGTH + 16;
// decaps
m_PQKeys->Decaps (kemCiphertext, sharedSecret);
MixKey (sharedSecret);
@ -945,7 +948,11 @@ namespace garlic
if (!payload) return nullptr;
size_t len = CreatePayload (msg, m_State != eSessionStateEstablished, payload);
if (!len) return nullptr;
#if OPENSSL_PQ
auto m = NewI2NPMessage (len + (m_State == eSessionStateEstablished ? 28 : i2p::crypto::MLKEM512_KEY_LENGTH + 116));
#else
auto m = NewI2NPMessage (len + 100); // 96 + 4
#endif
m->Align (12); // in order to get buf aligned to 16 (12 + 4)
uint8_t * buf = m->GetPayload () + 4; // 4 bytes for length
@ -960,11 +967,19 @@ namespace garlic
if (!NewOutgoingSessionMessage (payload, len, buf, m->maxLen))
return nullptr;
len += 96;
#if OPENSSL_PQ
if (m_RemoteStaticKeyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_MLKEM512_X25519_AEAD)
len += i2p::crypto::MLKEM512_KEY_LENGTH + 16;
#endif
break;
case eSessionStateNewSessionReceived:
if (!NewSessionReplyMessage (payload, len, buf, m->maxLen))
return nullptr;
len += 72;
#if OPENSSL_PQ
if (m_RemoteStaticKeyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_MLKEM512_X25519_AEAD)
len += i2p::crypto::MLKEM512_CIPHER_TEXT_LENGTH + 16;
#endif
break;
case eSessionStateNewSessionReplySent:
if (!NextNewSessionReplyMessage (payload, len, buf, m->maxLen))