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Code Issues Releases Activity

32 bytes private key for ECIESx25519

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orignal 2020-10-29 18:41:21 -04:00
parent b9b431e82d
commit b12fa97a38
2 changed files with 15 additions and 6 deletions
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20
libi2pd/Identity.cpp
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@ -476,7 +476,7 @@ namespace data
size_t PrivateKeys::GetFullLen () const
{
size_t ret = m_Public->GetFullLen () + 256 + m_Public->GetSigningPrivateKeyLen ();
size_t ret = m_Public->GetFullLen () + GetPrivateKeyLen () + m_Public->GetSigningPrivateKeyLen ();
if (IsOfflineSignature ())
ret += m_OfflineSignature.size () + m_TransientSigningPrivateKeyLen;
return ret;
@ -486,9 +486,10 @@ namespace data
{
m_Public = std::make_shared<IdentityEx>();
size_t ret = m_Public->FromBuffer (buf, len);
if (!ret || ret + 256 > len) return 0; // overflow
memcpy (m_PrivateKey, buf + ret, 256); // private key always 256
ret += 256;
auto cryptoKeyLen = GetPrivateKeyLen ();
if (!ret || ret + cryptoKeyLen > len) return 0; // overflow
memcpy (m_PrivateKey, buf + ret, cryptoKeyLen);
ret += cryptoKeyLen;
size_t signingPrivateKeySize = m_Public->GetSigningPrivateKeyLen ();
if(signingPrivateKeySize + ret > len || signingPrivateKeySize > 128) return 0; // overflow
memcpy (m_SigningPrivateKey, buf + ret, signingPrivateKeySize);
@ -540,8 +541,9 @@ namespace data
size_t PrivateKeys::ToBuffer (uint8_t * buf, size_t len) const
{
size_t ret = m_Public->ToBuffer (buf, len);
memcpy (buf + ret, m_PrivateKey, 256); // private key always 256
ret += 256;
auto cryptoKeyLen = GetPrivateKeyLen ();
memcpy (buf + ret, m_PrivateKey, cryptoKeyLen);
ret += cryptoKeyLen;
size_t signingPrivateKeySize = m_Public->GetSigningPrivateKeyLen ();
if(ret + signingPrivateKeySize > len) return 0; // overflow
if (IsOfflineSignature ())
@ -657,6 +659,12 @@ namespace data
return IsOfflineSignature () ? m_TransientSignatureLen : m_Public->GetSignatureLen ();
}
size_t PrivateKeys::GetPrivateKeyLen () const
{
// private key length always 256, but type 4
return (m_Public->GetCryptoKeyType () == CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET) ? 32 : 256;
}
uint8_t * PrivateKeys::GetPadding()
{
if(m_Public->GetSigningKeyType () == SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519)

1
libi2pd/Identity.h
View File

@ -183,6 +183,7 @@ namespace data
void CreateSigner () const;
void CreateSigner (SigningKeyType keyType) const;
size_t GetPrivateKeyLen () const;
private: