PurpleI2P
/
i2pd
mirror of https://github.com/PurpleI2P/i2pd.git
1
0
Fork 0
Code Issues Releases Activity
Browse Source

common blinding code for public and private keys

pull/1362/head
orignal 6 years ago
parent
828862ea49
commit
686c0b776f
1 changed files with 48 additions and 51 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 89
      libi2pd/Blinding.cpp

89
libi2pd/Blinding.cpp
Unescape View File

@ -52,7 +52,7 @@ namespace data @@ -52,7 +52,7 @@ namespace data
BN_CTX_free (ctx);
}
static void BlindPublicKeyECDSA (size_t publicKeyLen, const EC_GROUP * group, const uint8_t * pub, const uint8_t * seed, uint8_t * blindedPub)
static void BlindEncodedPublicKeyECDSA (size_t publicKeyLen, const EC_GROUP * group, const uint8_t * pub, const uint8_t * seed, uint8_t * blindedPub)
{
BIGNUM * x = BN_bin2bn (pub, publicKeyLen/2, NULL);
BIGNUM * y = BN_bin2bn (pub + publicKeyLen/2, publicKeyLen/2, NULL);
@ -67,7 +67,7 @@ namespace data @@ -67,7 +67,7 @@ namespace data
BN_free (x); BN_free (y);
}
static void BlindPrivateKeyECDSA (size_t publicKeyLen, const EC_GROUP * group, const uint8_t * priv, const uint8_t * seed, uint8_t * blindedPriv, uint8_t * blindedPub)
static void BlindEncodedPrivateKeyECDSA (size_t publicKeyLen, const EC_GROUP * group, const uint8_t * priv, const uint8_t * seed, uint8_t * blindedPriv, uint8_t * blindedPub)
{
BIGNUM * a = BN_bin2bn (priv, publicKeyLen/2, NULL);
BIGNUM * a1 = BN_new ();
@ -87,6 +87,44 @@ namespace data @@ -87,6 +87,44 @@ namespace data
BN_free (x); BN_free (y);
}
template<typename Fn, typename...Args>
static size_t BlindECDSA (i2p::data::SigningKeyType sigType, const uint8_t * key, const uint8_t * seed, Fn blind, Args&&...args)
// blind is BlindEncodedPublicKeyECDSA or BlindEncodedPrivateKeyECDSA
{
size_t publicKeyLength = 0;
EC_GROUP * group = nullptr;
switch (sigType)
{
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
{
publicKeyLength = i2p::crypto::ECDSAP256_KEY_LENGTH;
group = EC_GROUP_new_by_curve_name (NID_X9_62_prime256v1);
break;
}
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
{
publicKeyLength = i2p::crypto::ECDSAP384_KEY_LENGTH;
group = EC_GROUP_new_by_curve_name (NID_secp384r1);
break;
}
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
{
publicKeyLength = i2p::crypto::ECDSAP521_KEY_LENGTH;
group = EC_GROUP_new_by_curve_name (NID_secp521r1);
break;
}
default:
LogPrint (eLogError, "Blinding: signature type ", (int)sigType, " is not ECDSA");
}
if (group)
{
blind (publicKeyLength, group, key, seed, std::forward<Args>(args)...);
EC_GROUP_free (group);
}
return publicKeyLength;
}
BlindedPublicKey::BlindedPublicKey (std::shared_ptr<const IdentityEx> identity)
{
if (!identity) return;
@ -179,40 +217,20 @@ namespace data @@ -179,40 +217,20 @@ namespace data
{
uint8_t seed[64];
GenerateAlpha (date, seed);
size_t publicKeyLength = 0;
switch (m_SigType)
{
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
{
publicKeyLength = i2p::crypto::ECDSAP256_KEY_LENGTH;
EC_GROUP * group = EC_GROUP_new_by_curve_name (NID_X9_62_prime256v1);
BlindPublicKeyECDSA (publicKeyLength, group, GetPublicKey (), seed, blindedKey);
EC_GROUP_free (group);
break;
}
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
{
publicKeyLength = i2p::crypto::ECDSAP384_KEY_LENGTH;
EC_GROUP * group = EC_GROUP_new_by_curve_name (NID_secp384r1);
BlindPublicKeyECDSA (publicKeyLength, group, GetPublicKey (), seed, blindedKey);
EC_GROUP_free (group);
break;
}
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
{
publicKeyLength = i2p::crypto::ECDSAP521_KEY_LENGTH;
EC_GROUP * group = EC_GROUP_new_by_curve_name (NID_secp521r1);
BlindPublicKeyECDSA (publicKeyLength, group, GetPublicKey (), seed, blindedKey);
EC_GROUP_free (group);
publicKeyLength = BlindECDSA (m_SigType, GetPublicKey (), seed, BlindEncodedPublicKeyECDSA, blindedKey);
break;
}
case i2p::data::SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519:
case i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
{
i2p::crypto::GetEd25519 ()->BlindPublicKey (GetPublicKey (), seed, blindedKey);
publicKeyLength = i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH;
break;
}
default:
LogPrint (eLogError, "Blinding: can't blind signature type ", (int)m_SigType);
}
@ -227,35 +245,14 @@ namespace data @@ -227,35 +245,14 @@ namespace data
switch (m_SigType)
{
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
{
publicKeyLength = i2p::crypto::ECDSAP256_KEY_LENGTH;
EC_GROUP * group = EC_GROUP_new_by_curve_name (NID_X9_62_prime256v1);
BlindPrivateKeyECDSA (publicKeyLength, group, priv, seed, blindedPriv, blindedPub);
EC_GROUP_free (group);
break;
}
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
{
publicKeyLength = i2p::crypto::ECDSAP384_KEY_LENGTH;
EC_GROUP * group = EC_GROUP_new_by_curve_name (NID_secp384r1);
BlindPrivateKeyECDSA (publicKeyLength, group, priv, seed, blindedPriv, blindedPub);
EC_GROUP_free (group);
break;
}
case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
{
publicKeyLength = i2p::crypto::ECDSAP521_KEY_LENGTH;
EC_GROUP * group = EC_GROUP_new_by_curve_name (NID_secp521r1);
BlindPrivateKeyECDSA (publicKeyLength, group, priv, seed, blindedPriv, blindedPub);
EC_GROUP_free (group);
publicKeyLength = BlindECDSA (m_SigType, GetPublicKey (), seed, BlindEncodedPrivateKeyECDSA, blindedPriv, blindedPub);
break;
}
case i2p::data::SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519:
{
i2p::crypto::GetEd25519 ()->BlindPrivateKey (priv, seed, blindedPriv, blindedPub);
publicKeyLength = i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH;
break;
}
default:
LogPrint (eLogError, "Blinding: can't blind signature type ", (int)m_SigType);
}

Write Preview
Loading…
Cancel
Save