Mirrors/i2pd
2
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-01-22 21:37:17 +01:00
Code Issues Actions 6 Packages Projects Releases Wiki Activity

extract b33 address

Browse source
This commit is contained in:
orignal 2019-03-22 16:04:47 -04:00
parent 8e4b9da97d
commit 3d4d260a34
2 changed files with 37 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
libi2pd/LeaseSet.cpp
View file

@ -1,6 +1,7 @@
#include <string.h>
#include <openssl/sha.h>
#include <openssl/hmac.h>
#include <zlib.h> // for crc32
#include "I2PEndian.h"
#include "Crypto.h"
#include "Ed25519.h"
@ -263,6 +264,41 @@ namespace data
m_SigType = identity->GetSigningKeyType ();
}
BlindedPublicKey::BlindedPublicKey (const std::string& b33)
{
uint8_t addr[40]; // TODO: define lenght from b33
size_t l = i2p::data::Base32ToByteStream (b33.c_str (), b33.length (), addr, 40);
uint32_t checksum = crc32 (0, addr + 3, l - 3);
// checksum is Little Endian
addr[0] ^= checksum; addr[1] ^= (checksum >> 8); addr[2] ^= (checksum >> 16);
uint8_t flag = addr[0];
size_t offset = 1;
if (flag & 0x01) // two bytes signatures
{
m_SigType = bufbe16toh (addr + offset); offset += 2;
m_BlindedSigType = bufbe16toh (addr + offset); offset += 2;
}
else // one byte sig
{
m_SigType = addr[offset]; offset++;
m_BlindedSigType = addr[offset]; offset++;
}
std::unique_ptr<i2p::crypto::Verifier> blindedVerifier (i2p::data::IdentityEx::CreateVerifier (m_SigType));
if (blindedVerifier)
{
auto len = blindedVerifier->GetPublicKeyLen ();
if (offset + len <= l)
{
m_PublicKey.resize (len);
memcpy (m_PublicKey.data (), addr + offset, len);
}
else
LogPrint (eLogError, "LeaseSet2: public key in b33 address is too short for signature type ", (int)m_SigType);
}
else
LogPrint (eLogError, "LeaseSet2: unknown signature type ", (int)m_SigType, " in b33");
}
LeaseSet2::LeaseSet2 (uint8_t storeType, const uint8_t * buf, size_t len, bool storeLeases):
LeaseSet (storeLeases), m_StoreType (storeType)
{

1
libi2pd/LeaseSet.h
View file

@ -133,6 +133,7 @@ namespace data
public:
BlindedPublicKey (std::shared_ptr<const IdentityEx> identity, SigningKeyType blindedKeyType = i2p::data::SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519);
BlindedPublicKey (const std::string& b33); // from b33 without .b32.i2p
const uint8_t * GetPublicKey () const { return m_PublicKey.data (); };
size_t GetPublicKeyLen () const { return m_PublicKey.size (); };