mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-05 15:11:13 +00:00
327 lines
9.2 KiB
C++
327 lines
9.2 KiB
C++
#include <time.h>
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#include <stdio.h>
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#include <cryptopp/sha.h>
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#include <cryptopp/osrng.h>
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#include <cryptopp/dsa.h>
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#include "base64.h"
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#include "CryptoConst.h"
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#include "RouterContext.h"
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#include "Identity.h"
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#include "I2PEndian.h"
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namespace i2p
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{
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namespace data
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{
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Identity& Identity::operator=(const Keys& keys)
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{
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// copy public and signing keys together
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memcpy (publicKey, keys.publicKey, sizeof (publicKey) + sizeof (signingKey));
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memset (&certificate, 0, sizeof (certificate));
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return *this;
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}
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size_t Identity::FromBuffer (const uint8_t * buf, size_t len)
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{
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memcpy (publicKey, buf, DEFAULT_IDENTITY_SIZE);
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return DEFAULT_IDENTITY_SIZE;
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}
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IdentHash Identity::Hash () const
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{
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IdentHash hash;
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CryptoPP::SHA256().CalculateDigest(hash, publicKey, DEFAULT_IDENTITY_SIZE);
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return hash;
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}
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IdentityEx::IdentityEx ():
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m_Verifier (nullptr), m_ExtendedLen (0), m_ExtendedBuffer (nullptr)
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{
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}
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IdentityEx::IdentityEx(const uint8_t * publicKey, const uint8_t * signingKey, SigningKeyType type)
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{
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memcpy (m_StandardIdentity.publicKey, publicKey, sizeof (m_StandardIdentity.publicKey));
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if (type == SIGNING_KEY_TYPE_ECDSA_SHA256_P256)
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{
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memcpy (m_StandardIdentity.signingKey + 64, signingKey, 64);
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m_StandardIdentity.certificate.type = CERTIFICATE_TYPE_KEY;
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m_ExtendedLen = 4; // 4 bytes extra
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m_StandardIdentity.certificate.length = htobe16 (4);
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m_ExtendedBuffer = new uint8_t[m_ExtendedLen];
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*(uint16_t *)m_ExtendedBuffer = htobe16 (SIGNING_KEY_TYPE_ECDSA_SHA256_P256);
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*(uint16_t *)(m_ExtendedBuffer + 2) = htobe16 (CRYPTO_KEY_TYPE_ELGAMAL);
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uint8_t buf[DEFAULT_IDENTITY_SIZE + 4];
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ToBuffer (buf, DEFAULT_IDENTITY_SIZE + 4);
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CryptoPP::SHA256().CalculateDigest(m_IdentHash, buf, GetFullLen ());
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}
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else // DSA-SHA1
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{
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memcpy (m_StandardIdentity.signingKey, signingKey, sizeof (m_StandardIdentity.signingKey));
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memset (&m_StandardIdentity.certificate, 0, sizeof (m_StandardIdentity.certificate));
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m_IdentHash = m_StandardIdentity.Hash ();
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m_ExtendedLen = 0;
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m_ExtendedBuffer = nullptr;
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}
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CreateVerifier ();
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}
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IdentityEx::IdentityEx (const uint8_t * buf, size_t len):
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m_Verifier (nullptr), m_ExtendedLen (0), m_ExtendedBuffer (nullptr)
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{
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FromBuffer (buf, len);
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}
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IdentityEx::IdentityEx (const IdentityEx& other):
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m_Verifier (nullptr), m_ExtendedBuffer (nullptr)
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{
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*this = other;
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}
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IdentityEx::~IdentityEx ()
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{
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delete m_Verifier;
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delete[] m_ExtendedBuffer;
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}
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IdentityEx& IdentityEx::operator=(const IdentityEx& other)
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{
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memcpy (&m_StandardIdentity, &other.m_StandardIdentity, DEFAULT_IDENTITY_SIZE);
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m_IdentHash = other.m_IdentHash;
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delete[] m_ExtendedBuffer;
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m_ExtendedLen = other.m_ExtendedLen;
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if (m_ExtendedLen > 0)
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{
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m_ExtendedBuffer = new uint8_t[m_ExtendedLen];
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memcpy (m_ExtendedBuffer, other.m_ExtendedBuffer, m_ExtendedLen);
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}
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else
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m_ExtendedBuffer = nullptr;
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delete m_Verifier;
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m_Verifier = nullptr;
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return *this;
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}
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IdentityEx& IdentityEx::operator=(const Identity& standard)
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{
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m_StandardIdentity = standard;
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m_IdentHash = m_StandardIdentity.Hash ();
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delete[] m_ExtendedBuffer;
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m_ExtendedBuffer = nullptr;
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m_ExtendedLen = 0;
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delete m_Verifier;
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m_Verifier = nullptr;
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return *this;
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}
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size_t IdentityEx::FromBuffer (const uint8_t * buf, size_t len)
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{
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memcpy (&m_StandardIdentity, buf, DEFAULT_IDENTITY_SIZE);
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delete[] m_ExtendedBuffer;
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if (m_StandardIdentity.certificate.length)
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{
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m_ExtendedLen = be16toh (m_StandardIdentity.certificate.length);
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m_ExtendedBuffer = new uint8_t[m_ExtendedLen];
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memcpy (m_ExtendedBuffer, buf + DEFAULT_IDENTITY_SIZE, m_ExtendedLen);
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}
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else
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{
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m_ExtendedLen = 0;
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m_ExtendedBuffer = nullptr;
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}
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CryptoPP::SHA256().CalculateDigest(m_IdentHash, buf, GetFullLen ());
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delete m_Verifier;
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m_Verifier = nullptr;
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return GetFullLen ();
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}
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size_t IdentityEx::ToBuffer (uint8_t * buf, size_t len) const
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{
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memcpy (buf, &m_StandardIdentity, DEFAULT_IDENTITY_SIZE);
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if (m_ExtendedLen > 0 && m_ExtendedBuffer)
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memcpy (buf + DEFAULT_IDENTITY_SIZE, m_ExtendedBuffer, m_ExtendedLen);
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return GetFullLen ();
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}
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size_t IdentityEx::FromBase64(const std::string& s)
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{
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uint8_t buf[512];
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auto len = Base64ToByteStream (s.c_str(), s.length(), buf, 512);
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return FromBuffer (buf, len);
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}
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size_t IdentityEx::GetSigningPublicKeyLen () const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->GetPublicKeyLen ();
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return 128;
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}
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size_t IdentityEx::GetSignatureLen () const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->GetSignatureLen ();
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return 40;
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}
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bool IdentityEx::Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->Verify (buf, len, signature);
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return false;
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}
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SigningKeyType IdentityEx::GetSigningKeyType () const
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{
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if (m_StandardIdentity.certificate.type == CERTIFICATE_TYPE_KEY && m_ExtendedBuffer)
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return be16toh (*(const uint16_t *)m_ExtendedBuffer); // signing key
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return SIGNING_KEY_TYPE_DSA_SHA1;
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}
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void IdentityEx::CreateVerifier () const
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{
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auto keyType = GetSigningKeyType ();
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switch (keyType)
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{
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case SIGNING_KEY_TYPE_DSA_SHA1:
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m_Verifier = new i2p::crypto::DSAVerifier (m_StandardIdentity.signingKey);
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break;
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case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
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m_Verifier = new i2p::crypto::ECDSAP256Verifier (m_StandardIdentity.signingKey + 64);
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break;
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default:
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LogPrint ("Signing key type ", (int)keyType, " is not supported");
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}
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}
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PrivateKeys& PrivateKeys::operator=(const Keys& keys)
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{
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m_Public = Identity (keys);
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memcpy (m_PrivateKey, keys.privateKey, 256); // 256
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memcpy (m_SigningPrivateKey, keys.signingPrivateKey, 20); // 20 - DSA
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delete m_Signer;
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CreateSigner ();
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return *this;
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}
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PrivateKeys& PrivateKeys::operator=(const PrivateKeys& other)
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{
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m_Public = other.m_Public;
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memcpy (m_PrivateKey, other.m_PrivateKey, 256); // 256
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memcpy (m_SigningPrivateKey, other.m_SigningPrivateKey, 128); // 128
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delete m_Signer;
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CreateSigner ();
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return *this;
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}
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size_t PrivateKeys::FromBuffer (const uint8_t * buf, size_t len)
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{
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size_t ret = m_Public.FromBuffer (buf, len);
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memcpy (m_PrivateKey, buf + ret, 256); // private key always 256
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ret += 256;
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size_t signingPrivateKeySize = m_Public.GetSignatureLen ()/2; // 20 for DSA
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memcpy (m_SigningPrivateKey, buf + ret, signingPrivateKeySize);
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ret += signingPrivateKeySize;
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delete m_Signer;
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CreateSigner ();
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return ret;
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}
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size_t PrivateKeys::ToBuffer (uint8_t * buf, size_t len) const
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{
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size_t ret = m_Public.ToBuffer (buf, len);
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memcpy (buf + ret, m_PrivateKey, 256); // private key always 256
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ret += 256;
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size_t signingPrivateKeySize = m_Public.GetSignatureLen ()/2; // 20 for DSA
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memcpy (buf + ret, m_SigningPrivateKey, signingPrivateKeySize);
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ret += signingPrivateKeySize;
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return ret;
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}
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void PrivateKeys::Sign (const uint8_t * buf, int len, uint8_t * signature) const
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{
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if (m_Signer)
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m_Signer->Sign (i2p::context.GetRandomNumberGenerator (), buf, len, signature);
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}
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void PrivateKeys::CreateSigner ()
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{
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if (m_Public.GetSigningKeyType () == SIGNING_KEY_TYPE_ECDSA_SHA256_P256)
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m_Signer = new i2p::crypto::ECDSAP256Signer (m_SigningPrivateKey);
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else
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m_Signer = new i2p::crypto::DSASigner (m_SigningPrivateKey);
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}
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PrivateKeys PrivateKeys::CreateRandomKeys (SigningKeyType type)
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{
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if (type == SIGNING_KEY_TYPE_ECDSA_SHA256_P256)
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{
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PrivateKeys keys;
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auto& rnd = i2p::context.GetRandomNumberGenerator ();
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// encryption
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uint8_t publicKey[256];
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CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
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dh.GenerateKeyPair(rnd, keys.m_PrivateKey, publicKey);
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// signature
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uint8_t signingPublicKey[64];
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i2p::crypto::CreateECDSAP256RandomKeys (rnd, keys.m_SigningPrivateKey, signingPublicKey);
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keys.m_Public = IdentityEx (publicKey, signingPublicKey, SIGNING_KEY_TYPE_ECDSA_SHA256_P256);
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keys.CreateSigner ();
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return keys;
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}
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return PrivateKeys (i2p::data::CreateRandomKeys ()); // DSA-SHA1
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}
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Keys CreateRandomKeys ()
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{
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Keys keys;
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auto& rnd = i2p::context.GetRandomNumberGenerator ();
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// encryption
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CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
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dh.GenerateKeyPair(rnd, keys.privateKey, keys.publicKey);
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// signing
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i2p::crypto::CreateDSARandomKeys (rnd, keys.signingPrivateKey, keys.signingKey);
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return keys;
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}
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IdentHash CreateRoutingKey (const IdentHash& ident)
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{
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uint8_t buf[41]; // ident + yyyymmdd
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memcpy (buf, (const uint8_t *)ident, 32);
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time_t t = time (nullptr);
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struct tm tm;
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#ifdef _WIN32
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gmtime_s(&tm, &t);
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sprintf_s((char *)(buf + 32), 9, "%04i%02i%02i", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
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#else
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gmtime_r(&t, &tm);
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sprintf((char *)(buf + 32), "%04i%02i%02i", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
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#endif
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IdentHash key;
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CryptoPP::SHA256().CalculateDigest((uint8_t *)key, buf, 40);
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return key;
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}
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XORMetric operator^(const IdentHash& key1, const IdentHash& key2)
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{
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XORMetric m;
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const uint64_t * hash1 = key1.GetLL (), * hash2 = key2.GetLL ();
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m.metric_ll[0] = hash1[0] ^ hash2[0];
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m.metric_ll[1] = hash1[1] ^ hash2[1];
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m.metric_ll[2] = hash1[2] ^ hash2[2];
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m.metric_ll[3] = hash1[3] ^ hash2[3];
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return m;
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}
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}
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}
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