i2pd/Identity.h

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#ifndef IDENTITY_H__
#define IDENTITY_H__
#include <inttypes.h>
#include <string.h>
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#include <string>
#include "base64.h"
#include "ElGamal.h"
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#include "Signature.h"
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namespace i2p
{
namespace data
{
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template<int sz>
class Tag
{
public:
Tag (const uint8_t * buf) { memcpy (m_Buf, buf, sz); };
Tag (const Tag<sz>& ) = default;
#ifndef _WIN32 // FIXME!!! msvs 2013 can't compile it
Tag (Tag<sz>&& ) = default;
#endif
Tag () = default;
Tag<sz>& operator= (const Tag<sz>& ) = default;
#ifndef _WIN32
Tag<sz>& operator= (Tag<sz>&& ) = default;
#endif
uint8_t * operator()() { return m_Buf; };
const uint8_t * operator()() const { return m_Buf; };
operator uint8_t * () { return m_Buf; };
operator const uint8_t * () const { return m_Buf; };
bool operator== (const Tag<sz>& other) const { return !memcmp (m_Buf, other.m_Buf, sz); };
bool operator< (const Tag<sz>& other) const { return memcmp (m_Buf, other.m_Buf, sz) < 0; };
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std::string ToBase64 () const
{
char str[sz*2];
int l = i2p::data::ByteStreamToBase64 (m_Buf, sz, str, sz*2);
str[l] = 0;
return std::string (str);
}
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private:
union // 8 bytes alignment
{
uint8_t m_Buf[sz];
uint64_t ll[sz/8];
};
};
typedef Tag<32> IdentHash;
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#pragma pack(1)
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struct DHKeysPair // transient keys for transport sessions
{
uint8_t publicKey[256];
uint8_t privateKey[256];
};
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struct Keys
{
uint8_t privateKey[256];
uint8_t signingPrivateKey[20];
uint8_t publicKey[256];
uint8_t signingKey[128];
};
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const uint8_t CERTIFICATE_TYPE_NULL = 0;
const uint8_t CERTIFICATE_TYPE_HASHCASH = 1;
const uint8_t CERTIFICATE_TYPE_HIDDEN = 2;
const uint8_t CERTIFICATE_TYPE_SIGNED = 3;
const uint8_t CERTIFICATE_TYPE_MULTIPLE = 4;
const uint8_t CERTIFICATE_TYPE_KEY = 5;
const uint16_t PUBLIC_KEY_TYPE_DSA_SHA1 = 0;
const uint16_t PUBLIC_KEY_TYPE_ECDSA_SHA256_P256 = 1;
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struct Identity
{
uint8_t publicKey[256];
uint8_t signingKey[128];
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struct
{
uint8_t type;
uint16_t length;
} certificate;
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Identity& operator=(const Keys& keys);
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bool FromBase64(const std::string& );
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size_t FromBuffer (const uint8_t * buf, size_t len);
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IdentHash Hash() const;
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};
const size_t DEFAULT_IDENTITY_SIZE = sizeof (Identity); // 387 bytes
class IdentityEx
{
public:
IdentityEx ();
IdentityEx (const uint8_t * buf, size_t len);
IdentityEx (const IdentityEx& other);
~IdentityEx ();
IdentityEx& operator=(const IdentityEx& other);
size_t FromBuffer (const uint8_t * buf, size_t len);
const Identity& GetStandardIdentity () const { return m_StandardIdentity; };
const IdentHash& GetIdentHash () const { return m_IdentHash; };
size_t GetFullLen () const { return m_ExtendedLen + DEFAULT_IDENTITY_SIZE; };
size_t GetSigningPublicKeyLen ();
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size_t GetSignatureLen ();
bool Verify (const uint8_t * buf, size_t len, const uint8_t * signature);
private:
void CreateVerifier ();
private:
Identity m_StandardIdentity;
IdentHash m_IdentHash;
i2p::crypto::Verifier * m_Verifier;
size_t m_ExtendedLen;
uint8_t * m_ExtendedBuffer;
};
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struct PrivateKeys // for eepsites
{
Identity pub;
uint8_t privateKey[256];
uint8_t signingPrivateKey[20];
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PrivateKeys () = default;
PrivateKeys (const PrivateKeys& ) = default;
PrivateKeys (const Keys& keys) { *this = keys; };
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PrivateKeys& operator=(const Keys& keys);
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};
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#pragma pack()
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Keys CreateRandomKeys ();
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void CreateRandomDHKeysPair (DHKeysPair * keys); // for transport sessions
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// kademlia
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union RoutingKey
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{
uint8_t hash[32];
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uint64_t hash_ll[4];
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};
struct XORMetric
{
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union
{
uint8_t metric[32];
uint64_t metric_ll[4];
};
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void SetMin () { memset (metric, 0, 32); };
void SetMax () { memset (metric, 0xFF, 32); };
bool operator< (const XORMetric& other) const { return memcmp (metric, other.metric, 32) < 0; };
};
RoutingKey CreateRoutingKey (const IdentHash& ident);
XORMetric operator^(const RoutingKey& key1, const RoutingKey& key2);
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// destination for delivery instuctions
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class RoutingDestination
{
public:
RoutingDestination (): m_ElGamalEncryption (nullptr) {};
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virtual ~RoutingDestination () { delete m_ElGamalEncryption; };
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virtual const IdentHash& GetIdentHash () const = 0;
virtual const uint8_t * GetEncryptionPublicKey () const = 0;
virtual bool IsDestination () const = 0; // for garlic
i2p::crypto::ElGamalEncryption * GetElGamalEncryption () const
{
if (!m_ElGamalEncryption)
m_ElGamalEncryption = new i2p::crypto::ElGamalEncryption (GetEncryptionPublicKey ());
return m_ElGamalEncryption;
}
private:
mutable i2p::crypto::ElGamalEncryption * m_ElGamalEncryption; // use lazy initialization
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};
class LocalDestination
{
public:
virtual ~LocalDestination() {};
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virtual const IdentHash& GetIdentHash () const = 0;
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virtual const Identity& GetIdentity () const = 0;
virtual const uint8_t * GetEncryptionPrivateKey () const = 0;
virtual const uint8_t * GetEncryptionPublicKey () const = 0;
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virtual void Sign (const uint8_t * buf, int len, uint8_t * signature) const = 0;
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virtual void SetLeaseSetUpdated () = 0;
};
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}
}
#endif