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>
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#include <memory>
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#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; };
const uint64_t * GetLL () const { return ll; };
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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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std::string ToBase32 () const
{
char str[sz*2];
int l = i2p::data::ByteStreamToBase32 (m_Buf, sz, str, sz*2);
str[l] = 0;
return std::string (str);
}
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void FromBase32 (const std::string& s)
{
i2p::data::Base32ToByteStream (s.c_str (), s.length (), m_Buf, sz);
}
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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 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;
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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 () = default;
Identity (const Keys& keys) { *this = keys; };
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Identity& operator=(const Keys& keys);
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size_t FromBuffer (const uint8_t * buf, size_t len);
IdentHash Hash () const;
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};
#pragma pack()
Keys CreateRandomKeys ();
const size_t DEFAULT_IDENTITY_SIZE = sizeof (Identity); // 387 bytes
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const uint16_t CRYPTO_KEY_TYPE_ELGAMAL = 0;
const uint16_t SIGNING_KEY_TYPE_DSA_SHA1 = 0;
const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA256_P256 = 1;
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const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA384_P384 = 2;
const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA512_P521 = 3;
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const uint16_t SIGNING_KEY_TYPE_RSA_SHA256_2048 = 4;
const uint16_t SIGNING_KEY_TYPE_RSA_SHA384_3072 = 5;
const uint16_t SIGNING_KEY_TYPE_RSA_SHA512_4096 = 6;
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const uint16_t SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519 = 7;
typedef uint16_t SigningKeyType;
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typedef uint16_t CryptoKeyType;
class IdentityEx
{
public:
IdentityEx ();
IdentityEx (const uint8_t * publicKey, const uint8_t * signingKey,
SigningKeyType type = SIGNING_KEY_TYPE_DSA_SHA1);
IdentityEx (const uint8_t * buf, size_t len);
IdentityEx (const IdentityEx& other);
~IdentityEx ();
IdentityEx& operator=(const IdentityEx& other);
IdentityEx& operator=(const Identity& standard);
size_t FromBuffer (const uint8_t * buf, size_t len);
size_t ToBuffer (uint8_t * buf, size_t len) const;
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size_t FromBase64(const std::string& s);
std::string ToBase64 () const;
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 () const;
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size_t GetSigningPrivateKeyLen () const;
size_t GetSignatureLen () const;
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bool Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const;
SigningKeyType GetSigningKeyType () const;
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CryptoKeyType GetCryptoKeyType () const;
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void DropVerifier (); // to save memory
private:
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void CreateVerifier () const;
private:
Identity m_StandardIdentity;
IdentHash m_IdentHash;
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mutable i2p::crypto::Verifier * m_Verifier;
size_t m_ExtendedLen;
uint8_t * m_ExtendedBuffer;
};
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class PrivateKeys // for eepsites
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{
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public:
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PrivateKeys (): m_Signer (nullptr) {};
PrivateKeys (const PrivateKeys& other): m_Signer (nullptr) { *this = other; };
PrivateKeys (const Keys& keys): m_Signer (nullptr) { *this = keys; };
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PrivateKeys& operator=(const Keys& keys);
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PrivateKeys& operator=(const PrivateKeys& other);
~PrivateKeys () { delete m_Signer; };
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const IdentityEx& GetPublic () const { return m_Public; };
const uint8_t * GetPrivateKey () const { return m_PrivateKey; };
const uint8_t * GetSigningPrivateKey () const { return m_SigningPrivateKey; };
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void Sign (const uint8_t * buf, int len, uint8_t * signature) const;
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size_t GetFullLen () const { return m_Public.GetFullLen () + 256 + m_Public.GetSigningPrivateKeyLen (); };
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size_t FromBuffer (const uint8_t * buf, size_t len);
size_t ToBuffer (uint8_t * buf, size_t len) const;
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size_t FromBase64(const std::string& s);
std::string ToBase64 () const;
static PrivateKeys CreateRandomKeys (SigningKeyType type = SIGNING_KEY_TYPE_DSA_SHA1);
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private:
void CreateSigner ();
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private:
IdentityEx m_Public;
uint8_t m_PrivateKey[256];
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uint8_t m_SigningPrivateKey[1024]; // assume private key doesn't exceed 1024 bytes
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i2p::crypto::Signer * m_Signer;
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};
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// kademlia
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; };
};
IdentHash CreateRoutingKey (const IdentHash& ident);
XORMetric operator^(const IdentHash& key1, const IdentHash& key2);
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// destination for delivery instuctions
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class RoutingDestination
{
public:
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RoutingDestination () {};
virtual ~RoutingDestination () {};
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virtual const IdentHash& GetIdentHash () const = 0;
virtual const uint8_t * GetEncryptionPublicKey () const = 0;
virtual bool IsDestination () const = 0; // for garlic
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std::unique_ptr<const i2p::crypto::ElGamalEncryption>& GetElGamalEncryption () const
{
if (!m_ElGamalEncryption)
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m_ElGamalEncryption.reset (new i2p::crypto::ElGamalEncryption (GetEncryptionPublicKey ()));
return m_ElGamalEncryption;
}
private:
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mutable std::unique_ptr<const i2p::crypto::ElGamalEncryption> m_ElGamalEncryption; // use lazy initialization
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};
class LocalDestination
{
public:
virtual ~LocalDestination() {};
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virtual const PrivateKeys& GetPrivateKeys () const = 0;
virtual const uint8_t * GetEncryptionPrivateKey () const = 0;
virtual const uint8_t * GetEncryptionPublicKey () const = 0;
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const IdentityEx& GetIdentity () const { return GetPrivateKeys ().GetPublic (); };
const IdentHash& GetIdentHash () const { return GetIdentity ().GetIdentHash (); };
void Sign (const uint8_t * buf, int len, uint8_t * signature) const
{
GetPrivateKeys ().Sign (buf, len, signature);
};
};
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}
}
#endif