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280 lines
9.2 KiB
C++
280 lines
9.2 KiB
C++
#ifndef IDENTITY_H__
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#define IDENTITY_H__
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#include <inttypes.h>
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#include <string.h>
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#include <string>
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#include <memory>
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#include "util/base64.h"
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#include "crypto/ElGamal.h"
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namespace i2p {
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// Forward declaration to avoid include
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namespace crypto {
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class Signer;
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class Verifier;
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}
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namespace data {
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template<int sz>
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class Tag
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{
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public:
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Tag (const uint8_t * buf) { memcpy (m_Buf, buf, sz); };
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Tag (const Tag<sz>& ) = default;
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#ifndef _WIN32 // FIXME!!! msvs 2013 can't compile it
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Tag (Tag<sz>&& ) = default;
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#endif
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Tag () = default;
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Tag<sz>& operator= (const Tag<sz>& ) = default;
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#ifndef _WIN32
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Tag<sz>& operator= (Tag<sz>&& ) = default;
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#endif
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uint8_t * operator()() { return m_Buf; };
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const uint8_t * operator()() const { return m_Buf; };
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operator uint8_t * () { return m_Buf; };
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operator const uint8_t * () const { return m_Buf; };
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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); };
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bool operator< (const Tag<sz>& other) const { return memcmp (m_Buf, other.m_Buf, sz) < 0; };
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bool IsZero () const
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{
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for (int i = 0; i < sz/8; i++)
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if (ll[i]) return false;
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return true;
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}
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std::string ToBase64 () const
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{
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char str[sz*2];
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int l = i2p::util::ByteStreamToBase64 (m_Buf, sz, str, sz*2);
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str[l] = 0;
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return std::string (str);
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}
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std::string ToBase32 () const
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{
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char str[sz*2];
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int l = i2p::util::ByteStreamToBase32 (m_Buf, sz, str, sz*2);
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str[l] = 0;
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return std::string (str);
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}
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void FromBase32 (const std::string& s)
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{
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i2p::util::Base32ToByteStream (s.c_str (), s.length (), m_Buf, sz);
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}
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void FromBase64 (const std::string& s)
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{
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i2p::util::Base64ToByteStream (s.c_str (), s.length (), m_Buf, sz);
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}
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private:
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union // 8 bytes alignment
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{
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uint8_t m_Buf[sz];
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uint64_t ll[sz/8];
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};
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};
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typedef Tag<32> IdentHash;
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#pragma pack(1)
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struct Keys
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{
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uint8_t privateKey[256];
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uint8_t signingPrivateKey[20];
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uint8_t publicKey[256];
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uint8_t signingKey[128];
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};
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const uint8_t CERTIFICATE_TYPE_NULL = 0;
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const uint8_t CERTIFICATE_TYPE_HASHCASH = 1;
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const uint8_t CERTIFICATE_TYPE_HIDDEN = 2;
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const uint8_t CERTIFICATE_TYPE_SIGNED = 3;
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const uint8_t CERTIFICATE_TYPE_MULTIPLE = 4;
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const uint8_t CERTIFICATE_TYPE_KEY = 5;
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struct Identity
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{
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uint8_t publicKey[256];
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uint8_t signingKey[128];
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struct
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{
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uint8_t type;
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uint16_t length;
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} certificate;
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Identity () = default;
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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);
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IdentHash Hash () const;
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};
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#pragma pack()
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Keys CreateRandomKeys ();
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const size_t DEFAULT_IDENTITY_SIZE = sizeof (Identity); // 387 bytes
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const uint16_t CRYPTO_KEY_TYPE_ELGAMAL = 0;
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const uint16_t SIGNING_KEY_TYPE_DSA_SHA1 = 0;
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const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA256_P256 = 1;
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const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA384_P384 = 2;
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const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA512_P521 = 3;
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const uint16_t SIGNING_KEY_TYPE_RSA_SHA256_2048 = 4;
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const uint16_t SIGNING_KEY_TYPE_RSA_SHA384_3072 = 5;
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const uint16_t SIGNING_KEY_TYPE_RSA_SHA512_4096 = 6;
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const uint16_t SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519 = 7;
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typedef uint16_t SigningKeyType;
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typedef uint16_t CryptoKeyType;
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class IdentityEx
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{
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public:
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IdentityEx ();
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IdentityEx (const uint8_t * publicKey, const uint8_t * signingKey,
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SigningKeyType type = SIGNING_KEY_TYPE_DSA_SHA1);
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IdentityEx (const uint8_t * buf, size_t len);
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IdentityEx (const IdentityEx& other);
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~IdentityEx ();
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IdentityEx& operator=(const IdentityEx& other);
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IdentityEx& operator=(const Identity& standard);
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size_t FromBuffer (const uint8_t * buf, size_t len);
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size_t ToBuffer (uint8_t * buf, size_t len) const;
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size_t FromBase64(const std::string& s);
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std::string ToBase64 () const;
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const Identity& GetStandardIdentity () const { return m_StandardIdentity; };
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const IdentHash& GetIdentHash () const { return m_IdentHash; };
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size_t GetFullLen () const { return m_ExtendedLen + DEFAULT_IDENTITY_SIZE; };
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size_t GetSigningPublicKeyLen () const;
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size_t GetSigningPrivateKeyLen () const;
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size_t GetSignatureLen () const;
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bool Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const;
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SigningKeyType GetSigningKeyType () const;
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CryptoKeyType GetCryptoKeyType () const;
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void DropVerifier (); // to save memory
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private:
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void CreateVerifier () const;
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private:
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Identity m_StandardIdentity;
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IdentHash m_IdentHash;
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mutable i2p::crypto::Verifier * m_Verifier;
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size_t m_ExtendedLen;
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uint8_t * m_ExtendedBuffer;
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};
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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) {};
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PrivateKeys (const PrivateKeys& other): m_Signer (nullptr) { *this = other; };
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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);
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~PrivateKeys ();
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const IdentityEx& GetPublic () const { return m_Public; };
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const uint8_t * GetPrivateKey () const { return m_PrivateKey; };
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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);
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size_t ToBuffer (uint8_t * buf, size_t len) const;
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size_t FromBase64(const std::string& s);
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std::string ToBase64 () const;
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static PrivateKeys CreateRandomKeys (SigningKeyType type = SIGNING_KEY_TYPE_DSA_SHA1);
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private:
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void CreateSigner ();
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private:
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IdentityEx m_Public;
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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
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struct XORMetric
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{
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union
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{
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uint8_t metric[32];
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uint64_t metric_ll[4];
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};
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void SetMin () { memset (metric, 0, 32); };
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void SetMax () { memset (metric, 0xFF, 32); };
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bool operator< (const XORMetric& other) const { return memcmp (metric, other.metric, 32) < 0; };
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};
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IdentHash CreateRoutingKey (const IdentHash& ident);
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XORMetric operator^(const IdentHash& key1, const IdentHash& key2);
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// destination for delivery instructions
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class RoutingDestination
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{
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public:
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RoutingDestination () {};
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virtual ~RoutingDestination () {};
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virtual const IdentHash& GetIdentHash () const = 0;
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virtual const uint8_t * GetEncryptionPublicKey () const = 0;
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virtual bool IsDestination () const = 0; // for garlic
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std::unique_ptr<const i2p::crypto::ElGamalEncryption>& GetElGamalEncryption () const
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{
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if (!m_ElGamalEncryption)
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m_ElGamalEncryption.reset (new i2p::crypto::ElGamalEncryption (GetEncryptionPublicKey ()));
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return m_ElGamalEncryption;
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}
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private:
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mutable std::unique_ptr<const i2p::crypto::ElGamalEncryption> m_ElGamalEncryption; // use lazy initialization
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};
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class LocalDestination
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{
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public:
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virtual ~LocalDestination() {};
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virtual const PrivateKeys& GetPrivateKeys () const = 0;
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virtual const uint8_t * GetEncryptionPrivateKey () const = 0;
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virtual const uint8_t * GetEncryptionPublicKey () const = 0;
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const IdentityEx& GetIdentity () const { return GetPrivateKeys ().GetPublic (); };
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const IdentHash& GetIdentHash () const { return GetIdentity ().GetIdentHash (); };
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void Sign (const uint8_t * buf, int len, uint8_t * signature) const
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{
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GetPrivateKeys ().Sign (buf, len, signature);
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};
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};
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}
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}
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#endif
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