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I2P: End-to-End encrypted and anonymous Internet
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245 lines
9.1 KiB
245 lines
9.1 KiB
/* |
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* Copyright (c) 2013-2023, The PurpleI2P Project |
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* |
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* This file is part of Purple i2pd project and licensed under BSD3 |
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* |
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* See full license text in LICENSE file at top of project tree |
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*/ |
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#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 <vector> |
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#include "Base.h" |
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#include "Signature.h" |
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#include "CryptoKey.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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const uint8_t IDENTITY_HASH_SIZE = 32; |
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typedef Tag<IDENTITY_HASH_SIZE> IdentHash; |
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inline std::string GetIdentHashAbbreviation (const IdentHash& ident) |
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{ |
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return ident.ToBase64 ().substr (0, 4); |
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} |
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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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uint8_t certificate[3]; // byte 1 - type, bytes 2-3 - length |
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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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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 CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC = 1; |
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const uint16_t CRYPTO_KEY_TYPE_ECIES_X25519_AEAD = 4; |
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const uint16_t CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC_TEST = 65280; // TODO: remove later |
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const uint16_t CRYPTO_KEY_TYPE_ECIES_GOSTR3410_CRYPTO_PRO_A_SHA256_AES256CBC = 65281; // TODO: use GOST R 34.11 instead SHA256 and GOST 28147-89 instead AES |
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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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const uint16_t SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519ph = 8; // not implemented |
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const uint16_t SIGNING_KEY_TYPE_GOSTR3410_CRYPTO_PRO_A_GOSTR3411_256 = 9; |
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const uint16_t SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512 = 10; // approved by FSB |
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const uint16_t SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519 = 11; // for LeaseSet2 only |
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typedef uint16_t SigningKeyType; |
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typedef uint16_t CryptoKeyType; |
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const size_t MAX_EXTENDED_BUFFER_SIZE = 8; // cryptoKeyType + signingKeyType + 4 extra bytes of P521 |
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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, CryptoKeyType cryptoType = CRYPTO_KEY_TYPE_ELGAMAL); |
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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 (const Identity& standard); |
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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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const uint8_t * GetEncryptionPublicKey () const { return m_StandardIdentity.publicKey; }; |
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uint8_t * GetEncryptionPublicKeyBuffer () { return m_StandardIdentity.publicKey; }; |
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std::shared_ptr<i2p::crypto::CryptoKeyEncryptor> CreateEncryptor (const uint8_t * key) const; |
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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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const uint8_t * GetSigningPublicKeyBuffer () const; // returns NULL for P521 |
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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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bool IsRSA () const; // signing key type |
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CryptoKeyType GetCryptoKeyType () const; |
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bool operator == (const IdentityEx & other) const { return GetIdentHash() == other.GetIdentHash(); } |
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void RecalculateIdentHash(uint8_t * buff=nullptr); |
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static i2p::crypto::Verifier * CreateVerifier (SigningKeyType keyType); |
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static std::shared_ptr<i2p::crypto::CryptoKeyEncryptor> CreateEncryptor (CryptoKeyType keyType, const uint8_t * key); |
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private: |
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void CreateVerifier (); |
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private: |
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Identity m_StandardIdentity; |
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IdentHash m_IdentHash; |
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std::unique_ptr<i2p::crypto::Verifier> m_Verifier; |
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size_t m_ExtendedLen; |
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uint8_t m_ExtendedBuffer[MAX_EXTENDED_BUFFER_SIZE]; |
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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 () = default; |
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PrivateKeys (const PrivateKeys& other) { *this = other; }; |
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PrivateKeys (const Keys& keys) { *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 () = default; |
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std::shared_ptr<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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size_t GetSignatureLen () const; // might not match identity |
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bool IsOfflineSignature () const { return m_TransientSignatureLen > 0; }; |
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uint8_t * GetPadding(); |
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void RecalculateIdentHash(uint8_t * buf=nullptr) { m_Public->RecalculateIdentHash(buf); } |
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void Sign (const uint8_t * buf, int len, uint8_t * signature) const; |
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size_t GetFullLen () const; |
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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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std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> CreateDecryptor (const uint8_t * key) const; |
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static std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> CreateDecryptor (CryptoKeyType cryptoType, const uint8_t * key); |
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static PrivateKeys CreateRandomKeys (SigningKeyType type = SIGNING_KEY_TYPE_DSA_SHA1, CryptoKeyType cryptoType = CRYPTO_KEY_TYPE_ELGAMAL, bool isDestination = false); |
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static void GenerateSigningKeyPair (SigningKeyType type, uint8_t * priv, uint8_t * pub); |
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static void GenerateCryptoKeyPair (CryptoKeyType type, uint8_t * priv, uint8_t * pub); // priv and pub are 256 bytes long |
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static i2p::crypto::Signer * CreateSigner (SigningKeyType keyType, const uint8_t * priv); |
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// offline keys |
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PrivateKeys CreateOfflineKeys (SigningKeyType type, uint32_t expires) const; |
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const std::vector<uint8_t>& GetOfflineSignature () const { return m_OfflineSignature; }; |
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private: |
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void CreateSigner () const; |
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void CreateSigner (SigningKeyType keyType) const; |
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size_t GetPrivateKeyLen () const; |
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private: |
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std::shared_ptr<IdentityEx> m_Public; |
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uint8_t m_PrivateKey[256]; |
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uint8_t m_SigningPrivateKey[128]; // assume private key doesn't exceed 128 bytes |
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mutable std::unique_ptr<i2p::crypto::Signer> m_Signer; |
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std::vector<uint8_t> m_OfflineSignature; // non zero length, if applicable |
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size_t m_TransientSignatureLen = 0; |
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size_t m_TransientSigningPrivateKeyLen = 0; |
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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 std::shared_ptr<const IdentityEx> GetIdentity () const = 0; |
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virtual void Encrypt (const uint8_t * data, uint8_t * encrypted) const = 0; // encrypt data for |
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virtual bool IsDestination () const = 0; // for garlic |
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const IdentHash& GetIdentHash () const { return GetIdentity ()->GetIdentHash (); }; |
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virtual CryptoKeyType GetEncryptionType () const { return GetIdentity ()->GetCryptoKeyType (); }; // override in LeaseSet2 |
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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 bool Decrypt (const uint8_t * encrypted, uint8_t * data, CryptoKeyType preferredCrypto = CRYPTO_KEY_TYPE_ELGAMAL) const = 0; |
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virtual std::shared_ptr<const IdentityEx> GetIdentity () const = 0; |
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const IdentHash& GetIdentHash () const { return GetIdentity ()->GetIdentHash (); }; |
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virtual bool SupportsEncryptionType (CryptoKeyType keyType) const { return GetIdentity ()->GetCryptoKeyType () == keyType; }; // override for LeaseSet |
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virtual const uint8_t * GetEncryptionPublicKey (CryptoKeyType keyType) const { return GetIdentity ()->GetEncryptionPublicKey (); }; // override for LeaseSet |
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}; |
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} |
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} |
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#endif
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