mirror of
https://github.com/PurpleI2P/i2pd.git
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233 lines
8.2 KiB
C++
233 lines
8.2 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 <atomic>
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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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typedef Tag<32> 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_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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// following signature type should never appear in netid=2
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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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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, 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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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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void DropVerifier () const; // to save memory
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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 () const;
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void UpdateVerifier (i2p::crypto::Verifier * verifier) 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 std::unique_ptr<i2p::crypto::Verifier> m_Verifier;
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mutable std::atomic_bool m_IsVerifierCreated; // make sure we don't create twice
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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 () = 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);
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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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// 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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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 instuctions
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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, BN_CTX * ctx) 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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};
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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, BN_CTX * ctx) 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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};
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}
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}
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#endif
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