mirror of
https://github.com/PurpleI2P/i2pd.git
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307 lines
11 KiB
C++
307 lines
11 KiB
C++
/*
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* Copyright (c) 2013-2021, 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 <atomic>
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#include <vector>
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#include <mutex>
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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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namespace data {
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typedef Tag<32> IdentHash;
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inline std::string GetIdentHashAbbreviation(const IdentHash &ident) {
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return ident.ToBase64().substr(0, 4);
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}
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struct Keys {
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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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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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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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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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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>
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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 i2p::crypto::Verifier *m_Verifier = nullptr;
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mutable std::mutex m_VerifierMutex;
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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>
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CreateDecryptor(CryptoKeyType cryptoType, const uint8_t *key);
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static PrivateKeys CreateRandomKeys(SigningKeyType type = SIGNING_KEY_TYPE_DSA_SHA1,
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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
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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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union {
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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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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
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GetEncryptionType() const { return GetIdentity()->GetCryptoKeyType(); }; // override in LeaseSet2
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};
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class LocalDestination {
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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,
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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 {
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return GetIdentity()->GetCryptoKeyType() == keyType;
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}; // override for LeaseSet
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virtual const uint8_t *GetEncryptionPublicKey(
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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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