mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-17 21:26:04 +00:00
864 lines
28 KiB
C++
864 lines
28 KiB
C++
/*
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* Copyright (c) 2013-2022, 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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#include "Crypto.h"
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#include "I2PEndian.h"
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#include "Log.h"
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#include "Timestamp.h"
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#include "Identity.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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Identity& Identity::operator=(const Keys& keys)
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{
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// copy public and signing keys together
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memcpy (publicKey, keys.publicKey, sizeof (publicKey));
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memcpy (signingKey, keys.signingKey, sizeof (signingKey));
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memset (certificate, 0, sizeof (certificate));
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return *this;
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}
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size_t Identity::FromBuffer (const uint8_t * buf, size_t len)
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{
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if ( len < DEFAULT_IDENTITY_SIZE ) {
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// buffer too small, don't overflow
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return 0;
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}
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memcpy (publicKey, buf, DEFAULT_IDENTITY_SIZE);
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return DEFAULT_IDENTITY_SIZE;
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}
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IdentHash Identity::Hash () const
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{
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IdentHash hash;
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SHA256(publicKey, DEFAULT_IDENTITY_SIZE, hash);
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return hash;
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}
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IdentityEx::IdentityEx ():
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m_ExtendedLen (0)
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{
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}
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IdentityEx::IdentityEx(const uint8_t * publicKey, const uint8_t * signingKey, SigningKeyType type, CryptoKeyType cryptoType)
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{
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uint8_t randomPaddingBlock[32];
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RAND_bytes (randomPaddingBlock, 32);
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if (cryptoType == CRYPTO_KEY_TYPE_ECIES_X25519_AEAD)
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{
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memcpy (m_StandardIdentity.publicKey, publicKey ? publicKey : randomPaddingBlock, 32);
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for (int i = 0; i < 7; i++) // 224 bytes
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memcpy (m_StandardIdentity.publicKey + 32*(i + 1), randomPaddingBlock, 32);
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}
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else
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{
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if (publicKey)
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memcpy (m_StandardIdentity.publicKey, publicKey, 256);
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else
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for (int i = 0; i < 8; i++) // 256 bytes
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memcpy (m_StandardIdentity.publicKey + 32*i, randomPaddingBlock, 32);
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}
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if (type != SIGNING_KEY_TYPE_DSA_SHA1)
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{
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size_t excessLen = 0;
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uint8_t * excessBuf = nullptr;
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switch (type)
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{
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case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
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{
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size_t padding = 128 - i2p::crypto::ECDSAP256_KEY_LENGTH; // 64 = 128 - 64
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RAND_bytes (m_StandardIdentity.signingKey, padding);
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memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::ECDSAP256_KEY_LENGTH);
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break;
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}
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case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
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{
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size_t padding = 128 - i2p::crypto::ECDSAP384_KEY_LENGTH; // 32 = 128 - 96
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RAND_bytes (m_StandardIdentity.signingKey, padding);
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memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::ECDSAP384_KEY_LENGTH);
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break;
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}
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case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
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{
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memcpy (m_StandardIdentity.signingKey, signingKey, 128);
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excessLen = i2p::crypto::ECDSAP521_KEY_LENGTH - 128; // 4 = 132 - 128
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excessBuf = new uint8_t[excessLen];
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memcpy (excessBuf, signingKey + 128, excessLen);
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break;
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}
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case SIGNING_KEY_TYPE_RSA_SHA256_2048:
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case SIGNING_KEY_TYPE_RSA_SHA384_3072:
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case SIGNING_KEY_TYPE_RSA_SHA512_4096:
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LogPrint (eLogError, "Identity: RSA signing key type ", (int)type, " is not supported");
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break;
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case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
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case SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519:
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{
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size_t padding = 128 - i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH; // 96 = 128 - 32
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for (int i = 0; i < 3; i++) // 96 bytes
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memcpy (m_StandardIdentity.signingKey + 32*i, randomPaddingBlock, 32);
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memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH);
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break;
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}
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case SIGNING_KEY_TYPE_GOSTR3410_CRYPTO_PRO_A_GOSTR3411_256:
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{
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// 256
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size_t padding = 128 - i2p::crypto::GOSTR3410_256_PUBLIC_KEY_LENGTH; // 64 = 128 - 64
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RAND_bytes (m_StandardIdentity.signingKey, padding);
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memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::GOSTR3410_256_PUBLIC_KEY_LENGTH);
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break;
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}
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case SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512:
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{
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// 512
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// no padding, key length is 128
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memcpy (m_StandardIdentity.signingKey, signingKey, i2p::crypto::GOSTR3410_512_PUBLIC_KEY_LENGTH);
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break;
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}
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default:
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LogPrint (eLogError, "Identity: Signing key type ", (int)type, " is not supported");
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}
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m_ExtendedLen = 4 + excessLen; // 4 bytes extra + excess length
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// fill certificate
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m_StandardIdentity.certificate[0] = CERTIFICATE_TYPE_KEY;
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htobe16buf (m_StandardIdentity.certificate + 1, m_ExtendedLen);
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// fill extended buffer
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htobe16buf (m_ExtendedBuffer, type);
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htobe16buf (m_ExtendedBuffer + 2, cryptoType);
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if (excessLen && excessBuf)
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{
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if (excessLen > MAX_EXTENDED_BUFFER_SIZE - 4)
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{
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LogPrint (eLogError, "Identity: Unexpected excessive signing key len ", excessLen);
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excessLen = MAX_EXTENDED_BUFFER_SIZE - 4;
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}
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memcpy (m_ExtendedBuffer + 4, excessBuf, excessLen);
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delete[] excessBuf;
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}
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// calculate ident hash
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RecalculateIdentHash();
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}
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else // DSA-SHA1
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{
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memcpy (m_StandardIdentity.signingKey, signingKey, sizeof (m_StandardIdentity.signingKey));
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memset (m_StandardIdentity.certificate, 0, sizeof (m_StandardIdentity.certificate));
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m_IdentHash = m_StandardIdentity.Hash ();
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m_ExtendedLen = 0;
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}
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CreateVerifier ();
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}
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void IdentityEx::RecalculateIdentHash(uint8_t * buf)
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{
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bool dofree = buf == nullptr;
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size_t sz = GetFullLen();
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if(!buf)
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buf = new uint8_t[sz];
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ToBuffer (buf, sz);
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SHA256(buf, sz, m_IdentHash);
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if(dofree)
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delete[] buf;
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}
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IdentityEx::IdentityEx (const uint8_t * buf, size_t len):
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m_ExtendedLen (0)
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{
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FromBuffer (buf, len);
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}
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IdentityEx::IdentityEx (const IdentityEx& other):
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m_ExtendedLen (0)
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{
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*this = other;
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}
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IdentityEx::IdentityEx (const Identity& standard):
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m_ExtendedLen (0)
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{
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*this = standard;
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}
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IdentityEx::~IdentityEx ()
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{
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delete m_Verifier;
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}
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IdentityEx& IdentityEx::operator=(const IdentityEx& other)
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{
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memcpy (&m_StandardIdentity, &other.m_StandardIdentity, DEFAULT_IDENTITY_SIZE);
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m_IdentHash = other.m_IdentHash;
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m_ExtendedLen = other.m_ExtendedLen;
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if (m_ExtendedLen > 0)
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{
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if (m_ExtendedLen > MAX_EXTENDED_BUFFER_SIZE) m_ExtendedLen = MAX_EXTENDED_BUFFER_SIZE;
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memcpy (m_ExtendedBuffer, other.m_ExtendedBuffer, m_ExtendedLen);
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}
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delete m_Verifier;
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m_Verifier = nullptr;
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return *this;
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}
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IdentityEx& IdentityEx::operator=(const Identity& standard)
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{
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m_StandardIdentity = standard;
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m_IdentHash = m_StandardIdentity.Hash ();
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m_ExtendedLen = 0;
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delete m_Verifier;
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m_Verifier = nullptr;
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return *this;
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}
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size_t IdentityEx::FromBuffer (const uint8_t * buf, size_t len)
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{
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if (len < DEFAULT_IDENTITY_SIZE)
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{
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LogPrint (eLogError, "Identity: Buffer length ", len, " is too small");
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return 0;
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}
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memcpy (&m_StandardIdentity, buf, DEFAULT_IDENTITY_SIZE);
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m_ExtendedLen = bufbe16toh (m_StandardIdentity.certificate + 1);
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if (m_ExtendedLen)
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{
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if (m_ExtendedLen + DEFAULT_IDENTITY_SIZE <= len)
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{
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if (m_ExtendedLen > MAX_EXTENDED_BUFFER_SIZE) m_ExtendedLen = MAX_EXTENDED_BUFFER_SIZE;
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memcpy (m_ExtendedBuffer, buf + DEFAULT_IDENTITY_SIZE, m_ExtendedLen);
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}
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else
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{
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LogPrint (eLogError, "Identity: Certificate length ", m_ExtendedLen, " exceeds buffer length ", len - DEFAULT_IDENTITY_SIZE);
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m_ExtendedLen = 0;
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return 0;
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}
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}
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else
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m_ExtendedLen = 0;
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SHA256(buf, GetFullLen (), m_IdentHash);
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delete m_Verifier;
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m_Verifier = nullptr;
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return GetFullLen ();
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}
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size_t IdentityEx::ToBuffer (uint8_t * buf, size_t len) const
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{
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const size_t fullLen = GetFullLen();
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if (fullLen > len) return 0; // buffer is too small and may overflow somewhere else
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memcpy (buf, &m_StandardIdentity, DEFAULT_IDENTITY_SIZE);
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if (m_ExtendedLen > 0)
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memcpy (buf + DEFAULT_IDENTITY_SIZE, m_ExtendedBuffer, m_ExtendedLen);
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return fullLen;
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}
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size_t IdentityEx::FromBase64(const std::string& s)
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{
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const size_t slen = s.length();
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std::vector<uint8_t> buf(slen); // binary data can't exceed base64
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const size_t len = Base64ToByteStream (s.c_str(), slen, buf.data(), slen);
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return FromBuffer (buf.data(), len);
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}
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std::string IdentityEx::ToBase64 () const
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{
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const size_t bufLen = GetFullLen();
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const size_t strLen = Base64EncodingBufferSize(bufLen);
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std::vector<uint8_t> buf(bufLen);
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std::vector<char> str(strLen);
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size_t l = ToBuffer (buf.data(), bufLen);
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size_t l1 = i2p::data::ByteStreamToBase64 (buf.data(), l, str.data(), strLen);
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return std::string (str.data(), l1);
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}
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size_t IdentityEx::GetSigningPublicKeyLen () const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->GetPublicKeyLen ();
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return 128;
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}
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const uint8_t * IdentityEx::GetSigningPublicKeyBuffer () const
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{
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auto keyLen = GetSigningPublicKeyLen ();
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if (keyLen > 128) return nullptr; // P521
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return m_StandardIdentity.signingKey + 128 - keyLen;
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}
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size_t IdentityEx::GetSigningPrivateKeyLen () const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->GetPrivateKeyLen ();
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return GetSignatureLen ()/2;
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}
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size_t IdentityEx::GetSignatureLen () const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->GetSignatureLen ();
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return i2p::crypto::DSA_SIGNATURE_LENGTH;
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}
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bool IdentityEx::Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->Verify (buf, len, signature);
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return false;
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}
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SigningKeyType IdentityEx::GetSigningKeyType () const
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{
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if (m_StandardIdentity.certificate[0] == CERTIFICATE_TYPE_KEY && m_ExtendedLen >= 2)
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return bufbe16toh (m_ExtendedBuffer); // signing key
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return SIGNING_KEY_TYPE_DSA_SHA1;
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}
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bool IdentityEx::IsRSA () const
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{
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auto sigType = GetSigningKeyType ();
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return sigType <= SIGNING_KEY_TYPE_RSA_SHA512_4096 && sigType >= SIGNING_KEY_TYPE_RSA_SHA256_2048;
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}
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CryptoKeyType IdentityEx::GetCryptoKeyType () const
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{
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if (m_StandardIdentity.certificate[0] == CERTIFICATE_TYPE_KEY && m_ExtendedLen >= 4)
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return bufbe16toh (m_ExtendedBuffer + 2); // crypto key
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return CRYPTO_KEY_TYPE_ELGAMAL;
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}
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i2p::crypto::Verifier * IdentityEx::CreateVerifier (SigningKeyType keyType)
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{
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switch (keyType)
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{
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case SIGNING_KEY_TYPE_DSA_SHA1:
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return new i2p::crypto::DSAVerifier ();
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case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
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return new i2p::crypto::ECDSAP256Verifier ();
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case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
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return new i2p::crypto::ECDSAP384Verifier ();
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case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
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return new i2p::crypto::ECDSAP521Verifier ();
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case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
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return new i2p::crypto::EDDSA25519Verifier ();
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case SIGNING_KEY_TYPE_GOSTR3410_CRYPTO_PRO_A_GOSTR3411_256:
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return new i2p::crypto::GOSTR3410_256_Verifier (i2p::crypto::eGOSTR3410CryptoProA);
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case SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512:
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return new i2p::crypto::GOSTR3410_512_Verifier (i2p::crypto::eGOSTR3410TC26A512);
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case SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519:
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return new i2p::crypto::RedDSA25519Verifier ();
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case SIGNING_KEY_TYPE_RSA_SHA256_2048:
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case SIGNING_KEY_TYPE_RSA_SHA384_3072:
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case SIGNING_KEY_TYPE_RSA_SHA512_4096:
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LogPrint (eLogError, "Identity: RSA signing key type ", (int)keyType, " is not supported");
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break;
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default:
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LogPrint (eLogError, "Identity: Signing key type ", (int)keyType, " is not supported");
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}
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return nullptr;
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}
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void IdentityEx::CreateVerifier () const
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{
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if (m_Verifier) return; // don't create again
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auto verifier = CreateVerifier (GetSigningKeyType ());
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if (verifier)
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{
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auto keyLen = verifier->GetPublicKeyLen ();
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if (keyLen <= 128)
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verifier->SetPublicKey (m_StandardIdentity.signingKey + 128 - keyLen);
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else
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{
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// for P521
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uint8_t * signingKey = new uint8_t[keyLen];
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memcpy (signingKey, m_StandardIdentity.signingKey, 128);
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size_t excessLen = keyLen - 128;
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memcpy (signingKey + 128, m_ExtendedBuffer + 4, excessLen); // right after signing and crypto key types
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verifier->SetPublicKey (signingKey);
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delete[] signingKey;
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}
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}
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UpdateVerifier (verifier);
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}
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void IdentityEx::UpdateVerifier (i2p::crypto::Verifier * verifier) const
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{
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bool del = false;
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{
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std::lock_guard<std::mutex> l(m_VerifierMutex);
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if (!m_Verifier)
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m_Verifier = verifier;
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else
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del = true;
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}
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if (del)
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delete verifier;
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}
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void IdentityEx::DropVerifier () const
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{
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i2p::crypto::Verifier * verifier;
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{
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std::lock_guard<std::mutex> l(m_VerifierMutex);
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verifier = m_Verifier;
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m_Verifier = nullptr;
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}
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delete verifier;
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}
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std::shared_ptr<i2p::crypto::CryptoKeyEncryptor> IdentityEx::CreateEncryptor (CryptoKeyType keyType, const uint8_t * key)
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{
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switch (keyType)
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{
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case CRYPTO_KEY_TYPE_ELGAMAL:
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return std::make_shared<i2p::crypto::ElGamalEncryptor>(key);
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break;
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case CRYPTO_KEY_TYPE_ECIES_X25519_AEAD:
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return std::make_shared<i2p::crypto::ECIESX25519AEADRatchetEncryptor>(key);
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break;
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case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC:
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case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC_TEST:
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return std::make_shared<i2p::crypto::ECIESP256Encryptor>(key);
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break;
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case CRYPTO_KEY_TYPE_ECIES_GOSTR3410_CRYPTO_PRO_A_SHA256_AES256CBC:
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return std::make_shared<i2p::crypto::ECIESGOSTR3410Encryptor>(key);
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break;
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default:
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LogPrint (eLogError, "Identity: Unknown crypto key type ", (int)keyType);
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};
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return nullptr;
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}
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std::shared_ptr<i2p::crypto::CryptoKeyEncryptor> IdentityEx::CreateEncryptor (const uint8_t * key) const
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{
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if (!key) key = GetEncryptionPublicKey (); // use publicKey
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return CreateEncryptor (GetCryptoKeyType (), key);
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}
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PrivateKeys& PrivateKeys::operator=(const Keys& keys)
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{
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m_Public = std::make_shared<IdentityEx>(Identity (keys));
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memcpy (m_PrivateKey, keys.privateKey, 256); // 256
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memcpy (m_SigningPrivateKey, keys.signingPrivateKey, m_Public->GetSigningPrivateKeyLen ());
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m_OfflineSignature.resize (0);
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m_TransientSignatureLen = 0;
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m_TransientSigningPrivateKeyLen = 0;
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m_Signer = nullptr;
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CreateSigner ();
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return *this;
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}
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PrivateKeys& PrivateKeys::operator=(const PrivateKeys& other)
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{
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m_Public = std::make_shared<IdentityEx>(*other.m_Public);
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memcpy (m_PrivateKey, other.m_PrivateKey, 256); // 256
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m_OfflineSignature = other.m_OfflineSignature;
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m_TransientSignatureLen = other.m_TransientSignatureLen;
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m_TransientSigningPrivateKeyLen = other.m_TransientSigningPrivateKeyLen;
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memcpy (m_SigningPrivateKey, other.m_SigningPrivateKey, m_TransientSigningPrivateKeyLen > 0 ? m_TransientSigningPrivateKeyLen : m_Public->GetSigningPrivateKeyLen ());
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|
m_Signer = nullptr;
|
|
CreateSigner ();
|
|
return *this;
|
|
}
|
|
|
|
size_t PrivateKeys::GetFullLen () const
|
|
{
|
|
size_t ret = m_Public->GetFullLen () + GetPrivateKeyLen () + m_Public->GetSigningPrivateKeyLen ();
|
|
if (IsOfflineSignature ())
|
|
ret += m_OfflineSignature.size () + m_TransientSigningPrivateKeyLen;
|
|
return ret;
|
|
}
|
|
|
|
size_t PrivateKeys::FromBuffer (const uint8_t * buf, size_t len)
|
|
{
|
|
m_Public = std::make_shared<IdentityEx>();
|
|
size_t ret = m_Public->FromBuffer (buf, len);
|
|
auto cryptoKeyLen = GetPrivateKeyLen ();
|
|
if (!ret || ret + cryptoKeyLen > len) return 0; // overflow
|
|
memcpy (m_PrivateKey, buf + ret, cryptoKeyLen);
|
|
ret += cryptoKeyLen;
|
|
size_t signingPrivateKeySize = m_Public->GetSigningPrivateKeyLen ();
|
|
if(signingPrivateKeySize + ret > len || signingPrivateKeySize > 128) return 0; // overflow
|
|
memcpy (m_SigningPrivateKey, buf + ret, signingPrivateKeySize);
|
|
ret += signingPrivateKeySize;
|
|
m_Signer = nullptr;
|
|
// check if signing private key is all zeros
|
|
bool allzeros = true;
|
|
for (size_t i = 0; i < signingPrivateKeySize; i++)
|
|
if (m_SigningPrivateKey[i])
|
|
{
|
|
allzeros = false;
|
|
break;
|
|
}
|
|
if (allzeros)
|
|
{
|
|
// offline information
|
|
const uint8_t * offlineInfo = buf + ret;
|
|
ret += 4; // expires timestamp
|
|
SigningKeyType keyType = bufbe16toh (buf + ret); ret += 2; // key type
|
|
std::unique_ptr<i2p::crypto::Verifier> transientVerifier (IdentityEx::CreateVerifier (keyType));
|
|
if (!transientVerifier) return 0;
|
|
auto keyLen = transientVerifier->GetPublicKeyLen ();
|
|
if (keyLen + ret > len) return 0;
|
|
transientVerifier->SetPublicKey (buf + ret); ret += keyLen;
|
|
if (m_Public->GetSignatureLen () + ret > len) return 0;
|
|
if (!m_Public->Verify (offlineInfo, keyLen + 6, buf + ret))
|
|
{
|
|
LogPrint (eLogError, "Identity: Offline signature verification failed");
|
|
return 0;
|
|
}
|
|
ret += m_Public->GetSignatureLen ();
|
|
m_TransientSignatureLen = transientVerifier->GetSignatureLen ();
|
|
// copy offline signature
|
|
size_t offlineInfoLen = buf + ret - offlineInfo;
|
|
m_OfflineSignature.resize (offlineInfoLen);
|
|
memcpy (m_OfflineSignature.data (), offlineInfo, offlineInfoLen);
|
|
// override signing private key
|
|
m_TransientSigningPrivateKeyLen = transientVerifier->GetPrivateKeyLen ();
|
|
if (m_TransientSigningPrivateKeyLen + ret > len || m_TransientSigningPrivateKeyLen > 128) return 0;
|
|
memcpy (m_SigningPrivateKey, buf + ret, m_TransientSigningPrivateKeyLen);
|
|
ret += m_TransientSigningPrivateKeyLen;
|
|
CreateSigner (keyType);
|
|
}
|
|
else
|
|
CreateSigner (m_Public->GetSigningKeyType ());
|
|
return ret;
|
|
}
|
|
|
|
size_t PrivateKeys::ToBuffer (uint8_t * buf, size_t len) const
|
|
{
|
|
size_t ret = m_Public->ToBuffer (buf, len);
|
|
auto cryptoKeyLen = GetPrivateKeyLen ();
|
|
memcpy (buf + ret, m_PrivateKey, cryptoKeyLen);
|
|
ret += cryptoKeyLen;
|
|
size_t signingPrivateKeySize = m_Public->GetSigningPrivateKeyLen ();
|
|
if(ret + signingPrivateKeySize > len) return 0; // overflow
|
|
if (IsOfflineSignature ())
|
|
memset (buf + ret, 0, signingPrivateKeySize);
|
|
else
|
|
memcpy (buf + ret, m_SigningPrivateKey, signingPrivateKeySize);
|
|
ret += signingPrivateKeySize;
|
|
if (IsOfflineSignature ())
|
|
{
|
|
// offline signature
|
|
auto offlineSignatureLen = m_OfflineSignature.size ();
|
|
if (ret + offlineSignatureLen > len) return 0;
|
|
memcpy (buf + ret, m_OfflineSignature.data (), offlineSignatureLen);
|
|
ret += offlineSignatureLen;
|
|
// transient private key
|
|
if (ret + m_TransientSigningPrivateKeyLen > len) return 0;
|
|
memcpy (buf + ret, m_SigningPrivateKey, m_TransientSigningPrivateKeyLen);
|
|
ret += m_TransientSigningPrivateKeyLen;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
size_t PrivateKeys::FromBase64(const std::string& s)
|
|
{
|
|
uint8_t * buf = new uint8_t[s.length ()];
|
|
size_t l = i2p::data::Base64ToByteStream (s.c_str (), s.length (), buf, s.length ());
|
|
size_t ret = FromBuffer (buf, l);
|
|
delete[] buf;
|
|
return ret;
|
|
}
|
|
|
|
std::string PrivateKeys::ToBase64 () const
|
|
{
|
|
uint8_t * buf = new uint8_t[GetFullLen ()];
|
|
char * str = new char[GetFullLen ()*2];
|
|
size_t l = ToBuffer (buf, GetFullLen ());
|
|
size_t l1 = i2p::data::ByteStreamToBase64 (buf, l, str, GetFullLen ()*2);
|
|
str[l1] = 0;
|
|
delete[] buf;
|
|
std::string ret(str);
|
|
delete[] str;
|
|
return ret;
|
|
}
|
|
|
|
void PrivateKeys::Sign (const uint8_t * buf, int len, uint8_t * signature) const
|
|
{
|
|
if (!m_Signer)
|
|
CreateSigner();
|
|
m_Signer->Sign (buf, len, signature);
|
|
}
|
|
|
|
void PrivateKeys::CreateSigner () const
|
|
{
|
|
if (IsOfflineSignature ())
|
|
CreateSigner (bufbe16toh (m_OfflineSignature.data () + 4)); // key type
|
|
else
|
|
CreateSigner (m_Public->GetSigningKeyType ());
|
|
}
|
|
|
|
void PrivateKeys::CreateSigner (SigningKeyType keyType) const
|
|
{
|
|
if (m_Signer) return;
|
|
if (keyType == SIGNING_KEY_TYPE_DSA_SHA1)
|
|
m_Signer.reset (new i2p::crypto::DSASigner (m_SigningPrivateKey, m_Public->GetStandardIdentity ().signingKey));
|
|
else if (keyType == SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519 && !IsOfflineSignature ())
|
|
m_Signer.reset (new i2p::crypto::EDDSA25519Signer (m_SigningPrivateKey, m_Public->GetStandardIdentity ().certificate - i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH)); // TODO: remove public key check
|
|
else
|
|
{
|
|
// public key is not required
|
|
auto signer = CreateSigner (keyType, m_SigningPrivateKey);
|
|
if (signer) m_Signer.reset (signer);
|
|
}
|
|
}
|
|
|
|
i2p::crypto::Signer * PrivateKeys::CreateSigner (SigningKeyType keyType, const uint8_t * priv)
|
|
{
|
|
switch (keyType)
|
|
{
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
|
|
return new i2p::crypto::ECDSAP256Signer (priv);
|
|
break;
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
|
|
return new i2p::crypto::ECDSAP384Signer (priv);
|
|
break;
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
|
|
return new i2p::crypto::ECDSAP521Signer (priv);
|
|
break;
|
|
case SIGNING_KEY_TYPE_RSA_SHA256_2048:
|
|
case SIGNING_KEY_TYPE_RSA_SHA384_3072:
|
|
case SIGNING_KEY_TYPE_RSA_SHA512_4096:
|
|
LogPrint (eLogError, "Identity: RSA signing key type ", (int)keyType, " is not supported");
|
|
break;
|
|
case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
|
|
return new i2p::crypto::EDDSA25519Signer (priv, nullptr);
|
|
break;
|
|
case SIGNING_KEY_TYPE_GOSTR3410_CRYPTO_PRO_A_GOSTR3411_256:
|
|
return new i2p::crypto::GOSTR3410_256_Signer (i2p::crypto::eGOSTR3410CryptoProA, priv);
|
|
break;
|
|
case SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512:
|
|
return new i2p::crypto::GOSTR3410_512_Signer (i2p::crypto::eGOSTR3410TC26A512, priv);
|
|
break;
|
|
case SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519:
|
|
return new i2p::crypto::RedDSA25519Signer (priv);
|
|
break;
|
|
default:
|
|
LogPrint (eLogError, "Identity: Signing key type ", (int)keyType, " is not supported");
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
size_t PrivateKeys::GetSignatureLen () const
|
|
{
|
|
return IsOfflineSignature () ? m_TransientSignatureLen : m_Public->GetSignatureLen ();
|
|
}
|
|
|
|
size_t PrivateKeys::GetPrivateKeyLen () const
|
|
{
|
|
// private key length always 256, but type 4
|
|
return (m_Public->GetCryptoKeyType () == CRYPTO_KEY_TYPE_ECIES_X25519_AEAD) ? 32 : 256;
|
|
}
|
|
|
|
uint8_t * PrivateKeys::GetPadding()
|
|
{
|
|
if(m_Public->GetSigningKeyType () == SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519)
|
|
return m_Public->GetEncryptionPublicKeyBuffer() + 256;
|
|
else
|
|
return nullptr; // TODO: implement me
|
|
}
|
|
|
|
std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> PrivateKeys::CreateDecryptor (const uint8_t * key) const
|
|
{
|
|
if (!key) key = m_PrivateKey; // use privateKey
|
|
return CreateDecryptor (m_Public->GetCryptoKeyType (), key);
|
|
}
|
|
|
|
std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> PrivateKeys::CreateDecryptor (CryptoKeyType cryptoType, const uint8_t * key)
|
|
{
|
|
if (!key) return nullptr;
|
|
switch (cryptoType)
|
|
{
|
|
case CRYPTO_KEY_TYPE_ELGAMAL:
|
|
return std::make_shared<i2p::crypto::ElGamalDecryptor>(key);
|
|
break;
|
|
case CRYPTO_KEY_TYPE_ECIES_X25519_AEAD:
|
|
return std::make_shared<i2p::crypto::ECIESX25519AEADRatchetDecryptor>(key);
|
|
break;
|
|
case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC:
|
|
case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC_TEST:
|
|
return std::make_shared<i2p::crypto::ECIESP256Decryptor>(key);
|
|
break;
|
|
case CRYPTO_KEY_TYPE_ECIES_GOSTR3410_CRYPTO_PRO_A_SHA256_AES256CBC:
|
|
return std::make_shared<i2p::crypto::ECIESGOSTR3410Decryptor>(key);
|
|
break;
|
|
default:
|
|
LogPrint (eLogError, "Identity: Unknown crypto key type ", (int)cryptoType);
|
|
};
|
|
return nullptr;
|
|
}
|
|
|
|
PrivateKeys PrivateKeys::CreateRandomKeys (SigningKeyType type, CryptoKeyType cryptoType, bool isDestination)
|
|
{
|
|
if (type != SIGNING_KEY_TYPE_DSA_SHA1)
|
|
{
|
|
PrivateKeys keys;
|
|
// signature
|
|
uint8_t signingPublicKey[512]; // signing public key is 512 bytes max
|
|
GenerateSigningKeyPair (type, keys.m_SigningPrivateKey, signingPublicKey);
|
|
// encryption
|
|
uint8_t publicKey[256];
|
|
if (isDestination)
|
|
RAND_bytes (keys.m_PrivateKey, 256);
|
|
else
|
|
GenerateCryptoKeyPair (cryptoType, keys.m_PrivateKey, publicKey);
|
|
// identity
|
|
keys.m_Public = std::make_shared<IdentityEx> (isDestination ? nullptr : publicKey, signingPublicKey, type, cryptoType);
|
|
|
|
keys.CreateSigner ();
|
|
return keys;
|
|
}
|
|
return PrivateKeys (i2p::data::CreateRandomKeys ()); // DSA-SHA1
|
|
}
|
|
|
|
void PrivateKeys::GenerateSigningKeyPair (SigningKeyType type, uint8_t * priv, uint8_t * pub)
|
|
{
|
|
switch (type)
|
|
{
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
|
|
i2p::crypto::CreateECDSAP256RandomKeys (priv, pub);
|
|
break;
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
|
|
i2p::crypto::CreateECDSAP384RandomKeys (priv, pub);
|
|
break;
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
|
|
i2p::crypto::CreateECDSAP521RandomKeys (priv, pub);
|
|
break;
|
|
case SIGNING_KEY_TYPE_RSA_SHA256_2048:
|
|
case SIGNING_KEY_TYPE_RSA_SHA384_3072:
|
|
case SIGNING_KEY_TYPE_RSA_SHA512_4096:
|
|
LogPrint (eLogWarning, "Identity: RSA signature type is not supported. Creating EdDSA");
|
|
#if (__cplusplus >= 201703L) // C++ 17 or higher
|
|
[[fallthrough]];
|
|
#endif
|
|
// no break here
|
|
case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
|
|
i2p::crypto::CreateEDDSA25519RandomKeys (priv, pub);
|
|
break;
|
|
case SIGNING_KEY_TYPE_GOSTR3410_CRYPTO_PRO_A_GOSTR3411_256:
|
|
i2p::crypto::CreateGOSTR3410RandomKeys (i2p::crypto::eGOSTR3410CryptoProA, priv, pub);
|
|
break;
|
|
case SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512:
|
|
i2p::crypto::CreateGOSTR3410RandomKeys (i2p::crypto::eGOSTR3410TC26A512, priv, pub);
|
|
break;
|
|
case SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519:
|
|
i2p::crypto::CreateRedDSA25519RandomKeys (priv, pub);
|
|
break;
|
|
default:
|
|
LogPrint (eLogWarning, "Identity: Signing key type ", (int)type, " is not supported. Create DSA-SHA1");
|
|
i2p::crypto::CreateDSARandomKeys (priv, pub); // DSA-SHA1
|
|
}
|
|
}
|
|
|
|
void PrivateKeys::GenerateCryptoKeyPair (CryptoKeyType type, uint8_t * priv, uint8_t * pub)
|
|
{
|
|
switch (type)
|
|
{
|
|
case CRYPTO_KEY_TYPE_ELGAMAL:
|
|
i2p::crypto::GenerateElGamalKeyPair(priv, pub);
|
|
break;
|
|
case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC:
|
|
case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC_TEST:
|
|
i2p::crypto::CreateECIESP256RandomKeys (priv, pub);
|
|
break;
|
|
case CRYPTO_KEY_TYPE_ECIES_GOSTR3410_CRYPTO_PRO_A_SHA256_AES256CBC:
|
|
i2p::crypto::CreateECIESGOSTR3410RandomKeys (priv, pub);
|
|
break;
|
|
case CRYPTO_KEY_TYPE_ECIES_X25519_AEAD:
|
|
i2p::crypto::CreateECIESX25519AEADRatchetRandomKeys (priv, pub);
|
|
break;
|
|
default:
|
|
LogPrint (eLogError, "Identity: Crypto key type ", (int)type, " is not supported");
|
|
}
|
|
}
|
|
|
|
PrivateKeys PrivateKeys::CreateOfflineKeys (SigningKeyType type, uint32_t expires) const
|
|
{
|
|
PrivateKeys keys (*this);
|
|
std::unique_ptr<i2p::crypto::Verifier> verifier (IdentityEx::CreateVerifier (type));
|
|
if (verifier)
|
|
{
|
|
size_t pubKeyLen = verifier->GetPublicKeyLen ();
|
|
keys.m_TransientSigningPrivateKeyLen = verifier->GetPrivateKeyLen ();
|
|
keys.m_TransientSignatureLen = verifier->GetSignatureLen ();
|
|
keys.m_OfflineSignature.resize (pubKeyLen + m_Public->GetSignatureLen () + 6);
|
|
htobe32buf (keys.m_OfflineSignature.data (), expires); // expires
|
|
htobe16buf (keys.m_OfflineSignature.data () + 4, type); // type
|
|
GenerateSigningKeyPair (type, keys.m_SigningPrivateKey, keys.m_OfflineSignature.data () + 6); // public key
|
|
Sign (keys.m_OfflineSignature.data (), pubKeyLen + 6, keys.m_OfflineSignature.data () + 6 + pubKeyLen); // signature
|
|
// recreate signer
|
|
keys.m_Signer = nullptr;
|
|
keys.CreateSigner (type);
|
|
}
|
|
return keys;
|
|
}
|
|
|
|
Keys CreateRandomKeys ()
|
|
{
|
|
Keys keys;
|
|
// encryption
|
|
i2p::crypto::GenerateElGamalKeyPair(keys.privateKey, keys.publicKey);
|
|
// signing
|
|
i2p::crypto::CreateDSARandomKeys (keys.signingPrivateKey, keys.signingKey);
|
|
return keys;
|
|
}
|
|
|
|
IdentHash CreateRoutingKey (const IdentHash& ident)
|
|
{
|
|
uint8_t buf[41]; // ident + yyyymmdd
|
|
memcpy (buf, (const uint8_t *)ident, 32);
|
|
i2p::util::GetCurrentDate ((char *)(buf + 32));
|
|
IdentHash key;
|
|
SHA256(buf, 40, key);
|
|
return key;
|
|
}
|
|
|
|
XORMetric operator^(const IdentHash& key1, const IdentHash& key2)
|
|
{
|
|
XORMetric m;
|
|
#if (defined(__x86_64__) || defined(__i386__)) && defined(__AVX__) // not all X86 targets supports AVX (like old Pentium, see #1600)
|
|
if(i2p::cpu::avx)
|
|
{
|
|
__asm__
|
|
(
|
|
"vmovups %1, %%ymm0 \n"
|
|
"vmovups %2, %%ymm1 \n"
|
|
"vxorps %%ymm0, %%ymm1, %%ymm1 \n"
|
|
"vmovups %%ymm1, %0 \n"
|
|
: "=m"(*m.metric)
|
|
: "m"(*key1), "m"(*key2)
|
|
: "memory", "%xmm0", "%xmm1" // should be replaced by %ymm0/1 once supported by compiler
|
|
);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
const uint64_t * hash1 = key1.GetLL (), * hash2 = key2.GetLL ();
|
|
m.metric_ll[0] = hash1[0] ^ hash2[0];
|
|
m.metric_ll[1] = hash1[1] ^ hash2[1];
|
|
m.metric_ll[2] = hash1[2] ^ hash2[2];
|
|
m.metric_ll[3] = hash1[3] ^ hash2[3];
|
|
}
|
|
|
|
return m;
|
|
}
|
|
}
|
|
}
|