149 lines
3.6 KiB
C++
149 lines
3.6 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: ECCx25519Public.cpp
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Date: 2021-9-17
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "ECC.hpp"
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#include "ECCX25519Public.hpp"
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namespace Aurora::Crypto::ECC
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{
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PublicCurve25519Impl::PublicCurve25519Impl(bool isX25519, curve25519_key &&key) : key_(key), bIsX25519_(isX25519)
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{
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}
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PublicCurve25519Impl::~PublicCurve25519Impl()
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{
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}
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bool PublicCurve25519Impl::Verify(const Memory::MemoryViewRead &hash,
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const Memory::MemoryViewRead &signature)
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{
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int ok = 0;
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if (this->bIsX25519_)
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{
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return false;
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}
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if (!hash.HasMemory())
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{
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SysPushErrorParam();
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return {};
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}
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if (!signature.HasMemory())
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{
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SysPushErrorParam();
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return {};
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}
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auto iRet = ed25519_verify(AuReinterpretCast<const unsigned char *>(hash.ptr), hash.length,
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AuReinterpretCast<const unsigned char *>(signature.ptr), signature.length,
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&ok, &key_);
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if (iRet != CRYPT_OK)
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{
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SysPushErrorCrypt("{}", iRet);
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return false;
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}
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return ok == 1;
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}
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bool PublicCurve25519Impl::Verify(const Memory::MemoryViewRead &plaintext,
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const Memory::MemoryViewRead &signature,
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AuHashing::EHashType method)
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{
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if (this->bIsX25519_)
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{
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return false;
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}
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if (!plaintext.HasMemory())
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{
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SysPushErrorParam();
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return {};
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}
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if (!signature.HasMemory())
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{
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SysPushErrorParam();
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return {};
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}
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int hash = ::Crypto::HashMethodToId(method);
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if (hash == 0xFF)
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{
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SysPushErrorCrypt("invalid hash {}", AuUInt(method));
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return false;
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}
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AuByteBuffer hashVec;
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if (!AuTryResize(hashVec, 128))
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{
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SysPushErrorMem();
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return false;
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}
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unsigned long hashSize = hashVec.size();
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auto iRet = hash_memory(hash,
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AuReinterpretCast<const unsigned char *>(plaintext.ptr), plaintext.length,
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AuReinterpretCast<unsigned char *>(hashVec.data()), &hashSize);
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if (iRet != CRYPT_OK)
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{
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SysPushErrorCrypt("{}", iRet);
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return false;
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}
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return Verify({hashVec}, signature);
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}
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bool PublicCurve25519Impl::AsPublicECC(Memory::ByteBuffer &out)
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{
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auto writeView = out.GetOrAllocateLinearWriteable(4096);
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if (!writeView)
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{
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SysPushErrorMem();
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return {};
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}
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unsigned long actualSize;
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int ret;
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actualSize = 4096;
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if (this->bIsX25519_)
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{
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ret = ::x25519_export(out.writePtr, &actualSize, PK_PUBLIC | PK_STD, &this->key_);
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}
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else
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{
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ret = ::ed25519_export(out.writePtr, &actualSize, PK_PUBLIC | PK_STD, &this->key_);
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}
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if (ret != CRYPT_OK)
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{
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SysPushErrorCrypt("{}", ret);
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return false;
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}
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out.writePtr += actualSize;
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return true;
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}
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EECCCurve PublicCurve25519Impl::GetType()
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{
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return this->bIsX25519_ ? EECCCurve::eCurveX25519 : EECCCurve::eCurveEd25519;
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}
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const curve25519_key &PublicCurve25519Impl::GetKey()
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{
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return this->key_;
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}
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}
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