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#include "../include/Signature.hpp"
#include <sodium/crypto_sign_ed25519.h>
#include <sodium/utils.h>
#include <cstring>
using namespace std;
namespace odhtdb
{
namespace Signature
{
PublicKey::PublicKey(char *_data, size_t size)
{
if(size != PUBLIC_KEY_NUM_BYTES)
{
string errMsg = "Expected public key size to be ";
errMsg += to_string(PUBLIC_KEY_NUM_BYTES);
errMsg += " bytes, was: ";
errMsg += to_string(size);
throw InvalidSignatureKeySize(errMsg);
}
memmove(data, _data, PUBLIC_KEY_NUM_BYTES);
}
PublicKey::PublicKey(const PublicKey &other)
{
memmove(data, other.data, PUBLIC_KEY_NUM_BYTES);
}
PublicKey& PublicKey::operator=(const PublicKey &other)
{
memmove(data, other.data, PUBLIC_KEY_NUM_BYTES);
return *this;
}
string PublicKey::toString() const
{
string result;
result.resize(PUBLIC_KEY_NUM_BYTES * 2);
sodium_bin2hex(&result[0], PUBLIC_KEY_NUM_BYTES * 2 + 1, (const unsigned char*)data, PUBLIC_KEY_NUM_BYTES);
return result;
}
PrivateKey::PrivateKey(char *_data, size_t size)
{
if(size != PRIVATE_KEY_NUM_BYTES)
{
string errMsg = "Expected private key size to be ";
errMsg += to_string(PRIVATE_KEY_NUM_BYTES);
errMsg += " bytes, was: ";
errMsg += to_string(size);
throw InvalidSignatureKeySize(errMsg);
}
memmove(data, _data, PRIVATE_KEY_NUM_BYTES);
}
PrivateKey::PrivateKey(const PrivateKey &other)
{
memmove(data, other.data, PRIVATE_KEY_NUM_BYTES);
}
PrivateKey& PrivateKey::operator=(const PrivateKey &other)
{
memmove(data, other.data, PRIVATE_KEY_NUM_BYTES);
return *this;
}
string PrivateKey::sign(const string &dataToSign) const
{
string result;
result.resize(crypto_sign_ed25519_BYTES + dataToSign.size());
unsigned long long resultSize;
if(crypto_sign_ed25519((unsigned char*)&result[0], &resultSize, (unsigned char*)dataToSign.data(), dataToSign.size(), (unsigned char*)data) != 0)
throw DataSignException("Failed to sign data. Is private key invalid?");
if(resultSize != result.size())
throw DataSignException("Failed to sign data. The signed data is not of expected size (bug)");
return result;
}
string PrivateKey::toString() const
{
string result;
result.resize(PRIVATE_KEY_NUM_BYTES * 2);
sodium_bin2hex(&result[0], PRIVATE_KEY_NUM_BYTES * 2 + 1, (const unsigned char*)data, PRIVATE_KEY_NUM_BYTES);
return result;
}
KeyPair::KeyPair()
{
if(crypto_sign_ed25519_keypair((unsigned char*)publicKey.data, (unsigned char*)privateKey.data) != 0)
throw SignatureGenerationException("Failed to generate signature keypair");
}
}
}
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