int main(int argc, char *argv[])
{
// Key and 16 byte block as per FIPS 197, Appendix B (Cipher Example)
byte_ard pKey[] = {
0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c
};
// The ciphertext according to the FIPS and block_e.cpp
byte_ard pCipherBlock[] = {
0x39, 0x25, 0x84, 0x1d, 0x02, 0xdc, 0x09, 0xfb, 0xdc, 0x11, 0x85, 0x97, 0x19, 0x6a, 0x0b, 0x32
};
// Allocate memory and generate the key schedule
byte_ard pKeys[KEY_BYTES*12];
KeyExpansion(pKey, pKeys);
printf("\nCiphertext: \n");
printBytes2((unsigned char *)pCipherBlock, BLOCK_SIZE);
#ifdef print_key_schedule
printf("\nKey Schdedule: \n");
printBytes2((unsigned char *)pKeys, BLOCK_SIZE*11);
printf("\n");
#endif
// Decrypt the single block
DecryptBlock(pCipherBlock, (const u_int32_ard*)pKeys);
printf("\nPlaintext: \n");
printBytes2((unsigned char *)pCipherBlock, BLOCK_SIZE);
return 0;
}
std::vector<char> Blowfish::Decrypt(const std::vector<char> &src) const {
std::vector<char> dst = src;
for (int i = 0; i < dst.size() / sizeof(uint64_t); ++i) {
uint32_t *left = &reinterpret_cast<uint32_t *>(dst.data())[i * 2];
uint32_t *right = &reinterpret_cast<uint32_t *>(dst.data())[i * 2 + 1];
DecryptBlock(left, right);
}
size_t padding_length = PKCS5PaddingLength(dst);
dst.resize(dst.size() - padding_length);
return dst;
}
void Blowfish::Decrypt(unsigned char* dst, const unsigned char* src, int byte_length) const
{
if (dst != src)
{
memcpy(dst, src, byte_length);
}
for (int i = 0; i < byte_length / sizeof(uint64_t); ++i)
{
uint32_t* left = &reinterpret_cast<uint32_t*>(dst)[i * 2];
uint32_t* right = &reinterpret_cast<uint32_t*>(dst)[i * 2 + 1];
DecryptBlock(left, right);
}
}
// CBCDecrypt()
//
// C_0 = IV
// P_i = D_k(C_i) XOR C_{i-1}
//
// Removing the padding probably isnt neccesary, since the CBC
// leaves the null char intact at the end of the cstring. But what
// about binary files and etc?
void CBCDecrypt(void* pText, void* pBuffer, u_int32_ard length,
const u_int32_ard *pKeys, const u_int16_ard *pIV)
{
byte_ard *cText = (byte_ard*)pText;
byte_ard *cBuffer = (byte_ard*)pBuffer;
byte_ard lastblock[BLOCK_BYTE_SIZE];
byte_ard tempblock[BLOCK_BYTE_SIZE];
byte_ard currblock[BLOCK_BYTE_SIZE];
u_int32_ard blocks = length/BLOCK_BYTE_SIZE;
memcpy(lastblock,pIV,BLOCK_BYTE_SIZE);
for (u_int32_ard i = 0; i < blocks; i++)
{
#if defined(unroll_cbc_decrypt_loop)
currblock[0] = cText[(i*BLOCK_BYTE_SIZE)+0];
tempblock[0] = currblock[0];
currblock[1] = cText[(i*BLOCK_BYTE_SIZE)+1];
tempblock[1] = currblock[1];
currblock[2] = cText[(i*BLOCK_BYTE_SIZE)+2];
tempblock[2] = currblock[2];
currblock[3] = cText[(i*BLOCK_BYTE_SIZE)+3];
tempblock[3] = currblock[3];
currblock[4] = cText[(i*BLOCK_BYTE_SIZE)+4];
tempblock[4] = currblock[4];
currblock[5] = cText[(i*BLOCK_BYTE_SIZE)+5];
tempblock[5] = currblock[5];
currblock[6] = cText[(i*BLOCK_BYTE_SIZE)+6];
tempblock[6] = currblock[6];
currblock[7] = cText[(i*BLOCK_BYTE_SIZE)+7];
tempblock[7] = currblock[7];
currblock[8] = cText[(i*BLOCK_BYTE_SIZE)+8];
tempblock[8] = currblock[8];
currblock[9] = cText[(i*BLOCK_BYTE_SIZE)+9];
tempblock[9] = currblock[9];
currblock[10] = cText[(i*BLOCK_BYTE_SIZE)+10];
tempblock[10] = currblock[10];
currblock[11] = cText[(i*BLOCK_BYTE_SIZE)+11];
tempblock[11] = currblock[11];
currblock[12] = cText[(i*BLOCK_BYTE_SIZE)+12];
tempblock[12] = currblock[12];
currblock[13] = cText[(i*BLOCK_BYTE_SIZE)+13];
tempblock[13] = currblock[13];
currblock[14] = cText[(i*BLOCK_BYTE_SIZE)+14];
tempblock[14] = currblock[14];
currblock[15] = cText[(i*BLOCK_BYTE_SIZE)+15];
tempblock[15] = currblock[15];
DecryptBlock((void*)currblock, pKeys);
cBuffer[(i*BLOCK_BYTE_SIZE)+0] = currblock[0] ^ lastblock[0];
lastblock[0] = tempblock[0];
cBuffer[(i*BLOCK_BYTE_SIZE)+1] = currblock[1] ^ lastblock[1];
lastblock[1] = tempblock[1];
cBuffer[(i*BLOCK_BYTE_SIZE)+2] = currblock[2] ^ lastblock[2];
lastblock[2] = tempblock[2];
cBuffer[(i*BLOCK_BYTE_SIZE)+3] = currblock[3] ^ lastblock[3];
lastblock[3] = tempblock[3];
cBuffer[(i*BLOCK_BYTE_SIZE)+4] = currblock[4] ^ lastblock[4];
lastblock[4] = tempblock[4];
cBuffer[(i*BLOCK_BYTE_SIZE)+5] = currblock[5] ^ lastblock[5];
lastblock[5] = tempblock[5];
cBuffer[(i*BLOCK_BYTE_SIZE)+6] = currblock[6] ^ lastblock[6];
lastblock[6] = tempblock[6];
cBuffer[(i*BLOCK_BYTE_SIZE)+7] = currblock[7] ^ lastblock[7];
lastblock[7] = tempblock[7];
cBuffer[(i*BLOCK_BYTE_SIZE)+8] = currblock[8] ^ lastblock[8];
lastblock[8] = tempblock[8];
cBuffer[(i*BLOCK_BYTE_SIZE)+9] = currblock[9] ^ lastblock[9];
lastblock[9] = tempblock[9];
cBuffer[(i*BLOCK_BYTE_SIZE)+10] = currblock[10] ^ lastblock[10];
lastblock[10] = tempblock[10];
cBuffer[(i*BLOCK_BYTE_SIZE)+11] = currblock[11] ^ lastblock[11];
lastblock[11] = tempblock[11];
cBuffer[(i*BLOCK_BYTE_SIZE)+12] = currblock[12] ^ lastblock[12];
lastblock[12] = tempblock[12];
cBuffer[(i*BLOCK_BYTE_SIZE)+13] = currblock[13] ^ lastblock[13];
lastblock[13] = tempblock[13];
cBuffer[(i*BLOCK_BYTE_SIZE)+14] = currblock[14] ^ lastblock[14];
lastblock[14] = tempblock[14];
cBuffer[(i*BLOCK_BYTE_SIZE)+15] = currblock[15] ^ lastblock[15];
lastblock[15] = tempblock[15];
#else
// copy the data to 'currblock', to be deciphered.
for (u_int16_ard j = 0; j < BLOCK_BYTE_SIZE; j++)
{
currblock[j] = cText[(i*BLOCK_BYTE_SIZE)+j];
tempblock[j] = currblock[j];
}
DecryptBlock((void*)currblock, pKeys);
// xor the decphered block with last latest cipherblock, C_{i-1}
for (u_int16_ard j = 0; j < BLOCK_BYTE_SIZE; j++)
{
cBuffer[(i*BLOCK_BYTE_SIZE)+j] = currblock[j] ^ lastblock[j];
lastblock[j] = tempblock[j];
}
#endif
}
} // CBCDecrypt()
// 解密PNG图片
void DecryptPNG(const std::vector<std::string> &filelist, const aes_key &key)
{
for (auto &filename : filelist)
{
std::ifstream in_file(filename, std::ios::binary | std::ios::ate);
if (!in_file.is_open())
{
std::cerr << "打开" << filename << " 失败！" << std::endl;
return;
}
// 读取数据块位置
uint64_t end_pos = in_file.tellg();
in_file.seekg(end_pos - sizeof(uint64_t));
uint64_t block_start_pos = *reinterpret_cast<uint64_t *>(&(ReadSome<sizeof(uint64_t)>(in_file)[0]));
in_file.seekg(block_start_pos);
// 解密数据块信息
auto block_info = ReadLarge(in_file, uint32_t(end_pos - sizeof(uint64_t) - block_start_pos));
DecryptBlock(block_info, key);
// 验证数据块内容
auto block_head = ReadSome<sizeof(BLOCK_HEAD)>(block_info);
for (unsigned int i = 0; i < block_head.size(); ++i)
{
if (block_head[i] != BLOCK_HEAD[i])
{
std::cerr << "密钥错误，解密" << filename << " 失败！" << std::endl;
return;
}
}
std::ofstream out_file(path::splitext(filename)[0] + ".png", std::ios::binary);
if (!out_file.is_open())
{
std::cerr << "创建" << path::splitext(filename)[1] << ".png" << " 失败！" << std::endl;
continue;
}
// 写入文件头
WriteToSteam(HEAD_DATA, sizeof(HEAD_DATA), out_file);
// 读取数据块
uint64_t read_size = 0;
while (true)
{
// 读取数据块信息
Block block;
memcpy(&block, &ReadSome<sizeof(Block)>(block_info)[0], sizeof(Block));
if (block_info.eof())
{
out_file.clear();
std::cerr << "the %s file format error!" << std::endl;
break;
}
// 写入数据块长度
char reverse_size[sizeof(block.size)];
memcpy(reverse_size, &block.size, sizeof(reverse_size));
std::reverse(reverse_size, reverse_size + sizeof(reverse_size));
WriteToSteam(reverse_size, sizeof(reverse_size), out_file);
// 写入数据块名称
WriteToSteam(&block.name, sizeof(block.name), out_file);
// 写入数据块内容
std::string s_name(block.name, sizeof(block.name));
if (strcmp(s_name.c_str(), "IHDR") == 0)
{
IHDRBlock ihdr;
memcpy(&ihdr, &block, sizeof(Block));
memcpy(((char *)&ihdr) + sizeof(Block), &ReadSome<sizeof(IHDRBlock) - sizeof(Block)>(block_info)[0], sizeof(IHDRBlock) - sizeof(Block));
WriteToSteam(ihdr.data, sizeof(ihdr.data), out_file);
}
else if (strcmp(s_name.c_str(), "IEND") == 0)
{
WriteToSteam(IEND_DATA, sizeof(IEND_DATA), out_file);
std::cout << "成功解密：" << filename << std::endl;
break;
}
else
{
in_file.seekg(read_size);
StreamMove(out_file, in_file, block.size + CRC_SIZE);
read_size += block.size + CRC_SIZE;
}
}
}
}
void Cbc512NoPaddingCryptoProvider::Decrypt(const uint8_t *pbIn,
uint32_t cbInUnsafe,
uint32_t dwStartingBlockNumberUnsafe,
bool isFinal,
uint8_t *pbOut,
uint32_t cbOutUnsafe,
uint32_t *pcbOut)
{
auto cbIn = cbInUnsafe, cbOut = cbOutUnsafe,
dwStartingBlockNumber = dwStartingBlockNumberUnsafe;
if (pbIn == nullptr) {
throw exceptions::RMSCryptoNullPointerException("Null pointer pbIn exception");
}
if (!isFinal && (0 != cbIn % CBC512_BLOCK_SIZE)) {
throw exceptions::RMSCryptoInvalidArgumentException("Block is not aligned");
}
if (0 != cbIn % AES128_BLOCK_SIZE) {
throw exceptions::RMSCryptoInvalidArgumentException("Block is not aligned");
}
if (nullptr == pcbOut) {
throw exceptions::RMSCryptoNullPointerException("Null pointer pcbOut exception");
}
if (nullptr == pbOut)
{
// No need to do the decryption, just return the number of bytes required
*pcbOut = cbIn;
return;
}
if ((cbIn % AES128_BLOCK_SIZE) != 0) {
throw exceptions::RMSCryptoInvalidArgumentException("Block is not aligned");
}
if (nullptr == pbOut)
{
// No need to do the decryption, just return the number of uint8_ts required
*pcbOut = cbIn;
return;
}
if (cbOut < cbIn) {
throw exceptions::RMSCryptoInsufficientBufferException("Insufficient buffer");
}
auto cbResult = 0;
while (cbIn >= CBC512_BLOCK_SIZE)
{
if (cbOut < CBC512_BLOCK_SIZE) {
throw exceptions::RMSCryptoInsufficientBufferException("Insufficient buffer");
}
DecryptBlock(pbIn,
CBC512_BLOCK_SIZE,
dwStartingBlockNumber,
false,
pbOut,
cbOut);
pbIn += CBC512_BLOCK_SIZE;
cbIn -= CBC512_BLOCK_SIZE;
pbOut += CBC512_BLOCK_SIZE;
cbOut -= CBC512_BLOCK_SIZE;
++dwStartingBlockNumber;
cbResult += CBC512_BLOCK_SIZE;
}
if (!isFinal && (cbIn != 0)) {
throw exceptions::RMSCryptoInvalidArgumentException("Invalid aligment");
}
if (isFinal && (cbIn > 0))
{
// Note that the cbIn can't be 0, the final block always should have at
// least AES128_BLOCK_SIZE (16) uint8_ts
if (cbIn < AES128_BLOCK_SIZE) {
throw exceptions::RMSCryptoInsufficientBufferException("Insufficient buffer");
}
cbResult +=
DecryptBlock(pbIn, cbIn, dwStartingBlockNumber, true, pbOut, cbOut);
}
*pcbOut = cbResult;
}
void
LRWMode::Decrypt(ThreadContext& context, uint8 *data, size_t length)
{
DecryptBlock(context, data, length, fOffset);
}
void
XTSMode::Decrypt(ThreadContext& context, uint8 *data, size_t length)
{
DecryptBlock(context, data, length, 0);
}
void RX_ISR(void)
{
received = U1ARXREG;
PORTD = 2;
if(received == 10)
{
i = 0;
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -2;
}
TMR2 = 0;
while(username[i] != NULL)
{
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = username[i];
}
i++;
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -2;
}
}
DelayMsec(5000);
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -3;
}
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -2;
}
i = 0;
while(password[i] != NULL)
{
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = password[i];
}
i++;
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -2;
}
}
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -3;
}
}
else if(received == -7)
{
if(receive_user == -1)
receive_user = 1;
else if(receive_user == 1)
receive_user = 0;
else
receive_user = -1;
i = 0;
}
else if(received == -4)
{
receive_file = 1;
file_pt = 0;
}
else if(received == -5)
{
receive_file = 0;
file_pt = 0;
//BYTE Key[2] = {'1','2'};
BYTE RoundKey[6];
Extend_Key(Key,RoundKey);
while(file[file_pt] != NULL)
{
BYTE temp[2];
BYTE temp_result[2];
temp[0] = file[file_pt];
temp[1] = file[file_pt+1];
EncryptBlock(temp,RoundKey,temp_result);
result[file_pt] = temp_result[0];
result[file_pt+1] = temp_result[1];
file_pt = file_pt + 2;
}
file_pt = 0;
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -2;
}
while(result[file_pt] != NULL)
{
char to_send = result[file_pt];
file_pt++;
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = to_send;
}
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -2;
}
}
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -3;
}
file_pt = 0;
}
else if(received == -6)
{
receive_file = 0;
file_pt = 0;
//BYTE Key[2] = {'1','2'};
BYTE RoundKey[6];
Extend_Key(Key,RoundKey);
while(file[file_pt] != NULL)
{
BYTE temp[2];
BYTE temp_result[2];
temp_result[0] = file[file_pt];
temp_result[1] = file[file_pt+1];
DecryptBlock(temp_result,RoundKey,temp);
file[file_pt] = temp[0];
file[file_pt+1] = temp[1];
file_pt = file_pt + 2;
}
file_pt = 0;
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -2;
}
while(file[file_pt] != NULL)
{
char to_send = file[file_pt];
file_pt++;
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = to_send;
}
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -2;
}
}
TMR2 = 0;
while(TMR2 < 400)
{
U1ATXREG = -3;
}
file_pt = 0;
}
if(receive_file == 1 && received != -4 && received != -5)
{
file[file_pt] = received;
file_pt ++;
}
if(receive_user == 1 && received != -7)
{
username[i] = received;
i++;
}
else if(receive_user == 0 && received != -7)
{
password[i] = received;
i++;
}
PORTDINV = 2;
IFS0bits.U1RXIF = 0;
}