C/C++ Crypto密码库调用的实现方法

 #include  #include  #include  #include  #include  #include  #include  #include  #pragma comment(lib, "cryptlib.lib") using namespace std; using namespace CryptoPP; // 计算文件的 SHA256 值 string CalSHA256_ByFile(char *pszFileName) { string value; SHA256 sha256; FileSource(pszFileName, true, new HashFilter(sha256, new HexEncoder(new StringSink(value)))); return value; } // 计算数据的 SHA256 值 string CalSHA256_ByMem(PBYTE pData, DWORD dwDataSize) { string value; SHA256 sha256; StringSource(pData, dwDataSize, true, new HashFilter(sha256, new HexEncoder(new StringSink(value)))); return value; } int main(int argc, char * argv[]) { string src = "hello lyshark"; string dst; // 单独计算MD5值的使用 MD5 md5; StringSource(src, true, new HashFilter(md5, new HexEncoder(new StringSink(dst)))); cout << "计算字符串MD5: " << dst << endl; // 单独计算CRC32值 CRC32 crc32; StringSource(src, true, new HashFilter(crc32, new HexEncoder(new StringSink(dst)))); cout << "计算字符串CRC32: " << dst << endl; // 计算一个数组 BYTE pArrayData[] = { 10, 20, 30, 40, 50 }; DWORD dwArraySize = sizeof(pArrayData); dst.clear(); StringSource(pArrayData, dwArraySize, true, new HashFilter(md5, new HexEncoder(new StringSink(dst)))); cout << "计算数组的MD5: " << dst << endl; // 直接对文件计算Sha256散列值 string sha = CalSHA256_ByFile("c://BuidIAT.exe"); cout << "文件散列值: " << sha << endl; // 读入文件到内存后计算 HANDLE hFile = CreateFile(L"c://BuidIAT.exe", GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_ARCHIVE, NULL); DWORD dwFileSize = GetFileSize(hFile, NULL); BYTE *pData = new BYTE[dwFileSize]; ReadFile(hFile, pData, dwFileSize, NULL, NULL); string sha2 = CalSHA256_ByMem(pData, dwFileSize); cout << "内存中文件散列值: " << sha2.c_str() << endl; system("pause"); return 0; } 

 #include #include #include #include #include #include #include #pragma comment(lib, "cryptlib.lib") using namespace std; using namespace CryptoPP; int main(int argc, char * argv[]) { cout << "Key 长度: " << AES::DEFAULT_KEYLENGTH << endl; cout << "最小长度: " << AES::MIN_KEYLENGTH << endl; cout << "最大长度: " << AES::MAX_KEYLENGTH << endl; cout << "Block Size: " << AES::BLOCKSIZE << endl; AutoSeededRandomPool rand; // 产生一个随机数的密钥 SecByteBlock Key(0x00, AES::DEFAULT_KEYLENGTH); rand.GenerateBlock(Key, Key.size()); // 产生一个随机的初始向量 SecByteBlock ival(AES::BLOCKSIZE); rand.GenerateBlock(ival, ival.size()); byte plainText[] = "hello lyshark"; size_t Textlen = std::strlen((char*)plainText) + 1; cout << "待加密字符串长度: " << Textlen << endl; // 加密字符串 CFB_Mode::Encryption cfbEncryption(Key, Key.size(), ival); cfbEncryption.ProcessData(plainText, plainText, Textlen); cout << "显示加密后的十六进制数: "; StringSource strSource1(plainText, Textlen, true, new HexEncoder(new FileSink(cout))); // 解密字符串 并将数据输出到Cout流上 CFB_Mode::Decryption cfbDecryption(Key, Key.size(), ival); cfbDecryption.ProcessData(plainText, plainText, Textlen); cout << endl << "显示解密后的十六进制数: "; StringSource strSource2(plainText, Textlen, true, new HexEncoder(new FileSink(cout))); cout << endl; system("pause"); return 0; } 

 #include #include #include #include #include #include #include #pragma comment(lib, "cryptlib.lib") using namespace std; using namespace CryptoPP; int main(int argc, char * argv[]) { // 开辟空间并将空间赋予初始值0 byte key[CryptoPP::AES::DEFAULT_KEYLENGTH], iv[CryptoPP::AES::BLOCKSIZE]; memset(key, 0x00, CryptoPP::AES::DEFAULT_KEYLENGTH); memset(iv, 0x00, CryptoPP::AES::BLOCKSIZE); // 指定需要加密的字符串与 std::string plain

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