C++ 和 java 使用 AES CBC 128 加解密
Java 使用jce， code：
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.util.Arrays;
//import org.apache.commons.codec.binary.Base64;
public class Encryptor {
/**
* 字符串转换成十六进制字符串
*/
public static String str2HexStr(String str) {
char[] chars = "0123456789ABCDEF".toCharArray();
StringBuilder sb = new StringBuilder("");
byte[] bs = str.getBytes();
int bit;
for (int i = 0; i < bs.length; i++) {
bit = (bs[i] & 0x0f0) >> 4;
sb.append(chars[bit]);
bit = bs[i] & 0x0f;
sb.append(chars[bit]);
}
return sb.toString();
}
/**
*
* 十六进制转换字符串
*/
public static byte[] hexStr2Bytes(String hexStr) {
System.out.println("in len :" + hexStr.length());
String str = "0123456789ABCDEF";
char[] hexs = hexStr.toCharArray();
byte[] bytes = new byte[hexStr.length() / 2];
int n;
for (int i = 0; i < bytes.length; i++) {
n = str.indexOf(hexs[2 * i]) * 16;
n += str.indexOf(hexs[2 * i + 1]);
bytes[i] = (byte) (n & 0xff);
}
System.out.println("out len :" + bytes.length);
System.out.println("ddd" + Arrays.toString(bytes));
return bytes;
}
/**
* bytes转换成十六进制字符串
*/
public static String byte2HexStr(byte[] b) {
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++) {
stmp = (Integer.toHexString(b[n] & 0XFF));
if (stmp.length() == 1)
hs = hs + "0" + stmp;
else
hs = hs + stmp;
// if (n
return hs.toUpperCase();
}
public static String encrypt(String key, String initVector, String value) {
try {
System.out.println("key:\t" + Arrays.toString(key.getBytes("UTF-8")));
System.out.println("iv:\t" + Arrays.toString(initVector.getBytes("UTF-8")));
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
//Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(value.getBytes());
System.out.println(Arrays.toString(encrypted));
//System.out.println("encrypted string: "
// + Base64.encodeBase64String(encrypted));
return byte2HexStr(encrypted);
//return Base64.encodeBase64String(encrypted);
} catch (Exception ex) {
ex.printStackTrace();
}
return null;
}
public static String decrypt(String key, String initVector, String encrypted) {
try {
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
//byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted));
byte[] original = cipher.doFinal(hexStr2Bytes(encrypted));
return new String(original);
} catch (Exception ex) {
ex.printStackTrace();
}
return null;
}
public static void main(String[] args) {
String key = "1234567890123456"; // 128 bit key
String initVector = "0000000000000000"; // 16 bytes IV
String en = encrypt(key, initVector, "hello world, cryptopp");
System.out.println(en);
System.out.println(decrypt(key, initVector, en));
}
}
编译运行输出
➜ cypherTest javac Encryptor.java
➜ cypherTest java Encryptor
key: [49, 50, 51, 52, 53, 54, 55, 56, 57, 48, 49, 50, 51, 52, 53, 54]
iv: [48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48]
[2, -46, -51, -100, 37, -49, 11, 72, -29, -122, -15, -49, -44, -40, -17, -69, -14, -69, -112, -20, -124, 98, -8, 108, -88, 33, 23, 19, -66, 3, -48, -59]
02D2CD9C25CF0B48E386F1CFD4D8EFBBF2BB90EC8462F86CA8211713BE03D0C5
in len :64
out len :32
ddd[2, -46, -51, -100, 37, -49, 11, 72, -29, -122, -15, -49, -44, -40, -17, -69, -14, -69, -112, -20, -124, 98, -8, 108, -88, 33, 23, 19, -66, 3, -48, -59]
hello world, cryptopp
C++ 使用cryptopp库(https://www.cryptopp.com/ 下载后，make&& make install 编译安装)
#ifndef CRYPTOPP_H
#define CRYPTOPP_H
#include
#include
#include
#include
#include
#include
class cryptopp {
public:
static bool init(const std::string& key, const std::string& iv);
static std::string encrypt(const std::string& inputPlainText);
static std::string decrypt(const std::string& cipherTextHex);
private:
static byte s_key[CryptoPP::AES::DEFAULT_KEYLENGTH];
static byte s_iv[CryptoPP::AES::DEFAULT_KEYLENGTH];
};
#endif
#include "cryptopp.h"
using namespace std;
void print(const string& cipherText) {
cout << "[";
for( unsigned int i = 0; i < cipherText.size(); i++ )
{
cout << int(cipherText[i]) << ", " ;
}
cout << "]"<< endl;
}
byte cryptopp::s_key[CryptoPP::AES::DEFAULT_KEYLENGTH];
byte cryptopp::s_iv[CryptoPP::AES::DEFAULT_KEYLENGTH];
bool cryptopp::init(const string& key, const string& iv) {
if (key.size() != CryptoPP::AES::DEFAULT_KEYLENGTH) {
return false;
}
if (iv.size() != CryptoPP::AES::BLOCKSIZE) {
return false;
}
for(int i = 0; i < CryptoPP::AES::DEFAULT_KEYLENGTH; i++) {
s_key[i] = key[i];
}
for(int i = 0; i < CryptoPP::AES::BLOCKSIZE; i++) {
s_iv[i] = iv[i];
}
//memset(s_key, 0x00, CryptoPP::AES::DEFAULT_KEYLENGTH);
//memset(s_iv, 0x00, CryptoPP::AES::BLOCKSIZE);
return true;
}
string cryptopp::encrypt(const string& plainText)
{
/*
if ((plainText.length() % CryptoPP::AES::BLOCKSIZE) != 0) {
return "";
}
*/
string cipherTextHex;
try {
string cipherText;
CryptoPP::AES::Encryption aesEncryption(s_key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Encryption cbcEncryption( aesEncryption, s_iv);
//CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink( cipherText ), CryptoPP::StreamTransformationFilter::NO_PADDING);
CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink( cipherText ));
stfEncryptor.Put( reinterpret_cast
stfEncryptor.MessageEnd();
print(cipherText);
for( unsigned int i = 0; i < cipherText.size(); i++ )
{
char ch[3] = {0};
sprintf(ch, "%02x", static_cast
cipherTextHex += ch;
}
} catch (const std::exception &e) {
cipherTextHex = "";
}
return cipherTextHex;
}
string cryptopp::decrypt(const string& cipherTextHex)
{
/*
if(cipherTextHex.empty()) {
return string();
}
if ((cipherTextHex.length() % CryptoPP::AES::BLOCKSIZE) != 0) {
return string();
}
*/
string cipherText;
string decryptedText;
unsigned int i = 0;
while(true)
{
char c;
int x;
stringstream ss;
ss<
c = (char)x;
cipherText += c;
if(i >= cipherTextHex.length() - 2)break;
i += 2;
}
try {
CryptoPP::AES::Decryption aesDecryption(s_key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, s_iv );
//CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedText ),CryptoPP::StreamTransformationFilter::NO_PADDING);
CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedText ));
stfDecryptor.Put( reinterpret_cast
stfDecryptor.MessageEnd();
} catch (const std::exception &e) {
decryptedText = "";
}
return decryptedText;
}
int main() {
cryptopp::init("1234567890123456", "0000000000000000");
string en = cryptopp::encrypt("hello world, cryptopp");
cout << en << endl;
cout << cryptopp::decrypt(en) << endl;
}
编译 g++ cryptopp.cpp -lcryptopp
运行输出
$./a.out [2, -46, -51, -100, 37, -49, 11, 72, -29, -122, -15, -49, -44, -40, -17, -69, -14, -69, -112, -20, -124, 98, -8, 108, -88, 33, 23, 19, -66, 3, -48, -59, ] 02d2cd9c25cf0b48e386f1cfd4d8efbbf2bb90ec8462f86ca8211713be03d0c5 hello world, cryptopp