Java版本
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Signature;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import javax.crypto.Cipher;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class CreateSecretKey {
public static final String KEY_ALGORITHM = "RSA";
private static final String PUBLIC_KEY = "RSAPublicKey";
private static final String PRIVATE_KEY = "RSAPrivateKey";
public static final String SIGNATURE_ALGORITHM="MD5withRSA";
/**
* RSA最大加密明文大小
*/
private static final int MAX_ENCRYPT_BLOCK = 117;
/**
* RSA最大解密密文大小
*/
private static final int MAX_DECRYPT_BLOCK = 128;
//获得公钥字符串
public static String getPublicKeyStr(Map<String, Object> keyMap) throws Exception {
//获得map中的公钥对象 转为key对象
Key key = (Key) keyMap.get(PUBLIC_KEY);
//编码返回字符串
return encryptBASE64(key.getEncoded());
}
//获得私钥字符串
public static String getPrivateKeyStr(Map<String, Object> keyMap) throws Exception {
//获得map中的私钥对象 转为key对象
Key key = (Key) keyMap.get(PRIVATE_KEY);
//编码返回字符串
return encryptBASE64(key.getEncoded());
}
//获取公钥
public static PublicKey getPublicKey(String key) throws Exception {
byte[] keyBytes;
keyBytes = (new BASE64Decoder()).decodeBuffer(key);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
PublicKey publicKey = keyFactory.generatePublic(keySpec);
return publicKey;
}
//获取私钥
public static PrivateKey getPrivateKey(String key) throws Exception {
byte[] keyBytes;
keyBytes = (new BASE64Decoder()).decodeBuffer(key);
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
PrivateKey privateKey = keyFactory.generatePrivate(keySpec);
return privateKey;
}
//解码返回byte
public static byte[] decryptBASE64(String key) throws Exception {
return (new BASE64Decoder()).decodeBuffer(key);
}
//编码返回字符串
public static String encryptBASE64(byte[] key) throws Exception {
return (new BASE64Encoder()).encodeBuffer(key);
}
//***************************签名和验证*******************************
public static byte[] sign(byte[] data,String privateKeyStr) throws Exception{
PrivateKey priK = getPrivateKey(privateKeyStr);
Signature sig = Signature.getInstance(SIGNATURE_ALGORITHM);
sig.initSign(priK);
sig.update(data);
return sig.sign();
}
public static boolean verify(byte[] data,byte[] sign,String publicKeyStr) throws Exception{
PublicKey pubK = getPublicKey(publicKeyStr);
Signature sig = Signature.getInstance(SIGNATURE_ALGORITHM);
sig.initVerify(pubK);
sig.update(data);
return sig.verify(sign);
}
//************************加密解密**************************
public static byte[] encrypt(byte[] plainText,String publicKeyStr)throws Exception{
PublicKey publicKey = getPublicKey(publicKeyStr);
Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
int inputLen = plainText.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
int i = 0;
byte[] cache;
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(plainText, offSet, MAX_ENCRYPT_BLOCK);
} else {
cache = cipher.doFinal(plainText, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK;
}
byte[] encryptText = out.toByteArray();
out.close();
return encryptText;
}
public static byte[] decrypt(byte[] encryptText,String privateKeyStr)throws Exception{
PrivateKey privateKey = getPrivateKey(privateKeyStr);
Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, privateKey);
int inputLen = encryptText.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段解密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
cache = cipher.doFinal(encryptText, offSet, MAX_DECRYPT_BLOCK);
} else {
cache = cipher.doFinal(encryptText, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_DECRYPT_BLOCK;
}
byte[] plainText = out.toByteArray();
out.close();
return plainText;
}
public static void main(String[] args) {
Map<String, Object> keyMap;
byte[] cipherText;
String input = "Hello World!";
try {
keyMap = initKey();
String publicKey = getPublicKeyStr(keyMap);
System.out.println("公钥------------------");
System.out.println(publicKey);
String privateKey = getPrivateKeyStr(keyMap);
System.out.println("私钥------------------");
System.out.println(privateKey);
System.out.println("测试可行性-------------------");
System.out.println("明文======="+input);
cipherText = encrypt(input.getBytes(),publicKey);
//加密后的东西
System.out.println("密文======="+new String(cipherText));
//开始解密
byte[] plainText = decrypt(cipherText,privateKey);
System.out.println("解密后明文===== " + new String(plainText));
System.out.println("验证签名-----------");
String str="被签名的内容";
System.out.println("\n原文:"+str);
byte[] signature=sign(str.getBytes(),privateKey);
boolean status=verify(str.getBytes(), signature,publicKey);
System.out.println("验证情况："+status);
} catch (Exception e) {
e.printStackTrace();
}
}
}
Python
import rsa
# 生成密钥
(pubkey, privkey) = rsa.newkeys(1024)
# 保存密钥
with open('public.pem','w+') as f:
f.write(pubkey.save_pkcs1().decode())
with open('private.pem','w+') as f:
f.write(privkey.save_pkcs1().decode())
# 导入密钥
with open('public.pem','r') as f:
pubkey = rsa.PublicKey.load_pkcs1(f.read().encode())
with open('private.pem','r') as f:
privkey = rsa.PrivateKey.load_pkcs1(f.read().encode())
# 明文
message = 'hello'
# 公钥加密
crypto = rsa.encrypt(message.encode(), pubkey)
# 私钥解密
message = rsa.decrypt(crypto, privkey).decode()
print(message)
# 私钥签名
signature = rsa.sign(message.encode(), privkey, 'SHA-1')
# 公钥验证
rsa.verify(message.encode(), signature, pubkey)
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