package com.nova.sankuai.infra.utils.huifubao.common;
|
|
import org.springframework.stereotype.Component;
|
|
import javax.crypto.Cipher;
|
import java.io.ByteArrayOutputStream;
|
import java.security.PrivateKey;
|
import java.security.PublicKey;
|
import java.security.Signature;
|
|
|
@Component
|
public class SignEncrypt {
|
|
public static final String BC_PROV_ALGORITHM_SHA1RSA = "SHA1withRSA";
|
|
private static final int MAX_ENCRYPT_BLOCK = 117;
|
|
//private static final int MAX_DECRYPT_BLOCK = 128;
|
private static final int MAX_DECRYPT_BLOCK = 256;
|
|
public boolean verify(String data, String sign, PublicKey publicKey) {
|
try {
|
Signature signature = Signature.getInstance(BC_PROV_ALGORITHM_SHA1RSA);
|
signature.initVerify(publicKey);
|
signature.update(data.getBytes(Constants.UTF));
|
return signature.verify(org.bouncycastle.util.encoders.Base64.decode(sign.getBytes()));
|
} catch (Exception e) {
|
return false;
|
}
|
}
|
|
|
public String sign(String obj, PrivateKey privateKey) {
|
String sign = "";
|
try {
|
Signature signature = Signature.getInstance(BC_PROV_ALGORITHM_SHA1RSA);
|
signature.initSign(privateKey);
|
signature.update(obj.getBytes(Constants.UTF));
|
sign = new String(org.bouncycastle.util.encoders.Base64.encode(signature.sign()));
|
} catch (Exception e) {
|
}
|
return sign;
|
}
|
|
public String encrypt(String data, PublicKey publicKey) throws Exception {
|
Cipher cipher = Cipher.getInstance("RSA");
|
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
|
int inputLen = data.getBytes().length;
|
ByteArrayOutputStream out = new ByteArrayOutputStream();
|
int offset = 0;
|
byte[] cache;
|
int i = 0;
|
while (inputLen - offset > 0) {
|
if (inputLen - offset > MAX_ENCRYPT_BLOCK) {
|
cache = cipher.doFinal(data.getBytes(), offset, MAX_ENCRYPT_BLOCK);
|
} else {
|
cache = cipher.doFinal(data.getBytes(), offset, inputLen - offset);
|
}
|
out.write(cache, 0, cache.length);
|
i++;
|
offset = i * MAX_ENCRYPT_BLOCK;
|
}
|
byte[] encryptedData = out.toByteArray();
|
out.close();
|
return new String(org.bouncycastle.util.encoders.Base64.encode(encryptedData), Constants.UTF);
|
}
|
|
public String decrypt(String data, PrivateKey privateKey) throws Exception {
|
Cipher cipher = Cipher.getInstance("RSA");
|
cipher.init(Cipher.DECRYPT_MODE, privateKey);
|
byte[] dataBytes = org.bouncycastle.util.encoders.Base64.decode(data.getBytes());
|
int inputLen = dataBytes.length;
|
ByteArrayOutputStream out = new ByteArrayOutputStream();
|
int offset = 0;
|
byte[] cache;
|
int i = 0;
|
while (inputLen - offset > 0) {
|
if (inputLen - offset > MAX_DECRYPT_BLOCK) {
|
cache = cipher.doFinal(dataBytes, offset, MAX_DECRYPT_BLOCK);
|
} else {
|
cache = cipher.doFinal(dataBytes, offset, inputLen - offset);
|
}
|
out.write(cache, 0, cache.length);
|
i++;
|
offset = i * MAX_DECRYPT_BLOCK;
|
}
|
byte[] decryptedData = out.toByteArray();
|
out.close();
|
return new String(decryptedData, Constants.UTF);
|
}
|
|
}
|