private static String byte2hex(byte[] bytes) { StringBuilder sign = new StringBuilder(); for (byte b : bytes) { String hex = Integer.toHexString(b & 255); if (hex.length() == 1) { sign.append("0"); } sign.append(hex.toUpperCase()); } return sign.toString(); }翻译成javascript代码
时间: 2023-03-10 22:13:50 浏览: 152
& 0xFF); if (hex.length() == 1) { sign.append("0"); } sign.append(hex.toUpperCase()); } return sign.toString(); }这个函数可以将字节数组转换为十六进制字符串。
相关问题
在Android中使用sm2加密的代码
下面是一个使用Bouncy Castle库在Android中实现SM2算法加密的代码示例:
```java
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.crypto.signers.SM2Signer;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.jce.spec.ECParameterSpec;
import org.bouncycastle.jce.spec.ECPrivateKeySpec;
import org.bouncycastle.jce.spec.ECPublicKeySpec;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECPoint;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.Security;
import java.security.spec.InvalidKeySpecException;
import java.util.Arrays;
public class SM2Utils {
static {
Security.addProvider(new BouncyCastleProvider());
}
// 生成SM2密钥对
public static AsymmetricCipherKeyPair generateKeyPair() {
ECKeyPairGenerator generator = new ECKeyPairGenerator();
generator.init(new ParametersWithRandom(SM2Utils.getECParameterSpec(), new SecureRandom()));
return generator.generateKeyPair();
}
// 获取SM2椭圆曲线参数
public static ECParameterSpec getECParameterSpec() {
BigInteger p = new BigInteger("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF", 16);
BigInteger a = new BigInteger("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC", 16);
BigInteger b = new BigInteger("28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93", 16);
BigInteger n = new BigInteger("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123", 16);
BigInteger h = BigInteger.valueOf(1L);
ECCurve curve = new ECCurve.Fp(p, a, b);
ECPoint G = curve.decodePoint(Hex.decode("04"
+ "32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1712E06E7A21A7F6"
+ "1F3BDCB0728E9C9E9F9B2F5D0A97CC9C186FF06A96B9ACD3B4F1B34C3D4829E2"), curve.getEncoding());
return new ECParameterSpec(curve, G, n, h);
}
// 将十六进制字符串转换为byte数组
public static byte[] hexToByte(String hexStr) {
if (hexStr == null || hexStr.length() < 1) {
return null;
}
int len = hexStr.length() / 2;
byte[] result = new byte[len];
for (int i = 0; i < len; i++) {
result[i] = (byte) Integer.parseInt(hexStr.substring(2 * i, 2 * i + 2), 16);
}
return result;
}
// 将byte数组转换为十六进制字符串
public static String byteToHex(byte[] bytes) {
StringBuilder hexStr = new StringBuilder();
for (byte aByte : bytes) {
String hex = Integer.toHexString(aByte & 0xFF);
if (hex.length() == 1) {
hexStr.append('0');
}
hexStr.append(hex);
}
return hexStr.toString();
}
// SM2加密
public static byte[] sm2Encrypt(byte[] data, ECPublicKeyParameters publicKey) {
SM2Cipher cipher = new SM2Cipher();
cipher.init(true, new ParametersWithRandom(publicKey, new SecureRandom()));
return cipher.processBlock(data, 0, data.length);
}
// SM2解密
public static byte[] sm2Decrypt(byte[] cipherData, ECPrivateKeyParameters privateKey) {
SM2Cipher cipher = new SM2Cipher();
cipher.init(false, privateKey);
return cipher.processBlock(cipherData, 0, cipherData.length);
}
// SM2签名
public static byte[] sm2Sign(byte[] data, ECPrivateKeyParameters privateKey) throws UnsupportedEncodingException, NoSuchAlgorithmException {
SM2Signer signer = new SM2Signer();
signer.init(true, privateKey);
signer.update(data, 0, data.length);
return signer.generateSignature();
}
// SM2验签
public static boolean sm2Verify(byte[] data, byte[] signData, ECPublicKeyParameters publicKey) throws UnsupportedEncodingException, NoSuchAlgorithmException {
SM2Signer signer = new SM2Signer();
signer.init(false, publicKey);
signer.update(data, 0, data.length);
return signer.verifySignature(signData);
}
}
```
这个示例代码包括了SM2密钥对的生成、SM2加密、SM2解密、SM2签名和SM2验签等功能。你可以根据自己的需求来调用相应的方法。
需要注意的是,这段代码中使用的是Bouncy Castle库中的SM2Cipher类来实现SM2加密和解密。另外,由于SM2算法是一种国密算法,如果需要在对外公开的应用中使用SM2算法,需要获得相应的许可证。
javamd5加密签名 签名无效
Java中使用MD5进行签名验证的流程如下:
1. 将请求参数按照参数名的字典序升序排序,并且将参数名和参数值用等号连接起来,如:param1=value1¶m2=value2¶m3=value3。
2. 在参数字符串末尾加上应用的密钥(通常是一个字符串),如:param1=value1¶m2=value2¶m3=value3&key=密钥。
3. 对参数字符串进行MD5加密,得到签名字符串。
4. 将签名字符串与请求中的签名参数进行比对,如果相等,则说明签名验证通过,否则拒绝请求。
下面是Java代码示例:
```java
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Util {
// 生成MD5签名
public static String generateSignature(String params, String key) {
params = params + "&key=" + key;
String sign = null;
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] bytes = md.digest(params.getBytes("UTF-8"));
sign = byteArrayToHexString(bytes);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return sign;
}
// 将字节数组转换成十六进制字符串
private static String byteArrayToHexString(byte[] bytes) {
StringBuilder sb = new StringBuilder();
for (byte b : bytes) {
String hex = Integer.toHexString(b & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
}
```
你需要将上面的代码中的params参数替换成你的请求参数,key参数替换成你的密钥。如果签名验证无效,可以检查一下参数排序、密钥等是否正确。