Java数字证书对文件/加密/解密/签名/校验签名
CertificateUtils.java
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.Date;
import javax.crypto.Cipher;
/**
*
* 数字签名/加密解密工具包
*
*
* @author IceWee
* @date 2012-4-26
* @version 1.0
*/
public class CertificateUtils {
/**
* Java密钥库(Java 密钥库，JKS)KEY_STORE
*/
public static final String KEY_STORE = "JKS";
public static final String X509 = "X.509";
/**
* 文件读取缓冲区大小
*/
private static final int CACHE_SIZE = 2048;
/**
* 最大文件加密块
*/
private static final int MAX_ENCRYPT_BLOCK = 117;
/**
* 最大文件解密块
*/
private static final int MAX_DECRYPT_BLOCK = 128;
/**
*
* 根据密钥库获得私钥
*
*
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
private static PrivateKey getPrivateKey(String keyStorePath, String alias, String password)
throws Exception {
KeyStore keyStore = getKeyStore(keyStorePath, password);
PrivateKey privateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
return privateKey;
}
/**
*
* 获得密钥库
*
*
* @param keyStorePath 密钥库存储路径
* @param password 密钥库密码
* @return
* @throws Exception
*/
private static KeyStore getKeyStore(String keyStorePath, String password)
throws Exception {
FileInputStream in = new FileInputStream(keyStorePath);
KeyStore keyStore = KeyStore.getInstance(KEY_STORE);
keyStore.load(in, password.toCharArray());
in.close();
return keyStore;
}
/**
*
* 根据证书获得公钥
*
*
* @param certificatePath 证书存储路径
* @return
* @throws Exception
*/
private static PublicKey getPublicKey(String certificatePath)
throws Exception {
Certificate certificate = getCertificate(certificatePath);
PublicKey publicKey = certificate.getPublicKey();
return publicKey;
}
/**
*
* 获得证书
*
*
* @param certificatePath 证书存储路径
* @return
* @throws Exception
*/
private static Certificate getCertificate(String certificatePath)
throws Exception {
CertificateFactory certificateFactory = CertificateFactory.getInstance(X509);
FileInputStream in = new FileInputStream(certificatePath);
Certificate certificate = certificateFactory.generateCertificate(in);
in.close();
return certificate;
}
/**
*
* 根据密钥库获得证书
*
*
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
private static Certificate getCertificate(String keyStorePath, String alias, String password)
throws Exception {
KeyStore keyStore = getKeyStore(keyStorePath, password);
Certificate certificate = keyStore.getCertificate(alias);
return certificate;
}
/**
*
* 私钥加密
*
*
* @param data 源数据
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
public static byte[] encryptByPrivateKey(byte[] data, String keyStorePath, String alias, String password)
throws Exception {
// 取得私钥
PrivateKey privateKey = getPrivateKey(keyStorePath, alias, password);
Cipher cipher = Cipher.getInstance(privateKey.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段加密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK;
}
byte[] encryptedData = out.toByteArray();
out.close();
return encryptedData;
}
/**
*
* 文件私钥加密
*
*
* 过大的文件可能会导致内存溢出
*
*
* @param filePath 文件路径
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
public static byte[] encryptFileByPrivateKey(String filePath, String keyStorePath, String alias, String password)
throws Exception {
byte[] data = fileToByte(filePath);
return encryptByPrivateKey(data, keyStorePath, alias, password);
}
/**
*
* 文件加密
*
*
* @param srcFilePath 源文件
* @param destFilePath 加密后文件
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @throws Exception
*/
public static void encryptFileByPrivateKey(String srcFilePath, String destFilePath, String keyStorePath, String alias, String password)
throws Exception {
// 取得私钥
PrivateKey privateKey = getPrivateKey(keyStorePath, alias, password);
Cipher cipher = Cipher.getInstance(privateKey.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
File srcFile = new File(srcFilePath);
FileInputStream in = new FileInputStream(srcFile);
File destFile = new File(destFilePath);
if (!destFile.getParentFile().exists()) {
destFile.getParentFile().mkdirs();
}
destFile.createNewFile();
OutputStream out = new FileOutputStream(destFile);
byte[] data = new byte[MAX_ENCRYPT_BLOCK];
byte[] encryptedData; // 加密块
while (in.read(data) != -1) {
encryptedData = cipher.doFinal(data);
out.write(encryptedData, 0, encryptedData.length);
out.flush();
}
out.close();
in.close();
}
/**
*
* 文件加密成BASE64编码的字符串
*
*
* @param filePath 文件路径
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
public static String encryptFileToBase64ByPrivateKey(String filePath, String keyStorePath, String alias, String password)
throws Exception {
byte[] encryptedData = encryptFileByPrivateKey(filePath, keyStorePath, alias, password);
return Base64Utils.encode(encryptedData);
}
/**
*
* 私钥解密
*
*
* @param encryptedData 已加密数据
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
public static byte[] decryptByPrivateKey(byte[] encryptedData, String keyStorePath, String alias, String password)
throws Exception {
// 取得私钥
PrivateKey privateKey = getPrivateKey(keyStorePath, alias, password);
Cipher cipher = Cipher.getInstance(privateKey.getAlgorithm());
cipher.init(Cipher.DECRYPT_MODE, privateKey);
// 解密byte数组最大长度限制: 128
int inputLen = encryptedData.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(encryptedData, offSet, MAX_DECRYPT_BLOCK);
} else {
cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_DECRYPT_BLOCK;
}
byte[] decryptedData = out.toByteArray();
out.close();
return decryptedData;
}
/**
*
* 公钥加密
*
*
* @param data 源数据
* @param certificatePath 证书存储路径
* @return
* @throws Exception
*/
public static byte[] encryptByPublicKey(byte[] data, String certificatePath)
throws Exception {
// 取得公钥
PublicKey publicKey = getPublicKey(certificatePath);
Cipher cipher = Cipher.getInstance(publicKey.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段加密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK;
}
byte[] encryptedData = out.toByteArray();
out.close();
return encryptedData;
}
/**
*
* 公钥解密
*
*
* @param encryptedData 已加密数据
* @param certificatePath 证书存储路径
* @return
* @throws Exception
*/
public static byte[] decryptByPublicKey(byte[] encryptedData, String certificatePath)
throws Exception {
PublicKey publicKey = getPublicKey(certificatePath);
Cipher cipher = Cipher.getInstance(publicKey.getAlgorithm());
cipher.init(Cipher.DECRYPT_MODE, publicKey);
int inputLen = encryptedData.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(encryptedData, offSet, MAX_DECRYPT_BLOCK);
} else {
cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_DECRYPT_BLOCK;
}
byte[] decryptedData = out.toByteArray();
out.close();
return decryptedData;
}
/**
*
* 文件解密
*
*
* @param srcFilePath 源文件
* @param destFilePath 目标文件
* @param certificatePath 证书存储路径
* @throws Exception
*/
public static void decryptFileByPublicKey(String srcFilePath, String destFilePath, String certificatePath)
throws Exception {
PublicKey publicKey = getPublicKey(certificatePath);
Cipher cipher = Cipher.getInstance(publicKey.getAlgorithm());
cipher.init(Cipher.DECRYPT_MODE, publicKey);
File srcFile = new File(srcFilePath);
FileInputStream in = new FileInputStream(srcFile);
File destFile = new File(destFilePath);
if (!destFile.getParentFile().exists()) {
destFile.getParentFile().mkdirs();
}
destFile.createNewFile();
OutputStream out = new FileOutputStream(destFile);
byte[] data = new byte[MAX_DECRYPT_BLOCK];
byte[] decryptedData; // 解密块
while (in.read(data) != -1) {
decryptedData = cipher.doFinal(data);
out.write(decryptedData, 0, decryptedData.length);
out.flush();
}
out.close();
in.close();
}
/**
*
* 生成数据签名
*
*
* @param data 源数据
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
public static byte[] sign(byte[] data, String keyStorePath, String alias, String password)
throws Exception {
// 获得证书
X509Certificate x509Certificate = (X509Certificate) getCertificate(keyStorePath, alias, password);
// 获取私钥
KeyStore keyStore = getKeyStore(keyStorePath, password);
// 取得私钥
PrivateKey privateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
// 构建签名
Signature signature = Signature.getInstance(x509Certificate.getSigAlgName());
signature.initSign(privateKey);
signature.update(data);
return signature.sign();
}
/**
*
* 生成数据签名并以BASE64编码
*
*
* @param data 源数据
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
public static String signToBase64(byte[] data, String keyStorePath, String alias, String password)
throws Exception {
return Base64Utils.encode(sign(data, keyStorePath, alias, password));
}
/**
*
* 生成文件数据签名(BASE64)
*
*
* 需要先将文件私钥加密，再根据加密后的数据生成签名(BASE64)，适用于小文件
*
*
* @param filePath 源文件
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
public static String signFileToBase64WithEncrypt(String filePath, String keyStorePath, String alias, String password)
throws Exception {
byte[] encryptedData = encryptFileByPrivateKey(filePath, keyStorePath, alias, password);
return signToBase64(encryptedData, keyStorePath, alias, password);
}
/**
*
* 生成文件签名
*
*
* 注意：
* 方法中使用了FileChannel，其巨大Bug就是不会释放文件句柄，导致签名的文件无法操作(移动或删除等)
* 该方法已被generateFileSign取代
*
*
* @param filePath 文件路径
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
* @throws Exception
*/
@Deprecated
public static byte[] signFile(String filePath, String keyStorePath, String alias, String password)
throws Exception {
byte[] sign = new byte[0];
// 获得证书
X509Certificate x509Certificate = (X509Certificate) getCertificate(keyStorePath, alias, password);
// 获取私钥
KeyStore keyStore = getKeyStore(keyStorePath, password);
// 取得私钥
PrivateKey privateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
// 构建签名
Signature signature = Signature.getInstance(x509Certificate.getSigAlgName());
signature.initSign(privateKey);
File file = new File(filePath);
if (file.exists()) {
FileInputStream in = new FileInputStream(file);
FileChannel fileChannel = in.getChannel();
MappedByteBuffer byteBuffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
signature.update(byteBuffer);
fileChannel.close();
in.close();
sign = signature.sign();
}
return sign;
}
/**
*
* 生成文件数字签名
*
*
*
* 注意：
* 生成签名时update的byte数组大小和验证签名时的大小应相同，否则验证无法通过
*
*
* @param filePath
* @param keyStorePath
* @param alias
* @param password
* @return
* @throws Exception
*/
public static byte[] generateFileSign(String filePath, String keyStorePath, String alias, String password)
throws Exception {
byte[] sign = new byte[0];
// 获得证书
X509Certificate x509Certificate = (X509Certificate) getCertificate(keyStorePath, alias, password);
// 获取私钥
KeyStore keyStore = getKeyStore(keyStorePath, password);
// 取得私钥
PrivateKey privateKey = (PrivateKey) keyStore.getKey(alias, password.toCharArray());
// 构建签名
Signature signature = Signature.getInstance(x509Certificate.getSigAlgName());
signature.initSign(privateKey);
File file = new File(filePath);
if (file.exists()) {
FileInputStream in = new FileInputStream(file);
byte[] cache = new byte[CACHE_SIZE];
int nRead = 0;
while ((nRead = in.read(cache)) != -1) {
signature.update(cache, 0, nRead);
}
in.close();
sign = signature.sign();
}
return sign;
}
/**
*
* 文件签名成BASE64编码字符串
*
*
* @param filePath
* @param keyStorePath
* @param alias
* @param password
* @return
* @throws Exception
*/
public static String signFileToBase64(String filePath, String keyStorePath, String alias, String password)
throws Exception {
return Base64Utils.encode(generateFileSign(filePath, keyStorePath, alias, password));
}
/**
*
* 验证签名
*
*
* @param data 已加密数据
* @param sign 数据签名[BASE64]
* @param certificatePath 证书存储路径
* @return
* @throws Exception
*/
public static boolean verifySign(byte[] data, String sign, String certificatePath)
throws Exception {
// 获得证书
X509Certificate x509Certificate = (X509Certificate) getCertificate(certificatePath);
// 获得公钥
PublicKey publicKey = x509Certificate.getPublicKey();
// 构建签名
Signature signature = Signature.getInstance(x509Certificate.getSigAlgName());
signature.initVerify(publicKey);
signature.update(data);
return signature.verify(Base64Utils.decode(sign));
}
/**
*
* 校验文件完整性
*
*
* 鉴于FileChannel存在的巨大Bug，该方法已停用，被validateFileSign取代
*
*
* @param filePath 文件路径
* @param sign 数据签名[BASE64]
* @param certificatePath 证书存储路径
* @return
* @throws Exception
*/
@Deprecated
public static boolean verifyFileSign(String filePath, String sign, String certificatePath)
throws Exception {
boolean result = false;
// 获得证书
X509Certificate x509Certificate = (X509Certificate) getCertificate(certificatePath);
// 获得公钥
PublicKey publicKey = x509Certificate.getPublicKey();
// 构建签名
Signature signature = Signature.getInstance(x509Certificate.getSigAlgName());
signature.initVerify(publicKey);
File file = new File(filePath);
if (file.exists()) {
byte[] decodedSign = Base64Utils.decode(sign);
FileInputStream in = new FileInputStream(file);
FileChannel fileChannel = in.getChannel();
MappedByteBuffer byteBuffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
signature.update(byteBuffer);
in.close();
result = signature.verify(decodedSign);
}
return result;
}
/**
*
* 校验文件签名
*
*
* @param filePath
* @param sign
* @param certificatePath
* @return
* @throws Exception
*/
public static boolean validateFileSign(String filePath, String sign, String certificatePath)
throws Exception {
boolean result = false;
// 获得证书
X509Certificate x509Certificate = (X509Certificate) getCertificate(certificatePath);
// 获得公钥
PublicKey publicKey = x509Certificate.getPublicKey();
// 构建签名
Signature signature = Signature.getInstance(x509Certificate.getSigAlgName());
signature.initVerify(publicKey);
File file = new File(filePath);
if (file.exists()) {
byte[] decodedSign = Base64Utils.decode(sign);
FileInputStream in = new FileInputStream(file);
byte[] cache = new byte[CACHE_SIZE];
int nRead = 0;
while ((nRead = in.read(cache)) != -1) {
signature.update(cache, 0, nRead);
}
in.close();
result = signature.verify(decodedSign);
}
return result;
}
/**
*
* BASE64解码->签名校验
*
*
* @param base64String BASE64编码字符串
* @param sign 数据签名[BASE64]
* @param certificatePath 证书存储路径
* @return
* @throws Exception
*/
public static boolean verifyBase64Sign(String base64String, String sign, String certificatePath)
throws Exception {
byte[] data = Base64Utils.decode(base64String);
return verifySign(data, sign, certificatePath);
}
/**
*
* BASE64解码->公钥解密-签名校验
*
*
*
* @param base64String BASE64编码字符串
* @param sign 数据签名[BASE64]
* @param certificatePath 证书存储路径
* @return
* @throws Exception
*/
public static boolean verifyBase64SignWithDecrypt(String base64String, String sign, String certificatePath)
throws Exception {
byte[] encryptedData = Base64Utils.decode(base64String);
byte[] data = decryptByPublicKey(encryptedData, certificatePath);
return verifySign(data, sign, certificatePath);
}
/**
*
* 文件公钥解密->签名校验
*
*
* @param encryptedFilePath 加密文件路径
* @param sign 数字证书[BASE64]
* @param certificatePath
* @return
* @throws Exception
*/
public static boolean verifyFileSignWithDecrypt(String encryptedFilePath, String sign, String certificatePath)
throws Exception {
byte[] encryptedData = fileToByte(encryptedFilePath);
byte[] data = decryptByPublicKey(encryptedData, certificatePath);
return verifySign(data, sign, certificatePath);
}
/**
*
* 校验证书当前是否有效
*
*
* @param certificate 证书
* @return
*/
public static boolean verifyCertificate(Certificate certificate) {
return verifyCertificate(new Date(), certificate);
}
/**
*
* 验证证书是否过期或无效
*
*
* @param date 日期
* @param certificate 证书
* @return
*/
public static boolean verifyCertificate(Date date, Certificate certificate) {
boolean isValid = true;
try {
X509Certificate x509Certificate = (X509Certificate) certificate;
x509Certificate.checkValidity(date);
} catch (Exception e) {
isValid = false;
}
return isValid;
}
/**
*
* 验证数字证书是在给定的日期是否有效
*
*
* @param date 日期
* @param certificatePath 证书存储路径
* @return
*/
public static boolean verifyCertificate(Date date, String certificatePath) {
Certificate certificate;
try {
certificate = getCertificate(certificatePath);
return verifyCertificate(certificate);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
*
* 验证数字证书是在给定的日期是否有效
*
*
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
*/
public static boolean verifyCertificate(Date date, String keyStorePath, String alias, String password) {
Certificate certificate;
try {
certificate = getCertificate(keyStorePath, alias, password);
return verifyCertificate(certificate);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
*
* 验证数字证书当前是否有效
*
*
* @param keyStorePath 密钥库存储路径
* @param alias 密钥库别名
* @param password 密钥库密码
* @return
*/
public static boolean verifyCertificate(String keyStorePath, String alias, String password) {
return verifyCertificate(new Date(), keyStorePath, alias, password);
}
/**
*
* 验证数字证书当前是否有效
*
*
* @param certificatePath 证书存储路径
* @return
*/
public static boolean verifyCertificate(String certificatePath) {
return verifyCertificate(new Date(), certificatePath);
}
/**
*
* 文件转换为byte数组
*
*
* @param filePath 文件路径
* @return
* @throws Exception
*/
public static byte[] fileToByte(String filePath) throws Exception {
byte[] data = new byte[0];
File file = new File(filePath);
if (file.exists()) {
FileInputStream in = new FileInputStream(file);
ByteArrayOutputStream out = new ByteArrayOutputStream(2048);
byte[] cache = new byte[CACHE_SIZE];
int nRead = 0;
while ((nRead = in.read(cache)) != -1) {
out.write(cache, 0, nRead);
out.flush();
}
out.close();
in.close();
data = out.toByteArray();
}
return data;
}
/**
*
* 二进制数据写文件
*
*
* @param bytes 二进制数据
* @param filePath 文件生成目录
*/
public static void byteArrayToFile(byte[] bytes, String filePath) throws Exception {
InputStream in = new ByteArrayInputStream(bytes);
File destFile = new File(filePath);
if (!destFile.getParentFile().exists()) {
destFile.getParentFile().mkdirs();
}
destFile.createNewFile();
OutputStream out = new FileOutputStream(destFile);
byte[] cache = new byte[CACHE_SIZE];
int nRead = 0;
while ((nRead = in.read(cache)) != -1) {
out.write(cache, 0, nRead);
out.flush();
}
out.close();
in.close();
}
}CertificateTester.java
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class CertificateTester {
private static final String KEY_STORE_NAME = "asdc.keystore";
private static final String CERTIFICATE_NAME = "asdc.cer";
private static final String password = "123456";
private static final String alias = "www.asdc.com.cn";
private static String certificatePath;
private static String keyStorePath;
static {
String currentDir = CertificateTester.class.getResource("").getPath();
if (currentDir.startsWith("/"))
currentDir = currentDir.substring(1);
if (!currentDir.endsWith("/"))
currentDir += "/";
keyStorePath = currentDir + KEY_STORE_NAME;
certificatePath = currentDir + CERTIFICATE_NAME;
}
public static void main(String[] args) throws Exception {
simple();
simpleSign();
testFileSign();
}
static void simple() throws Exception {
System.err.println("公钥加密——私钥解密");
String source = "这是一行没有任何意义的文字，你看完了等于没看，不是吗？";
byte[] data = source.getBytes();
byte[] encrypt = CertificateUtils.encryptByPublicKey(data, certificatePath);
byte[] decrypt = CertificateUtils.decryptByPrivateKey(encrypt, keyStorePath, alias, password);
String outputStr = new String(decrypt);
System.out.println("加密前: \r\n" + source + "\r\n" + "解密后: \r\n" + outputStr);
// 验证数据一致
assertArrayEquals(data, decrypt);
// 验证证书有效
assertTrue(CertificateUtils.verifyCertificate(certificatePath));
}
static void simpleSign() throws Exception {
System.err.println("私钥加密——公钥解密");
String source = "这是一行签名的测试文字";
byte[] data = source.getBytes();
byte[] encodedData = CertificateUtils.encryptByPrivateKey(data, keyStorePath, alias, password);
byte[] decodedData = CertificateUtils.decryptByPublicKey(encodedData, certificatePath);
String target = new String(decodedData);
System.out.println("加密前: \r\n" + source + "\r\n" + "解密后: \r\n" + target);
assertEquals(source, target);
System.err.println("私钥签名——公钥验证签名");
// 产生签名
String sign = CertificateUtils.signToBase64(encodedData, keyStorePath, alias, password);
System.out.println("签名:\r\n" + sign);
// 验证签名
boolean status = CertificateUtils.verifySign(encodedData, sign, certificatePath);
System.err.println("状态:\r\n" + status);
assertTrue(status);
}
static void testFileSign() throws Exception {
String filePath = "D:/software/eclipse-SDK-3.3.2-win32.zip";
String sign = CertificateUtils.signFileToBase64(filePath, keyStorePath, alias, password);
System.err.println("生成签名：\r\n" + sign);
boolean result = CertificateUtils.verifyFileSign(filePath, sign, certificatePath);
System.err.println("校验结果：" + result);
}
}