Java数字证书对文件、加密、解密、签名、校验签名（二）

CertificateTester.java

packagesecurity;

importstaticorg.junit.Assert.assertArrayEquals;
importstaticorg.junit.Assert.assertEquals;
importstaticorg.junit.Assert.assertTrue;

publicclass CertificateTester{

privatestatic final String KEY_STORE_NAME = "asdc.keystore";
privatestatic final String CERTIFICATE_NAME = "asdc.cer";
privatestatic final String password = "123456";
privatestatic final String alias = "www.asdc.com.cn";
privatestatic String certificatePath
privatestatic 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
booleanstatus = 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);
booleanresult = CertificateUtils.verifyFileSign(filePath, sign,certificatePath);
System.err.println("校验结果："+ result);
}

}