java - 使用自签名证书生成签名

Question

我有以下使用自签名证书生成签名的示例代码

public static String generateSignature(String data) throws Exception {

        System.out.println("@@inside generateSignature: " + data);

        String signature;

        String jksFilepath = "E:\\test.jks";

        try {
            // Adding Security Provider for PKCS 12
            Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
            // Setting password for the e-Token

            // logging into token
            ks = KeyStore.getInstance("jks");


            FileInputStream fileInputStream = new FileInputStream(jksFilepath);

            // Loading Keystore
            // System.out.println("loading keystore");
            ks.load(fileInputStream, JKSPassword);
            Enumeration<String> e = ks.aliases();

            while (e.hasMoreElements()) {
                alias = e.nextElement();
                // System.out.println("Alias of the e-Token : "+ alias);

                UserCert = (X509Certificate) ks.getCertificate(alias);

                UserCertPubKey = (PublicKey) ks.getCertificate(alias).getPublicKey();

                // System.out.println("loading Private key");
                UserCertPrivKey = (PrivateKey) ks.getKey(alias, JKSPassword);
            }

            // Method Call to generate Signature
            signature = MakeSignature(data);

            return signature;

        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("generateSignature" + e.getCause());
            throw new Exception();
        }

    }

    private static String MakeSignature(String data) {

        System.out.println("@@inside MakeSignature...");

        try {
            PrivateKey privateKey = (PrivateKey) ks.getKey(alias, JKSPassword);
            myPubCert = (X509Certificate) ks.getCertificate(alias);
            Store certs = new JcaCertStore(Arrays.asList(myPubCert));

            CMSSignedDataGenerator generator = new CMSSignedDataGenerator();

            generator.addSignerInfoGenerator(new JcaSimpleSignerInfoGeneratorBuilder().setProvider("BC").build("SHA256withRSA", privateKey, myPubCert));

            generator.addCertificates(certs);

            CMSTypedData data1 = new CMSProcessableByteArray(data.getBytes());

            CMSSignedData signed = generator.generate(data1, true);

            BASE64Encoder encoder = new BASE64Encoder();

            String signedContent = encoder.encode((byte[]) signed.getSignedContent().getContent());

            String envelopedData = encoder.encode(signed.getEncoded());

            return envelopedData;
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("MakeSignature ==" + e.getCause());
            return "";
        }
    }

还有一些相关的功能，但为了简单起见，我没有添加它。

现在我想用 PHP 做完全相同的事情。

JKS 不适用于 PHP 作为 Java 的 keystore 。

我尝试了具有不同加密方法集的 open_ssl 函数。但是我没有得到与我通过此 Java 代码获得的结果相同的预期结果(“不相同”是关于比特率和生成签名的长度)。

有人可以帮我用 PHP 实现相同的签名生成吗？

Answer 1

我觉得PHP官方文档写的很清楚:http://php.net/manual/en/function.openssl-csr-new.php

示例 #1 创建自签名证书

<?php
$dn = array(
    "countryName" => "GB",
    "stateOrProvinceName" => "Somerset",
    "localityName" => "Glastonbury",
    "organizationName" => "The Brain Room Limited",
    "organizationalUnitName" => "PHP Documentation Team",
    "commonName" => "Wez Furlong",
    "emailAddress" => "wez@example.com"
);

// Generate a new private (and public) key pair
$privkey = openssl_pkey_new(array(
    "private_key_bits" => 2048,
    "private_key_type" => OPENSSL_KEYTYPE_RSA,
));

// Generate a certificate signing request
$csr = openssl_csr_new($dn, $privkey, array('digest_alg' => 'sha256'));

// Generate a self-signed cert, valid for 365 days
$x509 = openssl_csr_sign($csr, null, $privkey, $days=365, array('digest_alg' => 'sha256'));

// Save your private key, CSR and self-signed cert for later use
openssl_csr_export($csr, $csrout) and var_dump($csrout);
openssl_x509_export($x509, $certout) and var_dump($certout);
openssl_pkey_export($privkey, $pkeyout, "mypassword") and var_dump($pkeyout);

// Show any errors that occurred here
while (($e = openssl_error_string()) !== false) {
    echo $e . "\n";
}

然后你可以调用openssl_sign: http://php.net/manual/en/function.openssl-sign.php ，使用生成的私钥进行签名。

如果你想在PHP代码中使用Java(JKS)的key，你应该先导出key，然后使用PHP函数加载key。