悬了很久了，可能CSDN上没有人回答。难道大家都不会？

x509 v3版证书 PKCS12 
做验签怎么做啊。专家门救救。 下面的代码对吗？ byte[] plainByte = System.Text.Encoding.Default.GetBytes(PlainString);
            byte[] paSign = Hex2byte(EncryptedString);            string certPath = Fetch.MapPath(PathProvider.BasePath + "/pingan/V_GROUP_LPMS_PARTNER_SIGN.cer");
            X509Certificate2 myCert = new X509Certificate2(certPath);
            RSACryptoServiceProvider RSA = (RSACryptoServiceProvider)myCert.PublicKey.Key;
            RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA);
            RSADeformatter.SetHashAlgorithm("SHA1");
            if (RSADeformatter.VerifySignature(plainByte, paSign))
            {
                return "The signature was verified.";
            }
            else
            {
                return "The signature was not verified.";
            }
出异常信息，异常详细信息: System.Security.Cryptography.CryptographicException: 不正确的散列算法。 对方网站是用的JAVA开发的。java签名和验签操作代码如下 
private static String algorithm = "SHA1withRSA";
/**
     * 签名服务
     */
    public String sign(String srcStr) throws Exception {//        KeyStore store = KeyStore.getInstance("JKS");
        KeyStore store = KeyStore.getInstance("PKCS12");
        FileInputStream stream = new FileInputStream(sslTrustStore4SSLChannel); // jks文件名
        String passwd = sslTrustPassword4SSLChannel; // jks文件密码
        store.load(stream, passwd.toCharArray());
        // 获取jks证书别名
        Enumeration en = store.aliases();
        String pName = null;        while (en.hasMoreElements()) {
            String n = (String) en.nextElement();
            if (store.isKeyEntry(n)) {
                pName = n;
            }
        }        // 获取证书的私钥
        PrivateKey key = (PrivateKey) store.getKey(pName, passwd.toCharArray());
        // 进行签名服务
        Signature signature = Signature.getInstance(algorithm);
        signature.initSign(key);
        signature.update(srcStr.getBytes());
        byte[] signedData = signature.sign();
        // 将字节数组转换成HEX字符串返回        return byte2hex(signedData);
    }    /**
     * 进行验签服务
     */
    public boolean verify(String srcStr, String hexStr) throws Exception {
        // 获取指定证书的公钥
        CertificateFactory certInfo = CertificateFactory.getInstance("x.509");
        X509Certificate cert = (X509Certificate) certInfo
                .generateCertificate(new FileInputStream(certFilePath));
        PublicKey publicKey = cert.getPublicKey();
        Signature sign3 = Signature.getInstance(algorithm);
        sign3.initVerify(publicKey);
        sign3.update(srcStr.getBytes());
        // boolean success = sign3.verify(signedData);
        boolean success = sign3.verify(hex2byte(hexStr));
        return success;
    }    public static String byte2hex(byte[] b) {
        String hs = "";
        String stmp = "";
        for (int i = 0; i < b.length; i++) {
            stmp = Integer.toHexString(b[i] & 0xFF);
            if (stmp.length() == 1) {
                hs += "0" + stmp;
            } else {
                hs += stmp;
            }
        }
        return hs.toUpperCase();    }    public static byte[] hex2byte(String hex) throws IllegalArgumentException {
        if (hex.length() % 2 != 0) {
            throw new IllegalArgumentException();
        }
        char[] arr = hex.toCharArray();
        byte[] b = new byte[hex.length() / 2];
        for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {
            String swap = "" + arr[i++] + arr[i];
            int byteint = Integer.parseInt(swap, 16) & 0xFF;
            b[j] = new Integer(byteint).byteValue();
        }
        return b;
    }