Question

我们正在研究针对Android的推送通知平台（Google C2DM的故障转移）我正在使用Eclipse Paho Java客户端连接到mosquitto broker（1.0.3）。代理安装在Ubuntu 12.04（AWS EC2实例）上我使用非加密TCP连接成功将客户端连接到服务器。顺便说一句，在调整内核参数之后，我能够在中型EC2机器上向一个代理实例打开100K并发客户端。好工作，mosquitto！

现在我正在尝试使用SSL建立安全连接。我想使用客户端证书对客户端进行身份验证。我按照mosquito_tls page中的说明进行了操作，并为服务器和客户端生成了密钥和自签名证书。配置服务器以使用SSL。

对于客户端部分，我查看了mosquitto_tls_set的签名，并注意到它需要CA证书，客户端密钥和证书文件。我认为CA证书用于客户端验证服务器，而客户端密钥和证书用于服务器验证客户端。我是对的吗？

所以我这就是我在Java方面所做的：

使用充气城堡加载上述三个文件。
将CA证书放入密钥库并用它来创建TrustManagerFactory。
将客户端密钥和证书放在另一个密钥库中并用它来创建的KeyManagerFactory。
创建了一个SSLContext，用两个工厂初始化它。
从SSLContext创建一个SSLSocketFactory并将其传递给Paho的MqttConnectOptions

当我进行连接时，我从mosquitto

OpenSSL Error: error:140890B2:SSL routines:SSL3_GET_CLIENT_CERTIFICATE:no certificate returned
Socket read error on client (null), disconnecting.

编辑：现在我在客户端看到以下异常

javax.net.ssl.SSLHandshakeException: Received fatal alert: unknown_ca

这是完整的代码

static SSLSocketFactory getSocketFactory (final String caCrtFile, final String crtFile, final String keyFile, final String password) throws Exception
{ 
    Security.addProvider(new BouncyCastleProvider());

    PEMReader reader = new PEMReader(new InputStreamReader(new ByteArrayInputStream(Files.readAllBytes(Paths.get(caCrtFile)))));
    X509Certificate caCert = (X509Certificate)reader.readObject();
    reader.close();

    reader = new PEMReader(new InputStreamReader(new ByteArrayInputStream(Files.readAllBytes(Paths.get(crtFile)))));
    X509Certificate cert = (X509Certificate)reader.readObject();
    reader.close();

    reader = new PEMReader(
            new InputStreamReader(new ByteArrayInputStream(Files.readAllBytes(Paths.get(keyFile)))),
            new PasswordFinder() {
                public char[] getPassword() {
                    return password.toCharArray();
                }
            }
    );
    KeyPair key = (KeyPair)reader.readObject();
    reader.close();

    KeyStore caKs = KeyStore.getInstance("JKS");
    caKs.load(null, null);
    caKs.setCertificateEntry("ca-certificate", caCert);
    TrustManagerFactory tmf = TrustManagerFactory.getInstance("PKIX");
    tmf.init(caKs);

    KeyStore ks = KeyStore.getInstance("JKS");
    ks.load(null, null);
    ks.setCertificateEntry("certificate", cert);
    ks.setKeyEntry("private-key", key.getPrivate(), password.toCharArray(), new java.security.cert.Certificate[]{cert});
    //ks.setKeyEntry("public-key", key.getPublic(), password.toCharArray(), new java.security.cert.Certificate[]{cert});
    KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
    kmf.init(ks, password.toCharArray());

    SSLContext context = SSLContext.getInstance("SSLv3");
    context.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);

    return context.getSocketFactory();
}

mosquito.conf看起来像这样

# general options
pid_file /home/ubuntu/mosquitto.pid

# persistence
queue_qos0_messages false
persistence false

# logging
log_dest stdout
connection_messages true
log_timestamp false

# default listener
# disable default listener (open only SSL listener)
#port 1883
#max_connections -1

# SSL listener
listener 1883
cafile /home/ubuntu/etc/ca.crt
certfile /home/ubuntu/etc/server.crt
keyfile /home/ubuntu/etc/server.key
require_certificate true
use_identity_as_username true
max_connections -1

Answer 1

好吧，在得到mosquitto开发者（thx，Roger Light）的一些支持后，我们发现了问题。生成证书（公司，组织单位，公用名）时提供的详细信息在CA，客户端和服务器证书中必须不同。否则代码可以进行一些小的更改。为了清楚起见，我在这里重新发布了正确的代码和一些注释：

import java.io.*;
import java.nio.file.*;
import java.security.*;
import java.security.cert.*;
import java.security.interfaces.*;
import javax.net.ssl.*;

import org.bouncycastle.jce.provider.*;
import org.bouncycastle.openssl.*;

static SSLSocketFactory getSocketFactory (final String caCrtFile, final String crtFile, final String keyFile, final String password) throws Exception
{ 
    Security.addProvider(new BouncyCastleProvider());

    // load CA certificate
    PEMReader reader = new PEMReader(new InputStreamReader(new ByteArrayInputStream(Files.readAllBytes(Paths.get(caCrtFile)))));
    X509Certificate caCert = (X509Certificate)reader.readObject();
    reader.close();

    // load client certificate
    reader = new PEMReader(new InputStreamReader(new ByteArrayInputStream(Files.readAllBytes(Paths.get(crtFile)))));
    X509Certificate cert = (X509Certificate)reader.readObject();
    reader.close();

    // load client private key
    reader = new PEMReader(
            new InputStreamReader(new ByteArrayInputStream(Files.readAllBytes(Paths.get(keyFile)))),
            new PasswordFinder() {
                public char[] getPassword() {
                    return password.toCharArray();
                }
            }
    );
    KeyPair key = (KeyPair)reader.readObject();
    reader.close();

    // CA certificate is used to authenticate server
    KeyStore caKs = KeyStore.getInstance("JKS");
    caKs.load(null, null);
    caKs.setCertificateEntry("ca-certificate", caCert);
    TrustManagerFactory tmf = TrustManagerFactory.getInstance("PKIX");
    tmf.init(caKs);

    // client key and certificates are sent to server so it can authenticate us
    KeyStore ks = KeyStore.getInstance("JKS");
    ks.load(null, null);
    ks.setCertificateEntry("certificate", cert);
    ks.setKeyEntry("private-key", key.getPrivate(), password.toCharArray(), new java.security.cert.Certificate[]{cert});
    KeyManagerFactory kmf = KeyManagerFactory.getInstance("PKIX");
    kmf.init(ks, password.toCharArray());

    // finally, create SSL socket factory
    SSLContext context = SSLContext.getInstance("TLSv1");
    context.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);

    return context.getSocketFactory();
}

从Java客户端（Eclipse Paho）到mosquitto broker的SSL连接：“unknown_ca”

1 个答案: