在 Ubuntu OpenJDK 7 上启用密码

Posted 2023-04-18

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【中文标题】在 Ubuntu OpenJDK 7 上启用密码【英文标题】：Enabled ciphers on Ubuntu OpenJDK 7 【发布时间】：2013-11-15 11:26:26 【问题描述】：

我编写了以下 Java 程序来转储 JVM 中启用的密码：

import java.security.KeyStore;

import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.TrustManagerFactory;

public class ListCiphers

    public static void main(String[] args)
    throws Exception
    
        SSLContext ctx = SSLContext.getInstance("TLSv1");
        // Create an empty TrustManagerFactory to avoid loading default CA
        KeyStore ks = KeyStore.getInstance("JKS");
        TrustManagerFactory tmf = TrustManagerFactory.getInstance("SunX509");
        tmf.init(ks);
        ctx.init(null, tmf.getTrustManagers(), null);
        SSLSocket socket = (SSLSocket) ctx.getSocketFactory().createSocket("mozilla.org", 443);
        printSupportedCiphers(socket);
        printEnabledCiphers(socket);
    

    private static void printSupportedCiphers(SSLSocket socket)
    
        printInfos("Supported cipher suites", socket.getSupportedCipherSuites());
    

    private static void printEnabledCiphers(SSLSocket socket)
    
        printInfos("Enabled cipher suites", socket.getEnabledCipherSuites());
    

    private static void printInfos(String prefix, String[] values)
    
        System.out.println(prefix + ":");
        for (int i = 0; i < values.length; i++)
            System.out.println("  " + values[i]);

当我在 Ubuntu 12.04.3 上使用 openjdk-7-jre/amd64 7u25-2.3.10-1ubuntu0.12.04.2 (/usr/lib/jvm/java-7-openjdk-amd64/jre/ bin/java) 启用调试，我得到以下输出：

$ /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java -Djavax.net.debug=all ListCiphers
trigger seeding of SecureRandom
done seeding SecureRandom
Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256
Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_CBC_SHA256
Allow unsafe renegotiation: false
Allow legacy hello messages: true
Is initial handshake: true
Is secure renegotiation: false
Supported cipher suites:
  TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  TLS_RSA_WITH_AES_256_CBC_SHA256
  TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
  TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
  TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
  TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  TLS_RSA_WITH_AES_256_CBC_SHA
  TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
  TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
  TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  TLS_DHE_DSS_WITH_AES_256_CBC_SHA
  TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  TLS_RSA_WITH_AES_128_CBC_SHA256
  TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
  TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
  TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
  TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  TLS_RSA_WITH_AES_128_CBC_SHA
  TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
  TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
  TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  TLS_DHE_DSS_WITH_AES_128_CBC_SHA
  TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
  TLS_ECDHE_RSA_WITH_RC4_128_SHA
  SSL_RSA_WITH_RC4_128_SHA
  TLS_ECDH_ECDSA_WITH_RC4_128_SHA
  TLS_ECDH_RSA_WITH_RC4_128_SHA
  TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
  TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
  SSL_RSA_WITH_3DES_EDE_CBC_SHA
  TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
  TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
  SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA
  SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA
  SSL_RSA_WITH_RC4_128_MD5
  TLS_EMPTY_RENEGOTIATION_INFO_SCSV
  TLS_DH_anon_WITH_AES_256_CBC_SHA256
  TLS_ECDH_anon_WITH_AES_256_CBC_SHA
  TLS_DH_anon_WITH_AES_256_CBC_SHA
  TLS_DH_anon_WITH_AES_128_CBC_SHA256
  TLS_ECDH_anon_WITH_AES_128_CBC_SHA
  TLS_DH_anon_WITH_AES_128_CBC_SHA
  TLS_ECDH_anon_WITH_RC4_128_SHA
  SSL_DH_anon_WITH_RC4_128_MD5
  TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA
  SSL_DH_anon_WITH_3DES_EDE_CBC_SHA
  TLS_RSA_WITH_NULL_SHA256
  TLS_ECDHE_ECDSA_WITH_NULL_SHA
  TLS_ECDHE_RSA_WITH_NULL_SHA
  SSL_RSA_WITH_NULL_SHA
  TLS_ECDH_ECDSA_WITH_NULL_SHA
  TLS_ECDH_RSA_WITH_NULL_SHA
  TLS_ECDH_anon_WITH_NULL_SHA
  SSL_RSA_WITH_NULL_MD5
  SSL_RSA_WITH_DES_CBC_SHA
  SSL_DHE_RSA_WITH_DES_CBC_SHA
  SSL_DHE_DSS_WITH_DES_CBC_SHA
  SSL_DH_anon_WITH_DES_CBC_SHA
  SSL_RSA_EXPORT_WITH_RC4_40_MD5
  SSL_DH_anon_EXPORT_WITH_RC4_40_MD5
  SSL_RSA_EXPORT_WITH_DES40_CBC_SHA
  SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA
  SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA
  SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA
  TLS_KRB5_WITH_RC4_128_SHA
  TLS_KRB5_WITH_RC4_128_MD5
  TLS_KRB5_WITH_3DES_EDE_CBC_SHA
  TLS_KRB5_WITH_3DES_EDE_CBC_MD5
  TLS_KRB5_WITH_DES_CBC_SHA
  TLS_KRB5_WITH_DES_CBC_MD5
  TLS_KRB5_EXPORT_WITH_RC4_40_SHA
  TLS_KRB5_EXPORT_WITH_RC4_40_MD5
  TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA
  TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5
Enabled cipher suites:
  TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  TLS_RSA_WITH_AES_256_CBC_SHA
  TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
  TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
  TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  TLS_DHE_DSS_WITH_AES_256_CBC_SHA
  TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  TLS_RSA_WITH_AES_128_CBC_SHA
  TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
  TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
  TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  TLS_DHE_DSS_WITH_AES_128_CBC_SHA
  TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
  TLS_ECDHE_RSA_WITH_RC4_128_SHA
  SSL_RSA_WITH_RC4_128_SHA
  TLS_ECDH_ECDSA_WITH_RC4_128_SHA
  TLS_ECDH_RSA_WITH_RC4_128_SHA
  TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
  TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
  SSL_RSA_WITH_3DES_EDE_CBC_SHA
  TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
  TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
  SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA
  SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA
  SSL_RSA_WITH_RC4_128_MD5
  TLS_EMPTY_RENEGOTIATION_INFO_SCSV

奇怪的是，调试日志报告某些密码不受支持，但它们仍然报告在 getSupportedCiphersSuites() 返回的支持列表中。

我的平台有问题吗？

【问题讨论】：

在密码破解过程中有很大帮助！ 【参考方案1】：

我认为你是对的，警告信息没有帮助。如果您查看生成它的sun.security.ssl.SSLContextImpl 中的代码：

        for (CipherSuite suite : allowedCipherSuites) 
           /* snip */

            if (suite.isAvailable() &&
                    suite.obsoleted > protocols.min.v &&
                    suite.supported <= protocols.max.v) 
              /* snip */
             else if (debug != null &&
                    Debug.isOn("sslctx") && Debug.isOn("verbose")) 
                if (suite.obsoleted <= protocols.min.v) 
                    System.out.println(
                        "Ignoring obsoleted cipher suite: " + suite);
                 else if (suite.supported > protocols.max.v) 
                    System.out.println(
                        "Ignoring unsupported cipher suite: " + suite);
                 else 
                    System.out.println(
                        "Ignoring unavailable cipher suite: " + suite);

它循环通过允许的密码套件，而不是支持的密码套件。

【讨论】：

谢谢！指向最新源的在线版本的链接也有助于检查问题是否已得到解决...

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