Is it possible to do use GCM with BC on JDK 1.7?

问题

I'm trying to do a TLS connection using any of the AES GCM variants and from what I understand in the docs this should be possible but I get this error:

Caused by: javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:154)
    at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1989)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1096)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1342)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1369)

The problem is that the server I try to connect to only accepts these cyphers:

TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_RSA_WITH_AES_256_GCM_SHA384
TLS_RSA_WITH_AES_128_GCM_SHA256

I cannot post here the server I try to connect to but I tried to replicate the issue on a github repo. I failed to find a server which only accepts these cypher suites that is why my repo fails with another error.

git clone https://github.com/andreicristianpetcu/gcm_with_bc_onjdk17
cd gcm_with_bc_onjdk17
JAVA_HOME="/usr/lib/jvm/java-7-openjdk-amd64/jre" mvn clean install

Basically this it the code from GitHub

    package com.github.gcm_with_bc_onjdk17;

    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.conn.ssl.NoopHostnameVerifier;
    import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.ssl.SSLContexts;

    import javax.crypto.Cipher;
    import javax.crypto.NoSuchPaddingException;
    import javax.net.ssl.SSLContext;
    import java.io.IOException;
    import java.security.KeyManagementException;
    import java.security.NoSuchAlgorithmException;
    import java.security.NoSuchProviderException;
    import java.security.Security;

    public class GcmWithBouncyCasteleOnJDK17 {

        public SSLConnectionSocketFactory getSslConnectionSocketFactory() throws NoSuchAlgorithmException, NoSuchProviderException, NoSuchPaddingException, KeyManagementException, IOException {
            Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
            Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding", "BC");
            System.out.println(cipher);

            SSLContext sslContext = SSLContexts.custom()
                    .build();

            SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);

            CloseableHttpClient httpClient = HttpClients.custom()
                    .setSSLSocketFactory(sslConnectionSocketFactory)
                    .build();

            HttpGet out = new HttpGet("https://cloudflare.com/");
            CloseableHttpResponse execute = httpClient.execute(out);
            return sslConnectionSocketFactory;
        }

    }

Thank you

回答1:

A work colleague figured out the issue :) here is the fix:

Security.removeProvider(BouncyCastleProvider.PROVIDER_NAME);
Security.removeProvider(BouncyCastleJsseProvider.PROVIDER_NAME);
Security.insertProviderAt(new BouncyCastleProvider(), 0);
Security.insertProviderAt(new BouncyCastleJsseProvider(), 1);

It seems that JDK7 supports TLS 1.2 but not the AES GCM ciphers. Since the cryptography providers are a list somehow the JDK provider was picked up since it supports TLS 1.2 even if it did not support the needed ciphers. Just putting Bouncy Castle a bit higher in the list fixed the issue.

I have no clue why my question was down voted :( I have no clue what rules I broke so it got down voted, I even provided source code.

Anyway.... super glad I found the fix even if it was outside of Stack Overflow. Leaving it here for posterity.

来源：https://stackoverflow.com/questions/49672296/is-it-possible-to-do-use-gcm-with-bc-on-jdk-1-7

标签

ssl

encryption

java-7

bouncycastle

aes-gcm