我正在尝试从AWS实施DynamoDBMapper,但是当我尝试连接到AWS服务器时应用程序崩溃。
首先,我在Android Studio模拟器上运行Android 4.4.2,一切似乎都运行正常。没有问题。尽管如此,当我尝试在实际设备上运行时(在平板电脑上运行4.4.2 ......不知道制造商),我收到以下错误:
Caused by: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x6bffcdf0:
Failure in SSL library, usually a protocol error error:140740B5:SSL
routines:SSL23_CLIENT_HELLO:no ciphers available (external/openssl/ssl/s23_clnt.c:486 0x68474ce0:0x00000000)
这是完整的堆栈跟踪:
Caused by: com.amazonaws.AmazonClientException: Unable to execute HTTP request: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x6bffcdf0: Failure in SSL library, usually a protocol error error:140740B5:SSL routines:SSL23_CLIENT_HELLO:no ciphers available (external/openssl/ssl/s23_clnt.c:486 0x68474ce0:0x00000000)
com.amazonaws.http.AmazonHttpClient.executeHelper AmazonHttpClient.java:421
com.amazonaws.http.AmazonHttpClient.execute AmazonHttpClient.java:196
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.invoke AmazonDynamoDBClient.java:3257
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.getItem AmazonDynamoDBClient.java:904
com.amazonaws.mobileconnectors.dynamodbv2.dynamodbmapper.DynamoDBMapper.load DynamoDBMapper.java:393
com.amazonaws.mobileconnectors.dynamodbv2.dynamodbmapper.DynamoDBMapper.load DynamoDBMapper.java:466
com.amazonaws.mobileconnectors.dynamodbv2.dynamodbmapper.DynamoDBMapper.load DynamoDBMapper.java:340
@@@@.@@@@@.@@@@$@@@@.doInBackground MainActivity.java:1259
@@@@.@@@@@.@@@@$@@@@.doInBackground MainActivity.java:1237
android.os.AsyncTask$2.call AsyncTask.java:288
java.util.concurrent.FutureTask.run FutureTask.java:237
... 4 more
其次是:
Caused by: javax.net.ssl.SSLHandshakeException: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x6bffcdf0: Failure in SSL library, usually a protocol error error:140740B5:SSL routines:SSL23_CLIENT_HELLO:no ciphers available (external/openssl/ssl/s23_clnt.c:486 0x68474ce0:0x00000000)
com.android.org.conscrypt.NativeCrypto.SSL_do_handshake Native Method
com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake OpenSSLSocketImpl.java:406
com.android.okhttp.Connection.upgradeToTls Connection.java:146
com.android.okhttp.Connection.connect Connection.java:107
com.android.okhttp.internal.http.HttpEngine.connect HttpEngine.java:294
com.android.okhttp.internal.http.HttpEngine.sendSocketRequest HttpEngine.java:255
com.android.okhttp.internal.http.HttpEngine.sendRequest HttpEngine.java:206
com.android.okhttp.internal.http.HttpURLConnectionImpl.execute HttpURLConnectionImpl.java:345
com.android.okhttp.internal.http.HttpURLConnectionImpl.connect HttpURLConnectionImpl.java:89
com.android.okhttp.internal.http.HttpURLConnectionImpl.getOutputStream HttpURLConnectionImpl.java:197
com.android.okhttp.internal.http.HttpsURLConnectionImpl.getOutputStream HttpsURLConnectionImpl.java:254
com.amazonaws.http.UrlHttpClient.writeContentToConnection UrlHttpClient.java:128
com.amazonaws.http.UrlHttpClient.execute UrlHttpClient.java:65
com.amazonaws.http.AmazonHttpClient.executeHelper AmazonHttpClient.java:353
... 14 more
这是我的源代码:
BasicAWSCredentials awsCredentials = new BasicAWSCredentials("abcdef12345","blahblahblah");
AmazonDynamoDBClient dynamoDBClient = new AmazonDynamoDBClient(awsCredentials);
DynamoDbMapper dbMapper = new DynamoDBMapper(dynamoDBClient);
//.... then eventually .....
AWSDriverNameTable awsDriverNameTable = dbMapper.load(AWSDriverNameTable.class, merchantID);
这是错误开始的最后一行代码。
现在,我已经浏览了SO和一些搜索引擎,并了解到一些Android设备回归到SSL v3,而我尝试连接的服务器使用TLS v1.0(去了www.ssllabs。 com并发现它确实使用了TLS 1.0)。这是另一个SO问题,有人似乎解决了一个与此类似的问题:
How to disable SSLv3 in android for HttpsUrlConnection?
因此,如果这是导致问题的原因(需要删除SSLv3),我该如何配置AmazonDynamoDbClient以仅使用TLS 1.0?我注意到您可以创建ClientConfiguration并使用:
clientConfiguration.getApacheHttpClientConfig().setSslSocketFactory(NoSSLv3SocketFactory);
并使用AmazonDynamoDbClient构造函数中的awsCredentials提供它。但是,它接受:
org.apache.http.conn.ssl.SSLSocketFactory
不是
javax.net.ssl.SSLSocketFactory
这是我提供的链接答案中使用的内容(更不用说Android Studio告诉我org.apache.http.conn.ssl.SSLSocketFactory已被弃用)。
无论如何,对此事的任何帮助都将非常感激。谢谢!
答案 0 :(得分:0)
您可以使用org.apache.http.conn.ssl.SSLConnectionSocketFactory
代替org.apache.http.conn.ssl.SSLSocketFactory
。
来自SSLSocketFactory的JavaDoc(https://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/conn/ssl/SSLSocketFactory.html) -
已过时。 (4.3)使用SSLConnectionSocketFactory
答案 1 :(得分:0)
Cognito等一些服务支持TLSv1.0 +,而有些人认为DynamoDB仅支持TLSv1.0(不在上面)。如果您的设备支持TLSv1.0,那么它应该可以正常工作。既然你说代码在模拟器上工作但在平板电脑上没有,那么很难说问题出在哪里。我建议你试试这些:
healthy: dynamodb.us-west-2.amazonaws.com
。评论中的一些注释:
要测试服务支持的协议,请使用以下命令:
openssl s_client -connect dynamodb.us-west-2.amazonaws.com:443