ssl interview questions
Top ssl frequently asked interview questions
I understand that the keystore would usually hold private/public keys and the trust store only public keys (and represents the list of trusted parties you intend to communicate with). Well, that's my first assumption, so if that's not correct, I probably haven't started very well...
I was interested though in understanding how / when you distinguish the stores when using keytool.
So, far I've created a keystore using
keytool -import -alias bob -file bob.crt -keystore keystore.ks
which creates my keystore.ks file. I answer yes to the question do I trust bob but it is unclear to me if this has created a keystore file or a truststore file? I can set up my application to use the file as either.
-Djavax.net.ssl.keyStore=keystore.ks -Djavax.net.ssl.keyStorePassword=x
-Djavax.net.ssl.trustStore=keystore.ks -Djavax.net.ssl.trustStorePassword=x
and with System.setProperty( "javax.net.debug", "ssl") set, I can see the certificate under trusted certifications (but not under the keystore section). The particular certificate I'm importing has only a public key and I intend to use it to send stuff over an SSL connection to Bob (but perhaps that's best left for another question!).
Any pointers or clarifications would be much appreciated. Is the output of keytool the same whatever you import and its just convention that says one is a keystore and the other a trust store? What's the relationship when using SSL etc?
Source: (StackOverflow)
I have this in activemq config
<sslContext>
<sslContext keyStore="file:/home/alex/work/amq/broker.ks"
keyStorePassword="password" trustStore="file:${activemq.base}/conf/broker.ts"
trustStorePassword="password"/>
</sslContext>
I have a pair of x509 cert and a key file
How do I import those two to be used in ssl and ssl+stomp connectors? All examples i could google always generate the key themselves, but I already have a key.
I have tried
keytool -import -keystore ./broker.ks -file mycert.crt
but this only imports the certificate and not the key file and results in
2009-05-25 13:16:24,270 [localhost:61612] ERROR TransportConnector - Could not accept connection : No available certificate or key corresponds to the SSL cipher suites which are enabled.
I have tried concatenating the cert and the key but got the same result
How do I import the key?
Source: (StackOverflow)
How can I create a PEM file from an SSL certificate? These are the files I have available:
.crt, server.csr and server.key.
Source: (StackOverflow)
I have created a self-signed SSL certificate for the localhost CN. Firefox accepts this certificate after initially complaining about it, as expected. Chrome and IE, however, refuse to accept it, even after adding the certificate to the system certificate store under Trusted Roots. Even though the certificate is listed as correctly installed when I click "View certificate information" in Chrome's HTTPS popup, it still insists the certificate cannot be trusted.
What am I supposed to do to get Chrome to accept the certificate and stop complaining about it?
Source: (StackOverflow)
I am creating a secure web based API that uses HTTPS; however, if I allow the users to configure it (include sending password) using a query string will this also be secure or should I force it to be done via a POST?
Source: (StackOverflow)
I am using Authlogic-Connect for third party logins. After running appropriate migrations, Twitter/Google/yahoo logins seem to work fine but the facebook login throws exception:
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
The dev log shows
OpenSSL::SSL::SSLError (SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed):
app/controllers/users_controller.rb:37:in `update'
Please suggest..
Source: (StackOverflow)
Are all URLs encrypted when using TLS/SSL (https) encryption? I would like to know because I want all URL data to be hidden when using TLS/SSL (https).
If TLS/SSL gives you total URL encryption then I don't have to worry about hiding confidential information from URLs.
Source: (StackOverflow)
My site is working great over SSL in my desktops (chrome) I have a green lock near the address bar saying "Identity verified"
But using a mobile mobile browser (Chrome/Safari)I see the following message - "The identity of this website has not been verified" and the lock (in chrome near the address bar) has a red x mark on it
Any idea why it happens?
Source: (StackOverflow)
There are a few ways to include jQuery and jQuery UI and I'm wondering what people are using?
- Google JSAPI
- jQuery's site
- your own site/server
- another CDN
I have recently been using Google JSAPI, but have found that it takes a long time to setup an SSL connection or even only to resolve google.com. I have been using the following for Google:
<script src="https://www.google.com/jsapi"></script>
<script>
google.load('jquery', '1.3.1');
</script>
I like the idea of using Google so it's cached when visiting other sites and to save bandwidth from our server, but if it keeps being the slow portion of the site, I may change the include.
What do you use? Have you had any issues?
Edit: Just visited jQuery's site and they use the following method:
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
Edit2: Here's how I've been including jQuery without any problems for the last year:
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
The difference is the removal of http:. By removing this, you don't need to worry about switching between http and https.
Source: (StackOverflow)
I'm stuck behind a firewall so have to use HTTPS to access my GitHub repository. I'm using cygwin 1.7.7 on Windows XP.
I've tried setting the remote to https://username@github.com/username/ExcelANT.git, but pushing prompts for a password, but doesn't do anything once I've entered it.
https://username:<password>github.com/username/ExcelANT.git and cloning the empty repo from scratch but each time it gives me the same error
error: SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed while accessing https://github.com/username/ExcelANT.git/info/refs
Turning on GIT_CURL_VERBOSE=1 gives me
* About to connect() to github.com port 443 (#0)
* Trying 207.97.227.239... * successfully set certificate verify locations:
* CAfile: none
CApath: /usr/ssl/certs
* SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
* Expire cleared
* Closing connection #0
* About to connect() to github.com port 443 (#0)
* Trying 207.97.227.239... * successfully set certificate verify locations:
* CAfile: none
CApath: /usr/ssl/certs
* SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
* Expire cleared
* Closing connection #0
error: SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed while accessing https://github.com/username/ExcelANT.git/info/refs
fatal: HTTP request failed
Is this a problem with my firewall, cygwin or what?
I hadn't set the HTTP proxy in the Git config, however it's an ISA server that needs NTLM authentication, not basic, so unless anyone knows how to force git to use NTLM, I'm scuppered.
Source: (StackOverflow)
I'm adding https support to an embedded linux device. I have tried to generate a self-signed certificate with these steps:
openssl req -new > cert.csr
openssl rsa -in privkey.pem -out key.pem
openssl x509 -in cert.csr -out cert.pem -req -signkey key.pem -days 1001
cat key.pem>>cert.pem
This works, but I get some errors with, for example, google chrome:
This is probably not the site you are looking for!
The site's security certificate is not trusted!
Am I missing something? Is this the correct way to build a self-signed certificate?
Source: (StackOverflow)
Recently posted a question regarding the HttpClient over Https (found here). I've made some headway, but I've run into new issues. As with my last problem, I can't seem to find an example anywhere that works for me. Basically, I want my client to accept any certificate (because I'm only ever pointing to one server) but I keep getting a javax.net.ssl.SSLException: Not trusted server certificate exception.
So this is what I have:
public void connect() throws A_WHOLE_BUNCH_OF_EXCEPTIONS {
HttpPost post = new HttpPost(new URI(PROD_URL));
post.setEntity(new StringEntity(BODY));
KeyStore trusted = KeyStore.getInstance("BKS");
trusted.load(null, "".toCharArray());
SSLSocketFactory sslf = new SSLSocketFactory(trusted);
sslf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(new Scheme ("https", sslf, 443));
SingleClientConnManager cm = new SingleClientConnManager(post.getParams(),
schemeRegistry);
HttpClient client = new DefaultHttpClient(cm, post.getParams());
HttpResponse result = client.execute(post);
}
And here's the error I'm getting:
W/System.err( 901): javax.net.ssl.SSLException: Not trusted server certificate
W/System.err( 901): at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:360)
W/System.err( 901): at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:92)
W/System.err( 901): at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:321)
W/System.err( 901): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:129)
W/System.err( 901): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
W/System.err( 901): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
W/System.err( 901): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:348)
W/System.err( 901): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
W/System.err( 901): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
W/System.err( 901): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
W/System.err( 901): at me.harrisonlee.test.ssl.MainActivity.connect(MainActivity.java:129)
W/System.err( 901): at me.harrisonlee.test.ssl.MainActivity.access$0(MainActivity.java:77)
W/System.err( 901): at me.harrisonlee.test.ssl.MainActivity$2.run(MainActivity.java:49)
W/System.err( 901): Caused by: java.security.cert.CertificateException: java.security.InvalidAlgorithmParameterException: the trust anchors set is empty
W/System.err( 901): at org.apache.harmony.xnet.provider.jsse.TrustManagerImpl.checkServerTrusted(TrustManagerImpl.java:157)
W/System.err( 901): at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:355)
W/System.err( 901): ... 12 more
W/System.err( 901): Caused by: java.security.InvalidAlgorithmParameterException: the trust anchors set is empty
W/System.err( 901): at java.security.cert.PKIXParameters.checkTrustAnchors(PKIXParameters.java:645)
W/System.err( 901): at java.security.cert.PKIXParameters.<init>(PKIXParameters.java:89)
W/System.err( 901): at org.apache.harmony.xnet.provider.jsse.TrustManagerImpl.<init>(TrustManagerImpl.java:89)
W/System.err( 901): at org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl.engineGetTrustManagers(TrustManagerFactoryImpl.java:134)
W/System.err( 901): at javax.net.ssl.TrustManagerFactory.getTrustManagers(TrustManagerFactory.java:226)W/System.err( 901): at org.apache.http.conn.ssl.SSLSocketFactory.createTrustManagers(SSLSocketFactory.java:263)
W/System.err( 901): at org.apache.http.conn.ssl.SSLSocketFactory.<init>(SSLSocketFactory.java:190)
W/System.err( 901): at org.apache.http.conn.ssl.SSLSocketFactory.<init>(SSLSocketFactory.java:216)
W/System.err( 901): at me.harrisonlee.test.ssl.MainActivity.connect(MainActivity.java:107)
W/System.err( 901): ... 2 more
Source: (StackOverflow)
This question already has an answer here:
When I run bundle install for my Rails 3 project on Centos 5.5 it fails with an error:
Gem::RemoteFetcher::FetchError: SSL_connect returned=1 errno=0 state=SSLv3
read server certificate B: certificate verify failed
(https://bb-m.rubygems.org/gems/multi_json-1.3.2.gem)
An error occured while installing multi_json (1.3.2), and Bundler cannot continue.
Make sure that `gem install multi_json -v '1.3.2'` succeeds before bundling.
When I try to install the gem manually (by gem install multi_json -v '1.3.2') it works. The same problem occurs with several other gems. I use RVM (1.12.3), ruby 1.9.2, bundler 1.1.3.
How to fix it?
Source: (StackOverflow)
This question already has an answer here:
Tried to perform REST GET through python requests with the following code and I got error.
Code snip:
import requests
header = {'Authorization': 'Bearer...'}
url = az_base_url + az_subscription_id + '/resourcegroups/Default-Networking/resources?' + az_api_version
r = requests.get(url, headers=header)
Error:
/usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/util/ssl_.py:79:
InsecurePlatformWarning: A true SSLContext object is not available.
This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail.
For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
My python version is 2.7.3. I tried to install urllib3 and requests[security] as some other thread suggests, I still got the same error.
Wonder if anyone can provide some tips?
Thanks.
Source: (StackOverflow)
I have a simple web service call, generated by a .NET (C#) 2.0 windows app, via the web service proxy generated by Visual Studio, for a web service also written in C# (2.0). This has worked for several years, and continues to do so at the dozen or so places where it is running.
A new installation at a new site is running into a problem. When attempting to invoke the web service, it fails with the message saying, "Could not establish a trust relationship for the SSL/TLS secure channel". The URL of the web service uses SSL (https://) -- but this has been working for a long time (and continues to do so) from many other locations.
Where do I look? Could this be a security issue between Windows and .NET that is unique to this install? If so, where do I set up trust relationships? I'm lost!
Source: (StackOverflow)