4
votes
1answer
119 views

What are the OpenSSL standard Diffie Hellmann parameters (primes)?

I recently generated some custom Diffie Hellmann parameters which are basically just long (in the below case 4096 bit) primes. Those are then used in the key exchange process. I used the following ...
2
votes
7answers
95 views

How can I allow only authorized browsers to access a website?

I have a website and I want it to be accessible only by authorized clients/browsers (ex. with a certficate). The idea is that the users can only access the webpage in their office's computers ...
1
vote
2answers
72 views

SSL cert minimize downtime key rotation strategy

As you already know, due to the heartbleed bug, we need to perform re-keying on our web servers (>10), before I do that, I want to check if my proposed strategy is a proper way or not a. Generate a ...
1
vote
1answer
325 views

Heartbleed detection [duplicate]

It is fairly easy to detect the heartbleed exploit if it all happens over cleartext, which it seems most things are doing for the time being. However, I believe that there are some heartbleed ...
53
votes
3answers
5k views

Heartbleed: Why does the client supply the length of the message at all?

"The fix for this bug is simple: check that the length of the message actually matches the length of the incoming request." Why do we even have the client report the length at all? If we can know ...
-1
votes
0answers
23 views

Heartbleed & SSL Certificates - What do we do to protect ourselves as end users? [duplicate]

I seem to be hearing a lot of mixed opinions on this subject, so I figure I will turn to you guys for some advice. From my understanding, we should consider any SSL certificate (generated by openssl) ...
3
votes
3answers
804 views

Heartbleed - Read only the next 64k and hyping the threat

My understanding of the Heartbleed vulnerability is that there is no bounds check on the payload length/buffer size so the server can read into memory outside of its process space. But can the start ...
0
votes
0answers
58 views

how to setup apache http server with the vulnerable openssl [migrated]

Actually I just want to do some test, so I want to setup an apache http server with the vulnerable (specifically with heartbleed bug) openssl, I'd better do it from source. Does anyone know how to ...
10
votes
2answers
984 views

Does having 2-factor authentication help with HeartBleed?

I was talking with a friend about HeartBleed, and he mentioned that he had 2-factor authentication enabled on all the sites that supported it, so even with his username and passwords, nobody would be ...
2
votes
1answer
605 views

Heartbleed - Blown out of proportion? [duplicate]

From what I gather you need local memory based access correct to even access the private key? Is all this talk and worry of "Was I hacked?!" "Heartbleed just made you full hackable" ect... really over ...
1
vote
1answer
186 views

OpenSSL exploit [closed]

I have read about recent vulnerability in openssl. I tried to exploit one of my cloud servers where I run my web sites. I managed to get 64 KB of data. But what I managed to get was only HTML, CSS, ...
9
votes
1answer
662 views

Are networks using EAP-TLS affected by Heartbleed?

Does the Heartbleed bug affect WiFi networks secured by WPA2-EAP in TLS mode? Since it's using TLS to secure connections between the server and clients, is it possible to attack the server using the ...
55
votes
4answers
20k views

Does Heartbleed mean new certificates for every SSL server?

If you haven't heard of the Heartbleed Bug, it's something to take a look at immediately. It essentially means that an attacker can exploit a vulnerability in many versions of OpenSSL to be able to ...
1
vote
2answers
55 views

Why has public key certificate “Trust anchor”, why is it SPoF vulnerable?

When you look at currently used concept of Root CA (primarily in SSL/TLS context), you can see SPoF vulnerability, which means, if your private key is disclosed, you automatically lose whole chain. ...
0
votes
1answer
981 views

SSL Handshake failed

I’m working on windows desktop application which is created using C++ (IDE : Qt creator). It has login panel, where i do user validation via https connection using openssl 1.0 library. Application is ...
0
votes
1answer
63 views

How does a CA add www and raw domain names to my cert when my CSR doesn't have them?

I'm in the process of buying an SSL cert, and I'm confused by this part: Many CAs say they'll add www. to your domain, so that e.g. if you buy a single-domain cert app.example.com, they'll also add ...
0
votes
2answers
154 views

Is using an SSL Session ID along with a cookie based session verification more secure or not really?

I am using Django which is a web framework for Python. I love it but the session handling is cookie-based. Now over SSL I'm sure it's reasonably "secure" but I don't think there is any kind of fail ...
3
votes
1answer
357 views

OpenSSL Secure Renegotiation

Has anyone tried to do secure renegotiation on OpenSSL and verify it using WireShark? I can't seem to do a secure renegotiation as far as RFC 5746 is concerned. I tried to issue the connection ...
0
votes
3answers
203 views

Trust a non-root CA in OpenSSL

Is it possible to have OpenSSL trust a non-root CA such that a certificate signed by that non-root CA can be properly verified? I've noticed that the default behavior for OpenSSL is to only verify ...
0
votes
1answer
379 views

OpenSSL get key length of all certs [closed]

I am trying to ensure that all certificates in a chain for a host have a key length of 2048 bits. Using openssl s_client, only the key length for that host's cert is given, is there a simple way to ...
1
vote
3answers
288 views

TLS 1.2 Server certificate and signature_algorithms

In the specification for TLS 1.2, it says the following: If the client provided a "signature_algorithms" extension, then all certificates provided by the server MUST be signed by a hash/signature ...
0
votes
1answer
41 views

How to properly implement TLS on an ejabbered server

The official ejabbered documentation instructs the user to generate a self-signed certificate like this: openssl req -new -x509 -newkey rsa:1024 -days 3650 -keyout privkey.pem -out server.pem openssl ...
0
votes
2answers
507 views

Do i need SSL certificate signed by a CA for hybrid mobile apps?

I have just stepped into ssl domain and started exploring how to implement ssl. My question is i understand ssl certificates signed by CA actually allow the client or browser to validate that the ...
0
votes
1answer
627 views

“Must have” and “Preferred Cipher” suites terminology

I have received the following advise to set cipher suites to suitably mitigate Beast attack on a newly setup Apache HTTPD server. Preferred ciphers: RC4-SHA, RC4-MD5 Must Have Ciphers: ...
3
votes
1answer
103 views

FIPS compliant application based on OpenSSL

Let's say I need to write a simple application for signing/checking some data. The hard part is, that it must be FIPS 140-2 compliant. I was thinking to do it using OpenSSL FIPS Object Module 2.0 but ...
3
votes
1answer
522 views

What could be the order of these ciphers following as first criteria the security and just then the performance?

I need some guide to decide in which order I must put the following ciphers if I want prioritize security and in cases of tied, consider performance to decide. ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 ...
0
votes
3answers
3k views

How force that all connections to my Apache use TLSv1.1 or TLSv1.2?

I tested on Ubuntu 12.04 (apache 2.2.22-1ubuntu1.4 and openssl 1.0.1-4ubuntu5.10) and Ubuntu 13.04 (apache 2.2.22-6ubuntu5.1 and openssl 1.0.1c-4ubuntu8.1). here explain how to do so, but I have the ...
4
votes
2answers
246 views

Is cookie information hackable by “Man in middle” Attack over HTTPS?

Just I want to know, is it possible to extract header data by 'Man in middle attack' in HTTPS connection and is there any other way or hack to achieve same thing? If there is way to hack, is it ...
1
vote
1answer
260 views

OpenSSL DH modp size

If OpenSSL is configured to use a DH for key exchange, e.g. TLS_DHE_RSA_WITH_AES_128_CBC_SHA, where does it take the size for modp (or even modp itself) from? The following is a screenshot from ...
0
votes
1answer
598 views

OpenSSL: Enable cipher suites per protocol version

Is there a way to explicitly configure OpenSSL to allow AES (or in general, block ciphers) only for clients that use a TLS version >= 1.1? This would protect against the BEAST attack, while still ...
-3
votes
1answer
157 views

Different AES 256 algorithms produce different results?

I've tried 3 AES 256-bit CBC encryption programs, and I seem to be getting different results for each one with the same 32-character password, which consists of all @ signs. They are: Polaris SSL ...
0
votes
1answer
153 views

Are there any risk in serving static assets via compressed SSL protocol from 3rd party domain?

e.g. curl -v -H 'Accept-Encoding: gzip' 'https://cdnjs.cloudflare.com/ajax/libs/Colors.js/1.2.2/colors.min.js' As you can see, result is gzipped. My assumption is since they are serving from 3rd ...
3
votes
1answer
3k views

Getting “SSL: alert [”write“]: fatal : bad record mac” during openssl Handshake

I am getting SSL: alert ["write"]: fatal : bad record mac from the OPENSSL logs during the handshake and Client is not sending the Application data and its creating the handshake again and again. ...
6
votes
5answers
2k views

SSL/TLS - Distinction between self-signed cert and self-signed CA, and other questions?

I have a small personal website which I wish to serve securely over HTTPS. At the moment I do not wish to use a third party CA to sign my certs. I was reading this document on generating a self-signed ...
5
votes
3answers
2k views

Can someone explain a little better what exactly is accomplished by generation of DH parameters?

I'm setting up a node.js server: https.createServer({ ... ciphers: 'ECDHE-RSA-AES128-SHA256:AES128-GCM-SHA256:RC4:HIGH:!MD5:!aNULL:!EDH', honorCipherOrder: true }, app).listen(443); ...
7
votes
2answers
3k views

Decrypting TLS in Wireshark when using DHE_RSA ciphersuites

How can I decrypt TLS messages when an ephemeral Diffie-Hellman ciphersuite is used? I am able to expose the premaster secret and master secret from the SSL Client. Using that, how to decrypt the ...
3
votes
2answers
599 views

What is the difference between SSL and X.509 Certificates?

I used openssl to create a X.509 certificate but I don't quite understand the relationship between a X.509 and a SSL certificate. Are they the same? Is a SSL certificate just a X.509 certificate that ...
1
vote
0answers
36 views

Using SSL on my sites for everything or just some things? [duplicate]

I have a server which provides a few services through the web, some of those services must be logged into to be able to use them. For these services I have implemented SSL using level 3 CACert ...
5
votes
2answers
2k views

How to set “Not Before” value to past when creating certificate request

We have lots of embedded TLS clients on the field. TLS Servers must be authenticated. Because long power cuts may reset clock of those devices, we have requirement to use certificates with validity ...
0
votes
1answer
506 views

How configure tomcat 7 SSL to use AES-NI?

My server has AES-NI and I would like tomcat 7 to make use of this but I am not really sure how to make that happen or where to even start looking. I am quite familiar with tomcat administration, and ...
3
votes
1answer
1k views

Which extensions to use for a S/MIME certificate?

Analogously to the SSL server certificate question, which extensions should I use for S/MIME, and should the CA be restricted somehow as well? (I'm using openssl, which at the moment creates CA and ...
4
votes
2answers
2k views

Extensions for SSL server certificate

I have some question about the X.509 v3 extensions. What extensions should appear in a proper certificate for a SSL server ?
3
votes
1answer
66 views

Signing CertificateRequest with special privileges

Well, I am not sure if I specified the question correctly. While I was browsing web, I checked several SSL certificates and noticed that even Root Certificate doesn't have set all attributes of ...
1
vote
2answers
1k views

openssl, create RC4-SHA certificate

gmail.com Google, fb,... use RC4-SHA. How does one create RC4-SHA self signed cert ? Or even with aes128 key ? I tried using using "genrsa -aes128", resulting cert was DHE-RSA-AES256-SHA openssl ...
2
votes
1answer
483 views

Are there any functional differences in the implementations of OpenSSL, GnuTLS, Java's TLS, and .NET's TLS?

Question Are there any functional (or detectable) differences between the various implementations of SSL/TLS? What are the differences between them? (e.g. which ones implement "False Start") ...
3
votes
1answer
309 views

Are SSL Certificates (Private and Public key) generated by OpenSSL and makecert compatible?

Are RSA SSL Certificates (Private and Public key) generated by makecert compatible with OpenSSL decryption ie. can I decrypt them with the openssl_* methods? I am working on two-way SSL authentication ...
3
votes
0answers
160 views

How secure is HTTP basic authentication over SSL? [duplicate]

Possible Duplicate: Is BASIC-Auth secure if done over HTTPS? I want to set up a web server on a computer at home which will basically do no more than send the browser a file which contains ...
1
vote
1answer
2k views

How do I use OpenSSL with the Java Keytool?

I believe I understand how OpenSSL works, and I believe I have a good game plan for setting up an SSL server on my private network, but before I go through the process of downloading and configuring ...
2
votes
1answer
690 views

Generate one CSR for two Windows servers

I have two Windows 2008 R2 servers which will be hosting a load balanced website. I will generate a private key and use it to generate a CSR using OpenSSL. How can I make this CSR (or the resulting ...
4
votes
4answers
568 views

Clients trust my custom CA

I'm sorry if this is a dumb question. I'm new to all this. I have a large number of users. I need to be able to generate SSL certs for various internal domain names. All of these certs need to be ...