Questions tagged [certificates]

A piece of data used in public key cryptography (specifically public key infrastructures) that contains identifying information (i.e. email address or web address), a hash of a public key, and a digital signature that authenticates the data in the certificate. For questions specifically about [x509], [certificate-authority], or [public-key-infrastructure], please use those tags.

217 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
9
votes
0answers
382 views

SolarWinds Orion SAML compromise mass cert update

SolarWinds Orion customers have suffered some network compromises according to news reports. One report says, right at the end of the article, that SAML2.0 signing certificates may have been ...
7
votes
1answer
2k views

iOS & Android Certificate Pinning with Lets Encrypt

We use cert pinning when developing for iOS and Android. We use regular 12 month certs that are paid for. We recently switched to Lets Encrypt (LE) for our general website certificates and would like ...
7
votes
1answer
503 views

TLS connection to untrusted server - client reaction for dropping connection standardized?

I played around with a man-in-the-middle proxy tool and connected different smart phones to it. As the proxy uses a self signed certificate the tested smartphone apps did not accept the presented ...
6
votes
0answers
2k views

What Key Usage values are required to support Code Signing?

I have a .pfx that I want to use to sign a Clickonce app. However, on trying to do so, Visual Studio gives me "The selected certificate is not valid for code signing." When I go to certmgr.msc and ...
4
votes
0answers
1k views

Use self-signed certificate inside of Docker Container for localhost

I've created a self-signed certificate for localhost to use https. I'm running an Apache Docker container which uses the self-signed certificate and the private key. I then installed the certificate ...
4
votes
1answer
644 views

Using NameConstrains in a CA certificate

I am trying to do something similar to what has been pointed out in this nice answer by Jonathon Reinhart. I have a CA certificate with Name Constrains (RFC): Permitted [1]Subtrees (0..0): ...
4
votes
0answers
156 views

.net website using certificate with .com

I found a website where all browsers navigate to just fine and do not complain about the certificates. When i inspect the certificate i noticed something i hadn't thought i would see. the website foo....
4
votes
0answers
417 views

Untrusted connection when logging to stack exchange sites

I was able to log into various stack exchange sites with no problem, but as of today 1/5/2016 I'm getting the following error message with firefox 43.0.2: You have asked Firefox to connect securely ...
4
votes
0answers
166 views

What are the formal methods to analyze Authentication Protocol

I designed an authentication protocol for consumer-producer applications, which barrows features from Kerberos and Tesla. To check the strength of protocol I considered different well known attacks ...
4
votes
0answers
1k views

Safe communication via rest api between two known servers

I'm using Kinvey as backend but because it doesn't provide the ability to run custom code I have set up another server. So basically when x happens on Kinvey server, I send a call to my rest api on ...
3
votes
0answers
56 views

Phishing? All websites show the same, wrong certificate

today I went to my Online-Banking by typing in the correct domain name in Firefox. I could login and even see my actual balance. Then within the site a warning appeared that I should do a test-...
3
votes
0answers
113 views

Using TPM to generate certificates associated with different users on the same device

I plan to use the TPM to generate CSR's backed by a private key stored on the TPM. The CSR's will then be signed by an external HSM. Since a certificate is tied to a particular private key, how do you ...
3
votes
0answers
119 views

What are the risks of trusting a certificate that is not logged in CT logs?

A website that I do banking on has a login page on a different subdomain than their main website, and this login page is secured with an Amazon-issued domain-validation certificate (their main website ...
3
votes
0answers
116 views

Is this nginx config suitable to enforce proper authorization?

Scenario I have a website secret.example.com, which contains information which must not be disclosed to third parties. In order to protect the information, TLS client authentication was chosen. ...
3
votes
0answers
198 views

How does Cloudflare negotiate its server certificate?

When I access https://example.com on my company's laptop that has a X509 client certificate installed, using my home internet connection, without using a VPN, the requested page is signed using the ...
3
votes
0answers
107 views

What is the maximum amount of certificates that can be pinned with HPKP?

We are currently looking into enabling HTTP Public Key Pinning on our website. The problem we are currently facing is that our certificates last only 90 days, but we have devised the following steps ...
3
votes
0answers
341 views

Why does the TLS Client have to send the digital signature over all previous handshake messages in CertificateVerify?

TLS (non-anonymous) Handshake requires the Server to sign the ServerKeyExchange message so that the Client can authenticate the Server using the public key present in the Server Certificate. However, ...
3
votes
1answer
566 views

OCSP recording with JMeter

How can I record an application which is using OCSP security with the help of JMeter? I am not able to record the application i.e. a native app with the help of JMeter as it is using OCSP protocol ...
3
votes
0answers
533 views

Windows certificate verification with timestamping

I have been trying to replicate the behaviour of the Digital Signatures tab on windows file properties. I'm using WinVerifyTrust api and X509Certificates namespace to achieve my goal. I've managed to ...
3
votes
0answers
813 views

How to generate "CRL numbers" for X.509 CRL

(Context: I'm working a process to publish a CRL periodically -- eg once every day.) With standard X.509 certificates, "serial numbers" are required to be positive integers, but they do not need to ...
3
votes
0answers
670 views

1.3.6.1.5.5.7.1.12 Logotype extension - how can it be generated from openssl command line

If you look at this subCA Certificate from Verisign http://www.tbs-certificats.com/FAQ/en/495.html?p=en/495.html It has the following field 1.3.6.1.5.5.7.1.12: 0_.].[0Y0W0U..image/gif0!0.0...+......
2
votes
1answer
61 views

How to set up certificate architecture for on-premise server-client application

We are currently shipping a product to our customers that is server-client-based running on Windows server 2016 (server) and Windows 10 (clients). The server is installed on-premise in our customer's ...
2
votes
0answers
70 views

Does the SSL/TLS lifetime change affect client certificates?

From 2020.09.01 Google, Apple an Mozilla changed the maximum trust time to 398 days. I'm working on a project, where the client also authenticates itself with a certificate. This certificate is stored ...
2
votes
0answers
137 views

Why don't CAs advertize public keys of verified entities on a central location instead of giving out signed certificates?

If CAs (Certification Authorities) start advertizing public keys of verified websites via some API, browsers can simply query them for each domain instead of asking websites to give them certificates ...
2
votes
0answers
105 views

Public key stored in server is different from what is shown in OpenSSL

I obtained an SSL certificate from LetsEncrypt for my web application using Apache web server. LetsEncrypt generated these 4 files: cert.pem chain.pem fullchain.pem privkey.pem As I understand, ...
2
votes
0answers
129 views

openSSL shows a revoked certificate as secure

I downloaded a revoked certificate from the website https://www.ssl.com/sample-valid-revoked-and-expired-ssl-tls-certificates/. Specifically, the revoked certificate of the site https://revoked-rsa-ev....
2
votes
0answers
782 views

Firefox SSL_ERROR_BAD_CERT_DOMAIN but the names are correct

Today I've create new certificates for my server (since the old ones were about to expire) using openssl with my own CA. I also used that as an oportunity to change the server's name because it was ...
2
votes
0answers
318 views

RFC 5280 compliant certificate with x509 extensions

First time posting here, be gentle. Situation: I have a requirement, to link our printer/scanner to our Azure AD (so that it can lookup users etc.). I have enabled Azure AD Domain Services with LDAP ...
2
votes
0answers
361 views

Can I sign with two Code Signing certs to build reputation on the newer one?

I recently acquired a Microsoft Authenticode Code-signing certificate as a new certificate using an identical name to another one which will expire soon. Obviously, the new certificate has no ...
2
votes
2answers
190 views

WPA2 Enterprise: no risks for preconfigured clients when it comes to Rogue APs?

We are using, as default, PEAP and MS-CHAPv2 as inner authentication. I was concerned with security risks when it comes to rogue APs but a colleague told me that there are no risks for preconfigured ...
2
votes
0answers
275 views

Delegating SSL certificate requests to a third party

I'm wondering what best practices are regarding delegating the authority to approve SSL certificate issuance. One of our vendors (www.vendordomain.com) will soon host a Web application for us (www....
2
votes
2answers
447 views

Wi-fi Certificate Permission and Access to phone/data

There are several questions addressing similar questions, but not quite the same (others ask about MITM Attacks). They also state conflicting and opposing answers/responses, so I ask here 3 specific ...
2
votes
0answers
537 views

Storing Wireless auth certs in a TPM

Within my organisation we're being asked to provide a secure but seamless wireless experience e.g. user logs on to Windows device and are connected automatically to corporate network via wireless. ...
2
votes
0answers
124 views

Custom keystore/certificate to hold asymmetric (RSA) keys

My app will require maintaining an RSA keypair locally on the user's machine. I was a bit disappointed to discover that PKCS#12 and JKS don't offer higher than 3DES (correct me if I have this wrong). ...
2
votes
0answers
98 views

How can I create a verifiable signature for a digital transaction?

I am currently working on creating a digital signature pad that customers can sign instead of a traditional paper receipt for credit card transactions. Currently I have the ability for them to sign a ...
2
votes
0answers
457 views

Resolving dupe CA certs in keystore

Consider a keystore in which are loaded two duplicate CA Root certificates. They have the same Issuer/Subject DN and the same key. The major difference is that one expires in 2019 and one expires ...
2
votes
0answers
426 views

Which entriey does a Card Verifiable Certificate contain?

Which entries e.g. public key, valid until, etc. does a CVC has and where can I find a good explanation of this elements? - also with the size, which an entry and related to that, which size the ...
2
votes
0answers
517 views

Simple private AKKA encryption certs

There are several questions on stackoverflow regarding Akka, SSL and certificate management to enable secure (encrypted) peer to peer communication between Akka actors. The Akka documentation on ...
2
votes
0answers
196 views

Does any SSL certificate vendor allow custom expiration date while creating the SSL Certificate?

The public SSL certificate vendors (Comodo, Thawte, etc.) allow you to create certs that expire after a certain fixed period (1 yr, 2yr, 3yr, etc.) from the date of creation. However, I would like ...
2
votes
0answers
79 views

Windows NPS: Policy should check Issuing CA

I have some trouble in configuring a Windows NPS, maybe anybody of you have an idea. Is it possible for NPS to check whether a client certificate was signed by a specific issuing CA? I have two ...
2
votes
0answers
256 views

Security Concerns of importing SharePoint Root Authority to Trusted Root Certification Authorities store

We are experiencing slowness because of SharePoint's STS certificate CRL checking. This is a known issue and there is a Microsoft Workaround for it: https://support.microsoft.com/en-us/kb/2625048 The ...
2
votes
0answers
7k views

SSL self signed certificate CER exception added to Keychain but fails in Chrome

Operating System: Mac OSX El Capitan 10.11.5 When browsing to the page I have a Privacy error, although an exception was added. I have the correct CER file so I added it to my Keychain TRUST THE CERT ...
2
votes
0answers
202 views

Finding the EMSA-PKCS1-v1_5 DigestAlgorithm field in the x509 certificate

From the RFC - https://www.ietf.org/rfc/rfc3447.txt A.2.4 RSASSA-PKCS1-v1_5 For each OID, the parameters field associated with this OID in a value of type AlgorithmIdentifier shall have a value ...
2
votes
0answers
202 views

Problem using custom CryptoNG KSP on IE 11

We are currently developing a custom KSP (Key Storage Provider) for a Key Storage System. We successfully developed a CSP (CryptoAPI) and a KSP (CryptoNG) provider, and both work really fine for ...
2
votes
0answers
109 views

Windows IIS Event/Security Log ID of Private Key deletion of corresponding TLS certificate?

I'm in the middle of writing an MS Active Directory Certificate Services Key Management Lifecycle document for my organization. The primary purpose certificates will serve for this organization is to ...
2
votes
0answers
167 views

Security implications of CA signed SSL cert for local development

Curious to know the security implications and potential risks involved with getting a CA signed cert for localdev.mydomain.com, and issuing it to all the developers who might need to spin up a local ...
2
votes
0answers
388 views

OAuth2 Authorization and Resource server certificates

I'm implementing a custom IAuthorizationServerHost using DotNetOpenAuth library. Example implementation uses two certificates for CreateAccessToken (see Listing 6): public AccessTokenResult ...
2
votes
0answers
601 views

Does Mac OS X 10.8+ support self-signed Package Installer

I'm not sure whether self-signed Package Installer are supported by Mac OS X 10.8+ Using informations in How to create an Apple Installer Package Signing Certificate I could create a Package ...
2
votes
1answer
1k views

Chrome Internal Certificate Authority List for SSL + EV

Chrome specifies that it maintains a internal "hard-coded" list of root certificates that are "EV-Qualified". https://www.chromium.org/Home/chromium-security/root-ca-policy#TOC-Extended-Validation-...
2
votes
2answers
2k views

Getting Certificate KeyContainerName to initialize CspParameters

How can I get the name of a Key Container that's in a smart card required for initialization of CspParameters? CspParameters^ cspa = gcnew CspParameters(ProviderType, ProviderName, keyContainerName, ...

1
2 3 4 5