0. As of OpenSSL 1.1.1, providing subjectAltName directly on command line becomes much easier, with the introduction of the -addext flag to openssl req (via this commit).. This post details how I've been using OpenSSL to generate CSR's with Subject Alternative Name Extensions. KeyLength = 2048     ; Valid key sizes: 1024, 2048, 4096, 8192, 16384 You’ll then need to restart Certificate Services. Certificate Signing Request – CSR generation. Verify Subject Alternative Name value in CSR. Subject Alternative Name in Certificate Signing Request apparently does not survive signing. Make sure you choose ‘Computer account’ to manage certificates for on the local computer. My PowerShell script simplifies CSR file creation with alias name support. Submitting the CSR request will let you to download the generated CSR and private key files. The Java keytool does not support export of a private key therefore we will need to use OpenSSL. Author, teacher, and talk show host Robert McMillen shows you how to create a SAN certificate request in 2012 R2. Defined options include an Internet electronic mail address, a DNS name, an IP address, and a Uniform Resource Identifier (URI). My colleague just published a document How to Request a Certificate With a Custom Subject Alternative Name that I strongly recommend reading. ()certReq.Submit(CR_IN_ENCODEANY|CR_IN_FORMATANY,request,sAttributes,CAName ); And the submit is rigth, but when i get the certificate from CA, the subject alternative name not is in the certificate, and so i can't do the logon. Does anyone know how to create a Certificate Request with the 'Subject Alternate Name'? Click Apply The intranet name is different from the internet name. Hod My PowerShell script simplifies CSR file creation with alias name support. Remember to add a valid Host + Domain Name for Common Name (CN), should look like www.yoursite.com or yoursite.com. RequestType = PKCS10 ; or CMC. I have no problem creating a certificate without SAN's. Defined options include an Internet electronic mail address, a DNS name, an IP address, and a Uniform Resource Identifier (URI). To add more names I need to add a 'Subject Alternate Name' field with the extra names listed. It requires the name in a correctly maintained Subject Alternative Name (SAN) field. The command below export the public key to the file servercert.pem: First create the SAN certificate with all values: The command requires the following values for the Subject field: The command requires the following values for the SubjectAltName field (where applicable): The SubjectAltName field with all values: The command below will export the Certificate Signing Request (CSR) into myserver.csr file. In this article, I’ll show you how to create a new Server Certificate with a Subject Alternative Names which means that the Certificate will have multiple names (DNS names).. What is SAN Certificate? What are SAN (Subject Alternative name) Certificates. The command below export the private key to the file serverkey.pem: You will need to provide the keystore password (protected). You may have noticed that since Chrome 58, certificates that do not have Subject Alternative name extensions will show as invalid. The signed certificate can be installed by navigating to Administration >> Certificates >> Server Certificate >> Import Server Certificate. A lot of companies these days are using SAN (Subject Alternative Name) certificates because they can protect multiple domain names using a single certificate. MachineKeySet = True It’s not possible to specify a list of names covered by an SSL certificate in the common name field. This post details how I've been using OpenSSL to generate CSR's with Subject Alternative Name Extensions. The full list of supported values listed in RFC 5280. Select Custom Request – Proceed without enrollment policy and click Next; Click Next; Expand Detail and click on Properties; Enter Name & Description; Select DNS with *.aventislab.com – this will be the SAN (Subject Alternative Name) included in our SSL Certificate; Change the Key Size to 2048 and Check Make Private Key Exportable to be protected by a single SSL Certificate, such as a Multi-Domain (SAN) or Extend Validation Multi-Domain Certificate.. Background. SAN can have multiple common names associated with the certificate. The specification allows to specify additional additional values for a SSL certificate. This is a standard certificate field. A subject alternative name wildcard is also known as a SAN wildcard and a multi-domain wildcard. What if she took that same request file, and re-submitted it? Thanks in advance. But what if Alice acted maliciously. In the Name box, type the fully qualified domain name of the domain controller. A SAN certificate is a term often used to refer to a multi-domain SSL certificate. The Email name is unavailable and cannot be added to the Subject or Subject Alternate name. I created a template where the Subject Name should be supplied in the request. I followed this technet link to create the certificate: Certificate Signing Request – CSR generation. Give a friendly name for the certificate and a description. Amazing, I must have missed the memo on that. The use of the SAN extension is standard practice for SSL certificates, and it’s on its way to replacing the use of the common name.. SAN certificates. SAN is an acronym for Subject Alternative Name; These certificates generally cost a little bit more than single-name certs, because they have more capabilities. The Subject Alternative Name (SAN) is an extension to the X.509 specification that allows users to specify additional host names for a single SSL certificate. I was just wondering if someone could please send me instructions on how to do this. Request SSL Certificate With a Subject Alternative Name (SAN) via enterprise CA with a GUI Leave a reply For those that want to quickly request a new SSL certificate via your Enterprise Certificate Authority, using a GUI instead of certutil commands, here is a tutorial on how to do so. The command certutil -setreg policy\EditFlags +EDITF_ATTRIBUTESUBJECTALTNAME2 is **NOT** recommended as it allows the addition of SANs post request. The SAN allows issuance of multi-name SSL certificates. Instead SSL Certificates required to have Subject Alternative Name (SAN). It requires the name in a correctly maintained Subject Alternative Name (SAN) field. Download both the files and send the CSR file alone to the certificate authority to get it signed. Essentially, it’s a combination of a wildcard SSL certificate and a multi-domain SSL certificate. Thanks. ;EncipherOnly = FALSE For examples, see the sample .inf file. For examples, see the sample .inf file. Save the file as Request.inf. Verify CSR The signed certificate can be installed by navigating to Administration >> Certificates >> Server Certificate >> Import Server Certificate. The ability to directly specify the content of a certificate SAN depends on the Certificate Authority and the specific product. How to easily create a Self Signed Certificate with a SAN (Subjective Alternative Name) with PowerShellInstall the Module if its missing 1. and followed the "To use the Certificate Enrollment wizard with a standalone CA" section. thank's for the reply Steps to request SSL Certificate from Microsoft CA with Certreq. The subject alternative name extension allows identities to be bound to the subject of the certificate. You are welcomed to send the CSR to your favorite CA. Click on Subject tab and add all the hostnames under “Alternative Name“ Under Subject Name, enter the Common Name (CN), Organizational Unit (OU), Organization (O), State (S) and Country (C) values. I have no problem creating a certificate without SAN's. Your solution would have also have worked great for me. Same request file as above, but in addition to automatically populating the certificate’s subject alternative name from AD, let’s say we add our own, in the form a CSR request attribute. How to Request a Certificate With a Custom Subject Alternative Name SANs can be included in the [Extensions] section. Submit the CSR to the CA, now with malicious intent. The subject alternative name extension allows identities to be bound to the subject of the certificate. CA cert with many Subject Alternative Name (SAN) entries, versus individual certs in public production? What is SAN Certificate? To create a Certificate Signing Request (CSR) and key file for a Subject Alternative Name (SAN) certificate with multiple subject alternate names, complete the following procedure: Create an OpenSSL configuration file (text file) on the local computer by editing the fields to the company requirements. Can this be done via Infoblox or do I need to use a 3rd party tool to hack the Certificate Request? Under the tab Private Key choose Key size 4096 and Make private key exportable. The Subject Alternative Name extension was a part of the X509 certificate standard before 1999, … Start an administrative command prompt on one of your intermediate CA server and issue the following command; certutil -setreg policy\EditFlags +EDITF_ATTRIBUTESUBJECTALTNAME2. Prepare an INF file and save it as C:\temp\RequestConfig.inf; Subject – Replace it with CN=FQDN; Private Key is exportable; Certificate = WebServer; Include the additional SAN name under 2.5.29.17 = "{text}" ; SAN – Subject Alternative Name openssl x509 -req \ -sha256 \ -days 3650 \ -in private.csr \ -signkey private.key \ -out private.crt \ -extensions req_ext \ -extfile ssl.conf Add the certificate to keychain and trust it: When you request a SAN certificate, you have the option of defining multiple DNS names that the certificate can protect. A lot of companies these days are using SAN (Subject Alternative Name) certificates because they can protect multiple domain names using a single certificate. These values added to a SSL certificate via the subjectAltName field. The certificate request needs to include two subject alternative names which I can then send to our certificate authority to process. 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