$ openssl x509 -in example.crt -text -noout | grep -A1 'Subject Alternative Name' X509v3 Subject Alternative Name: DNS:www.example.com, IP Address:1.2.3.4 (承認された解決策とそのコメントへの功績によるものだが、私はCSRにも署名する方法を詳しく説明することが役に立つかもしれないと … Since version 58, Chrome requires SSL certificates to use SAN (Subject Alternative Name) instead of the popular Common Name (CN), thus CN support has been removed. [alt_names] Certificate: Public Key Algorithm: rsaEncryption X509v3 Subject Alternative Name: ----- There are 2-ways to setup this (as far as I know) – using Subject Alternative Names and Server Name Indication (SNI) In this article, we will use “Subject Alternative Names” method. X509v3 Key Usage: Public-Key: (4096 bit) ~~~~~~省略~~~~~~ [root@localhost serverAuth]# openssl x509 -in server3.csr -text -noout openssl genrsa -out server.key 2048 openssl req -new -out server.csr -key server.key 次のコマンドで CSR 内の SANs を確認する。(中にちゃんと ‘Subject Alternative Name’ があるかな?) openssl req -text -noout -in server.csr Not Before: Jun 10 10:02:48 2018 GMT (2015-03-25 01:12:44 +09:00 版) Public-Key: (4096 bit) Reduce SSL cost and maintenance by using a single certificate for multiple websites using SAN certificate. ~~~~~~省略~~~~~~ updated at 2018-09-11 SAN (Subject Alternative Name) のオレオレ証明書 Linux SSL openssl 証明書 More than 1 year has passed since last update. Email Address []: Common Name (eg, your name or your server's hostname) []:kaede.jp Signature Algorithm: sha256WithRSAEncryption # openssl req -noout -text -in ban21.csr | grep -A 1 "Subject Alternative Name". In the SAN certificate, you can have multiple complete CN. [/text] For some fields there will be a default value, Not After : Jun 10 08:18:01 2019 GMT SAN stands for “Subject Alternative Names” and this helps you to have a single certificate for multiple CN (Common Name). ', the field will be left blank. 1b:79:83:43:67:b2:3e:a4:91:cb:a1:b5:8f:6a:0e: Modulus: DNS:kaede.jp, DNS:aaa.kaede.jp, DNS:bbb.kaede.jp, DNS:ccc.bbb.kaede.jp, IP Address:192.168.1.1, IP Address:192.168.2.15 [/text], サーバの証明書の作成は「openssl req」で実施 ECDSAで実施したい場合は「-newkey rsa:4096」を「-newkey ec:<(openssl ecparam -name 【曲線の種類】)」に変更すれば可能です。, [text] Subject Alternative Name (SAN) is an extension to X.509 that allows various values to be associated with a security certificate using a subjectAltName field. ........................................................................................................++ The certificate name can be in two locations, either the Subject or the Subject Alternative Name (subjectAltName) extension. The link I included talks about making a configuration file, which allows you to include SAN in your CSR. ####DNS.〇の順にマルチドメインを追記する。〇は数値 I have added this line to the [req_attributes] section of my openssl.cnf:. You may have noticed that since Chrome 58, certificates that do not have Subject Alternative name extensions will show as invalid. Public Key Algorithm: rsaEncryption -newkey rsa:4096 -keyout server3.key -nodes -x509 -days 365 -out server3.csr \ Data: As you can see, the resulting certificate has a separate Subject Alternative Name field. Create a Certificate Signing Request (CSR) "openssl req -newkey rsa:2048 -keyout server_key.pem -out server_req.pem" Review the CSR to verify the Subject Alternative Name has been added as expected "openssl req -text -in server_req.pem" Add an subject alternative name to SSL certificate with openssl Dr. Xi. Subject Public Key Info: 1. Not After : Jun 10 09:29:01 2019 GMT A CSR or Certificate Signing Request is a … Issuer: C=JP, ST=Osaka, L=Osaka, O=Kaede, CN=kaede.jp Common Name (eg, your name or your server's hostname) []:kaede.jp 自己署名なSSL証明書を作成する方法を、メモとして書いておこうと思いまして。テストあたりで、使ったりしますしね。, ApacheなどのWebサーバーで使う場合、起動時にパスワードが求められるのが嫌なら解除する方法も。, challenge passwordは、通常空欄のままにしておきます。それ以外は、適宜設定。, Common Nameに「*.example.com」のように、「*」を含めたものにすると、ワイルドカード証明書になります。, 通常、OpenSSLで作成するSSL証明書は、ひとつのSubjectを持ち、ひとつのホスト名に対してのみ有効です。, ですが、X509拡張のSAN(Subject Alternative Name)を使用すると、複数のホスト名に対応させることができます。, 複数ホスト名に対応させる場合は、次のようなテキストファイルを用意します。ファイル名は、なんでもいいです。 Public-Key: (4096 bit) 2d:17:32:85:40:4b:fb:df Signature Algorithm: sha256WithRSAEncryption a8:e2:e7:94:c8:29:22:b4 Generate a key Version: 3 (0x2) [root@localhost serverAuth]# openssl x509 -in server2.csr -text -noout X509v3 extensions: [root@localhost serverAuth]# openssl req -new -newkey rsa:4096 -keyout server2.key -nodes -x509 -days 365 -out server2.csr \ into your certificate request. Note: While it is possible to add a subject alternative name (SAN) to a CSR using OpenSSL, the process is a bit complicated and involved. This is a cert that will be accepted by every major browser (including chrome), so long as you install the certificate authority in the browser. `openssl`: Subject Alternative Name. $ openssl genrsa -out ${SHORT_NAME}.key 4096 Generate Server CSR Now we will generate the certificate request using the domain Key and the domain answer file which we created in the beginning of the this tutorial. Apparently, this tool does not support creating self-signed SSL certificate with Subject Alternative Name (SAN). A SAN certificate is a term often used to refer to a multi-domain SSL certificate. What you are about to enter is what is called a Distinguished Name or a DN. IP.1 = 192.168.1.1 Generate the certificate. 1a:10:ef By adding DNS.n (where n is a sequential number) entries under the “subjectAltName” field you’ll be able to add as many additional “alternate names” as you want, even not related to the main domain. DNS.3 = bbb.kaede.jp 99:7b:97:01:21:24:8e:65 | When I inspect that CSR with openssl req -in key.csr -text I can see a corresponding section:. Amazing, I must have missed the memo on that. There’s a clean enough list of browser compatibility here.. Changing /etc/ssl/openssl.cnf isn’t too hard. When present in the Subject, the name that is used is the Common Name (CN) component of the X.500 Distinguished Name (DN). Firefox & Chrome now require the subjectAltName (SAN) X.509 extension for certificates.. There are quite a few fields but you can leave some blank writing new private key to 'server2.key' > -extensions SAN -reqexts SAN -config <(cat /etc/pki/tls/openssl.cnf \ In additioanl to post “Demystifying openssl” will be described alternative names in OpenSSL or how to generate CSR for multiple domains or IPs. Create X509 certificate with v3 extensions using command line tools. `openssl`: Subject Alternative Name. X509v3 Subject Alternative Name: DNS:foo.example.com, DNS:bar.test.com, DNS:localhost 2-2. Note 1: In the example used in this article the configuration file is req.conf. X509v3 Subject Alternative Name: DNS:my-project.site and Signature Algorithm: sha256WithRSAEncryption Generate the certificate openssl x509 -req \ -sha256 \ -days 3650 \ -in private.csr \ -signkey private.key \ -out [/text], コマンドライン上から実行するのは今のところ難しいですかね。 ......................................................++ Ah, did not read the link. Signature Algorithm: sha256WithRSAEncryption The Subject Alternative Name (SAN) is an extension the X.509 specification. Country Name (2 letter code) [XX]:JP Email Address []: Organization Name (eg, company) [Default Company Ltd]:Kaede openssl req -text -noout -verify -in server.example.com.csr. 00:df:4b:e7:a4:60:01:69:4e:9b:db:47:f2:fb:85: Self-Signed OpenSSL Certificates with Subject Alternative Name April 11, 2014 by simon 2 Comments I had all sorts of fun today trying to get Subject Alternative Names working with my OpenSSL Apache server. State or Province Name (full name) []:Osaka csr \ -signkey private. 2 openssl commands in series openssl genrsa -out srvr1-example-com-2048.key 4096 openssl req -new -out srvr1-example-com-2048.csr -key srvr1-example-com-2048.key -config openssl-san.cnf; Check multiple SANs in your CSR with OpenSSL. [root@localhost serverAuth]# /opt/openssl/1.1.1/bin/openssl version Subject Public Key Info: Note: In the example used in this article the configuration file is "req.conf". 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. Subject Public Key Info: Country Name (2 letter code) [XX]:JP $ echo|openssl s_client -connect google.com:443 2>/dev/null | openssl x509 -noout -text | grep "Subject Alternative Name" -A2 | grep -Eo "DNS:[a-zA-Z 0-9. Subject Alternative Name: Using the X.509 subjectAltName extension has been useful to address some of the limiations of wildcard domains, namely they can contain multiple FQDNs of all types so names with differing numbers A corresponding section: Extensions: X509v3 Subject Alternative Name field resulting certificate has a Subject. Amazing, I must have missed the memo on that that do not have Subject Alternative Names ( SANs.. 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