If you want to verify a certificate against a CRL manually you can read my article on that here. -verify_email email Verify if the email matches the email address in Subject Alternative Name or the email in the subject Distinguished Name. On Linux and some UNIX-based Operating Systems, OpenSSL is used for certificate validation, and usually is at least hooked into the global trust store. Each SSL certificate contains the information about who has issued the certificate, whom is it issued to, already mentioned validity dates, SSL certificate’s SHA1 fingerprint and some other data. $ openssl s_client -connect localhost:4433 CONNECTED(00000003) depth=0 (subject) verify error:num=20:unable to get local issuer certificate verify return:1 depth=0 (subject) verify error:num=27:certificate not trusted verify return:1 The following commands help verify the certificate, key, and CSR (Certificate Signing Request). To make sure that you have installed the SSL certificate correctly, we have have compiled a cheatsheet with OpenSSL commands to verify that multiple protocols use the correct certificate. 多くのWebサイトがHTTPS化されることで発生するトラブルが「正しくSSL証明書が設定されていない」事によるWebサイトの表示ができないというトラブルです。SSL証明書をインストールしても正しい設定ではない場合、Webブラウザでエラーを表示したり通信に失敗する場合があります。, SSL証明書が正しく反映されたかを確認する方法として、Webブラウザの鍵マークから証明書の情報を表示して確認する方法があります。 この方法で検証した場合とopensslで検証した場合で何が違うでしょうか。, Webブラウザによっては、接続するSSL証明書に記載されている Authority Information Access 拡張フィールドから、必要な中間証明書を自動でインストールする機能を持つものもあります。 これにより有効期限が切れた中間証明書をインストールしていたり、中間証明書のインストールミスがあっても、Webブラウザでは表示されますのでトラブルに気がつきにくいという問題があります。, 全てのWebブラウザが中間証明書の自動インストールに対応しているわけではなく、スマートフォンなどのブラウザではエラーになることがあります。 このため、Webブラウザの鍵マークでの検証ではなく、opensslでの検証をオススメします。, 公開前にSSL証明書のチェインが正しいかを確認するには以下のコマンドを実行します。, コマンドを実行して「OK」が表示されれば証明書のチェインに問題ないことが確認できます。, Webサーバーやメールサーバーに設定した証明書が正しく機能しているか確認するためには、opensslコマンドを使用して次のように実行します。, www.infocircus.jp のSSL証明書を検証した結果は、次のようになります。, 検証で depth=X の表示になっている部分は、証明書のツリーを表しています。 depth=0がオリジナルの証明書、depth=1... とルート証明書までのツリーが確認できます。, 上記の例では、depth=0でCN=www.infocircus.jpとなり、depth=1(1つ上位)でCN = Let's Encrypt Authority X3、depth=2でルート証明書のCN = DST Root CA X3を示しています。, Verify return code が 0(ok)となっていますので、SSL証明書が正しく検証されていることが確認できます。 この Verify return codeが、0(ok)でない場合、SSL証明書の設定に間違いがあるか、指定している証明書が不正の可能性があります。, 実際にSSL証明書の検証に失敗するとどうなるのか、いくつか代表的な例をご紹介いたします。, SSL証明書の有効期限が切れている場合には、Verify return codeで次のようなエラーとなります。, メールサーバーのSMTP(TLS接続)でSSL証明書の確認を行うには、次のコマンドを使用します。, 実際にメールサーバーの証明書を確認した結果が次の通りです。 サンプルのため、サーバー名は変更してあります。, これで、Webサーバー(HTTPS)とメールサーバーのSSL証明書の検証ができました。, if( location.protocol == "https:" ){ Check an MD5 hash of the public key to ensure that it matches with what is in a CSR or private key openssl x509 SSL証明書の有効期限が切れている場合には、Verify return codeで次のようなエラーとなります。 Start Time: 1571797141 Timeout : 7200 (sec) Verify return code: 10 (certificate has expired) 中間証明書のチェインが不正な場合 document.write ( '' ); Later, the alias openssl-cmd(1) was introduced, which made it easier to group the openssl commands using the apropos(1) command or the shell's tab completion. Create a Certificate Chain in PEM Format Using OpenSSL Step 6. openssl_verify( string$data, string$signature, mixed$pub_key_id[, mixed$signature_alg= OPENSSL_ALGO_SHA1] ) : int. For your SSL certificate: openssl x509 –noou t –modulus – in .crt The verification mode can be additionally controlled through 15 flags . A maximal depth chain can have up to num+2 certificates, since neither the end-entity certificate nor the trust-anchor certificate count against the -verify_depth limit. Search, None of the above, continue with my search, OpenSSL commands to check and verify your SSL certificate, key and CSR. $ openssl s_client -connect sub.example.com:443 CONNECTED(00000003) depth=0 CN = sub.example.com verify error:num=20:unable to get local issuer certificate verify return:1 depth=0 CN = sub.example.com verify error:num=27 openssl verify -CAfile certificate-chain.pem certificate.pem If the response is OK, the check is valid. Check a certificate and return information about it (signing authority, expiration date, etc. No results were found for your search query. You can verify this using the following command: $ openssl version -d Test FTP certificate openssl s We set the serial number using CAcreateserial, and output the signed key in the file named server.crt Search support or find a product: Search. I'm using the following version: $ openssl version OpenSSL 1.0.1g 7 Apr 2014 Get a certificate You can omit the CRL, but then the CRL check will not work, it will just validate the certificate against the chain. openssl s_client -connect outlook.office365.com:443 Loading 'screen' into random state - done CONNECTED(00000274) depth=1 /C=US/O=DigiCert Inc/CN=DigiCert Cloud Services CA-1 verify error:num=20:unable to get local issuer 署名が正しいと判定されるためには、 その公開鍵が署名の際に使用した秘密鍵に対応していることを必要とします。. If you are trying to verify that an SSL certificate is installed correctly, be sure to check out the SSL Checker. 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