Como emitir e gerar o certificate request

Gerar o certificado

Criar Diretório: mkdir ~/domain.com.ssl

Gerar RSA: openssl genrsa -out ~/domain.com.ssl/domain.com.key 2048

Gerar CSR: openssl req -new -sha256 -key ~/domain.com.ssl/domain.com.key -out ~/domain.com.ssl/domain.com.csr

Exemplo

Criar Diretório: mkdir ~/jcr2.ifsp.edu.br.ssl

Gerar RSA: openssl genrsa -out ~/jcr2.ifsp.edu.br.ssl/jcr2.ifsp.edu.br.key 2048

Gerar CSR:
openssl req -new -sha256 -key ~/jcr2.ifsp.edu.br.ssl/jcr2.ifsp.edu.br.key -out ~/jcr2.ifsp.edu.br.ssl/jcr2.ifsp.edu.br.csr

As seguintes perguntas serão feitas (respostas abaixo):

You are about to be asked to enter information that will be incorporated into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [AU]:BR
State or Province Name (full name) [Some-State]:SP
Locality Name (eg, city) []:Sao Paulo
Organization Name (eg, company) [Internet Widgits Pty Ltd]:INSTITUTO FEDERAL DE EDUCACAO, CIENCIA E TECNOLOGIA DE SAO PAULO
Organizational Unit Name (eg, section) []:
Common Name (e.g. server FQDN or YOUR name) []:jcr2.ifsp.edu.br
Email Address []:

Please enter the following 'extra' attributes to be sent with your certificate request
A challenge password []:
An optional company name []:

Após gerar e enviar o CSR para a Reitoria, você deverá baixar o novo certificado intermediate e root no site do ICPEdu: LINK

Para facilitar, segue os links de download tirados do site:
"gs_root.pem" LINK_DE_DOWNLOAD
"intermediate-2020.pem" LINK_DE_DOWNLOAD

Certificados emitidos a partir de 27/11/2020 devem obrigatoriamente utilizar o novo "intermediate.pem" citado acima.

Para fins de registro, segue abaixo o conteúdo dos arquivos:

gs_root.pem

-----BEGIN CERTIFICATE-----
MIIDXzCCAkegAwIBAgILBAAAAAABIVhTCKIwDQYJKoZIhvcNAQELBQAwTDEgMB4G
A1UECxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNp
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A1UEChMKR2xvYmFsU2lnbjETMBEGA1UEAxMKR2xvYmFsU2lnbjCCASIwDQYJKoZI
hvcNAQEBBQADggEPADCCAQoCggEBAMwldpB5BngiFvXAg7aEyiie/QV2EcWtiHL8
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XriX7613t2Saer9fwRPvm2L7DWzgVGkWqQPabumDk3F2xmmFghcCAwEAAaNCMEAw
DgYDVR0PAQH/BAQDAgEGMA8GA1UdEwEB/wQFMAMBAf8wHQYDVR0OBBYEFI/wS3+o
LkUkrk1Q+mOai97i3Ru8MA0GCSqGSIb3DQEBCwUAA4IBAQBLQNvAUKr+yAzv95ZU
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Mx86OyXShkDOOyyGeMlhLxS67ttVb9+E7gUJTb0o2HLO02JQZR7rkpeDMdmztcpH
WD9f
-----END CERTIFICATE-----

intermediate-a_partir_de_27-11-2020

-----BEGIN CERTIFICATE-----
MIIE+DCCA+CgAwIBAgIQd70NrbPiwI2vSwhjGuic4DANBgkqhkiG9w0BAQsFADBQ
MQswCQYDVQQGEwJCRTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEmMCQGA1UE
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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIEqTCCA5GgAwIBAgIQd70NdT8uGWAb1U4KAkRGdjANBgkqhkiG9w0BAQsFADBM
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-----END CERTIFICATE-----