Creating Default OpenSSL Config File
Creating Custom Root CA
Creating the CA key:
openssl genrsa -des3 -out root-CA.key 4096
Note: remove -des
option to create key without password
Creating self sign CA certificate
openssl req -x509 -new -nodes -key root-CA.key -sha256 -days 3650 -out root-CA.crt `
-subj "/C=ID/O=Dev lab/CN=Dev lab Root CA" `
-addext 'keyUsage = cRLSign, keyCertSign, digitalSignature' `
-addext 'extendedKeyUsage = critical, serverAuth, clientAuth, codeSigning, emailProtection, timeStamping' `
-addext 'subjectKeyIdentifier=hash' `
-addext 'authorityKeyIdentifier=keyid:always,issuer:always' `
-addext "basicConstraints = critical, CA:TRUE"
Explanations:
subj
create unattended answer subjectbasicConstraints
CA:TRUE means it's issuerkeyUsage
determine what's this cert for: certificate signing (keyCertSign), CRL signing (cRLSign), digital signatureextendedKeyUsage
an extended version ofkeyUsage
: server authentication (serverAuth), client authentication (clientAuth), file/code signing (codeSigning), S/MIME signing (emailProtection), time stampingsubjectKeyIdentifier
identifier of this certauthoritykKeyIdentifier
the identifier which signs the cert, if it's root cert, then it should be itself
Shorter version
openssl req -config openssl.cnf -x509 -new -nodes -key root-CA.key -out root-CA.crt -days 3650 -extensions ca_cert -subj "/C=ID/O=Dev Lab/CN=Dev Lab Root CA"
Reference: OpenSSL man page
Inspect root CA certificate
openssl x509 -noout -text -in root-CA.crt
Convert into PKCS12 (.pfx) format
openssl pkcs12 -export -name "Root CA" -out root-CA.pfx -inkey root-CA.key -in root-CA.crt
Then import the pfx file into local machine placed under Trusted Root Certification Authorities
Creating Intermediate CA
Creating the intermedia CA key
openssl genrsa -out server-CA.key 4096
Creating intermediate certificate request
openssl req -new -key server-CA.key -out server-CA.csr -subj "/C=ID/O=Dev Lab/OU=Development/CN=Dev Lab Server CA"
Sign the intermedia CA certificate's request with CA's key and cert:
openssl x509 -extfile openssl.cnf -req -in server-CA.csr -CA root-CA.crt -CAkey root-CA.key -CAcreateserial -out server-CA.crt -extensions ica_cert -days 3650
Inspect root CA certificate
openssl x509 -noout -text -in server-CA.crt
Convert into PKCS12 format
openssl pkcs12 -export -name "Dev lab Server CA" -inkey server-CA.key -in server-CA.crt -out server-CA.pfx
Then import the pfx file into local machine placed under Intermediate Certification Authorities
Creating User Certificate
Creating the certificate key
openssl genrsa -out dev.lab.key 2048
Before moving on, the openssl config is configured to accept subject alternate name from environment variable named SAN
(see line 176), so you need to configure first, otherwise, it will fail: $Env:SAN = 'DNS:*.dev.lab, DNS:dev.lab'
. You can set it to the same as CN if you don't want to assign it to wilcard domain. We can also assign it to IP address as follows: $Env:SAN = 'DNS:*.dev.lab,DNS:dev.lab,DNS:localhost,IP:127.0.0.1'
. After that, we can continue to create certificate request
openssl req -new -key dev.lab.key -out dev.lab.csr -subj "/C=ID/ST=Jakarta/O=Dev Home/OU=Development/CN=*.dev.lab"
Sign the certificate request using server CA's key and certificate
openssl x509 -extfile openssl.cnf -extensions web_cert -req -CA server-CA.crt `
-CAkey server-CA.key -CAcreateserial -days 365 `
-in dev.lab.csr -out dev.lab.crt
Convert into PKCS12 format
openssl pkcs12 -export -name "dev.lab Certificate" -inkey dev.lab.key -in dev.lab.crt -out dev.lab.pfx
Import the .pfx file into local machine using default location.
Creating S/MIME Certificate
Creating the certificate key
openssl genrsa -out iroel-email.key 2048
Creating certificate request
openssl req -new -key iroel-email.key -out iroel-email.csr -subj "/C=ID/ST=Jakarta/CN=Fakhrulhilal Maktum/emailAddress=iroel@dev.lab" -addext "subjectAltName = email:iroel@dev.lab, email:iroel@other.lab"
Sign the certificate request using server CA's key and certificate
$Env:SAN = 'email:iroel@dev.lab, email:iroel@dev.test'
openssl x509 -extfile openssl.cnf -extensions smime_cert -req -CA server-CA.crt `
-CAkey server-CA.key -CAcreateserial -setalias "Dev email certificate" `
-in iroel-email.csr -out iroel-email.crt -trustout -days 365
Convert into PKCS12 format
openssl pkcs12 -export -name "wilcard.dev.lab Certificate" -inkey dev.lab.key -in dev.lab.crt -out dev.lab.pfx
Import the .pfx file into local machine using default location.
Installing Certificates
Installing CAs' Certificate
- Install root certificate (root-CA.crt) to Trusted Root Certification Authorities in machine level
- Install intermediate certificate (server-CA.crt) to Intermediate Certification Authorities
Install IIS Express Certificate
Install the certificate in Local Machine wide and in default location (Personal). Run this powershell with administrator privilege. Friendly name is -name
parameter value when converting into PKCS12 format.
$PfxPassword = 'pfx_password'
#$Certificate = Get-ChildItem Cert:\LocalMachine\My | ?{ $_.FriendlyName -eq 'localhost' }
$Certificate = Get-PfxCertificate -FilePath .\dev.lab.pfx -Password (ConvertTo-SecureString -String $PfxPassword -AsPlainText)
$IisExpress = Get-CimInstance Win32_Product -Filter 'Name like "IIS%Express%"'
for ($Port = 44300; $Port -lt 44400; $Port++) {
netsh http delete sslcert ipport=0.0.0.0:$Port
netsh http add sslcert ipport=0.0.0.0:$Port certhash="$($Certificate.Thumbprint)" appid="$($IisExpress.IdentifyingNumber)"
}
Installing Kestrel Certificate
Using environment variable
ASPNETCORE_Kestrel__Certificates__Default__Path
= path to pfx file
ASPNETCORE_Kestrel__Certificates__Default__Password
= pfx's passwordUsing appsettings.json
{
"Kestrel": {
"Certificates": {
"Default": {
"Path": "path/to/pfx/file",
"Password": "pfx's password",
/* or using .crt and key file */
/*
"Path": "path/to/crt/file",
"KeyPath": "path/to/key/file"
*/
}
}
}
}
Reference: Configure endpoints for the ASP.NET Core Kestrel web server
- Using dotnet tool:
dotnet dev-certs https --clean -i .\dev.lab.pfx -p the_password
Installing remote desktop certificate
$PfxPassword = 'pfx_password'
#$Certificate = Get-ChildItem Cert:\LocalMachine\My | ?{ $_.FriendlyName -eq 'localhost' }
$Certificate = Get-PfxCertificate -FilePath .\dev.lab.pfx -Password (ConvertTo-SecureString -String $PfxPassword -AsPlainText)
wmic /namespace:\\root\cimv2\TerminalServices PATH Win32_TSGeneralSetting Set SSLCertificateSHA1Hash="$($Certificate.Thumbprint)"
`
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