(Ruby) Generate CSR with Uncommon Fields

See more CSR Examples

Demonstrates how to generate a new RSA key and a Certificate Signing Request (CSR) for this:

csr.common.name=Admin forInformation-MainShop
csr.serial.number=1-XYZ|2-2.0|3-999695
csr.organization.identifier=990099994100099
csr.organization.unit.name=9999910000
csr.organization.name=9999910000
csr.country.name=SA
csr.invoice.type=1100
csr.location.address=King Fahed Road
csr.industry.business.category=MainOffice

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# First generate an RSA private key.
rsa = Chilkat::CkRsa.new()

# Generate a random 2048-bit RSA key.
success = rsa.GenerateKey(2048)
if (success != true)
    print rsa.lastErrorText() + "\n";
    exit
end

# Get the private key
# privKey is a CkPrivateKey
privKey = rsa.ExportPrivateKeyObj()

# Create the CSR object and set properties.
csr = Chilkat::CkCsr.new()

csr.put_CommonName("Admin forInformation-MainShop")

# Country Name (2 letter code)
csr.put_Country("SA")

# Organization Name (eg, company)
csr.put_Company("9999910000")

# Organizational Unit Name (eg, secion/division)
csr.put_CompanyDivision("9999910000")

# See https://www.alvestrand.no/objectid/2.5.4.html for OIDs for the following fields:

# csr.serial.number=1-XYZ|2-2.0|3-999695
# 2.5.4.5 - id-at-serialNumber 
csr.SetSubjectField("2.5.4.5","1-XYZ|2-2.0|3-999695","UTF8String")

# csr.organization.identifier=990099994100099
# 2.5.4.45 - id-at-uniqueIdentifier   Don't know if this is correct.
csr.SetSubjectField("2.5.4.45","1100","UTF8String")

# csr.invoice.type=1100
# Don't know what this OID would be...
csr.SetSubjectField("2.5.4.99","1100","UTF8String")

# csr.location.address=King Fahed Road
# 2.5.4.9 - id-at-streetAddress 
csr.SetSubjectField("2.5.4.9","King Fahed Road","UTF8String")

# csr.industry.business.category=MainOffice
# 2.5.4.15 - id-at-businessCategory 
csr.SetSubjectField("2.5.4.15","MainOffice","UTF8String")

# Create the CSR using the private key.
pemStr = csr.genCsrPem(privKey)
if (csr.get_LastMethodSuccess() != true)
    print csr.lastErrorText() + "\n";

    exit
end

# Save the private key and CSR to a files.
privKey.SavePkcs8EncryptedPemFile("password","qa_output/privKey1.pem")

fac = Chilkat::CkFileAccess.new()
fac.WriteEntireTextFile("qa_output/csr1.pem",pemStr,"utf-8",false)

# Show the CSR.
print pemStr + "\n";

# Sample output:
# The CSR PEM can be checked here:
# https://www.networking4all.com/en/support/tools/csr+check/
# Copy-and-paste the PEM into the online CSR Decoding / CSR Verification form

# 	-----BEGIN CERTIFICATE REQUEST-----
# 	MIIC6jCCAdICAQAwgaQxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
# ...
# ...
# 	hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
# 	-----END CERTIFICATE REQUEST-----