(Ruby) Renew a DigiCert Certificate from an EST-enabled profile

Demonstrates how to renew a certificate from an EST-enabled profile in DigiCert​​®​​ Trust Lifecycle Manager. (The certificate must be within the renewal window configured in the certificate profile. The CSR must have same Subject DN values as the original certificate.)

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

require 'chilkat'

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

# The example below duplicates the following OpenSSL commands:
# 
# # Name of certificate as argument 1
# 
# # Make new key
# openssl ecparam -name prime256v1 -genkey -noout -out ${1}.key.pem
# 
# # Make csr
# openssl req -new -sha256 -key ${1}.key.pem -out ${1}.p10.csr -subj "/CN=${1}"
# 
# # Request new cert
# curl -v --cacert data/ca.pem --cert data/${1}.pem --key data/${1}.key.pem 
#     --data-binary @${1}.p10.csr -o ${1}.p7.b64 -H "Content-Type: application/pkcs10" https://clientauth.demo.one.digicert.com/.well-known/est/IOT/simplereenroll
# 
# # Convert to PEM
# openssl base64 -d -in ${1}.p7.b64 | openssl pkcs7 -inform DER -outform PEM -print_certs -out ${1}.pem

# ------------------------------------------------------------------------------------------------------------------

# Create a Fortuna PRNG and seed it with system entropy.
# This will be our source of random data for generating the ECC private key.
fortuna = Chilkat::CkPrng.new()
entropy = fortuna.getEntropy(32,"base64")
success = fortuna.AddEntropy(entropy,"base64")

ec = Chilkat::CkEcc.new()

# Generate a random EC private key on the prime256v1 curve.
# privKey is a CkPrivateKey
privKey = ec.GenEccKey("prime256v1",fortuna)
if (ec.get_LastMethodSuccess() != true)
    print ec.lastErrorText() + "\n";
    exit
end

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

# Specify your CN
csr.put_CommonName("mysubdomain.mydomain.com")

# Create the CSR using the private key.
bdCsr = Chilkat::CkBinData.new()
success = csr.GenCsrBd(privKey,bdCsr)
if (success == false)
    print csr.lastErrorText() + "\n";

    exit
end

# Save the private key and CSR to files.
privKey.SavePkcs8EncryptedPemFile("password","c:/temp/qa_output/ec_privkey.pem")

bdCsr.WriteFile("c:/temp/qa_output/csr.pem")

# ----------------------------------------------------------------------
# Now do the CURL request to POST the CSR and get the new certificate.

http = Chilkat::CkHttp.new()

tlsClientCert = Chilkat::CkCert.new()
success = tlsClientCert.LoadFromFile("data/myTlsClientCert.pem")
if (success == false)
    print tlsClientCert.lastErrorText() + "\n";
    exit
end

bdTlsClientCertPrivKey = Chilkat::CkBinData.new()
success = bdTlsClientCertPrivKey.LoadFile("data/myTlsClientCert.key.pem")
if (success == false)
    print "Failed to load data/myTlsClientCert.key.pem" + "\n";
    exit
end

tlsClientCertPrivKey = Chilkat::CkPrivateKey.new()
success = tlsClientCertPrivKey.LoadAnyFormat(bdTlsClientCertPrivKey,"")
if (success == false)
    print tlsClientCertPrivKey.lastErrorText() + "\n";
    exit
end

success = tlsClientCert.SetPrivateKey(tlsClientCertPrivKey)
if (success == false)
    print tlsClientCert.lastErrorText() + "\n";
    exit
end

http.SetSslClientCert(tlsClientCert)

http.put_RequireSslCertVerify(true)

# The body of the HTTP request contains the binary CSR.
# resp is a CkHttpResponse
resp = http.PBinaryBd("POST","https://clientauth.demo.one.digicert.com/.well-known/est/IOT/simplereenroll",bdCsr,"application/pkcs10",false,false)
if (http.get_LastMethodSuccess() == false)
    print http.lastErrorText() + "\n";
    exit
end

if (resp.get_StatusCode() != 200)
    print "response status code = " + resp.get_StatusCode().to_s() + "\n";
    print resp.bodyStr() + "\n";
    print "Failed" + "\n";

    exit
end

# The response is the Base64 DER of the new certificate.
myNewCert = Chilkat::CkCert.new()
success = myNewCert.LoadFromBase64(resp.bodyStr())
if (success == false)
    print myNewCert.lastErrorText() + "\n";
    print "Cert data = " + resp.bodyStr() + "\n";
    print "Failed." + "\n";

    exit
end

success = myNewCert.SaveToFile("c:/temp/qa_output/myNewCert.cer")
if (success == false)
    print myNewCert.lastErrorText() + "\n";
    print "Failed." + "\n";
    exit
end

print "Success." + "\n";