(Ruby) Add Private Key to Java Keystore

Adds a private key to an existing Java keystore.

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.

jks = Chilkat::CkJavaKeyStore.new()

jksPassword = "myJksPassword"
jksPath = "/someDir/keyStore.jks"

# Load the Java keystore from a file.
success = jks.LoadFile(jksPassword,jksPath)
if (success != true)
    print jks.lastErrorText() + "\n";
    exit
end

# A JKS private key entry consists of both the private key,
# it's associated certificate (which contains the matching public key
# within the X.509 of the certificate), and the certificates in the
# chain of authentication to the root.
# 
# Therefore, to add a private key entry to a JKS requires
# a Chilkat certificate object that has a private key and which also
# has the certificate chain (up to the root) available.

# There are many ways to get a Chilkat certificate object
# that contains (within it) the private key and the certificate chain
# This example will show two possibilities:
# (1) Where the cert and issuing root are provided in PEM format in .crt files,
# and the private key is also provided in unencrypted PEM format (.key file).
# (2) Where the cert, private key, and issuing root are provided in a single PFX.

# First for the .crt / .key files:
cert = Chilkat::CkCert.new()

# Chilkat will automatically determine the format of the cert file and load it correctly.
success = cert.LoadFromFile("/mycerts/alice.crt")
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

# Certificates required for building the chain of authentication can be
# added to an XML certificate vault object, and then provided as
# a source for obtaining certs when building the chain.
certVault = Chilkat::CkXmlCertVault.new()
success = certVault.AddCertFile("/mycerts/ca.crt")
if (success != true)
    print certVault.lastErrorText() + "\n";
    exit
end

success = cert.UseCertVault(certVault)
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

# Now provide the associated private key to the certificate object.
# The Chilkat private key class provides methods for loading from many formats (both
# encrypted and unencrypted).
privKey = Chilkat::CkPrivateKey.new()
success = privKey.LoadPemFile("/mycerts/alice.key")
if (success != true)
    print privKey.lastErrorText() + "\n";
    exit
end

# Provide the certificate object with the private key:
success = cert.SetPrivateKey(privKey)
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

# Our certificate object now contains all that we need to add it as a private key entry
# to the Java keystore:
alias = "alice"
success = jks.AddPrivateKey(cert,alias,jksPassword)
if (success != true)
    print jks.lastErrorText() + "\n";
    exit
end

# Write the updated JKS, which contains the new private key entry w/ certificate chain.
success = jks.ToFile(jksPassword,jksPath)
if (success != true)
    print jks.lastErrorText() + "\n";
    exit
end

print "Added new private key entry (from .crt and .key files) to the JKS!" + "\n";

# Now let's add a new private key entry from a PFX that contains a single
# private key with associated cert and cert chain.
pfx = Chilkat::CkPfx.new()

success = pfx.LoadPfxFile("/myPfxFiles/my.pfx","pfxPassword")
if (success != true)
    print pfx.lastErrorText() + "\n";
    exit
end

# This is easy -- simply add the PFX to the JKS
alias = "bob"
success = jks.AddPfx(pfx,alias,jksPassword)
if (success != true)
    print jks.lastErrorText() + "\n";
    exit
end

# Write the updated JKS, which contains the new private key entry w/ certificate chain
# that came from the PFX.
success = jks.ToFile(jksPassword,jksPath)
if (success != true)
    print jks.lastErrorText() + "\n";
    exit
end

print "Added new private key entry (from PFX) to the JKS!" + "\n";