Ruby

RSA Signature with Certificate's Private Key from PFX

See more RSA Examples

Demonstrates how to use a certificate's private key from a PFX file to create an RSA signature. Ruby

require 'chilkat'

success = false

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

# Create an instance of a certificate store object, load a PFX file,
# locate the certificate we need, and use it for signing.
# (a PFX file may contain more than one certificate.)
certStore = Chilkat::CkCertStore.new()

# The 1st argument is the filename, the 2nd arg is the 
# PFX file's password:
success = certStore.LoadPfxFile("chilkat.pfx","test")
if (success == false)
    print certStore.lastErrorText() + "\n";
    exit
end

# Find the certificate by the subject common name:
jsonCN = Chilkat::CkJsonObject.new()
jsonCN.UpdateString("CN","cert common name")

cert = Chilkat::CkCert.new()
success = certStore.FindCert(jsonCN,cert)
if (success == false)
    print certStore.lastErrorText() + "\n";
    exit
end

privKey = Chilkat::CkPrivateKey.new()
success = cert.GetPrivateKey(privKey)
if (success == false)
    print cert.lastErrorText() + "\n";
    exit
end

rsa = Chilkat::CkRsa.new()

success = rsa.UsePrivateKey(privKey)
if (success == false)
    print rsa.lastErrorText() + "\n";
    exit
end

# Encode the signature as a hex string
rsa.put_EncodingMode("hex")

strData = "This is the string to be signed."

# Sign the string using the sha-1 hash algorithm.
# Other valid choices are "sha-256", "md2" and "md5".
hexSig = rsa.signStringENC(strData,"sha-1")

print hexSig + "\n";

print "Success!" + "\n";