(Ruby) RSA Sign with PKCS8 Encrypted Key

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Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature.

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

require 'chilkat'

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

pkey = Chilkat::CkPrivateKey.new()

# Load the private key from an RSA PEM file:
success = pkey.LoadPkcs8EncryptedFile("privateKey.key","myPassword")

# Get the private key in XML format:
pkeyXml = pkey.getXml()

rsa = Chilkat::CkRsa.new()

# Import the private key into the RSA object:
success = rsa.ImportPrivateKey(pkeyXml)
if (success != true)
    print rsa.lastErrorText() + "\n";
    exit
end

# Return the signature in hex
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 "md2", "sha256", "sha384", "sha512",  and "md5".
hexSig = rsa.signStringENC(strData,"sha-1")

print hexSig + "\n";