(Ruby) RSA Sign using Base64 Private Key

Signs a string using a non-encrypted RSA private key in base64 encoding. Returns the RSA signature as a base64 string.

Note: This example requires Chilkat v11.0.0 or greater.

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

require 'chilkat'

success = false

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

privKey = Chilkat::CkPrivateKey.new()

sbPem = Chilkat::CkStringBuilder.new()
sbPem.AppendLine("-----BEGIN RSA PRIVATE KEY-----",true)
sbPem.AppendLine("MIIC .... j5A==",true)
sbPem.AppendLine("-----END RSA PRIVATE KEY-----",true)

success = privKey.LoadPem(sbPem.getAsString())
if (success == false)
    print privKey.lastErrorText() + "\n";
    exit
end

rsa = Chilkat::CkRsa.new()

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

bd = Chilkat::CkBinData.new()
bd.AppendString("12345678","utf-8")

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

# Get the base64 RSA signature.
print bd.getEncoded("base64") + "\n";

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

strOriginal = bd.getString("utf-8")
print strOriginal + "\n";