(Ruby) RSASSA-PSS Algorithm with SHA256 Hashing

RSA encrypt a SHA256 hash with OAEP padding.

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

privkey = Chilkat::CkPrivateKey.new()

# Load the private key object from a PEM file.
# (To load from a PEM string, call LoadPem instead.)
success = privkey.LoadPemFile("somePath/myPrivateKey.pem")
if (success == false)
    print privkey.lastErrorText() + "\n";
    exit
end

rsa = Chilkat::CkRsa.new()
# Use RSA-PSS by setting OaepPadding = true
rsa.put_OaepPadding(true)
# Use SHA256
rsa.put_OaepHash("SHA-256")

rsa.UsePrivateKey(privkey)

# Generate a base64 signature.
rsa.put_EncodingMode("base64")

sigStr = rsa.signStringENC("String to be signed","SHA-256")
if (rsa.get_LastMethodSuccess() == false)
    print rsa.lastErrorText() + "\n";
    exit
end

print "Signature: " + sigStr + "\n";