(Ruby) RSA Decrypt using PEM

This example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file.

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

rsa = Chilkat::CkRsa.new()

key = Chilkat::CkPrivateKey.new()

# Load an RSA private key from an unencrypted PEM file:
# (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.)

success = key.LoadPemFile("qa_data/rsa/decryptTest/priv.pem")
if (success == false)
    print key.lastErrorText() + "\n";
    exit
end

# Make the key available to the RSA object
success = rsa.UsePrivateKey(key)
if (success == false)
    print rsa.lastErrorText() + "\n";
    exit
end

encryptedStr = "pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA=="

rsa.put_EncodingMode("base64")

usePrivateKey = true
decryptedStr = rsa.decryptStringENC(encryptedStr,usePrivateKey)

print "Decrypted:" + "\n";
print decryptedStr + "\n";