(Ruby) Convert DSA PEM Private Key to DER

Converts a DSA private key from PEM format to DER. The first part of the example will convert an unencrypted PEM to DER, then 2nd part will convert an encrypted PEM to unencrypted DER.

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

require 'chilkat'

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

dsa = Chilkat::CkDsa.new()

# Load a PEM private key.

pemPrivateKey = dsa.loadText("dsa_priv.pem")
# Import the unencrypted PEM into the DSA object.
success = dsa.FromPem(pemPrivateKey)
if (success != true)
    print dsa.lastErrorText() + "\n";
    exit
end

# Write it out as a DER file:
success = dsa.ToDerFile("dsa_priv.der")
if (success != true)
    print dsa.lastErrorText() + "\n";
    exit
end

# Load an encrypted PEM private key.
pemPrivateKey = dsa.loadText("dsa_privEncrypted.pem")
# Import the encrypted PEM into the DSA object.
success = dsa.FromEncryptedPem("myPassword",pemPrivateKey)
if (success != true)
    print dsa.lastErrorText() + "\n";
    exit
end

# Write it out as an unencrypted DER file:
success = dsa.ToDerFile("dsa_priv2.der")
if (success != true)
    print dsa.lastErrorText() + "\n";
    exit
end

print "Finished!" + "\n";