Ruby

DSA Generate Key

See more DSA Examples

Generates a DSA public/private key pair and saves to PEM and DER file formats (both encrypted and non-encrypted).

An encrypted DSA PEM looks like this:

-----BEGIN DSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9DAFD5C4CD62A5D0

QwDdp66sB0qKXQli7FbVcKL/eo3wu7kGRlV2sI8XbkNa1RTLiwnwTWDB0dqyWRQ8
...
Bx0HVfxKiNgCbL6BQEnYD+GOmMcckuj9Uhgloe/YuXCIDJBGhjUt/li3hvR/PXeC

V2xxNl1XKBE88njqi+UXt4vjGVNLpvXM
-----END DSA PRIVATE KEY-----

Ruby

require 'chilkat'

success = false

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

dsa = Chilkat::CkDsa.new()

# Call GenKey to generate a new DSA key.
# The number of bits should be at least 1024 and a multiple
# of 64.   Typical values are either 1024 or 2048.
# DSA key generation is compute intensive and may take
# a short while to complete.
success = dsa.GenKey(2048)
if (success != true)
    print dsa.lastErrorText() + "\n";
    exit
end

# Extract the private and public parts to PEM or DER format
# and save to files...

# First for the public key...
# The public key never needs to be encrypted.

# Save the public key in PEM format:
pemStr = dsa.toPublicPem()
# This example will not check the return value of SaveText...
success = dsa.SaveText(pemStr,"dsa_pub.pem")

# Save the public key in DER format:
success = dsa.ToPublicDerFile("dsa_pub.der")

bPublicOnly = true
# Save to XML
xmlStr = dsa.toXml(bPublicOnly)
success = dsa.SaveText(xmlStr,"dsa_pub.xml")

# ------------------------------------
# Now for the private key....
# ------------------------------------

# Unencrypted PEM:
pemStr = dsa.toPem()
success = dsa.SaveText(pemStr,"dsa_priv.pem")

# Encrypted PEM:
pemStr = dsa.toEncryptedPem("myPassword")
success = dsa.SaveText(pemStr,"dsa_privEncrypted.pem")

# DER:
success = dsa.ToDerFile("dsa_priv.der")

# XML:
bPublicOnly = false
xmlStr = dsa.toXml(bPublicOnly)
success = dsa.SaveText(xmlStr,"dsa_priv.xml")

print "Finished!" + "\n";