(Python) DSA Generate Key

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-----

 Chilkat Python Module Downloads for Windows, Linux, and MAC OS X

import sys
import chilkat



dsa = chilkat.CkDsa()

success = dsa.UnlockComponent("Anything for 30-day trial")
if (success != True):
    print dsa.lastErrorText()
    sys.exit()

#  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()
    sys.exit()

#  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!"