(CkPython) Generate new DSA Key from OpenSSL Parameters File

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

Chilkat Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux, Solaris

import sys
import chilkat

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

dsa = chilkat.CkDsa()

success = dsa.GenKeyFromParamsDerFile("dsaparam.der")
if (success != True):
    print(dsa.lastErrorText())
    sys.exit()

# To generate a key from PEM, call GenKeyFromParamsPem 
# (for an in-memory PEM string) or GenKeyFromParamsFilePem
# for a PEM file.

# The public and private keys may now be exported to PEM, DER,
# and XML formatted 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(pemStr,"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(pemStr,"dsa_priv.xml")

print("Finished!")