Cryptography Tutorials - Herong's Tutorial Examples

∟Java Default Implementation of DSA

∟Example of DSA Key Parameters and Properties

This section provides 2 DsaKeyChecker.java output examples to show DSA key parameters and properties.

Let's compile and run DsaKeyChecker.java on my first DSA key pair, dsa_512.pub and dsa_512.pri, generated in the previous tutorial: 

herong> javac DsaKeyChecker.java

herong> java DsaKeyChecker dsa_512

DSA Key Parameters:
p = 13232376895198612407547930718267435757728527029623408872245156039
757713029036368719146452186041204237350521785240337048752071462798273
003935646236777459223
q = 857393771208094202104259627990318636601332086981
g = 54216440574364751416096484883257051280474283943804743768346673007
661082626139005426812890807137245973106730741193551360857959820973906
70890367185141189796
x = 792647853324835944125296675259316105451780620466
y = 10783827985936883407800478884376885258012329124816552994400318669
417122279843086645137200743427232531167766104260606805303022314906254
403593803159583034340

DSA Key Verification:
What's key size? 512
Is p a prime? true
Is q a prime? true
Is p-1 mod q == 0? 0
Is g**q mod p == 1? 1
Is q > x? true
Is g**x mod p == y? true

The output looks good. The key size is 512 bits, measured by the number of bits of the prime modulus "p".

Below the output on my second DSA key pair, dsa_1024.pub and dsa_1024.pri: 

herong> java DsaKeyChecker dsa_1024

DSA Key Parameters:
p = 17801190547854226652823756245015999014523215636912067427327445031
444286578873702077061269525212346307956715678477846644997065077092072
785705000966838814403412974522117181850604723115003930107995935806739
534871706631980226201971496652413506094591370759495651467285569060679
4135837542707371727429551343320695239
q = 864205495604807476120572616017955259175325408501
g = 17406820753240209518581198012352343653860449079456135097849583104
059995348845582314785159740894095072530779709491575949236830057425243
876103708447346718014887611810308304375498519098347260155049469132948
808339549231385000036164648264460849230407872181895999905649609776936
8017749273708962006689187956744210730
x = 774290984479563168206130828532207106685994961942
y = 11413953692062257086993806233172330674938775529337393031977771373
129746946910914240113023221721777732136818444139744393157698465044933
013442758757568273862367115354816009554808091206304096963365266649829
966917085474283297375073085459703201287235180005340124397005934806133
1526243448471205166130497310892424132

DSA Key Verification:
What's key size? 1024
Is p a prime? true
Is q a prime? true
Is p-1 mod q == 0? 0
Is g**q mod p == 1? 1
Is q > x? true
Is g**x mod p == y? true

Table of Contents

 About This Book

 Cryptography Terminology

 Cryptography Basic Concepts

 Introduction to AES (Advanced Encryption Standard)

 Introduction to DES Algorithm

 DES Algorithm - Illustrated with Java Programs

 DES Algorithm Java Implementation

 DES Algorithm - Java Implementation in JDK JCE

 DES Encryption Operation Modes

 DES in Stream Cipher Modes

 PHP Implementation of DES - mcrypt

 Blowfish - 8-Byte Block Cipher

 Secret Key Generation and Management

 Cipher - Secret Key Encryption and Decryption

 Introduction of RSA Algorithm

 RSA Implementation using java.math.BigInteger Class

 Introduction of DSA (Digital Signature Algorithm)

►Java Default Implementation of DSA

 DsaKeyGenerator.java - Generating DSA Key Pair

 DSA 512-bit and 1024-bit Key Pair Examples

 DsaKeyChecker.java - Reading and Checking DSA Keys

►Example of DSA Key Parameters and Properties

 java.security.Signature - The Data Signing Class

 DsaSignatureGenerator.java - Generating DSA Digital Signature

 DsaSignatureGenerator.java Test Results

 DsaSignatureVerifier.java - Verifying DSA Digital Signature

 DsaSignatureVerifier.java Test Results

 Private key and Public Key Pair Generation

 PKCS#8/X.509 Private/Public Encoding Standards

 Cipher - Public Key Encryption and Decryption

 MD5 Mesasge Digest Algorithm

 SHA1 Mesasge Digest Algorithm

 OpenSSL Introduction and Installation

 OpenSSL Generating and Managing RSA Keys

 OpenSSL Managing Certificates

 OpenSSL Generating and Signing CSR

 OpenSSL Validating Certificate Path

 "keytool" and "keystore" from JDK

 "OpenSSL" Signing CSR Generated by "keytool"

 Migrating Keys from "keystore" to "OpenSSL" Key Files

 Certificate X.509 Standard and DER/PEM Formats

 Migrating Keys from "OpenSSL" Key Files to "keystore"

 Using Certificates in IE

 Using Certificates in Google Chrome

 Using Certificates in Firefox

 Archived Tutorials

 References

 Full Version in PDF/EPUB