"keytool" Generating Maria's Private Key
This section provides a tutorial example on how to use 'keytool' to generate a pair of private key and public key.
In this section, let's assume that Maria is using the "keytool". She wants to have her own private key
to sign documents. But she needs her public key certificate to be signed by me, Herong, because
other people trust me instead of Maria.
So Maria starts to generate her own private key and store it in a "keystore" file.
This can be done by a single "keytool -genkeypair" command as shown in the following command
java version "1.6.0_01"
Java(TM) SE Runtime Environment (build 1.6.0_01-b06)
Java HotSpot(TM) Client VM (build 1.6.0_01-b06, mixed mode,
>keytool -genkeypair -alias maria_key -keysize 1024
-keystore maria.jks -storepass jkspass -keypass keypass
What is your first and last name?
[Unknown]: Maria Teresa
What is the name of your organizational unit?
[Unknown]: Maria Unit
What is the name of your organization?
[Unknown]: Maria Company
What is the name of your City or Locality?
[Unknown]: Maria City
What is the name of your State or Province?
[Unknown]: Maria State
What is the two-letter country code for this unit?
Is CN=Maria Teresa, OU=Maria Unit, O=Maria Company, L=Maria City,
ST=Maria State, C=AT correct?
Here is what Maria did:
- "java -version" command is used to check the Java version.
- "keytool -genkeypair" command is used to generated a key pair: Maria's private key and Maria's public key.
- "-keystore maria.jks" option specifies the keystore file name to hold the key pair.
- "-alias maria_key" option specifies the entry name of the key pair in the keystore file, because keystore file
can hold multiple key and certificate entries.
- "-keysize 1024" option specifies the key size to be 1024 bits. To bad, "keytool" can not generated 2048-bit keys.
- "-storepass jkspass" option specifies a password to protect the keystore file.
- "-keypass keypass" option specifies a password to protect "maria_key" entry in the keystore file.
- "keytool" also requires Maria's identification information (distinguished name) to be entered at the time
of generating the key pair, which is not really needed for generating a key pair. Distinguished name only needed
when generating certificates.
Want to confirm that Maria's key pair is in the keystore file? Try this command:
>keytool -list -keystore maria.jks -storepass jkspass
Keystore type: JKS
Keystore provider: SUN
Your keystore contains 1 entry
maria_key, Apr 1, 2007, PrivateKeyEntry,
Certificate fingerprint (MD5): 54:5A:E8:77:30:82:B4:EB:C...
Now Maria is ready to generate a CSR (Certificate Sign Request) to ask me as a CA to sign it
as described in the next section.
Last update: 2013.
Table of Contents
About This Book
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
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"
"OpenSSL" Acting as a CA (Certificate Authority)
"OpenSSL" Generating CA's Private Key
"OpenSSL" Self-Signing CA's Public Key
►"keytool" Generating Maria's Private Key
"keytool" Generating Maria's CSR
"OpenSSL" Signing Maria's CSR
"OpenSSL" Managing Serial Numbers when Signing CSR
"keytool" Importing CA's Own Certificate
""keytool" Importing Maria's Certificate Signed by CA
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 (Internet Explorer)
Using Certificates in Firefox
Using Certificates in Google Chrome
PDF Printing Version