Cryptography Tutorials - Herong's Tutorial Examples - v5.42, by Herong Yang
Creating a Certificate Path with OpenSSL
This section provides a tutorial example on how to create multiple certificates to form a certificate path for testing purpose.
Here is a testing scenario I followed to generate some certificates with different issuers and subjects. See previous notes if you have trouble generating keys and signing certificates.
1. Generating a self-signed certificate for Herong, herong.crt:
herong> echo Generating keys for Herong herong> openssl genrsa -des3 -out herong_rsa.key ... herong> echo Generating a self-signed certificate for Herong herong> openssl req -new -key herong_rsa.key -x509 -out herong.crt -config openssl.cnf ...
2. Generating a certificate for John and signed by Herong, john.crt:
herong> echo Generating keys for John herong> openssl genrsa -des3 -out john_rsa.key ... herong> echo Generating a certificate signing request for John herong> openssl req -new -key john_rsa.key -out john.csr \ -config openssl.cnf ... herong> echo Signing a John's request by Herong's key herong> openssl x509 -req -in john.csr -CA herong.crt \ -CAkey herong_rsa.key -out john.crt -set_serial 3 ...
3. Generating a certificate for Bill and signed by John, bill.crt:
herong> echo Generating keys for Bill herong> openssl genrsa -des3 -out bill_rsa.key ... herong> echo Generating a certificate signing request for Bill herong> openssl req -new -key bill_rsa.key -out bill.csr \ -config openssl.cnf ... herong> echo Signing a Bill's request by John's key herong> openssl x509 -req -in bill.csr -CA john.crt \ -CAkey john_rsa.key -out bill.crt -set_serial 7 ...
4. Generating a certificate for Tom and signed by Bill, tom.crt:
herong> echo Generating keys for Tom herong> openssl genrsa -des3 -out tom_rsa.key ... herong> echo Generating a certificate signing request for Bill herong> openssl req -new -key tom_rsa.key -out tom.csr \ -config openssl.cnf ... herong> echo Signing a Tom's request by Bill's key herong> openssl x509 -req -in tom.csr -CA bill.crt \ -CAkey bill_rsa.key -out tom.crt -set_serial 11 ...
Ok. 4 certificates are enough to do some interesting tests with the "openssl verify" command. See the next section for testing result.
Table of Contents
Introduction to AES (Advanced Encryption Standard)
DES Algorithm - Illustrated with Java Programs
DES Algorithm Java Implementation
DES Algorithm - Java Implementation in JDK JCE
DES Encryption Operation Modes
PHP Implementation of DES - mcrypt
Blowfish - 8-Byte Block Cipher
Secret Key Generation and Management
Cipher - Secret Key Encryption and Decryption
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
OpenSSL Introduction and Installation
OpenSSL Generating and Managing RSA Keys
OpenSSL Generating and Signing CSR
►OpenSSL Validating Certificate Path
Certification Path Validation Rules
►Creating a Certificate Path with OpenSSL
Validating a Certificate Path with OpenSSL
"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"