"OpenSSL" Managing Serial Numbers when Signing CSR

This section provides a tutorial example on how to manage serial number when using 'OpenSSL' to sign a CSR (Certificate Signing Request) generated by 'keytool' with CA's private key.

If I use the "openssl x509 -req" command without providing serial number options, "OpenSSL" will give me an error like this:

>openssl x509 -req -in maria.csr -CA herong.crt 
-CAkey herong.key -out maria.crt -days 365

Loading 'screen' into random state - done
Signature ok
subject=/C=AT/ST=Maria State/L=Maria City/O=Maria Company
/OU=Maria Unit/CN=Maria Teresa
Getting CA Private Key
Enter pass phrase for herong.key: keypass
herong.srl: No such file or directory
2744:error:02001002:system library:fopen:No such file or directory:
2744:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:278:

"OpenSSL" will try to open a file named "herong.srl". The error message is not clear at all. It does not say that "herong.srl" is the serial number file. There are 3 ways to supply a serial number to the "openssl x509 -req" command:

Last update: 2013.

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

 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

 Outdated Tutorials


 PDF Printing Version