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at risk. If you are serious about becoming your own CA on a large scale, I recommend setting up an isolated system that is not connected to your network and is physically secured. Also, I recommend Tempest-shielding technology to prevent electronic monitoring.11 Obviously, the associated cost of this probably will mean that a commercial CA is a cheaper option. Further details on how to secure your CA are outside the scope of this book. Lastly, using your own CA is generally not trusted by third parties and applications. Users may not accept your certificates, and applications may generate error messages. For example, if a Web browser or mail program encounters a certificate that is signed by a CA that it believes it is not a recognized CA (many browsers and e-mail clients come with a collection of trusted commercial CA root certificates), then it will prompt the user with an error message or series of error messages. However, if you were doing mail server authentication for example, as opposed to a Web page I usually assume that you have a limited number of partners you are going to authenticate with certificates (almost certainly all clients and systems you administer), which means it is more likely those partners will accept a private CA rather than a commercial CA.

production systems, especially e-commerce related systems that use SSL, I recommend you use a commercial CA.

Get film with ID 3 Select Film where FilmID is equal to 3 Get FilmName field from first FilmShowing Get film showings for first film Display orders by order date Order list of films in descending order Select top two orders Skip first orders and select next two

I will now quickly walk you through creating a new CA for your system. This walk-through assumes you are going to create the CA on the local system on which you will use the certificates. You do not have to do it this way, but for the purposes of this explanation it is the easiest approach. First, choose somewhere to store your certificates. I often use /etc/ssl/certs as the location. For the purposes of the following examples, I will use /etc/ssl/certs. Next, initialize your CA. The OpenSSL distribution comes with a script called CA, which has a number of options, including creating a new CA. Listing 3-3 shows the commands and process for creating a new CA. Listing 3-3. Creating a New CA puppy$ cd /etc/ssl/certs puppy# /usr/share/ssl/misc/CA -newca CA certificate filename (or enter to create) Making CA certificate ... Generating a 1024 bit RSA private key ....++++++ .........................++++++ writing new private key to './demoCA/private/./cakey.pem' Enter PEM pass phrase: Verifying - Enter PEM pass phrase: -----

11. See information on TEMPEST at http://searchwebservices.techtarget.com/sDefinition/ 0,,sid26_gci522583,00.html.

You are about to be asked to enter information that will be incorporated into your certificate request. What you are about to enter is what is called a Distinguished Name or a DN. There are quite a few fields but you can leave some blank For some fields there will be a default value, If you enter '.', the field will be left blank. ----Country Name (2 letter code) [GB]:AU State or Province Name (full name) [Berkshire]:New South Wales Locality Name (eg, city) [Newbury]:Sydney Organization Name (eg, company) [My Company Ltd]:yourdomain.com Organizational Unit Name (eg, section) []: Common Name (eg, your name or your server's hostname) []:puppy E-mail Address []:admin@puppy.yourdomain.com In Listing 3-3 I have changed into the directory where I want to put the CA, /etc/ssl/ certs, and then run the CA script with the option -newca. This creates a new CA. Press Enter to create a new CA and then fill in the required details for your new CA, including a passphrase and details of your location, organization, and the system on which the CA is running. Replace the information in Listing 3-3 with the information for your environment, for example, replacing yourdomain.com and puppy with the domain name and hostname of the system on which you are creating the CA.

Films(3) Films $filter=FilmID%20eq%203 FilmShowings(1)/Film/Title Films(1)/FilmShowings Orders $orderby=OrderDate Orders $orderby=OrderDate%20desc Orders $top=2 Orders $skip=1&top=2

s You should treat any CA or certificate passphrases with the same respect as you treat your other sysTip

You are about to be asked to enter information that will be incorporated into your certificate request What you are about to enter is what is called a Distinguished Name or a DN There are quite a few fields but you can leave some blank For some fields there will be a default value, If you enter '', the field will be left blank ----Country Name (2 letter code) [AU]: State or Province Name (full name) [New South Wales]: Locality Name (eg, city) [Sydney]: Organization Name (eg, company) [puppyyourdomaincom]: Organizational Unit Name (eg, section) []: Common Name (eg, your name or your server's hostname) []:puppyyourdomaincom Email Address []:admin@puppyyourdomaincom Please enter the following 'extra' attributes to be sent with your certificate request A challenge password []: An optional company name []: The last two prompts are for extra information.