Chapter 15 Certificates

 

Table 78 SECURITY > CERTIFICATES > My Certificates > Details (continued)

 

LABEL

DESCRIPTION

 

Type

This field displays general information about the certificate. CA-signed means

 

 

that a Certification Authority signed the certificate. Self-signed means that the

 

 

certificate’s owner signed the certificate (not a certification authority). “X.509”

 

 

means that this certificate was created and signed according to the ITU-T X.509

 

 

recommendation that defines the formats for public-key certificates.

 

 

 

 

Version

This field displays the X.509 version number.

 

 

 

 

Serial Number

This field displays the certificate’s identification number given by the certification

 

 

authority or generated by the ZyWALL.

 

 

 

 

Subject

This field displays information that identifies the owner of the certificate, such as

 

 

Common Name (CN), Organizational Unit (OU), Organization (O) and Country

 

 

(C).

 

 

 

 

Issuer

This field displays identifying information about the certificate’s issuing

 

 

certification authority, such as Common Name, Organizational Unit,

 

 

Organization and Country.

 

 

With self-signed certificates, this is the same as the Subject Name field.

 

 

 

 

Signature Algorithm

This field displays the type of algorithm that was used to sign the certificate. The

 

 

ZyWALL uses rsa-pkcs1-sha1 (RSA public-private key encryption algorithm and

 

 

the SHA1 hash algorithm). Some certification authorities may use rsa-pkcs1-

 

 

md5 (RSA public-private key encryption algorithm and the MD5 hash algorithm).

 

 

 

 

Valid From

This field displays the date that the certificate becomes applicable. The text

 

 

displays in red and includes a Not Yet Valid! message if the certificate has not

 

 

yet become applicable.

 

 

 

 

Valid To

This field displays the date that the certificate expires. The text displays in red

 

 

and includes an Expiring! or Expired! message if the certificate is about to expire

 

 

or has already expired.

 

 

 

 

Key Algorithm

This field displays the type of algorithm that was used to generate the

 

 

certificate’s key pair (the ZyWALL uses RSA encryption) and the length of the

 

 

key set in bits (1024 bits for example).

 

 

 

 

Subject Alternative

This field displays the certificate owner‘s IP address (IP), domain name (DNS)

 

Name

or e-mail address (EMAIL).

 

 

 

 

Key Usage

This field displays for what functions the certificate’s key can be used. For

 

 

example, “DigitalSignature” means that the key can be used to sign certificates

 

 

and “KeyEncipherment” means that the key can be used to encrypt text.

 

 

 

 

Basic Constraint

This field displays general information about the certificate. For example,

 

 

Subject Type=CA means that this is a certification authority’s certificate and

 

 

“Path Length Constraint=1” means that there can only be one certification

 

 

authority in the certificate’s path.

 

 

 

 

MD5 Fingerprint

This is the certificate’s message digest that the ZyWALL calculated using the

 

 

MD5 algorithm.

 

 

 

 

SHA1 Fingerprint

This is the certificate’s message digest that the ZyWALL calculated using the

 

 

SHA1 algorithm.

 

 

 

 

Certificate in PEM

This read-only text box displays the certificate or certification request in Privacy

 

(Base-64) Encoded

Enhanced Mail (PEM) format. PEM uses 64 ASCII characters to convert the

 

Format

binary certificate into a printable form.

 

 

You can copy and paste a certification request into a certification authority’s web

 

 

page, an e-mail that you send to the certification authority or a text editor and

 

 

save the file on a management computer for later manual enrollment.

 

 

You can copy and paste a certificate into an e-mail to send to friends or

 

 

colleagues or you can copy and paste a certificate into a text editor and save the

 

 

file on a management computer for later distribution (via floppy disk for

 

 

example).

 

 

 

 

301

ZyWALL 2 Plus User’s Guide