ZyWALL 5/35/70 Series User’s Guide

 

Table 116 Trusted CA Details (continued)

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

Certification Path

Click the Refresh button to have this read-only text box display the end entity’s

 

 

certificate and a list of certification authority certificates that shows the hierarchy

 

 

of certification authorities that validate the end entity’s certificate. If the issuing

 

 

certification authority is one that you have imported as a trusted certification

 

 

authority, it may be the only certification authority in the list (along with the end

 

 

entity’s own certificate). The ZyWALL does not trust the end entity’s certificate

 

 

and displays “Not trusted” in this field if any certificate on the path has expired or

 

 

been revoked.

 

Refresh

Click Refresh to display the certification path.

 

 

 

 

Certificate

These read-only fields display detailed information about the certificate.

 

Information

 

 

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.

 

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 information as in the Subject

 

 

Name field.

 

Signature Algorithm

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

 

 

Some certification authorities use rsa-pkcs1-sha1 (RSA public-private key

 

 

encryption algorithm and the SHA1 hash algorithm). Other 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’s 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.

Chapter 20 Certificates

354