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Citrix Systems 9.2 Benutzerhandbuch

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Chapter 7        Advanced Expressions: Parsing SSL Certificates
143
Prefixes for Numeric Data in SSL Certificates
The following table describes prefixes that evaluate numeric data other than dates 
in SSL certificates. These prefixes can be used with the operations that are 
described in 
Note:
For expressions related to expiration dates in a certificate, see 
Expressions for SSL Certificates
You can parse SSL certificates by configuring expressions that use the following 
prefix:
CLIENT.SSL.CIPHER_NAME
Returns the name of the SSL Cipher if invoked 
from an SSL connection, and a NULL string if 
invoked from a non-SSL connection.
CLIENT.SSL.IS_SSL
Returns a Boolean TRUE if the current connection 
is SSL-based.
Prefixes That Return Text or Boolean Values for SSL and Client Certificate Data
Prefix
Description
Prefixes That Evaluate Numeric Data Other Than Dates in SSL Certificates
Prefix
Description
CLIENT.SSL.CLIENT_CERT.
DAYS_TO_EXPIRE
Returns the number of days that the certificate is 
valid, or returns -1 for expired certificates.
CLIENT.SSL.CLIENT_CERT.
PK_SIZE
Returns the size of the public key used in the 
certificate.
CLIENT.SSL.CLIENT_CERT.
VERSION
Returns the version number of the certificate. If the 
connection is not SSL-based, returns zero (0).
CLIENT.SSL.CIPHER_BITS
Returns the number of bits in the cryptograhic key. 
Returns 0 if the connection is not SSL based.
CLIENT.SSL.VERSION
Returns a number that represents the SSL protocol 
version, as follows:
• 0. The transaction is not SSL based. 
• 0x002. The transaction is SSLv2. 
• 0x300. The transaction is SSLv3. 
• 0x301. The transaction is TLSv1.