ADC Advanced Policy Expressions

CLIENT_HELLO_T

June 28, 2023

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Client Hello SSL

This topic lists the expressions that are provided by this class.

CIPHERS

Returns the supported ciphers proposed by the client in the client hello message.

Returns: cipher_t

CLIENT_VERSION

Returns the version from the message-header of the client hello message.

Returns: num_at

IS_RENEGOTIATE

Returns true if renegotiation is initiated in ongoing SSL session, else returns false.

Returns: bool_at

IS_REUSE

Returns true if reuse is proposed by client, else returns false.

Returns: bool_at

IS_SCSV

Returns true if in client hello SCSV (Signalling Cipher Suite Value) is advertised, else returns false.

SCSV prevents protocol downgrade attack.

Returns: bool_at

IS_SESSION_TICKET

Returns true if in client hello session ticket is advertised, else returns false.

Returns: bool_at

LENGTH

Returns the length in the message-header of the client hello message.

Returns: num_at

SNI

Returns SNI from CLIENT HELLO

In the case of non-SSL transaction or error in client hello, returns

an empty string.

Returns: ssl_text_t

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CLIENT_HELLO_T

June 28, 2023

Contributed by:

June 28, 2023

Contributed by:

CLIENT_HELLO_T

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