IBM Computer Hardware 2 Manual de usuario descargar pdf (Pagina 255)

100

101

CCA Release 2.54 MAC_Generate

chaining_vector

The chaining_vector parameter is a pointer to a string variable containing a

work area the security server uses to carry segmented data between procedure

calls.

Note: The application program must not change the data in this variable.

MAC

The MAC parameter is a pointer to a string variable containing the resulting

MAC returned by the verb. The value is left-justified in the variable. Allocate a

variable large enough to receive the resulting MAC value.

Keyword Meaning

Segmenting control (one, optional)

ONLY Specifies the application program does not use segmenting.

This is the default.

FIRST Specifies this is the first segment of data from the application

program.

MIDDLE Specifies this is an intermediate segment of data from the

application program.

LAST Specifies this is the last segment of data from the application

program.

MAC length and presentation (one, optional)

MACLEN4 Specifies a four-byte MAC. This is the default.

MACLEN6 Specifies a six-byte MAC.

MACLEN8 Specifies an eight-byte MAC.

HEX-8 Specifies a four-byte MAC and presents it as eight

hexadecimal characters.

HEX-9 Specifies a four-byte MAC and presents it as two groups of

four hexadecimal characters separated by a space character.

Required Commands

The MAC_Generate verb requires the Generate MAC command (offset X'0010') to

be enabled in the hardware.

Chapter 6. Data Confidentiality and Data Integrity 6-13

1 2 ... 250 251 252 253 254 255 256 257 258 259 260 ... 507 508

Comentarios a estos manuales

Sin comentarios

IBM Computer Hardware 2 Manual de usuario Pagina 255

Comentarios a estos manuales

Relacionado con productos y manuales para Software IBM Computer Hardware 2