The return code specifies the general result of the callable service. Appendix A. ICSF and TSS Return and Reason Codes lists the return codes.

The reason code specifies the result of the callable service that is returned to the application program. Each return code has different reason codes that indicate specific processing problems. Appendix A. ICSF and TSS Return and Reason Codes lists the reason codes.

The length of the data that is passed to the installation exit. The length can be from X'00000000' to X'7FFFFFFF' (2 gigabytes). The data is identified in the exit_data parameter.

The data that is passed to the installation exit.

The 8-byte keyword of 'MAC ' or 'MACD ' that specifies the key type to be generated. The keyword must be left-justified and padded on the right with blanks. MAC specifies an 8-byte, single-length MAC key which is used in the ANSI X9.9-1 or the ANSI X9.19 basic MAC processing rules. MACD specifies a 16-byte, double-length internal MAC key that uses the single-length control vector for both the left and right half of the key (MAC MAC). The double-length MAC key is used in the ANSI X9.19 optional double-key MAC processing rules. The keyword 'TOKEN ' is also accepted. If you specify TOKEN with a rule_array of VISA or NOFORMAT, the key type is determined by the valid internal token of the single-length or double-length MAC key in the generated_key_identifier parameter. If you specify TOKEN with a rule_array of SESS-MAC, the key type is determined by the valid internal token of the single-length or double-length MAC key in the source_key_identifier.

The number of keywords specified in the rule_array parameter. The value must be 1.

The process rule for the user derived key in an 8-byte field. The keywords must be in 8 bytes of contiguous storage, left-justified and padded on the right with blanks.

The keywords are shown in Table 124.

For a rule_array value of VISA or NOFORMAT, this is a 64-byte key label or internal key token of the derivation key used to generate the user derived key. The key must be an EXPORTER key type. For any other keyword, this field must be a null token.

For a rule_array value of SESS-MAC, this is a 64-byte internal token of a single-length or double-length MAC key. For any other keyword, this field must be a null token.

Two 16-byte data elements required by the corresponding rule_array and key_type parameters. The data array consists of two 16-byte hexadecimal character fields whose specification depends on the process rule and key type. VISA requires only one 16-byte hexadecimal character input. Both NOFORMAT and SESS-MAC require one 16-byte input for a key type of MAC and two 16-byte inputs for a key type of MACD. If only one 16-byte field is required, then the rest of the data array is ignored by the callable service.

The 64-byte internal token of the generated single-length or double-length MAC key. This is an input field only if TOKEN is specified for key_type.