IBM Computer Hardware 2 User Manual download pdf (Page 290)

CCA Release 2.54

OPINENC (output PIN-block encrypting) key type

The PIN verbs that encrypt a PIN block require the encrypting key to

have a control vector that specifies an OPINENC key type.

KEYGENKY (unique-key-per-transaction base key-generating key) key type

The Encrypted_PIN_Translate and Encrypted_PIN_Verify verbs can

derive a unique key from the KEYGENKY derivation key and

current-key-serial-number to decrypt or encrypt a PIN block.

Supporting Multiple PIN-Calculation Methods

The PIN verbs support multiple PIN-calculation methods. You use a data_array

variable to supply information that a PIN-calculation method requires.

PIN-Calculation Methods

A PIN-calculation method determines the value of an A-PIN in relationship to an

account number. The methods are described in “PIN-Calculation Methods” on

page E-2. The PIN verbs support the following PIN-calculation methods, which you

specify with a keyword in the rule_array variable for a verb:

PIN-Calculation Method Keyword

IBM 3624 PIN IBM-PIN

IBM 3624 PIN Offset IBM-PINO

Netherlands PIN-1 NL-PIN-1

IBM German Bank Pool Institution PIN GBP-PIN

VISA PIN-Validation Value (PVV) VISA-PVV

Interbank PIN INBK-PIN

Data_Array

To supply the information that a PIN-calculation method requires, the PIN verbs use

a data_array variable. Depending on the calculation method and the verb, the data

array elements can include a decimalization table, validation data, an offset or clear

PIN, or transaction security data.

The data array is a 48-byte string made up of three consecutive 16-byte character

strings. Each element must be 16 bytes in length, uppercase, left-justified, and

padded on the right with space characters. Some PIN-calculation methods and

verbs do not require all three elements. However, all three elements must be

declared.

Data Array with IBM-PIN, IBM-PINO, NL-PIN-1, GBP-PIN: When using the

IBM-PIN, the IBM-PINO, the NL-PIN-1, or GBP-PIN method, the data array

contains elements for a decimalization table, validation data, and for certain verbs,

a clear PIN or an offset.

 decimalization_table

The first element in the data array for a PIN-calculation method points to the

decimalization table of 16 characters that are used to map the hexadecimal

digits (X'0' to X'F') of the encrypted validation data to decimal digits (X'0' to

X'9').

8-8 IBM 4758 CCA Basic Services, Release 2.54, February 2005

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