ENCBK Back to Index page
 
Prolog 
Control Block Contents 
   ENCBK DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  ENCBK Prolog Top of page
  
 NAME       : HCPENCBK
 DESCRIPTION: Encryption Data Block
 DSECT      : ENCBK
 FUNCTION   : Contains information related to Encryption
              settings on the system.
 LOCATED BY : SYSENCBK pointer of system.
 CREATED BY : HCPIIO During CP initialization
 DELETED BY : Never deleted
 SERIALIZED : ENCLOCK lock in this control block
 RELOCATION CONSIDERATIONS : None
 
 
  ENCBK Control Block Content Top of page
  




 ENCBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      ENCBK          Encryption Data Block
0000    0 Dbl-Word     8 ENCLOCK (3)    Lck for control blk serialization
0018   24 Bitstring    1 ENCHIST        Services that used encryption
          1... ....      EPALG128       X'80' EPALG128 Paging has used
                                        AES128
          .1.. ....      EPALG192       X'40' EPALG192 Paging has used
                                        AES192
          ..1. ....      EPALG256       X'20' EPALG256 Paging has used
                                        AES256
0019   25 Bitstring    1 ENCFLG         Set Encrypt command flag
          1... ....      ENCPAG         X'80' ENCPAG New Set ENCRYPT
                                        PAGING issued
001A   26 Bitstring    1 ENCPSET        ENCRYPT PAGING current setting
          1... ....      ENCPON         X'80' ENCPON ENCRYPT PAGING set
                                        ON
          .1.. ....      ENCPOFF        X'40' ENCPOFF ENCRYPT PAGING set
                                        OFF
          ..1. ....      ENCPREQ        X'20' ENCPREQ ENCRYPT PAGING set
                                        REQUIRED
001B   27 Bitstring    1 ENCPALG        ENCRYPT PAGING current algorithm
          1... ....      ENCP128        X'80' ENCP128 AES128 was
                                        specified
          .1.. ....      ENCP192        X'40' ENCP192 AES192 was
                                        specified
          ..1. ....      ENCP256        X'20' ENCP256 AES256 was
                                        specified
001C   28 Bitstring    1 ENCINFL        Service requested at IPL
          1... ....      ENCPAGI        X'80' ENCPAGI PAGING
001D   29 Bitstring    1 ENCPINI        ENCRYPT PAGING config. setting
                                        Bits for ENCPINI defined by
                                        HCPENCBK ENCPSET
001E   30 Bitstring    1 ENCIPAL        Initial Paging Algorithm Flag
                                        Bits for ENCIPAL defined by
                                        HCPENCBK ENCPALG
001F   31 Bitstring    1 *              Reserved for IBM use
0020   32 Address      8 ENCPKEY        Master key for processor pointer
        Encryption Event Monitor Data
0028   40 Signed       4 * (0)          Full word boundary
0028   40 Character    8 ENCSERV        CP service to cipher
       Byte ENCPREV must have the same bit definitions as ENCCUR
0030   48 Bitstring    1 ENCPREV        Previous encryption settings
0031   49 Bitstring    1 ENCCUR         Current encryption settings
          1... ....      ENCREQC        X'80' ENCREQC ENCRYPT Required
          .1.. ....      ENCONC         X'40' ENCONC ENCRYPT On
          ..1. ....      ENCOFFC        X'20' ENCOFFC ENCRYPT Off
          ...1 ....      ENC128C        X'10' ENC128C Algorithm AES128
          .... 1...      ENC192C        X'08' ENC192C Algorithm AES192
          .... .1..      ENC256C        X'04' ENC256C Algorithm AES256
                                        X'02' Reserved for IBM use X'01'
                                        Reserved for IBM use
0032   50 Bitstring    1 * (2)          Reserved for IBM use
0034   52 Character    8 ENCUSRID       USERID that made the change
        Encrypt Paging Configuration Monitor Data
003C   60 Signed       4 * (0)          Full word boundary
003C   60 Bitstring    1 ENCPINIT       ENCRYPT PAGING at IPL
          1... ....      ENCPREQI       X'80' ENCPREQI ENCRYPT PAGING
                                        Required
          .1.. ....      ENCPONI        X'40' ENCPONI ENCRYPT PAGING On
          ..1. ....      ENCPOFFI       X'20' ENCPOFFI ENCRYPT PAGING Off
          ...1 ....      ENCP128I       X'10' ENCP128I Algorithm AES128
          .... 1...      ENCP192I       X'08' ENCP192I Algorithm AES192
          .... .1..      ENCP256I       X'04' ENCP256I Algorithm AES256
                                        X'02' Reserved for IBM use X'01'
                                        Reserved for IBM use
003D   61 Bitstring    1 ENCEPCUR       Current state of Encrypt Paging
                                        Bits for ENCEPCUR defined by
                                        HCPENCBK ENCPINIT
003E   62 Bitstring    1 ENCFAIL        Encrypt service failure codes
          1... ....      ENCPACF        X'80' ENCPACF CPACF hardware not
                                        available
003F   63 Bitstring    6 *              Reserved for IBM use
          00000045       ENCBKSIZ       *-ENCBK Size of ENCBK in Bytes
          00000009       ENCBKSZD       (*-ENCBK+7)/8 Size of ENCBK in
                                        Doublewords
 
 
  ENCBK Storage Layout Top of page
  
          
*** ENCBK - Encryption Data Block
*
*     +-------------------------------------------------------+
*   0 |                                                       |
*     =                       ENCLOCK                         =
*     |                                                       |
*     +------+------+------+------+------+------+------+------+
*  18 |:HIST |ENCFLG|:PSET |:PALG |:INFL |:PINI |:IPAL |//////|
*     +------+------+------+------+------+------+------+------+
*  20 |                       ENCPKEY                         |
*     +-------------------------------------------------------+
*  28 |                       ENCSERV                         |
*     +------+------+-------------+---------------------------+
*  30 |:PREV |ENCCUR|/////////////|        ENCUSRID-          |
*     +------+------+-------------+------+------+------+------+
*  38 |          -(034)           |:PINIT|:EPCUR|:FAIL |//////|
*     +---------------------------+------+------+------+------+
*  40 |//////////////////////////////////| 45
*     +----------------------------------+
*
*** ENCBK - Encryption Data Block
 
 
  ENCBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
ENCBKSIZ       003F 00000045
ENCBKSZD       003F 00000009
ENCCUR         0031
ENCEPCUR       003D
ENCFAIL        003E
ENCFLG         0019
ENCHIST        0018
ENCINFL        001C
ENCIPAL        001E
ENCLOCK        0000
ENCOFFC        0031 20
ENCONC         0031 40
ENCPACF        003E 80
ENCPAG         0019 80
ENCPAGI        001C 80
ENCPALG        001B
ENCPINI        001D
ENCPINIT       003C
ENCPKEY        0020
ENCPOFF        001A 40
ENCPOFFI       003C 20
ENCPON         001A 80
ENCPONI        003C 40
ENCPREQ        001A 20
ENCPREQI       003C 80
ENCPREV        0030
ENCPSET        001A
ENCP128        001B 80
ENCP128I       003C 10
ENCP192        001B 40
ENCP192I       003C 08
ENCP256        001B 20
ENCP256I       003C 04
ENCREQC        0031 80
ENCSERV        0028
ENCUSRID       0034
ENC128C        0031 10
ENC192C        0031 08
ENC256C        0031 04
EPALG128       0018 80
EPALG192       0018 40
EPALG256       0018 20
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:50:14 EDT.
Copyright IBM Corporation, 1990, 2022