LXR linux/drivers/s390/crypto/zcrypt

   1/*
   2 *  zcrypt 2.1.0
   3 *
   4 *  Copyright IBM Corp. 2001, 2012
   5 *  Author(s): Robert Burroughs
   6 *             Eric Rossman (edrossma@us.ibm.com)
   7 *
   8 *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
   9 *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
  10 *  MSGTYPE restruct:             Holger Dengler <hd@linux.vnet.ibm.com>
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of the GNU General Public License as published by
  14 * the Free Software Foundation; either version 2, or (at your option)
  15 * any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20 * GNU General Public License for more details.
  21 *
  22 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25 */
  26
  27#ifndef _ZCRYPT_MSGTYPE6_H_
  28#define _ZCRYPT_MSGTYPE6_H_
  29
  30#include <asm/zcrypt.h>
  31
  32#define MSGTYPE06_NAME                  "zcrypt_msgtype6"
  33#define MSGTYPE06_VARIANT_DEFAULT       0
  34#define MSGTYPE06_VARIANT_NORNG         1
  35
  36#define MSGTYPE06_MAX_MSG_SIZE          (12*1024)
  37
  38/**
  39 * The type 6 message family is associated with PCICC or PCIXCC cards.
  40 *
  41 * It contains a message header followed by a CPRB, both of which
  42 * are described below.
  43 *
  44 * Note that all reserved fields must be zeroes.
  45 */
  46struct type6_hdr {
  47        unsigned char reserved1;        /* 0x00                         */
  48        unsigned char type;             /* 0x06                         */
  49        unsigned char reserved2[2];     /* 0x0000                       */
  50        unsigned char right[4];         /* 0x00000000                   */
  51        unsigned char reserved3[2];     /* 0x0000                       */
  52        unsigned char reserved4[2];     /* 0x0000                       */
  53        unsigned char apfs[4];          /* 0x00000000                   */
  54        unsigned int  offset1;          /* 0x00000058 (offset to CPRB)  */
  55        unsigned int  offset2;          /* 0x00000000                   */
  56        unsigned int  offset3;          /* 0x00000000                   */
  57        unsigned int  offset4;          /* 0x00000000                   */
  58        unsigned char agent_id[16];     /* PCICC:                       */
  59                                        /*    0x0100                    */
  60                                        /*    0x4343412d4150504c202020  */
  61                                        /*    0x010101                  */
  62                                        /* PCIXCC:                      */
  63                                        /*    0x4341000000000000        */
  64                                        /*    0x0000000000000000        */
  65        unsigned char rqid[2];          /* rqid.  internal to 603       */
  66        unsigned char reserved5[2];     /* 0x0000                       */
  67        unsigned char function_code[2]; /* for PKD, 0x5044 (ascii 'PD') */
  68        unsigned char reserved6[2];     /* 0x0000                       */
  69        unsigned int  ToCardLen1;       /* (request CPRB len + 3) & -4  */
  70        unsigned int  ToCardLen2;       /* db len 0x00000000 for PKD    */
  71        unsigned int  ToCardLen3;       /* 0x00000000                   */
  72        unsigned int  ToCardLen4;       /* 0x00000000                   */
  73        unsigned int  FromCardLen1;     /* response buffer length       */
  74        unsigned int  FromCardLen2;     /* db len 0x00000000 for PKD    */
  75        unsigned int  FromCardLen3;     /* 0x00000000                   */
  76        unsigned int  FromCardLen4;     /* 0x00000000                   */
  77} __packed;
  78
  79/**
  80 * The type 86 message family is associated with PCICC and PCIXCC cards.
  81 *
  82 * It contains a message header followed by a CPRB.  The CPRB is
  83 * the same as the request CPRB, which is described above.
  84 *
  85 * If format is 1, an error condition exists and no data beyond
  86 * the 8-byte message header is of interest.
  87 *
  88 * The non-error message is shown below.
  89 *
  90 * Note that all reserved fields must be zeroes.
  91 */
  92struct type86_hdr {
  93        unsigned char reserved1;        /* 0x00                         */
  94        unsigned char type;             /* 0x86                         */
  95        unsigned char format;           /* 0x01 (error) or 0x02 (ok)    */
  96        unsigned char reserved2;        /* 0x00                         */
  97        unsigned char reply_code;       /* reply code (see above)       */
  98        unsigned char reserved3[3];     /* 0x000000                     */
  99} __packed;
 100
 101#define TYPE86_RSP_CODE 0x86
 102#define TYPE86_FMT2     0x02
 103
 104struct type86_fmt2_ext {
 105        unsigned char     reserved[4];  /* 0x00000000                   */
 106        unsigned char     apfs[4];      /* final status                 */
 107        unsigned int      count1;       /* length of CPRB + parameters  */
 108        unsigned int      offset1;      /* offset to CPRB               */
 109        unsigned int      count2;       /* 0x00000000                   */
 110        unsigned int      offset2;      /* db offset 0x00000000 for PKD */
 111        unsigned int      count3;       /* 0x00000000                   */
 112        unsigned int      offset3;      /* 0x00000000                   */
 113        unsigned int      count4;       /* 0x00000000                   */
 114        unsigned int      offset4;      /* 0x00000000                   */
 115} __packed;
 116
 117/**
 118 * Prepare a type6 CPRB message for random number generation
 119 *
 120 * @ap_dev: AP device pointer
 121 * @ap_msg: pointer to AP message
 122 */
 123static inline void rng_type6CPRB_msgX(struct ap_device *ap_dev,
 124                               struct ap_message *ap_msg,
 125                               unsigned random_number_length)
 126{
 127        struct {
 128                struct type6_hdr hdr;
 129                struct CPRBX cprbx;
 130                char function_code[2];
 131                short int rule_length;
 132                char rule[8];
 133                short int verb_length;
 134                short int key_length;
 135        } __packed * msg = ap_msg->message;
 136        static struct type6_hdr static_type6_hdrX = {
 137                .type           = 0x06,
 138                .offset1        = 0x00000058,
 139                .agent_id       = {'C', 'A'},
 140                .function_code  = {'R', 'L'},
 141                .ToCardLen1     = sizeof(*msg) - sizeof(msg->hdr),
 142                .FromCardLen1   = sizeof(*msg) - sizeof(msg->hdr),
 143        };
 144        static struct CPRBX local_cprbx = {
 145                .cprb_len       = 0x00dc,
 146                .cprb_ver_id    = 0x02,
 147                .func_id        = {0x54, 0x32},
 148                .req_parml      = sizeof(*msg) - sizeof(msg->hdr) -
 149                                  sizeof(msg->cprbx),
 150                .rpl_msgbl      = sizeof(*msg) - sizeof(msg->hdr),
 151        };
 152
 153        msg->hdr = static_type6_hdrX;
 154        msg->hdr.FromCardLen2 = random_number_length,
 155        msg->cprbx = local_cprbx;
 156        msg->cprbx.rpl_datal = random_number_length,
 157        msg->cprbx.domain = AP_QID_QUEUE(ap_dev->qid);
 158        memcpy(msg->function_code, msg->hdr.function_code, 0x02);
 159        msg->rule_length = 0x0a;
 160        memcpy(msg->rule, "RANDOM  ", 8);
 161        msg->verb_length = 0x02;
 162        msg->key_length = 0x02;
 163        ap_msg->length = sizeof(*msg);
 164}
 165
 166int zcrypt_msgtype6_init(void);
 167void zcrypt_msgtype6_exit(void);
 168
 169#endif /* _ZCRYPT_MSGTYPE6_H_ */
 170