drivers/s390/crypto/zcrypt_msgtype6.h

   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  */
  46 struct 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  */
  92 struct 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
 104 struct 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  */
 123 static 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
 166 int zcrypt_msgtype6_init(void);
 167 void zcrypt_msgtype6_exit(void);
 168
 169 #endif /* _ZCRYPT_MSGTYPE6_H_ */