LXR linux/drivers/s390/crypto/zcrypt

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 *  Copyright IBM Corp. 2001, 2012
   4 *  Author(s): Robert Burroughs
   5 *             Eric Rossman (edrossma@us.ibm.com)
   6 *
   7 *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
   8 *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
   9 *  MSGTYPE restruct:             Holger Dengler <hd@linux.vnet.ibm.com>
  10 */
  11
  12#ifndef _ZCRYPT_MSGTYPE6_H_
  13#define _ZCRYPT_MSGTYPE6_H_
  14
  15#include <asm/zcrypt.h>
  16
  17#define MSGTYPE06_NAME                  "zcrypt_msgtype6"
  18#define MSGTYPE06_VARIANT_DEFAULT       0
  19#define MSGTYPE06_VARIANT_NORNG         1
  20#define MSGTYPE06_VARIANT_EP11          2
  21
  22#define MSGTYPE06_MAX_MSG_SIZE          (12*1024)
  23
  24/**
  25 * The type 6 message family is associated with CEXxC/CEXxP cards.
  26 *
  27 * It contains a message header followed by a CPRB, both of which
  28 * are described below.
  29 *
  30 * Note that all reserved fields must be zeroes.
  31 */
  32struct type6_hdr {
  33        unsigned char reserved1;        /* 0x00                         */
  34        unsigned char type;             /* 0x06                         */
  35        unsigned char reserved2[2];     /* 0x0000                       */
  36        unsigned char right[4];         /* 0x00000000                   */
  37        unsigned char reserved3[2];     /* 0x0000                       */
  38        unsigned char reserved4[2];     /* 0x0000                       */
  39        unsigned char apfs[4];          /* 0x00000000                   */
  40        unsigned int  offset1;          /* 0x00000058 (offset to CPRB)  */
  41        unsigned int  offset2;          /* 0x00000000                   */
  42        unsigned int  offset3;          /* 0x00000000                   */
  43        unsigned int  offset4;          /* 0x00000000                   */
  44        unsigned char agent_id[16];     /* 0x4341000000000000           */
  45                                        /* 0x0000000000000000           */
  46        unsigned char rqid[2];          /* rqid.  internal to 603       */
  47        unsigned char reserved5[2];     /* 0x0000                       */
  48        unsigned char function_code[2]; /* for PKD, 0x5044 (ascii 'PD') */
  49        unsigned char reserved6[2];     /* 0x0000                       */
  50        unsigned int  ToCardLen1;       /* (request CPRB len + 3) & -4  */
  51        unsigned int  ToCardLen2;       /* db len 0x00000000 for PKD    */
  52        unsigned int  ToCardLen3;       /* 0x00000000                   */
  53        unsigned int  ToCardLen4;       /* 0x00000000                   */
  54        unsigned int  FromCardLen1;     /* response buffer length       */
  55        unsigned int  FromCardLen2;     /* db len 0x00000000 for PKD    */
  56        unsigned int  FromCardLen3;     /* 0x00000000                   */
  57        unsigned int  FromCardLen4;     /* 0x00000000                   */
  58} __packed;
  59
  60/**
  61 * The type 86 message family is associated with CEXxC/CEXxP cards.
  62 *
  63 * It contains a message header followed by a CPRB.  The CPRB is
  64 * the same as the request CPRB, which is described above.
  65 *
  66 * If format is 1, an error condition exists and no data beyond
  67 * the 8-byte message header is of interest.
  68 *
  69 * The non-error message is shown below.
  70 *
  71 * Note that all reserved fields must be zeroes.
  72 */
  73struct type86_hdr {
  74        unsigned char reserved1;        /* 0x00                         */
  75        unsigned char type;             /* 0x86                         */
  76        unsigned char format;           /* 0x01 (error) or 0x02 (ok)    */
  77        unsigned char reserved2;        /* 0x00                         */
  78        unsigned char reply_code;       /* reply code (see above)       */
  79        unsigned char reserved3[3];     /* 0x000000                     */
  80} __packed;
  81
  82#define TYPE86_RSP_CODE 0x86
  83#define TYPE87_RSP_CODE 0x87
  84#define TYPE86_FMT2     0x02
  85
  86struct type86_fmt2_ext {
  87        unsigned char     reserved[4];  /* 0x00000000                   */
  88        unsigned char     apfs[4];      /* final status                 */
  89        unsigned int      count1;       /* length of CPRB + parameters  */
  90        unsigned int      offset1;      /* offset to CPRB               */
  91        unsigned int      count2;       /* 0x00000000                   */
  92        unsigned int      offset2;      /* db offset 0x00000000 for PKD */
  93        unsigned int      count3;       /* 0x00000000                   */
  94        unsigned int      offset3;      /* 0x00000000                   */
  95        unsigned int      count4;       /* 0x00000000                   */
  96        unsigned int      offset4;      /* 0x00000000                   */
  97} __packed;
  98
  99unsigned int get_cprb_fc(struct ica_xcRB *, struct ap_message *,
 100                         unsigned int *, unsigned short **);
 101unsigned int get_ep11cprb_fc(struct ep11_urb *, struct ap_message *,
 102                             unsigned int *);
 103unsigned int get_rng_fc(struct ap_message *, int *, unsigned int *);
 104
 105#define LOW     10
 106#define MEDIUM  100
 107#define HIGH    500
 108
 109int speed_idx_cca(int);
 110int speed_idx_ep11(int);
 111
 112/**
 113 * Prepare a type6 CPRB message for random number generation
 114 *
 115 * @ap_dev: AP device pointer
 116 * @ap_msg: pointer to AP message
 117 */
 118static inline void rng_type6CPRB_msgX(struct ap_message *ap_msg,
 119                                      unsigned int random_number_length,
 120                                      unsigned int *domain)
 121{
 122        struct {
 123                struct type6_hdr hdr;
 124                struct CPRBX cprbx;
 125                char function_code[2];
 126                short int rule_length;
 127                char rule[8];
 128                short int verb_length;
 129                short int key_length;
 130        } __packed * msg = ap_msg->message;
 131        static struct type6_hdr static_type6_hdrX = {
 132                .type           = 0x06,
 133                .offset1        = 0x00000058,
 134                .agent_id       = {'C', 'A'},
 135                .function_code  = {'R', 'L'},
 136                .ToCardLen1     = sizeof(*msg) - sizeof(msg->hdr),
 137                .FromCardLen1   = sizeof(*msg) - sizeof(msg->hdr),
 138        };
 139        static struct CPRBX local_cprbx = {
 140                .cprb_len       = 0x00dc,
 141                .cprb_ver_id    = 0x02,
 142                .func_id        = {0x54, 0x32},
 143                .req_parml      = sizeof(*msg) - sizeof(msg->hdr) -
 144                                  sizeof(msg->cprbx),
 145                .rpl_msgbl      = sizeof(*msg) - sizeof(msg->hdr),
 146        };
 147
 148        msg->hdr = static_type6_hdrX;
 149        msg->hdr.FromCardLen2 = random_number_length,
 150        msg->cprbx = local_cprbx;
 151        msg->cprbx.rpl_datal = random_number_length,
 152        memcpy(msg->function_code, msg->hdr.function_code, 0x02);
 153        msg->rule_length = 0x0a;
 154        memcpy(msg->rule, "RANDOM  ", 8);
 155        msg->verb_length = 0x02;
 156        msg->key_length = 0x02;
 157        ap_msg->length = sizeof(*msg);
 158        *domain = (unsigned short)msg->cprbx.domain;
 159}
 160
 161void zcrypt_msgtype6_init(void);
 162void zcrypt_msgtype6_exit(void);
 163
 164#endif /* _ZCRYPT_MSGTYPE6_H_ */
 165