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gfiber / kernel / quantenna / ed2eebbd61af8d378ca39ad7aef7017f29eed6f3 / . / drivers / s390 / crypto / zcrypt_msgtype6.c
blob: 21959719daef94a00bd3f40282a2022077ec1344 [file] [log] [blame]
/*
* zcrypt 2.1.0
*
* Copyright IBM Corp. 2001, 2012
* Author(s): Robert Burroughs
* Eric Rossman (edrossma@us.ibm.com)
*
* Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
* Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Ralph Wuerthner <rwuerthn@de.ibm.com>
* MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define KMSG_COMPONENT "zcrypt"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/atomic.h>
#include <linux/uaccess.h>
#include "ap_bus.h"
#include "zcrypt_api.h"
#include "zcrypt_error.h"
#include "zcrypt_msgtype6.h"
#include "zcrypt_cca_key.h"
#define PCIXCC_MIN_MOD_SIZE_OLD 64 /* 512 bits */
#define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply */
#define CEIL4(x) ((((x)+3)/4)*4)
struct response_type {
struct completion work;
int type;
};
#define PCIXCC_RESPONSE_TYPE_ICA 0
#define PCIXCC_RESPONSE_TYPE_XCRB 1
#define PCIXCC_RESPONSE_TYPE_EP11 2
MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("Cryptographic Coprocessor (message type 6), " \
"Copyright IBM Corp. 2001, 2012");
MODULE_LICENSE("GPL");
static void zcrypt_msgtype6_receive(struct ap_device *, struct ap_message *,
struct ap_message *);
/**
* CPRB
* Note that all shorts, ints and longs are little-endian.
* All pointer fields are 32-bits long, and mean nothing
*
* A request CPRB is followed by a request_parameter_block.
*
* The request (or reply) parameter block is organized thus:
* function code
* VUD block
* key block
*/
struct CPRB {
unsigned short cprb_len; /* CPRB length */
unsigned char cprb_ver_id; /* CPRB version id. */
unsigned char pad_000; /* Alignment pad byte. */
unsigned char srpi_rtcode[4]; /* SRPI return code LELONG */
unsigned char srpi_verb; /* SRPI verb type */
unsigned char flags; /* flags */
unsigned char func_id[2]; /* function id */
unsigned char checkpoint_flag; /* */
unsigned char resv2; /* reserved */
unsigned short req_parml; /* request parameter buffer */
/* length 16-bit little endian */
unsigned char req_parmp[4]; /* request parameter buffer *
* pointer (means nothing: the *
* parameter buffer follows *
* the CPRB). */
unsigned char req_datal[4]; /* request data buffer */
/* length ULELONG */
unsigned char req_datap[4]; /* request data buffer */
/* pointer */
unsigned short rpl_parml; /* reply parameter buffer */
/* length 16-bit little endian */
unsigned char pad_001[2]; /* Alignment pad bytes. ULESHORT */
unsigned char rpl_parmp[4]; /* reply parameter buffer *
* pointer (means nothing: the *
* parameter buffer follows *
* the CPRB). */
unsigned char rpl_datal[4]; /* reply data buffer len ULELONG */
unsigned char rpl_datap[4]; /* reply data buffer */
/* pointer */
unsigned short ccp_rscode; /* server reason code ULESHORT */
unsigned short ccp_rtcode; /* server return code ULESHORT */
unsigned char repd_parml[2]; /* replied parameter len ULESHORT*/
unsigned char mac_data_len[2]; /* Mac Data Length ULESHORT */
unsigned char repd_datal[4]; /* replied data length ULELONG */
unsigned char req_pc[2]; /* PC identifier */
unsigned char res_origin[8]; /* resource origin */
unsigned char mac_value[8]; /* Mac Value */
unsigned char logon_id[8]; /* Logon Identifier */
unsigned char usage_domain[2]; /* cdx */
unsigned char resv3[18]; /* reserved for requestor */
unsigned short svr_namel; /* server name length ULESHORT */
unsigned char svr_name[8]; /* server name */
} __packed;
struct function_and_rules_block {
unsigned char function_code[2];
unsigned short ulen;
unsigned char only_rule[8];
} __packed;
/**
* The following is used to initialize the CPRBX passed to the PCIXCC/CEX2C
* card in a type6 message. The 3 fields that must be filled in at execution
* time are req_parml, rpl_parml and usage_domain.
* Everything about this interface is ascii/big-endian, since the
* device does *not* have 'Intel inside'.
*
* The CPRBX is followed immediately by the parm block.
* The parm block contains:
* - function code ('PD' 0x5044 or 'PK' 0x504B)
* - rule block (one of:)
* + 0x000A 'PKCS-1.2' (MCL2 'PD')
* + 0x000A 'ZERO-PAD' (MCL2 'PK')
* + 0x000A 'ZERO-PAD' (MCL3 'PD' or CEX2C 'PD')
* + 0x000A 'MRP ' (MCL3 'PK' or CEX2C 'PK')
* - VUD block
*/
static struct CPRBX static_cprbx = {
.cprb_len = 0x00DC,
.cprb_ver_id = 0x02,
.func_id = {0x54, 0x32},
};
/**
* Convert a ICAMEX message to a type6 MEX message.
*
* @zdev: crypto device pointer
* @ap_msg: pointer to AP message
* @mex: pointer to user input data
*
* Returns 0 on success or -EFAULT.
*/
static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_device *zdev,
struct ap_message *ap_msg,
struct ica_rsa_modexpo *mex)
{
static struct type6_hdr static_type6_hdrX = {
.type = 0x06,
.offset1 = 0x00000058,
.agent_id = {'C', 'A',},
.function_code = {'P', 'K'},
};
static struct function_and_rules_block static_pke_fnr = {
.function_code = {'P', 'K'},
.ulen = 10,
.only_rule = {'M', 'R', 'P', ' ', ' ', ' ', ' ', ' '}
};
static struct function_and_rules_block static_pke_fnr_MCL2 = {
.function_code = {'P', 'K'},
.ulen = 10,
.only_rule = {'Z', 'E', 'R', 'O', '-', 'P', 'A', 'D'}
};
struct {
struct type6_hdr hdr;
struct CPRBX cprbx;
struct function_and_rules_block fr;
unsigned short length;
char text[0];
} __packed * msg = ap_msg->message;
int size;
/* VUD.ciphertext */
msg->length = mex->inputdatalength + 2;
if (copy_from_user(msg->text, mex->inputdata, mex->inputdatalength))
return -EFAULT;
/* Set up key which is located after the variable length text. */
size = zcrypt_type6_mex_key_en(mex, msg->text+mex->inputdatalength, 1);
if (size < 0)
return size;
size += sizeof(*msg) + mex->inputdatalength;
/* message header, cprbx and f&r */
msg->hdr = static_type6_hdrX;
msg->hdr.ToCardLen1 = size - sizeof(msg->hdr);
msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);
msg->cprbx = static_cprbx;
msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
msg->cprbx.rpl_msgbl = msg->hdr.FromCardLen1;
msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
static_pke_fnr_MCL2 : static_pke_fnr;
msg->cprbx.req_parml = size - sizeof(msg->hdr) - sizeof(msg->cprbx);
ap_msg->length = size;
return 0;
}
/**
* Convert a ICACRT message to a type6 CRT message.
*
* @zdev: crypto device pointer
* @ap_msg: pointer to AP message
* @crt: pointer to user input data
*
* Returns 0 on success or -EFAULT.
*/
static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_device *zdev,
struct ap_message *ap_msg,
struct ica_rsa_modexpo_crt *crt)
{
static struct type6_hdr static_type6_hdrX = {
.type = 0x06,
.offset1 = 0x00000058,
.agent_id = {'C', 'A',},
.function_code = {'P', 'D'},
};
static struct function_and_rules_block static_pkd_fnr = {
.function_code = {'P', 'D'},
.ulen = 10,
.only_rule = {'Z', 'E', 'R', 'O', '-', 'P', 'A', 'D'}
};
static struct function_and_rules_block static_pkd_fnr_MCL2 = {
.function_code = {'P', 'D'},
.ulen = 10,
.only_rule = {'P', 'K', 'C', 'S', '-', '1', '.', '2'}
};
struct {
struct type6_hdr hdr;
struct CPRBX cprbx;
struct function_and_rules_block fr;
unsigned short length;
char text[0];
} __packed * msg = ap_msg->message;
int size;
/* VUD.ciphertext */
msg->length = crt->inputdatalength + 2;
if (copy_from_user(msg->text, crt->inputdata, crt->inputdatalength))
return -EFAULT;
/* Set up key which is located after the variable length text. */
size = zcrypt_type6_crt_key(crt, msg->text + crt->inputdatalength, 1);
if (size < 0)
return size;
size += sizeof(*msg) + crt->inputdatalength; /* total size of msg */
/* message header, cprbx and f&r */
msg->hdr = static_type6_hdrX;
msg->hdr.ToCardLen1 = size - sizeof(msg->hdr);
msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);
msg->cprbx = static_cprbx;
msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
msg->cprbx.req_parml = msg->cprbx.rpl_msgbl =
size - sizeof(msg->hdr) - sizeof(msg->cprbx);
msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
static_pkd_fnr_MCL2 : static_pkd_fnr;
ap_msg->length = size;
return 0;
}
/**
* Convert a XCRB message to a type6 CPRB message.
*
* @zdev: crypto device pointer
* @ap_msg: pointer to AP message
* @xcRB: pointer to user input data
*
* Returns 0 on success or -EFAULT, -EINVAL.
*/
struct type86_fmt2_msg {
struct type86_hdr hdr;
struct type86_fmt2_ext fmt2;
} __packed;
static int XCRB_msg_to_type6CPRB_msgX(struct zcrypt_device *zdev,
struct ap_message *ap_msg,
struct ica_xcRB *xcRB)
{
static struct type6_hdr static_type6_hdrX = {
.type = 0x06,
.offset1 = 0x00000058,
};
struct {
struct type6_hdr hdr;
struct CPRBX cprbx;
} __packed * msg = ap_msg->message;
int rcblen = CEIL4(xcRB->request_control_blk_length);
int replylen, req_sumlen, resp_sumlen;
char *req_data = ap_msg->message + sizeof(struct type6_hdr) + rcblen;
char *function_code;
if (CEIL4(xcRB->request_control_blk_length) <
xcRB->request_control_blk_length)
return -EINVAL; /* overflow after alignment*/
/* length checks */
ap_msg->length = sizeof(struct type6_hdr) +
CEIL4(xcRB->request_control_blk_length) +
xcRB->request_data_length;
if (ap_msg->length > MSGTYPE06_MAX_MSG_SIZE)
return -EINVAL;
/* Overflow check
sum must be greater (or equal) than the largest operand */
req_sumlen = CEIL4(xcRB->request_control_blk_length) +
xcRB->request_data_length;
if ((CEIL4(xcRB->request_control_blk_length) <=
xcRB->request_data_length) ?
(req_sumlen < xcRB->request_data_length) :
(req_sumlen < CEIL4(xcRB->request_control_blk_length))) {
return -EINVAL;
}
if (CEIL4(xcRB->reply_control_blk_length) <
xcRB->reply_control_blk_length)
return -EINVAL; /* overflow after alignment*/
replylen = sizeof(struct type86_fmt2_msg) +
CEIL4(xcRB->reply_control_blk_length) +
xcRB->reply_data_length;
if (replylen > MSGTYPE06_MAX_MSG_SIZE)
return -EINVAL;
/* Overflow check
sum must be greater (or equal) than the largest operand */
resp_sumlen = CEIL4(xcRB->reply_control_blk_length) +
xcRB->reply_data_length;
if ((CEIL4(xcRB->reply_control_blk_length) <= xcRB->reply_data_length) ?
(resp_sumlen < xcRB->reply_data_length) :
(resp_sumlen < CEIL4(xcRB->reply_control_blk_length))) {
return -EINVAL;
}
/* prepare type6 header */
msg->hdr = static_type6_hdrX;
memcpy(msg->hdr.agent_id , &(xcRB->agent_ID), sizeof(xcRB->agent_ID));
msg->hdr.ToCardLen1 = xcRB->request_control_blk_length;
if (xcRB->request_data_length) {
msg->hdr.offset2 = msg->hdr.offset1 + rcblen;
msg->hdr.ToCardLen2 = xcRB->request_data_length;
}
msg->hdr.FromCardLen1 = xcRB->reply_control_blk_length;
msg->hdr.FromCardLen2 = xcRB->reply_data_length;
/* prepare CPRB */
if (copy_from_user(&(msg->cprbx), xcRB->request_control_blk_addr,
xcRB->request_control_blk_length))
return -EFAULT;
if (msg->cprbx.cprb_len + sizeof(msg->hdr.function_code) >
xcRB->request_control_blk_length)
return -EINVAL;
function_code = ((unsigned char *)&msg->cprbx) + msg->cprbx.cprb_len;
memcpy(msg->hdr.function_code, function_code,
sizeof(msg->hdr.function_code));
if (memcmp(function_code, "US", 2) == 0)
ap_msg->special = 1;
else
ap_msg->special = 0;
/* copy data block */
if (xcRB->request_data_length &&
copy_from_user(req_data, xcRB->request_data_address,
xcRB->request_data_length))
return -EFAULT;
return 0;
}
static int xcrb_msg_to_type6_ep11cprb_msgx(struct zcrypt_device *zdev,
struct ap_message *ap_msg,
struct ep11_urb *xcRB)
{
unsigned int lfmt;
static struct type6_hdr static_type6_ep11_hdr = {
.type = 0x06,
.rqid = {0x00, 0x01},
.function_code = {0x00, 0x00},
.agent_id[0] = 0x58, /* {'X'} */
.agent_id[1] = 0x43, /* {'C'} */
.offset1 = 0x00000058,
};
struct {
struct type6_hdr hdr;
struct ep11_cprb cprbx;
unsigned char pld_tag; /* fixed value 0x30 */
unsigned char pld_lenfmt; /* payload length format */
} __packed * msg = ap_msg->message;
struct pld_hdr {
unsigned char func_tag; /* fixed value 0x4 */
unsigned char func_len; /* fixed value 0x4 */
unsigned int func_val; /* function ID */
unsigned char dom_tag; /* fixed value 0x4 */
unsigned char dom_len; /* fixed value 0x4 */
unsigned int dom_val; /* domain id */
} __packed * payload_hdr;
if (CEIL4(xcRB->req_len) < xcRB->req_len)
return -EINVAL; /* overflow after alignment*/
/* length checks */
ap_msg->length = sizeof(struct type6_hdr) + xcRB->req_len;
if (CEIL4(xcRB->req_len) > MSGTYPE06_MAX_MSG_SIZE -
(sizeof(struct type6_hdr)))
return -EINVAL;
if (CEIL4(xcRB->resp_len) < xcRB->resp_len)
return -EINVAL; /* overflow after alignment*/
if (CEIL4(xcRB->resp_len) > MSGTYPE06_MAX_MSG_SIZE -
(sizeof(struct type86_fmt2_msg)))
return -EINVAL;
/* prepare type6 header */
msg->hdr = static_type6_ep11_hdr;
msg->hdr.ToCardLen1 = xcRB->req_len;
msg->hdr.FromCardLen1 = xcRB->resp_len;
/* Import CPRB data from the ioctl input parameter */
if (copy_from_user(&(msg->cprbx.cprb_len),
(char __force __user *)xcRB->req, xcRB->req_len)) {
return -EFAULT;
}
/*
The target domain field within the cprb body/payload block will be
replaced by the usage domain for non-management commands only.
Therefore we check the first bit of the 'flags' parameter for
management command indication.
0 - non management command
1 - management command
*/
if (!((msg->cprbx.flags & 0x80) == 0x80)) {
msg->cprbx.target_id = (unsigned int)
AP_QID_QUEUE(zdev->ap_dev->qid);
if ((msg->pld_lenfmt & 0x80) == 0x80) { /*ext.len.fmt 2 or 3*/
switch (msg->pld_lenfmt & 0x03) {
case 1:
lfmt = 2;
break;
case 2:
lfmt = 3;
break;
default:
return -EINVAL;
}
} else {
lfmt = 1; /* length format #1 */
}
payload_hdr = (struct pld_hdr *)((&(msg->pld_lenfmt))+lfmt);
payload_hdr->dom_val = (unsigned int)
AP_QID_QUEUE(zdev->ap_dev->qid);
}
return 0;
}
/**
* Copy results from a type 86 ICA reply message back to user space.
*
* @zdev: crypto device pointer
* @reply: reply AP message.
* @data: pointer to user output data
* @length: size of user output data
*
* Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
*/
struct type86x_reply {
struct type86_hdr hdr;
struct type86_fmt2_ext fmt2;
struct CPRBX cprbx;
unsigned char pad[4]; /* 4 byte function code/rules block ? */
unsigned short length;
char text[0];
} __packed;
struct type86_ep11_reply {
struct type86_hdr hdr;
struct type86_fmt2_ext fmt2;
struct ep11_cprb cprbx;
} __packed;
static int convert_type86_ica(struct zcrypt_device *zdev,
struct ap_message *reply,
char __user *outputdata,
unsigned int outputdatalength)
{
static unsigned char static_pad[] = {
0x00, 0x02,
0x1B, 0x7B, 0x5D, 0xB5, 0x75, 0x01, 0x3D, 0xFD,
0x8D, 0xD1, 0xC7, 0x03, 0x2D, 0x09, 0x23, 0x57,
0x89, 0x49, 0xB9, 0x3F, 0xBB, 0x99, 0x41, 0x5B,
0x75, 0x21, 0x7B, 0x9D, 0x3B, 0x6B, 0x51, 0x39,
0xBB, 0x0D, 0x35, 0xB9, 0x89, 0x0F, 0x93, 0xA5,
0x0B, 0x47, 0xF1, 0xD3, 0xBB, 0xCB, 0xF1, 0x9D,
0x23, 0x73, 0x71, 0xFF, 0xF3, 0xF5, 0x45, 0xFB,
0x61, 0x29, 0x23, 0xFD, 0xF1, 0x29, 0x3F, 0x7F,
0x17, 0xB7, 0x1B, 0xA9, 0x19, 0xBD, 0x57, 0xA9,
0xD7, 0x95, 0xA3, 0xCB, 0xED, 0x1D, 0xDB, 0x45,
0x7D, 0x11, 0xD1, 0x51, 0x1B, 0xED, 0x71, 0xE9,
0xB1, 0xD1, 0xAB, 0xAB, 0x21, 0x2B, 0x1B, 0x9F,
0x3B, 0x9F, 0xF7, 0xF7, 0xBD, 0x63, 0xEB, 0xAD,
0xDF, 0xB3, 0x6F, 0x5B, 0xDB, 0x8D, 0xA9, 0x5D,
0xE3, 0x7D, 0x77, 0x49, 0x47, 0xF5, 0xA7, 0xFD,
0xAB, 0x2F, 0x27, 0x35, 0x77, 0xD3, 0x49, 0xC9,
0x09, 0xEB, 0xB1, 0xF9, 0xBF, 0x4B, 0xCB, 0x2B,
0xEB, 0xEB, 0x05, 0xFF, 0x7D, 0xC7, 0x91, 0x8B,
0x09, 0x83, 0xB9, 0xB9, 0x69, 0x33, 0x39, 0x6B,
0x79, 0x75, 0x19, 0xBF, 0xBB, 0x07, 0x1D, 0xBD,
0x29, 0xBF, 0x39, 0x95, 0x93, 0x1D, 0x35, 0xC7,
0xC9, 0x4D, 0xE5, 0x97, 0x0B, 0x43, 0x9B, 0xF1,
0x16, 0x93, 0x03, 0x1F, 0xA5, 0xFB, 0xDB, 0xF3,
0x27, 0x4F, 0x27, 0x61, 0x05, 0x1F, 0xB9, 0x23,
0x2F, 0xC3, 0x81, 0xA9, 0x23, 0x71, 0x55, 0x55,
0xEB, 0xED, 0x41, 0xE5, 0xF3, 0x11, 0xF1, 0x43,
0x69, 0x03, 0xBD, 0x0B, 0x37, 0x0F, 0x51, 0x8F,
0x0B, 0xB5, 0x89, 0x5B, 0x67, 0xA9, 0xD9, 0x4F,
0x01, 0xF9, 0x21, 0x77, 0x37, 0x73, 0x79, 0xC5,
0x7F, 0x51, 0xC1, 0xCF, 0x97, 0xA1, 0x75, 0xAD,
0x35, 0x9D, 0xD3, 0xD3, 0xA7, 0x9D, 0x5D, 0x41,
0x6F, 0x65, 0x1B, 0xCF, 0xA9, 0x87, 0x91, 0x09
};
struct type86x_reply *msg = reply->message;
unsigned short service_rc, service_rs;
unsigned int reply_len, pad_len;
char *data;
service_rc = msg->cprbx.ccp_rtcode;
if (unlikely(service_rc != 0)) {
service_rs = msg->cprbx.ccp_rscode;
if (service_rc == 8 && service_rs == 66)
return -EINVAL;
if (service_rc == 8 && service_rs == 65)
return -EINVAL;
if (service_rc == 8 && service_rs == 770)
return -EINVAL;
if (service_rc == 8 && service_rs == 783) {
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
return -EAGAIN;
}
if (service_rc == 12 && service_rs == 769)
return -EINVAL;
if (service_rc == 8 && service_rs == 72)
return -EINVAL;
zdev->online = 0;
pr_err("Cryptographic device %x failed and was set offline\n",
AP_QID_DEVICE(zdev->ap_dev->qid));
ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%drc%d",
AP_QID_DEVICE(zdev->ap_dev->qid), zdev->online,
msg->hdr.reply_code);
return -EAGAIN; /* repeat the request on a different device. */
}
data = msg->text;
reply_len = msg->length - 2;
if (reply_len > outputdatalength)
return -EINVAL;
/*
* For all encipher requests, the length of the ciphertext (reply_len)
* will always equal the modulus length. For MEX decipher requests
* the output needs to get padded. Minimum pad size is 10.
*
* Currently, the cases where padding will be added is for:
* - PCIXCC_MCL2 using a CRT form token (since PKD didn't support
* ZERO-PAD and CRT is only supported for PKD requests)
* - PCICC, always
*/
pad_len = outputdatalength - reply_len;
if (pad_len > 0) {
if (pad_len < 10)
return -EINVAL;
/* 'restore' padding left in the PCICC/PCIXCC card. */
if (copy_to_user(outputdata, static_pad, pad_len - 1))
return -EFAULT;
if (put_user(0, outputdata + pad_len - 1))
return -EFAULT;
}
/* Copy the crypto response to user space. */
if (copy_to_user(outputdata + pad_len, data, reply_len))
return -EFAULT;
return 0;
}
/**
* Copy results from a type 86 XCRB reply message back to user space.
*
* @zdev: crypto device pointer
* @reply: reply AP message.
* @xcRB: pointer to XCRB
*
* Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
*/
static int convert_type86_xcrb(struct zcrypt_device *zdev,
struct ap_message *reply,
struct ica_xcRB *xcRB)
{
struct type86_fmt2_msg *msg = reply->message;
char *data = reply->message;
/* Copy CPRB to user */
if (copy_to_user(xcRB->reply_control_blk_addr,
data + msg->fmt2.offset1, msg->fmt2.count1))
return -EFAULT;
xcRB->reply_control_blk_length = msg->fmt2.count1;
/* Copy data buffer to user */
if (msg->fmt2.count2)
if (copy_to_user(xcRB->reply_data_addr,
data + msg->fmt2.offset2, msg->fmt2.count2))
return -EFAULT;
xcRB->reply_data_length = msg->fmt2.count2;
return 0;
}
/**
* Copy results from a type 86 EP11 XCRB reply message back to user space.
*
* @zdev: crypto device pointer
* @reply: reply AP message.
* @xcRB: pointer to EP11 user request block
*
* Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
*/
static int convert_type86_ep11_xcrb(struct zcrypt_device *zdev,
struct ap_message *reply,
struct ep11_urb *xcRB)
{
struct type86_fmt2_msg *msg = reply->message;
char *data = reply->message;
if (xcRB->resp_len < msg->fmt2.count1)
return -EINVAL;
/* Copy response CPRB to user */
if (copy_to_user((char __force __user *)xcRB->resp,
data + msg->fmt2.offset1, msg->fmt2.count1))
return -EFAULT;
xcRB->resp_len = msg->fmt2.count1;
return 0;
}
static int convert_type86_rng(struct zcrypt_device *zdev,
struct ap_message *reply,
char *buffer)
{
struct {
struct type86_hdr hdr;
struct type86_fmt2_ext fmt2;
struct CPRBX cprbx;
} __packed * msg = reply->message;
char *data = reply->message;
if (msg->cprbx.ccp_rtcode != 0 || msg->cprbx.ccp_rscode != 0)
return -EINVAL;
memcpy(buffer, data + msg->fmt2.offset2, msg->fmt2.count2);
return msg->fmt2.count2;
}
static int convert_response_ica(struct zcrypt_device *zdev,
struct ap_message *reply,
char __user *outputdata,
unsigned int outputdatalength)
{
struct type86x_reply *msg = reply->message;
/* Response type byte is the second byte in the response. */
switch (((unsigned char *) reply->message)[1]) {
case TYPE82_RSP_CODE:
case TYPE88_RSP_CODE:
return convert_error(zdev, reply);
case TYPE86_RSP_CODE:
if (msg->cprbx.ccp_rtcode &&
(msg->cprbx.ccp_rscode == 0x14f) &&
(outputdatalength > 256)) {
if (zdev->max_exp_bit_length <= 17) {
zdev->max_exp_bit_length = 17;
return -EAGAIN;
} else
return -EINVAL;
}
if (msg->hdr.reply_code)
return convert_error(zdev, reply);
if (msg->cprbx.cprb_ver_id == 0x02)
return convert_type86_ica(zdev, reply,
outputdata, outputdatalength);
/* Fall through, no break, incorrect cprb version is an unknown
* response */
default: /* Unknown response type, this should NEVER EVER happen */
zdev->online = 0;
pr_err("Cryptographic device %x failed and was set offline\n",
AP_QID_DEVICE(zdev->ap_dev->qid));
ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%dfail",
AP_QID_DEVICE(zdev->ap_dev->qid), zdev->online);
return -EAGAIN; /* repeat the request on a different device. */
}
}
static int convert_response_xcrb(struct zcrypt_device *zdev,
struct ap_message *reply,
struct ica_xcRB *xcRB)
{
struct type86x_reply *msg = reply->message;
/* Response type byte is the second byte in the response. */
switch (((unsigned char *) reply->message)[1]) {
case TYPE82_RSP_CODE:
case TYPE88_RSP_CODE:
xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
return convert_error(zdev, reply);
case TYPE86_RSP_CODE:
if (msg->hdr.reply_code) {
memcpy(&(xcRB->status), msg->fmt2.apfs, sizeof(u32));
return convert_error(zdev, reply);
}
if (msg->cprbx.cprb_ver_id == 0x02)
return convert_type86_xcrb(zdev, reply, xcRB);
/* Fall through, no break, incorrect cprb version is an unknown
* response */
default: /* Unknown response type, this should NEVER EVER happen */
xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
zdev->online = 0;
pr_err("Cryptographic device %x failed and was set offline\n",
AP_QID_DEVICE(zdev->ap_dev->qid));
ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%dfail",
AP_QID_DEVICE(zdev->ap_dev->qid), zdev->online);
return -EAGAIN; /* repeat the request on a different device. */
}
}
static int convert_response_ep11_xcrb(struct zcrypt_device *zdev,
struct ap_message *reply, struct ep11_urb *xcRB)
{
struct type86_ep11_reply *msg = reply->message;
/* Response type byte is the second byte in the response. */
switch (((unsigned char *)reply->message)[1]) {
case TYPE82_RSP_CODE:
case TYPE87_RSP_CODE:
return convert_error(zdev, reply);
case TYPE86_RSP_CODE:
if (msg->hdr.reply_code)
return convert_error(zdev, reply);
if (msg->cprbx.cprb_ver_id == 0x04)
return convert_type86_ep11_xcrb(zdev, reply, xcRB);
/* Fall through, no break, incorrect cprb version is an unknown resp.*/
default: /* Unknown response type, this should NEVER EVER happen */
zdev->online = 0;
pr_err("Cryptographic device %x failed and was set offline\n",
AP_QID_DEVICE(zdev->ap_dev->qid));
ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%dfail",
AP_QID_DEVICE(zdev->ap_dev->qid), zdev->online);
return -EAGAIN; /* repeat the request on a different device. */
}
}
static int convert_response_rng(struct zcrypt_device *zdev,
struct ap_message *reply,
char *data)
{
struct type86x_reply *msg = reply->message;
switch (msg->hdr.type) {
case TYPE82_RSP_CODE:
case TYPE88_RSP_CODE:
return -EINVAL;
case TYPE86_RSP_CODE:
if (msg->hdr.reply_code)
return -EINVAL;
if (msg->cprbx.cprb_ver_id == 0x02)
return convert_type86_rng(zdev, reply, data);
/* Fall through, no break, incorrect cprb version is an unknown
* response */
default: /* Unknown response type, this should NEVER EVER happen */
zdev->online = 0;
pr_err("Cryptographic device %x failed and was set offline\n",
AP_QID_DEVICE(zdev->ap_dev->qid));
ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%dfail",
AP_QID_DEVICE(zdev->ap_dev->qid), zdev->online);
return -EAGAIN; /* repeat the request on a different device. */
}
}
/**
* This function is called from the AP bus code after a crypto request
* "msg" has finished with the reply message "reply".
* It is called from tasklet context.
* @ap_dev: pointer to the AP device
* @msg: pointer to the AP message
* @reply: pointer to the AP reply message
*/
static void zcrypt_msgtype6_receive(struct ap_device *ap_dev,
struct ap_message *msg,
struct ap_message *reply)
{
static struct error_hdr error_reply = {
.type = TYPE82_RSP_CODE,
.reply_code = REP82_ERROR_MACHINE_FAILURE,
};
struct response_type *resp_type =
(struct response_type *) msg->private;
struct type86x_reply *t86r;
int length;
/* Copy the reply message to the request message buffer. */
if (!reply)
goto out; /* ap_msg->rc indicates the error */
t86r = reply->message;
if (t86r->hdr.type == TYPE86_RSP_CODE &&
t86r->cprbx.cprb_ver_id == 0x02) {
switch (resp_type->type) {
case PCIXCC_RESPONSE_TYPE_ICA:
length = sizeof(struct type86x_reply)
+ t86r->length - 2;
length = min(PCIXCC_MAX_ICA_RESPONSE_SIZE, length);
memcpy(msg->message, reply->message, length);
break;
case PCIXCC_RESPONSE_TYPE_XCRB:
length = t86r->fmt2.offset2 + t86r->fmt2.count2;
length = min(MSGTYPE06_MAX_MSG_SIZE, length);
memcpy(msg->message, reply->message, length);
break;
default:
memcpy(msg->message, &error_reply,
sizeof(error_reply));
}
} else
memcpy(msg->message, reply->message, sizeof(error_reply));
out:
complete(&(resp_type->work));
}
/**
* This function is called from the AP bus code after a crypto request
* "msg" has finished with the reply message "reply".
* It is called from tasklet context.
* @ap_dev: pointer to the AP device
* @msg: pointer to the AP message
* @reply: pointer to the AP reply message
*/
static void zcrypt_msgtype6_receive_ep11(struct ap_device *ap_dev,
struct ap_message *msg,
struct ap_message *reply)
{
static struct error_hdr error_reply = {
.type = TYPE82_RSP_CODE,
.reply_code = REP82_ERROR_MACHINE_FAILURE,
};
struct response_type *resp_type =
(struct response_type *)msg->private;
struct type86_ep11_reply *t86r;
int length;
/* Copy the reply message to the request message buffer. */
if (!reply)
goto out; /* ap_msg->rc indicates the error */
t86r = reply->message;
if (t86r->hdr.type == TYPE86_RSP_CODE &&
t86r->cprbx.cprb_ver_id == 0x04) {
switch (resp_type->type) {
case PCIXCC_RESPONSE_TYPE_EP11:
length = t86r->fmt2.offset1 + t86r->fmt2.count1;
length = min(MSGTYPE06_MAX_MSG_SIZE, length);
memcpy(msg->message, reply->message, length);
break;
default:
memcpy(msg->message, &error_reply, sizeof(error_reply));
}
} else {
memcpy(msg->message, reply->message, sizeof(error_reply));
}
out:
complete(&(resp_type->work));
}
static atomic_t zcrypt_step = ATOMIC_INIT(0);
/**
* The request distributor calls this function if it picked the PCIXCC/CEX2C
* device to handle a modexpo request.
* @zdev: pointer to zcrypt_device structure that identifies the
* PCIXCC/CEX2C device to the request distributor
* @mex: pointer to the modexpo request buffer
*/
static long zcrypt_msgtype6_modexpo(struct zcrypt_device *zdev,
struct ica_rsa_modexpo *mex)
{
struct ap_message ap_msg;
struct response_type resp_type = {
.type = PCIXCC_RESPONSE_TYPE_ICA,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.receive = zcrypt_msgtype6_receive;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
atomic_inc_return(&zcrypt_step);
ap_msg.private = &resp_type;
rc = ICAMEX_msg_to_type6MEX_msgX(zdev, &ap_msg, mex);
if (rc)
goto out_free;
init_completion(&resp_type.work);
ap_queue_message(zdev->ap_dev, &ap_msg);
rc = wait_for_completion_interruptible(&resp_type.work);
if (rc == 0) {
rc = ap_msg.rc;
if (rc == 0)
rc = convert_response_ica(zdev, &ap_msg,
mex->outputdata,
mex->outputdatalength);
} else
/* Signal pending. */
ap_cancel_message(zdev->ap_dev, &ap_msg);
out_free:
free_page((unsigned long) ap_msg.message);
return rc;
}
/**
* The request distributor calls this function if it picked the PCIXCC/CEX2C
* device to handle a modexpo_crt request.
* @zdev: pointer to zcrypt_device structure that identifies the
* PCIXCC/CEX2C device to the request distributor
* @crt: pointer to the modexpoc_crt request buffer
*/
static long zcrypt_msgtype6_modexpo_crt(struct zcrypt_device *zdev,
struct ica_rsa_modexpo_crt *crt)
{
struct ap_message ap_msg;
struct response_type resp_type = {
.type = PCIXCC_RESPONSE_TYPE_ICA,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.receive = zcrypt_msgtype6_receive;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
atomic_inc_return(&zcrypt_step);
ap_msg.private = &resp_type;
rc = ICACRT_msg_to_type6CRT_msgX(zdev, &ap_msg, crt);
if (rc)
goto out_free;
init_completion(&resp_type.work);
ap_queue_message(zdev->ap_dev, &ap_msg);
rc = wait_for_completion_interruptible(&resp_type.work);
if (rc == 0) {
rc = ap_msg.rc;
if (rc == 0)
rc = convert_response_ica(zdev, &ap_msg,
crt->outputdata,
crt->outputdatalength);
} else
/* Signal pending. */
ap_cancel_message(zdev->ap_dev, &ap_msg);
out_free:
free_page((unsigned long) ap_msg.message);
return rc;
}
/**
* The request distributor calls this function if it picked the PCIXCC/CEX2C
* device to handle a send_cprb request.
* @zdev: pointer to zcrypt_device structure that identifies the
* PCIXCC/CEX2C device to the request distributor
* @xcRB: pointer to the send_cprb request buffer
*/
static long zcrypt_msgtype6_send_cprb(struct zcrypt_device *zdev,
struct ica_xcRB *xcRB)
{
struct ap_message ap_msg;
struct response_type resp_type = {
.type = PCIXCC_RESPONSE_TYPE_XCRB,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(MSGTYPE06_MAX_MSG_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.receive = zcrypt_msgtype6_receive;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
atomic_inc_return(&zcrypt_step);
ap_msg.private = &resp_type;
rc = XCRB_msg_to_type6CPRB_msgX(zdev, &ap_msg, xcRB);
if (rc)
goto out_free;
init_completion(&resp_type.work);
ap_queue_message(zdev->ap_dev, &ap_msg);
rc = wait_for_completion_interruptible(&resp_type.work);
if (rc == 0) {
rc = ap_msg.rc;
if (rc == 0)
rc = convert_response_xcrb(zdev, &ap_msg, xcRB);
} else
/* Signal pending. */
ap_cancel_message(zdev->ap_dev, &ap_msg);
out_free:
kzfree(ap_msg.message);
return rc;
}
/**
* The request distributor calls this function if it picked the CEX4P
* device to handle a send_ep11_cprb request.
* @zdev: pointer to zcrypt_device structure that identifies the
* CEX4P device to the request distributor
* @xcRB: pointer to the ep11 user request block
*/
static long zcrypt_msgtype6_send_ep11_cprb(struct zcrypt_device *zdev,
struct ep11_urb *xcrb)
{
struct ap_message ap_msg;
struct response_type resp_type = {
.type = PCIXCC_RESPONSE_TYPE_EP11,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(MSGTYPE06_MAX_MSG_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.receive = zcrypt_msgtype6_receive_ep11;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
atomic_inc_return(&zcrypt_step);
ap_msg.private = &resp_type;
rc = xcrb_msg_to_type6_ep11cprb_msgx(zdev, &ap_msg, xcrb);
if (rc)
goto out_free;
init_completion(&resp_type.work);
ap_queue_message(zdev->ap_dev, &ap_msg);
rc = wait_for_completion_interruptible(&resp_type.work);
if (rc == 0) {
rc = ap_msg.rc;
if (rc == 0)
rc = convert_response_ep11_xcrb(zdev, &ap_msg, xcrb);
} else
/* Signal pending. */
ap_cancel_message(zdev->ap_dev, &ap_msg);
out_free:
kzfree(ap_msg.message);
return rc;
}
/**
* The request distributor calls this function if it picked the PCIXCC/CEX2C
* device to generate random data.
* @zdev: pointer to zcrypt_device structure that identifies the
* PCIXCC/CEX2C device to the request distributor
* @buffer: pointer to a memory page to return random data
*/
static long zcrypt_msgtype6_rng(struct zcrypt_device *zdev,
char *buffer)
{
struct ap_message ap_msg;
struct response_type resp_type = {
.type = PCIXCC_RESPONSE_TYPE_XCRB,
};
int rc;
ap_init_message(&ap_msg);
ap_msg.message = kmalloc(MSGTYPE06_MAX_MSG_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
ap_msg.receive = zcrypt_msgtype6_receive;
ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
atomic_inc_return(&zcrypt_step);
ap_msg.private = &resp_type;
rng_type6CPRB_msgX(zdev->ap_dev, &ap_msg, ZCRYPT_RNG_BUFFER_SIZE);
init_completion(&resp_type.work);
ap_queue_message(zdev->ap_dev, &ap_msg);
rc = wait_for_completion_interruptible(&resp_type.work);
if (rc == 0) {
rc = ap_msg.rc;
if (rc == 0)
rc = convert_response_rng(zdev, &ap_msg, buffer);
} else
/* Signal pending. */
ap_cancel_message(zdev->ap_dev, &ap_msg);
kfree(ap_msg.message);
return rc;
}
/**
* The crypto operations for a PCIXCC/CEX2C card.
*/
static struct zcrypt_ops zcrypt_msgtype6_norng_ops = {
.owner = THIS_MODULE,
.name = MSGTYPE06_NAME,
.variant = MSGTYPE06_VARIANT_NORNG,
.rsa_modexpo = zcrypt_msgtype6_modexpo,
.rsa_modexpo_crt = zcrypt_msgtype6_modexpo_crt,
.send_cprb = zcrypt_msgtype6_send_cprb,
};
static struct zcrypt_ops zcrypt_msgtype6_ops = {
.owner = THIS_MODULE,
.name = MSGTYPE06_NAME,
.variant = MSGTYPE06_VARIANT_DEFAULT,
.rsa_modexpo = zcrypt_msgtype6_modexpo,
.rsa_modexpo_crt = zcrypt_msgtype6_modexpo_crt,
.send_cprb = zcrypt_msgtype6_send_cprb,
.rng = zcrypt_msgtype6_rng,
};
static struct zcrypt_ops zcrypt_msgtype6_ep11_ops = {
.owner = THIS_MODULE,
.name = MSGTYPE06_NAME,
.variant = MSGTYPE06_VARIANT_EP11,
.rsa_modexpo = NULL,
.rsa_modexpo_crt = NULL,
.send_ep11_cprb = zcrypt_msgtype6_send_ep11_cprb,
};
int __init zcrypt_msgtype6_init(void)
{
zcrypt_msgtype_register(&zcrypt_msgtype6_norng_ops);
zcrypt_msgtype_register(&zcrypt_msgtype6_ops);
zcrypt_msgtype_register(&zcrypt_msgtype6_ep11_ops);
return 0;
}
void __exit zcrypt_msgtype6_exit(void)
{
zcrypt_msgtype_unregister(&zcrypt_msgtype6_norng_ops);
zcrypt_msgtype_unregister(&zcrypt_msgtype6_ops);
zcrypt_msgtype_unregister(&zcrypt_msgtype6_ep11_ops);
}
module_init(zcrypt_msgtype6_init);
module_exit(zcrypt_msgtype6_exit);