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linux-pinenote/drivers/s390/crypto/zcrypt_pcixcc.c
Holger Dengler 2389aef47e [S390] zcrypt: Fix error return codes. 
Return EINVAL instead of EFAULT for invalid input parameter.

Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27 11:27:13 +01:00

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33 KiB
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/*
* linux/drivers/s390/crypto/zcrypt_pcixcc.c
*
* zcrypt 2.1.0
*
* Copyright (C) 2001, 2006 IBM Corporation
* 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>
*
* 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.
*/
#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 <asm/uaccess.h>
#include "ap_bus.h"
#include "zcrypt_api.h"
#include "zcrypt_error.h"
#include "zcrypt_pcicc.h"
#include "zcrypt_pcixcc.h"
#include "zcrypt_cca_key.h"
#define PCIXCC_MIN_MOD_SIZE 16 /* 128 bits */
#define PCIXCC_MIN_MOD_SIZE_OLD 64 /* 512 bits */
#define PCIXCC_MAX_MOD_SIZE 256 /* 2048 bits */
#define CEX3C_MIN_MOD_SIZE PCIXCC_MIN_MOD_SIZE
#define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */
#define PCIXCC_MCL2_SPEED_RATING 7870
#define PCIXCC_MCL3_SPEED_RATING 7870
#define CEX2C_SPEED_RATING 7000
#define CEX3C_SPEED_RATING 6500
#define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c /* max size type6 v2 crt message */
#define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply */
#define PCIXCC_MAX_XCRB_MESSAGE_SIZE (12*1024)
#define PCIXCC_CLEANUP_TIME (15*HZ)
#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
static struct ap_device_id zcrypt_pcixcc_ids[] = {
{ AP_DEVICE(AP_DEVICE_TYPE_PCIXCC) },
{ AP_DEVICE(AP_DEVICE_TYPE_CEX2C) },
{ AP_DEVICE(AP_DEVICE_TYPE_CEX3C) },
{ /* end of list */ },
};
#ifndef CONFIG_ZCRYPT_MONOLITHIC
MODULE_DEVICE_TABLE(ap, zcrypt_pcixcc_ids);
MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("PCIXCC Cryptographic Coprocessor device driver, "
"Copyright 2001, 2006 IBM Corporation");
MODULE_LICENSE("GPL");
#endif
static int zcrypt_pcixcc_probe(struct ap_device *ap_dev);
static void zcrypt_pcixcc_remove(struct ap_device *ap_dev);
static void zcrypt_pcixcc_receive(struct ap_device *, struct ap_message *,
struct ap_message *);
static struct ap_driver zcrypt_pcixcc_driver = {
.probe = zcrypt_pcixcc_probe,
.remove = zcrypt_pcixcc_remove,
.receive = zcrypt_pcixcc_receive,
.ids = zcrypt_pcixcc_ids,
.request_timeout = PCIXCC_CLEANUP_TIME,
};
/**
* 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];
} __attribute__((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];
} __attribute__((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;
} __attribute__((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;
} __attribute__((packed)) *msg = ap_msg->message;
int rcblen = CEIL4(xcRB->request_control_blk_length);
int replylen;
char *req_data = ap_msg->message + sizeof(struct type6_hdr) + rcblen;
char *function_code;
/* length checks */
ap_msg->length = sizeof(struct type6_hdr) +
CEIL4(xcRB->request_control_blk_length) +
xcRB->request_data_length;
if (ap_msg->length > PCIXCC_MAX_XCRB_MESSAGE_SIZE)
return -EINVAL;
replylen = sizeof(struct type86_fmt2_msg) +
CEIL4(xcRB->reply_control_blk_length) +
xcRB->reply_data_length;
if (replylen > PCIXCC_MAX_XCRB_MESSAGE_SIZE)
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;
}
/**
* Prepare a type6 CPRB message for random number generation
*
* @ap_dev: AP device pointer
* @ap_msg: pointer to AP message
*/
static void rng_type6CPRB_msgX(struct ap_device *ap_dev,
struct ap_message *ap_msg,
unsigned random_number_length)
{
struct {
struct type6_hdr hdr;
struct CPRBX cprbx;
char function_code[2];
short int rule_length;
char rule[8];
short int verb_length;
short int key_length;
} __attribute__((packed)) *msg = ap_msg->message;
static struct type6_hdr static_type6_hdrX = {
.type = 0x06,
.offset1 = 0x00000058,
.agent_id = {'C', 'A'},
.function_code = {'R', 'L'},
.ToCardLen1 = sizeof *msg - sizeof(msg->hdr),
.FromCardLen1 = sizeof *msg - sizeof(msg->hdr),
};
static struct CPRBX local_cprbx = {
.cprb_len = 0x00dc,
.cprb_ver_id = 0x02,
.func_id = {0x54, 0x32},
.req_parml = sizeof *msg - sizeof(msg->hdr) -
sizeof(msg->cprbx),
.rpl_msgbl = sizeof *msg - sizeof(msg->hdr),
};
msg->hdr = static_type6_hdrX;
msg->hdr.FromCardLen2 = random_number_length,
msg->cprbx = local_cprbx;
msg->cprbx.rpl_datal = random_number_length,
msg->cprbx.domain = AP_QID_QUEUE(ap_dev->qid);
memcpy(msg->function_code, msg->hdr.function_code, 0x02);
msg->rule_length = 0x0a;
memcpy(msg->rule, "RANDOM ", 8);
msg->verb_length = 0x02;
msg->key_length = 0x02;
ap_msg->length = sizeof *msg;
}
/**
* 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];
} __attribute__((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;
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;
}
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;
} __attribute__((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;
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;
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;
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_pcixcc_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 (IS_ERR(reply)) {
memcpy(msg->message, &error_reply, sizeof(error_reply));
goto out;
}
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(PCIXCC_MAX_XCRB_MESSAGE_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_pcixcc_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.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 = 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_pcixcc_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.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 = 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_pcixcc_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(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
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 = 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 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_pcixcc_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(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
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 = 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_pcixcc_ops = {
.rsa_modexpo = zcrypt_pcixcc_modexpo,
.rsa_modexpo_crt = zcrypt_pcixcc_modexpo_crt,
.send_cprb = zcrypt_pcixcc_send_cprb,
};
static struct zcrypt_ops zcrypt_pcixcc_with_rng_ops = {
.rsa_modexpo = zcrypt_pcixcc_modexpo,
.rsa_modexpo_crt = zcrypt_pcixcc_modexpo_crt,
.send_cprb = zcrypt_pcixcc_send_cprb,
.rng = zcrypt_pcixcc_rng,
};
/**
* Micro-code detection function. Its sends a message to a pcixcc card
* to find out the microcode level.
* @ap_dev: pointer to the AP device.
*/
static int zcrypt_pcixcc_mcl(struct ap_device *ap_dev)
{
static unsigned char msg[] = {
0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x43,0x41,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x00,
0x00,0x00,0x01,0xC4,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x07,0x24,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0xDC,0x02,0x00,0x00,0x00,0x54,0x32,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE8,
0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x24,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x0A,
0x4D,0x52,0x50,0x20,0x20,0x20,0x20,0x20,
0x00,0x42,0x00,0x01,0x02,0x03,0x04,0x05,
0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,
0x0E,0x0F,0x00,0x11,0x22,0x33,0x44,0x55,
0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,
0xEE,0xFF,0xFF,0xEE,0xDD,0xCC,0xBB,0xAA,
0x99,0x88,0x77,0x66,0x55,0x44,0x33,0x22,
0x11,0x00,0x01,0x23,0x45,0x67,0x89,0xAB,
0xCD,0xEF,0xFE,0xDC,0xBA,0x98,0x76,0x54,
0x32,0x10,0x00,0x9A,0x00,0x98,0x00,0x00,
0x1E,0x00,0x00,0x94,0x00,0x00,0x00,0x00,
0x04,0x00,0x00,0x8C,0x00,0x00,0x00,0x40,
0x02,0x00,0x00,0x40,0xBA,0xE8,0x23,0x3C,
0x75,0xF3,0x91,0x61,0xD6,0x73,0x39,0xCF,
0x7B,0x6D,0x8E,0x61,0x97,0x63,0x9E,0xD9,
0x60,0x55,0xD6,0xC7,0xEF,0xF8,0x1E,0x63,
0x95,0x17,0xCC,0x28,0x45,0x60,0x11,0xC5,
0xC4,0x4E,0x66,0xC6,0xE6,0xC3,0xDE,0x8A,
0x19,0x30,0xCF,0x0E,0xD7,0xAA,0xDB,0x01,
0xD8,0x00,0xBB,0x8F,0x39,0x9F,0x64,0x28,
0xF5,0x7A,0x77,0x49,0xCC,0x6B,0xA3,0x91,
0x97,0x70,0xE7,0x60,0x1E,0x39,0xE1,0xE5,
0x33,0xE1,0x15,0x63,0x69,0x08,0x80,0x4C,
0x67,0xC4,0x41,0x8F,0x48,0xDF,0x26,0x98,
0xF1,0xD5,0x8D,0x88,0xD9,0x6A,0xA4,0x96,
0xC5,0x84,0xD9,0x30,0x49,0x67,0x7D,0x19,
0xB1,0xB3,0x45,0x4D,0xB2,0x53,0x9A,0x47,
0x3C,0x7C,0x55,0xBF,0xCC,0x85,0x00,0x36,
0xF1,0x3D,0x93,0x53
};
unsigned long long psmid;
struct CPRBX *cprbx;
char *reply;
int rc, i;
reply = (void *) get_zeroed_page(GFP_KERNEL);
if (!reply)
return -ENOMEM;
rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, msg, sizeof(msg));
if (rc)
goto out_free;
/* Wait for the test message to complete. */
for (i = 0; i < 6; i++) {
mdelay(300);
rc = ap_recv(ap_dev->qid, &psmid, reply, 4096);
if (rc == 0 && psmid == 0x0102030405060708ULL)
break;
}
if (i >= 6) {
/* Got no answer. */
rc = -ENODEV;
goto out_free;
}
cprbx = (struct CPRBX *) (reply + 48);
if (cprbx->ccp_rtcode == 8 && cprbx->ccp_rscode == 33)
rc = ZCRYPT_PCIXCC_MCL2;
else
rc = ZCRYPT_PCIXCC_MCL3;
out_free:
free_page((unsigned long) reply);
return rc;
}
/**
* Large random number detection function. Its sends a message to a pcixcc
* card to find out if large random numbers are supported.
* @ap_dev: pointer to the AP device.
*
* Returns 1 if large random numbers are supported, 0 if not and < 0 on error.
*/
static int zcrypt_pcixcc_rng_supported(struct ap_device *ap_dev)
{
struct ap_message ap_msg;
unsigned long long psmid;
struct {
struct type86_hdr hdr;
struct type86_fmt2_ext fmt2;
struct CPRBX cprbx;
} __attribute__((packed)) *reply;
int rc, i;
ap_init_message(&ap_msg);
ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
if (!ap_msg.message)
return -ENOMEM;
rng_type6CPRB_msgX(ap_dev, &ap_msg, 4);
rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, ap_msg.message,
ap_msg.length);
if (rc)
goto out_free;
/* Wait for the test message to complete. */
for (i = 0; i < 2 * HZ; i++) {
msleep(1000 / HZ);
rc = ap_recv(ap_dev->qid, &psmid, ap_msg.message, 4096);
if (rc == 0 && psmid == 0x0102030405060708ULL)
break;
}
if (i >= 2 * HZ) {
/* Got no answer. */
rc = -ENODEV;
goto out_free;
}
reply = ap_msg.message;
if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
rc = 1;
else
rc = 0;
out_free:
free_page((unsigned long) ap_msg.message);
return rc;
}
/**
* Probe function for PCIXCC/CEX2C cards. It always accepts the AP device
* since the bus_match already checked the hardware type. The PCIXCC
* cards come in two flavours: micro code level 2 and micro code level 3.
* This is checked by sending a test message to the device.
* @ap_dev: pointer to the AP device.
*/
static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
{
struct zcrypt_device *zdev;
int rc = 0;
zdev = zcrypt_device_alloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE);
if (!zdev)
return -ENOMEM;
zdev->ap_dev = ap_dev;
zdev->online = 1;
switch (ap_dev->device_type) {
case AP_DEVICE_TYPE_PCIXCC:
rc = zcrypt_pcixcc_mcl(ap_dev);
if (rc < 0) {
zcrypt_device_free(zdev);
return rc;
}
zdev->user_space_type = rc;
if (rc == ZCRYPT_PCIXCC_MCL2) {
zdev->type_string = "PCIXCC_MCL2";
zdev->speed_rating = PCIXCC_MCL2_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
} else {
zdev->type_string = "PCIXCC_MCL3";
zdev->speed_rating = PCIXCC_MCL3_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
}
break;
case AP_DEVICE_TYPE_CEX2C:
zdev->user_space_type = ZCRYPT_CEX2C;
zdev->type_string = "CEX2C";
zdev->speed_rating = CEX2C_SPEED_RATING;
zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
zdev->max_exp_bit_length = PCIXCC_MAX_MOD_SIZE;
break;
case AP_DEVICE_TYPE_CEX3C:
zdev->user_space_type = ZCRYPT_CEX3C;
zdev->type_string = "CEX3C";
zdev->speed_rating = CEX3C_SPEED_RATING;
zdev->min_mod_size = CEX3C_MIN_MOD_SIZE;
zdev->max_mod_size = CEX3C_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX3C_MAX_MOD_SIZE;
break;
default:
goto out_free;
}
rc = zcrypt_pcixcc_rng_supported(ap_dev);
if (rc < 0) {
zcrypt_device_free(zdev);
return rc;
}
if (rc)
zdev->ops = &zcrypt_pcixcc_with_rng_ops;
else
zdev->ops = &zcrypt_pcixcc_ops;
ap_dev->reply = &zdev->reply;
ap_dev->private = zdev;
rc = zcrypt_device_register(zdev);
if (rc)
goto out_free;
return 0;
out_free:
ap_dev->private = NULL;
zcrypt_device_free(zdev);
return rc;
}
/**
* This is called to remove the extended PCIXCC/CEX2C driver information
* if an AP device is removed.
*/
static void zcrypt_pcixcc_remove(struct ap_device *ap_dev)
{
struct zcrypt_device *zdev = ap_dev->private;
zcrypt_device_unregister(zdev);
}
int __init zcrypt_pcixcc_init(void)
{
return ap_driver_register(&zcrypt_pcixcc_driver, THIS_MODULE, "pcixcc");
}
void zcrypt_pcixcc_exit(void)
{
ap_driver_unregister(&zcrypt_pcixcc_driver);
}
#ifndef CONFIG_ZCRYPT_MONOLITHIC
module_init(zcrypt_pcixcc_init);
module_exit(zcrypt_pcixcc_exit);
#endif
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