1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  Copyright IBM Corp. 2001, 2023
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  *				  Ralph Wuerthner <rwuerthn@de.ibm.com>
10  *  MSGTYPE restruct:		  Holger Dengler <hd@linux.vnet.ibm.com>
11  */
12 
13 #define KMSG_COMPONENT "zcrypt"
14 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
15 
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/init.h>
19 #include <linux/err.h>
20 #include <linux/atomic.h>
21 #include <linux/uaccess.h>
22 
23 #include "ap_bus.h"
24 #include "zcrypt_api.h"
25 #include "zcrypt_error.h"
26 #include "zcrypt_msgtype50.h"
27 
28 /* >= CEX3A: 4096 bits */
29 #define CEX3A_MAX_MOD_SIZE 512
30 
31 /* >= CEX3A: 512 bit modulus, (max outputdatalength) + type80_hdr */
32 #define CEX3A_MAX_RESPONSE_SIZE 0x210
33 
34 MODULE_AUTHOR("IBM Corporation");
35 MODULE_DESCRIPTION("Cryptographic Accelerator (message type 50), " \
36 		   "Copyright IBM Corp. 2001, 2023");
37 MODULE_LICENSE("GPL");
38 
39 /*
40  * The type 50 message family is associated with a CEXxA cards.
41  *
42  * The four members of the family are described below.
43  *
44  * Note that all unsigned char arrays are right-justified and left-padded
45  * with zeroes.
46  *
47  * Note that all reserved fields must be zeroes.
48  */
49 struct type50_hdr {
50 	unsigned char	reserved1;
51 	unsigned char	msg_type_code;	/* 0x50 */
52 	unsigned short	msg_len;
53 	unsigned char	reserved2;
54 	unsigned char	ignored;
55 	unsigned short	reserved3;
56 } __packed;
57 
58 #define TYPE50_TYPE_CODE	0x50
59 
60 #define TYPE50_MEB1_FMT		0x0001
61 #define TYPE50_MEB2_FMT		0x0002
62 #define TYPE50_MEB3_FMT		0x0003
63 #define TYPE50_CRB1_FMT		0x0011
64 #define TYPE50_CRB2_FMT		0x0012
65 #define TYPE50_CRB3_FMT		0x0013
66 
67 /* Mod-Exp, with a small modulus */
68 struct type50_meb1_msg {
69 	struct type50_hdr header;
70 	unsigned short	keyblock_type;	/* 0x0001 */
71 	unsigned char	reserved[6];
72 	unsigned char	exponent[128];
73 	unsigned char	modulus[128];
74 	unsigned char	message[128];
75 } __packed;
76 
77 /* Mod-Exp, with a large modulus */
78 struct type50_meb2_msg {
79 	struct type50_hdr header;
80 	unsigned short	keyblock_type;	/* 0x0002 */
81 	unsigned char	reserved[6];
82 	unsigned char	exponent[256];
83 	unsigned char	modulus[256];
84 	unsigned char	message[256];
85 } __packed;
86 
87 /* Mod-Exp, with a larger modulus */
88 struct type50_meb3_msg {
89 	struct type50_hdr header;
90 	unsigned short	keyblock_type;	/* 0x0003 */
91 	unsigned char	reserved[6];
92 	unsigned char	exponent[512];
93 	unsigned char	modulus[512];
94 	unsigned char	message[512];
95 } __packed;
96 
97 /* CRT, with a small modulus */
98 struct type50_crb1_msg {
99 	struct type50_hdr header;
100 	unsigned short	keyblock_type;	/* 0x0011 */
101 	unsigned char	reserved[6];
102 	unsigned char	p[64];
103 	unsigned char	q[64];
104 	unsigned char	dp[64];
105 	unsigned char	dq[64];
106 	unsigned char	u[64];
107 	unsigned char	message[128];
108 } __packed;
109 
110 /* CRT, with a large modulus */
111 struct type50_crb2_msg {
112 	struct type50_hdr header;
113 	unsigned short	keyblock_type;	/* 0x0012 */
114 	unsigned char	reserved[6];
115 	unsigned char	p[128];
116 	unsigned char	q[128];
117 	unsigned char	dp[128];
118 	unsigned char	dq[128];
119 	unsigned char	u[128];
120 	unsigned char	message[256];
121 } __packed;
122 
123 /* CRT, with a larger modulus */
124 struct type50_crb3_msg {
125 	struct type50_hdr header;
126 	unsigned short	keyblock_type;	/* 0x0013 */
127 	unsigned char	reserved[6];
128 	unsigned char	p[256];
129 	unsigned char	q[256];
130 	unsigned char	dp[256];
131 	unsigned char	dq[256];
132 	unsigned char	u[256];
133 	unsigned char	message[512];
134 } __packed;
135 
136 /*
137  * The type 80 response family is associated with a CEXxA cards.
138  *
139  * Note that all unsigned char arrays are right-justified and left-padded
140  * with zeroes.
141  *
142  * Note that all reserved fields must be zeroes.
143  */
144 
145 #define TYPE80_RSP_CODE 0x80
146 
147 struct type80_hdr {
148 	unsigned char	reserved1;
149 	unsigned char	type;		/* 0x80 */
150 	unsigned short	len;
151 	unsigned char	code;		/* 0x00 */
152 	unsigned char	reserved2[3];
153 	unsigned char	reserved3[8];
154 } __packed;
155 
get_rsa_modex_fc(struct ica_rsa_modexpo * mex,int * fcode)156 int get_rsa_modex_fc(struct ica_rsa_modexpo *mex, int *fcode)
157 {
158 	if (!mex->inputdatalength)
159 		return -EINVAL;
160 
161 	if (mex->inputdatalength <= 128)	/* 1024 bit */
162 		*fcode = MEX_1K;
163 	else if (mex->inputdatalength <= 256)	/* 2048 bit */
164 		*fcode = MEX_2K;
165 	else					/* 4096 bit */
166 		*fcode = MEX_4K;
167 
168 	return 0;
169 }
170 
get_rsa_crt_fc(struct ica_rsa_modexpo_crt * crt,int * fcode)171 int get_rsa_crt_fc(struct ica_rsa_modexpo_crt *crt, int *fcode)
172 {
173 	if (!crt->inputdatalength)
174 		return -EINVAL;
175 
176 	if (crt->inputdatalength <= 128)	/* 1024 bit */
177 		*fcode = CRT_1K;
178 	else if (crt->inputdatalength <= 256)	/* 2048 bit */
179 		*fcode = CRT_2K;
180 	else					/* 4096 bit */
181 		*fcode = CRT_4K;
182 
183 	return 0;
184 }
185 
186 /*
187  * Convert a ICAMEX message to a type50 MEX message.
188  *
189  * @zq: crypto queue pointer
190  * @ap_msg: crypto request pointer
191  * @mex: pointer to user input data
192  *
193  * Returns 0 on success or -EFAULT.
194  */
ICAMEX_msg_to_type50MEX_msg(struct zcrypt_queue * zq,struct ap_message * ap_msg,struct ica_rsa_modexpo * mex)195 static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_queue *zq,
196 				       struct ap_message *ap_msg,
197 				       struct ica_rsa_modexpo *mex)
198 {
199 	unsigned char *mod, *exp, *inp;
200 	int mod_len;
201 
202 	mod_len = mex->inputdatalength;
203 
204 	if (mod_len <= 128) {
205 		struct type50_meb1_msg *meb1 = ap_msg->msg;
206 
207 		memset(meb1, 0, sizeof(*meb1));
208 		ap_msg->len = sizeof(*meb1);
209 		meb1->header.msg_type_code = TYPE50_TYPE_CODE;
210 		meb1->header.msg_len = sizeof(*meb1);
211 		meb1->keyblock_type = TYPE50_MEB1_FMT;
212 		mod = meb1->modulus + sizeof(meb1->modulus) - mod_len;
213 		exp = meb1->exponent + sizeof(meb1->exponent) - mod_len;
214 		inp = meb1->message + sizeof(meb1->message) - mod_len;
215 	} else if (mod_len <= 256) {
216 		struct type50_meb2_msg *meb2 = ap_msg->msg;
217 
218 		memset(meb2, 0, sizeof(*meb2));
219 		ap_msg->len = sizeof(*meb2);
220 		meb2->header.msg_type_code = TYPE50_TYPE_CODE;
221 		meb2->header.msg_len = sizeof(*meb2);
222 		meb2->keyblock_type = TYPE50_MEB2_FMT;
223 		mod = meb2->modulus + sizeof(meb2->modulus) - mod_len;
224 		exp = meb2->exponent + sizeof(meb2->exponent) - mod_len;
225 		inp = meb2->message + sizeof(meb2->message) - mod_len;
226 	} else if (mod_len <= 512) {
227 		struct type50_meb3_msg *meb3 = ap_msg->msg;
228 
229 		memset(meb3, 0, sizeof(*meb3));
230 		ap_msg->len = sizeof(*meb3);
231 		meb3->header.msg_type_code = TYPE50_TYPE_CODE;
232 		meb3->header.msg_len = sizeof(*meb3);
233 		meb3->keyblock_type = TYPE50_MEB3_FMT;
234 		mod = meb3->modulus + sizeof(meb3->modulus) - mod_len;
235 		exp = meb3->exponent + sizeof(meb3->exponent) - mod_len;
236 		inp = meb3->message + sizeof(meb3->message) - mod_len;
237 	} else {
238 		return -EINVAL;
239 	}
240 
241 	if (copy_from_user(mod, mex->n_modulus, mod_len) ||
242 	    copy_from_user(exp, mex->b_key, mod_len) ||
243 	    copy_from_user(inp, mex->inputdata, mod_len))
244 		return -EFAULT;
245 
246 	return 0;
247 }
248 
249 /*
250  * Convert a ICACRT message to a type50 CRT message.
251  *
252  * @zq: crypto queue pointer
253  * @ap_msg: crypto request pointer
254  * @crt: pointer to user input data
255  *
256  * Returns 0 on success or -EFAULT.
257  */
ICACRT_msg_to_type50CRT_msg(struct zcrypt_queue * zq,struct ap_message * ap_msg,struct ica_rsa_modexpo_crt * crt)258 static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_queue *zq,
259 				       struct ap_message *ap_msg,
260 				       struct ica_rsa_modexpo_crt *crt)
261 {
262 	int mod_len, short_len;
263 	unsigned char *p, *q, *dp, *dq, *u, *inp;
264 
265 	mod_len = crt->inputdatalength;
266 	short_len = (mod_len + 1) / 2;
267 
268 	/*
269 	 * CEX2A and CEX3A w/o FW update can handle requests up to
270 	 * 256 byte modulus (2k keys).
271 	 * CEX3A with FW update and newer CEXxA cards are able to handle
272 	 * 512 byte modulus (4k keys).
273 	 */
274 	if (mod_len <= 128) {		/* up to 1024 bit key size */
275 		struct type50_crb1_msg *crb1 = ap_msg->msg;
276 
277 		memset(crb1, 0, sizeof(*crb1));
278 		ap_msg->len = sizeof(*crb1);
279 		crb1->header.msg_type_code = TYPE50_TYPE_CODE;
280 		crb1->header.msg_len = sizeof(*crb1);
281 		crb1->keyblock_type = TYPE50_CRB1_FMT;
282 		p = crb1->p + sizeof(crb1->p) - short_len;
283 		q = crb1->q + sizeof(crb1->q) - short_len;
284 		dp = crb1->dp + sizeof(crb1->dp) - short_len;
285 		dq = crb1->dq + sizeof(crb1->dq) - short_len;
286 		u = crb1->u + sizeof(crb1->u) - short_len;
287 		inp = crb1->message + sizeof(crb1->message) - mod_len;
288 	} else if (mod_len <= 256) {	/* up to 2048 bit key size */
289 		struct type50_crb2_msg *crb2 = ap_msg->msg;
290 
291 		memset(crb2, 0, sizeof(*crb2));
292 		ap_msg->len = sizeof(*crb2);
293 		crb2->header.msg_type_code = TYPE50_TYPE_CODE;
294 		crb2->header.msg_len = sizeof(*crb2);
295 		crb2->keyblock_type = TYPE50_CRB2_FMT;
296 		p = crb2->p + sizeof(crb2->p) - short_len;
297 		q = crb2->q + sizeof(crb2->q) - short_len;
298 		dp = crb2->dp + sizeof(crb2->dp) - short_len;
299 		dq = crb2->dq + sizeof(crb2->dq) - short_len;
300 		u = crb2->u + sizeof(crb2->u) - short_len;
301 		inp = crb2->message + sizeof(crb2->message) - mod_len;
302 	} else if ((mod_len <= 512) &&	/* up to 4096 bit key size */
303 		   (zq->zcard->max_mod_size == CEX3A_MAX_MOD_SIZE)) {
304 		struct type50_crb3_msg *crb3 = ap_msg->msg;
305 
306 		memset(crb3, 0, sizeof(*crb3));
307 		ap_msg->len = sizeof(*crb3);
308 		crb3->header.msg_type_code = TYPE50_TYPE_CODE;
309 		crb3->header.msg_len = sizeof(*crb3);
310 		crb3->keyblock_type = TYPE50_CRB3_FMT;
311 		p = crb3->p + sizeof(crb3->p) - short_len;
312 		q = crb3->q + sizeof(crb3->q) - short_len;
313 		dp = crb3->dp + sizeof(crb3->dp) - short_len;
314 		dq = crb3->dq + sizeof(crb3->dq) - short_len;
315 		u = crb3->u + sizeof(crb3->u) - short_len;
316 		inp = crb3->message + sizeof(crb3->message) - mod_len;
317 	} else {
318 		return -EINVAL;
319 	}
320 
321 	/*
322 	 * correct the offset of p, bp and mult_inv according zcrypt.h
323 	 * block size right aligned (skip the first byte)
324 	 */
325 	if (copy_from_user(p, crt->np_prime + MSGTYPE_ADJUSTMENT, short_len) ||
326 	    copy_from_user(q, crt->nq_prime, short_len) ||
327 	    copy_from_user(dp, crt->bp_key + MSGTYPE_ADJUSTMENT, short_len) ||
328 	    copy_from_user(dq, crt->bq_key, short_len) ||
329 	    copy_from_user(u, crt->u_mult_inv + MSGTYPE_ADJUSTMENT, short_len) ||
330 	    copy_from_user(inp, crt->inputdata, mod_len))
331 		return -EFAULT;
332 
333 	return 0;
334 }
335 
336 /*
337  * Copy results from a type 80 reply message back to user space.
338  *
339  * @zq: crypto device pointer
340  * @reply: reply AP message.
341  * @data: pointer to user output data
342  * @length: size of user output data
343  *
344  * Returns 0 on success or -EFAULT.
345  */
convert_type80(struct zcrypt_queue * zq,struct ap_message * reply,char __user * outputdata,unsigned int outputdatalength)346 static int convert_type80(struct zcrypt_queue *zq,
347 			  struct ap_message *reply,
348 			  char __user *outputdata,
349 			  unsigned int outputdatalength)
350 {
351 	struct type80_hdr *t80h = reply->msg;
352 	unsigned char *data;
353 
354 	if (t80h->len < sizeof(*t80h) + outputdatalength) {
355 		/* The result is too short, the CEXxA card may not do that.. */
356 		zq->online = 0;
357 		pr_err("Crypto dev=%02x.%04x code=0x%02x => online=0 rc=EAGAIN\n",
358 		       AP_QID_CARD(zq->queue->qid),
359 		       AP_QID_QUEUE(zq->queue->qid), t80h->code);
360 		ZCRYPT_DBF_ERR("%s dev=%02x.%04x code=0x%02x => online=0 rc=EAGAIN\n",
361 			       __func__, AP_QID_CARD(zq->queue->qid),
362 			       AP_QID_QUEUE(zq->queue->qid), t80h->code);
363 		ap_send_online_uevent(&zq->queue->ap_dev, zq->online);
364 		return -EAGAIN;
365 	}
366 	BUG_ON(t80h->len > CEX3A_MAX_RESPONSE_SIZE);
367 	data = reply->msg + t80h->len - outputdatalength;
368 	if (copy_to_user(outputdata, data, outputdatalength))
369 		return -EFAULT;
370 	return 0;
371 }
372 
convert_response(struct zcrypt_queue * zq,struct ap_message * reply,char __user * outputdata,unsigned int outputdatalength)373 static int convert_response(struct zcrypt_queue *zq,
374 			    struct ap_message *reply,
375 			    char __user *outputdata,
376 			    unsigned int outputdatalength)
377 {
378 	/* Response type byte is the second byte in the response. */
379 	unsigned char rtype = ((unsigned char *)reply->msg)[1];
380 
381 	switch (rtype) {
382 	case TYPE82_RSP_CODE:
383 	case TYPE88_RSP_CODE:
384 		return convert_error(zq, reply);
385 	case TYPE80_RSP_CODE:
386 		return convert_type80(zq, reply,
387 				      outputdata, outputdatalength);
388 	default: /* Unknown response type, this should NEVER EVER happen */
389 		zq->online = 0;
390 		pr_err("Crypto dev=%02x.%04x unknown response type 0x%02x => online=0 rc=EAGAIN\n",
391 		       AP_QID_CARD(zq->queue->qid),
392 		       AP_QID_QUEUE(zq->queue->qid),
393 		       (int)rtype);
394 		ZCRYPT_DBF_ERR(
395 			"%s dev=%02x.%04x unknown response type 0x%02x => online=0 rc=EAGAIN\n",
396 			__func__, AP_QID_CARD(zq->queue->qid),
397 			AP_QID_QUEUE(zq->queue->qid), (int)rtype);
398 		ap_send_online_uevent(&zq->queue->ap_dev, zq->online);
399 		return -EAGAIN;
400 	}
401 }
402 
403 /*
404  * This function is called from the AP bus code after a crypto request
405  * "msg" has finished with the reply message "reply".
406  * It is called from tasklet context.
407  * @aq: pointer to the AP device
408  * @msg: pointer to the AP message
409  * @reply: pointer to the AP reply message
410  */
zcrypt_msgtype50_receive(struct ap_queue * aq,struct ap_message * msg,struct ap_message * reply)411 static void zcrypt_msgtype50_receive(struct ap_queue *aq,
412 				     struct ap_message *msg,
413 				     struct ap_message *reply)
414 {
415 	static struct error_hdr error_reply = {
416 		.type = TYPE82_RSP_CODE,
417 		.reply_code = REP82_ERROR_MACHINE_FAILURE,
418 	};
419 	struct type80_hdr *t80h;
420 	int len;
421 
422 	/* Copy the reply message to the request message buffer. */
423 	if (!reply)
424 		goto out;	/* ap_msg->rc indicates the error */
425 	t80h = reply->msg;
426 	if (t80h->type == TYPE80_RSP_CODE) {
427 		len = t80h->len;
428 		if (len > reply->bufsize || len > msg->bufsize ||
429 		    len != reply->len) {
430 			ZCRYPT_DBF_DBG("%s len mismatch => EMSGSIZE\n", __func__);
431 			msg->rc = -EMSGSIZE;
432 			goto out;
433 		}
434 		memcpy(msg->msg, reply->msg, len);
435 		msg->len = len;
436 	} else {
437 		memcpy(msg->msg, reply->msg, sizeof(error_reply));
438 		msg->len = sizeof(error_reply);
439 	}
440 out:
441 	complete((struct completion *)msg->private);
442 }
443 
444 static atomic_t zcrypt_step = ATOMIC_INIT(0);
445 
446 /*
447  * The request distributor calls this function if it picked the CEXxA
448  * device to handle a modexpo request.
449  * @zq: pointer to zcrypt_queue structure that identifies the
450  *	CEXxA device to the request distributor
451  * @mex: pointer to the modexpo request buffer
452  */
zcrypt_msgtype50_modexpo(struct zcrypt_queue * zq,struct ica_rsa_modexpo * mex,struct ap_message * ap_msg)453 static long zcrypt_msgtype50_modexpo(struct zcrypt_queue *zq,
454 				     struct ica_rsa_modexpo *mex,
455 				     struct ap_message *ap_msg)
456 {
457 	struct completion work;
458 	int rc;
459 
460 	ap_msg->bufsize = MSGTYPE50_CRB3_MAX_MSG_SIZE;
461 	ap_msg->msg = kmalloc(ap_msg->bufsize, GFP_KERNEL);
462 	if (!ap_msg->msg)
463 		return -ENOMEM;
464 	ap_msg->receive = zcrypt_msgtype50_receive;
465 	ap_msg->psmid = (((unsigned long)current->pid) << 32) +
466 		atomic_inc_return(&zcrypt_step);
467 	ap_msg->private = &work;
468 	rc = ICAMEX_msg_to_type50MEX_msg(zq, ap_msg, mex);
469 	if (rc)
470 		goto out;
471 	init_completion(&work);
472 	rc = ap_queue_message(zq->queue, ap_msg);
473 	if (rc)
474 		goto out;
475 	rc = wait_for_completion_interruptible(&work);
476 	if (rc == 0) {
477 		rc = ap_msg->rc;
478 		if (rc == 0)
479 			rc = convert_response(zq, ap_msg,
480 					      mex->outputdata,
481 					      mex->outputdatalength);
482 	} else {
483 		/* Signal pending. */
484 		ap_cancel_message(zq->queue, ap_msg);
485 	}
486 
487 out:
488 	ap_msg->private = NULL;
489 	if (rc)
490 		ZCRYPT_DBF_DBG("%s send me cprb at dev=%02x.%04x rc=%d\n",
491 			       __func__, AP_QID_CARD(zq->queue->qid),
492 			       AP_QID_QUEUE(zq->queue->qid), rc);
493 	return rc;
494 }
495 
496 /*
497  * The request distributor calls this function if it picked the CEXxA
498  * device to handle a modexpo_crt request.
499  * @zq: pointer to zcrypt_queue structure that identifies the
500  *	CEXxA device to the request distributor
501  * @crt: pointer to the modexpoc_crt request buffer
502  */
zcrypt_msgtype50_modexpo_crt(struct zcrypt_queue * zq,struct ica_rsa_modexpo_crt * crt,struct ap_message * ap_msg)503 static long zcrypt_msgtype50_modexpo_crt(struct zcrypt_queue *zq,
504 					 struct ica_rsa_modexpo_crt *crt,
505 					 struct ap_message *ap_msg)
506 {
507 	struct completion work;
508 	int rc;
509 
510 	ap_msg->bufsize = MSGTYPE50_CRB3_MAX_MSG_SIZE;
511 	ap_msg->msg = kmalloc(ap_msg->bufsize, GFP_KERNEL);
512 	if (!ap_msg->msg)
513 		return -ENOMEM;
514 	ap_msg->receive = zcrypt_msgtype50_receive;
515 	ap_msg->psmid = (((unsigned long)current->pid) << 32) +
516 		atomic_inc_return(&zcrypt_step);
517 	ap_msg->private = &work;
518 	rc = ICACRT_msg_to_type50CRT_msg(zq, ap_msg, crt);
519 	if (rc)
520 		goto out;
521 	init_completion(&work);
522 	rc = ap_queue_message(zq->queue, ap_msg);
523 	if (rc)
524 		goto out;
525 	rc = wait_for_completion_interruptible(&work);
526 	if (rc == 0) {
527 		rc = ap_msg->rc;
528 		if (rc == 0)
529 			rc = convert_response(zq, ap_msg,
530 					      crt->outputdata,
531 					      crt->outputdatalength);
532 	} else {
533 		/* Signal pending. */
534 		ap_cancel_message(zq->queue, ap_msg);
535 	}
536 
537 out:
538 	ap_msg->private = NULL;
539 	if (rc)
540 		ZCRYPT_DBF_DBG("%s send crt cprb at dev=%02x.%04x rc=%d\n",
541 			       __func__, AP_QID_CARD(zq->queue->qid),
542 			       AP_QID_QUEUE(zq->queue->qid), rc);
543 	return rc;
544 }
545 
546 /*
547  * The crypto operations for message type 50.
548  */
549 static struct zcrypt_ops zcrypt_msgtype50_ops = {
550 	.rsa_modexpo = zcrypt_msgtype50_modexpo,
551 	.rsa_modexpo_crt = zcrypt_msgtype50_modexpo_crt,
552 	.owner = THIS_MODULE,
553 	.name = MSGTYPE50_NAME,
554 	.variant = MSGTYPE50_VARIANT_DEFAULT,
555 };
556 
zcrypt_msgtype50_init(void)557 void __init zcrypt_msgtype50_init(void)
558 {
559 	zcrypt_msgtype_register(&zcrypt_msgtype50_ops);
560 }
561 
zcrypt_msgtype50_exit(void)562 void __exit zcrypt_msgtype50_exit(void)
563 {
564 	zcrypt_msgtype_unregister(&zcrypt_msgtype50_ops);
565 }
566