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1/*
2 * Cryptographic API.
3 *
4 * Support for s390 cryptographic instructions.
5 *
6 * Copyright IBM Corp. 2003, 2007
7 * Author(s): Thomas Spatzier
8 * Jan Glauber (jan.glauber@de.ibm.com)
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
13 * any later version.
14 *
15 */
16#ifndef _CRYPTO_ARCH_S390_CRYPT_S390_H
17#define _CRYPTO_ARCH_S390_CRYPT_S390_H
18
19#include <asm/errno.h>
20#include <asm/facility.h>
21
22#define CRYPT_S390_OP_MASK 0xFF00
23#define CRYPT_S390_FUNC_MASK 0x00FF
24
25#define CRYPT_S390_PRIORITY 300
26#define CRYPT_S390_COMPOSITE_PRIORITY 400
27
28#define CRYPT_S390_MSA 0x1
29#define CRYPT_S390_MSA3 0x2
30#define CRYPT_S390_MSA4 0x4
31
32/* s390 cryptographic operations */
33enum crypt_s390_operations {
34 CRYPT_S390_KM = 0x0100,
35 CRYPT_S390_KMC = 0x0200,
36 CRYPT_S390_KIMD = 0x0300,
37 CRYPT_S390_KLMD = 0x0400,
38 CRYPT_S390_KMAC = 0x0500,
39 CRYPT_S390_KMCTR = 0x0600
40};
41
42/*
43 * function codes for KM (CIPHER MESSAGE) instruction
44 * 0x80 is the decipher modifier bit
45 */
46enum crypt_s390_km_func {
47 KM_QUERY = CRYPT_S390_KM | 0x0,
48 KM_DEA_ENCRYPT = CRYPT_S390_KM | 0x1,
49 KM_DEA_DECRYPT = CRYPT_S390_KM | 0x1 | 0x80,
50 KM_TDEA_128_ENCRYPT = CRYPT_S390_KM | 0x2,
51 KM_TDEA_128_DECRYPT = CRYPT_S390_KM | 0x2 | 0x80,
52 KM_TDEA_192_ENCRYPT = CRYPT_S390_KM | 0x3,
53 KM_TDEA_192_DECRYPT = CRYPT_S390_KM | 0x3 | 0x80,
54 KM_AES_128_ENCRYPT = CRYPT_S390_KM | 0x12,
55 KM_AES_128_DECRYPT = CRYPT_S390_KM | 0x12 | 0x80,
56 KM_AES_192_ENCRYPT = CRYPT_S390_KM | 0x13,
57 KM_AES_192_DECRYPT = CRYPT_S390_KM | 0x13 | 0x80,
58 KM_AES_256_ENCRYPT = CRYPT_S390_KM | 0x14,
59 KM_AES_256_DECRYPT = CRYPT_S390_KM | 0x14 | 0x80,
60 KM_XTS_128_ENCRYPT = CRYPT_S390_KM | 0x32,
61 KM_XTS_128_DECRYPT = CRYPT_S390_KM | 0x32 | 0x80,
62 KM_XTS_256_ENCRYPT = CRYPT_S390_KM | 0x34,
63 KM_XTS_256_DECRYPT = CRYPT_S390_KM | 0x34 | 0x80,
64};
65
66/*
67 * function codes for KMC (CIPHER MESSAGE WITH CHAINING)
68 * instruction
69 */
70enum crypt_s390_kmc_func {
71 KMC_QUERY = CRYPT_S390_KMC | 0x0,
72 KMC_DEA_ENCRYPT = CRYPT_S390_KMC | 0x1,
73 KMC_DEA_DECRYPT = CRYPT_S390_KMC | 0x1 | 0x80,
74 KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC | 0x2,
75 KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC | 0x2 | 0x80,
76 KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC | 0x3,
77 KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC | 0x3 | 0x80,
78 KMC_AES_128_ENCRYPT = CRYPT_S390_KMC | 0x12,
79 KMC_AES_128_DECRYPT = CRYPT_S390_KMC | 0x12 | 0x80,
80 KMC_AES_192_ENCRYPT = CRYPT_S390_KMC | 0x13,
81 KMC_AES_192_DECRYPT = CRYPT_S390_KMC | 0x13 | 0x80,
82 KMC_AES_256_ENCRYPT = CRYPT_S390_KMC | 0x14,
83 KMC_AES_256_DECRYPT = CRYPT_S390_KMC | 0x14 | 0x80,
84 KMC_PRNG = CRYPT_S390_KMC | 0x43,
85};
86
87/*
88 * function codes for KMCTR (CIPHER MESSAGE WITH COUNTER)
89 * instruction
90 */
91enum crypt_s390_kmctr_func {
92 KMCTR_QUERY = CRYPT_S390_KMCTR | 0x0,
93 KMCTR_DEA_ENCRYPT = CRYPT_S390_KMCTR | 0x1,
94 KMCTR_DEA_DECRYPT = CRYPT_S390_KMCTR | 0x1 | 0x80,
95 KMCTR_TDEA_128_ENCRYPT = CRYPT_S390_KMCTR | 0x2,
96 KMCTR_TDEA_128_DECRYPT = CRYPT_S390_KMCTR | 0x2 | 0x80,
97 KMCTR_TDEA_192_ENCRYPT = CRYPT_S390_KMCTR | 0x3,
98 KMCTR_TDEA_192_DECRYPT = CRYPT_S390_KMCTR | 0x3 | 0x80,
99 KMCTR_AES_128_ENCRYPT = CRYPT_S390_KMCTR | 0x12,
100 KMCTR_AES_128_DECRYPT = CRYPT_S390_KMCTR | 0x12 | 0x80,
101 KMCTR_AES_192_ENCRYPT = CRYPT_S390_KMCTR | 0x13,
102 KMCTR_AES_192_DECRYPT = CRYPT_S390_KMCTR | 0x13 | 0x80,
103 KMCTR_AES_256_ENCRYPT = CRYPT_S390_KMCTR | 0x14,
104 KMCTR_AES_256_DECRYPT = CRYPT_S390_KMCTR | 0x14 | 0x80,
105};
106
107/*
108 * function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
109 * instruction
110 */
111enum crypt_s390_kimd_func {
112 KIMD_QUERY = CRYPT_S390_KIMD | 0,
113 KIMD_SHA_1 = CRYPT_S390_KIMD | 1,
114 KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
115 KIMD_SHA_512 = CRYPT_S390_KIMD | 3,
116 KIMD_GHASH = CRYPT_S390_KIMD | 65,
117};
118
119/*
120 * function codes for KLMD (COMPUTE LAST MESSAGE DIGEST)
121 * instruction
122 */
123enum crypt_s390_klmd_func {
124 KLMD_QUERY = CRYPT_S390_KLMD | 0,
125 KLMD_SHA_1 = CRYPT_S390_KLMD | 1,
126 KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
127 KLMD_SHA_512 = CRYPT_S390_KLMD | 3,
128};
129
130/*
131 * function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
132 * instruction
133 */
134enum crypt_s390_kmac_func {
135 KMAC_QUERY = CRYPT_S390_KMAC | 0,
136 KMAC_DEA = CRYPT_S390_KMAC | 1,
137 KMAC_TDEA_128 = CRYPT_S390_KMAC | 2,
138 KMAC_TDEA_192 = CRYPT_S390_KMAC | 3
139};
140
141/**
142 * crypt_s390_km:
143 * @func: the function code passed to KM; see crypt_s390_km_func
144 * @param: address of parameter block; see POP for details on each func
145 * @dest: address of destination memory area
146 * @src: address of source memory area
147 * @src_len: length of src operand in bytes
148 *
149 * Executes the KM (CIPHER MESSAGE) operation of the CPU.
150 *
151 * Returns -1 for failure, 0 for the query func, number of processed
152 * bytes for encryption/decryption funcs
153 */
154static inline int crypt_s390_km(long func, void *param,
155 u8 *dest, const u8 *src, long src_len)
156{
157 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
158 register void *__param asm("1") = param;
159 register const u8 *__src asm("2") = src;
160 register long __src_len asm("3") = src_len;
161 register u8 *__dest asm("4") = dest;
162 int ret;
163
164 asm volatile(
165 "0: .insn rre,0xb92e0000,%3,%1 \n" /* KM opcode */
166 "1: brc 1,0b \n" /* handle partial completion */
167 " la %0,0\n"
168 "2:\n"
169 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
170 : "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
171 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
172 if (ret < 0)
173 return ret;
174 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
175}
176
177/**
178 * crypt_s390_kmc:
179 * @func: the function code passed to KM; see crypt_s390_kmc_func
180 * @param: address of parameter block; see POP for details on each func
181 * @dest: address of destination memory area
182 * @src: address of source memory area
183 * @src_len: length of src operand in bytes
184 *
185 * Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
186 *
187 * Returns -1 for failure, 0 for the query func, number of processed
188 * bytes for encryption/decryption funcs
189 */
190static inline int crypt_s390_kmc(long func, void *param,
191 u8 *dest, const u8 *src, long src_len)
192{
193 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
194 register void *__param asm("1") = param;
195 register const u8 *__src asm("2") = src;
196 register long __src_len asm("3") = src_len;
197 register u8 *__dest asm("4") = dest;
198 int ret;
199
200 asm volatile(
201 "0: .insn rre,0xb92f0000,%3,%1 \n" /* KMC opcode */
202 "1: brc 1,0b \n" /* handle partial completion */
203 " la %0,0\n"
204 "2:\n"
205 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
206 : "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
207 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
208 if (ret < 0)
209 return ret;
210 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
211}
212
213/**
214 * crypt_s390_kimd:
215 * @func: the function code passed to KM; see crypt_s390_kimd_func
216 * @param: address of parameter block; see POP for details on each func
217 * @src: address of source memory area
218 * @src_len: length of src operand in bytes
219 *
220 * Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
221 * of the CPU.
222 *
223 * Returns -1 for failure, 0 for the query func, number of processed
224 * bytes for digest funcs
225 */
226static inline int crypt_s390_kimd(long func, void *param,
227 const u8 *src, long src_len)
228{
229 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
230 register void *__param asm("1") = param;
231 register const u8 *__src asm("2") = src;
232 register long __src_len asm("3") = src_len;
233 int ret;
234
235 asm volatile(
236 "0: .insn rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */
237 "1: brc 1,0b \n" /* handle partial completion */
238 " la %0,0\n"
239 "2:\n"
240 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
241 : "=d" (ret), "+a" (__src), "+d" (__src_len)
242 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
243 if (ret < 0)
244 return ret;
245 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
246}
247
248/**
249 * crypt_s390_klmd:
250 * @func: the function code passed to KM; see crypt_s390_klmd_func
251 * @param: address of parameter block; see POP for details on each func
252 * @src: address of source memory area
253 * @src_len: length of src operand in bytes
254 *
255 * Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
256 *
257 * Returns -1 for failure, 0 for the query func, number of processed
258 * bytes for digest funcs
259 */
260static inline int crypt_s390_klmd(long func, void *param,
261 const u8 *src, long src_len)
262{
263 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
264 register void *__param asm("1") = param;
265 register const u8 *__src asm("2") = src;
266 register long __src_len asm("3") = src_len;
267 int ret;
268
269 asm volatile(
270 "0: .insn rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */
271 "1: brc 1,0b \n" /* handle partial completion */
272 " la %0,0\n"
273 "2:\n"
274 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
275 : "=d" (ret), "+a" (__src), "+d" (__src_len)
276 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
277 if (ret < 0)
278 return ret;
279 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
280}
281
282/**
283 * crypt_s390_kmac:
284 * @func: the function code passed to KM; see crypt_s390_klmd_func
285 * @param: address of parameter block; see POP for details on each func
286 * @src: address of source memory area
287 * @src_len: length of src operand in bytes
288 *
289 * Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
290 * of the CPU.
291 *
292 * Returns -1 for failure, 0 for the query func, number of processed
293 * bytes for digest funcs
294 */
295static inline int crypt_s390_kmac(long func, void *param,
296 const u8 *src, long src_len)
297{
298 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
299 register void *__param asm("1") = param;
300 register const u8 *__src asm("2") = src;
301 register long __src_len asm("3") = src_len;
302 int ret;
303
304 asm volatile(
305 "0: .insn rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */
306 "1: brc 1,0b \n" /* handle partial completion */
307 " la %0,0\n"
308 "2:\n"
309 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
310 : "=d" (ret), "+a" (__src), "+d" (__src_len)
311 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
312 if (ret < 0)
313 return ret;
314 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
315}
316
317/**
318 * crypt_s390_kmctr:
319 * @func: the function code passed to KMCTR; see crypt_s390_kmctr_func
320 * @param: address of parameter block; see POP for details on each func
321 * @dest: address of destination memory area
322 * @src: address of source memory area
323 * @src_len: length of src operand in bytes
324 * @counter: address of counter value
325 *
326 * Executes the KMCTR (CIPHER MESSAGE WITH COUNTER) operation of the CPU.
327 *
328 * Returns -1 for failure, 0 for the query func, number of processed
329 * bytes for encryption/decryption funcs
330 */
331static inline int crypt_s390_kmctr(long func, void *param, u8 *dest,
332 const u8 *src, long src_len, u8 *counter)
333{
334 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
335 register void *__param asm("1") = param;
336 register const u8 *__src asm("2") = src;
337 register long __src_len asm("3") = src_len;
338 register u8 *__dest asm("4") = dest;
339 register u8 *__ctr asm("6") = counter;
340 int ret = -1;
341
342 asm volatile(
343 "0: .insn rrf,0xb92d0000,%3,%1,%4,0 \n" /* KMCTR opcode */
344 "1: brc 1,0b \n" /* handle partial completion */
345 " la %0,0\n"
346 "2:\n"
347 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
348 : "+d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest),
349 "+a" (__ctr)
350 : "d" (__func), "a" (__param) : "cc", "memory");
351 if (ret < 0)
352 return ret;
353 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
354}
355
356/**
357 * crypt_s390_func_available:
358 * @func: the function code of the specific function; 0 if op in general
359 *
360 * Tests if a specific crypto function is implemented on the machine.
361 *
362 * Returns 1 if func available; 0 if func or op in general not available
363 */
364static inline int crypt_s390_func_available(int func,
365 unsigned int facility_mask)
366{
367 unsigned char status[16];
368 int ret;
369
370 if (facility_mask & CRYPT_S390_MSA && !test_facility(17))
371 return 0;
372
373 if (facility_mask & CRYPT_S390_MSA3 &&
374 (!test_facility(2) || !test_facility(76)))
375 return 0;
376 if (facility_mask & CRYPT_S390_MSA4 &&
377 (!test_facility(2) || !test_facility(77)))
378 return 0;
379
380 switch (func & CRYPT_S390_OP_MASK) {
381 case CRYPT_S390_KM:
382 ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
383 break;
384 case CRYPT_S390_KMC:
385 ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0);
386 break;
387 case CRYPT_S390_KIMD:
388 ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0);
389 break;
390 case CRYPT_S390_KLMD:
391 ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0);
392 break;
393 case CRYPT_S390_KMAC:
394 ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
395 break;
396 case CRYPT_S390_KMCTR:
397 ret = crypt_s390_kmctr(KMCTR_QUERY, &status, NULL, NULL, 0,
398 NULL);
399 break;
400 default:
401 return 0;
402 }
403 if (ret < 0)
404 return 0;
405 func &= CRYPT_S390_FUNC_MASK;
406 func &= 0x7f; /* mask modifier bit */
407 return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
408}
409
410/**
411 * crypt_s390_pcc:
412 * @func: the function code passed to KM; see crypt_s390_km_func
413 * @param: address of parameter block; see POP for details on each func
414 *
415 * Executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION) operation of the CPU.
416 *
417 * Returns -1 for failure, 0 for success.
418 */
419static inline int crypt_s390_pcc(long func, void *param)
420{
421 register long __func asm("0") = func & 0x7f; /* encrypt or decrypt */
422 register void *__param asm("1") = param;
423 int ret = -1;
424
425 asm volatile(
426 "0: .insn rre,0xb92c0000,0,0 \n" /* PCC opcode */
427 "1: brc 1,0b \n" /* handle partial completion */
428 " la %0,0\n"
429 "2:\n"
430 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
431 : "+d" (ret)
432 : "d" (__func), "a" (__param) : "cc", "memory");
433 return ret;
434}
435
436
437#endif /* _CRYPTO_ARCH_S390_CRYPT_S390_H */