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[/] [test_project/] [trunk/] [linux_sd_driver/] [arch/] [s390/] [crypto/] [des_s390.c] - Blame information for rev 63

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1 63 marcus.erl
/*
2
 * Cryptographic API.
3
 *
4
 * s390 implementation of the DES Cipher Algorithm.
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
11
 * it under the terms of the GNU General Public License as published by
12
 * the Free Software Foundation; either version 2 of the License, or
13
 * (at your option) any later version.
14
 *
15
 */
16
 
17
#include <crypto/algapi.h>
18
#include <linux/init.h>
19
#include <linux/module.h>
20
 
21
#include "crypt_s390.h"
22
#include "crypto_des.h"
23
 
24
#define DES_BLOCK_SIZE 8
25
#define DES_KEY_SIZE 8
26
 
27
#define DES3_128_KEY_SIZE       (2 * DES_KEY_SIZE)
28
#define DES3_128_BLOCK_SIZE     DES_BLOCK_SIZE
29
 
30
#define DES3_192_KEY_SIZE       (3 * DES_KEY_SIZE)
31
#define DES3_192_BLOCK_SIZE     DES_BLOCK_SIZE
32
 
33
struct crypt_s390_des_ctx {
34
        u8 iv[DES_BLOCK_SIZE];
35
        u8 key[DES_KEY_SIZE];
36
};
37
 
38
struct crypt_s390_des3_128_ctx {
39
        u8 iv[DES_BLOCK_SIZE];
40
        u8 key[DES3_128_KEY_SIZE];
41
};
42
 
43
struct crypt_s390_des3_192_ctx {
44
        u8 iv[DES_BLOCK_SIZE];
45
        u8 key[DES3_192_KEY_SIZE];
46
};
47
 
48
static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
49
                      unsigned int keylen)
50
{
51
        struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
52
        u32 *flags = &tfm->crt_flags;
53
        int ret;
54
 
55
        /* test if key is valid (not a weak key) */
56
        ret = crypto_des_check_key(key, keylen, flags);
57
        if (ret == 0)
58
                memcpy(dctx->key, key, keylen);
59
        return ret;
60
}
61
 
62
static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
63
{
64
        struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
65
 
66
        crypt_s390_km(KM_DEA_ENCRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
67
}
68
 
69
static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
70
{
71
        struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
72
 
73
        crypt_s390_km(KM_DEA_DECRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
74
}
75
 
76
static struct crypto_alg des_alg = {
77
        .cra_name               =       "des",
78
        .cra_driver_name        =       "des-s390",
79
        .cra_priority           =       CRYPT_S390_PRIORITY,
80
        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
81
        .cra_blocksize          =       DES_BLOCK_SIZE,
82
        .cra_ctxsize            =       sizeof(struct crypt_s390_des_ctx),
83
        .cra_module             =       THIS_MODULE,
84
        .cra_list               =       LIST_HEAD_INIT(des_alg.cra_list),
85
        .cra_u                  =       {
86
                .cipher = {
87
                        .cia_min_keysize        =       DES_KEY_SIZE,
88
                        .cia_max_keysize        =       DES_KEY_SIZE,
89
                        .cia_setkey             =       des_setkey,
90
                        .cia_encrypt            =       des_encrypt,
91
                        .cia_decrypt            =       des_decrypt,
92
                }
93
        }
94
};
95
 
96
static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
97
                            void *param, struct blkcipher_walk *walk)
98
{
99
        int ret = blkcipher_walk_virt(desc, walk);
100
        unsigned int nbytes;
101
 
102
        while ((nbytes = walk->nbytes)) {
103
                /* only use complete blocks */
104
                unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
105
                u8 *out = walk->dst.virt.addr;
106
                u8 *in = walk->src.virt.addr;
107
 
108
                ret = crypt_s390_km(func, param, out, in, n);
109
                BUG_ON((ret < 0) || (ret != n));
110
 
111
                nbytes &= DES_BLOCK_SIZE - 1;
112
                ret = blkcipher_walk_done(desc, walk, nbytes);
113
        }
114
 
115
        return ret;
116
}
117
 
118
static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
119
                            void *param, struct blkcipher_walk *walk)
120
{
121
        int ret = blkcipher_walk_virt(desc, walk);
122
        unsigned int nbytes = walk->nbytes;
123
 
124
        if (!nbytes)
125
                goto out;
126
 
127
        memcpy(param, walk->iv, DES_BLOCK_SIZE);
128
        do {
129
                /* only use complete blocks */
130
                unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
131
                u8 *out = walk->dst.virt.addr;
132
                u8 *in = walk->src.virt.addr;
133
 
134
                ret = crypt_s390_kmc(func, param, out, in, n);
135
                BUG_ON((ret < 0) || (ret != n));
136
 
137
                nbytes &= DES_BLOCK_SIZE - 1;
138
                ret = blkcipher_walk_done(desc, walk, nbytes);
139
        } while ((nbytes = walk->nbytes));
140
        memcpy(walk->iv, param, DES_BLOCK_SIZE);
141
 
142
out:
143
        return ret;
144
}
145
 
146
static int ecb_des_encrypt(struct blkcipher_desc *desc,
147
                           struct scatterlist *dst, struct scatterlist *src,
148
                           unsigned int nbytes)
149
{
150
        struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
151
        struct blkcipher_walk walk;
152
 
153
        blkcipher_walk_init(&walk, dst, src, nbytes);
154
        return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, sctx->key, &walk);
155
}
156
 
157
static int ecb_des_decrypt(struct blkcipher_desc *desc,
158
                           struct scatterlist *dst, struct scatterlist *src,
159
                           unsigned int nbytes)
160
{
161
        struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
162
        struct blkcipher_walk walk;
163
 
164
        blkcipher_walk_init(&walk, dst, src, nbytes);
165
        return ecb_desall_crypt(desc, KM_DEA_DECRYPT, sctx->key, &walk);
166
}
167
 
168
static struct crypto_alg ecb_des_alg = {
169
        .cra_name               =       "ecb(des)",
170
        .cra_driver_name        =       "ecb-des-s390",
171
        .cra_priority           =       CRYPT_S390_COMPOSITE_PRIORITY,
172
        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
173
        .cra_blocksize          =       DES_BLOCK_SIZE,
174
        .cra_ctxsize            =       sizeof(struct crypt_s390_des_ctx),
175
        .cra_type               =       &crypto_blkcipher_type,
176
        .cra_module             =       THIS_MODULE,
177
        .cra_list               =       LIST_HEAD_INIT(ecb_des_alg.cra_list),
178
        .cra_u                  =       {
179
                .blkcipher = {
180
                        .min_keysize            =       DES_KEY_SIZE,
181
                        .max_keysize            =       DES_KEY_SIZE,
182
                        .setkey                 =       des_setkey,
183
                        .encrypt                =       ecb_des_encrypt,
184
                        .decrypt                =       ecb_des_decrypt,
185
                }
186
        }
187
};
188
 
189
static int cbc_des_encrypt(struct blkcipher_desc *desc,
190
                           struct scatterlist *dst, struct scatterlist *src,
191
                           unsigned int nbytes)
192
{
193
        struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
194
        struct blkcipher_walk walk;
195
 
196
        blkcipher_walk_init(&walk, dst, src, nbytes);
197
        return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, sctx->iv, &walk);
198
}
199
 
200
static int cbc_des_decrypt(struct blkcipher_desc *desc,
201
                           struct scatterlist *dst, struct scatterlist *src,
202
                           unsigned int nbytes)
203
{
204
        struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
205
        struct blkcipher_walk walk;
206
 
207
        blkcipher_walk_init(&walk, dst, src, nbytes);
208
        return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, sctx->iv, &walk);
209
}
210
 
211
static struct crypto_alg cbc_des_alg = {
212
        .cra_name               =       "cbc(des)",
213
        .cra_driver_name        =       "cbc-des-s390",
214
        .cra_priority           =       CRYPT_S390_COMPOSITE_PRIORITY,
215
        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
216
        .cra_blocksize          =       DES_BLOCK_SIZE,
217
        .cra_ctxsize            =       sizeof(struct crypt_s390_des_ctx),
218
        .cra_type               =       &crypto_blkcipher_type,
219
        .cra_module             =       THIS_MODULE,
220
        .cra_list               =       LIST_HEAD_INIT(cbc_des_alg.cra_list),
221
        .cra_u                  =       {
222
                .blkcipher = {
223
                        .min_keysize            =       DES_KEY_SIZE,
224
                        .max_keysize            =       DES_KEY_SIZE,
225
                        .ivsize                 =       DES_BLOCK_SIZE,
226
                        .setkey                 =       des_setkey,
227
                        .encrypt                =       cbc_des_encrypt,
228
                        .decrypt                =       cbc_des_decrypt,
229
                }
230
        }
231
};
232
 
233
/*
234
 * RFC2451:
235
 *
236
 *   For DES-EDE3, there is no known need to reject weak or
237
 *   complementation keys.  Any weakness is obviated by the use of
238
 *   multiple keys.
239
 *
240
 *   However, if the two  independent 64-bit keys are equal,
241
 *   then the DES3 operation is simply the same as DES.
242
 *   Implementers MUST reject keys that exhibit this property.
243
 *
244
 */
245
static int des3_128_setkey(struct crypto_tfm *tfm, const u8 *key,
246
                           unsigned int keylen)
247
{
248
        int i, ret;
249
        struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
250
        const u8 *temp_key = key;
251
        u32 *flags = &tfm->crt_flags;
252
 
253
        if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE))) {
254
                *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
255
                return -EINVAL;
256
        }
257
        for (i = 0; i < 2; i++, temp_key += DES_KEY_SIZE) {
258
                ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
259
                if (ret < 0)
260
                        return ret;
261
        }
262
        memcpy(dctx->key, key, keylen);
263
        return 0;
264
}
265
 
266
static void des3_128_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
267
{
268
        struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
269
 
270
        crypt_s390_km(KM_TDEA_128_ENCRYPT, dctx->key, dst, (void*)src,
271
                      DES3_128_BLOCK_SIZE);
272
}
273
 
274
static void des3_128_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
275
{
276
        struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
277
 
278
        crypt_s390_km(KM_TDEA_128_DECRYPT, dctx->key, dst, (void*)src,
279
                      DES3_128_BLOCK_SIZE);
280
}
281
 
282
static struct crypto_alg des3_128_alg = {
283
        .cra_name               =       "des3_ede128",
284
        .cra_driver_name        =       "des3_ede128-s390",
285
        .cra_priority           =       CRYPT_S390_PRIORITY,
286
        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
287
        .cra_blocksize          =       DES3_128_BLOCK_SIZE,
288
        .cra_ctxsize            =       sizeof(struct crypt_s390_des3_128_ctx),
289
        .cra_module             =       THIS_MODULE,
290
        .cra_list               =       LIST_HEAD_INIT(des3_128_alg.cra_list),
291
        .cra_u                  =       {
292
                .cipher = {
293
                        .cia_min_keysize        =       DES3_128_KEY_SIZE,
294
                        .cia_max_keysize        =       DES3_128_KEY_SIZE,
295
                        .cia_setkey             =       des3_128_setkey,
296
                        .cia_encrypt            =       des3_128_encrypt,
297
                        .cia_decrypt            =       des3_128_decrypt,
298
                }
299
        }
300
};
301
 
302
static int ecb_des3_128_encrypt(struct blkcipher_desc *desc,
303
                                struct scatterlist *dst,
304
                                struct scatterlist *src, unsigned int nbytes)
305
{
306
        struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
307
        struct blkcipher_walk walk;
308
 
309
        blkcipher_walk_init(&walk, dst, src, nbytes);
310
        return ecb_desall_crypt(desc, KM_TDEA_128_ENCRYPT, sctx->key, &walk);
311
}
312
 
313
static int ecb_des3_128_decrypt(struct blkcipher_desc *desc,
314
                                struct scatterlist *dst,
315
                                struct scatterlist *src, unsigned int nbytes)
316
{
317
        struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
318
        struct blkcipher_walk walk;
319
 
320
        blkcipher_walk_init(&walk, dst, src, nbytes);
321
        return ecb_desall_crypt(desc, KM_TDEA_128_DECRYPT, sctx->key, &walk);
322
}
323
 
324
static struct crypto_alg ecb_des3_128_alg = {
325
        .cra_name               =       "ecb(des3_ede128)",
326
        .cra_driver_name        =       "ecb-des3_ede128-s390",
327
        .cra_priority           =       CRYPT_S390_COMPOSITE_PRIORITY,
328
        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
329
        .cra_blocksize          =       DES3_128_BLOCK_SIZE,
330
        .cra_ctxsize            =       sizeof(struct crypt_s390_des3_128_ctx),
331
        .cra_type               =       &crypto_blkcipher_type,
332
        .cra_module             =       THIS_MODULE,
333
        .cra_list               =       LIST_HEAD_INIT(
334
                                                ecb_des3_128_alg.cra_list),
335
        .cra_u                  =       {
336
                .blkcipher = {
337
                        .min_keysize            =       DES3_128_KEY_SIZE,
338
                        .max_keysize            =       DES3_128_KEY_SIZE,
339
                        .setkey                 =       des3_128_setkey,
340
                        .encrypt                =       ecb_des3_128_encrypt,
341
                        .decrypt                =       ecb_des3_128_decrypt,
342
                }
343
        }
344
};
345
 
346
static int cbc_des3_128_encrypt(struct blkcipher_desc *desc,
347
                                struct scatterlist *dst,
348
                                struct scatterlist *src, unsigned int nbytes)
349
{
350
        struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
351
        struct blkcipher_walk walk;
352
 
353
        blkcipher_walk_init(&walk, dst, src, nbytes);
354
        return cbc_desall_crypt(desc, KMC_TDEA_128_ENCRYPT, sctx->iv, &walk);
355
}
356
 
357
static int cbc_des3_128_decrypt(struct blkcipher_desc *desc,
358
                                struct scatterlist *dst,
359
                                struct scatterlist *src, unsigned int nbytes)
360
{
361
        struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
362
        struct blkcipher_walk walk;
363
 
364
        blkcipher_walk_init(&walk, dst, src, nbytes);
365
        return cbc_desall_crypt(desc, KMC_TDEA_128_DECRYPT, sctx->iv, &walk);
366
}
367
 
368
static struct crypto_alg cbc_des3_128_alg = {
369
        .cra_name               =       "cbc(des3_ede128)",
370
        .cra_driver_name        =       "cbc-des3_ede128-s390",
371
        .cra_priority           =       CRYPT_S390_COMPOSITE_PRIORITY,
372
        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
373
        .cra_blocksize          =       DES3_128_BLOCK_SIZE,
374
        .cra_ctxsize            =       sizeof(struct crypt_s390_des3_128_ctx),
375
        .cra_type               =       &crypto_blkcipher_type,
376
        .cra_module             =       THIS_MODULE,
377
        .cra_list               =       LIST_HEAD_INIT(
378
                                                cbc_des3_128_alg.cra_list),
379
        .cra_u                  =       {
380
                .blkcipher = {
381
                        .min_keysize            =       DES3_128_KEY_SIZE,
382
                        .max_keysize            =       DES3_128_KEY_SIZE,
383
                        .ivsize                 =       DES3_128_BLOCK_SIZE,
384
                        .setkey                 =       des3_128_setkey,
385
                        .encrypt                =       cbc_des3_128_encrypt,
386
                        .decrypt                =       cbc_des3_128_decrypt,
387
                }
388
        }
389
};
390
 
391
/*
392
 * RFC2451:
393
 *
394
 *   For DES-EDE3, there is no known need to reject weak or
395
 *   complementation keys.  Any weakness is obviated by the use of
396
 *   multiple keys.
397
 *
398
 *   However, if the first two or last two independent 64-bit keys are
399
 *   equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
400
 *   same as DES.  Implementers MUST reject keys that exhibit this
401
 *   property.
402
 *
403
 */
404
static int des3_192_setkey(struct crypto_tfm *tfm, const u8 *key,
405
                           unsigned int keylen)
406
{
407
        int i, ret;
408
        struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
409
        const u8 *temp_key = key;
410
        u32 *flags = &tfm->crt_flags;
411
 
412
        if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
413
            memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
414
                   DES_KEY_SIZE))) {
415
 
416
                *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
417
                return -EINVAL;
418
        }
419
        for (i = 0; i < 3; i++, temp_key += DES_KEY_SIZE) {
420
                ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
421
                if (ret < 0)
422
                        return ret;
423
        }
424
        memcpy(dctx->key, key, keylen);
425
        return 0;
426
}
427
 
428
static void des3_192_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
429
{
430
        struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
431
 
432
        crypt_s390_km(KM_TDEA_192_ENCRYPT, dctx->key, dst, (void*)src,
433
                      DES3_192_BLOCK_SIZE);
434
}
435
 
436
static void des3_192_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
437
{
438
        struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
439
 
440
        crypt_s390_km(KM_TDEA_192_DECRYPT, dctx->key, dst, (void*)src,
441
                      DES3_192_BLOCK_SIZE);
442
}
443
 
444
static struct crypto_alg des3_192_alg = {
445
        .cra_name               =       "des3_ede",
446
        .cra_driver_name        =       "des3_ede-s390",
447
        .cra_priority           =       CRYPT_S390_PRIORITY,
448
        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
449
        .cra_blocksize          =       DES3_192_BLOCK_SIZE,
450
        .cra_ctxsize            =       sizeof(struct crypt_s390_des3_192_ctx),
451
        .cra_module             =       THIS_MODULE,
452
        .cra_list               =       LIST_HEAD_INIT(des3_192_alg.cra_list),
453
        .cra_u                  =       {
454
                .cipher = {
455
                        .cia_min_keysize        =       DES3_192_KEY_SIZE,
456
                        .cia_max_keysize        =       DES3_192_KEY_SIZE,
457
                        .cia_setkey             =       des3_192_setkey,
458
                        .cia_encrypt            =       des3_192_encrypt,
459
                        .cia_decrypt            =       des3_192_decrypt,
460
                }
461
        }
462
};
463
 
464
static int ecb_des3_192_encrypt(struct blkcipher_desc *desc,
465
                                struct scatterlist *dst,
466
                                struct scatterlist *src, unsigned int nbytes)
467
{
468
        struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
469
        struct blkcipher_walk walk;
470
 
471
        blkcipher_walk_init(&walk, dst, src, nbytes);
472
        return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, sctx->key, &walk);
473
}
474
 
475
static int ecb_des3_192_decrypt(struct blkcipher_desc *desc,
476
                                struct scatterlist *dst,
477
                                struct scatterlist *src, unsigned int nbytes)
478
{
479
        struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
480
        struct blkcipher_walk walk;
481
 
482
        blkcipher_walk_init(&walk, dst, src, nbytes);
483
        return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, sctx->key, &walk);
484
}
485
 
486
static struct crypto_alg ecb_des3_192_alg = {
487
        .cra_name               =       "ecb(des3_ede)",
488
        .cra_driver_name        =       "ecb-des3_ede-s390",
489
        .cra_priority           =       CRYPT_S390_COMPOSITE_PRIORITY,
490
        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
491
        .cra_blocksize          =       DES3_192_BLOCK_SIZE,
492
        .cra_ctxsize            =       sizeof(struct crypt_s390_des3_192_ctx),
493
        .cra_type               =       &crypto_blkcipher_type,
494
        .cra_module             =       THIS_MODULE,
495
        .cra_list               =       LIST_HEAD_INIT(
496
                                                ecb_des3_192_alg.cra_list),
497
        .cra_u                  =       {
498
                .blkcipher = {
499
                        .min_keysize            =       DES3_192_KEY_SIZE,
500
                        .max_keysize            =       DES3_192_KEY_SIZE,
501
                        .setkey                 =       des3_192_setkey,
502
                        .encrypt                =       ecb_des3_192_encrypt,
503
                        .decrypt                =       ecb_des3_192_decrypt,
504
                }
505
        }
506
};
507
 
508
static int cbc_des3_192_encrypt(struct blkcipher_desc *desc,
509
                                struct scatterlist *dst,
510
                                struct scatterlist *src, unsigned int nbytes)
511
{
512
        struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
513
        struct blkcipher_walk walk;
514
 
515
        blkcipher_walk_init(&walk, dst, src, nbytes);
516
        return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, sctx->iv, &walk);
517
}
518
 
519
static int cbc_des3_192_decrypt(struct blkcipher_desc *desc,
520
                                struct scatterlist *dst,
521
                                struct scatterlist *src, unsigned int nbytes)
522
{
523
        struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
524
        struct blkcipher_walk walk;
525
 
526
        blkcipher_walk_init(&walk, dst, src, nbytes);
527
        return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, sctx->iv, &walk);
528
}
529
 
530
static struct crypto_alg cbc_des3_192_alg = {
531
        .cra_name               =       "cbc(des3_ede)",
532
        .cra_driver_name        =       "cbc-des3_ede-s390",
533
        .cra_priority           =       CRYPT_S390_COMPOSITE_PRIORITY,
534
        .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
535
        .cra_blocksize          =       DES3_192_BLOCK_SIZE,
536
        .cra_ctxsize            =       sizeof(struct crypt_s390_des3_192_ctx),
537
        .cra_type               =       &crypto_blkcipher_type,
538
        .cra_module             =       THIS_MODULE,
539
        .cra_list               =       LIST_HEAD_INIT(
540
                                                cbc_des3_192_alg.cra_list),
541
        .cra_u                  =       {
542
                .blkcipher = {
543
                        .min_keysize            =       DES3_192_KEY_SIZE,
544
                        .max_keysize            =       DES3_192_KEY_SIZE,
545
                        .ivsize                 =       DES3_192_BLOCK_SIZE,
546
                        .setkey                 =       des3_192_setkey,
547
                        .encrypt                =       cbc_des3_192_encrypt,
548
                        .decrypt                =       cbc_des3_192_decrypt,
549
                }
550
        }
551
};
552
 
553
static int init(void)
554
{
555
        int ret = 0;
556
 
557
        if (!crypt_s390_func_available(KM_DEA_ENCRYPT) ||
558
            !crypt_s390_func_available(KM_TDEA_128_ENCRYPT) ||
559
            !crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
560
                return -EOPNOTSUPP;
561
 
562
        ret = crypto_register_alg(&des_alg);
563
        if (ret)
564
                goto des_err;
565
        ret = crypto_register_alg(&ecb_des_alg);
566
        if (ret)
567
                goto ecb_des_err;
568
        ret = crypto_register_alg(&cbc_des_alg);
569
        if (ret)
570
                goto cbc_des_err;
571
 
572
        ret = crypto_register_alg(&des3_128_alg);
573
        if (ret)
574
                goto des3_128_err;
575
        ret = crypto_register_alg(&ecb_des3_128_alg);
576
        if (ret)
577
                goto ecb_des3_128_err;
578
        ret = crypto_register_alg(&cbc_des3_128_alg);
579
        if (ret)
580
                goto cbc_des3_128_err;
581
 
582
        ret = crypto_register_alg(&des3_192_alg);
583
        if (ret)
584
                goto des3_192_err;
585
        ret = crypto_register_alg(&ecb_des3_192_alg);
586
        if (ret)
587
                goto ecb_des3_192_err;
588
        ret = crypto_register_alg(&cbc_des3_192_alg);
589
        if (ret)
590
                goto cbc_des3_192_err;
591
 
592
out:
593
        return ret;
594
 
595
cbc_des3_192_err:
596
        crypto_unregister_alg(&ecb_des3_192_alg);
597
ecb_des3_192_err:
598
        crypto_unregister_alg(&des3_192_alg);
599
des3_192_err:
600
        crypto_unregister_alg(&cbc_des3_128_alg);
601
cbc_des3_128_err:
602
        crypto_unregister_alg(&ecb_des3_128_alg);
603
ecb_des3_128_err:
604
        crypto_unregister_alg(&des3_128_alg);
605
des3_128_err:
606
        crypto_unregister_alg(&cbc_des_alg);
607
cbc_des_err:
608
        crypto_unregister_alg(&ecb_des_alg);
609
ecb_des_err:
610
        crypto_unregister_alg(&des_alg);
611
des_err:
612
        goto out;
613
}
614
 
615
static void __exit fini(void)
616
{
617
        crypto_unregister_alg(&cbc_des3_192_alg);
618
        crypto_unregister_alg(&ecb_des3_192_alg);
619
        crypto_unregister_alg(&des3_192_alg);
620
        crypto_unregister_alg(&cbc_des3_128_alg);
621
        crypto_unregister_alg(&ecb_des3_128_alg);
622
        crypto_unregister_alg(&des3_128_alg);
623
        crypto_unregister_alg(&cbc_des_alg);
624
        crypto_unregister_alg(&ecb_des_alg);
625
        crypto_unregister_alg(&des_alg);
626
}
627
 
628
module_init(init);
629
module_exit(fini);
630
 
631
MODULE_ALIAS("des");
632
MODULE_ALIAS("des3_ede");
633
 
634
MODULE_LICENSE("GPL");
635
MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");

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