1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 1 /*
3 * Symmetric key cipher operations. 2 * Symmetric key cipher operations.
4 * 3 *
5 * Generic encrypt/decrypt wrapper for ciphers 4 * Generic encrypt/decrypt wrapper for ciphers, handles operations across
6 * multiple page boundaries by using temporary 5 * multiple page boundaries by using temporary blocks. In user context,
7 * the kernel is given a chance to schedule us 6 * the kernel is given a chance to schedule us once per page.
8 * 7 *
9 * Copyright (c) 2015 Herbert Xu <herbert@gond 8 * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>
>> 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 *
10 */ 15 */
11 16
12 #include <crypto/internal/aead.h> 17 #include <crypto/internal/aead.h>
13 #include <crypto/internal/cipher.h> <<
14 #include <crypto/internal/skcipher.h> 18 #include <crypto/internal/skcipher.h>
15 #include <crypto/scatterwalk.h> 19 #include <crypto/scatterwalk.h>
16 #include <linux/bug.h> 20 #include <linux/bug.h>
17 #include <linux/cryptouser.h> 21 #include <linux/cryptouser.h>
18 #include <linux/err.h> !! 22 #include <linux/compiler.h>
19 #include <linux/kernel.h> <<
20 #include <linux/list.h> 23 #include <linux/list.h>
21 #include <linux/mm.h> <<
22 #include <linux/module.h> 24 #include <linux/module.h>
>> 25 #include <linux/rtnetlink.h>
23 #include <linux/seq_file.h> 26 #include <linux/seq_file.h>
24 #include <linux/slab.h> <<
25 #include <linux/string.h> <<
26 #include <net/netlink.h> 27 #include <net/netlink.h>
27 #include "skcipher.h" <<
28 28
29 #define CRYPTO_ALG_TYPE_SKCIPHER_MASK 0x0000 !! 29 #include "internal.h"
30 30
31 enum { 31 enum {
32 SKCIPHER_WALK_PHYS = 1 << 0, 32 SKCIPHER_WALK_PHYS = 1 << 0,
33 SKCIPHER_WALK_SLOW = 1 << 1, 33 SKCIPHER_WALK_SLOW = 1 << 1,
34 SKCIPHER_WALK_COPY = 1 << 2, 34 SKCIPHER_WALK_COPY = 1 << 2,
35 SKCIPHER_WALK_DIFF = 1 << 3, 35 SKCIPHER_WALK_DIFF = 1 << 3,
36 SKCIPHER_WALK_SLEEP = 1 << 4, 36 SKCIPHER_WALK_SLEEP = 1 << 4,
37 }; 37 };
38 38
39 struct skcipher_walk_buffer { 39 struct skcipher_walk_buffer {
40 struct list_head entry; 40 struct list_head entry;
41 struct scatter_walk dst; 41 struct scatter_walk dst;
42 unsigned int len; 42 unsigned int len;
43 u8 *data; 43 u8 *data;
44 u8 buffer[]; 44 u8 buffer[];
45 }; 45 };
46 46
47 static const struct crypto_type crypto_skciphe <<
48 <<
49 static int skcipher_walk_next(struct skcipher_ 47 static int skcipher_walk_next(struct skcipher_walk *walk);
50 48
>> 49 static inline void skcipher_unmap(struct scatter_walk *walk, void *vaddr)
>> 50 {
>> 51 if (PageHighMem(scatterwalk_page(walk)))
>> 52 kunmap_atomic(vaddr);
>> 53 }
>> 54
>> 55 static inline void *skcipher_map(struct scatter_walk *walk)
>> 56 {
>> 57 struct page *page = scatterwalk_page(walk);
>> 58
>> 59 return (PageHighMem(page) ? kmap_atomic(page) : page_address(page)) +
>> 60 offset_in_page(walk->offset);
>> 61 }
>> 62
51 static inline void skcipher_map_src(struct skc 63 static inline void skcipher_map_src(struct skcipher_walk *walk)
52 { 64 {
53 walk->src.virt.addr = scatterwalk_map( !! 65 walk->src.virt.addr = skcipher_map(&walk->in);
54 } 66 }
55 67
56 static inline void skcipher_map_dst(struct skc 68 static inline void skcipher_map_dst(struct skcipher_walk *walk)
57 { 69 {
58 walk->dst.virt.addr = scatterwalk_map( !! 70 walk->dst.virt.addr = skcipher_map(&walk->out);
59 } 71 }
60 72
61 static inline void skcipher_unmap_src(struct s 73 static inline void skcipher_unmap_src(struct skcipher_walk *walk)
62 { 74 {
63 scatterwalk_unmap(walk->src.virt.addr) !! 75 skcipher_unmap(&walk->in, walk->src.virt.addr);
64 } 76 }
65 77
66 static inline void skcipher_unmap_dst(struct s 78 static inline void skcipher_unmap_dst(struct skcipher_walk *walk)
67 { 79 {
68 scatterwalk_unmap(walk->dst.virt.addr) !! 80 skcipher_unmap(&walk->out, walk->dst.virt.addr);
69 } 81 }
70 82
71 static inline gfp_t skcipher_walk_gfp(struct s 83 static inline gfp_t skcipher_walk_gfp(struct skcipher_walk *walk)
72 { 84 {
73 return walk->flags & SKCIPHER_WALK_SLE 85 return walk->flags & SKCIPHER_WALK_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
74 } 86 }
75 87
76 /* Get a spot of the specified length that doe 88 /* Get a spot of the specified length that does not straddle a page.
77 * The caller needs to ensure that there is en 89 * The caller needs to ensure that there is enough space for this operation.
78 */ 90 */
79 static inline u8 *skcipher_get_spot(u8 *start, 91 static inline u8 *skcipher_get_spot(u8 *start, unsigned int len)
80 { 92 {
81 u8 *end_page = (u8 *)(((unsigned long) 93 u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK);
82 94
83 return max(start, end_page); 95 return max(start, end_page);
84 } 96 }
85 97
86 static inline struct skcipher_alg *__crypto_sk !! 98 static void skcipher_done_slow(struct skcipher_walk *walk, unsigned int bsize)
87 struct crypto_alg *alg) <<
88 { <<
89 return container_of(alg, struct skciph <<
90 } <<
91 <<
92 static int skcipher_done_slow(struct skcipher_ <<
93 { 99 {
94 u8 *addr; 100 u8 *addr;
95 101
96 addr = (u8 *)ALIGN((unsigned long)walk 102 addr = (u8 *)ALIGN((unsigned long)walk->buffer, walk->alignmask + 1);
97 addr = skcipher_get_spot(addr, bsize); 103 addr = skcipher_get_spot(addr, bsize);
98 scatterwalk_copychunks(addr, &walk->ou 104 scatterwalk_copychunks(addr, &walk->out, bsize,
99 (walk->flags & 105 (walk->flags & SKCIPHER_WALK_PHYS) ? 2 : 1);
100 return 0; <<
101 } 106 }
102 107
103 int skcipher_walk_done(struct skcipher_walk *w 108 int skcipher_walk_done(struct skcipher_walk *walk, int err)
104 { 109 {
105 unsigned int n = walk->nbytes; !! 110 unsigned int n; /* bytes processed */
106 unsigned int nbytes = 0; !! 111 bool more;
107 112
108 if (!n) !! 113 if (unlikely(err < 0))
109 goto finish; 114 goto finish;
110 115
111 if (likely(err >= 0)) { !! 116 n = walk->nbytes - err;
112 n -= err; !! 117 walk->total -= n;
113 nbytes = walk->total - n; !! 118 more = (walk->total != 0);
114 } <<
115 119
116 if (likely(!(walk->flags & (SKCIPHER_W 120 if (likely(!(walk->flags & (SKCIPHER_WALK_PHYS |
117 SKCIPHER_W 121 SKCIPHER_WALK_SLOW |
118 SKCIPHER_W 122 SKCIPHER_WALK_COPY |
119 SKCIPHER_W 123 SKCIPHER_WALK_DIFF)))) {
120 unmap_src: 124 unmap_src:
121 skcipher_unmap_src(walk); 125 skcipher_unmap_src(walk);
122 } else if (walk->flags & SKCIPHER_WALK 126 } else if (walk->flags & SKCIPHER_WALK_DIFF) {
123 skcipher_unmap_dst(walk); 127 skcipher_unmap_dst(walk);
124 goto unmap_src; 128 goto unmap_src;
125 } else if (walk->flags & SKCIPHER_WALK 129 } else if (walk->flags & SKCIPHER_WALK_COPY) {
126 skcipher_map_dst(walk); 130 skcipher_map_dst(walk);
127 memcpy(walk->dst.virt.addr, wa 131 memcpy(walk->dst.virt.addr, walk->page, n);
128 skcipher_unmap_dst(walk); 132 skcipher_unmap_dst(walk);
129 } else if (unlikely(walk->flags & SKCI 133 } else if (unlikely(walk->flags & SKCIPHER_WALK_SLOW)) {
130 if (err > 0) { !! 134 if (WARN_ON(err)) {
131 /* !! 135 /* unexpected case; didn't process all bytes */
132 * Didn't process all <<
133 * broken, or this was <<
134 * the message wasn't <<
135 * the algorithm requi <<
136 */ <<
137 err = -EINVAL; 136 err = -EINVAL;
138 nbytes = 0; !! 137 goto finish;
139 } else !! 138 }
140 n = skcipher_done_slow !! 139 skcipher_done_slow(walk, n);
>> 140 goto already_advanced;
141 } 141 }
142 142
143 if (err > 0) <<
144 err = 0; <<
145 <<
146 walk->total = nbytes; <<
147 walk->nbytes = 0; <<
148 <<
149 scatterwalk_advance(&walk->in, n); 143 scatterwalk_advance(&walk->in, n);
150 scatterwalk_advance(&walk->out, n); 144 scatterwalk_advance(&walk->out, n);
151 scatterwalk_done(&walk->in, 0, nbytes) !! 145 already_advanced:
152 scatterwalk_done(&walk->out, 1, nbytes !! 146 scatterwalk_done(&walk->in, 0, more);
>> 147 scatterwalk_done(&walk->out, 1, more);
153 148
154 if (nbytes) { !! 149 if (more) {
155 crypto_yield(walk->flags & SKC 150 crypto_yield(walk->flags & SKCIPHER_WALK_SLEEP ?
156 CRYPTO_TFM_REQ_MA 151 CRYPTO_TFM_REQ_MAY_SLEEP : 0);
157 return skcipher_walk_next(walk 152 return skcipher_walk_next(walk);
158 } 153 }
159 !! 154 err = 0;
160 finish: 155 finish:
>> 156 walk->nbytes = 0;
>> 157
161 /* Short-circuit for the common/fast p 158 /* Short-circuit for the common/fast path. */
162 if (!((unsigned long)walk->buffer | (u 159 if (!((unsigned long)walk->buffer | (unsigned long)walk->page))
163 goto out; 160 goto out;
164 161
165 if (walk->flags & SKCIPHER_WALK_PHYS) 162 if (walk->flags & SKCIPHER_WALK_PHYS)
166 goto out; 163 goto out;
167 164
168 if (walk->iv != walk->oiv) 165 if (walk->iv != walk->oiv)
169 memcpy(walk->oiv, walk->iv, wa 166 memcpy(walk->oiv, walk->iv, walk->ivsize);
170 if (walk->buffer != walk->page) 167 if (walk->buffer != walk->page)
171 kfree(walk->buffer); 168 kfree(walk->buffer);
172 if (walk->page) 169 if (walk->page)
173 free_page((unsigned long)walk- 170 free_page((unsigned long)walk->page);
174 171
175 out: 172 out:
176 return err; 173 return err;
177 } 174 }
178 EXPORT_SYMBOL_GPL(skcipher_walk_done); 175 EXPORT_SYMBOL_GPL(skcipher_walk_done);
179 176
180 void skcipher_walk_complete(struct skcipher_wa 177 void skcipher_walk_complete(struct skcipher_walk *walk, int err)
181 { 178 {
182 struct skcipher_walk_buffer *p, *tmp; 179 struct skcipher_walk_buffer *p, *tmp;
183 180
184 list_for_each_entry_safe(p, tmp, &walk 181 list_for_each_entry_safe(p, tmp, &walk->buffers, entry) {
185 u8 *data; 182 u8 *data;
186 183
187 if (err) 184 if (err)
188 goto done; 185 goto done;
189 186
190 data = p->data; 187 data = p->data;
191 if (!data) { 188 if (!data) {
192 data = PTR_ALIGN(&p->b 189 data = PTR_ALIGN(&p->buffer[0], walk->alignmask + 1);
193 data = skcipher_get_sp 190 data = skcipher_get_spot(data, walk->stride);
194 } 191 }
195 192
196 scatterwalk_copychunks(data, & 193 scatterwalk_copychunks(data, &p->dst, p->len, 1);
197 194
198 if (offset_in_page(p->data) + 195 if (offset_in_page(p->data) + p->len + walk->stride >
199 PAGE_SIZE) 196 PAGE_SIZE)
200 free_page((unsigned lo 197 free_page((unsigned long)p->data);
201 198
202 done: 199 done:
203 list_del(&p->entry); 200 list_del(&p->entry);
204 kfree(p); 201 kfree(p);
205 } 202 }
206 203
207 if (!err && walk->iv != walk->oiv) 204 if (!err && walk->iv != walk->oiv)
208 memcpy(walk->oiv, walk->iv, wa 205 memcpy(walk->oiv, walk->iv, walk->ivsize);
209 if (walk->buffer != walk->page) 206 if (walk->buffer != walk->page)
210 kfree(walk->buffer); 207 kfree(walk->buffer);
211 if (walk->page) 208 if (walk->page)
212 free_page((unsigned long)walk- 209 free_page((unsigned long)walk->page);
213 } 210 }
214 EXPORT_SYMBOL_GPL(skcipher_walk_complete); 211 EXPORT_SYMBOL_GPL(skcipher_walk_complete);
215 212
216 static void skcipher_queue_write(struct skciph 213 static void skcipher_queue_write(struct skcipher_walk *walk,
217 struct skciph 214 struct skcipher_walk_buffer *p)
218 { 215 {
219 p->dst = walk->out; 216 p->dst = walk->out;
220 list_add_tail(&p->entry, &walk->buffer 217 list_add_tail(&p->entry, &walk->buffers);
221 } 218 }
222 219
223 static int skcipher_next_slow(struct skcipher_ 220 static int skcipher_next_slow(struct skcipher_walk *walk, unsigned int bsize)
224 { 221 {
225 bool phys = walk->flags & SKCIPHER_WAL 222 bool phys = walk->flags & SKCIPHER_WALK_PHYS;
226 unsigned alignmask = walk->alignmask; 223 unsigned alignmask = walk->alignmask;
227 struct skcipher_walk_buffer *p; 224 struct skcipher_walk_buffer *p;
228 unsigned a; 225 unsigned a;
229 unsigned n; 226 unsigned n;
230 u8 *buffer; 227 u8 *buffer;
231 void *v; 228 void *v;
232 229
233 if (!phys) { 230 if (!phys) {
234 if (!walk->buffer) 231 if (!walk->buffer)
235 walk->buffer = walk->p 232 walk->buffer = walk->page;
236 buffer = walk->buffer; 233 buffer = walk->buffer;
237 if (buffer) 234 if (buffer)
238 goto ok; 235 goto ok;
239 } 236 }
240 237
241 /* Start with the minimum alignment of 238 /* Start with the minimum alignment of kmalloc. */
242 a = crypto_tfm_ctx_alignment() - 1; 239 a = crypto_tfm_ctx_alignment() - 1;
243 n = bsize; 240 n = bsize;
244 241
245 if (phys) { 242 if (phys) {
246 /* Calculate the minimum align 243 /* Calculate the minimum alignment of p->buffer. */
247 a &= (sizeof(*p) ^ (sizeof(*p) 244 a &= (sizeof(*p) ^ (sizeof(*p) - 1)) >> 1;
248 n += sizeof(*p); 245 n += sizeof(*p);
249 } 246 }
250 247
251 /* Minimum size to align p->buffer by 248 /* Minimum size to align p->buffer by alignmask. */
252 n += alignmask & ~a; 249 n += alignmask & ~a;
253 250
254 /* Minimum size to ensure p->buffer do 251 /* Minimum size to ensure p->buffer does not straddle a page. */
255 n += (bsize - 1) & ~(alignmask | a); 252 n += (bsize - 1) & ~(alignmask | a);
256 253
257 v = kzalloc(n, skcipher_walk_gfp(walk) 254 v = kzalloc(n, skcipher_walk_gfp(walk));
258 if (!v) 255 if (!v)
259 return skcipher_walk_done(walk 256 return skcipher_walk_done(walk, -ENOMEM);
260 257
261 if (phys) { 258 if (phys) {
262 p = v; 259 p = v;
263 p->len = bsize; 260 p->len = bsize;
264 skcipher_queue_write(walk, p); 261 skcipher_queue_write(walk, p);
265 buffer = p->buffer; 262 buffer = p->buffer;
266 } else { 263 } else {
267 walk->buffer = v; 264 walk->buffer = v;
268 buffer = v; 265 buffer = v;
269 } 266 }
270 267
271 ok: 268 ok:
272 walk->dst.virt.addr = PTR_ALIGN(buffer 269 walk->dst.virt.addr = PTR_ALIGN(buffer, alignmask + 1);
273 walk->dst.virt.addr = skcipher_get_spo 270 walk->dst.virt.addr = skcipher_get_spot(walk->dst.virt.addr, bsize);
274 walk->src.virt.addr = walk->dst.virt.a 271 walk->src.virt.addr = walk->dst.virt.addr;
275 272
276 scatterwalk_copychunks(walk->src.virt. 273 scatterwalk_copychunks(walk->src.virt.addr, &walk->in, bsize, 0);
277 274
278 walk->nbytes = bsize; 275 walk->nbytes = bsize;
279 walk->flags |= SKCIPHER_WALK_SLOW; 276 walk->flags |= SKCIPHER_WALK_SLOW;
280 277
281 return 0; 278 return 0;
282 } 279 }
283 280
284 static int skcipher_next_copy(struct skcipher_ 281 static int skcipher_next_copy(struct skcipher_walk *walk)
285 { 282 {
286 struct skcipher_walk_buffer *p; 283 struct skcipher_walk_buffer *p;
287 u8 *tmp = walk->page; 284 u8 *tmp = walk->page;
288 285
289 skcipher_map_src(walk); 286 skcipher_map_src(walk);
290 memcpy(tmp, walk->src.virt.addr, walk- 287 memcpy(tmp, walk->src.virt.addr, walk->nbytes);
291 skcipher_unmap_src(walk); 288 skcipher_unmap_src(walk);
292 289
293 walk->src.virt.addr = tmp; 290 walk->src.virt.addr = tmp;
294 walk->dst.virt.addr = tmp; 291 walk->dst.virt.addr = tmp;
295 292
296 if (!(walk->flags & SKCIPHER_WALK_PHYS 293 if (!(walk->flags & SKCIPHER_WALK_PHYS))
297 return 0; 294 return 0;
298 295
299 p = kmalloc(sizeof(*p), skcipher_walk_ 296 p = kmalloc(sizeof(*p), skcipher_walk_gfp(walk));
300 if (!p) 297 if (!p)
301 return -ENOMEM; 298 return -ENOMEM;
302 299
303 p->data = walk->page; 300 p->data = walk->page;
304 p->len = walk->nbytes; 301 p->len = walk->nbytes;
305 skcipher_queue_write(walk, p); 302 skcipher_queue_write(walk, p);
306 303
307 if (offset_in_page(walk->page) + walk- 304 if (offset_in_page(walk->page) + walk->nbytes + walk->stride >
308 PAGE_SIZE) 305 PAGE_SIZE)
309 walk->page = NULL; 306 walk->page = NULL;
310 else 307 else
311 walk->page += walk->nbytes; 308 walk->page += walk->nbytes;
312 309
313 return 0; 310 return 0;
314 } 311 }
315 312
316 static int skcipher_next_fast(struct skcipher_ 313 static int skcipher_next_fast(struct skcipher_walk *walk)
317 { 314 {
318 unsigned long diff; 315 unsigned long diff;
319 316
320 walk->src.phys.page = scatterwalk_page 317 walk->src.phys.page = scatterwalk_page(&walk->in);
321 walk->src.phys.offset = offset_in_page 318 walk->src.phys.offset = offset_in_page(walk->in.offset);
322 walk->dst.phys.page = scatterwalk_page 319 walk->dst.phys.page = scatterwalk_page(&walk->out);
323 walk->dst.phys.offset = offset_in_page 320 walk->dst.phys.offset = offset_in_page(walk->out.offset);
324 321
325 if (walk->flags & SKCIPHER_WALK_PHYS) 322 if (walk->flags & SKCIPHER_WALK_PHYS)
326 return 0; 323 return 0;
327 324
328 diff = walk->src.phys.offset - walk->d 325 diff = walk->src.phys.offset - walk->dst.phys.offset;
329 diff |= walk->src.virt.page - walk->ds 326 diff |= walk->src.virt.page - walk->dst.virt.page;
330 327
331 skcipher_map_src(walk); 328 skcipher_map_src(walk);
332 walk->dst.virt.addr = walk->src.virt.a 329 walk->dst.virt.addr = walk->src.virt.addr;
333 330
334 if (diff) { 331 if (diff) {
335 walk->flags |= SKCIPHER_WALK_D 332 walk->flags |= SKCIPHER_WALK_DIFF;
336 skcipher_map_dst(walk); 333 skcipher_map_dst(walk);
337 } 334 }
338 335
339 return 0; 336 return 0;
340 } 337 }
341 338
342 static int skcipher_walk_next(struct skcipher_ 339 static int skcipher_walk_next(struct skcipher_walk *walk)
343 { 340 {
344 unsigned int bsize; 341 unsigned int bsize;
345 unsigned int n; 342 unsigned int n;
346 int err; 343 int err;
347 344
348 walk->flags &= ~(SKCIPHER_WALK_SLOW | 345 walk->flags &= ~(SKCIPHER_WALK_SLOW | SKCIPHER_WALK_COPY |
349 SKCIPHER_WALK_DIFF); 346 SKCIPHER_WALK_DIFF);
350 347
351 n = walk->total; 348 n = walk->total;
352 bsize = min(walk->stride, max(n, walk- 349 bsize = min(walk->stride, max(n, walk->blocksize));
353 n = scatterwalk_clamp(&walk->in, n); 350 n = scatterwalk_clamp(&walk->in, n);
354 n = scatterwalk_clamp(&walk->out, n); 351 n = scatterwalk_clamp(&walk->out, n);
355 352
356 if (unlikely(n < bsize)) { 353 if (unlikely(n < bsize)) {
357 if (unlikely(walk->total < wal 354 if (unlikely(walk->total < walk->blocksize))
358 return skcipher_walk_d 355 return skcipher_walk_done(walk, -EINVAL);
359 356
360 slow_path: 357 slow_path:
361 err = skcipher_next_slow(walk, 358 err = skcipher_next_slow(walk, bsize);
362 goto set_phys_lowmem; 359 goto set_phys_lowmem;
363 } 360 }
364 361
365 if (unlikely((walk->in.offset | walk-> 362 if (unlikely((walk->in.offset | walk->out.offset) & walk->alignmask)) {
366 if (!walk->page) { 363 if (!walk->page) {
367 gfp_t gfp = skcipher_w 364 gfp_t gfp = skcipher_walk_gfp(walk);
368 365
369 walk->page = (void *)_ 366 walk->page = (void *)__get_free_page(gfp);
370 if (!walk->page) 367 if (!walk->page)
371 goto slow_path 368 goto slow_path;
372 } 369 }
373 370
374 walk->nbytes = min_t(unsigned, 371 walk->nbytes = min_t(unsigned, n,
375 PAGE_SIZE 372 PAGE_SIZE - offset_in_page(walk->page));
376 walk->flags |= SKCIPHER_WALK_C 373 walk->flags |= SKCIPHER_WALK_COPY;
377 err = skcipher_next_copy(walk) 374 err = skcipher_next_copy(walk);
378 goto set_phys_lowmem; 375 goto set_phys_lowmem;
379 } 376 }
380 377
381 walk->nbytes = n; 378 walk->nbytes = n;
382 379
383 return skcipher_next_fast(walk); 380 return skcipher_next_fast(walk);
384 381
385 set_phys_lowmem: 382 set_phys_lowmem:
386 if (!err && (walk->flags & SKCIPHER_WA 383 if (!err && (walk->flags & SKCIPHER_WALK_PHYS)) {
387 walk->src.phys.page = virt_to_ 384 walk->src.phys.page = virt_to_page(walk->src.virt.addr);
388 walk->dst.phys.page = virt_to_ 385 walk->dst.phys.page = virt_to_page(walk->dst.virt.addr);
389 walk->src.phys.offset &= PAGE_ 386 walk->src.phys.offset &= PAGE_SIZE - 1;
390 walk->dst.phys.offset &= PAGE_ 387 walk->dst.phys.offset &= PAGE_SIZE - 1;
391 } 388 }
392 return err; 389 return err;
393 } 390 }
>> 391 EXPORT_SYMBOL_GPL(skcipher_walk_next);
394 392
395 static int skcipher_copy_iv(struct skcipher_wa 393 static int skcipher_copy_iv(struct skcipher_walk *walk)
396 { 394 {
397 unsigned a = crypto_tfm_ctx_alignment( 395 unsigned a = crypto_tfm_ctx_alignment() - 1;
398 unsigned alignmask = walk->alignmask; 396 unsigned alignmask = walk->alignmask;
399 unsigned ivsize = walk->ivsize; 397 unsigned ivsize = walk->ivsize;
400 unsigned bs = walk->stride; 398 unsigned bs = walk->stride;
401 unsigned aligned_bs; 399 unsigned aligned_bs;
402 unsigned size; 400 unsigned size;
403 u8 *iv; 401 u8 *iv;
404 402
405 aligned_bs = ALIGN(bs, alignmask + 1); 403 aligned_bs = ALIGN(bs, alignmask + 1);
406 404
407 /* Minimum size to align buffer by ali 405 /* Minimum size to align buffer by alignmask. */
408 size = alignmask & ~a; 406 size = alignmask & ~a;
409 407
410 if (walk->flags & SKCIPHER_WALK_PHYS) 408 if (walk->flags & SKCIPHER_WALK_PHYS)
411 size += ivsize; 409 size += ivsize;
412 else { 410 else {
413 size += aligned_bs + ivsize; 411 size += aligned_bs + ivsize;
414 412
415 /* Minimum size to ensure buff 413 /* Minimum size to ensure buffer does not straddle a page. */
416 size += (bs - 1) & ~(alignmask 414 size += (bs - 1) & ~(alignmask | a);
417 } 415 }
418 416
419 walk->buffer = kmalloc(size, skcipher_ 417 walk->buffer = kmalloc(size, skcipher_walk_gfp(walk));
420 if (!walk->buffer) 418 if (!walk->buffer)
421 return -ENOMEM; 419 return -ENOMEM;
422 420
423 iv = PTR_ALIGN(walk->buffer, alignmask 421 iv = PTR_ALIGN(walk->buffer, alignmask + 1);
424 iv = skcipher_get_spot(iv, bs) + align 422 iv = skcipher_get_spot(iv, bs) + aligned_bs;
425 423
426 walk->iv = memcpy(iv, walk->iv, walk-> 424 walk->iv = memcpy(iv, walk->iv, walk->ivsize);
427 return 0; 425 return 0;
428 } 426 }
429 427
430 static int skcipher_walk_first(struct skcipher 428 static int skcipher_walk_first(struct skcipher_walk *walk)
431 { 429 {
432 if (WARN_ON_ONCE(in_hardirq())) !! 430 if (WARN_ON_ONCE(in_irq()))
433 return -EDEADLK; 431 return -EDEADLK;
434 432
435 walk->buffer = NULL; 433 walk->buffer = NULL;
436 if (unlikely(((unsigned long)walk->iv 434 if (unlikely(((unsigned long)walk->iv & walk->alignmask))) {
437 int err = skcipher_copy_iv(wal 435 int err = skcipher_copy_iv(walk);
438 if (err) 436 if (err)
439 return err; 437 return err;
440 } 438 }
441 439
442 walk->page = NULL; 440 walk->page = NULL;
>> 441 walk->nbytes = walk->total;
443 442
444 return skcipher_walk_next(walk); 443 return skcipher_walk_next(walk);
445 } 444 }
446 445
447 static int skcipher_walk_skcipher(struct skcip 446 static int skcipher_walk_skcipher(struct skcipher_walk *walk,
448 struct skcip 447 struct skcipher_request *req)
449 { 448 {
450 struct crypto_skcipher *tfm = crypto_s 449 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
451 struct skcipher_alg *alg = crypto_skci <<
452 450
453 walk->total = req->cryptlen; 451 walk->total = req->cryptlen;
454 walk->nbytes = 0; 452 walk->nbytes = 0;
455 walk->iv = req->iv; 453 walk->iv = req->iv;
456 walk->oiv = req->iv; 454 walk->oiv = req->iv;
457 455
458 if (unlikely(!walk->total)) 456 if (unlikely(!walk->total))
459 return 0; 457 return 0;
460 458
461 scatterwalk_start(&walk->in, req->src) 459 scatterwalk_start(&walk->in, req->src);
462 scatterwalk_start(&walk->out, req->dst 460 scatterwalk_start(&walk->out, req->dst);
463 461
464 walk->flags &= ~SKCIPHER_WALK_SLEEP; 462 walk->flags &= ~SKCIPHER_WALK_SLEEP;
465 walk->flags |= req->base.flags & CRYPT 463 walk->flags |= req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
466 SKCIPHER_WALK_SLEEP : 0 464 SKCIPHER_WALK_SLEEP : 0;
467 465
468 walk->blocksize = crypto_skcipher_bloc 466 walk->blocksize = crypto_skcipher_blocksize(tfm);
>> 467 walk->stride = crypto_skcipher_walksize(tfm);
469 walk->ivsize = crypto_skcipher_ivsize( 468 walk->ivsize = crypto_skcipher_ivsize(tfm);
470 walk->alignmask = crypto_skcipher_alig 469 walk->alignmask = crypto_skcipher_alignmask(tfm);
471 470
472 if (alg->co.base.cra_type != &crypto_s <<
473 walk->stride = alg->co.chunksi <<
474 else <<
475 walk->stride = alg->walksize; <<
476 <<
477 return skcipher_walk_first(walk); 471 return skcipher_walk_first(walk);
478 } 472 }
479 473
480 int skcipher_walk_virt(struct skcipher_walk *w 474 int skcipher_walk_virt(struct skcipher_walk *walk,
481 struct skcipher_request 475 struct skcipher_request *req, bool atomic)
482 { 476 {
483 int err; 477 int err;
484 478
485 might_sleep_if(req->base.flags & CRYPT <<
486 <<
487 walk->flags &= ~SKCIPHER_WALK_PHYS; 479 walk->flags &= ~SKCIPHER_WALK_PHYS;
488 480
489 err = skcipher_walk_skcipher(walk, req 481 err = skcipher_walk_skcipher(walk, req);
490 482
491 walk->flags &= atomic ? ~SKCIPHER_WALK 483 walk->flags &= atomic ? ~SKCIPHER_WALK_SLEEP : ~0;
492 484
493 return err; 485 return err;
494 } 486 }
495 EXPORT_SYMBOL_GPL(skcipher_walk_virt); 487 EXPORT_SYMBOL_GPL(skcipher_walk_virt);
496 488
>> 489 void skcipher_walk_atomise(struct skcipher_walk *walk)
>> 490 {
>> 491 walk->flags &= ~SKCIPHER_WALK_SLEEP;
>> 492 }
>> 493 EXPORT_SYMBOL_GPL(skcipher_walk_atomise);
>> 494
497 int skcipher_walk_async(struct skcipher_walk * 495 int skcipher_walk_async(struct skcipher_walk *walk,
498 struct skcipher_reques 496 struct skcipher_request *req)
499 { 497 {
500 walk->flags |= SKCIPHER_WALK_PHYS; 498 walk->flags |= SKCIPHER_WALK_PHYS;
501 499
502 INIT_LIST_HEAD(&walk->buffers); 500 INIT_LIST_HEAD(&walk->buffers);
503 501
504 return skcipher_walk_skcipher(walk, re 502 return skcipher_walk_skcipher(walk, req);
505 } 503 }
506 EXPORT_SYMBOL_GPL(skcipher_walk_async); 504 EXPORT_SYMBOL_GPL(skcipher_walk_async);
507 505
508 static int skcipher_walk_aead_common(struct sk 506 static int skcipher_walk_aead_common(struct skcipher_walk *walk,
509 struct ae 507 struct aead_request *req, bool atomic)
510 { 508 {
511 struct crypto_aead *tfm = crypto_aead_ 509 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
512 int err; 510 int err;
513 511
514 walk->nbytes = 0; 512 walk->nbytes = 0;
515 walk->iv = req->iv; 513 walk->iv = req->iv;
516 walk->oiv = req->iv; 514 walk->oiv = req->iv;
517 515
518 if (unlikely(!walk->total)) 516 if (unlikely(!walk->total))
519 return 0; 517 return 0;
520 518
521 walk->flags &= ~SKCIPHER_WALK_PHYS; 519 walk->flags &= ~SKCIPHER_WALK_PHYS;
522 520
523 scatterwalk_start(&walk->in, req->src) 521 scatterwalk_start(&walk->in, req->src);
524 scatterwalk_start(&walk->out, req->dst 522 scatterwalk_start(&walk->out, req->dst);
525 523
526 scatterwalk_copychunks(NULL, &walk->in 524 scatterwalk_copychunks(NULL, &walk->in, req->assoclen, 2);
527 scatterwalk_copychunks(NULL, &walk->ou 525 scatterwalk_copychunks(NULL, &walk->out, req->assoclen, 2);
528 526
529 scatterwalk_done(&walk->in, 0, walk->t 527 scatterwalk_done(&walk->in, 0, walk->total);
530 scatterwalk_done(&walk->out, 0, walk-> 528 scatterwalk_done(&walk->out, 0, walk->total);
531 529
532 if (req->base.flags & CRYPTO_TFM_REQ_M 530 if (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP)
533 walk->flags |= SKCIPHER_WALK_S 531 walk->flags |= SKCIPHER_WALK_SLEEP;
534 else 532 else
535 walk->flags &= ~SKCIPHER_WALK_ 533 walk->flags &= ~SKCIPHER_WALK_SLEEP;
536 534
537 walk->blocksize = crypto_aead_blocksiz 535 walk->blocksize = crypto_aead_blocksize(tfm);
538 walk->stride = crypto_aead_chunksize(t 536 walk->stride = crypto_aead_chunksize(tfm);
539 walk->ivsize = crypto_aead_ivsize(tfm) 537 walk->ivsize = crypto_aead_ivsize(tfm);
540 walk->alignmask = crypto_aead_alignmas 538 walk->alignmask = crypto_aead_alignmask(tfm);
541 539
542 err = skcipher_walk_first(walk); 540 err = skcipher_walk_first(walk);
543 541
544 if (atomic) 542 if (atomic)
545 walk->flags &= ~SKCIPHER_WALK_ 543 walk->flags &= ~SKCIPHER_WALK_SLEEP;
546 544
547 return err; 545 return err;
548 } 546 }
549 547
>> 548 int skcipher_walk_aead(struct skcipher_walk *walk, struct aead_request *req,
>> 549 bool atomic)
>> 550 {
>> 551 walk->total = req->cryptlen;
>> 552
>> 553 return skcipher_walk_aead_common(walk, req, atomic);
>> 554 }
>> 555 EXPORT_SYMBOL_GPL(skcipher_walk_aead);
>> 556
550 int skcipher_walk_aead_encrypt(struct skcipher 557 int skcipher_walk_aead_encrypt(struct skcipher_walk *walk,
551 struct aead_req 558 struct aead_request *req, bool atomic)
552 { 559 {
553 walk->total = req->cryptlen; 560 walk->total = req->cryptlen;
554 561
555 return skcipher_walk_aead_common(walk, 562 return skcipher_walk_aead_common(walk, req, atomic);
556 } 563 }
557 EXPORT_SYMBOL_GPL(skcipher_walk_aead_encrypt); 564 EXPORT_SYMBOL_GPL(skcipher_walk_aead_encrypt);
558 565
559 int skcipher_walk_aead_decrypt(struct skcipher 566 int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
560 struct aead_req 567 struct aead_request *req, bool atomic)
561 { 568 {
562 struct crypto_aead *tfm = crypto_aead_ 569 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
563 570
564 walk->total = req->cryptlen - crypto_a 571 walk->total = req->cryptlen - crypto_aead_authsize(tfm);
565 572
566 return skcipher_walk_aead_common(walk, 573 return skcipher_walk_aead_common(walk, req, atomic);
567 } 574 }
568 EXPORT_SYMBOL_GPL(skcipher_walk_aead_decrypt); 575 EXPORT_SYMBOL_GPL(skcipher_walk_aead_decrypt);
569 576
570 static void skcipher_set_needkey(struct crypto !! 577 static unsigned int crypto_skcipher_extsize(struct crypto_alg *alg)
571 { 578 {
572 if (crypto_skcipher_max_keysize(tfm) ! !! 579 if (alg->cra_type == &crypto_blkcipher_type)
573 crypto_skcipher_set_flags(tfm, !! 580 return sizeof(struct crypto_blkcipher *);
>> 581
>> 582 if (alg->cra_type == &crypto_ablkcipher_type ||
>> 583 alg->cra_type == &crypto_givcipher_type)
>> 584 return sizeof(struct crypto_ablkcipher *);
>> 585
>> 586 return crypto_alg_extsize(alg);
574 } 587 }
575 588
576 static int skcipher_setkey_unaligned(struct cr !! 589 static int skcipher_setkey_blkcipher(struct crypto_skcipher *tfm,
577 const u8 590 const u8 *key, unsigned int keylen)
578 { 591 {
579 unsigned long alignmask = crypto_skcip !! 592 struct crypto_blkcipher **ctx = crypto_skcipher_ctx(tfm);
580 struct skcipher_alg *cipher = crypto_s !! 593 struct crypto_blkcipher *blkcipher = *ctx;
581 u8 *buffer, *alignbuffer; !! 594 int err;
582 unsigned long absize; <<
583 int ret; <<
584 595
585 absize = keylen + alignmask; !! 596 crypto_blkcipher_clear_flags(blkcipher, ~0);
586 buffer = kmalloc(absize, GFP_ATOMIC); !! 597 crypto_blkcipher_set_flags(blkcipher, crypto_skcipher_get_flags(tfm) &
587 if (!buffer) !! 598 CRYPTO_TFM_REQ_MASK);
588 return -ENOMEM; !! 599 err = crypto_blkcipher_setkey(blkcipher, key, keylen);
>> 600 crypto_skcipher_set_flags(tfm, crypto_blkcipher_get_flags(blkcipher) &
>> 601 CRYPTO_TFM_RES_MASK);
>> 602 if (err)
>> 603 return err;
589 604
590 alignbuffer = (u8 *)ALIGN((unsigned lo !! 605 crypto_skcipher_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
591 memcpy(alignbuffer, key, keylen); !! 606 return 0;
592 ret = cipher->setkey(tfm, alignbuffer, <<
593 kfree_sensitive(buffer); <<
594 return ret; <<
595 } 607 }
596 608
597 int crypto_skcipher_setkey(struct crypto_skcip !! 609 static int skcipher_crypt_blkcipher(struct skcipher_request *req,
598 unsigned int keylen !! 610 int (*crypt)(struct blkcipher_desc *,
>> 611 struct scatterlist *,
>> 612 struct scatterlist *,
>> 613 unsigned int))
599 { 614 {
600 struct skcipher_alg *cipher = crypto_s !! 615 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
601 unsigned long alignmask = crypto_skcip !! 616 struct crypto_blkcipher **ctx = crypto_skcipher_ctx(tfm);
602 int err; !! 617 struct blkcipher_desc desc = {
>> 618 .tfm = *ctx,
>> 619 .info = req->iv,
>> 620 .flags = req->base.flags,
>> 621 };
603 622
604 if (cipher->co.base.cra_type != &crypt <<
605 struct crypto_lskcipher **ctx <<
606 623
607 crypto_lskcipher_clear_flags(* !! 624 return crypt(&desc, req->dst, req->src, req->cryptlen);
608 crypto_lskcipher_set_flags(*ct !! 625 }
609 cry <<
610 CRY <<
611 err = crypto_lskcipher_setkey( <<
612 goto out; <<
613 } <<
614 626
615 if (keylen < cipher->min_keysize || ke !! 627 static int skcipher_encrypt_blkcipher(struct skcipher_request *req)
616 return -EINVAL; !! 628 {
>> 629 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
>> 630 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
>> 631 struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
617 632
618 if ((unsigned long)key & alignmask) !! 633 return skcipher_crypt_blkcipher(req, alg->encrypt);
619 err = skcipher_setkey_unaligne !! 634 }
620 else <<
621 err = cipher->setkey(tfm, key, <<
622 635
623 out: !! 636 static int skcipher_decrypt_blkcipher(struct skcipher_request *req)
624 if (unlikely(err)) { !! 637 {
625 skcipher_set_needkey(tfm); !! 638 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
626 return err; !! 639 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
627 } !! 640 struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
628 641
629 crypto_skcipher_clear_flags(tfm, CRYPT !! 642 return skcipher_crypt_blkcipher(req, alg->decrypt);
630 return 0; <<
631 } 643 }
632 EXPORT_SYMBOL_GPL(crypto_skcipher_setkey); <<
633 644
634 int crypto_skcipher_encrypt(struct skcipher_re !! 645 static void crypto_exit_skcipher_ops_blkcipher(struct crypto_tfm *tfm)
635 { 646 {
636 struct crypto_skcipher *tfm = crypto_s !! 647 struct crypto_blkcipher **ctx = crypto_tfm_ctx(tfm);
637 struct skcipher_alg *alg = crypto_skci <<
638 648
639 if (crypto_skcipher_get_flags(tfm) & C !! 649 crypto_free_blkcipher(*ctx);
640 return -ENOKEY; <<
641 if (alg->co.base.cra_type != &crypto_s <<
642 return crypto_lskcipher_encryp <<
643 return alg->encrypt(req); <<
644 } 650 }
645 EXPORT_SYMBOL_GPL(crypto_skcipher_encrypt); <<
646 651
647 int crypto_skcipher_decrypt(struct skcipher_re !! 652 static int crypto_init_skcipher_ops_blkcipher(struct crypto_tfm *tfm)
648 { 653 {
649 struct crypto_skcipher *tfm = crypto_s !! 654 struct crypto_alg *calg = tfm->__crt_alg;
650 struct skcipher_alg *alg = crypto_skci !! 655 struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
>> 656 struct crypto_blkcipher **ctx = crypto_tfm_ctx(tfm);
>> 657 struct crypto_blkcipher *blkcipher;
>> 658 struct crypto_tfm *btfm;
>> 659
>> 660 if (!crypto_mod_get(calg))
>> 661 return -EAGAIN;
>> 662
>> 663 btfm = __crypto_alloc_tfm(calg, CRYPTO_ALG_TYPE_BLKCIPHER,
>> 664 CRYPTO_ALG_TYPE_MASK);
>> 665 if (IS_ERR(btfm)) {
>> 666 crypto_mod_put(calg);
>> 667 return PTR_ERR(btfm);
>> 668 }
651 669
652 if (crypto_skcipher_get_flags(tfm) & C !! 670 blkcipher = __crypto_blkcipher_cast(btfm);
653 return -ENOKEY; !! 671 *ctx = blkcipher;
654 if (alg->co.base.cra_type != &crypto_s !! 672 tfm->exit = crypto_exit_skcipher_ops_blkcipher;
655 return crypto_lskcipher_decryp !! 673
656 return alg->decrypt(req); !! 674 skcipher->setkey = skcipher_setkey_blkcipher;
>> 675 skcipher->encrypt = skcipher_encrypt_blkcipher;
>> 676 skcipher->decrypt = skcipher_decrypt_blkcipher;
>> 677
>> 678 skcipher->ivsize = crypto_blkcipher_ivsize(blkcipher);
>> 679 skcipher->keysize = calg->cra_blkcipher.max_keysize;
>> 680
>> 681 if (skcipher->keysize)
>> 682 crypto_skcipher_set_flags(skcipher, CRYPTO_TFM_NEED_KEY);
>> 683
>> 684 return 0;
657 } 685 }
658 EXPORT_SYMBOL_GPL(crypto_skcipher_decrypt); <<
659 686
660 static int crypto_lskcipher_export(struct skci !! 687 static int skcipher_setkey_ablkcipher(struct crypto_skcipher *tfm,
>> 688 const u8 *key, unsigned int keylen)
661 { 689 {
662 struct crypto_skcipher *tfm = crypto_s !! 690 struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
663 u8 *ivs = skcipher_request_ctx(req); !! 691 struct crypto_ablkcipher *ablkcipher = *ctx;
664 !! 692 int err;
665 ivs = PTR_ALIGN(ivs, crypto_skcipher_a <<
666 693
667 memcpy(out, ivs + crypto_skcipher_ivsi !! 694 crypto_ablkcipher_clear_flags(ablkcipher, ~0);
668 crypto_skcipher_statesize(tfm)) !! 695 crypto_ablkcipher_set_flags(ablkcipher,
>> 696 crypto_skcipher_get_flags(tfm) &
>> 697 CRYPTO_TFM_REQ_MASK);
>> 698 err = crypto_ablkcipher_setkey(ablkcipher, key, keylen);
>> 699 crypto_skcipher_set_flags(tfm,
>> 700 crypto_ablkcipher_get_flags(ablkcipher) &
>> 701 CRYPTO_TFM_RES_MASK);
>> 702 if (err)
>> 703 return err;
669 704
>> 705 crypto_skcipher_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
670 return 0; 706 return 0;
671 } 707 }
672 708
673 static int crypto_lskcipher_import(struct skci !! 709 static int skcipher_crypt_ablkcipher(struct skcipher_request *req,
>> 710 int (*crypt)(struct ablkcipher_request *))
674 { 711 {
675 struct crypto_skcipher *tfm = crypto_s 712 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
676 u8 *ivs = skcipher_request_ctx(req); !! 713 struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
>> 714 struct ablkcipher_request *subreq = skcipher_request_ctx(req);
677 715
678 ivs = PTR_ALIGN(ivs, crypto_skcipher_a !! 716 ablkcipher_request_set_tfm(subreq, *ctx);
>> 717 ablkcipher_request_set_callback(subreq, skcipher_request_flags(req),
>> 718 req->base.complete, req->base.data);
>> 719 ablkcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
>> 720 req->iv);
679 721
680 memcpy(ivs + crypto_skcipher_ivsize(tf !! 722 return crypt(subreq);
681 crypto_skcipher_statesize(tfm)) !! 723 }
682 724
683 return 0; !! 725 static int skcipher_encrypt_ablkcipher(struct skcipher_request *req)
>> 726 {
>> 727 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
>> 728 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
>> 729 struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
>> 730
>> 731 return skcipher_crypt_ablkcipher(req, alg->encrypt);
684 } 732 }
685 733
686 static int skcipher_noexport(struct skcipher_r !! 734 static int skcipher_decrypt_ablkcipher(struct skcipher_request *req)
687 { 735 {
688 return 0; !! 736 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
>> 737 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
>> 738 struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
>> 739
>> 740 return skcipher_crypt_ablkcipher(req, alg->decrypt);
689 } 741 }
690 742
691 static int skcipher_noimport(struct skcipher_r !! 743 static void crypto_exit_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
692 { 744 {
>> 745 struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
>> 746
>> 747 crypto_free_ablkcipher(*ctx);
>> 748 }
>> 749
>> 750 static int crypto_init_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
>> 751 {
>> 752 struct crypto_alg *calg = tfm->__crt_alg;
>> 753 struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
>> 754 struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
>> 755 struct crypto_ablkcipher *ablkcipher;
>> 756 struct crypto_tfm *abtfm;
>> 757
>> 758 if (!crypto_mod_get(calg))
>> 759 return -EAGAIN;
>> 760
>> 761 abtfm = __crypto_alloc_tfm(calg, 0, 0);
>> 762 if (IS_ERR(abtfm)) {
>> 763 crypto_mod_put(calg);
>> 764 return PTR_ERR(abtfm);
>> 765 }
>> 766
>> 767 ablkcipher = __crypto_ablkcipher_cast(abtfm);
>> 768 *ctx = ablkcipher;
>> 769 tfm->exit = crypto_exit_skcipher_ops_ablkcipher;
>> 770
>> 771 skcipher->setkey = skcipher_setkey_ablkcipher;
>> 772 skcipher->encrypt = skcipher_encrypt_ablkcipher;
>> 773 skcipher->decrypt = skcipher_decrypt_ablkcipher;
>> 774
>> 775 skcipher->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
>> 776 skcipher->reqsize = crypto_ablkcipher_reqsize(ablkcipher) +
>> 777 sizeof(struct ablkcipher_request);
>> 778 skcipher->keysize = calg->cra_ablkcipher.max_keysize;
>> 779
>> 780 if (skcipher->keysize)
>> 781 crypto_skcipher_set_flags(skcipher, CRYPTO_TFM_NEED_KEY);
>> 782
693 return 0; 783 return 0;
694 } 784 }
695 785
696 int crypto_skcipher_export(struct skcipher_req !! 786 static int skcipher_setkey_unaligned(struct crypto_skcipher *tfm,
>> 787 const u8 *key, unsigned int keylen)
697 { 788 {
698 struct crypto_skcipher *tfm = crypto_s !! 789 unsigned long alignmask = crypto_skcipher_alignmask(tfm);
699 struct skcipher_alg *alg = crypto_skci !! 790 struct skcipher_alg *cipher = crypto_skcipher_alg(tfm);
>> 791 u8 *buffer, *alignbuffer;
>> 792 unsigned long absize;
>> 793 int ret;
>> 794
>> 795 absize = keylen + alignmask;
>> 796 buffer = kmalloc(absize, GFP_ATOMIC);
>> 797 if (!buffer)
>> 798 return -ENOMEM;
700 799
701 if (alg->co.base.cra_type != &crypto_s !! 800 alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
702 return crypto_lskcipher_export !! 801 memcpy(alignbuffer, key, keylen);
703 return alg->export(req, out); !! 802 ret = cipher->setkey(tfm, alignbuffer, keylen);
>> 803 kzfree(buffer);
>> 804 return ret;
704 } 805 }
705 EXPORT_SYMBOL_GPL(crypto_skcipher_export); <<
706 806
707 int crypto_skcipher_import(struct skcipher_req !! 807 static int skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
>> 808 unsigned int keylen)
708 { 809 {
709 struct crypto_skcipher *tfm = crypto_s !! 810 struct skcipher_alg *cipher = crypto_skcipher_alg(tfm);
710 struct skcipher_alg *alg = crypto_skci !! 811 unsigned long alignmask = crypto_skcipher_alignmask(tfm);
>> 812 int err;
>> 813
>> 814 if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) {
>> 815 crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
>> 816 return -EINVAL;
>> 817 }
>> 818
>> 819 if ((unsigned long)key & alignmask)
>> 820 err = skcipher_setkey_unaligned(tfm, key, keylen);
>> 821 else
>> 822 err = cipher->setkey(tfm, key, keylen);
711 823
712 if (alg->co.base.cra_type != &crypto_s !! 824 if (err)
713 return crypto_lskcipher_import !! 825 return err;
714 return alg->import(req, in); !! 826
>> 827 crypto_skcipher_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
>> 828 return 0;
715 } 829 }
716 EXPORT_SYMBOL_GPL(crypto_skcipher_import); <<
717 830
718 static void crypto_skcipher_exit_tfm(struct cr 831 static void crypto_skcipher_exit_tfm(struct crypto_tfm *tfm)
719 { 832 {
720 struct crypto_skcipher *skcipher = __c 833 struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
721 struct skcipher_alg *alg = crypto_skci 834 struct skcipher_alg *alg = crypto_skcipher_alg(skcipher);
722 835
723 alg->exit(skcipher); 836 alg->exit(skcipher);
724 } 837 }
725 838
726 static int crypto_skcipher_init_tfm(struct cry 839 static int crypto_skcipher_init_tfm(struct crypto_tfm *tfm)
727 { 840 {
728 struct crypto_skcipher *skcipher = __c 841 struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
729 struct skcipher_alg *alg = crypto_skci 842 struct skcipher_alg *alg = crypto_skcipher_alg(skcipher);
730 843
731 skcipher_set_needkey(skcipher); !! 844 if (tfm->__crt_alg->cra_type == &crypto_blkcipher_type)
>> 845 return crypto_init_skcipher_ops_blkcipher(tfm);
732 846
733 if (tfm->__crt_alg->cra_type != &crypt !! 847 if (tfm->__crt_alg->cra_type == &crypto_ablkcipher_type ||
734 unsigned am = crypto_skcipher_ !! 848 tfm->__crt_alg->cra_type == &crypto_givcipher_type)
735 unsigned reqsize; !! 849 return crypto_init_skcipher_ops_ablkcipher(tfm);
736 !! 850
737 reqsize = am & ~(crypto_tfm_ct !! 851 skcipher->setkey = skcipher_setkey;
738 reqsize += crypto_skcipher_ivs !! 852 skcipher->encrypt = alg->encrypt;
739 reqsize += crypto_skcipher_sta !! 853 skcipher->decrypt = alg->decrypt;
740 crypto_skcipher_set_reqsize(sk !! 854 skcipher->ivsize = alg->ivsize;
>> 855 skcipher->keysize = alg->max_keysize;
741 856
742 return crypto_init_lskcipher_o !! 857 if (skcipher->keysize)
743 } !! 858 crypto_skcipher_set_flags(skcipher, CRYPTO_TFM_NEED_KEY);
744 859
745 if (alg->exit) 860 if (alg->exit)
746 skcipher->base.exit = crypto_s 861 skcipher->base.exit = crypto_skcipher_exit_tfm;
747 862
748 if (alg->init) 863 if (alg->init)
749 return alg->init(skcipher); 864 return alg->init(skcipher);
750 865
751 return 0; 866 return 0;
752 } 867 }
753 868
754 static unsigned int crypto_skcipher_extsize(st <<
755 { <<
756 if (alg->cra_type != &crypto_skcipher_ <<
757 return sizeof(struct crypto_ls <<
758 <<
759 return crypto_alg_extsize(alg); <<
760 } <<
761 <<
762 static void crypto_skcipher_free_instance(stru 869 static void crypto_skcipher_free_instance(struct crypto_instance *inst)
763 { 870 {
764 struct skcipher_instance *skcipher = 871 struct skcipher_instance *skcipher =
765 container_of(inst, struct skci 872 container_of(inst, struct skcipher_instance, s.base);
766 873
767 skcipher->free(skcipher); 874 skcipher->free(skcipher);
768 } 875 }
769 876
770 static void crypto_skcipher_show(struct seq_fi 877 static void crypto_skcipher_show(struct seq_file *m, struct crypto_alg *alg)
771 __maybe_unused; 878 __maybe_unused;
772 static void crypto_skcipher_show(struct seq_fi 879 static void crypto_skcipher_show(struct seq_file *m, struct crypto_alg *alg)
773 { 880 {
774 struct skcipher_alg *skcipher = __cryp !! 881 struct skcipher_alg *skcipher = container_of(alg, struct skcipher_alg,
>> 882 base);
775 883
776 seq_printf(m, "type : skcipher 884 seq_printf(m, "type : skcipher\n");
777 seq_printf(m, "async : %s\n", 885 seq_printf(m, "async : %s\n",
778 alg->cra_flags & CRYPTO_ALG 886 alg->cra_flags & CRYPTO_ALG_ASYNC ? "yes" : "no");
779 seq_printf(m, "blocksize : %u\n", a 887 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
780 seq_printf(m, "min keysize : %u\n", s 888 seq_printf(m, "min keysize : %u\n", skcipher->min_keysize);
781 seq_printf(m, "max keysize : %u\n", s 889 seq_printf(m, "max keysize : %u\n", skcipher->max_keysize);
782 seq_printf(m, "ivsize : %u\n", s 890 seq_printf(m, "ivsize : %u\n", skcipher->ivsize);
783 seq_printf(m, "chunksize : %u\n", s 891 seq_printf(m, "chunksize : %u\n", skcipher->chunksize);
784 seq_printf(m, "walksize : %u\n", s 892 seq_printf(m, "walksize : %u\n", skcipher->walksize);
785 seq_printf(m, "statesize : %u\n", s <<
786 } 893 }
787 894
788 static int __maybe_unused crypto_skcipher_repo !! 895 #ifdef CONFIG_NET
789 struct sk_buff *skb, struct crypto_alg !! 896 static int crypto_skcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
790 { 897 {
791 struct skcipher_alg *skcipher = __cryp <<
792 struct crypto_report_blkcipher rblkcip 898 struct crypto_report_blkcipher rblkcipher;
>> 899 struct skcipher_alg *skcipher = container_of(alg, struct skcipher_alg,
>> 900 base);
793 901
794 memset(&rblkcipher, 0, sizeof(rblkciph !! 902 strncpy(rblkcipher.type, "skcipher", sizeof(rblkcipher.type));
795 !! 903 strncpy(rblkcipher.geniv, "<none>", sizeof(rblkcipher.geniv));
796 strscpy(rblkcipher.type, "skcipher", s <<
797 strscpy(rblkcipher.geniv, "<none>", si <<
798 904
799 rblkcipher.blocksize = alg->cra_blocks 905 rblkcipher.blocksize = alg->cra_blocksize;
800 rblkcipher.min_keysize = skcipher->min 906 rblkcipher.min_keysize = skcipher->min_keysize;
801 rblkcipher.max_keysize = skcipher->max 907 rblkcipher.max_keysize = skcipher->max_keysize;
802 rblkcipher.ivsize = skcipher->ivsize; 908 rblkcipher.ivsize = skcipher->ivsize;
803 909
804 return nla_put(skb, CRYPTOCFGA_REPORT_ !! 910 if (nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER,
805 sizeof(rblkcipher), &rb !! 911 sizeof(struct crypto_report_blkcipher), &rblkcipher))
>> 912 goto nla_put_failure;
>> 913 return 0;
>> 914
>> 915 nla_put_failure:
>> 916 return -EMSGSIZE;
>> 917 }
>> 918 #else
>> 919 static int crypto_skcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
>> 920 {
>> 921 return -ENOSYS;
806 } 922 }
>> 923 #endif
807 924
808 static const struct crypto_type crypto_skciphe !! 925 static const struct crypto_type crypto_skcipher_type2 = {
809 .extsize = crypto_skcipher_extsize, 926 .extsize = crypto_skcipher_extsize,
810 .init_tfm = crypto_skcipher_init_tfm, 927 .init_tfm = crypto_skcipher_init_tfm,
811 .free = crypto_skcipher_free_instance, 928 .free = crypto_skcipher_free_instance,
812 #ifdef CONFIG_PROC_FS 929 #ifdef CONFIG_PROC_FS
813 .show = crypto_skcipher_show, 930 .show = crypto_skcipher_show,
814 #endif 931 #endif
815 #if IS_ENABLED(CONFIG_CRYPTO_USER) <<
816 .report = crypto_skcipher_report, 932 .report = crypto_skcipher_report,
817 #endif <<
818 .maskclear = ~CRYPTO_ALG_TYPE_MASK, 933 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
819 .maskset = CRYPTO_ALG_TYPE_SKCIPHER_MA !! 934 .maskset = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
820 .type = CRYPTO_ALG_TYPE_SKCIPHER, 935 .type = CRYPTO_ALG_TYPE_SKCIPHER,
821 .tfmsize = offsetof(struct crypto_skci 936 .tfmsize = offsetof(struct crypto_skcipher, base),
822 }; 937 };
823 938
824 int crypto_grab_skcipher(struct crypto_skciphe 939 int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
825 struct crypto_instanc !! 940 const char *name, u32 type, u32 mask)
826 const char *name, u32 <<
827 { 941 {
828 spawn->base.frontend = &crypto_skciphe !! 942 spawn->base.frontend = &crypto_skcipher_type2;
829 return crypto_grab_spawn(&spawn->base, !! 943 return crypto_grab_spawn(&spawn->base, name, type, mask);
830 } 944 }
831 EXPORT_SYMBOL_GPL(crypto_grab_skcipher); 945 EXPORT_SYMBOL_GPL(crypto_grab_skcipher);
832 946
833 struct crypto_skcipher *crypto_alloc_skcipher( 947 struct crypto_skcipher *crypto_alloc_skcipher(const char *alg_name,
834 948 u32 type, u32 mask)
835 { 949 {
836 return crypto_alloc_tfm(alg_name, &cry !! 950 return crypto_alloc_tfm(alg_name, &crypto_skcipher_type2, type, mask);
837 } 951 }
838 EXPORT_SYMBOL_GPL(crypto_alloc_skcipher); 952 EXPORT_SYMBOL_GPL(crypto_alloc_skcipher);
839 953
840 struct crypto_sync_skcipher *crypto_alloc_sync !! 954 int crypto_has_skcipher2(const char *alg_name, u32 type, u32 mask)
841 const char *al <<
842 { 955 {
843 struct crypto_skcipher *tfm; !! 956 return crypto_type_has_alg(alg_name, &crypto_skcipher_type2,
844 !! 957 type, mask);
845 /* Only sync algorithms allowed. */ <<
846 mask |= CRYPTO_ALG_ASYNC | CRYPTO_ALG_ <<
847 <<
848 tfm = crypto_alloc_tfm(alg_name, &cryp <<
849 <<
850 /* <<
851 * Make sure we do not allocate someth <<
852 * an on-stack request: check the requ <<
853 */ <<
854 if (!IS_ERR(tfm) && WARN_ON(crypto_skc <<
855 MAX_SYNC_S <<
856 crypto_free_skcipher(tfm); <<
857 return ERR_PTR(-EINVAL); <<
858 } <<
859 <<
860 return (struct crypto_sync_skcipher *) <<
861 } <<
862 EXPORT_SYMBOL_GPL(crypto_alloc_sync_skcipher); <<
863 <<
864 int crypto_has_skcipher(const char *alg_name, <<
865 { <<
866 return crypto_type_has_alg(alg_name, & <<
867 } 958 }
868 EXPORT_SYMBOL_GPL(crypto_has_skcipher); !! 959 EXPORT_SYMBOL_GPL(crypto_has_skcipher2);
869 960
870 int skcipher_prepare_alg_common(struct skciphe !! 961 static int skcipher_prepare_alg(struct skcipher_alg *alg)
871 { 962 {
872 struct crypto_alg *base = &alg->base; 963 struct crypto_alg *base = &alg->base;
873 964
874 if (alg->ivsize > PAGE_SIZE / 8 || alg 965 if (alg->ivsize > PAGE_SIZE / 8 || alg->chunksize > PAGE_SIZE / 8 ||
875 alg->statesize > PAGE_SIZE / 2 || !! 966 alg->walksize > PAGE_SIZE / 8)
876 (alg->ivsize + alg->statesize) > P <<
877 return -EINVAL; 967 return -EINVAL;
878 968
879 if (!alg->chunksize) 969 if (!alg->chunksize)
880 alg->chunksize = base->cra_blo 970 alg->chunksize = base->cra_blocksize;
881 <<
882 base->cra_flags &= ~CRYPTO_ALG_TYPE_MA <<
883 <<
884 return 0; <<
885 } <<
886 <<
887 static int skcipher_prepare_alg(struct skciphe <<
888 { <<
889 struct crypto_alg *base = &alg->base; <<
890 int err; <<
891 <<
892 err = skcipher_prepare_alg_common(&alg <<
893 if (err) <<
894 return err; <<
895 <<
896 if (alg->walksize > PAGE_SIZE / 8) <<
897 return -EINVAL; <<
898 <<
899 if (!alg->walksize) 971 if (!alg->walksize)
900 alg->walksize = alg->chunksize 972 alg->walksize = alg->chunksize;
901 973
902 if (!alg->statesize) { !! 974 base->cra_type = &crypto_skcipher_type2;
903 alg->import = skcipher_noimpor !! 975 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
904 alg->export = skcipher_noexpor <<
905 } else if (!(alg->import && alg->expor <<
906 return -EINVAL; <<
907 <<
908 base->cra_type = &crypto_skcipher_type <<
909 base->cra_flags |= CRYPTO_ALG_TYPE_SKC 976 base->cra_flags |= CRYPTO_ALG_TYPE_SKCIPHER;
910 977
911 return 0; 978 return 0;
912 } 979 }
913 980
914 int crypto_register_skcipher(struct skcipher_a 981 int crypto_register_skcipher(struct skcipher_alg *alg)
915 { 982 {
916 struct crypto_alg *base = &alg->base; 983 struct crypto_alg *base = &alg->base;
917 int err; 984 int err;
918 985
919 err = skcipher_prepare_alg(alg); 986 err = skcipher_prepare_alg(alg);
920 if (err) 987 if (err)
921 return err; 988 return err;
922 989
923 return crypto_register_alg(base); 990 return crypto_register_alg(base);
924 } 991 }
925 EXPORT_SYMBOL_GPL(crypto_register_skcipher); 992 EXPORT_SYMBOL_GPL(crypto_register_skcipher);
926 993
927 void crypto_unregister_skcipher(struct skciphe 994 void crypto_unregister_skcipher(struct skcipher_alg *alg)
928 { 995 {
929 crypto_unregister_alg(&alg->base); 996 crypto_unregister_alg(&alg->base);
930 } 997 }
931 EXPORT_SYMBOL_GPL(crypto_unregister_skcipher); 998 EXPORT_SYMBOL_GPL(crypto_unregister_skcipher);
932 999
933 int crypto_register_skciphers(struct skcipher_ 1000 int crypto_register_skciphers(struct skcipher_alg *algs, int count)
934 { 1001 {
935 int i, ret; 1002 int i, ret;
936 1003
937 for (i = 0; i < count; i++) { 1004 for (i = 0; i < count; i++) {
938 ret = crypto_register_skcipher 1005 ret = crypto_register_skcipher(&algs[i]);
939 if (ret) 1006 if (ret)
940 goto err; 1007 goto err;
941 } 1008 }
942 1009
943 return 0; 1010 return 0;
944 1011
945 err: 1012 err:
946 for (--i; i >= 0; --i) 1013 for (--i; i >= 0; --i)
947 crypto_unregister_skcipher(&al 1014 crypto_unregister_skcipher(&algs[i]);
948 1015
949 return ret; 1016 return ret;
950 } 1017 }
951 EXPORT_SYMBOL_GPL(crypto_register_skciphers); 1018 EXPORT_SYMBOL_GPL(crypto_register_skciphers);
952 1019
953 void crypto_unregister_skciphers(struct skciph 1020 void crypto_unregister_skciphers(struct skcipher_alg *algs, int count)
954 { 1021 {
955 int i; 1022 int i;
956 1023
957 for (i = count - 1; i >= 0; --i) 1024 for (i = count - 1; i >= 0; --i)
958 crypto_unregister_skcipher(&al 1025 crypto_unregister_skcipher(&algs[i]);
959 } 1026 }
960 EXPORT_SYMBOL_GPL(crypto_unregister_skciphers) 1027 EXPORT_SYMBOL_GPL(crypto_unregister_skciphers);
961 1028
962 int skcipher_register_instance(struct crypto_t 1029 int skcipher_register_instance(struct crypto_template *tmpl,
963 struct skcipher_ins 1030 struct skcipher_instance *inst)
964 { 1031 {
965 int err; 1032 int err;
966 1033
967 if (WARN_ON(!inst->free)) <<
968 return -EINVAL; <<
969 <<
970 err = skcipher_prepare_alg(&inst->alg) 1034 err = skcipher_prepare_alg(&inst->alg);
971 if (err) 1035 if (err)
972 return err; 1036 return err;
973 1037
974 return crypto_register_instance(tmpl, 1038 return crypto_register_instance(tmpl, skcipher_crypto_instance(inst));
975 } 1039 }
976 EXPORT_SYMBOL_GPL(skcipher_register_instance); 1040 EXPORT_SYMBOL_GPL(skcipher_register_instance);
977 1041
978 static int skcipher_setkey_simple(struct crypt <<
979 unsigned int <<
980 { <<
981 struct crypto_cipher *cipher = skciphe <<
982 <<
983 crypto_cipher_clear_flags(cipher, CRYP <<
984 crypto_cipher_set_flags(cipher, crypto <<
985 CRYPTO_TFM_REQ <<
986 return crypto_cipher_setkey(cipher, ke <<
987 } <<
988 <<
989 static int skcipher_init_tfm_simple(struct cry <<
990 { <<
991 struct skcipher_instance *inst = skcip <<
992 struct crypto_cipher_spawn *spawn = sk <<
993 struct skcipher_ctx_simple *ctx = cryp <<
994 struct crypto_cipher *cipher; <<
995 <<
996 cipher = crypto_spawn_cipher(spawn); <<
997 if (IS_ERR(cipher)) <<
998 return PTR_ERR(cipher); <<
999 <<
1000 ctx->cipher = cipher; <<
1001 return 0; <<
1002 } <<
1003 <<
1004 static void skcipher_exit_tfm_simple(struct c <<
1005 { <<
1006 struct skcipher_ctx_simple *ctx = cry <<
1007 <<
1008 crypto_free_cipher(ctx->cipher); <<
1009 } <<
1010 <<
1011 static void skcipher_free_instance_simple(str <<
1012 { <<
1013 crypto_drop_cipher(skcipher_instance_ <<
1014 kfree(inst); <<
1015 } <<
1016 <<
1017 /** <<
1018 * skcipher_alloc_instance_simple - allocate <<
1019 * <<
1020 * Allocate an skcipher_instance for a simple <<
1021 * e.g. cbc or ecb. The instance context wil <<
1022 * that for the underlying cipher. The {min, <<
1023 * alignmask, and priority are set from the u <<
1024 * overridden if needed. The tfm context def <<
1025 * default ->setkey(), ->init(), and ->exit() <<
1026 * <<
1027 * @tmpl: the template being instantiated <<
1028 * @tb: the template parameters <<
1029 * <<
1030 * Return: a pointer to the new instance, or <<
1031 * needs to register the instance. <<
1032 */ <<
1033 struct skcipher_instance *skcipher_alloc_inst <<
1034 struct crypto_template *tmpl, struct <<
1035 { <<
1036 u32 mask; <<
1037 struct skcipher_instance *inst; <<
1038 struct crypto_cipher_spawn *spawn; <<
1039 struct crypto_alg *cipher_alg; <<
1040 int err; <<
1041 <<
1042 err = crypto_check_attr_type(tb, CRYP <<
1043 if (err) <<
1044 return ERR_PTR(err); <<
1045 <<
1046 inst = kzalloc(sizeof(*inst) + sizeof <<
1047 if (!inst) <<
1048 return ERR_PTR(-ENOMEM); <<
1049 spawn = skcipher_instance_ctx(inst); <<
1050 <<
1051 err = crypto_grab_cipher(spawn, skcip <<
1052 crypto_attr_ <<
1053 if (err) <<
1054 goto err_free_inst; <<
1055 cipher_alg = crypto_spawn_cipher_alg( <<
1056 <<
1057 err = crypto_inst_setname(skcipher_cr <<
1058 cipher_alg) <<
1059 if (err) <<
1060 goto err_free_inst; <<
1061 <<
1062 inst->free = skcipher_free_instance_s <<
1063 <<
1064 /* Default algorithm properties, can <<
1065 inst->alg.base.cra_blocksize = cipher <<
1066 inst->alg.base.cra_alignmask = cipher <<
1067 inst->alg.base.cra_priority = cipher_ <<
1068 inst->alg.min_keysize = cipher_alg->c <<
1069 inst->alg.max_keysize = cipher_alg->c <<
1070 inst->alg.ivsize = cipher_alg->cra_bl <<
1071 <<
1072 /* Use skcipher_ctx_simple by default <<
1073 inst->alg.base.cra_ctxsize = sizeof(s <<
1074 inst->alg.setkey = skcipher_setkey_si <<
1075 inst->alg.init = skcipher_init_tfm_si <<
1076 inst->alg.exit = skcipher_exit_tfm_si <<
1077 <<
1078 return inst; <<
1079 <<
1080 err_free_inst: <<
1081 skcipher_free_instance_simple(inst); <<
1082 return ERR_PTR(err); <<
1083 } <<
1084 EXPORT_SYMBOL_GPL(skcipher_alloc_instance_sim <<
1085 <<
1086 MODULE_LICENSE("GPL"); 1042 MODULE_LICENSE("GPL");
1087 MODULE_DESCRIPTION("Symmetric key cipher type 1043 MODULE_DESCRIPTION("Symmetric key cipher type");
1088 MODULE_IMPORT_NS(CRYPTO_INTERNAL); <<
1089 1044
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.