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