1 /* 1 /*
2 * Key Wrapping: RFC3394 / NIST SP800-38F 2 * Key Wrapping: RFC3394 / NIST SP800-38F
3 * 3 *
4 * Copyright (C) 2015, Stephan Mueller <smuell 4 * Copyright (C) 2015, Stephan Mueller <smueller@chronox.de>
5 * 5 *
6 * Redistribution and use in source and binary 6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that t 7 * modification, are permitted provided that the following conditions
8 * are met: 8 * are met:
9 * 1. Redistributions of source code must reta 9 * 1. Redistributions of source code must retain the above copyright
10 * notice, and the entire permission notice 10 * notice, and the entire permission notice in its entirety,
11 * including the disclaimer of warranties. 11 * including the disclaimer of warranties.
12 * 2. Redistributions in binary form must repr 12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the 13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials pro 14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used t 15 * 3. The name of the author may not be used to endorse or promote
16 * products derived from this software with 16 * products derived from this software without specific prior
17 * written permission. 17 * written permission.
18 * 18 *
19 * ALTERNATIVELY, this product may be distribu 19 * ALTERNATIVELY, this product may be distributed under the terms of
20 * the GNU General Public License, in which ca 20 * the GNU General Public License, in which case the provisions of the GPL2
21 * are required INSTEAD OF the above restricti 21 * are required INSTEAD OF the above restrictions. (This clause is
22 * necessary due to a potential bad interactio 22 * necessary due to a potential bad interaction between the GPL and
23 * the restrictions contained in a BSD-style c 23 * the restrictions contained in a BSD-style copyright.)
24 * 24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTIC 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
28 * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT S 28 * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL 29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT L 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
31 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF US 31 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND O 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIAB 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
35 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED O 35 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
36 * DAMAGE. 36 * DAMAGE.
37 */ 37 */
38 38
39 /* 39 /*
40 * Note for using key wrapping: 40 * Note for using key wrapping:
41 * 41 *
42 * * The result of the encryption operati 42 * * The result of the encryption operation is the ciphertext starting
43 * with the 2nd semiblock. The first se 43 * with the 2nd semiblock. The first semiblock is provided as the IV.
44 * The IV used to start the encryption 44 * The IV used to start the encryption operation is the default IV.
45 * 45 *
46 * * The input for the decryption is the 46 * * The input for the decryption is the first semiblock handed in as an
47 * IV. The ciphertext is the data start 47 * IV. The ciphertext is the data starting with the 2nd semiblock. The
48 * return code of the decryption operat 48 * return code of the decryption operation will be EBADMSG in case an
49 * integrity error occurs. 49 * integrity error occurs.
50 * 50 *
51 * To obtain the full result of an encryption 51 * To obtain the full result of an encryption as expected by SP800-38F, the
52 * caller must allocate a buffer of plaintext 52 * caller must allocate a buffer of plaintext + 8 bytes:
53 * 53 *
54 * unsigned int datalen = ptlen + crypto_ 54 * unsigned int datalen = ptlen + crypto_skcipher_ivsize(tfm);
55 * u8 data[datalen]; 55 * u8 data[datalen];
56 * u8 *iv = data; 56 * u8 *iv = data;
57 * u8 *pt = data + crypto_skcipher_ivsize 57 * u8 *pt = data + crypto_skcipher_ivsize(tfm);
58 * <ensure that pt contains the p 58 * <ensure that pt contains the plaintext of size ptlen>
59 * sg_init_one(&sg, pt, ptlen); !! 59 * sg_init_one(&sg, ptdata, ptlen);
60 * skcipher_request_set_crypt(req, &sg, & 60 * skcipher_request_set_crypt(req, &sg, &sg, ptlen, iv);
61 * 61 *
62 * ==> After encryption, data now contain 62 * ==> After encryption, data now contains full KW result as per SP800-38F.
63 * 63 *
64 * In case of decryption, ciphertext now alrea 64 * In case of decryption, ciphertext now already has the expected length
65 * and must be segmented appropriately: 65 * and must be segmented appropriately:
66 * 66 *
67 * unsigned int datalen = CTLEN; 67 * unsigned int datalen = CTLEN;
68 * u8 data[datalen]; 68 * u8 data[datalen];
69 * <ensure that data contains ful 69 * <ensure that data contains full ciphertext>
70 * u8 *iv = data; 70 * u8 *iv = data;
71 * u8 *ct = data + crypto_skcipher_ivsize 71 * u8 *ct = data + crypto_skcipher_ivsize(tfm);
72 * unsigned int ctlen = datalen - crypto_ 72 * unsigned int ctlen = datalen - crypto_skcipher_ivsize(tfm);
73 * sg_init_one(&sg, ct, ctlen); !! 73 * sg_init_one(&sg, ctdata, ctlen);
74 * skcipher_request_set_crypt(req, &sg, & !! 74 * skcipher_request_set_crypt(req, &sg, &sg, ptlen, iv);
75 * 75 *
76 * ==> After decryption (which hopefully 76 * ==> After decryption (which hopefully does not return EBADMSG), the ct
77 * pointer now points to the plaintext of 77 * pointer now points to the plaintext of size ctlen.
78 * 78 *
79 * Note 2: KWP is not implemented as this woul 79 * Note 2: KWP is not implemented as this would defy in-place operation.
80 * If somebody wants to wrap non-align 80 * If somebody wants to wrap non-aligned data, he should simply pad
81 * the input with zeros to fill it up 81 * the input with zeros to fill it up to the 8 byte boundary.
82 */ 82 */
83 83
84 #include <linux/module.h> 84 #include <linux/module.h>
85 #include <linux/crypto.h> 85 #include <linux/crypto.h>
86 #include <linux/scatterlist.h> 86 #include <linux/scatterlist.h>
87 #include <crypto/scatterwalk.h> 87 #include <crypto/scatterwalk.h>
88 #include <crypto/internal/cipher.h> <<
89 #include <crypto/internal/skcipher.h> 88 #include <crypto/internal/skcipher.h>
90 89
>> 90 struct crypto_kw_ctx {
>> 91 struct crypto_cipher *child;
>> 92 };
>> 93
91 struct crypto_kw_block { 94 struct crypto_kw_block {
92 #define SEMIBSIZE 8 95 #define SEMIBSIZE 8
93 __be64 A; !! 96 u8 A[SEMIBSIZE];
94 __be64 R; !! 97 u8 R[SEMIBSIZE];
95 }; 98 };
96 99
>> 100 /* convert 64 bit integer into its string representation */
>> 101 static inline void crypto_kw_cpu_to_be64(u64 val, u8 *buf)
>> 102 {
>> 103 __be64 *a = (__be64 *)buf;
>> 104
>> 105 *a = cpu_to_be64(val);
>> 106 }
>> 107
97 /* 108 /*
98 * Fast forward the SGL to the "end" length mi 109 * Fast forward the SGL to the "end" length minus SEMIBSIZE.
99 * The start in the SGL defined by the fast-fo 110 * The start in the SGL defined by the fast-forward is returned with
100 * the walk variable 111 * the walk variable
101 */ 112 */
102 static void crypto_kw_scatterlist_ff(struct sc 113 static void crypto_kw_scatterlist_ff(struct scatter_walk *walk,
103 struct sc 114 struct scatterlist *sg,
104 unsigned 115 unsigned int end)
105 { 116 {
106 unsigned int skip = 0; 117 unsigned int skip = 0;
107 118
108 /* The caller should only operate on f 119 /* The caller should only operate on full SEMIBLOCKs. */
109 BUG_ON(end < SEMIBSIZE); 120 BUG_ON(end < SEMIBSIZE);
110 121
111 skip = end - SEMIBSIZE; 122 skip = end - SEMIBSIZE;
112 while (sg) { 123 while (sg) {
113 if (sg->length > skip) { 124 if (sg->length > skip) {
114 scatterwalk_start(walk 125 scatterwalk_start(walk, sg);
115 scatterwalk_advance(wa 126 scatterwalk_advance(walk, skip);
116 break; 127 break;
117 } !! 128 } else
>> 129 skip -= sg->length;
118 130
119 skip -= sg->length; <<
120 sg = sg_next(sg); 131 sg = sg_next(sg);
121 } 132 }
122 } 133 }
123 134
124 static int crypto_kw_decrypt(struct skcipher_r !! 135 static int crypto_kw_decrypt(struct blkcipher_desc *desc,
>> 136 struct scatterlist *dst, struct scatterlist *src,
>> 137 unsigned int nbytes)
125 { 138 {
126 struct crypto_skcipher *tfm = crypto_s !! 139 struct crypto_blkcipher *tfm = desc->tfm;
127 struct crypto_cipher *cipher = skciphe !! 140 struct crypto_kw_ctx *ctx = crypto_blkcipher_ctx(tfm);
128 struct crypto_kw_block block; !! 141 struct crypto_cipher *child = ctx->child;
129 struct scatterlist *src, *dst; !! 142
130 u64 t = 6 * ((req->cryptlen) >> 3); !! 143 unsigned long alignmask = max_t(unsigned long, SEMIBSIZE,
>> 144 crypto_cipher_alignmask(child));
131 unsigned int i; 145 unsigned int i;
>> 146
>> 147 u8 blockbuf[sizeof(struct crypto_kw_block) + alignmask];
>> 148 struct crypto_kw_block *block = (struct crypto_kw_block *)
>> 149 PTR_ALIGN(blockbuf + 0, alignmask + 1);
>> 150
>> 151 u64 t = 6 * ((nbytes) >> 3);
>> 152 struct scatterlist *lsrc, *ldst;
132 int ret = 0; 153 int ret = 0;
133 154
134 /* 155 /*
135 * Require at least 2 semiblocks (note 156 * Require at least 2 semiblocks (note, the 3rd semiblock that is
136 * required by SP800-38F is the IV. 157 * required by SP800-38F is the IV.
137 */ 158 */
138 if (req->cryptlen < (2 * SEMIBSIZE) || !! 159 if (nbytes < (2 * SEMIBSIZE) || nbytes % SEMIBSIZE)
139 return -EINVAL; 160 return -EINVAL;
140 161
141 /* Place the IV into block A */ 162 /* Place the IV into block A */
142 memcpy(&block.A, req->iv, SEMIBSIZE); !! 163 memcpy(block->A, desc->info, SEMIBSIZE);
143 164
144 /* 165 /*
145 * src scatterlist is read-only. dst s 166 * src scatterlist is read-only. dst scatterlist is r/w. During the
146 * first loop, src points to req->src !! 167 * first loop, lsrc points to src and ldst to dst. For any
147 * subsequent round, the code operates !! 168 * subsequent round, the code operates on dst only.
148 */ 169 */
149 src = req->src; !! 170 lsrc = src;
150 dst = req->dst; !! 171 ldst = dst;
151 172
152 for (i = 0; i < 6; i++) { 173 for (i = 0; i < 6; i++) {
>> 174 u8 tbe_buffer[SEMIBSIZE + alignmask];
>> 175 /* alignment for the crypto_xor and the _to_be64 operation */
>> 176 u8 *tbe = PTR_ALIGN(tbe_buffer + 0, alignmask + 1);
>> 177 unsigned int tmp_nbytes = nbytes;
153 struct scatter_walk src_walk, 178 struct scatter_walk src_walk, dst_walk;
154 unsigned int nbytes = req->cry <<
155 179
156 while (nbytes) { !! 180 while (tmp_nbytes) {
157 /* move pointer by nby !! 181 /* move pointer by tmp_nbytes in the SGL */
158 crypto_kw_scatterlist_ !! 182 crypto_kw_scatterlist_ff(&src_walk, lsrc, tmp_nbytes);
159 /* get the source bloc 183 /* get the source block */
160 scatterwalk_copychunks !! 184 scatterwalk_copychunks(block->R, &src_walk, SEMIBSIZE,
161 185 false);
162 186
>> 187 /* perform KW operation: get counter as byte string */
>> 188 crypto_kw_cpu_to_be64(t, tbe);
163 /* perform KW operatio 189 /* perform KW operation: modify IV with counter */
164 block.A ^= cpu_to_be64 !! 190 crypto_xor(block->A, tbe, SEMIBSIZE);
165 t--; 191 t--;
166 /* perform KW operatio 192 /* perform KW operation: decrypt block */
167 crypto_cipher_decrypt_ !! 193 crypto_cipher_decrypt_one(child, (u8*)block,
168 !! 194 (u8*)block);
169 195
170 /* move pointer by nby !! 196 /* move pointer by tmp_nbytes in the SGL */
171 crypto_kw_scatterlist_ !! 197 crypto_kw_scatterlist_ff(&dst_walk, ldst, tmp_nbytes);
172 /* Copy block->R into 198 /* Copy block->R into place */
173 scatterwalk_copychunks !! 199 scatterwalk_copychunks(block->R, &dst_walk, SEMIBSIZE,
174 200 true);
175 201
176 nbytes -= SEMIBSIZE; !! 202 tmp_nbytes -= SEMIBSIZE;
177 } 203 }
178 204
179 /* we now start to operate on 205 /* we now start to operate on the dst SGL only */
180 src = req->dst; !! 206 lsrc = dst;
181 dst = req->dst; !! 207 ldst = dst;
182 } 208 }
183 209
184 /* Perform authentication check */ 210 /* Perform authentication check */
185 if (block.A != cpu_to_be64(0xa6a6a6a6a !! 211 if (crypto_memneq("\xA6\xA6\xA6\xA6\xA6\xA6\xA6\xA6", block->A,
>> 212 SEMIBSIZE))
186 ret = -EBADMSG; 213 ret = -EBADMSG;
187 214
188 memzero_explicit(&block, sizeof(struct !! 215 memzero_explicit(block, sizeof(struct crypto_kw_block));
189 216
190 return ret; 217 return ret;
191 } 218 }
192 219
193 static int crypto_kw_encrypt(struct skcipher_r !! 220 static int crypto_kw_encrypt(struct blkcipher_desc *desc,
>> 221 struct scatterlist *dst, struct scatterlist *src,
>> 222 unsigned int nbytes)
194 { 223 {
195 struct crypto_skcipher *tfm = crypto_s !! 224 struct crypto_blkcipher *tfm = desc->tfm;
196 struct crypto_cipher *cipher = skciphe !! 225 struct crypto_kw_ctx *ctx = crypto_blkcipher_ctx(tfm);
197 struct crypto_kw_block block; !! 226 struct crypto_cipher *child = ctx->child;
198 struct scatterlist *src, *dst; !! 227
199 u64 t = 1; !! 228 unsigned long alignmask = max_t(unsigned long, SEMIBSIZE,
>> 229 crypto_cipher_alignmask(child));
200 unsigned int i; 230 unsigned int i;
201 231
>> 232 u8 blockbuf[sizeof(struct crypto_kw_block) + alignmask];
>> 233 struct crypto_kw_block *block = (struct crypto_kw_block *)
>> 234 PTR_ALIGN(blockbuf + 0, alignmask + 1);
>> 235
>> 236 u64 t = 1;
>> 237 struct scatterlist *lsrc, *ldst;
>> 238
202 /* 239 /*
203 * Require at least 2 semiblocks (note 240 * Require at least 2 semiblocks (note, the 3rd semiblock that is
204 * required by SP800-38F is the IV tha 241 * required by SP800-38F is the IV that occupies the first semiblock.
205 * This means that the dst memory must 242 * This means that the dst memory must be one semiblock larger than src.
206 * Also ensure that the given data is 243 * Also ensure that the given data is aligned to semiblock.
207 */ 244 */
208 if (req->cryptlen < (2 * SEMIBSIZE) || !! 245 if (nbytes < (2 * SEMIBSIZE) || nbytes % SEMIBSIZE)
209 return -EINVAL; 246 return -EINVAL;
210 247
211 /* 248 /*
212 * Place the predefined IV into block 249 * Place the predefined IV into block A -- for encrypt, the caller
213 * does not need to provide an IV, but 250 * does not need to provide an IV, but he needs to fetch the final IV.
214 */ 251 */
215 block.A = cpu_to_be64(0xa6a6a6a6a6a6a6 !! 252 memcpy(block->A, "\xA6\xA6\xA6\xA6\xA6\xA6\xA6\xA6", SEMIBSIZE);
216 253
217 /* 254 /*
218 * src scatterlist is read-only. dst s 255 * src scatterlist is read-only. dst scatterlist is r/w. During the
219 * first loop, src points to req->src !! 256 * first loop, lsrc points to src and ldst to dst. For any
220 * subsequent round, the code operates !! 257 * subsequent round, the code operates on dst only.
221 */ 258 */
222 src = req->src; !! 259 lsrc = src;
223 dst = req->dst; !! 260 ldst = dst;
224 261
225 for (i = 0; i < 6; i++) { 262 for (i = 0; i < 6; i++) {
>> 263 u8 tbe_buffer[SEMIBSIZE + alignmask];
>> 264 u8 *tbe = PTR_ALIGN(tbe_buffer + 0, alignmask + 1);
>> 265 unsigned int tmp_nbytes = nbytes;
226 struct scatter_walk src_walk, 266 struct scatter_walk src_walk, dst_walk;
227 unsigned int nbytes = req->cry <<
228 267
229 scatterwalk_start(&src_walk, s !! 268 scatterwalk_start(&src_walk, lsrc);
230 scatterwalk_start(&dst_walk, d !! 269 scatterwalk_start(&dst_walk, ldst);
231 270
232 while (nbytes) { !! 271 while (tmp_nbytes) {
233 /* get the source bloc 272 /* get the source block */
234 scatterwalk_copychunks !! 273 scatterwalk_copychunks(block->R, &src_walk, SEMIBSIZE,
235 274 false);
236 275
237 /* perform KW operatio 276 /* perform KW operation: encrypt block */
238 crypto_cipher_encrypt_ !! 277 crypto_cipher_encrypt_one(child, (u8 *)block,
239 !! 278 (u8 *)block);
>> 279 /* perform KW operation: get counter as byte string */
>> 280 crypto_kw_cpu_to_be64(t, tbe);
240 /* perform KW operatio 281 /* perform KW operation: modify IV with counter */
241 block.A ^= cpu_to_be64 !! 282 crypto_xor(block->A, tbe, SEMIBSIZE);
242 t++; 283 t++;
243 284
244 /* Copy block->R into 285 /* Copy block->R into place */
245 scatterwalk_copychunks !! 286 scatterwalk_copychunks(block->R, &dst_walk, SEMIBSIZE,
246 287 true);
247 288
248 nbytes -= SEMIBSIZE; !! 289 tmp_nbytes -= SEMIBSIZE;
249 } 290 }
250 291
251 /* we now start to operate on 292 /* we now start to operate on the dst SGL only */
252 src = req->dst; !! 293 lsrc = dst;
253 dst = req->dst; !! 294 ldst = dst;
254 } 295 }
255 296
256 /* establish the IV for the caller to 297 /* establish the IV for the caller to pick up */
257 memcpy(req->iv, &block.A, SEMIBSIZE); !! 298 memcpy(desc->info, block->A, SEMIBSIZE);
258 299
259 memzero_explicit(&block, sizeof(struct !! 300 memzero_explicit(block, sizeof(struct crypto_kw_block));
260 301
261 return 0; 302 return 0;
262 } 303 }
263 304
264 static int crypto_kw_create(struct crypto_temp !! 305 static int crypto_kw_setkey(struct crypto_tfm *parent, const u8 *key,
>> 306 unsigned int keylen)
265 { 307 {
266 struct skcipher_instance *inst; !! 308 struct crypto_kw_ctx *ctx = crypto_tfm_ctx(parent);
267 struct crypto_alg *alg; !! 309 struct crypto_cipher *child = ctx->child;
268 int err; 310 int err;
269 311
270 inst = skcipher_alloc_instance_simple( !! 312 crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
271 if (IS_ERR(inst)) !! 313 crypto_cipher_set_flags(child, crypto_tfm_get_flags(parent) &
272 return PTR_ERR(inst); !! 314 CRYPTO_TFM_REQ_MASK);
>> 315 err = crypto_cipher_setkey(child, key, keylen);
>> 316 crypto_tfm_set_flags(parent, crypto_cipher_get_flags(child) &
>> 317 CRYPTO_TFM_RES_MASK);
>> 318 return err;
>> 319 }
273 320
274 alg = skcipher_ialg_simple(inst); !! 321 static int crypto_kw_init_tfm(struct crypto_tfm *tfm)
>> 322 {
>> 323 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
>> 324 struct crypto_spawn *spawn = crypto_instance_ctx(inst);
>> 325 struct crypto_kw_ctx *ctx = crypto_tfm_ctx(tfm);
>> 326 struct crypto_cipher *cipher;
>> 327
>> 328 cipher = crypto_spawn_cipher(spawn);
>> 329 if (IS_ERR(cipher))
>> 330 return PTR_ERR(cipher);
>> 331
>> 332 ctx->child = cipher;
>> 333 return 0;
>> 334 }
>> 335
>> 336 static void crypto_kw_exit_tfm(struct crypto_tfm *tfm)
>> 337 {
>> 338 struct crypto_kw_ctx *ctx = crypto_tfm_ctx(tfm);
>> 339
>> 340 crypto_free_cipher(ctx->child);
>> 341 }
>> 342
>> 343 static struct crypto_instance *crypto_kw_alloc(struct rtattr **tb)
>> 344 {
>> 345 struct crypto_instance *inst = NULL;
>> 346 struct crypto_alg *alg = NULL;
>> 347 int err;
>> 348
>> 349 err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_BLKCIPHER);
>> 350 if (err)
>> 351 return ERR_PTR(err);
>> 352
>> 353 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
>> 354 CRYPTO_ALG_TYPE_MASK);
>> 355 if (IS_ERR(alg))
>> 356 return ERR_CAST(alg);
275 357
276 err = -EINVAL; !! 358 inst = ERR_PTR(-EINVAL);
277 /* Section 5.1 requirement for KW */ 359 /* Section 5.1 requirement for KW */
278 if (alg->cra_blocksize != sizeof(struc 360 if (alg->cra_blocksize != sizeof(struct crypto_kw_block))
279 goto out_free_inst; !! 361 goto err;
280 362
281 inst->alg.base.cra_blocksize = SEMIBSI !! 363 inst = crypto_alloc_instance("kw", alg);
282 inst->alg.base.cra_alignmask = 0; !! 364 if (IS_ERR(inst))
283 inst->alg.ivsize = SEMIBSIZE; !! 365 goto err;
284 <<
285 inst->alg.encrypt = crypto_kw_encrypt; <<
286 inst->alg.decrypt = crypto_kw_decrypt; <<
287 <<
288 err = skcipher_register_instance(tmpl, <<
289 if (err) { <<
290 out_free_inst: <<
291 inst->free(inst); <<
292 } <<
293 366
294 return err; !! 367 inst->alg.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER;
>> 368 inst->alg.cra_priority = alg->cra_priority;
>> 369 inst->alg.cra_blocksize = SEMIBSIZE;
>> 370 inst->alg.cra_alignmask = 0;
>> 371 inst->alg.cra_type = &crypto_blkcipher_type;
>> 372 inst->alg.cra_blkcipher.ivsize = SEMIBSIZE;
>> 373 inst->alg.cra_blkcipher.min_keysize = alg->cra_cipher.cia_min_keysize;
>> 374 inst->alg.cra_blkcipher.max_keysize = alg->cra_cipher.cia_max_keysize;
>> 375
>> 376 inst->alg.cra_ctxsize = sizeof(struct crypto_kw_ctx);
>> 377
>> 378 inst->alg.cra_init = crypto_kw_init_tfm;
>> 379 inst->alg.cra_exit = crypto_kw_exit_tfm;
>> 380
>> 381 inst->alg.cra_blkcipher.setkey = crypto_kw_setkey;
>> 382 inst->alg.cra_blkcipher.encrypt = crypto_kw_encrypt;
>> 383 inst->alg.cra_blkcipher.decrypt = crypto_kw_decrypt;
>> 384
>> 385 err:
>> 386 crypto_mod_put(alg);
>> 387 return inst;
>> 388 }
>> 389
>> 390 static void crypto_kw_free(struct crypto_instance *inst)
>> 391 {
>> 392 crypto_drop_spawn(crypto_instance_ctx(inst));
>> 393 kfree(inst);
295 } 394 }
296 395
297 static struct crypto_template crypto_kw_tmpl = 396 static struct crypto_template crypto_kw_tmpl = {
298 .name = "kw", 397 .name = "kw",
299 .create = crypto_kw_create, !! 398 .alloc = crypto_kw_alloc,
>> 399 .free = crypto_kw_free,
300 .module = THIS_MODULE, 400 .module = THIS_MODULE,
301 }; 401 };
302 402
303 static int __init crypto_kw_init(void) 403 static int __init crypto_kw_init(void)
304 { 404 {
305 return crypto_register_template(&crypt 405 return crypto_register_template(&crypto_kw_tmpl);
306 } 406 }
307 407
308 static void __exit crypto_kw_exit(void) 408 static void __exit crypto_kw_exit(void)
309 { 409 {
310 crypto_unregister_template(&crypto_kw_ 410 crypto_unregister_template(&crypto_kw_tmpl);
311 } 411 }
312 412
313 subsys_initcall(crypto_kw_init); !! 413 module_init(crypto_kw_init);
314 module_exit(crypto_kw_exit); 414 module_exit(crypto_kw_exit);
315 415
316 MODULE_LICENSE("Dual BSD/GPL"); 416 MODULE_LICENSE("Dual BSD/GPL");
317 MODULE_AUTHOR("Stephan Mueller <smueller@chron 417 MODULE_AUTHOR("Stephan Mueller <smueller@chronox.de>");
318 MODULE_DESCRIPTION("Key Wrapping (RFC3394 / NI 418 MODULE_DESCRIPTION("Key Wrapping (RFC3394 / NIST SP800-38F)");
319 MODULE_ALIAS_CRYPTO("kw"); 419 MODULE_ALIAS_CRYPTO("kw");
320 MODULE_IMPORT_NS(CRYPTO_INTERNAL); <<
321 420
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