Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
c1e26e1e | 4 | * s390 implementation of the DES Cipher Algorithm. |
1da177e4 | 5 | * |
a53c8fab | 6 | * Copyright IBM Corp. 2003, 2011 |
86aa9fc2 JG |
7 | * Author(s): Thomas Spatzier |
8 | * Jan Glauber (jan.glauber@de.ibm.com) | |
1da177e4 LT |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | */ | |
a9e62fad | 16 | |
1da177e4 LT |
17 | #include <linux/init.h> |
18 | #include <linux/module.h> | |
1efbd15c JG |
19 | #include <linux/crypto.h> |
20 | #include <crypto/algapi.h> | |
21 | #include <crypto/des.h> | |
c1357833 | 22 | |
c1e26e1e | 23 | #include "crypt_s390.h" |
1da177e4 | 24 | |
98971f84 | 25 | #define DES3_KEY_SIZE (3 * DES_KEY_SIZE) |
1da177e4 | 26 | |
0200f3ec | 27 | static u8 *ctrblk; |
ee97dc7d | 28 | static DEFINE_SPINLOCK(ctrblk_lock); |
0200f3ec | 29 | |
98971f84 | 30 | struct s390_des_ctx { |
1da177e4 | 31 | u8 iv[DES_BLOCK_SIZE]; |
98971f84 | 32 | u8 key[DES3_KEY_SIZE]; |
1da177e4 LT |
33 | }; |
34 | ||
6c2bb98b | 35 | static int des_setkey(struct crypto_tfm *tfm, const u8 *key, |
98971f84 | 36 | unsigned int key_len) |
1da177e4 | 37 | { |
98971f84 | 38 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
560c06ae | 39 | u32 *flags = &tfm->crt_flags; |
1efbd15c | 40 | u32 tmp[DES_EXPKEY_WORDS]; |
1da177e4 | 41 | |
1efbd15c JG |
42 | /* check for weak keys */ |
43 | if (!des_ekey(tmp, key) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) { | |
44 | *flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
45 | return -EINVAL; | |
46 | } | |
47 | ||
98971f84 | 48 | memcpy(ctx->key, key, key_len); |
1efbd15c | 49 | return 0; |
1da177e4 LT |
50 | } |
51 | ||
6c2bb98b | 52 | static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
1da177e4 | 53 | { |
98971f84 | 54 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
1da177e4 | 55 | |
98971f84 | 56 | crypt_s390_km(KM_DEA_ENCRYPT, ctx->key, out, in, DES_BLOCK_SIZE); |
1da177e4 LT |
57 | } |
58 | ||
6c2bb98b | 59 | static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
1da177e4 | 60 | { |
98971f84 | 61 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
1da177e4 | 62 | |
98971f84 | 63 | crypt_s390_km(KM_DEA_DECRYPT, ctx->key, out, in, DES_BLOCK_SIZE); |
b8dc6038 JG |
64 | } |
65 | ||
1da177e4 LT |
66 | static struct crypto_alg des_alg = { |
67 | .cra_name = "des", | |
65b75c36 HX |
68 | .cra_driver_name = "des-s390", |
69 | .cra_priority = CRYPT_S390_PRIORITY, | |
1da177e4 LT |
70 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
71 | .cra_blocksize = DES_BLOCK_SIZE, | |
98971f84 | 72 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
1da177e4 | 73 | .cra_module = THIS_MODULE, |
c1357833 JG |
74 | .cra_u = { |
75 | .cipher = { | |
76 | .cia_min_keysize = DES_KEY_SIZE, | |
77 | .cia_max_keysize = DES_KEY_SIZE, | |
78 | .cia_setkey = des_setkey, | |
79 | .cia_encrypt = des_encrypt, | |
b8dc6038 | 80 | .cia_decrypt = des_decrypt, |
c1357833 JG |
81 | } |
82 | } | |
1da177e4 LT |
83 | }; |
84 | ||
a9e62fad | 85 | static int ecb_desall_crypt(struct blkcipher_desc *desc, long func, |
98971f84 | 86 | u8 *key, struct blkcipher_walk *walk) |
a9e62fad HX |
87 | { |
88 | int ret = blkcipher_walk_virt(desc, walk); | |
89 | unsigned int nbytes; | |
90 | ||
91 | while ((nbytes = walk->nbytes)) { | |
92 | /* only use complete blocks */ | |
93 | unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1); | |
94 | u8 *out = walk->dst.virt.addr; | |
95 | u8 *in = walk->src.virt.addr; | |
96 | ||
98971f84 | 97 | ret = crypt_s390_km(func, key, out, in, n); |
36eb2caa JG |
98 | if (ret < 0 || ret != n) |
99 | return -EIO; | |
a9e62fad HX |
100 | |
101 | nbytes &= DES_BLOCK_SIZE - 1; | |
102 | ret = blkcipher_walk_done(desc, walk, nbytes); | |
103 | } | |
104 | ||
105 | return ret; | |
106 | } | |
107 | ||
108 | static int cbc_desall_crypt(struct blkcipher_desc *desc, long func, | |
adc3fcf1 | 109 | struct blkcipher_walk *walk) |
a9e62fad | 110 | { |
adc3fcf1 | 111 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
a9e62fad HX |
112 | int ret = blkcipher_walk_virt(desc, walk); |
113 | unsigned int nbytes = walk->nbytes; | |
adc3fcf1 HF |
114 | struct { |
115 | u8 iv[DES_BLOCK_SIZE]; | |
116 | u8 key[DES3_KEY_SIZE]; | |
117 | } param; | |
a9e62fad HX |
118 | |
119 | if (!nbytes) | |
120 | goto out; | |
121 | ||
adc3fcf1 HF |
122 | memcpy(param.iv, walk->iv, DES_BLOCK_SIZE); |
123 | memcpy(param.key, ctx->key, DES3_KEY_SIZE); | |
a9e62fad HX |
124 | do { |
125 | /* only use complete blocks */ | |
126 | unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1); | |
127 | u8 *out = walk->dst.virt.addr; | |
128 | u8 *in = walk->src.virt.addr; | |
129 | ||
adc3fcf1 | 130 | ret = crypt_s390_kmc(func, ¶m, out, in, n); |
36eb2caa JG |
131 | if (ret < 0 || ret != n) |
132 | return -EIO; | |
a9e62fad HX |
133 | |
134 | nbytes &= DES_BLOCK_SIZE - 1; | |
135 | ret = blkcipher_walk_done(desc, walk, nbytes); | |
136 | } while ((nbytes = walk->nbytes)); | |
adc3fcf1 | 137 | memcpy(walk->iv, param.iv, DES_BLOCK_SIZE); |
a9e62fad HX |
138 | |
139 | out: | |
140 | return ret; | |
141 | } | |
142 | ||
143 | static int ecb_des_encrypt(struct blkcipher_desc *desc, | |
144 | struct scatterlist *dst, struct scatterlist *src, | |
145 | unsigned int nbytes) | |
146 | { | |
98971f84 | 147 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
a9e62fad HX |
148 | struct blkcipher_walk walk; |
149 | ||
150 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
98971f84 | 151 | return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, ctx->key, &walk); |
a9e62fad HX |
152 | } |
153 | ||
154 | static int ecb_des_decrypt(struct blkcipher_desc *desc, | |
155 | struct scatterlist *dst, struct scatterlist *src, | |
156 | unsigned int nbytes) | |
157 | { | |
98971f84 | 158 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
a9e62fad HX |
159 | struct blkcipher_walk walk; |
160 | ||
161 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
98971f84 | 162 | return ecb_desall_crypt(desc, KM_DEA_DECRYPT, ctx->key, &walk); |
a9e62fad HX |
163 | } |
164 | ||
165 | static struct crypto_alg ecb_des_alg = { | |
166 | .cra_name = "ecb(des)", | |
167 | .cra_driver_name = "ecb-des-s390", | |
168 | .cra_priority = CRYPT_S390_COMPOSITE_PRIORITY, | |
169 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
170 | .cra_blocksize = DES_BLOCK_SIZE, | |
98971f84 | 171 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
a9e62fad HX |
172 | .cra_type = &crypto_blkcipher_type, |
173 | .cra_module = THIS_MODULE, | |
a9e62fad HX |
174 | .cra_u = { |
175 | .blkcipher = { | |
176 | .min_keysize = DES_KEY_SIZE, | |
177 | .max_keysize = DES_KEY_SIZE, | |
178 | .setkey = des_setkey, | |
179 | .encrypt = ecb_des_encrypt, | |
180 | .decrypt = ecb_des_decrypt, | |
181 | } | |
182 | } | |
183 | }; | |
184 | ||
185 | static int cbc_des_encrypt(struct blkcipher_desc *desc, | |
186 | struct scatterlist *dst, struct scatterlist *src, | |
187 | unsigned int nbytes) | |
188 | { | |
a9e62fad HX |
189 | struct blkcipher_walk walk; |
190 | ||
191 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
adc3fcf1 | 192 | return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, &walk); |
a9e62fad HX |
193 | } |
194 | ||
195 | static int cbc_des_decrypt(struct blkcipher_desc *desc, | |
196 | struct scatterlist *dst, struct scatterlist *src, | |
197 | unsigned int nbytes) | |
198 | { | |
a9e62fad HX |
199 | struct blkcipher_walk walk; |
200 | ||
201 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
adc3fcf1 | 202 | return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, &walk); |
a9e62fad HX |
203 | } |
204 | ||
205 | static struct crypto_alg cbc_des_alg = { | |
206 | .cra_name = "cbc(des)", | |
207 | .cra_driver_name = "cbc-des-s390", | |
208 | .cra_priority = CRYPT_S390_COMPOSITE_PRIORITY, | |
209 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
210 | .cra_blocksize = DES_BLOCK_SIZE, | |
98971f84 | 211 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
a9e62fad HX |
212 | .cra_type = &crypto_blkcipher_type, |
213 | .cra_module = THIS_MODULE, | |
a9e62fad HX |
214 | .cra_u = { |
215 | .blkcipher = { | |
216 | .min_keysize = DES_KEY_SIZE, | |
217 | .max_keysize = DES_KEY_SIZE, | |
218 | .ivsize = DES_BLOCK_SIZE, | |
219 | .setkey = des_setkey, | |
220 | .encrypt = cbc_des_encrypt, | |
221 | .decrypt = cbc_des_decrypt, | |
222 | } | |
223 | } | |
224 | }; | |
225 | ||
1da177e4 LT |
226 | /* |
227 | * RFC2451: | |
228 | * | |
229 | * For DES-EDE3, there is no known need to reject weak or | |
230 | * complementation keys. Any weakness is obviated by the use of | |
231 | * multiple keys. | |
232 | * | |
233 | * However, if the first two or last two independent 64-bit keys are | |
234 | * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the | |
235 | * same as DES. Implementers MUST reject keys that exhibit this | |
236 | * property. | |
237 | * | |
238 | */ | |
98971f84 JG |
239 | static int des3_setkey(struct crypto_tfm *tfm, const u8 *key, |
240 | unsigned int key_len) | |
1da177e4 | 241 | { |
98971f84 | 242 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
560c06ae | 243 | u32 *flags = &tfm->crt_flags; |
1da177e4 | 244 | |
fed28611 DB |
245 | if (!(crypto_memneq(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) && |
246 | crypto_memneq(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2], | |
247 | DES_KEY_SIZE)) && | |
03b56ce5 JW |
248 | (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) { |
249 | *flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
1da177e4 LT |
250 | return -EINVAL; |
251 | } | |
98971f84 | 252 | memcpy(ctx->key, key, key_len); |
1da177e4 LT |
253 | return 0; |
254 | } | |
255 | ||
98971f84 | 256 | static void des3_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
1da177e4 | 257 | { |
98971f84 | 258 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
1da177e4 | 259 | |
98971f84 | 260 | crypt_s390_km(KM_TDEA_192_ENCRYPT, ctx->key, dst, src, DES_BLOCK_SIZE); |
1da177e4 LT |
261 | } |
262 | ||
98971f84 | 263 | static void des3_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
1da177e4 | 264 | { |
98971f84 | 265 | struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm); |
1da177e4 | 266 | |
98971f84 | 267 | crypt_s390_km(KM_TDEA_192_DECRYPT, ctx->key, dst, src, DES_BLOCK_SIZE); |
1da177e4 LT |
268 | } |
269 | ||
98971f84 | 270 | static struct crypto_alg des3_alg = { |
1da177e4 | 271 | .cra_name = "des3_ede", |
65b75c36 HX |
272 | .cra_driver_name = "des3_ede-s390", |
273 | .cra_priority = CRYPT_S390_PRIORITY, | |
1da177e4 | 274 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
1efbd15c | 275 | .cra_blocksize = DES_BLOCK_SIZE, |
98971f84 | 276 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
1da177e4 | 277 | .cra_module = THIS_MODULE, |
c1357833 JG |
278 | .cra_u = { |
279 | .cipher = { | |
98971f84 JG |
280 | .cia_min_keysize = DES3_KEY_SIZE, |
281 | .cia_max_keysize = DES3_KEY_SIZE, | |
282 | .cia_setkey = des3_setkey, | |
283 | .cia_encrypt = des3_encrypt, | |
284 | .cia_decrypt = des3_decrypt, | |
c1357833 JG |
285 | } |
286 | } | |
1da177e4 LT |
287 | }; |
288 | ||
98971f84 JG |
289 | static int ecb_des3_encrypt(struct blkcipher_desc *desc, |
290 | struct scatterlist *dst, struct scatterlist *src, | |
291 | unsigned int nbytes) | |
a9e62fad | 292 | { |
98971f84 | 293 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
a9e62fad HX |
294 | struct blkcipher_walk walk; |
295 | ||
296 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
98971f84 | 297 | return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, ctx->key, &walk); |
a9e62fad HX |
298 | } |
299 | ||
98971f84 JG |
300 | static int ecb_des3_decrypt(struct blkcipher_desc *desc, |
301 | struct scatterlist *dst, struct scatterlist *src, | |
302 | unsigned int nbytes) | |
a9e62fad | 303 | { |
98971f84 | 304 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
a9e62fad HX |
305 | struct blkcipher_walk walk; |
306 | ||
307 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
98971f84 | 308 | return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, ctx->key, &walk); |
a9e62fad HX |
309 | } |
310 | ||
98971f84 | 311 | static struct crypto_alg ecb_des3_alg = { |
a9e62fad HX |
312 | .cra_name = "ecb(des3_ede)", |
313 | .cra_driver_name = "ecb-des3_ede-s390", | |
314 | .cra_priority = CRYPT_S390_COMPOSITE_PRIORITY, | |
315 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
1efbd15c | 316 | .cra_blocksize = DES_BLOCK_SIZE, |
98971f84 | 317 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
a9e62fad HX |
318 | .cra_type = &crypto_blkcipher_type, |
319 | .cra_module = THIS_MODULE, | |
a9e62fad HX |
320 | .cra_u = { |
321 | .blkcipher = { | |
98971f84 JG |
322 | .min_keysize = DES3_KEY_SIZE, |
323 | .max_keysize = DES3_KEY_SIZE, | |
324 | .setkey = des3_setkey, | |
325 | .encrypt = ecb_des3_encrypt, | |
326 | .decrypt = ecb_des3_decrypt, | |
a9e62fad HX |
327 | } |
328 | } | |
329 | }; | |
330 | ||
98971f84 JG |
331 | static int cbc_des3_encrypt(struct blkcipher_desc *desc, |
332 | struct scatterlist *dst, struct scatterlist *src, | |
333 | unsigned int nbytes) | |
a9e62fad | 334 | { |
a9e62fad HX |
335 | struct blkcipher_walk walk; |
336 | ||
337 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
adc3fcf1 | 338 | return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, &walk); |
a9e62fad HX |
339 | } |
340 | ||
98971f84 JG |
341 | static int cbc_des3_decrypt(struct blkcipher_desc *desc, |
342 | struct scatterlist *dst, struct scatterlist *src, | |
343 | unsigned int nbytes) | |
a9e62fad | 344 | { |
a9e62fad HX |
345 | struct blkcipher_walk walk; |
346 | ||
347 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
adc3fcf1 | 348 | return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, &walk); |
a9e62fad HX |
349 | } |
350 | ||
98971f84 | 351 | static struct crypto_alg cbc_des3_alg = { |
a9e62fad HX |
352 | .cra_name = "cbc(des3_ede)", |
353 | .cra_driver_name = "cbc-des3_ede-s390", | |
354 | .cra_priority = CRYPT_S390_COMPOSITE_PRIORITY, | |
355 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
1efbd15c | 356 | .cra_blocksize = DES_BLOCK_SIZE, |
98971f84 | 357 | .cra_ctxsize = sizeof(struct s390_des_ctx), |
a9e62fad HX |
358 | .cra_type = &crypto_blkcipher_type, |
359 | .cra_module = THIS_MODULE, | |
a9e62fad HX |
360 | .cra_u = { |
361 | .blkcipher = { | |
98971f84 JG |
362 | .min_keysize = DES3_KEY_SIZE, |
363 | .max_keysize = DES3_KEY_SIZE, | |
1efbd15c | 364 | .ivsize = DES_BLOCK_SIZE, |
98971f84 JG |
365 | .setkey = des3_setkey, |
366 | .encrypt = cbc_des3_encrypt, | |
367 | .decrypt = cbc_des3_decrypt, | |
a9e62fad HX |
368 | } |
369 | } | |
370 | }; | |
371 | ||
ee97dc7d HF |
372 | static unsigned int __ctrblk_init(u8 *ctrptr, unsigned int nbytes) |
373 | { | |
374 | unsigned int i, n; | |
375 | ||
376 | /* align to block size, max. PAGE_SIZE */ | |
377 | n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(DES_BLOCK_SIZE - 1); | |
378 | for (i = DES_BLOCK_SIZE; i < n; i += DES_BLOCK_SIZE) { | |
379 | memcpy(ctrptr + i, ctrptr + i - DES_BLOCK_SIZE, DES_BLOCK_SIZE); | |
380 | crypto_inc(ctrptr + i, DES_BLOCK_SIZE); | |
381 | } | |
382 | return n; | |
383 | } | |
384 | ||
0200f3ec | 385 | static int ctr_desall_crypt(struct blkcipher_desc *desc, long func, |
ee97dc7d HF |
386 | struct s390_des_ctx *ctx, |
387 | struct blkcipher_walk *walk) | |
0200f3ec GS |
388 | { |
389 | int ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE); | |
ee97dc7d HF |
390 | unsigned int n, nbytes; |
391 | u8 buf[DES_BLOCK_SIZE], ctrbuf[DES_BLOCK_SIZE]; | |
392 | u8 *out, *in, *ctrptr = ctrbuf; | |
393 | ||
394 | if (!walk->nbytes) | |
395 | return ret; | |
0200f3ec | 396 | |
ee97dc7d HF |
397 | if (spin_trylock(&ctrblk_lock)) |
398 | ctrptr = ctrblk; | |
399 | ||
400 | memcpy(ctrptr, walk->iv, DES_BLOCK_SIZE); | |
0200f3ec GS |
401 | while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) { |
402 | out = walk->dst.virt.addr; | |
403 | in = walk->src.virt.addr; | |
404 | while (nbytes >= DES_BLOCK_SIZE) { | |
ee97dc7d HF |
405 | if (ctrptr == ctrblk) |
406 | n = __ctrblk_init(ctrptr, nbytes); | |
407 | else | |
408 | n = DES_BLOCK_SIZE; | |
409 | ret = crypt_s390_kmctr(func, ctx->key, out, in, | |
410 | n, ctrptr); | |
411 | if (ret < 0 || ret != n) { | |
412 | if (ctrptr == ctrblk) | |
413 | spin_unlock(&ctrblk_lock); | |
36eb2caa | 414 | return -EIO; |
ee97dc7d | 415 | } |
0200f3ec | 416 | if (n > DES_BLOCK_SIZE) |
ee97dc7d | 417 | memcpy(ctrptr, ctrptr + n - DES_BLOCK_SIZE, |
0200f3ec | 418 | DES_BLOCK_SIZE); |
ee97dc7d | 419 | crypto_inc(ctrptr, DES_BLOCK_SIZE); |
0200f3ec GS |
420 | out += n; |
421 | in += n; | |
422 | nbytes -= n; | |
423 | } | |
424 | ret = blkcipher_walk_done(desc, walk, nbytes); | |
425 | } | |
ee97dc7d HF |
426 | if (ctrptr == ctrblk) { |
427 | if (nbytes) | |
428 | memcpy(ctrbuf, ctrptr, DES_BLOCK_SIZE); | |
429 | else | |
430 | memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE); | |
431 | spin_unlock(&ctrblk_lock); | |
3901c112 HF |
432 | } else { |
433 | if (!nbytes) | |
434 | memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE); | |
ee97dc7d | 435 | } |
0200f3ec GS |
436 | /* final block may be < DES_BLOCK_SIZE, copy only nbytes */ |
437 | if (nbytes) { | |
438 | out = walk->dst.virt.addr; | |
439 | in = walk->src.virt.addr; | |
440 | ret = crypt_s390_kmctr(func, ctx->key, buf, in, | |
ee97dc7d | 441 | DES_BLOCK_SIZE, ctrbuf); |
36eb2caa JG |
442 | if (ret < 0 || ret != DES_BLOCK_SIZE) |
443 | return -EIO; | |
0200f3ec | 444 | memcpy(out, buf, nbytes); |
ee97dc7d | 445 | crypto_inc(ctrbuf, DES_BLOCK_SIZE); |
0200f3ec | 446 | ret = blkcipher_walk_done(desc, walk, 0); |
ee97dc7d | 447 | memcpy(walk->iv, ctrbuf, DES_BLOCK_SIZE); |
0200f3ec | 448 | } |
0200f3ec GS |
449 | return ret; |
450 | } | |
451 | ||
452 | static int ctr_des_encrypt(struct blkcipher_desc *desc, | |
453 | struct scatterlist *dst, struct scatterlist *src, | |
454 | unsigned int nbytes) | |
455 | { | |
456 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
457 | struct blkcipher_walk walk; | |
458 | ||
459 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
460 | return ctr_desall_crypt(desc, KMCTR_DEA_ENCRYPT, ctx, &walk); | |
461 | } | |
462 | ||
463 | static int ctr_des_decrypt(struct blkcipher_desc *desc, | |
464 | struct scatterlist *dst, struct scatterlist *src, | |
465 | unsigned int nbytes) | |
466 | { | |
467 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
468 | struct blkcipher_walk walk; | |
469 | ||
470 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
471 | return ctr_desall_crypt(desc, KMCTR_DEA_DECRYPT, ctx, &walk); | |
472 | } | |
473 | ||
474 | static struct crypto_alg ctr_des_alg = { | |
475 | .cra_name = "ctr(des)", | |
476 | .cra_driver_name = "ctr-des-s390", | |
477 | .cra_priority = CRYPT_S390_COMPOSITE_PRIORITY, | |
478 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
479 | .cra_blocksize = 1, | |
480 | .cra_ctxsize = sizeof(struct s390_des_ctx), | |
481 | .cra_type = &crypto_blkcipher_type, | |
482 | .cra_module = THIS_MODULE, | |
0200f3ec GS |
483 | .cra_u = { |
484 | .blkcipher = { | |
485 | .min_keysize = DES_KEY_SIZE, | |
486 | .max_keysize = DES_KEY_SIZE, | |
487 | .ivsize = DES_BLOCK_SIZE, | |
488 | .setkey = des_setkey, | |
489 | .encrypt = ctr_des_encrypt, | |
490 | .decrypt = ctr_des_decrypt, | |
491 | } | |
492 | } | |
493 | }; | |
494 | ||
495 | static int ctr_des3_encrypt(struct blkcipher_desc *desc, | |
496 | struct scatterlist *dst, struct scatterlist *src, | |
497 | unsigned int nbytes) | |
498 | { | |
499 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
500 | struct blkcipher_walk walk; | |
501 | ||
502 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
503 | return ctr_desall_crypt(desc, KMCTR_TDEA_192_ENCRYPT, ctx, &walk); | |
504 | } | |
505 | ||
506 | static int ctr_des3_decrypt(struct blkcipher_desc *desc, | |
507 | struct scatterlist *dst, struct scatterlist *src, | |
508 | unsigned int nbytes) | |
509 | { | |
510 | struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
511 | struct blkcipher_walk walk; | |
512 | ||
513 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
514 | return ctr_desall_crypt(desc, KMCTR_TDEA_192_DECRYPT, ctx, &walk); | |
515 | } | |
516 | ||
517 | static struct crypto_alg ctr_des3_alg = { | |
518 | .cra_name = "ctr(des3_ede)", | |
519 | .cra_driver_name = "ctr-des3_ede-s390", | |
520 | .cra_priority = CRYPT_S390_COMPOSITE_PRIORITY, | |
521 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
522 | .cra_blocksize = 1, | |
523 | .cra_ctxsize = sizeof(struct s390_des_ctx), | |
524 | .cra_type = &crypto_blkcipher_type, | |
525 | .cra_module = THIS_MODULE, | |
0200f3ec GS |
526 | .cra_u = { |
527 | .blkcipher = { | |
528 | .min_keysize = DES3_KEY_SIZE, | |
529 | .max_keysize = DES3_KEY_SIZE, | |
530 | .ivsize = DES_BLOCK_SIZE, | |
531 | .setkey = des3_setkey, | |
532 | .encrypt = ctr_des3_encrypt, | |
533 | .decrypt = ctr_des3_decrypt, | |
534 | } | |
535 | } | |
536 | }; | |
537 | ||
98971f84 | 538 | static int __init des_s390_init(void) |
1da177e4 | 539 | { |
80d663a4 | 540 | int ret; |
1da177e4 | 541 | |
1822bc90 JG |
542 | if (!crypt_s390_func_available(KM_DEA_ENCRYPT, CRYPT_S390_MSA) || |
543 | !crypt_s390_func_available(KM_TDEA_192_ENCRYPT, CRYPT_S390_MSA)) | |
86aa9fc2 | 544 | return -EOPNOTSUPP; |
1da177e4 | 545 | |
a9e62fad HX |
546 | ret = crypto_register_alg(&des_alg); |
547 | if (ret) | |
548 | goto des_err; | |
549 | ret = crypto_register_alg(&ecb_des_alg); | |
550 | if (ret) | |
551 | goto ecb_des_err; | |
552 | ret = crypto_register_alg(&cbc_des_alg); | |
553 | if (ret) | |
554 | goto cbc_des_err; | |
98971f84 | 555 | ret = crypto_register_alg(&des3_alg); |
a9e62fad | 556 | if (ret) |
98971f84 JG |
557 | goto des3_err; |
558 | ret = crypto_register_alg(&ecb_des3_alg); | |
a9e62fad | 559 | if (ret) |
98971f84 JG |
560 | goto ecb_des3_err; |
561 | ret = crypto_register_alg(&cbc_des3_alg); | |
a9e62fad | 562 | if (ret) |
98971f84 | 563 | goto cbc_des3_err; |
0200f3ec GS |
564 | |
565 | if (crypt_s390_func_available(KMCTR_DEA_ENCRYPT, | |
566 | CRYPT_S390_MSA | CRYPT_S390_MSA4) && | |
567 | crypt_s390_func_available(KMCTR_TDEA_192_ENCRYPT, | |
568 | CRYPT_S390_MSA | CRYPT_S390_MSA4)) { | |
569 | ret = crypto_register_alg(&ctr_des_alg); | |
570 | if (ret) | |
571 | goto ctr_des_err; | |
572 | ret = crypto_register_alg(&ctr_des3_alg); | |
573 | if (ret) | |
574 | goto ctr_des3_err; | |
575 | ctrblk = (u8 *) __get_free_page(GFP_KERNEL); | |
576 | if (!ctrblk) { | |
577 | ret = -ENOMEM; | |
578 | goto ctr_mem_err; | |
579 | } | |
580 | } | |
a9e62fad HX |
581 | out: |
582 | return ret; | |
583 | ||
0200f3ec GS |
584 | ctr_mem_err: |
585 | crypto_unregister_alg(&ctr_des3_alg); | |
586 | ctr_des3_err: | |
587 | crypto_unregister_alg(&ctr_des_alg); | |
588 | ctr_des_err: | |
589 | crypto_unregister_alg(&cbc_des3_alg); | |
98971f84 JG |
590 | cbc_des3_err: |
591 | crypto_unregister_alg(&ecb_des3_alg); | |
592 | ecb_des3_err: | |
593 | crypto_unregister_alg(&des3_alg); | |
594 | des3_err: | |
a9e62fad HX |
595 | crypto_unregister_alg(&cbc_des_alg); |
596 | cbc_des_err: | |
597 | crypto_unregister_alg(&ecb_des_alg); | |
598 | ecb_des_err: | |
599 | crypto_unregister_alg(&des_alg); | |
600 | des_err: | |
601 | goto out; | |
1da177e4 LT |
602 | } |
603 | ||
1efbd15c | 604 | static void __exit des_s390_exit(void) |
1da177e4 | 605 | { |
0200f3ec GS |
606 | if (ctrblk) { |
607 | crypto_unregister_alg(&ctr_des_alg); | |
608 | crypto_unregister_alg(&ctr_des3_alg); | |
609 | free_page((unsigned long) ctrblk); | |
610 | } | |
98971f84 JG |
611 | crypto_unregister_alg(&cbc_des3_alg); |
612 | crypto_unregister_alg(&ecb_des3_alg); | |
613 | crypto_unregister_alg(&des3_alg); | |
a9e62fad HX |
614 | crypto_unregister_alg(&cbc_des_alg); |
615 | crypto_unregister_alg(&ecb_des_alg); | |
1da177e4 LT |
616 | crypto_unregister_alg(&des_alg); |
617 | } | |
618 | ||
9f7819c1 | 619 | module_init(des_s390_init); |
1efbd15c | 620 | module_exit(des_s390_exit); |
1da177e4 | 621 | |
5d26a105 KC |
622 | MODULE_ALIAS_CRYPTO("des"); |
623 | MODULE_ALIAS_CRYPTO("des3_ede"); | |
1da177e4 LT |
624 | |
625 | MODULE_LICENSE("GPL"); | |
626 | MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms"); |