4 * s390 implementation of the DES Cipher Algorithm.
6 * Copyright (c) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Author(s): Thomas Spatzier (tspat@de.ibm.com)
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.
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/crypto.h>
20 #include "crypt_s390.h"
21 #include "crypto_des.h"
23 #define DES_BLOCK_SIZE 8
24 #define DES_KEY_SIZE 8
26 #define DES3_128_KEY_SIZE (2 * DES_KEY_SIZE)
27 #define DES3_128_BLOCK_SIZE DES_BLOCK_SIZE
29 #define DES3_192_KEY_SIZE (3 * DES_KEY_SIZE)
30 #define DES3_192_BLOCK_SIZE DES_BLOCK_SIZE
32 struct crypt_s390_des_ctx {
33 u8 iv[DES_BLOCK_SIZE];
37 struct crypt_s390_des3_128_ctx {
38 u8 iv[DES_BLOCK_SIZE];
39 u8 key[DES3_128_KEY_SIZE];
42 struct crypt_s390_des3_192_ctx {
43 u8 iv[DES_BLOCK_SIZE];
44 u8 key[DES3_192_KEY_SIZE];
47 static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
50 struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
51 u32 *flags = &tfm->crt_flags;
54 /* test if key is valid (not a weak key) */
55 ret = crypto_des_check_key(key, keylen, flags);
57 memcpy(dctx->key, key, keylen);
61 static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
63 struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
65 crypt_s390_km(KM_DEA_ENCRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
68 static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
70 struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
72 crypt_s390_km(KM_DEA_DECRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
75 static unsigned int des_encrypt_ecb(const struct cipher_desc *desc, u8 *out,
76 const u8 *in, unsigned int nbytes)
78 struct crypt_s390_des_ctx *sctx = crypto_tfm_ctx(desc->tfm);
81 /* only use complete blocks */
82 nbytes &= ~(DES_BLOCK_SIZE - 1);
83 ret = crypt_s390_km(KM_DEA_ENCRYPT, sctx->key, out, in, nbytes);
84 BUG_ON((ret < 0) || (ret != nbytes));
89 static unsigned int des_decrypt_ecb(const struct cipher_desc *desc, u8 *out,
90 const u8 *in, unsigned int nbytes)
92 struct crypt_s390_des_ctx *sctx = crypto_tfm_ctx(desc->tfm);
95 /* only use complete blocks */
96 nbytes &= ~(DES_BLOCK_SIZE - 1);
97 ret = crypt_s390_km(KM_DEA_DECRYPT, sctx->key, out, in, nbytes);
98 BUG_ON((ret < 0) || (ret != nbytes));
103 static unsigned int des_encrypt_cbc(const struct cipher_desc *desc, u8 *out,
104 const u8 *in, unsigned int nbytes)
106 struct crypt_s390_des_ctx *sctx = crypto_tfm_ctx(desc->tfm);
109 /* only use complete blocks */
110 nbytes &= ~(DES_BLOCK_SIZE - 1);
112 memcpy(sctx->iv, desc->info, DES_BLOCK_SIZE);
113 ret = crypt_s390_kmc(KMC_DEA_ENCRYPT, &sctx->iv, out, in, nbytes);
114 BUG_ON((ret < 0) || (ret != nbytes));
116 memcpy(desc->info, sctx->iv, DES_BLOCK_SIZE);
120 static unsigned int des_decrypt_cbc(const struct cipher_desc *desc, u8 *out,
121 const u8 *in, unsigned int nbytes)
123 struct crypt_s390_des_ctx *sctx = crypto_tfm_ctx(desc->tfm);
126 /* only use complete blocks */
127 nbytes &= ~(DES_BLOCK_SIZE - 1);
129 memcpy(&sctx->iv, desc->info, DES_BLOCK_SIZE);
130 ret = crypt_s390_kmc(KMC_DEA_DECRYPT, &sctx->iv, out, in, nbytes);
131 BUG_ON((ret < 0) || (ret != nbytes));
136 static struct crypto_alg des_alg = {
138 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
139 .cra_blocksize = DES_BLOCK_SIZE,
140 .cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
141 .cra_module = THIS_MODULE,
142 .cra_list = LIST_HEAD_INIT(des_alg.cra_list),
145 .cia_min_keysize = DES_KEY_SIZE,
146 .cia_max_keysize = DES_KEY_SIZE,
147 .cia_setkey = des_setkey,
148 .cia_encrypt = des_encrypt,
149 .cia_decrypt = des_decrypt,
150 .cia_encrypt_ecb = des_encrypt_ecb,
151 .cia_decrypt_ecb = des_decrypt_ecb,
152 .cia_encrypt_cbc = des_encrypt_cbc,
153 .cia_decrypt_cbc = des_decrypt_cbc,
161 * For DES-EDE3, there is no known need to reject weak or
162 * complementation keys. Any weakness is obviated by the use of
165 * However, if the two independent 64-bit keys are equal,
166 * then the DES3 operation is simply the same as DES.
167 * Implementers MUST reject keys that exhibit this property.
170 static int des3_128_setkey(struct crypto_tfm *tfm, const u8 *key,
174 struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
175 const u8 *temp_key = key;
176 u32 *flags = &tfm->crt_flags;
178 if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE))) {
179 *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
182 for (i = 0; i < 2; i++, temp_key += DES_KEY_SIZE) {
183 ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
187 memcpy(dctx->key, key, keylen);
191 static void des3_128_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
193 struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
195 crypt_s390_km(KM_TDEA_128_ENCRYPT, dctx->key, dst, (void*)src,
196 DES3_128_BLOCK_SIZE);
199 static void des3_128_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
201 struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
203 crypt_s390_km(KM_TDEA_128_DECRYPT, dctx->key, dst, (void*)src,
204 DES3_128_BLOCK_SIZE);
207 static unsigned int des3_128_encrypt_ecb(const struct cipher_desc *desc,
208 u8 *out, const u8 *in,
211 struct crypt_s390_des3_128_ctx *sctx = crypto_tfm_ctx(desc->tfm);
214 /* only use complete blocks */
215 nbytes &= ~(DES3_128_BLOCK_SIZE - 1);
216 ret = crypt_s390_km(KM_TDEA_128_ENCRYPT, sctx->key, out, in, nbytes);
217 BUG_ON((ret < 0) || (ret != nbytes));
222 static unsigned int des3_128_decrypt_ecb(const struct cipher_desc *desc,
223 u8 *out, const u8 *in,
226 struct crypt_s390_des3_128_ctx *sctx = crypto_tfm_ctx(desc->tfm);
229 /* only use complete blocks */
230 nbytes &= ~(DES3_128_BLOCK_SIZE - 1);
231 ret = crypt_s390_km(KM_TDEA_128_DECRYPT, sctx->key, out, in, nbytes);
232 BUG_ON((ret < 0) || (ret != nbytes));
237 static unsigned int des3_128_encrypt_cbc(const struct cipher_desc *desc,
238 u8 *out, const u8 *in,
241 struct crypt_s390_des3_128_ctx *sctx = crypto_tfm_ctx(desc->tfm);
244 /* only use complete blocks */
245 nbytes &= ~(DES3_128_BLOCK_SIZE - 1);
247 memcpy(sctx->iv, desc->info, DES3_128_BLOCK_SIZE);
248 ret = crypt_s390_kmc(KMC_TDEA_128_ENCRYPT, &sctx->iv, out, in, nbytes);
249 BUG_ON((ret < 0) || (ret != nbytes));
251 memcpy(desc->info, sctx->iv, DES3_128_BLOCK_SIZE);
255 static unsigned int des3_128_decrypt_cbc(const struct cipher_desc *desc,
256 u8 *out, const u8 *in,
259 struct crypt_s390_des3_128_ctx *sctx = crypto_tfm_ctx(desc->tfm);
262 /* only use complete blocks */
263 nbytes &= ~(DES3_128_BLOCK_SIZE - 1);
265 memcpy(&sctx->iv, desc->info, DES3_128_BLOCK_SIZE);
266 ret = crypt_s390_kmc(KMC_TDEA_128_DECRYPT, &sctx->iv, out, in, nbytes);
267 BUG_ON((ret < 0) || (ret != nbytes));
272 static struct crypto_alg des3_128_alg = {
273 .cra_name = "des3_ede128",
274 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
275 .cra_blocksize = DES3_128_BLOCK_SIZE,
276 .cra_ctxsize = sizeof(struct crypt_s390_des3_128_ctx),
277 .cra_module = THIS_MODULE,
278 .cra_list = LIST_HEAD_INIT(des3_128_alg.cra_list),
281 .cia_min_keysize = DES3_128_KEY_SIZE,
282 .cia_max_keysize = DES3_128_KEY_SIZE,
283 .cia_setkey = des3_128_setkey,
284 .cia_encrypt = des3_128_encrypt,
285 .cia_decrypt = des3_128_decrypt,
286 .cia_encrypt_ecb = des3_128_encrypt_ecb,
287 .cia_decrypt_ecb = des3_128_decrypt_ecb,
288 .cia_encrypt_cbc = des3_128_encrypt_cbc,
289 .cia_decrypt_cbc = des3_128_decrypt_cbc,
297 * For DES-EDE3, there is no known need to reject weak or
298 * complementation keys. Any weakness is obviated by the use of
301 * However, if the first two or last two independent 64-bit keys are
302 * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
303 * same as DES. Implementers MUST reject keys that exhibit this
307 static int des3_192_setkey(struct crypto_tfm *tfm, const u8 *key,
311 struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
312 const u8 *temp_key = key;
313 u32 *flags = &tfm->crt_flags;
315 if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
316 memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
319 *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
322 for (i = 0; i < 3; i++, temp_key += DES_KEY_SIZE) {
323 ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
327 memcpy(dctx->key, key, keylen);
331 static void des3_192_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
333 struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
335 crypt_s390_km(KM_TDEA_192_ENCRYPT, dctx->key, dst, (void*)src,
336 DES3_192_BLOCK_SIZE);
339 static void des3_192_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
341 struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
343 crypt_s390_km(KM_TDEA_192_DECRYPT, dctx->key, dst, (void*)src,
344 DES3_192_BLOCK_SIZE);
347 static unsigned int des3_192_encrypt_ecb(const struct cipher_desc *desc,
348 u8 *out, const u8 *in,
351 struct crypt_s390_des3_192_ctx *sctx = crypto_tfm_ctx(desc->tfm);
354 /* only use complete blocks */
355 nbytes &= ~(DES3_192_BLOCK_SIZE - 1);
356 ret = crypt_s390_km(KM_TDEA_192_ENCRYPT, sctx->key, out, in, nbytes);
357 BUG_ON((ret < 0) || (ret != nbytes));
362 static unsigned int des3_192_decrypt_ecb(const struct cipher_desc *desc,
363 u8 *out, const u8 *in,
366 struct crypt_s390_des3_192_ctx *sctx = crypto_tfm_ctx(desc->tfm);
369 /* only use complete blocks */
370 nbytes &= ~(DES3_192_BLOCK_SIZE - 1);
371 ret = crypt_s390_km(KM_TDEA_192_DECRYPT, sctx->key, out, in, nbytes);
372 BUG_ON((ret < 0) || (ret != nbytes));
377 static unsigned int des3_192_encrypt_cbc(const struct cipher_desc *desc,
378 u8 *out, const u8 *in,
381 struct crypt_s390_des3_192_ctx *sctx = crypto_tfm_ctx(desc->tfm);
384 /* only use complete blocks */
385 nbytes &= ~(DES3_192_BLOCK_SIZE - 1);
387 memcpy(sctx->iv, desc->info, DES3_192_BLOCK_SIZE);
388 ret = crypt_s390_kmc(KMC_TDEA_192_ENCRYPT, &sctx->iv, out, in, nbytes);
389 BUG_ON((ret < 0) || (ret != nbytes));
391 memcpy(desc->info, sctx->iv, DES3_192_BLOCK_SIZE);
395 static unsigned int des3_192_decrypt_cbc(const struct cipher_desc *desc,
396 u8 *out, const u8 *in,
399 struct crypt_s390_des3_192_ctx *sctx = crypto_tfm_ctx(desc->tfm);
402 /* only use complete blocks */
403 nbytes &= ~(DES3_192_BLOCK_SIZE - 1);
405 memcpy(&sctx->iv, desc->info, DES3_192_BLOCK_SIZE);
406 ret = crypt_s390_kmc(KMC_TDEA_192_DECRYPT, &sctx->iv, out, in, nbytes);
407 BUG_ON((ret < 0) || (ret != nbytes));
412 static struct crypto_alg des3_192_alg = {
413 .cra_name = "des3_ede",
414 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
415 .cra_blocksize = DES3_192_BLOCK_SIZE,
416 .cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
417 .cra_module = THIS_MODULE,
418 .cra_list = LIST_HEAD_INIT(des3_192_alg.cra_list),
421 .cia_min_keysize = DES3_192_KEY_SIZE,
422 .cia_max_keysize = DES3_192_KEY_SIZE,
423 .cia_setkey = des3_192_setkey,
424 .cia_encrypt = des3_192_encrypt,
425 .cia_decrypt = des3_192_decrypt,
426 .cia_encrypt_ecb = des3_192_encrypt_ecb,
427 .cia_decrypt_ecb = des3_192_decrypt_ecb,
428 .cia_encrypt_cbc = des3_192_encrypt_cbc,
429 .cia_decrypt_cbc = des3_192_decrypt_cbc,
434 static int init(void)
438 if (!crypt_s390_func_available(KM_DEA_ENCRYPT) ||
439 !crypt_s390_func_available(KM_TDEA_128_ENCRYPT) ||
440 !crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
443 ret |= (crypto_register_alg(&des_alg) == 0) ? 0:1;
444 ret |= (crypto_register_alg(&des3_128_alg) == 0) ? 0:2;
445 ret |= (crypto_register_alg(&des3_192_alg) == 0) ? 0:4;
447 crypto_unregister_alg(&des3_192_alg);
448 crypto_unregister_alg(&des3_128_alg);
449 crypto_unregister_alg(&des_alg);
455 static void __exit fini(void)
457 crypto_unregister_alg(&des3_192_alg);
458 crypto_unregister_alg(&des3_128_alg);
459 crypto_unregister_alg(&des_alg);
466 MODULE_ALIAS("des3_ede");
468 MODULE_LICENSE("GPL");
469 MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");