1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Glue code for DES encryption optimized for sparc64 crypto opcodes.
4 * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9 #include <linux/crypto.h>
10 #include <linux/init.h>
11 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <crypto/algapi.h>
15 #include <crypto/internal/des.h>
16 #include <crypto/internal/skcipher.h>
18 #include <asm/fpumacro.h>
19 #include <asm/pstate.h>
24 struct des_sparc64_ctx {
25 u64 encrypt_expkey[DES_EXPKEY_WORDS / 2];
26 u64 decrypt_expkey[DES_EXPKEY_WORDS / 2];
29 struct des3_ede_sparc64_ctx {
30 u64 encrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
31 u64 decrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
34 static void encrypt_to_decrypt(u64 *d, const u64 *e)
36 const u64 *s = e + (DES_EXPKEY_WORDS / 2) - 1;
39 for (i = 0; i < DES_EXPKEY_WORDS / 2; i++)
43 extern void des_sparc64_key_expand(const u32 *input_key, u64 *key);
45 static int des_set_key(struct crypto_tfm *tfm, const u8 *key,
48 struct des_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
51 /* Even though we have special instructions for key expansion,
52 * we call des_verify_key() so that we don't have to write our own
53 * weak key detection code.
55 err = crypto_des_verify_key(tfm, key);
59 des_sparc64_key_expand((const u32 *) key, &dctx->encrypt_expkey[0]);
60 encrypt_to_decrypt(&dctx->decrypt_expkey[0], &dctx->encrypt_expkey[0]);
65 static int des_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *key,
68 return des_set_key(crypto_skcipher_tfm(tfm), key, keylen);
71 extern void des_sparc64_crypt(const u64 *key, const u64 *input,
74 static void sparc_des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
76 struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
77 const u64 *K = ctx->encrypt_expkey;
79 des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
82 static void sparc_des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
84 struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
85 const u64 *K = ctx->decrypt_expkey;
87 des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
90 extern void des_sparc64_load_keys(const u64 *key);
92 extern void des_sparc64_ecb_crypt(const u64 *input, u64 *output,
95 static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
97 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
98 const struct des_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
99 struct skcipher_walk walk;
103 err = skcipher_walk_virt(&walk, req, true);
108 des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
110 des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
111 while ((nbytes = walk.nbytes) != 0) {
112 des_sparc64_ecb_crypt(walk.src.virt.addr, walk.dst.virt.addr,
113 round_down(nbytes, DES_BLOCK_SIZE));
114 err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
120 static int ecb_encrypt(struct skcipher_request *req)
122 return __ecb_crypt(req, true);
125 static int ecb_decrypt(struct skcipher_request *req)
127 return __ecb_crypt(req, false);
130 extern void des_sparc64_cbc_encrypt(const u64 *input, u64 *output,
131 unsigned int len, u64 *iv);
133 extern void des_sparc64_cbc_decrypt(const u64 *input, u64 *output,
134 unsigned int len, u64 *iv);
136 static int __cbc_crypt(struct skcipher_request *req, bool encrypt)
138 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
139 const struct des_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
140 struct skcipher_walk walk;
144 err = skcipher_walk_virt(&walk, req, true);
149 des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
151 des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
152 while ((nbytes = walk.nbytes) != 0) {
154 des_sparc64_cbc_encrypt(walk.src.virt.addr,
160 des_sparc64_cbc_decrypt(walk.src.virt.addr,
165 err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
171 static int cbc_encrypt(struct skcipher_request *req)
173 return __cbc_crypt(req, true);
176 static int cbc_decrypt(struct skcipher_request *req)
178 return __cbc_crypt(req, false);
181 static int des3_ede_set_key(struct crypto_tfm *tfm, const u8 *key,
184 struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
185 u64 k1[DES_EXPKEY_WORDS / 2];
186 u64 k2[DES_EXPKEY_WORDS / 2];
187 u64 k3[DES_EXPKEY_WORDS / 2];
190 err = crypto_des3_ede_verify_key(tfm, key);
194 des_sparc64_key_expand((const u32 *)key, k1);
196 des_sparc64_key_expand((const u32 *)key, k2);
198 des_sparc64_key_expand((const u32 *)key, k3);
200 memcpy(&dctx->encrypt_expkey[0], &k1[0], sizeof(k1));
201 encrypt_to_decrypt(&dctx->encrypt_expkey[DES_EXPKEY_WORDS / 2], &k2[0]);
202 memcpy(&dctx->encrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
205 encrypt_to_decrypt(&dctx->decrypt_expkey[0], &k3[0]);
206 memcpy(&dctx->decrypt_expkey[DES_EXPKEY_WORDS / 2],
208 encrypt_to_decrypt(&dctx->decrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
214 static int des3_ede_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *key,
217 return des3_ede_set_key(crypto_skcipher_tfm(tfm), key, keylen);
220 extern void des3_ede_sparc64_crypt(const u64 *key, const u64 *input,
223 static void sparc_des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
225 struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
226 const u64 *K = ctx->encrypt_expkey;
228 des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
231 static void sparc_des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
233 struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
234 const u64 *K = ctx->decrypt_expkey;
236 des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
239 extern void des3_ede_sparc64_load_keys(const u64 *key);
241 extern void des3_ede_sparc64_ecb_crypt(const u64 *expkey, const u64 *input,
242 u64 *output, unsigned int len);
244 static int __ecb3_crypt(struct skcipher_request *req, bool encrypt)
246 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
247 const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
248 struct skcipher_walk walk;
253 err = skcipher_walk_virt(&walk, req, true);
258 K = &ctx->encrypt_expkey[0];
260 K = &ctx->decrypt_expkey[0];
261 des3_ede_sparc64_load_keys(K);
262 while ((nbytes = walk.nbytes) != 0) {
263 des3_ede_sparc64_ecb_crypt(K, walk.src.virt.addr,
265 round_down(nbytes, DES_BLOCK_SIZE));
266 err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
272 static int ecb3_encrypt(struct skcipher_request *req)
274 return __ecb3_crypt(req, true);
277 static int ecb3_decrypt(struct skcipher_request *req)
279 return __ecb3_crypt(req, false);
282 extern void des3_ede_sparc64_cbc_encrypt(const u64 *expkey, const u64 *input,
283 u64 *output, unsigned int len,
286 extern void des3_ede_sparc64_cbc_decrypt(const u64 *expkey, const u64 *input,
287 u64 *output, unsigned int len,
290 static int __cbc3_crypt(struct skcipher_request *req, bool encrypt)
292 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
293 const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
294 struct skcipher_walk walk;
299 err = skcipher_walk_virt(&walk, req, true);
304 K = &ctx->encrypt_expkey[0];
306 K = &ctx->decrypt_expkey[0];
307 des3_ede_sparc64_load_keys(K);
308 while ((nbytes = walk.nbytes) != 0) {
310 des3_ede_sparc64_cbc_encrypt(K, walk.src.virt.addr,
316 des3_ede_sparc64_cbc_decrypt(K, walk.src.virt.addr,
321 err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
327 static int cbc3_encrypt(struct skcipher_request *req)
329 return __cbc3_crypt(req, true);
332 static int cbc3_decrypt(struct skcipher_request *req)
334 return __cbc3_crypt(req, false);
337 static struct crypto_alg cipher_algs[] = {
340 .cra_driver_name = "des-sparc64",
341 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
342 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
343 .cra_blocksize = DES_BLOCK_SIZE,
344 .cra_ctxsize = sizeof(struct des_sparc64_ctx),
346 .cra_module = THIS_MODULE,
349 .cia_min_keysize = DES_KEY_SIZE,
350 .cia_max_keysize = DES_KEY_SIZE,
351 .cia_setkey = des_set_key,
352 .cia_encrypt = sparc_des_encrypt,
353 .cia_decrypt = sparc_des_decrypt
357 .cra_name = "des3_ede",
358 .cra_driver_name = "des3_ede-sparc64",
359 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
360 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
361 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
362 .cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
364 .cra_module = THIS_MODULE,
367 .cia_min_keysize = DES3_EDE_KEY_SIZE,
368 .cia_max_keysize = DES3_EDE_KEY_SIZE,
369 .cia_setkey = des3_ede_set_key,
370 .cia_encrypt = sparc_des3_ede_encrypt,
371 .cia_decrypt = sparc_des3_ede_decrypt
377 static struct skcipher_alg skcipher_algs[] = {
379 .base.cra_name = "ecb(des)",
380 .base.cra_driver_name = "ecb-des-sparc64",
381 .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
382 .base.cra_blocksize = DES_BLOCK_SIZE,
383 .base.cra_ctxsize = sizeof(struct des_sparc64_ctx),
384 .base.cra_alignmask = 7,
385 .base.cra_module = THIS_MODULE,
386 .min_keysize = DES_KEY_SIZE,
387 .max_keysize = DES_KEY_SIZE,
388 .setkey = des_set_key_skcipher,
389 .encrypt = ecb_encrypt,
390 .decrypt = ecb_decrypt,
392 .base.cra_name = "cbc(des)",
393 .base.cra_driver_name = "cbc-des-sparc64",
394 .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
395 .base.cra_blocksize = DES_BLOCK_SIZE,
396 .base.cra_ctxsize = sizeof(struct des_sparc64_ctx),
397 .base.cra_alignmask = 7,
398 .base.cra_module = THIS_MODULE,
399 .min_keysize = DES_KEY_SIZE,
400 .max_keysize = DES_KEY_SIZE,
401 .ivsize = DES_BLOCK_SIZE,
402 .setkey = des_set_key_skcipher,
403 .encrypt = cbc_encrypt,
404 .decrypt = cbc_decrypt,
406 .base.cra_name = "ecb(des3_ede)",
407 .base.cra_driver_name = "ecb-des3_ede-sparc64",
408 .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
409 .base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
410 .base.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
411 .base.cra_alignmask = 7,
412 .base.cra_module = THIS_MODULE,
413 .min_keysize = DES3_EDE_KEY_SIZE,
414 .max_keysize = DES3_EDE_KEY_SIZE,
415 .setkey = des3_ede_set_key_skcipher,
416 .encrypt = ecb3_encrypt,
417 .decrypt = ecb3_decrypt,
419 .base.cra_name = "cbc(des3_ede)",
420 .base.cra_driver_name = "cbc-des3_ede-sparc64",
421 .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
422 .base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
423 .base.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
424 .base.cra_alignmask = 7,
425 .base.cra_module = THIS_MODULE,
426 .min_keysize = DES3_EDE_KEY_SIZE,
427 .max_keysize = DES3_EDE_KEY_SIZE,
428 .ivsize = DES3_EDE_BLOCK_SIZE,
429 .setkey = des3_ede_set_key_skcipher,
430 .encrypt = cbc3_encrypt,
431 .decrypt = cbc3_decrypt,
435 static bool __init sparc64_has_des_opcode(void)
439 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
442 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
443 if (!(cfr & CFR_DES))
449 static int __init des_sparc64_mod_init(void)
453 if (!sparc64_has_des_opcode()) {
454 pr_info("sparc64 des opcodes not available.\n");
457 pr_info("Using sparc64 des opcodes optimized DES implementation\n");
458 err = crypto_register_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
461 err = crypto_register_skciphers(skcipher_algs,
462 ARRAY_SIZE(skcipher_algs));
464 crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
468 static void __exit des_sparc64_mod_fini(void)
470 crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
471 crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
474 module_init(des_sparc64_mod_init);
475 module_exit(des_sparc64_mod_fini);
477 MODULE_LICENSE("GPL");
478 MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms, sparc64 des opcode accelerated");
480 MODULE_ALIAS_CRYPTO("des");
481 MODULE_ALIAS_CRYPTO("des3_ede");
483 #include "crop_devid.c"