iwlwifi: mvm: fix version check for GEO_TX_POWER_LIMIT support
[linux/fpc-iii.git] / arch / x86 / crypto / morus1280_glue.c
blob7e600f8bcdad83a3db04eb75579856e79cdd6d40
1 /*
2 * The MORUS-1280 Authenticated-Encryption Algorithm
3 * Common x86 SIMD glue skeleton
5 * Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
6 * Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
14 #include <crypto/cryptd.h>
15 #include <crypto/internal/aead.h>
16 #include <crypto/internal/skcipher.h>
17 #include <crypto/morus1280_glue.h>
18 #include <crypto/scatterwalk.h>
19 #include <linux/err.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/scatterlist.h>
24 #include <asm/fpu/api.h>
26 struct morus1280_state {
27 struct morus1280_block s[MORUS_STATE_BLOCKS];
30 struct morus1280_ops {
31 int (*skcipher_walk_init)(struct skcipher_walk *walk,
32 struct aead_request *req, bool atomic);
34 void (*crypt_blocks)(void *state, const void *src, void *dst,
35 unsigned int length);
36 void (*crypt_tail)(void *state, const void *src, void *dst,
37 unsigned int length);
40 static void crypto_morus1280_glue_process_ad(
41 struct morus1280_state *state,
42 const struct morus1280_glue_ops *ops,
43 struct scatterlist *sg_src, unsigned int assoclen)
45 struct scatter_walk walk;
46 struct morus1280_block buf;
47 unsigned int pos = 0;
49 scatterwalk_start(&walk, sg_src);
50 while (assoclen != 0) {
51 unsigned int size = scatterwalk_clamp(&walk, assoclen);
52 unsigned int left = size;
53 void *mapped = scatterwalk_map(&walk);
54 const u8 *src = (const u8 *)mapped;
56 if (pos + size >= MORUS1280_BLOCK_SIZE) {
57 if (pos > 0) {
58 unsigned int fill = MORUS1280_BLOCK_SIZE - pos;
59 memcpy(buf.bytes + pos, src, fill);
60 ops->ad(state, buf.bytes, MORUS1280_BLOCK_SIZE);
61 pos = 0;
62 left -= fill;
63 src += fill;
66 ops->ad(state, src, left);
67 src += left & ~(MORUS1280_BLOCK_SIZE - 1);
68 left &= MORUS1280_BLOCK_SIZE - 1;
71 memcpy(buf.bytes + pos, src, left);
73 pos += left;
74 assoclen -= size;
75 scatterwalk_unmap(mapped);
76 scatterwalk_advance(&walk, size);
77 scatterwalk_done(&walk, 0, assoclen);
80 if (pos > 0) {
81 memset(buf.bytes + pos, 0, MORUS1280_BLOCK_SIZE - pos);
82 ops->ad(state, buf.bytes, MORUS1280_BLOCK_SIZE);
86 static void crypto_morus1280_glue_process_crypt(struct morus1280_state *state,
87 struct morus1280_ops ops,
88 struct skcipher_walk *walk)
90 while (walk->nbytes >= MORUS1280_BLOCK_SIZE) {
91 ops.crypt_blocks(state, walk->src.virt.addr,
92 walk->dst.virt.addr,
93 round_down(walk->nbytes,
94 MORUS1280_BLOCK_SIZE));
95 skcipher_walk_done(walk, walk->nbytes % MORUS1280_BLOCK_SIZE);
98 if (walk->nbytes) {
99 ops.crypt_tail(state, walk->src.virt.addr, walk->dst.virt.addr,
100 walk->nbytes);
101 skcipher_walk_done(walk, 0);
105 int crypto_morus1280_glue_setkey(struct crypto_aead *aead, const u8 *key,
106 unsigned int keylen)
108 struct morus1280_ctx *ctx = crypto_aead_ctx(aead);
110 if (keylen == MORUS1280_BLOCK_SIZE) {
111 memcpy(ctx->key.bytes, key, MORUS1280_BLOCK_SIZE);
112 } else if (keylen == MORUS1280_BLOCK_SIZE / 2) {
113 memcpy(ctx->key.bytes, key, keylen);
114 memcpy(ctx->key.bytes + keylen, key, keylen);
115 } else {
116 crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
117 return -EINVAL;
120 return 0;
122 EXPORT_SYMBOL_GPL(crypto_morus1280_glue_setkey);
124 int crypto_morus1280_glue_setauthsize(struct crypto_aead *tfm,
125 unsigned int authsize)
127 return (authsize <= MORUS_MAX_AUTH_SIZE) ? 0 : -EINVAL;
129 EXPORT_SYMBOL_GPL(crypto_morus1280_glue_setauthsize);
131 static void crypto_morus1280_glue_crypt(struct aead_request *req,
132 struct morus1280_ops ops,
133 unsigned int cryptlen,
134 struct morus1280_block *tag_xor)
136 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
137 struct morus1280_ctx *ctx = crypto_aead_ctx(tfm);
138 struct morus1280_state state;
139 struct skcipher_walk walk;
141 ops.skcipher_walk_init(&walk, req, true);
143 kernel_fpu_begin();
145 ctx->ops->init(&state, &ctx->key, req->iv);
146 crypto_morus1280_glue_process_ad(&state, ctx->ops, req->src, req->assoclen);
147 crypto_morus1280_glue_process_crypt(&state, ops, &walk);
148 ctx->ops->final(&state, tag_xor, req->assoclen, cryptlen);
150 kernel_fpu_end();
153 int crypto_morus1280_glue_encrypt(struct aead_request *req)
155 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
156 struct morus1280_ctx *ctx = crypto_aead_ctx(tfm);
157 struct morus1280_ops OPS = {
158 .skcipher_walk_init = skcipher_walk_aead_encrypt,
159 .crypt_blocks = ctx->ops->enc,
160 .crypt_tail = ctx->ops->enc_tail,
163 struct morus1280_block tag = {};
164 unsigned int authsize = crypto_aead_authsize(tfm);
165 unsigned int cryptlen = req->cryptlen;
167 crypto_morus1280_glue_crypt(req, OPS, cryptlen, &tag);
169 scatterwalk_map_and_copy(tag.bytes, req->dst,
170 req->assoclen + cryptlen, authsize, 1);
171 return 0;
173 EXPORT_SYMBOL_GPL(crypto_morus1280_glue_encrypt);
175 int crypto_morus1280_glue_decrypt(struct aead_request *req)
177 static const u8 zeros[MORUS1280_BLOCK_SIZE] = {};
179 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
180 struct morus1280_ctx *ctx = crypto_aead_ctx(tfm);
181 struct morus1280_ops OPS = {
182 .skcipher_walk_init = skcipher_walk_aead_decrypt,
183 .crypt_blocks = ctx->ops->dec,
184 .crypt_tail = ctx->ops->dec_tail,
187 struct morus1280_block tag;
188 unsigned int authsize = crypto_aead_authsize(tfm);
189 unsigned int cryptlen = req->cryptlen - authsize;
191 scatterwalk_map_and_copy(tag.bytes, req->src,
192 req->assoclen + cryptlen, authsize, 0);
194 crypto_morus1280_glue_crypt(req, OPS, cryptlen, &tag);
196 return crypto_memneq(tag.bytes, zeros, authsize) ? -EBADMSG : 0;
198 EXPORT_SYMBOL_GPL(crypto_morus1280_glue_decrypt);
200 void crypto_morus1280_glue_init_ops(struct crypto_aead *aead,
201 const struct morus1280_glue_ops *ops)
203 struct morus1280_ctx *ctx = crypto_aead_ctx(aead);
204 ctx->ops = ops;
206 EXPORT_SYMBOL_GPL(crypto_morus1280_glue_init_ops);
208 int cryptd_morus1280_glue_setkey(struct crypto_aead *aead, const u8 *key,
209 unsigned int keylen)
211 struct cryptd_aead **ctx = crypto_aead_ctx(aead);
212 struct cryptd_aead *cryptd_tfm = *ctx;
214 return crypto_aead_setkey(&cryptd_tfm->base, key, keylen);
216 EXPORT_SYMBOL_GPL(cryptd_morus1280_glue_setkey);
218 int cryptd_morus1280_glue_setauthsize(struct crypto_aead *aead,
219 unsigned int authsize)
221 struct cryptd_aead **ctx = crypto_aead_ctx(aead);
222 struct cryptd_aead *cryptd_tfm = *ctx;
224 return crypto_aead_setauthsize(&cryptd_tfm->base, authsize);
226 EXPORT_SYMBOL_GPL(cryptd_morus1280_glue_setauthsize);
228 int cryptd_morus1280_glue_encrypt(struct aead_request *req)
230 struct crypto_aead *aead = crypto_aead_reqtfm(req);
231 struct cryptd_aead **ctx = crypto_aead_ctx(aead);
232 struct cryptd_aead *cryptd_tfm = *ctx;
234 aead = &cryptd_tfm->base;
235 if (irq_fpu_usable() && (!in_atomic() ||
236 !cryptd_aead_queued(cryptd_tfm)))
237 aead = cryptd_aead_child(cryptd_tfm);
239 aead_request_set_tfm(req, aead);
241 return crypto_aead_encrypt(req);
243 EXPORT_SYMBOL_GPL(cryptd_morus1280_glue_encrypt);
245 int cryptd_morus1280_glue_decrypt(struct aead_request *req)
247 struct crypto_aead *aead = crypto_aead_reqtfm(req);
248 struct cryptd_aead **ctx = crypto_aead_ctx(aead);
249 struct cryptd_aead *cryptd_tfm = *ctx;
251 aead = &cryptd_tfm->base;
252 if (irq_fpu_usable() && (!in_atomic() ||
253 !cryptd_aead_queued(cryptd_tfm)))
254 aead = cryptd_aead_child(cryptd_tfm);
256 aead_request_set_tfm(req, aead);
258 return crypto_aead_decrypt(req);
260 EXPORT_SYMBOL_GPL(cryptd_morus1280_glue_decrypt);
262 int cryptd_morus1280_glue_init_tfm(struct crypto_aead *aead)
264 struct cryptd_aead *cryptd_tfm;
265 struct cryptd_aead **ctx = crypto_aead_ctx(aead);
266 const char *name = crypto_aead_alg(aead)->base.cra_driver_name;
267 char internal_name[CRYPTO_MAX_ALG_NAME];
269 if (snprintf(internal_name, CRYPTO_MAX_ALG_NAME, "__%s", name)
270 >= CRYPTO_MAX_ALG_NAME)
271 return -ENAMETOOLONG;
273 cryptd_tfm = cryptd_alloc_aead(internal_name, CRYPTO_ALG_INTERNAL,
274 CRYPTO_ALG_INTERNAL);
275 if (IS_ERR(cryptd_tfm))
276 return PTR_ERR(cryptd_tfm);
278 *ctx = cryptd_tfm;
279 crypto_aead_set_reqsize(aead, crypto_aead_reqsize(&cryptd_tfm->base));
280 return 0;
282 EXPORT_SYMBOL_GPL(cryptd_morus1280_glue_init_tfm);
284 void cryptd_morus1280_glue_exit_tfm(struct crypto_aead *aead)
286 struct cryptd_aead **ctx = crypto_aead_ctx(aead);
288 cryptd_free_aead(*ctx);
290 EXPORT_SYMBOL_GPL(cryptd_morus1280_glue_exit_tfm);
292 MODULE_LICENSE("GPL");
293 MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>");
294 MODULE_DESCRIPTION("MORUS-1280 AEAD mode -- glue for x86 optimizations");