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11#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/crypto.h>
14#include <linux/err.h>
15#include <crypto/algapi.h>
16#include <crypto/internal/simd.h>
17#include <crypto/serpent.h>
18#include <crypto/xts.h>
19#include <asm/crypto/glue_helper.h>
20#include <asm/crypto/serpent-avx.h>
21
22
23asmlinkage void serpent_ecb_enc_8way_avx(const void *ctx, u8 *dst,
24 const u8 *src);
25EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx);
26
27asmlinkage void serpent_ecb_dec_8way_avx(const void *ctx, u8 *dst,
28 const u8 *src);
29EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx);
30
31asmlinkage void serpent_cbc_dec_8way_avx(const void *ctx, u8 *dst,
32 const u8 *src);
33EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx);
34
35asmlinkage void serpent_ctr_8way_avx(const void *ctx, u8 *dst, const u8 *src,
36 le128 *iv);
37EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx);
38
39asmlinkage void serpent_xts_enc_8way_avx(const void *ctx, u8 *dst,
40 const u8 *src, le128 *iv);
41EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx);
42
43asmlinkage void serpent_xts_dec_8way_avx(const void *ctx, u8 *dst,
44 const u8 *src, le128 *iv);
45EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx);
46
47void __serpent_crypt_ctr(const void *ctx, u8 *d, const u8 *s, le128 *iv)
48{
49 be128 ctrblk;
50 u128 *dst = (u128 *)d;
51 const u128 *src = (const u128 *)s;
52
53 le128_to_be128(&ctrblk, iv);
54 le128_inc(iv);
55
56 __serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
57 u128_xor(dst, src, (u128 *)&ctrblk);
58}
59EXPORT_SYMBOL_GPL(__serpent_crypt_ctr);
60
61void serpent_xts_enc(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
62{
63 glue_xts_crypt_128bit_one(ctx, dst, src, iv, __serpent_encrypt);
64}
65EXPORT_SYMBOL_GPL(serpent_xts_enc);
66
67void serpent_xts_dec(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
68{
69 glue_xts_crypt_128bit_one(ctx, dst, src, iv, __serpent_decrypt);
70}
71EXPORT_SYMBOL_GPL(serpent_xts_dec);
72
73static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
74 const u8 *key, unsigned int keylen)
75{
76 return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
77}
78
79int xts_serpent_setkey(struct crypto_skcipher *tfm, const u8 *key,
80 unsigned int keylen)
81{
82 struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
83 int err;
84
85 err = xts_verify_key(tfm, key, keylen);
86 if (err)
87 return err;
88
89
90 err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2);
91 if (err)
92 return err;
93
94
95 return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
96}
97EXPORT_SYMBOL_GPL(xts_serpent_setkey);
98
99static const struct common_glue_ctx serpent_enc = {
100 .num_funcs = 2,
101 .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
102
103 .funcs = { {
104 .num_blocks = SERPENT_PARALLEL_BLOCKS,
105 .fn_u = { .ecb = serpent_ecb_enc_8way_avx }
106 }, {
107 .num_blocks = 1,
108 .fn_u = { .ecb = __serpent_encrypt }
109 } }
110};
111
112static const struct common_glue_ctx serpent_ctr = {
113 .num_funcs = 2,
114 .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
115
116 .funcs = { {
117 .num_blocks = SERPENT_PARALLEL_BLOCKS,
118 .fn_u = { .ctr = serpent_ctr_8way_avx }
119 }, {
120 .num_blocks = 1,
121 .fn_u = { .ctr = __serpent_crypt_ctr }
122 } }
123};
124
125static const struct common_glue_ctx serpent_enc_xts = {
126 .num_funcs = 2,
127 .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
128
129 .funcs = { {
130 .num_blocks = SERPENT_PARALLEL_BLOCKS,
131 .fn_u = { .xts = serpent_xts_enc_8way_avx }
132 }, {
133 .num_blocks = 1,
134 .fn_u = { .xts = serpent_xts_enc }
135 } }
136};
137
138static const struct common_glue_ctx serpent_dec = {
139 .num_funcs = 2,
140 .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
141
142 .funcs = { {
143 .num_blocks = SERPENT_PARALLEL_BLOCKS,
144 .fn_u = { .ecb = serpent_ecb_dec_8way_avx }
145 }, {
146 .num_blocks = 1,
147 .fn_u = { .ecb = __serpent_decrypt }
148 } }
149};
150
151static const struct common_glue_ctx serpent_dec_cbc = {
152 .num_funcs = 2,
153 .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
154
155 .funcs = { {
156 .num_blocks = SERPENT_PARALLEL_BLOCKS,
157 .fn_u = { .cbc = serpent_cbc_dec_8way_avx }
158 }, {
159 .num_blocks = 1,
160 .fn_u = { .cbc = __serpent_decrypt }
161 } }
162};
163
164static const struct common_glue_ctx serpent_dec_xts = {
165 .num_funcs = 2,
166 .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
167
168 .funcs = { {
169 .num_blocks = SERPENT_PARALLEL_BLOCKS,
170 .fn_u = { .xts = serpent_xts_dec_8way_avx }
171 }, {
172 .num_blocks = 1,
173 .fn_u = { .xts = serpent_xts_dec }
174 } }
175};
176
177static int ecb_encrypt(struct skcipher_request *req)
178{
179 return glue_ecb_req_128bit(&serpent_enc, req);
180}
181
182static int ecb_decrypt(struct skcipher_request *req)
183{
184 return glue_ecb_req_128bit(&serpent_dec, req);
185}
186
187static int cbc_encrypt(struct skcipher_request *req)
188{
189 return glue_cbc_encrypt_req_128bit(__serpent_encrypt, req);
190}
191
192static int cbc_decrypt(struct skcipher_request *req)
193{
194 return glue_cbc_decrypt_req_128bit(&serpent_dec_cbc, req);
195}
196
197static int ctr_crypt(struct skcipher_request *req)
198{
199 return glue_ctr_req_128bit(&serpent_ctr, req);
200}
201
202static int xts_encrypt(struct skcipher_request *req)
203{
204 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
205 struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
206
207 return glue_xts_req_128bit(&serpent_enc_xts, req,
208 __serpent_encrypt, &ctx->tweak_ctx,
209 &ctx->crypt_ctx, false);
210}
211
212static int xts_decrypt(struct skcipher_request *req)
213{
214 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
215 struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
216
217 return glue_xts_req_128bit(&serpent_dec_xts, req,
218 __serpent_encrypt, &ctx->tweak_ctx,
219 &ctx->crypt_ctx, true);
220}
221
222static struct skcipher_alg serpent_algs[] = {
223 {
224 .base.cra_name = "__ecb(serpent)",
225 .base.cra_driver_name = "__ecb-serpent-avx",
226 .base.cra_priority = 500,
227 .base.cra_flags = CRYPTO_ALG_INTERNAL,
228 .base.cra_blocksize = SERPENT_BLOCK_SIZE,
229 .base.cra_ctxsize = sizeof(struct serpent_ctx),
230 .base.cra_module = THIS_MODULE,
231 .min_keysize = SERPENT_MIN_KEY_SIZE,
232 .max_keysize = SERPENT_MAX_KEY_SIZE,
233 .setkey = serpent_setkey_skcipher,
234 .encrypt = ecb_encrypt,
235 .decrypt = ecb_decrypt,
236 }, {
237 .base.cra_name = "__cbc(serpent)",
238 .base.cra_driver_name = "__cbc-serpent-avx",
239 .base.cra_priority = 500,
240 .base.cra_flags = CRYPTO_ALG_INTERNAL,
241 .base.cra_blocksize = SERPENT_BLOCK_SIZE,
242 .base.cra_ctxsize = sizeof(struct serpent_ctx),
243 .base.cra_module = THIS_MODULE,
244 .min_keysize = SERPENT_MIN_KEY_SIZE,
245 .max_keysize = SERPENT_MAX_KEY_SIZE,
246 .ivsize = SERPENT_BLOCK_SIZE,
247 .setkey = serpent_setkey_skcipher,
248 .encrypt = cbc_encrypt,
249 .decrypt = cbc_decrypt,
250 }, {
251 .base.cra_name = "__ctr(serpent)",
252 .base.cra_driver_name = "__ctr-serpent-avx",
253 .base.cra_priority = 500,
254 .base.cra_flags = CRYPTO_ALG_INTERNAL,
255 .base.cra_blocksize = 1,
256 .base.cra_ctxsize = sizeof(struct serpent_ctx),
257 .base.cra_module = THIS_MODULE,
258 .min_keysize = SERPENT_MIN_KEY_SIZE,
259 .max_keysize = SERPENT_MAX_KEY_SIZE,
260 .ivsize = SERPENT_BLOCK_SIZE,
261 .chunksize = SERPENT_BLOCK_SIZE,
262 .setkey = serpent_setkey_skcipher,
263 .encrypt = ctr_crypt,
264 .decrypt = ctr_crypt,
265 }, {
266 .base.cra_name = "__xts(serpent)",
267 .base.cra_driver_name = "__xts-serpent-avx",
268 .base.cra_priority = 500,
269 .base.cra_flags = CRYPTO_ALG_INTERNAL,
270 .base.cra_blocksize = SERPENT_BLOCK_SIZE,
271 .base.cra_ctxsize = sizeof(struct serpent_xts_ctx),
272 .base.cra_module = THIS_MODULE,
273 .min_keysize = 2 * SERPENT_MIN_KEY_SIZE,
274 .max_keysize = 2 * SERPENT_MAX_KEY_SIZE,
275 .ivsize = SERPENT_BLOCK_SIZE,
276 .setkey = xts_serpent_setkey,
277 .encrypt = xts_encrypt,
278 .decrypt = xts_decrypt,
279 },
280};
281
282static struct simd_skcipher_alg *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];
283
284static int __init serpent_init(void)
285{
286 const char *feature_name;
287
288 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
289 &feature_name)) {
290 pr_info("CPU feature '%s' is not supported.\n", feature_name);
291 return -ENODEV;
292 }
293
294 return simd_register_skciphers_compat(serpent_algs,
295 ARRAY_SIZE(serpent_algs),
296 serpent_simd_algs);
297}
298
299static void __exit serpent_exit(void)
300{
301 simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
302 serpent_simd_algs);
303}
304
305module_init(serpent_init);
306module_exit(serpent_exit);
307
308MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized");
309MODULE_LICENSE("GPL");
310MODULE_ALIAS_CRYPTO("serpent");
311
