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64d85cc9 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
10cb823b | 2 | /* |
f2a15f1d KY |
3 | * AES GCM routines supporting the Power 7+ Nest Accelerators driver |
4 | * | |
5 | * Copyright (C) 2012 International Business Machines Inc. | |
6 | * | |
f2a15f1d KY |
7 | * Author: Kent Yoder <yoder1@us.ibm.com> |
8 | */ | |
9 | ||
10 | #include <crypto/internal/aead.h> | |
11 | #include <crypto/aes.h> | |
cb8affb5 | 12 | #include <crypto/algapi.h> |
fdd0f3d8 | 13 | #include <crypto/gcm.h> |
f2a15f1d KY |
14 | #include <crypto/scatterwalk.h> |
15 | #include <linux/module.h> | |
16 | #include <linux/types.h> | |
f2a15f1d KY |
17 | #include <asm/vio.h> |
18 | ||
19 | #include "nx_csbcpb.h" | |
20 | #include "nx.h" | |
21 | ||
22 | ||
23 | static int gcm_aes_nx_set_key(struct crypto_aead *tfm, | |
24 | const u8 *in_key, | |
25 | unsigned int key_len) | |
26 | { | |
c3d21949 | 27 | struct nx_crypto_ctx *nx_ctx = crypto_aead_ctx(tfm); |
f2a15f1d KY |
28 | struct nx_csbcpb *csbcpb = nx_ctx->csbcpb; |
29 | struct nx_csbcpb *csbcpb_aead = nx_ctx->csbcpb_aead; | |
30 | ||
31 | nx_ctx_init(nx_ctx, HCOP_FC_AES); | |
32 | ||
33 | switch (key_len) { | |
34 | case AES_KEYSIZE_128: | |
35 | NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128); | |
36 | NX_CPB_SET_KEY_SIZE(csbcpb_aead, NX_KS_AES_128); | |
37 | nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128]; | |
38 | break; | |
39 | case AES_KEYSIZE_192: | |
40 | NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_192); | |
41 | NX_CPB_SET_KEY_SIZE(csbcpb_aead, NX_KS_AES_192); | |
42 | nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192]; | |
43 | break; | |
44 | case AES_KEYSIZE_256: | |
45 | NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_256); | |
46 | NX_CPB_SET_KEY_SIZE(csbcpb_aead, NX_KS_AES_256); | |
47 | nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_256]; | |
48 | break; | |
49 | default: | |
50 | return -EINVAL; | |
51 | } | |
52 | ||
53 | csbcpb->cpb.hdr.mode = NX_MODE_AES_GCM; | |
54 | memcpy(csbcpb->cpb.aes_gcm.key, in_key, key_len); | |
55 | ||
56 | csbcpb_aead->cpb.hdr.mode = NX_MODE_AES_GCA; | |
57 | memcpy(csbcpb_aead->cpb.aes_gca.key, in_key, key_len); | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | static int gcm4106_aes_nx_set_key(struct crypto_aead *tfm, | |
63 | const u8 *in_key, | |
64 | unsigned int key_len) | |
65 | { | |
c3d21949 | 66 | struct nx_crypto_ctx *nx_ctx = crypto_aead_ctx(tfm); |
f2a15f1d KY |
67 | char *nonce = nx_ctx->priv.gcm.nonce; |
68 | int rc; | |
69 | ||
70 | if (key_len < 4) | |
71 | return -EINVAL; | |
72 | ||
73 | key_len -= 4; | |
74 | ||
75 | rc = gcm_aes_nx_set_key(tfm, in_key, key_len); | |
76 | if (rc) | |
77 | goto out; | |
78 | ||
79 | memcpy(nonce, in_key + key_len, 4); | |
80 | out: | |
81 | return rc; | |
82 | } | |
83 | ||
f2a15f1d KY |
84 | static int gcm4106_aes_nx_setauthsize(struct crypto_aead *tfm, |
85 | unsigned int authsize) | |
86 | { | |
87 | switch (authsize) { | |
88 | case 8: | |
89 | case 12: | |
90 | case 16: | |
91 | break; | |
92 | default: | |
93 | return -EINVAL; | |
94 | } | |
95 | ||
f2a15f1d KY |
96 | return 0; |
97 | } | |
98 | ||
99 | static int nx_gca(struct nx_crypto_ctx *nx_ctx, | |
100 | struct aead_request *req, | |
c3d21949 HX |
101 | u8 *out, |
102 | unsigned int assoclen) | |
f2a15f1d | 103 | { |
79980434 | 104 | int rc; |
f2a15f1d | 105 | struct nx_csbcpb *csbcpb_aead = nx_ctx->csbcpb_aead; |
f2a15f1d KY |
106 | struct scatter_walk walk; |
107 | struct nx_sg *nx_sg = nx_ctx->in_sg; | |
c3d21949 | 108 | unsigned int nbytes = assoclen; |
79980434 | 109 | unsigned int processed = 0, to_process; |
e13a79ac | 110 | unsigned int max_sg_len; |
f2a15f1d | 111 | |
79980434 | 112 | if (nbytes <= AES_BLOCK_SIZE) { |
201f28f0 | 113 | scatterwalk_start(&walk, req->src); |
79980434 | 114 | scatterwalk_copychunks(out, &walk, nbytes, SCATTERWALK_FROM_SG); |
f2a15f1d | 115 | scatterwalk_done(&walk, SCATTERWALK_FROM_SG, 0); |
79980434 | 116 | return 0; |
f2a15f1d KY |
117 | } |
118 | ||
79980434 | 119 | NX_CPB_FDM(csbcpb_aead) &= ~NX_FDM_CONTINUATION; |
f2a15f1d | 120 | |
79980434 | 121 | /* page_limit: number of sg entries that fit on one page */ |
e13a79ac | 122 | max_sg_len = min_t(u64, nx_driver.of.max_sg_len/sizeof(struct nx_sg), |
79980434 | 123 | nx_ctx->ap->sglen); |
e13a79ac LB |
124 | max_sg_len = min_t(u64, max_sg_len, |
125 | nx_ctx->ap->databytelen/NX_PAGE_SIZE); | |
f2a15f1d | 126 | |
79980434 MC |
127 | do { |
128 | /* | |
129 | * to_process: the data chunk to process in this update. | |
130 | * This value is bound by sg list limits. | |
131 | */ | |
132 | to_process = min_t(u64, nbytes - processed, | |
133 | nx_ctx->ap->databytelen); | |
134 | to_process = min_t(u64, to_process, | |
135 | NX_PAGE_SIZE * (max_sg_len - 1)); | |
136 | ||
e13a79ac | 137 | nx_sg = nx_walk_and_build(nx_ctx->in_sg, max_sg_len, |
201f28f0 | 138 | req->src, processed, &to_process); |
e13a79ac | 139 | |
79980434 MC |
140 | if ((to_process + processed) < nbytes) |
141 | NX_CPB_FDM(csbcpb_aead) |= NX_FDM_INTERMEDIATE; | |
142 | else | |
143 | NX_CPB_FDM(csbcpb_aead) &= ~NX_FDM_INTERMEDIATE; | |
144 | ||
79980434 MC |
145 | nx_ctx->op_aead.inlen = (nx_ctx->in_sg - nx_sg) |
146 | * sizeof(struct nx_sg); | |
147 | ||
148 | rc = nx_hcall_sync(nx_ctx, &nx_ctx->op_aead, | |
149 | req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP); | |
150 | if (rc) | |
151 | return rc; | |
152 | ||
153 | memcpy(csbcpb_aead->cpb.aes_gca.in_pat, | |
154 | csbcpb_aead->cpb.aes_gca.out_pat, | |
155 | AES_BLOCK_SIZE); | |
156 | NX_CPB_FDM(csbcpb_aead) |= NX_FDM_CONTINUATION; | |
157 | ||
158 | atomic_inc(&(nx_ctx->stats->aes_ops)); | |
c3d21949 | 159 | atomic64_add(assoclen, &(nx_ctx->stats->aes_bytes)); |
79980434 MC |
160 | |
161 | processed += to_process; | |
162 | } while (processed < nbytes); | |
f2a15f1d KY |
163 | |
164 | memcpy(out, csbcpb_aead->cpb.aes_gca.out_pat, AES_BLOCK_SIZE); | |
79980434 MC |
165 | |
166 | return rc; | |
167 | } | |
168 | ||
7740bd51 | 169 | static int gmac(struct aead_request *req, const u8 *iv, unsigned int assoclen) |
dec0ed6c MC |
170 | { |
171 | int rc; | |
c3d21949 HX |
172 | struct nx_crypto_ctx *nx_ctx = |
173 | crypto_aead_ctx(crypto_aead_reqtfm(req)); | |
dec0ed6c MC |
174 | struct nx_csbcpb *csbcpb = nx_ctx->csbcpb; |
175 | struct nx_sg *nx_sg; | |
c3d21949 | 176 | unsigned int nbytes = assoclen; |
dec0ed6c | 177 | unsigned int processed = 0, to_process; |
e13a79ac | 178 | unsigned int max_sg_len; |
dec0ed6c MC |
179 | |
180 | /* Set GMAC mode */ | |
181 | csbcpb->cpb.hdr.mode = NX_MODE_AES_GMAC; | |
182 | ||
183 | NX_CPB_FDM(csbcpb) &= ~NX_FDM_CONTINUATION; | |
184 | ||
185 | /* page_limit: number of sg entries that fit on one page */ | |
e13a79ac | 186 | max_sg_len = min_t(u64, nx_driver.of.max_sg_len/sizeof(struct nx_sg), |
dec0ed6c | 187 | nx_ctx->ap->sglen); |
e13a79ac LB |
188 | max_sg_len = min_t(u64, max_sg_len, |
189 | nx_ctx->ap->databytelen/NX_PAGE_SIZE); | |
dec0ed6c MC |
190 | |
191 | /* Copy IV */ | |
7740bd51 | 192 | memcpy(csbcpb->cpb.aes_gcm.iv_or_cnt, iv, AES_BLOCK_SIZE); |
dec0ed6c MC |
193 | |
194 | do { | |
195 | /* | |
196 | * to_process: the data chunk to process in this update. | |
197 | * This value is bound by sg list limits. | |
198 | */ | |
199 | to_process = min_t(u64, nbytes - processed, | |
200 | nx_ctx->ap->databytelen); | |
201 | to_process = min_t(u64, to_process, | |
202 | NX_PAGE_SIZE * (max_sg_len - 1)); | |
203 | ||
e13a79ac | 204 | nx_sg = nx_walk_and_build(nx_ctx->in_sg, max_sg_len, |
201f28f0 | 205 | req->src, processed, &to_process); |
e13a79ac | 206 | |
dec0ed6c MC |
207 | if ((to_process + processed) < nbytes) |
208 | NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE; | |
209 | else | |
210 | NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE; | |
211 | ||
dec0ed6c MC |
212 | nx_ctx->op.inlen = (nx_ctx->in_sg - nx_sg) |
213 | * sizeof(struct nx_sg); | |
214 | ||
215 | csbcpb->cpb.aes_gcm.bit_length_data = 0; | |
216 | csbcpb->cpb.aes_gcm.bit_length_aad = 8 * nbytes; | |
217 | ||
218 | rc = nx_hcall_sync(nx_ctx, &nx_ctx->op, | |
219 | req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP); | |
220 | if (rc) | |
221 | goto out; | |
222 | ||
223 | memcpy(csbcpb->cpb.aes_gcm.in_pat_or_aad, | |
224 | csbcpb->cpb.aes_gcm.out_pat_or_mac, AES_BLOCK_SIZE); | |
225 | memcpy(csbcpb->cpb.aes_gcm.in_s0, | |
226 | csbcpb->cpb.aes_gcm.out_s0, AES_BLOCK_SIZE); | |
227 | ||
228 | NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION; | |
229 | ||
230 | atomic_inc(&(nx_ctx->stats->aes_ops)); | |
c3d21949 | 231 | atomic64_add(assoclen, &(nx_ctx->stats->aes_bytes)); |
dec0ed6c MC |
232 | |
233 | processed += to_process; | |
234 | } while (processed < nbytes); | |
235 | ||
236 | out: | |
237 | /* Restore GCM mode */ | |
238 | csbcpb->cpb.hdr.mode = NX_MODE_AES_GCM; | |
239 | return rc; | |
240 | } | |
241 | ||
7740bd51 | 242 | static int gcm_empty(struct aead_request *req, const u8 *iv, int enc) |
79980434 MC |
243 | { |
244 | int rc; | |
c3d21949 HX |
245 | struct nx_crypto_ctx *nx_ctx = |
246 | crypto_aead_ctx(crypto_aead_reqtfm(req)); | |
79980434 | 247 | struct nx_csbcpb *csbcpb = nx_ctx->csbcpb; |
dec0ed6c MC |
248 | char out[AES_BLOCK_SIZE]; |
249 | struct nx_sg *in_sg, *out_sg; | |
e13a79ac | 250 | int len; |
79980434 MC |
251 | |
252 | /* For scenarios where the input message is zero length, AES CTR mode | |
253 | * may be used. Set the source data to be a single block (16B) of all | |
254 | * zeros, and set the input IV value to be the same as the GMAC IV | |
255 | * value. - nx_wb 4.8.1.3 */ | |
79980434 | 256 | |
dec0ed6c MC |
257 | /* Change to ECB mode */ |
258 | csbcpb->cpb.hdr.mode = NX_MODE_AES_ECB; | |
259 | memcpy(csbcpb->cpb.aes_ecb.key, csbcpb->cpb.aes_gcm.key, | |
260 | sizeof(csbcpb->cpb.aes_ecb.key)); | |
79980434 | 261 | if (enc) |
dec0ed6c | 262 | NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT; |
79980434 | 263 | else |
dec0ed6c MC |
264 | NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT; |
265 | ||
e13a79ac LB |
266 | len = AES_BLOCK_SIZE; |
267 | ||
dec0ed6c | 268 | /* Encrypt the counter/IV */ |
7740bd51 | 269 | in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *) iv, |
e13a79ac LB |
270 | &len, nx_ctx->ap->sglen); |
271 | ||
272 | if (len != AES_BLOCK_SIZE) | |
273 | return -EINVAL; | |
274 | ||
275 | len = sizeof(out); | |
276 | out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *) out, &len, | |
dec0ed6c | 277 | nx_ctx->ap->sglen); |
e13a79ac LB |
278 | |
279 | if (len != sizeof(out)) | |
280 | return -EINVAL; | |
281 | ||
dec0ed6c MC |
282 | nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg); |
283 | nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg); | |
79980434 | 284 | |
dec0ed6c | 285 | rc = nx_hcall_sync(nx_ctx, &nx_ctx->op, |
7740bd51 | 286 | req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP); |
dec0ed6c MC |
287 | if (rc) |
288 | goto out; | |
289 | atomic_inc(&(nx_ctx->stats->aes_ops)); | |
290 | ||
291 | /* Copy out the auth tag */ | |
292 | memcpy(csbcpb->cpb.aes_gcm.out_pat_or_mac, out, | |
293 | crypto_aead_authsize(crypto_aead_reqtfm(req))); | |
f2a15f1d | 294 | out: |
dec0ed6c MC |
295 | /* Restore XCBC mode */ |
296 | csbcpb->cpb.hdr.mode = NX_MODE_AES_GCM; | |
297 | ||
298 | /* | |
299 | * ECB key uses the same region that GCM AAD and counter, so it's safe | |
300 | * to just fill it with zeroes. | |
301 | */ | |
302 | memset(csbcpb->cpb.aes_ecb.key, 0, sizeof(csbcpb->cpb.aes_ecb.key)); | |
303 | ||
f2a15f1d KY |
304 | return rc; |
305 | } | |
306 | ||
c3d21949 HX |
307 | static int gcm_aes_nx_crypt(struct aead_request *req, int enc, |
308 | unsigned int assoclen) | |
f2a15f1d | 309 | { |
c3d21949 HX |
310 | struct nx_crypto_ctx *nx_ctx = |
311 | crypto_aead_ctx(crypto_aead_reqtfm(req)); | |
030f4e96 | 312 | struct nx_gcm_rctx *rctx = aead_request_ctx(req); |
f2a15f1d | 313 | struct nx_csbcpb *csbcpb = nx_ctx->csbcpb; |
f2a15f1d | 314 | unsigned int nbytes = req->cryptlen; |
79980434 | 315 | unsigned int processed = 0, to_process; |
c849163b | 316 | unsigned long irq_flags; |
f2a15f1d KY |
317 | int rc = -EINVAL; |
318 | ||
c849163b MC |
319 | spin_lock_irqsave(&nx_ctx->lock, irq_flags); |
320 | ||
f2a15f1d | 321 | /* initialize the counter */ |
7740bd51 | 322 | *(u32 *)&rctx->iv[NX_GCM_CTR_OFFSET] = 1; |
f2a15f1d | 323 | |
f2a15f1d | 324 | if (nbytes == 0) { |
c3d21949 | 325 | if (assoclen == 0) |
7740bd51 | 326 | rc = gcm_empty(req, rctx->iv, enc); |
dec0ed6c | 327 | else |
7740bd51 | 328 | rc = gmac(req, rctx->iv, assoclen); |
dec0ed6c MC |
329 | if (rc) |
330 | goto out; | |
331 | else | |
332 | goto mac; | |
f2a15f1d KY |
333 | } |
334 | ||
79980434 | 335 | /* Process associated data */ |
c3d21949 HX |
336 | csbcpb->cpb.aes_gcm.bit_length_aad = assoclen * 8; |
337 | if (assoclen) { | |
338 | rc = nx_gca(nx_ctx, req, csbcpb->cpb.aes_gcm.in_pat_or_aad, | |
339 | assoclen); | |
f2a15f1d KY |
340 | if (rc) |
341 | goto out; | |
342 | } | |
343 | ||
79980434 MC |
344 | /* Set flags for encryption */ |
345 | NX_CPB_FDM(csbcpb) &= ~NX_FDM_CONTINUATION; | |
346 | if (enc) { | |
f2a15f1d | 347 | NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT; |
79980434 MC |
348 | } else { |
349 | NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT; | |
1ad936e8 | 350 | nbytes -= crypto_aead_authsize(crypto_aead_reqtfm(req)); |
79980434 | 351 | } |
f2a15f1d | 352 | |
79980434 | 353 | do { |
e13a79ac | 354 | to_process = nbytes - processed; |
f2a15f1d | 355 | |
79980434 | 356 | csbcpb->cpb.aes_gcm.bit_length_data = nbytes * 8; |
7740bd51 | 357 | rc = nx_build_sg_lists(nx_ctx, rctx->iv, req->dst, |
201f28f0 HX |
358 | req->src, &to_process, |
359 | processed + req->assoclen, | |
79980434 | 360 | csbcpb->cpb.aes_gcm.iv_or_cnt); |
e13a79ac | 361 | |
79980434 MC |
362 | if (rc) |
363 | goto out; | |
f2a15f1d | 364 | |
e13a79ac LB |
365 | if ((to_process + processed) < nbytes) |
366 | NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE; | |
367 | else | |
368 | NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE; | |
369 | ||
370 | ||
79980434 MC |
371 | rc = nx_hcall_sync(nx_ctx, &nx_ctx->op, |
372 | req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP); | |
373 | if (rc) | |
374 | goto out; | |
375 | ||
7740bd51 | 376 | memcpy(rctx->iv, csbcpb->cpb.aes_gcm.out_cnt, AES_BLOCK_SIZE); |
79980434 MC |
377 | memcpy(csbcpb->cpb.aes_gcm.in_pat_or_aad, |
378 | csbcpb->cpb.aes_gcm.out_pat_or_mac, AES_BLOCK_SIZE); | |
379 | memcpy(csbcpb->cpb.aes_gcm.in_s0, | |
380 | csbcpb->cpb.aes_gcm.out_s0, AES_BLOCK_SIZE); | |
381 | ||
382 | NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION; | |
383 | ||
384 | atomic_inc(&(nx_ctx->stats->aes_ops)); | |
b20d9a73 | 385 | atomic64_add(be32_to_cpu(csbcpb->csb.processed_byte_count), |
79980434 | 386 | &(nx_ctx->stats->aes_bytes)); |
f2a15f1d | 387 | |
79980434 MC |
388 | processed += to_process; |
389 | } while (processed < nbytes); | |
f2a15f1d | 390 | |
dec0ed6c | 391 | mac: |
f2a15f1d KY |
392 | if (enc) { |
393 | /* copy out the auth tag */ | |
201f28f0 HX |
394 | scatterwalk_map_and_copy( |
395 | csbcpb->cpb.aes_gcm.out_pat_or_mac, | |
396 | req->dst, req->assoclen + nbytes, | |
397 | crypto_aead_authsize(crypto_aead_reqtfm(req)), | |
398 | SCATTERWALK_TO_SG); | |
b4eba0ca | 399 | } else { |
f2a15f1d KY |
400 | u8 *itag = nx_ctx->priv.gcm.iauth_tag; |
401 | u8 *otag = csbcpb->cpb.aes_gcm.out_pat_or_mac; | |
402 | ||
201f28f0 HX |
403 | scatterwalk_map_and_copy( |
404 | itag, req->src, req->assoclen + nbytes, | |
405 | crypto_aead_authsize(crypto_aead_reqtfm(req)), | |
406 | SCATTERWALK_FROM_SG); | |
cb8affb5 | 407 | rc = crypto_memneq(itag, otag, |
f2a15f1d KY |
408 | crypto_aead_authsize(crypto_aead_reqtfm(req))) ? |
409 | -EBADMSG : 0; | |
410 | } | |
411 | out: | |
c849163b | 412 | spin_unlock_irqrestore(&nx_ctx->lock, irq_flags); |
f2a15f1d KY |
413 | return rc; |
414 | } | |
415 | ||
416 | static int gcm_aes_nx_encrypt(struct aead_request *req) | |
417 | { | |
030f4e96 HX |
418 | struct nx_gcm_rctx *rctx = aead_request_ctx(req); |
419 | char *iv = rctx->iv; | |
f2a15f1d | 420 | |
fdd0f3d8 | 421 | memcpy(iv, req->iv, GCM_AES_IV_SIZE); |
f2a15f1d | 422 | |
c3d21949 | 423 | return gcm_aes_nx_crypt(req, 1, req->assoclen); |
f2a15f1d KY |
424 | } |
425 | ||
426 | static int gcm_aes_nx_decrypt(struct aead_request *req) | |
427 | { | |
030f4e96 HX |
428 | struct nx_gcm_rctx *rctx = aead_request_ctx(req); |
429 | char *iv = rctx->iv; | |
f2a15f1d | 430 | |
fdd0f3d8 | 431 | memcpy(iv, req->iv, GCM_AES_IV_SIZE); |
f2a15f1d | 432 | |
c3d21949 | 433 | return gcm_aes_nx_crypt(req, 0, req->assoclen); |
f2a15f1d KY |
434 | } |
435 | ||
436 | static int gcm4106_aes_nx_encrypt(struct aead_request *req) | |
437 | { | |
c3d21949 HX |
438 | struct nx_crypto_ctx *nx_ctx = |
439 | crypto_aead_ctx(crypto_aead_reqtfm(req)); | |
030f4e96 HX |
440 | struct nx_gcm_rctx *rctx = aead_request_ctx(req); |
441 | char *iv = rctx->iv; | |
f2a15f1d KY |
442 | char *nonce = nx_ctx->priv.gcm.nonce; |
443 | ||
444 | memcpy(iv, nonce, NX_GCM4106_NONCE_LEN); | |
445 | memcpy(iv + NX_GCM4106_NONCE_LEN, req->iv, 8); | |
446 | ||
c3d21949 HX |
447 | if (req->assoclen < 8) |
448 | return -EINVAL; | |
449 | ||
450 | return gcm_aes_nx_crypt(req, 1, req->assoclen - 8); | |
f2a15f1d KY |
451 | } |
452 | ||
453 | static int gcm4106_aes_nx_decrypt(struct aead_request *req) | |
454 | { | |
c3d21949 HX |
455 | struct nx_crypto_ctx *nx_ctx = |
456 | crypto_aead_ctx(crypto_aead_reqtfm(req)); | |
030f4e96 HX |
457 | struct nx_gcm_rctx *rctx = aead_request_ctx(req); |
458 | char *iv = rctx->iv; | |
f2a15f1d KY |
459 | char *nonce = nx_ctx->priv.gcm.nonce; |
460 | ||
461 | memcpy(iv, nonce, NX_GCM4106_NONCE_LEN); | |
462 | memcpy(iv + NX_GCM4106_NONCE_LEN, req->iv, 8); | |
463 | ||
c3d21949 HX |
464 | if (req->assoclen < 8) |
465 | return -EINVAL; | |
466 | ||
467 | return gcm_aes_nx_crypt(req, 0, req->assoclen - 8); | |
f2a15f1d KY |
468 | } |
469 | ||
201f28f0 HX |
470 | struct aead_alg nx_gcm_aes_alg = { |
471 | .base = { | |
472 | .cra_name = "gcm(aes)", | |
473 | .cra_driver_name = "gcm-aes-nx", | |
474 | .cra_priority = 300, | |
475 | .cra_blocksize = 1, | |
476 | .cra_ctxsize = sizeof(struct nx_crypto_ctx), | |
477 | .cra_module = THIS_MODULE, | |
478 | }, | |
479 | .init = nx_crypto_ctx_aes_gcm_init, | |
480 | .exit = nx_crypto_ctx_aead_exit, | |
fdd0f3d8 | 481 | .ivsize = GCM_AES_IV_SIZE, |
201f28f0 HX |
482 | .maxauthsize = AES_BLOCK_SIZE, |
483 | .setkey = gcm_aes_nx_set_key, | |
484 | .encrypt = gcm_aes_nx_encrypt, | |
485 | .decrypt = gcm_aes_nx_decrypt, | |
f2a15f1d KY |
486 | }; |
487 | ||
201f28f0 HX |
488 | struct aead_alg nx_gcm4106_aes_alg = { |
489 | .base = { | |
490 | .cra_name = "rfc4106(gcm(aes))", | |
491 | .cra_driver_name = "rfc4106-gcm-aes-nx", | |
492 | .cra_priority = 300, | |
493 | .cra_blocksize = 1, | |
494 | .cra_ctxsize = sizeof(struct nx_crypto_ctx), | |
495 | .cra_module = THIS_MODULE, | |
496 | }, | |
497 | .init = nx_crypto_ctx_aes_gcm_init, | |
498 | .exit = nx_crypto_ctx_aead_exit, | |
fdd0f3d8 | 499 | .ivsize = GCM_RFC4106_IV_SIZE, |
201f28f0 HX |
500 | .maxauthsize = AES_BLOCK_SIZE, |
501 | .setkey = gcm4106_aes_nx_set_key, | |
502 | .setauthsize = gcm4106_aes_nx_setauthsize, | |
503 | .encrypt = gcm4106_aes_nx_encrypt, | |
504 | .decrypt = gcm4106_aes_nx_decrypt, | |
f2a15f1d | 505 | }; |