Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 2 | /* |
| 3 | * CCM: Counter with CBC-MAC |
| 4 | * |
| 5 | * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com> |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <crypto/internal/aead.h> |
Ard Biesheuvel | 0eb76ba | 2020-12-11 13:27:15 +0100 | [diff] [blame] | 9 | #include <crypto/internal/cipher.h> |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 10 | #include <crypto/internal/hash.h> |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 11 | #include <crypto/internal/skcipher.h> |
| 12 | #include <crypto/scatterwalk.h> |
| 13 | #include <linux/err.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/slab.h> |
| 18 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 19 | struct ccm_instance_ctx { |
| 20 | struct crypto_skcipher_spawn ctr; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 21 | struct crypto_ahash_spawn mac; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 22 | }; |
| 23 | |
| 24 | struct crypto_ccm_ctx { |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 25 | struct crypto_ahash *mac; |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 26 | struct crypto_skcipher *ctr; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 27 | }; |
| 28 | |
| 29 | struct crypto_rfc4309_ctx { |
| 30 | struct crypto_aead *child; |
| 31 | u8 nonce[3]; |
| 32 | }; |
| 33 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 34 | struct crypto_rfc4309_req_ctx { |
| 35 | struct scatterlist src[3]; |
| 36 | struct scatterlist dst[3]; |
| 37 | struct aead_request subreq; |
| 38 | }; |
| 39 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 40 | struct crypto_ccm_req_priv_ctx { |
| 41 | u8 odata[16]; |
Ard Biesheuvel | 3b30460 | 2017-02-27 15:30:56 +0000 | [diff] [blame] | 42 | u8 idata[16]; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 43 | u8 auth_tag[16]; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 44 | u32 flags; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 45 | struct scatterlist src[3]; |
| 46 | struct scatterlist dst[3]; |
Ard Biesheuvel | ebf533a | 2018-08-07 14:18:37 -0700 | [diff] [blame] | 47 | union { |
| 48 | struct ahash_request ahreq; |
| 49 | struct skcipher_request skreq; |
| 50 | }; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 51 | }; |
| 52 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 53 | struct cbcmac_tfm_ctx { |
| 54 | struct crypto_cipher *child; |
| 55 | }; |
| 56 | |
| 57 | struct cbcmac_desc_ctx { |
| 58 | unsigned int len; |
Eric Biggers | 21415bf | 2023-10-18 22:53:32 -0700 | [diff] [blame] | 59 | u8 dg[]; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 60 | }; |
| 61 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 62 | static inline struct crypto_ccm_req_priv_ctx *crypto_ccm_reqctx( |
| 63 | struct aead_request *req) |
| 64 | { |
| 65 | unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req)); |
| 66 | |
| 67 | return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1); |
| 68 | } |
| 69 | |
| 70 | static int set_msg_len(u8 *block, unsigned int msglen, int csize) |
| 71 | { |
| 72 | __be32 data; |
| 73 | |
| 74 | memset(block, 0, csize); |
| 75 | block += csize; |
| 76 | |
| 77 | if (csize >= 4) |
| 78 | csize = 4; |
| 79 | else if (msglen > (1 << (8 * csize))) |
| 80 | return -EOVERFLOW; |
| 81 | |
| 82 | data = cpu_to_be32(msglen); |
| 83 | memcpy(block - csize, (u8 *)&data + 4 - csize, csize); |
| 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | static int crypto_ccm_setkey(struct crypto_aead *aead, const u8 *key, |
| 89 | unsigned int keylen) |
| 90 | { |
| 91 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 92 | struct crypto_skcipher *ctr = ctx->ctr; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 93 | struct crypto_ahash *mac = ctx->mac; |
Eric Biggers | af5034e | 2019-12-30 21:19:38 -0600 | [diff] [blame] | 94 | int err; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 95 | |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 96 | crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK); |
| 97 | crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) & |
| 98 | CRYPTO_TFM_REQ_MASK); |
| 99 | err = crypto_skcipher_setkey(ctr, key, keylen); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 100 | if (err) |
Eric Biggers | af5034e | 2019-12-30 21:19:38 -0600 | [diff] [blame] | 101 | return err; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 102 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 103 | crypto_ahash_clear_flags(mac, CRYPTO_TFM_REQ_MASK); |
| 104 | crypto_ahash_set_flags(mac, crypto_aead_get_flags(aead) & |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 105 | CRYPTO_TFM_REQ_MASK); |
Eric Biggers | af5034e | 2019-12-30 21:19:38 -0600 | [diff] [blame] | 106 | return crypto_ahash_setkey(mac, key, keylen); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | static int crypto_ccm_setauthsize(struct crypto_aead *tfm, |
| 110 | unsigned int authsize) |
| 111 | { |
| 112 | switch (authsize) { |
| 113 | case 4: |
| 114 | case 6: |
| 115 | case 8: |
| 116 | case 10: |
| 117 | case 12: |
| 118 | case 14: |
| 119 | case 16: |
| 120 | break; |
| 121 | default: |
| 122 | return -EINVAL; |
| 123 | } |
| 124 | |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | static int format_input(u8 *info, struct aead_request *req, |
| 129 | unsigned int cryptlen) |
| 130 | { |
| 131 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
| 132 | unsigned int lp = req->iv[0]; |
| 133 | unsigned int l = lp + 1; |
| 134 | unsigned int m; |
| 135 | |
| 136 | m = crypto_aead_authsize(aead); |
| 137 | |
| 138 | memcpy(info, req->iv, 16); |
| 139 | |
| 140 | /* format control info per RFC 3610 and |
| 141 | * NIST Special Publication 800-38C |
| 142 | */ |
| 143 | *info |= (8 * ((m - 2) / 2)); |
| 144 | if (req->assoclen) |
| 145 | *info |= 64; |
| 146 | |
| 147 | return set_msg_len(info + 16 - l, cryptlen, l); |
| 148 | } |
| 149 | |
| 150 | static int format_adata(u8 *adata, unsigned int a) |
| 151 | { |
| 152 | int len = 0; |
| 153 | |
| 154 | /* add control info for associated data |
| 155 | * RFC 3610 and NIST Special Publication 800-38C |
| 156 | */ |
| 157 | if (a < 65280) { |
| 158 | *(__be16 *)adata = cpu_to_be16(a); |
| 159 | len = 2; |
| 160 | } else { |
| 161 | *(__be16 *)adata = cpu_to_be16(0xfffe); |
| 162 | *(__be32 *)&adata[2] = cpu_to_be32(a); |
| 163 | len = 6; |
| 164 | } |
| 165 | |
| 166 | return len; |
| 167 | } |
| 168 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 169 | static int crypto_ccm_auth(struct aead_request *req, struct scatterlist *plain, |
| 170 | unsigned int cryptlen) |
| 171 | { |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 172 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 173 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
| 174 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); |
Ard Biesheuvel | ebf533a | 2018-08-07 14:18:37 -0700 | [diff] [blame] | 175 | struct ahash_request *ahreq = &pctx->ahreq; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 176 | unsigned int assoclen = req->assoclen; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 177 | struct scatterlist sg[3]; |
Ard Biesheuvel | 3b30460 | 2017-02-27 15:30:56 +0000 | [diff] [blame] | 178 | u8 *odata = pctx->odata; |
| 179 | u8 *idata = pctx->idata; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 180 | int ilen, err; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 181 | |
| 182 | /* format control data for input */ |
| 183 | err = format_input(odata, req, cryptlen); |
| 184 | if (err) |
| 185 | goto out; |
| 186 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 187 | sg_init_table(sg, 3); |
| 188 | sg_set_buf(&sg[0], odata, 16); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 189 | |
| 190 | /* format associated data and compute into mac */ |
| 191 | if (assoclen) { |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 192 | ilen = format_adata(idata, assoclen); |
| 193 | sg_set_buf(&sg[1], idata, ilen); |
| 194 | sg_chain(sg, 3, req->src); |
Jarod Wilson | 516280e | 2009-01-22 19:58:15 +1100 | [diff] [blame] | 195 | } else { |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 196 | ilen = 0; |
| 197 | sg_chain(sg, 2, req->src); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 198 | } |
| 199 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 200 | ahash_request_set_tfm(ahreq, ctx->mac); |
| 201 | ahash_request_set_callback(ahreq, pctx->flags, NULL, NULL); |
| 202 | ahash_request_set_crypt(ahreq, sg, NULL, assoclen + ilen + 16); |
| 203 | err = crypto_ahash_init(ahreq); |
| 204 | if (err) |
| 205 | goto out; |
| 206 | err = crypto_ahash_update(ahreq); |
| 207 | if (err) |
| 208 | goto out; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 209 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 210 | /* we need to pad the MAC input to a round multiple of the block size */ |
| 211 | ilen = 16 - (assoclen + ilen) % 16; |
| 212 | if (ilen < 16) { |
| 213 | memset(idata, 0, ilen); |
| 214 | sg_init_table(sg, 2); |
| 215 | sg_set_buf(&sg[0], idata, ilen); |
| 216 | if (plain) |
| 217 | sg_chain(sg, 2, plain); |
| 218 | plain = sg; |
| 219 | cryptlen += ilen; |
| 220 | } |
| 221 | |
Tianjia Zhang | ad98164 | 2022-09-26 17:14:21 +0800 | [diff] [blame] | 222 | ahash_request_set_crypt(ahreq, plain, odata, cryptlen); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 223 | err = crypto_ahash_finup(ahreq); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 224 | out: |
| 225 | return err; |
| 226 | } |
| 227 | |
Herbert Xu | 255e48e | 2023-02-08 13:58:44 +0800 | [diff] [blame] | 228 | static void crypto_ccm_encrypt_done(void *data, int err) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 229 | { |
Herbert Xu | 255e48e | 2023-02-08 13:58:44 +0800 | [diff] [blame] | 230 | struct aead_request *req = data; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 231 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
| 232 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); |
| 233 | u8 *odata = pctx->odata; |
| 234 | |
| 235 | if (!err) |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 236 | scatterwalk_map_and_copy(odata, req->dst, |
| 237 | req->assoclen + req->cryptlen, |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 238 | crypto_aead_authsize(aead), 1); |
| 239 | aead_request_complete(req, err); |
| 240 | } |
| 241 | |
| 242 | static inline int crypto_ccm_check_iv(const u8 *iv) |
| 243 | { |
| 244 | /* 2 <= L <= 8, so 1 <= L' <= 7. */ |
| 245 | if (1 > iv[0] || iv[0] > 7) |
| 246 | return -EINVAL; |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 251 | static int crypto_ccm_init_crypt(struct aead_request *req, u8 *tag) |
| 252 | { |
| 253 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); |
| 254 | struct scatterlist *sg; |
| 255 | u8 *iv = req->iv; |
| 256 | int err; |
| 257 | |
| 258 | err = crypto_ccm_check_iv(iv); |
| 259 | if (err) |
| 260 | return err; |
| 261 | |
| 262 | pctx->flags = aead_request_flags(req); |
| 263 | |
| 264 | /* Note: rfc 3610 and NIST 800-38C require counter of |
| 265 | * zero to encrypt auth tag. |
| 266 | */ |
| 267 | memset(iv + 15 - iv[0], 0, iv[0] + 1); |
| 268 | |
| 269 | sg_init_table(pctx->src, 3); |
| 270 | sg_set_buf(pctx->src, tag, 16); |
| 271 | sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen); |
| 272 | if (sg != pctx->src + 1) |
| 273 | sg_chain(pctx->src, 2, sg); |
| 274 | |
| 275 | if (req->src != req->dst) { |
| 276 | sg_init_table(pctx->dst, 3); |
| 277 | sg_set_buf(pctx->dst, tag, 16); |
| 278 | sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen); |
| 279 | if (sg != pctx->dst + 1) |
| 280 | sg_chain(pctx->dst, 2, sg); |
| 281 | } |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 286 | static int crypto_ccm_encrypt(struct aead_request *req) |
| 287 | { |
| 288 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
| 289 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); |
| 290 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 291 | struct skcipher_request *skreq = &pctx->skreq; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 292 | struct scatterlist *dst; |
| 293 | unsigned int cryptlen = req->cryptlen; |
| 294 | u8 *odata = pctx->odata; |
| 295 | u8 *iv = req->iv; |
| 296 | int err; |
| 297 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 298 | err = crypto_ccm_init_crypt(req, odata); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 299 | if (err) |
| 300 | return err; |
| 301 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 302 | err = crypto_ccm_auth(req, sg_next(pctx->src), cryptlen); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 303 | if (err) |
| 304 | return err; |
| 305 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 306 | dst = pctx->src; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 307 | if (req->src != req->dst) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 308 | dst = pctx->dst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 309 | |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 310 | skcipher_request_set_tfm(skreq, ctx->ctr); |
| 311 | skcipher_request_set_callback(skreq, pctx->flags, |
| 312 | crypto_ccm_encrypt_done, req); |
| 313 | skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv); |
| 314 | err = crypto_skcipher_encrypt(skreq); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 315 | if (err) |
| 316 | return err; |
| 317 | |
| 318 | /* copy authtag to end of dst */ |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 319 | scatterwalk_map_and_copy(odata, sg_next(dst), cryptlen, |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 320 | crypto_aead_authsize(aead), 1); |
| 321 | return err; |
| 322 | } |
| 323 | |
Herbert Xu | 255e48e | 2023-02-08 13:58:44 +0800 | [diff] [blame] | 324 | static void crypto_ccm_decrypt_done(void *data, int err) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 325 | { |
Herbert Xu | 255e48e | 2023-02-08 13:58:44 +0800 | [diff] [blame] | 326 | struct aead_request *req = data; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 327 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); |
| 328 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
| 329 | unsigned int authsize = crypto_aead_authsize(aead); |
| 330 | unsigned int cryptlen = req->cryptlen - authsize; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 331 | struct scatterlist *dst; |
| 332 | |
| 333 | pctx->flags = 0; |
| 334 | |
| 335 | dst = sg_next(req->src == req->dst ? pctx->src : pctx->dst); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 336 | |
| 337 | if (!err) { |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 338 | err = crypto_ccm_auth(req, dst, cryptlen); |
James Yonan | 6bf37e5 | 2013-09-26 02:20:39 -0600 | [diff] [blame] | 339 | if (!err && crypto_memneq(pctx->auth_tag, pctx->odata, authsize)) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 340 | err = -EBADMSG; |
| 341 | } |
| 342 | aead_request_complete(req, err); |
| 343 | } |
| 344 | |
| 345 | static int crypto_ccm_decrypt(struct aead_request *req) |
| 346 | { |
| 347 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
| 348 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); |
| 349 | struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req); |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 350 | struct skcipher_request *skreq = &pctx->skreq; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 351 | struct scatterlist *dst; |
| 352 | unsigned int authsize = crypto_aead_authsize(aead); |
| 353 | unsigned int cryptlen = req->cryptlen; |
| 354 | u8 *authtag = pctx->auth_tag; |
| 355 | u8 *odata = pctx->odata; |
Romain Izard | 441f99c | 2017-10-31 15:42:35 +0100 | [diff] [blame] | 356 | u8 *iv = pctx->idata; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 357 | int err; |
| 358 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 359 | cryptlen -= authsize; |
| 360 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 361 | err = crypto_ccm_init_crypt(req, authtag); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 362 | if (err) |
| 363 | return err; |
| 364 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 365 | scatterwalk_map_and_copy(authtag, sg_next(pctx->src), cryptlen, |
| 366 | authsize, 0); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 367 | |
| 368 | dst = pctx->src; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 369 | if (req->src != req->dst) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 370 | dst = pctx->dst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 371 | |
Romain Izard | 441f99c | 2017-10-31 15:42:35 +0100 | [diff] [blame] | 372 | memcpy(iv, req->iv, 16); |
| 373 | |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 374 | skcipher_request_set_tfm(skreq, ctx->ctr); |
| 375 | skcipher_request_set_callback(skreq, pctx->flags, |
| 376 | crypto_ccm_decrypt_done, req); |
| 377 | skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv); |
| 378 | err = crypto_skcipher_decrypt(skreq); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 379 | if (err) |
| 380 | return err; |
| 381 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 382 | err = crypto_ccm_auth(req, sg_next(dst), cryptlen); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 383 | if (err) |
| 384 | return err; |
| 385 | |
| 386 | /* verify */ |
James Yonan | 6bf37e5 | 2013-09-26 02:20:39 -0600 | [diff] [blame] | 387 | if (crypto_memneq(authtag, odata, authsize)) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 388 | return -EBADMSG; |
| 389 | |
| 390 | return err; |
| 391 | } |
| 392 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 393 | static int crypto_ccm_init_tfm(struct crypto_aead *tfm) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 394 | { |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 395 | struct aead_instance *inst = aead_alg_instance(tfm); |
| 396 | struct ccm_instance_ctx *ictx = aead_instance_ctx(inst); |
| 397 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 398 | struct crypto_ahash *mac; |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 399 | struct crypto_skcipher *ctr; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 400 | unsigned long align; |
| 401 | int err; |
| 402 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 403 | mac = crypto_spawn_ahash(&ictx->mac); |
| 404 | if (IS_ERR(mac)) |
| 405 | return PTR_ERR(mac); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 406 | |
Eric Biggers | 60425a8 | 2016-10-28 09:52:19 -0700 | [diff] [blame] | 407 | ctr = crypto_spawn_skcipher(&ictx->ctr); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 408 | err = PTR_ERR(ctr); |
| 409 | if (IS_ERR(ctr)) |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 410 | goto err_free_mac; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 411 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 412 | ctx->mac = mac; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 413 | ctx->ctr = ctr; |
| 414 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 415 | align = crypto_aead_alignmask(tfm); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 416 | align &= ~(crypto_tfm_ctx_alignment() - 1); |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 417 | crypto_aead_set_reqsize( |
| 418 | tfm, |
Herbert Xu | 2c221ad | 2015-05-11 17:47:56 +0800 | [diff] [blame] | 419 | align + sizeof(struct crypto_ccm_req_priv_ctx) + |
Ard Biesheuvel | ebf533a | 2018-08-07 14:18:37 -0700 | [diff] [blame] | 420 | max(crypto_ahash_reqsize(mac), crypto_skcipher_reqsize(ctr))); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 421 | |
| 422 | return 0; |
| 423 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 424 | err_free_mac: |
| 425 | crypto_free_ahash(mac); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 426 | return err; |
| 427 | } |
| 428 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 429 | static void crypto_ccm_exit_tfm(struct crypto_aead *tfm) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 430 | { |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 431 | struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 432 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 433 | crypto_free_ahash(ctx->mac); |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 434 | crypto_free_skcipher(ctx->ctr); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 435 | } |
| 436 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 437 | static void crypto_ccm_free(struct aead_instance *inst) |
| 438 | { |
| 439 | struct ccm_instance_ctx *ctx = aead_instance_ctx(inst); |
| 440 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 441 | crypto_drop_ahash(&ctx->mac); |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 442 | crypto_drop_skcipher(&ctx->ctr); |
| 443 | kfree(inst); |
| 444 | } |
| 445 | |
| 446 | static int crypto_ccm_create_common(struct crypto_template *tmpl, |
| 447 | struct rtattr **tb, |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 448 | const char *ctr_name, |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 449 | const char *mac_name) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 450 | { |
Herbert Xu | 60fa9a3 | 2023-10-03 11:43:25 +0800 | [diff] [blame] | 451 | struct skcipher_alg_common *ctr; |
Eric Biggers | b9f76dd | 2020-01-02 19:58:45 -0800 | [diff] [blame] | 452 | u32 mask; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 453 | struct aead_instance *inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 454 | struct ccm_instance_ctx *ictx; |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 455 | struct hash_alg_common *mac; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 456 | int err; |
| 457 | |
Eric Biggers | 7bcb2c9 | 2020-07-09 23:20:38 -0700 | [diff] [blame] | 458 | err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask); |
| 459 | if (err) |
| 460 | return err; |
Eric Biggers | b9f76dd | 2020-01-02 19:58:45 -0800 | [diff] [blame] | 461 | |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 462 | inst = kzalloc(sizeof(*inst) + sizeof(*ictx), GFP_KERNEL); |
| 463 | if (!inst) |
| 464 | return -ENOMEM; |
| 465 | ictx = aead_instance_ctx(inst); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 466 | |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 467 | err = crypto_grab_ahash(&ictx->mac, aead_crypto_instance(inst), |
Eric Biggers | 7bcb2c9 | 2020-07-09 23:20:38 -0700 | [diff] [blame] | 468 | mac_name, 0, mask | CRYPTO_ALG_ASYNC); |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 469 | if (err) |
| 470 | goto err_free_inst; |
| 471 | mac = crypto_spawn_ahash_alg(&ictx->mac); |
| 472 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 473 | err = -EINVAL; |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 474 | if (strncmp(mac->base.cra_name, "cbcmac(", 7) != 0 || |
| 475 | mac->digestsize != 16) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 476 | goto err_free_inst; |
| 477 | |
Eric Biggers | b9f76dd | 2020-01-02 19:58:45 -0800 | [diff] [blame] | 478 | err = crypto_grab_skcipher(&ictx->ctr, aead_crypto_instance(inst), |
| 479 | ctr_name, 0, mask); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 480 | if (err) |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 481 | goto err_free_inst; |
Herbert Xu | 60fa9a3 | 2023-10-03 11:43:25 +0800 | [diff] [blame] | 482 | ctr = crypto_spawn_skcipher_alg_common(&ictx->ctr); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 483 | |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 484 | /* The skcipher algorithm must be CTR mode, using 16-byte blocks. */ |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 485 | err = -EINVAL; |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 486 | if (strncmp(ctr->base.cra_name, "ctr(", 4) != 0 || |
Herbert Xu | 60fa9a3 | 2023-10-03 11:43:25 +0800 | [diff] [blame] | 487 | ctr->ivsize != 16 || ctr->base.cra_blocksize != 1) |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 488 | goto err_free_inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 489 | |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 490 | /* ctr and cbcmac must use the same underlying block cipher. */ |
| 491 | if (strcmp(ctr->base.cra_name + 4, mac->base.cra_name + 7) != 0) |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 492 | goto err_free_inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 493 | |
| 494 | err = -ENAMETOOLONG; |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 495 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
| 496 | "ccm(%s", ctr->base.cra_name + 4) >= CRYPTO_MAX_ALG_NAME) |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 497 | goto err_free_inst; |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 498 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 499 | if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 500 | "ccm_base(%s,%s)", ctr->base.cra_driver_name, |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 501 | mac->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 502 | goto err_free_inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 503 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 504 | inst->alg.base.cra_priority = (mac->base.cra_priority + |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 505 | ctr->base.cra_priority) / 2; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 506 | inst->alg.base.cra_blocksize = 1; |
Eric Biggers | 36cfc05 | 2023-10-22 01:10:50 -0700 | [diff] [blame] | 507 | inst->alg.base.cra_alignmask = ctr->base.cra_alignmask; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 508 | inst->alg.ivsize = 16; |
Herbert Xu | 60fa9a3 | 2023-10-03 11:43:25 +0800 | [diff] [blame] | 509 | inst->alg.chunksize = ctr->chunksize; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 510 | inst->alg.maxauthsize = 16; |
| 511 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_ccm_ctx); |
| 512 | inst->alg.init = crypto_ccm_init_tfm; |
| 513 | inst->alg.exit = crypto_ccm_exit_tfm; |
| 514 | inst->alg.setkey = crypto_ccm_setkey; |
| 515 | inst->alg.setauthsize = crypto_ccm_setauthsize; |
| 516 | inst->alg.encrypt = crypto_ccm_encrypt; |
| 517 | inst->alg.decrypt = crypto_ccm_decrypt; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 518 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 519 | inst->free = crypto_ccm_free; |
| 520 | |
| 521 | err = aead_register_instance(tmpl, inst); |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 522 | if (err) { |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 523 | err_free_inst: |
Eric Biggers | 05b3bbb | 2020-01-02 19:58:58 -0800 | [diff] [blame] | 524 | crypto_ccm_free(inst); |
| 525 | } |
| 526 | return err; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 527 | } |
| 528 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 529 | static int crypto_ccm_create(struct crypto_template *tmpl, struct rtattr **tb) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 530 | { |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 531 | const char *cipher_name; |
| 532 | char ctr_name[CRYPTO_MAX_ALG_NAME]; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 533 | char mac_name[CRYPTO_MAX_ALG_NAME]; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 534 | |
| 535 | cipher_name = crypto_attr_alg_name(tb[1]); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 536 | if (IS_ERR(cipher_name)) |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 537 | return PTR_ERR(cipher_name); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 538 | |
| 539 | if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)", |
| 540 | cipher_name) >= CRYPTO_MAX_ALG_NAME) |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 541 | return -ENAMETOOLONG; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 542 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 543 | if (snprintf(mac_name, CRYPTO_MAX_ALG_NAME, "cbcmac(%s)", |
| 544 | cipher_name) >= CRYPTO_MAX_ALG_NAME) |
| 545 | return -ENAMETOOLONG; |
| 546 | |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 547 | return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 548 | } |
| 549 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 550 | static int crypto_ccm_base_create(struct crypto_template *tmpl, |
| 551 | struct rtattr **tb) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 552 | { |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 553 | const char *ctr_name; |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 554 | const char *mac_name; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 555 | |
| 556 | ctr_name = crypto_attr_alg_name(tb[1]); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 557 | if (IS_ERR(ctr_name)) |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 558 | return PTR_ERR(ctr_name); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 559 | |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 560 | mac_name = crypto_attr_alg_name(tb[2]); |
| 561 | if (IS_ERR(mac_name)) |
| 562 | return PTR_ERR(mac_name); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 563 | |
Eric Biggers | 6a1faa4 | 2019-04-18 14:44:27 -0700 | [diff] [blame] | 564 | return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 565 | } |
| 566 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 567 | static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key, |
| 568 | unsigned int keylen) |
| 569 | { |
| 570 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent); |
| 571 | struct crypto_aead *child = ctx->child; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 572 | |
| 573 | if (keylen < 3) |
| 574 | return -EINVAL; |
| 575 | |
| 576 | keylen -= 3; |
| 577 | memcpy(ctx->nonce, key + keylen, 3); |
| 578 | |
| 579 | crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 580 | crypto_aead_set_flags(child, crypto_aead_get_flags(parent) & |
| 581 | CRYPTO_TFM_REQ_MASK); |
Eric Biggers | af5034e | 2019-12-30 21:19:38 -0600 | [diff] [blame] | 582 | return crypto_aead_setkey(child, key, keylen); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | static int crypto_rfc4309_setauthsize(struct crypto_aead *parent, |
| 586 | unsigned int authsize) |
| 587 | { |
| 588 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent); |
| 589 | |
| 590 | switch (authsize) { |
| 591 | case 8: |
| 592 | case 12: |
| 593 | case 16: |
| 594 | break; |
| 595 | default: |
| 596 | return -EINVAL; |
| 597 | } |
| 598 | |
| 599 | return crypto_aead_setauthsize(ctx->child, authsize); |
| 600 | } |
| 601 | |
| 602 | static struct aead_request *crypto_rfc4309_crypt(struct aead_request *req) |
| 603 | { |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 604 | struct crypto_rfc4309_req_ctx *rctx = aead_request_ctx(req); |
| 605 | struct aead_request *subreq = &rctx->subreq; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 606 | struct crypto_aead *aead = crypto_aead_reqtfm(req); |
| 607 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(aead); |
| 608 | struct crypto_aead *child = ctx->child; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 609 | struct scatterlist *sg; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 610 | u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child), |
| 611 | crypto_aead_alignmask(child) + 1); |
| 612 | |
| 613 | /* L' */ |
| 614 | iv[0] = 3; |
| 615 | |
| 616 | memcpy(iv + 1, ctx->nonce, 3); |
| 617 | memcpy(iv + 4, req->iv, 8); |
| 618 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 619 | scatterwalk_map_and_copy(iv + 16, req->src, 0, req->assoclen - 8, 0); |
| 620 | |
| 621 | sg_init_table(rctx->src, 3); |
| 622 | sg_set_buf(rctx->src, iv + 16, req->assoclen - 8); |
| 623 | sg = scatterwalk_ffwd(rctx->src + 1, req->src, req->assoclen); |
| 624 | if (sg != rctx->src + 1) |
| 625 | sg_chain(rctx->src, 2, sg); |
| 626 | |
| 627 | if (req->src != req->dst) { |
| 628 | sg_init_table(rctx->dst, 3); |
| 629 | sg_set_buf(rctx->dst, iv + 16, req->assoclen - 8); |
| 630 | sg = scatterwalk_ffwd(rctx->dst + 1, req->dst, req->assoclen); |
| 631 | if (sg != rctx->dst + 1) |
| 632 | sg_chain(rctx->dst, 2, sg); |
| 633 | } |
| 634 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 635 | aead_request_set_tfm(subreq, child); |
| 636 | aead_request_set_callback(subreq, req->base.flags, req->base.complete, |
| 637 | req->base.data); |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 638 | aead_request_set_crypt(subreq, rctx->src, |
| 639 | req->src == req->dst ? rctx->src : rctx->dst, |
| 640 | req->cryptlen, iv); |
| 641 | aead_request_set_ad(subreq, req->assoclen - 8); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 642 | |
| 643 | return subreq; |
| 644 | } |
| 645 | |
| 646 | static int crypto_rfc4309_encrypt(struct aead_request *req) |
| 647 | { |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 648 | if (req->assoclen != 16 && req->assoclen != 20) |
| 649 | return -EINVAL; |
| 650 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 651 | req = crypto_rfc4309_crypt(req); |
| 652 | |
| 653 | return crypto_aead_encrypt(req); |
| 654 | } |
| 655 | |
| 656 | static int crypto_rfc4309_decrypt(struct aead_request *req) |
| 657 | { |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 658 | if (req->assoclen != 16 && req->assoclen != 20) |
| 659 | return -EINVAL; |
| 660 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 661 | req = crypto_rfc4309_crypt(req); |
| 662 | |
| 663 | return crypto_aead_decrypt(req); |
| 664 | } |
| 665 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 666 | static int crypto_rfc4309_init_tfm(struct crypto_aead *tfm) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 667 | { |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 668 | struct aead_instance *inst = aead_alg_instance(tfm); |
| 669 | struct crypto_aead_spawn *spawn = aead_instance_ctx(inst); |
| 670 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 671 | struct crypto_aead *aead; |
| 672 | unsigned long align; |
| 673 | |
| 674 | aead = crypto_spawn_aead(spawn); |
| 675 | if (IS_ERR(aead)) |
| 676 | return PTR_ERR(aead); |
| 677 | |
| 678 | ctx->child = aead; |
| 679 | |
| 680 | align = crypto_aead_alignmask(aead); |
| 681 | align &= ~(crypto_tfm_ctx_alignment() - 1); |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 682 | crypto_aead_set_reqsize( |
| 683 | tfm, |
| 684 | sizeof(struct crypto_rfc4309_req_ctx) + |
Herbert Xu | 2c221ad | 2015-05-11 17:47:56 +0800 | [diff] [blame] | 685 | ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) + |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 686 | align + 32); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 687 | |
| 688 | return 0; |
| 689 | } |
| 690 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 691 | static void crypto_rfc4309_exit_tfm(struct crypto_aead *tfm) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 692 | { |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 693 | struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 694 | |
| 695 | crypto_free_aead(ctx->child); |
| 696 | } |
| 697 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 698 | static void crypto_rfc4309_free(struct aead_instance *inst) |
| 699 | { |
| 700 | crypto_drop_aead(aead_instance_ctx(inst)); |
| 701 | kfree(inst); |
| 702 | } |
| 703 | |
| 704 | static int crypto_rfc4309_create(struct crypto_template *tmpl, |
| 705 | struct rtattr **tb) |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 706 | { |
Eric Biggers | cd900f0 | 2020-01-02 19:58:46 -0800 | [diff] [blame] | 707 | u32 mask; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 708 | struct aead_instance *inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 709 | struct crypto_aead_spawn *spawn; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 710 | struct aead_alg *alg; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 711 | int err; |
| 712 | |
Eric Biggers | 7bcb2c9 | 2020-07-09 23:20:38 -0700 | [diff] [blame] | 713 | err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask); |
| 714 | if (err) |
| 715 | return err; |
Eric Biggers | cd900f0 | 2020-01-02 19:58:46 -0800 | [diff] [blame] | 716 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 717 | inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); |
| 718 | if (!inst) |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 719 | return -ENOMEM; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 720 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 721 | spawn = aead_instance_ctx(inst); |
Eric Biggers | cd900f0 | 2020-01-02 19:58:46 -0800 | [diff] [blame] | 722 | err = crypto_grab_aead(spawn, aead_crypto_instance(inst), |
Eric Biggers | 64d6679 | 2020-02-25 20:59:14 -0800 | [diff] [blame] | 723 | crypto_attr_alg_name(tb[1]), 0, mask); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 724 | if (err) |
Eric Biggers | 64d6679 | 2020-02-25 20:59:14 -0800 | [diff] [blame] | 725 | goto err_free_inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 726 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 727 | alg = crypto_spawn_aead_alg(spawn); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 728 | |
| 729 | err = -EINVAL; |
| 730 | |
| 731 | /* We only support 16-byte blocks. */ |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 732 | if (crypto_aead_alg_ivsize(alg) != 16) |
Eric Biggers | 64d6679 | 2020-02-25 20:59:14 -0800 | [diff] [blame] | 733 | goto err_free_inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 734 | |
| 735 | /* Not a stream cipher? */ |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 736 | if (alg->base.cra_blocksize != 1) |
Eric Biggers | 64d6679 | 2020-02-25 20:59:14 -0800 | [diff] [blame] | 737 | goto err_free_inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 738 | |
| 739 | err = -ENAMETOOLONG; |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 740 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
| 741 | "rfc4309(%s)", alg->base.cra_name) >= |
| 742 | CRYPTO_MAX_ALG_NAME || |
| 743 | snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
| 744 | "rfc4309(%s)", alg->base.cra_driver_name) >= |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 745 | CRYPTO_MAX_ALG_NAME) |
Eric Biggers | 64d6679 | 2020-02-25 20:59:14 -0800 | [diff] [blame] | 746 | goto err_free_inst; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 747 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 748 | inst->alg.base.cra_priority = alg->base.cra_priority; |
| 749 | inst->alg.base.cra_blocksize = 1; |
| 750 | inst->alg.base.cra_alignmask = alg->base.cra_alignmask; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 751 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 752 | inst->alg.ivsize = 8; |
Herbert Xu | 464b93a | 2016-07-12 13:17:38 +0800 | [diff] [blame] | 753 | inst->alg.chunksize = crypto_aead_alg_chunksize(alg); |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 754 | inst->alg.maxauthsize = 16; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 755 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 756 | inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 757 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 758 | inst->alg.init = crypto_rfc4309_init_tfm; |
| 759 | inst->alg.exit = crypto_rfc4309_exit_tfm; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 760 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 761 | inst->alg.setkey = crypto_rfc4309_setkey; |
| 762 | inst->alg.setauthsize = crypto_rfc4309_setauthsize; |
| 763 | inst->alg.encrypt = crypto_rfc4309_encrypt; |
| 764 | inst->alg.decrypt = crypto_rfc4309_decrypt; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 765 | |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 766 | inst->free = crypto_rfc4309_free; |
| 767 | |
| 768 | err = aead_register_instance(tmpl, inst); |
Eric Biggers | 64d6679 | 2020-02-25 20:59:14 -0800 | [diff] [blame] | 769 | if (err) { |
| 770 | err_free_inst: |
| 771 | crypto_rfc4309_free(inst); |
| 772 | } |
Herbert Xu | 81c4c35 | 2015-07-14 16:53:18 +0800 | [diff] [blame] | 773 | return err; |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 774 | } |
| 775 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 776 | static int crypto_cbcmac_digest_setkey(struct crypto_shash *parent, |
| 777 | const u8 *inkey, unsigned int keylen) |
| 778 | { |
| 779 | struct cbcmac_tfm_ctx *ctx = crypto_shash_ctx(parent); |
| 780 | |
| 781 | return crypto_cipher_setkey(ctx->child, inkey, keylen); |
| 782 | } |
| 783 | |
| 784 | static int crypto_cbcmac_digest_init(struct shash_desc *pdesc) |
| 785 | { |
| 786 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); |
| 787 | int bs = crypto_shash_digestsize(pdesc->tfm); |
| 788 | |
| 789 | ctx->len = 0; |
Eric Biggers | 21415bf | 2023-10-18 22:53:32 -0700 | [diff] [blame] | 790 | memset(ctx->dg, 0, bs); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | static int crypto_cbcmac_digest_update(struct shash_desc *pdesc, const u8 *p, |
| 796 | unsigned int len) |
| 797 | { |
| 798 | struct crypto_shash *parent = pdesc->tfm; |
| 799 | struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent); |
| 800 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); |
| 801 | struct crypto_cipher *tfm = tctx->child; |
| 802 | int bs = crypto_shash_digestsize(parent); |
| 803 | |
| 804 | while (len > 0) { |
| 805 | unsigned int l = min(len, bs - ctx->len); |
| 806 | |
Eric Biggers | 21415bf | 2023-10-18 22:53:32 -0700 | [diff] [blame] | 807 | crypto_xor(&ctx->dg[ctx->len], p, l); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 808 | ctx->len +=l; |
| 809 | len -= l; |
| 810 | p += l; |
| 811 | |
| 812 | if (ctx->len == bs) { |
Eric Biggers | 21415bf | 2023-10-18 22:53:32 -0700 | [diff] [blame] | 813 | crypto_cipher_encrypt_one(tfm, ctx->dg, ctx->dg); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 814 | ctx->len = 0; |
| 815 | } |
| 816 | } |
| 817 | |
| 818 | return 0; |
| 819 | } |
| 820 | |
| 821 | static int crypto_cbcmac_digest_final(struct shash_desc *pdesc, u8 *out) |
| 822 | { |
| 823 | struct crypto_shash *parent = pdesc->tfm; |
| 824 | struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent); |
| 825 | struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc); |
| 826 | struct crypto_cipher *tfm = tctx->child; |
| 827 | int bs = crypto_shash_digestsize(parent); |
| 828 | |
| 829 | if (ctx->len) |
Eric Biggers | 21415bf | 2023-10-18 22:53:32 -0700 | [diff] [blame] | 830 | crypto_cipher_encrypt_one(tfm, ctx->dg, ctx->dg); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 831 | |
Eric Biggers | 21415bf | 2023-10-18 22:53:32 -0700 | [diff] [blame] | 832 | memcpy(out, ctx->dg, bs); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 833 | return 0; |
| 834 | } |
| 835 | |
| 836 | static int cbcmac_init_tfm(struct crypto_tfm *tfm) |
| 837 | { |
| 838 | struct crypto_cipher *cipher; |
| 839 | struct crypto_instance *inst = (void *)tfm->__crt_alg; |
Eric Biggers | d5ed3b6 | 2020-01-02 19:59:05 -0800 | [diff] [blame] | 840 | struct crypto_cipher_spawn *spawn = crypto_instance_ctx(inst); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 841 | struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm); |
| 842 | |
| 843 | cipher = crypto_spawn_cipher(spawn); |
| 844 | if (IS_ERR(cipher)) |
| 845 | return PTR_ERR(cipher); |
| 846 | |
| 847 | ctx->child = cipher; |
| 848 | |
| 849 | return 0; |
| 850 | }; |
| 851 | |
| 852 | static void cbcmac_exit_tfm(struct crypto_tfm *tfm) |
| 853 | { |
| 854 | struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm); |
| 855 | crypto_free_cipher(ctx->child); |
| 856 | } |
| 857 | |
| 858 | static int cbcmac_create(struct crypto_template *tmpl, struct rtattr **tb) |
| 859 | { |
| 860 | struct shash_instance *inst; |
Eric Biggers | 1667297 | 2020-01-02 19:59:01 -0800 | [diff] [blame] | 861 | struct crypto_cipher_spawn *spawn; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 862 | struct crypto_alg *alg; |
Eric Biggers | 7bcb2c9 | 2020-07-09 23:20:38 -0700 | [diff] [blame] | 863 | u32 mask; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 864 | int err; |
| 865 | |
Eric Biggers | 7bcb2c9 | 2020-07-09 23:20:38 -0700 | [diff] [blame] | 866 | err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH, &mask); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 867 | if (err) |
| 868 | return err; |
| 869 | |
Eric Biggers | 1667297 | 2020-01-02 19:59:01 -0800 | [diff] [blame] | 870 | inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); |
| 871 | if (!inst) |
| 872 | return -ENOMEM; |
| 873 | spawn = shash_instance_ctx(inst); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 874 | |
Eric Biggers | 1667297 | 2020-01-02 19:59:01 -0800 | [diff] [blame] | 875 | err = crypto_grab_cipher(spawn, shash_crypto_instance(inst), |
Eric Biggers | 7bcb2c9 | 2020-07-09 23:20:38 -0700 | [diff] [blame] | 876 | crypto_attr_alg_name(tb[1]), 0, mask); |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 877 | if (err) |
Eric Biggers | 1667297 | 2020-01-02 19:59:01 -0800 | [diff] [blame] | 878 | goto err_free_inst; |
| 879 | alg = crypto_spawn_cipher_alg(spawn); |
| 880 | |
| 881 | err = crypto_inst_setname(shash_crypto_instance(inst), tmpl->name, alg); |
| 882 | if (err) |
| 883 | goto err_free_inst; |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 884 | |
| 885 | inst->alg.base.cra_priority = alg->cra_priority; |
| 886 | inst->alg.base.cra_blocksize = 1; |
| 887 | |
| 888 | inst->alg.digestsize = alg->cra_blocksize; |
Eric Biggers | 21415bf | 2023-10-18 22:53:32 -0700 | [diff] [blame] | 889 | inst->alg.descsize = sizeof(struct cbcmac_desc_ctx) + |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 890 | alg->cra_blocksize; |
| 891 | |
| 892 | inst->alg.base.cra_ctxsize = sizeof(struct cbcmac_tfm_ctx); |
| 893 | inst->alg.base.cra_init = cbcmac_init_tfm; |
| 894 | inst->alg.base.cra_exit = cbcmac_exit_tfm; |
| 895 | |
| 896 | inst->alg.init = crypto_cbcmac_digest_init; |
| 897 | inst->alg.update = crypto_cbcmac_digest_update; |
| 898 | inst->alg.final = crypto_cbcmac_digest_final; |
| 899 | inst->alg.setkey = crypto_cbcmac_digest_setkey; |
| 900 | |
Eric Biggers | a39c66c | 2020-01-02 20:04:38 -0800 | [diff] [blame] | 901 | inst->free = shash_free_singlespawn_instance; |
| 902 | |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 903 | err = shash_register_instance(tmpl, inst); |
Eric Biggers | 1667297 | 2020-01-02 19:59:01 -0800 | [diff] [blame] | 904 | if (err) { |
| 905 | err_free_inst: |
Eric Biggers | a39c66c | 2020-01-02 20:04:38 -0800 | [diff] [blame] | 906 | shash_free_singlespawn_instance(inst); |
Eric Biggers | 1667297 | 2020-01-02 19:59:01 -0800 | [diff] [blame] | 907 | } |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 908 | return err; |
| 909 | } |
| 910 | |
Xiongfeng Wang | 0db1903 | 2019-01-18 13:58:12 +0800 | [diff] [blame] | 911 | static struct crypto_template crypto_ccm_tmpls[] = { |
| 912 | { |
| 913 | .name = "cbcmac", |
| 914 | .create = cbcmac_create, |
Xiongfeng Wang | 0db1903 | 2019-01-18 13:58:12 +0800 | [diff] [blame] | 915 | .module = THIS_MODULE, |
| 916 | }, { |
| 917 | .name = "ccm_base", |
| 918 | .create = crypto_ccm_base_create, |
| 919 | .module = THIS_MODULE, |
| 920 | }, { |
| 921 | .name = "ccm", |
| 922 | .create = crypto_ccm_create, |
| 923 | .module = THIS_MODULE, |
| 924 | }, { |
| 925 | .name = "rfc4309", |
| 926 | .create = crypto_rfc4309_create, |
| 927 | .module = THIS_MODULE, |
| 928 | }, |
Ard Biesheuvel | f15f05b | 2017-02-03 14:49:36 +0000 | [diff] [blame] | 929 | }; |
| 930 | |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 931 | static int __init crypto_ccm_module_init(void) |
| 932 | { |
Xiongfeng Wang | 0db1903 | 2019-01-18 13:58:12 +0800 | [diff] [blame] | 933 | return crypto_register_templates(crypto_ccm_tmpls, |
| 934 | ARRAY_SIZE(crypto_ccm_tmpls)); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | static void __exit crypto_ccm_module_exit(void) |
| 938 | { |
Xiongfeng Wang | 0db1903 | 2019-01-18 13:58:12 +0800 | [diff] [blame] | 939 | crypto_unregister_templates(crypto_ccm_tmpls, |
| 940 | ARRAY_SIZE(crypto_ccm_tmpls)); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 941 | } |
| 942 | |
Eric Biggers | c4741b2 | 2019-04-11 21:57:42 -0700 | [diff] [blame] | 943 | subsys_initcall(crypto_ccm_module_init); |
Joy Latten | 4a49b49 | 2007-12-12 20:25:13 +0800 | [diff] [blame] | 944 | module_exit(crypto_ccm_module_exit); |
| 945 | |
| 946 | MODULE_LICENSE("GPL"); |
| 947 | MODULE_DESCRIPTION("Counter with CBC MAC"); |
Kees Cook | 5d26a10 | 2014-11-20 17:05:53 -0800 | [diff] [blame] | 948 | MODULE_ALIAS_CRYPTO("ccm_base"); |
| 949 | MODULE_ALIAS_CRYPTO("rfc4309"); |
Kees Cook | 4943ba1 | 2014-11-24 16:32:38 -0800 | [diff] [blame] | 950 | MODULE_ALIAS_CRYPTO("ccm"); |
Ard Biesheuvel | ae748b9 | 2019-06-17 10:18:48 +0200 | [diff] [blame] | 951 | MODULE_ALIAS_CRYPTO("cbcmac"); |
Ard Biesheuvel | 0eb76ba | 2020-12-11 13:27:15 +0100 | [diff] [blame] | 952 | MODULE_IMPORT_NS(CRYPTO_INTERNAL); |