YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * xfrm algorithm interface |
| 3 | * |
| 4 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the Free |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 8 | * Software Foundation; either version 2 of the License, or (at your option) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * any later version. |
| 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/module.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/pfkeyv2.h> |
| 15 | #include <linux/crypto.h> |
Heiko Carstens | b3b724f | 2007-10-23 09:28:34 +0200 | [diff] [blame] | 16 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <net/xfrm.h> |
| 18 | #if defined(CONFIG_INET_AH) || defined(CONFIG_INET_AH_MODULE) || defined(CONFIG_INET6_AH) || defined(CONFIG_INET6_AH_MODULE) |
| 19 | #include <net/ah.h> |
| 20 | #endif |
| 21 | #if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE) |
| 22 | #include <net/esp.h> |
| 23 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | /* |
| 26 | * Algorithms supported by IPsec. These entries contain properties which |
| 27 | * are used in key negotiation and xfrm processing, and are used to verify |
| 28 | * that instantiated crypto transforms have correct parameters for IPsec |
| 29 | * purposes. |
| 30 | */ |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 31 | static struct xfrm_algo_desc aead_list[] = { |
| 32 | { |
| 33 | .name = "rfc4106(gcm(aes))", |
| 34 | |
| 35 | .uinfo = { |
| 36 | .aead = { |
| 37 | .icv_truncbits = 64, |
| 38 | } |
| 39 | }, |
| 40 | |
| 41 | .desc = { |
| 42 | .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8, |
| 43 | .sadb_alg_ivlen = 8, |
| 44 | .sadb_alg_minbits = 128, |
| 45 | .sadb_alg_maxbits = 256 |
| 46 | } |
| 47 | }, |
| 48 | { |
| 49 | .name = "rfc4106(gcm(aes))", |
| 50 | |
| 51 | .uinfo = { |
| 52 | .aead = { |
| 53 | .icv_truncbits = 96, |
| 54 | } |
| 55 | }, |
| 56 | |
| 57 | .desc = { |
| 58 | .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12, |
| 59 | .sadb_alg_ivlen = 8, |
| 60 | .sadb_alg_minbits = 128, |
| 61 | .sadb_alg_maxbits = 256 |
| 62 | } |
| 63 | }, |
| 64 | { |
| 65 | .name = "rfc4106(gcm(aes))", |
| 66 | |
| 67 | .uinfo = { |
| 68 | .aead = { |
| 69 | .icv_truncbits = 128, |
| 70 | } |
| 71 | }, |
| 72 | |
| 73 | .desc = { |
| 74 | .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16, |
| 75 | .sadb_alg_ivlen = 8, |
| 76 | .sadb_alg_minbits = 128, |
| 77 | .sadb_alg_maxbits = 256 |
| 78 | } |
| 79 | }, |
| 80 | { |
| 81 | .name = "rfc4309(ccm(aes))", |
| 82 | |
| 83 | .uinfo = { |
| 84 | .aead = { |
| 85 | .icv_truncbits = 64, |
| 86 | } |
| 87 | }, |
| 88 | |
| 89 | .desc = { |
| 90 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8, |
| 91 | .sadb_alg_ivlen = 8, |
| 92 | .sadb_alg_minbits = 128, |
| 93 | .sadb_alg_maxbits = 256 |
| 94 | } |
| 95 | }, |
| 96 | { |
| 97 | .name = "rfc4309(ccm(aes))", |
| 98 | |
| 99 | .uinfo = { |
| 100 | .aead = { |
| 101 | .icv_truncbits = 96, |
| 102 | } |
| 103 | }, |
| 104 | |
| 105 | .desc = { |
| 106 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12, |
| 107 | .sadb_alg_ivlen = 8, |
| 108 | .sadb_alg_minbits = 128, |
| 109 | .sadb_alg_maxbits = 256 |
| 110 | } |
| 111 | }, |
| 112 | { |
| 113 | .name = "rfc4309(ccm(aes))", |
| 114 | |
| 115 | .uinfo = { |
| 116 | .aead = { |
| 117 | .icv_truncbits = 128, |
| 118 | } |
| 119 | }, |
| 120 | |
| 121 | .desc = { |
| 122 | .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16, |
| 123 | .sadb_alg_ivlen = 8, |
| 124 | .sadb_alg_minbits = 128, |
| 125 | .sadb_alg_maxbits = 256 |
| 126 | } |
| 127 | }, |
| 128 | }; |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static struct xfrm_algo_desc aalg_list[] = { |
| 131 | { |
Herbert Xu | 01a2202 | 2008-04-27 00:59:59 -0700 | [diff] [blame] | 132 | .name = "digest_null", |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | .uinfo = { |
| 135 | .auth = { |
| 136 | .icv_truncbits = 0, |
| 137 | .icv_fullbits = 0, |
| 138 | } |
| 139 | }, |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | .desc = { |
| 142 | .sadb_alg_id = SADB_X_AALG_NULL, |
| 143 | .sadb_alg_ivlen = 0, |
| 144 | .sadb_alg_minbits = 0, |
| 145 | .sadb_alg_maxbits = 0 |
| 146 | } |
| 147 | }, |
| 148 | { |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 149 | .name = "hmac(md5)", |
| 150 | .compat = "md5", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | .uinfo = { |
| 153 | .auth = { |
| 154 | .icv_truncbits = 96, |
| 155 | .icv_fullbits = 128, |
| 156 | } |
| 157 | }, |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | .desc = { |
| 160 | .sadb_alg_id = SADB_AALG_MD5HMAC, |
| 161 | .sadb_alg_ivlen = 0, |
| 162 | .sadb_alg_minbits = 128, |
| 163 | .sadb_alg_maxbits = 128 |
| 164 | } |
| 165 | }, |
| 166 | { |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 167 | .name = "hmac(sha1)", |
| 168 | .compat = "sha1", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | .uinfo = { |
| 171 | .auth = { |
| 172 | .icv_truncbits = 96, |
| 173 | .icv_fullbits = 160, |
| 174 | } |
| 175 | }, |
| 176 | |
| 177 | .desc = { |
| 178 | .sadb_alg_id = SADB_AALG_SHA1HMAC, |
| 179 | .sadb_alg_ivlen = 0, |
| 180 | .sadb_alg_minbits = 160, |
| 181 | .sadb_alg_maxbits = 160 |
| 182 | } |
| 183 | }, |
| 184 | { |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 185 | .name = "hmac(sha256)", |
| 186 | .compat = "sha256", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | .uinfo = { |
| 189 | .auth = { |
| 190 | .icv_truncbits = 96, |
| 191 | .icv_fullbits = 256, |
| 192 | } |
| 193 | }, |
| 194 | |
| 195 | .desc = { |
| 196 | .sadb_alg_id = SADB_X_AALG_SHA2_256HMAC, |
| 197 | .sadb_alg_ivlen = 0, |
| 198 | .sadb_alg_minbits = 256, |
| 199 | .sadb_alg_maxbits = 256 |
| 200 | } |
| 201 | }, |
| 202 | { |
Adrian-Ken Rueegsegger | a13366c | 2008-06-04 12:04:55 -0700 | [diff] [blame] | 203 | .name = "hmac(rmd160)", |
| 204 | .compat = "rmd160", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
| 206 | .uinfo = { |
| 207 | .auth = { |
| 208 | .icv_truncbits = 96, |
| 209 | .icv_fullbits = 160, |
| 210 | } |
| 211 | }, |
| 212 | |
| 213 | .desc = { |
| 214 | .sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC, |
| 215 | .sadb_alg_ivlen = 0, |
| 216 | .sadb_alg_minbits = 160, |
| 217 | .sadb_alg_maxbits = 160 |
| 218 | } |
| 219 | }, |
Kazunori MIYAZAWA | 7cf4c1a | 2006-10-28 13:21:22 +1000 | [diff] [blame] | 220 | { |
| 221 | .name = "xcbc(aes)", |
| 222 | |
| 223 | .uinfo = { |
| 224 | .auth = { |
| 225 | .icv_truncbits = 96, |
| 226 | .icv_fullbits = 128, |
| 227 | } |
| 228 | }, |
| 229 | |
| 230 | .desc = { |
| 231 | .sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC, |
| 232 | .sadb_alg_ivlen = 0, |
| 233 | .sadb_alg_minbits = 128, |
| 234 | .sadb_alg_maxbits = 128 |
| 235 | } |
| 236 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | }; |
| 238 | |
| 239 | static struct xfrm_algo_desc ealg_list[] = { |
| 240 | { |
Herbert Xu | 6b7326c | 2006-07-30 15:41:01 +1000 | [diff] [blame] | 241 | .name = "ecb(cipher_null)", |
| 242 | .compat = "cipher_null", |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | .uinfo = { |
| 245 | .encr = { |
| 246 | .blockbits = 8, |
| 247 | .defkeybits = 0, |
| 248 | } |
| 249 | }, |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | .desc = { |
| 252 | .sadb_alg_id = SADB_EALG_NULL, |
| 253 | .sadb_alg_ivlen = 0, |
| 254 | .sadb_alg_minbits = 0, |
| 255 | .sadb_alg_maxbits = 0 |
| 256 | } |
| 257 | }, |
| 258 | { |
Herbert Xu | 6b7326c | 2006-07-30 15:41:01 +1000 | [diff] [blame] | 259 | .name = "cbc(des)", |
| 260 | .compat = "des", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | .uinfo = { |
| 263 | .encr = { |
| 264 | .blockbits = 64, |
| 265 | .defkeybits = 64, |
| 266 | } |
| 267 | }, |
| 268 | |
| 269 | .desc = { |
| 270 | .sadb_alg_id = SADB_EALG_DESCBC, |
| 271 | .sadb_alg_ivlen = 8, |
| 272 | .sadb_alg_minbits = 64, |
| 273 | .sadb_alg_maxbits = 64 |
| 274 | } |
| 275 | }, |
| 276 | { |
Herbert Xu | 6b7326c | 2006-07-30 15:41:01 +1000 | [diff] [blame] | 277 | .name = "cbc(des3_ede)", |
| 278 | .compat = "des3_ede", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
| 280 | .uinfo = { |
| 281 | .encr = { |
| 282 | .blockbits = 64, |
| 283 | .defkeybits = 192, |
| 284 | } |
| 285 | }, |
| 286 | |
| 287 | .desc = { |
| 288 | .sadb_alg_id = SADB_EALG_3DESCBC, |
| 289 | .sadb_alg_ivlen = 8, |
| 290 | .sadb_alg_minbits = 192, |
| 291 | .sadb_alg_maxbits = 192 |
| 292 | } |
| 293 | }, |
| 294 | { |
Herbert Xu | 245acb8 | 2009-06-24 03:55:41 -0700 | [diff] [blame] | 295 | .name = "cbc(cast5)", |
| 296 | .compat = "cast5", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
| 298 | .uinfo = { |
| 299 | .encr = { |
| 300 | .blockbits = 64, |
| 301 | .defkeybits = 128, |
| 302 | } |
| 303 | }, |
| 304 | |
| 305 | .desc = { |
| 306 | .sadb_alg_id = SADB_X_EALG_CASTCBC, |
| 307 | .sadb_alg_ivlen = 8, |
| 308 | .sadb_alg_minbits = 40, |
| 309 | .sadb_alg_maxbits = 128 |
| 310 | } |
| 311 | }, |
| 312 | { |
Herbert Xu | 6b7326c | 2006-07-30 15:41:01 +1000 | [diff] [blame] | 313 | .name = "cbc(blowfish)", |
| 314 | .compat = "blowfish", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | .uinfo = { |
| 317 | .encr = { |
| 318 | .blockbits = 64, |
| 319 | .defkeybits = 128, |
| 320 | } |
| 321 | }, |
| 322 | |
| 323 | .desc = { |
| 324 | .sadb_alg_id = SADB_X_EALG_BLOWFISHCBC, |
| 325 | .sadb_alg_ivlen = 8, |
| 326 | .sadb_alg_minbits = 40, |
| 327 | .sadb_alg_maxbits = 448 |
| 328 | } |
| 329 | }, |
| 330 | { |
Herbert Xu | 6b7326c | 2006-07-30 15:41:01 +1000 | [diff] [blame] | 331 | .name = "cbc(aes)", |
| 332 | .compat = "aes", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | .uinfo = { |
| 335 | .encr = { |
| 336 | .blockbits = 128, |
| 337 | .defkeybits = 128, |
| 338 | } |
| 339 | }, |
| 340 | |
| 341 | .desc = { |
| 342 | .sadb_alg_id = SADB_X_EALG_AESCBC, |
| 343 | .sadb_alg_ivlen = 8, |
| 344 | .sadb_alg_minbits = 128, |
| 345 | .sadb_alg_maxbits = 256 |
| 346 | } |
| 347 | }, |
| 348 | { |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 349 | .name = "cbc(serpent)", |
| 350 | .compat = "serpent", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 352 | .uinfo = { |
| 353 | .encr = { |
| 354 | .blockbits = 128, |
| 355 | .defkeybits = 128, |
| 356 | } |
| 357 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 359 | .desc = { |
| 360 | .sadb_alg_id = SADB_X_EALG_SERPENTCBC, |
| 361 | .sadb_alg_ivlen = 8, |
| 362 | .sadb_alg_minbits = 128, |
| 363 | .sadb_alg_maxbits = 256, |
| 364 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | }, |
| 366 | { |
Noriaki TAKAMIYA | 6a0dc8d | 2006-10-22 15:05:57 +1000 | [diff] [blame] | 367 | .name = "cbc(camellia)", |
| 368 | |
| 369 | .uinfo = { |
| 370 | .encr = { |
| 371 | .blockbits = 128, |
| 372 | .defkeybits = 128, |
| 373 | } |
| 374 | }, |
| 375 | |
| 376 | .desc = { |
| 377 | .sadb_alg_id = SADB_X_EALG_CAMELLIACBC, |
| 378 | .sadb_alg_ivlen = 8, |
| 379 | .sadb_alg_minbits = 128, |
| 380 | .sadb_alg_maxbits = 256 |
| 381 | } |
| 382 | }, |
| 383 | { |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 384 | .name = "cbc(twofish)", |
| 385 | .compat = "twofish", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 387 | .uinfo = { |
| 388 | .encr = { |
| 389 | .blockbits = 128, |
| 390 | .defkeybits = 128, |
| 391 | } |
| 392 | }, |
| 393 | |
| 394 | .desc = { |
| 395 | .sadb_alg_id = SADB_X_EALG_TWOFISHCBC, |
| 396 | .sadb_alg_ivlen = 8, |
| 397 | .sadb_alg_minbits = 128, |
| 398 | .sadb_alg_maxbits = 256 |
| 399 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | }, |
Joy Latten | 405137d | 2008-02-07 23:11:56 -0800 | [diff] [blame] | 401 | { |
| 402 | .name = "rfc3686(ctr(aes))", |
| 403 | |
| 404 | .uinfo = { |
| 405 | .encr = { |
| 406 | .blockbits = 128, |
| 407 | .defkeybits = 160, /* 128-bit key + 32-bit nonce */ |
| 408 | } |
| 409 | }, |
| 410 | |
| 411 | .desc = { |
| 412 | .sadb_alg_id = SADB_X_EALG_AESCTR, |
| 413 | .sadb_alg_ivlen = 8, |
| 414 | .sadb_alg_minbits = 128, |
| 415 | .sadb_alg_maxbits = 256 |
| 416 | } |
| 417 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | }; |
| 419 | |
| 420 | static struct xfrm_algo_desc calg_list[] = { |
| 421 | { |
| 422 | .name = "deflate", |
| 423 | .uinfo = { |
| 424 | .comp = { |
| 425 | .threshold = 90, |
| 426 | } |
| 427 | }, |
| 428 | .desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE } |
| 429 | }, |
| 430 | { |
| 431 | .name = "lzs", |
| 432 | .uinfo = { |
| 433 | .comp = { |
| 434 | .threshold = 90, |
| 435 | } |
| 436 | }, |
| 437 | .desc = { .sadb_alg_id = SADB_X_CALG_LZS } |
| 438 | }, |
| 439 | { |
| 440 | .name = "lzjh", |
| 441 | .uinfo = { |
| 442 | .comp = { |
| 443 | .threshold = 50, |
| 444 | } |
| 445 | }, |
| 446 | .desc = { .sadb_alg_id = SADB_X_CALG_LZJH } |
| 447 | }, |
| 448 | }; |
| 449 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 450 | static inline int aead_entries(void) |
| 451 | { |
| 452 | return ARRAY_SIZE(aead_list); |
| 453 | } |
| 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | static inline int aalg_entries(void) |
| 456 | { |
| 457 | return ARRAY_SIZE(aalg_list); |
| 458 | } |
| 459 | |
| 460 | static inline int ealg_entries(void) |
| 461 | { |
| 462 | return ARRAY_SIZE(ealg_list); |
| 463 | } |
| 464 | |
| 465 | static inline int calg_entries(void) |
| 466 | { |
| 467 | return ARRAY_SIZE(calg_list); |
| 468 | } |
| 469 | |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 470 | struct xfrm_algo_list { |
| 471 | struct xfrm_algo_desc *algs; |
| 472 | int entries; |
| 473 | u32 type; |
| 474 | u32 mask; |
| 475 | }; |
| 476 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 477 | static const struct xfrm_algo_list xfrm_aead_list = { |
| 478 | .algs = aead_list, |
| 479 | .entries = ARRAY_SIZE(aead_list), |
| 480 | .type = CRYPTO_ALG_TYPE_AEAD, |
| 481 | .mask = CRYPTO_ALG_TYPE_MASK, |
| 482 | }; |
| 483 | |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 484 | static const struct xfrm_algo_list xfrm_aalg_list = { |
| 485 | .algs = aalg_list, |
| 486 | .entries = ARRAY_SIZE(aalg_list), |
| 487 | .type = CRYPTO_ALG_TYPE_HASH, |
Herbert Xu | 6fbf2cb | 2008-01-28 19:35:49 -0800 | [diff] [blame] | 488 | .mask = CRYPTO_ALG_TYPE_HASH_MASK, |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 489 | }; |
| 490 | |
| 491 | static const struct xfrm_algo_list xfrm_ealg_list = { |
| 492 | .algs = ealg_list, |
| 493 | .entries = ARRAY_SIZE(ealg_list), |
| 494 | .type = CRYPTO_ALG_TYPE_BLKCIPHER, |
Herbert Xu | 6fbf2cb | 2008-01-28 19:35:49 -0800 | [diff] [blame] | 495 | .mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK, |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 496 | }; |
| 497 | |
| 498 | static const struct xfrm_algo_list xfrm_calg_list = { |
| 499 | .algs = calg_list, |
| 500 | .entries = ARRAY_SIZE(calg_list), |
| 501 | .type = CRYPTO_ALG_TYPE_COMPRESS, |
Herbert Xu | 6fbf2cb | 2008-01-28 19:35:49 -0800 | [diff] [blame] | 502 | .mask = CRYPTO_ALG_TYPE_MASK, |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 503 | }; |
| 504 | |
| 505 | static struct xfrm_algo_desc *xfrm_find_algo( |
| 506 | const struct xfrm_algo_list *algo_list, |
| 507 | int match(const struct xfrm_algo_desc *entry, const void *data), |
| 508 | const void *data, int probe) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | { |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 510 | struct xfrm_algo_desc *list = algo_list->algs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | int i, status; |
| 512 | |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 513 | for (i = 0; i < algo_list->entries; i++) { |
| 514 | if (!match(list + i, data)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | continue; |
| 516 | |
| 517 | if (list[i].available) |
| 518 | return &list[i]; |
| 519 | |
| 520 | if (!probe) |
| 521 | break; |
| 522 | |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 523 | status = crypto_has_alg(list[i].name, algo_list->type, |
| 524 | algo_list->mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | if (!status) |
| 526 | break; |
| 527 | |
| 528 | list[i].available = status; |
| 529 | return &list[i]; |
| 530 | } |
| 531 | return NULL; |
| 532 | } |
| 533 | |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 534 | static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry, |
| 535 | const void *data) |
| 536 | { |
Herbert Xu | 26b8e51 | 2007-05-22 16:12:26 -0700 | [diff] [blame] | 537 | return entry->desc.sadb_alg_id == (unsigned long)data; |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id) |
| 541 | { |
| 542 | return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match, |
Herbert Xu | 26b8e51 | 2007-05-22 16:12:26 -0700 | [diff] [blame] | 543 | (void *)(unsigned long)alg_id, 1); |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 544 | } |
| 545 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid); |
| 546 | |
| 547 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id) |
| 548 | { |
| 549 | return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match, |
Herbert Xu | 26b8e51 | 2007-05-22 16:12:26 -0700 | [diff] [blame] | 550 | (void *)(unsigned long)alg_id, 1); |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 551 | } |
| 552 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid); |
| 553 | |
| 554 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id) |
| 555 | { |
| 556 | return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match, |
Herbert Xu | 26b8e51 | 2007-05-22 16:12:26 -0700 | [diff] [blame] | 557 | (void *)(unsigned long)alg_id, 1); |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 558 | } |
| 559 | EXPORT_SYMBOL_GPL(xfrm_calg_get_byid); |
| 560 | |
| 561 | static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry, |
| 562 | const void *data) |
| 563 | { |
| 564 | const char *name = data; |
| 565 | |
| 566 | return name && (!strcmp(name, entry->name) || |
| 567 | (entry->compat && !strcmp(name, entry->compat))); |
| 568 | } |
| 569 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe) |
| 571 | { |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 572 | return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name, |
| 573 | probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname); |
| 576 | |
| 577 | struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe) |
| 578 | { |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 579 | return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name, |
| 580 | probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | } |
| 582 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname); |
| 583 | |
| 584 | struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe) |
| 585 | { |
Herbert Xu | c92b3a2 | 2007-05-19 14:21:18 -0700 | [diff] [blame] | 586 | return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name, |
| 587 | probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
| 589 | EXPORT_SYMBOL_GPL(xfrm_calg_get_byname); |
| 590 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 591 | struct xfrm_aead_name { |
| 592 | const char *name; |
| 593 | int icvbits; |
| 594 | }; |
| 595 | |
| 596 | static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry, |
| 597 | const void *data) |
| 598 | { |
| 599 | const struct xfrm_aead_name *aead = data; |
| 600 | const char *name = aead->name; |
| 601 | |
| 602 | return aead->icvbits == entry->uinfo.aead.icv_truncbits && name && |
| 603 | !strcmp(name, entry->name); |
| 604 | } |
| 605 | |
| 606 | struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, int probe) |
| 607 | { |
| 608 | struct xfrm_aead_name data = { |
| 609 | .name = name, |
| 610 | .icvbits = icv_len, |
| 611 | }; |
| 612 | |
| 613 | return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data, |
| 614 | probe); |
| 615 | } |
| 616 | EXPORT_SYMBOL_GPL(xfrm_aead_get_byname); |
| 617 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx) |
| 619 | { |
| 620 | if (idx >= aalg_entries()) |
| 621 | return NULL; |
| 622 | |
| 623 | return &aalg_list[idx]; |
| 624 | } |
| 625 | EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx); |
| 626 | |
| 627 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx) |
| 628 | { |
| 629 | if (idx >= ealg_entries()) |
| 630 | return NULL; |
| 631 | |
| 632 | return &ealg_list[idx]; |
| 633 | } |
| 634 | EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx); |
| 635 | |
| 636 | /* |
| 637 | * Probe for the availability of crypto algorithms, and set the available |
| 638 | * flag for any algorithms found on the system. This is typically called by |
| 639 | * pfkey during userspace SA add, update or register. |
| 640 | */ |
| 641 | void xfrm_probe_algs(void) |
| 642 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | int i, status; |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | BUG_ON(in_softirq()); |
| 646 | |
| 647 | for (i = 0; i < aalg_entries(); i++) { |
Herbert Xu | e4d5b79 | 2006-08-26 18:12:40 +1000 | [diff] [blame] | 648 | status = crypto_has_hash(aalg_list[i].name, 0, |
| 649 | CRYPTO_ALG_ASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | if (aalg_list[i].available != status) |
| 651 | aalg_list[i].available = status; |
| 652 | } |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | for (i = 0; i < ealg_entries(); i++) { |
Herbert Xu | e4d5b79 | 2006-08-26 18:12:40 +1000 | [diff] [blame] | 655 | status = crypto_has_blkcipher(ealg_list[i].name, 0, |
| 656 | CRYPTO_ALG_ASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | if (ealg_list[i].available != status) |
| 658 | ealg_list[i].available = status; |
| 659 | } |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | for (i = 0; i < calg_entries(); i++) { |
Herbert Xu | e4d5b79 | 2006-08-26 18:12:40 +1000 | [diff] [blame] | 662 | status = crypto_has_comp(calg_list[i].name, 0, |
| 663 | CRYPTO_ALG_ASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | if (calg_list[i].available != status) |
| 665 | calg_list[i].available = status; |
| 666 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | } |
| 668 | EXPORT_SYMBOL_GPL(xfrm_probe_algs); |
| 669 | |
| 670 | int xfrm_count_auth_supported(void) |
| 671 | { |
| 672 | int i, n; |
| 673 | |
| 674 | for (i = 0, n = 0; i < aalg_entries(); i++) |
| 675 | if (aalg_list[i].available) |
| 676 | n++; |
| 677 | return n; |
| 678 | } |
| 679 | EXPORT_SYMBOL_GPL(xfrm_count_auth_supported); |
| 680 | |
| 681 | int xfrm_count_enc_supported(void) |
| 682 | { |
| 683 | int i, n; |
| 684 | |
| 685 | for (i = 0, n = 0; i < ealg_entries(); i++) |
| 686 | if (ealg_list[i].available) |
| 687 | n++; |
| 688 | return n; |
| 689 | } |
| 690 | EXPORT_SYMBOL_GPL(xfrm_count_enc_supported); |
| 691 | |
| 692 | /* Move to common area: it is shared with AH. */ |
| 693 | |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 694 | int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *desc, |
| 695 | int offset, int len, icv_update_fn_t icv_update) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | { |
David S. Miller | 1a028e5 | 2007-04-27 15:21:23 -0700 | [diff] [blame] | 697 | int start = skb_headlen(skb); |
| 698 | int i, copy = start - offset; |
David S. Miller | d4fd3bc | 2009-06-09 00:22:47 -0700 | [diff] [blame] | 699 | struct sk_buff *frag_iter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | struct scatterlist sg; |
David S. Miller | d4fd3bc | 2009-06-09 00:22:47 -0700 | [diff] [blame] | 701 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | |
| 703 | /* Checksum header. */ |
| 704 | if (copy > 0) { |
| 705 | if (copy > len) |
| 706 | copy = len; |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 707 | |
David S. Miller | 0e0940d | 2007-10-26 00:39:27 -0700 | [diff] [blame] | 708 | sg_init_one(&sg, skb->data + offset, copy); |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 709 | |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 710 | err = icv_update(desc, &sg, copy); |
| 711 | if (unlikely(err)) |
| 712 | return err; |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 713 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | if ((len -= copy) == 0) |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 715 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | offset += copy; |
| 717 | } |
| 718 | |
| 719 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
David S. Miller | 1a028e5 | 2007-04-27 15:21:23 -0700 | [diff] [blame] | 720 | int end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 722 | WARN_ON(start > offset + len); |
David S. Miller | 1a028e5 | 2007-04-27 15:21:23 -0700 | [diff] [blame] | 723 | |
| 724 | end = start + skb_shinfo(skb)->frags[i].size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | if ((copy = end - offset) > 0) { |
| 726 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 727 | |
| 728 | if (copy > len) |
| 729 | copy = len; |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 730 | |
David S. Miller | 0e0940d | 2007-10-26 00:39:27 -0700 | [diff] [blame] | 731 | sg_init_table(&sg, 1); |
Jens Axboe | 642f149 | 2007-10-24 11:20:47 +0200 | [diff] [blame] | 732 | sg_set_page(&sg, frag->page, copy, |
David S. Miller | 0e0940d | 2007-10-26 00:39:27 -0700 | [diff] [blame] | 733 | frag->page_offset + offset-start); |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 734 | |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 735 | err = icv_update(desc, &sg, copy); |
| 736 | if (unlikely(err)) |
| 737 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
| 739 | if (!(len -= copy)) |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 740 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | offset += copy; |
| 742 | } |
David S. Miller | 1a028e5 | 2007-04-27 15:21:23 -0700 | [diff] [blame] | 743 | start = end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | } |
| 745 | |
David S. Miller | d4fd3bc | 2009-06-09 00:22:47 -0700 | [diff] [blame] | 746 | skb_walk_frags(skb, frag_iter) { |
| 747 | int end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
David S. Miller | d4fd3bc | 2009-06-09 00:22:47 -0700 | [diff] [blame] | 749 | WARN_ON(start > offset + len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
David S. Miller | d4fd3bc | 2009-06-09 00:22:47 -0700 | [diff] [blame] | 751 | end = start + frag_iter->len; |
| 752 | if ((copy = end - offset) > 0) { |
| 753 | if (copy > len) |
| 754 | copy = len; |
| 755 | err = skb_icv_walk(frag_iter, desc, offset-start, |
| 756 | copy, icv_update); |
| 757 | if (unlikely(err)) |
| 758 | return err; |
| 759 | if ((len -= copy) == 0) |
| 760 | return 0; |
| 761 | offset += copy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | } |
David S. Miller | d4fd3bc | 2009-06-09 00:22:47 -0700 | [diff] [blame] | 763 | start = end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | } |
Kris Katterjohn | 09a6266 | 2006-01-08 22:24:28 -0800 | [diff] [blame] | 765 | BUG_ON(len); |
Herbert Xu | 07d4ee5 | 2006-08-20 14:24:50 +1000 | [diff] [blame] | 766 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | } |
| 768 | EXPORT_SYMBOL_GPL(skb_icv_walk); |
| 769 | |
| 770 | #if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE) |
| 771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | void *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len) |
| 773 | { |
| 774 | if (tail != skb) { |
| 775 | skb->data_len += len; |
| 776 | skb->len += len; |
| 777 | } |
| 778 | return skb_put(tail, len); |
| 779 | } |
| 780 | EXPORT_SYMBOL_GPL(pskb_put); |
| 781 | #endif |