1 /* $OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $ */ 2 3 /*- 4 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu) 5 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting 6 * 7 * This code was written by Angelos D. Keromytis in Athens, Greece, in 8 * February 2000. Network Security Technologies Inc. (NSTI) kindly 9 * supported the development of this code. 10 * 11 * Copyright (c) 2000 Angelos D. Keromytis 12 * 13 * Permission to use, copy, and modify this software with or without fee 14 * is hereby granted, provided that this entire notice is included in 15 * all source code copies of any software which is or includes a copy or 16 * modification of this software. 17 * 18 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 19 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 20 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 21 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 22 * PURPOSE. 23 * 24 * Copyright (c) 2001 Theo de Raadt 25 * Copyright (c) 2014-2021 The FreeBSD Foundation 26 * All rights reserved. 27 * 28 * Portions of this software were developed by John-Mark Gurney 29 * under sponsorship of the FreeBSD Foundation and 30 * Rubicon Communications, LLC (Netgate). 31 * 32 * Portions of this software were developed by Ararat River 33 * Consulting, LLC under sponsorship of the FreeBSD Foundation. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. The name of the author may not be used to endorse or promote products 45 * derived from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 * 58 * Effort sponsored in part by the Defense Advanced Research Projects 59 * Agency (DARPA) and Air Force Research Laboratory, Air Force 60 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 61 * 62 */ 63 64 #ifndef _CRYPTO_CRYPTO_H_ 65 #define _CRYPTO_CRYPTO_H_ 66 67 #include <sys/ioccom.h> 68 69 #ifdef _KERNEL 70 #include <opencrypto/_cryptodev.h> 71 #include <sys/_task.h> 72 #include <sys/libkern.h> 73 #include <sys/time.h> 74 #endif 75 76 /* Some initial values */ 77 #define CRYPTO_DRIVERS_INITIAL 4 78 79 /* Hash values */ 80 #define NULL_HASH_LEN 16 81 #define SHA1_HASH_LEN 20 82 #define RIPEMD160_HASH_LEN 20 83 #define SHA2_224_HASH_LEN 28 84 #define SHA2_256_HASH_LEN 32 85 #define SHA2_384_HASH_LEN 48 86 #define SHA2_512_HASH_LEN 64 87 #define AES_GMAC_HASH_LEN 16 88 #define POLY1305_HASH_LEN 16 89 #define AES_CBC_MAC_HASH_LEN 16 90 /* Maximum hash algorithm result length */ 91 #define HASH_MAX_LEN SHA2_512_HASH_LEN /* Keep this updated */ 92 93 #define SHA1_BLOCK_LEN 64 94 #define RIPEMD160_BLOCK_LEN 64 95 #define SHA2_224_BLOCK_LEN 64 96 #define SHA2_256_BLOCK_LEN 64 97 #define SHA2_384_BLOCK_LEN 128 98 #define SHA2_512_BLOCK_LEN 128 99 #define POLY1305_BLOCK_LEN 16 100 101 /* HMAC values */ 102 #define NULL_HMAC_BLOCK_LEN 64 103 /* Maximum HMAC block length */ 104 #define HMAC_MAX_BLOCK_LEN SHA2_512_BLOCK_LEN /* Keep this updated */ 105 #define HMAC_IPAD_VAL 0x36 106 #define HMAC_OPAD_VAL 0x5C 107 /* HMAC Key Length */ 108 #define AES_128_GMAC_KEY_LEN 16 109 #define AES_192_GMAC_KEY_LEN 24 110 #define AES_256_GMAC_KEY_LEN 32 111 #define AES_128_CBC_MAC_KEY_LEN 16 112 #define AES_192_CBC_MAC_KEY_LEN 24 113 #define AES_256_CBC_MAC_KEY_LEN 32 114 115 #define POLY1305_KEY_LEN 32 116 117 /* Encryption algorithm block sizes */ 118 #define NULL_BLOCK_LEN 4 /* IPsec to maintain alignment */ 119 #define RIJNDAEL128_BLOCK_LEN 16 120 #define AES_BLOCK_LEN 16 121 #define AES_ICM_BLOCK_LEN 1 122 #define CAMELLIA_BLOCK_LEN 16 123 #define CHACHA20_NATIVE_BLOCK_LEN 64 124 #define EALG_MAX_BLOCK_LEN CHACHA20_NATIVE_BLOCK_LEN /* Keep this updated */ 125 126 /* IV Lengths */ 127 128 #define AES_GCM_IV_LEN 12 129 #define AES_CCM_IV_LEN 12 130 #define AES_XTS_IV_LEN 8 131 #define AES_XTS_ALPHA 0x87 /* GF(2^128) generator polynomial */ 132 #define CHACHA20_POLY1305_IV_LEN 12 133 #define XCHACHA20_POLY1305_IV_LEN 24 134 135 /* Min and Max Encryption Key Sizes */ 136 #define NULL_MIN_KEY 0 137 #define NULL_MAX_KEY 256 /* 2048 bits, max key */ 138 #define RIJNDAEL_MIN_KEY 16 139 #define RIJNDAEL_MAX_KEY 32 140 #define AES_MIN_KEY RIJNDAEL_MIN_KEY 141 #define AES_MAX_KEY RIJNDAEL_MAX_KEY 142 #define AES_XTS_MIN_KEY (2 * AES_MIN_KEY) 143 #define AES_XTS_MAX_KEY (2 * AES_MAX_KEY) 144 #define CAMELLIA_MIN_KEY 16 145 #define CAMELLIA_MAX_KEY 32 146 #define CHACHA20_POLY1305_KEY 32 147 #define XCHACHA20_POLY1305_KEY 32 148 149 /* Maximum hash algorithm result length */ 150 #define AALG_MAX_RESULT_LEN 64 /* Keep this updated */ 151 152 #define CRYPTO_ALGORITHM_MIN 1 153 #define CRYPTO_DES_CBC 1 154 #define CRYPTO_3DES_CBC 2 155 #define CRYPTO_BLF_CBC 3 156 #define CRYPTO_CAST_CBC 4 157 #define CRYPTO_SKIPJACK_CBC 5 158 #define CRYPTO_MD5_HMAC 6 159 #define CRYPTO_SHA1_HMAC 7 160 #define CRYPTO_RIPEMD160_HMAC 8 161 #define CRYPTO_MD5_KPDK 9 162 #define CRYPTO_SHA1_KPDK 10 163 #define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */ 164 #define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */ 165 #define CRYPTO_ARC4 12 166 #define CRYPTO_MD5 13 167 #define CRYPTO_SHA1 14 168 #define CRYPTO_NULL_HMAC 15 169 #define CRYPTO_NULL_CBC 16 170 #define CRYPTO_DEFLATE_COMP 17 /* Deflate compression algorithm */ 171 #define CRYPTO_SHA2_256_HMAC 18 172 #define CRYPTO_SHA2_384_HMAC 19 173 #define CRYPTO_SHA2_512_HMAC 20 174 #define CRYPTO_CAMELLIA_CBC 21 175 #define CRYPTO_AES_XTS 22 176 #define CRYPTO_AES_ICM 23 /* commonly known as CTR mode */ 177 #define CRYPTO_AES_NIST_GMAC 24 /* GMAC only */ 178 #define CRYPTO_AES_NIST_GCM_16 25 /* 16 byte ICV */ 179 #ifdef _KERNEL 180 #define CRYPTO_AES_128_NIST_GMAC 26 /* auth side */ 181 #define CRYPTO_AES_192_NIST_GMAC 27 /* auth side */ 182 #define CRYPTO_AES_256_NIST_GMAC 28 /* auth side */ 183 #endif 184 #define CRYPTO_BLAKE2B 29 /* Blake2b hash */ 185 #define CRYPTO_BLAKE2S 30 /* Blake2s hash */ 186 #define CRYPTO_CHACHA20 31 /* Chacha20 stream cipher */ 187 #define CRYPTO_SHA2_224_HMAC 32 188 #define CRYPTO_RIPEMD160 33 189 #define CRYPTO_SHA2_224 34 190 #define CRYPTO_SHA2_256 35 191 #define CRYPTO_SHA2_384 36 192 #define CRYPTO_SHA2_512 37 193 #define CRYPTO_POLY1305 38 194 #define CRYPTO_AES_CCM_CBC_MAC 39 /* auth side */ 195 #define CRYPTO_AES_CCM_16 40 /* cipher side */ 196 #define CRYPTO_CHACHA20_POLY1305 41 /* combined AEAD cipher per RFC 8439 */ 197 #define CRYPTO_XCHACHA20_POLY1305 42 198 #define CRYPTO_ALGORITHM_MAX 42 /* Keep updated - see below */ 199 200 #define CRYPTO_ALGO_VALID(x) ((x) >= CRYPTO_ALGORITHM_MIN && \ 201 (x) <= CRYPTO_ALGORITHM_MAX) 202 203 /* 204 * Crypto driver/device flags. They can set in the crid 205 * parameter when creating a session or submitting a key 206 * op to affect the device/driver assigned. If neither 207 * of these are specified then the crid is assumed to hold 208 * the driver id of an existing (and suitable) device that 209 * must be used to satisfy the request. 210 */ 211 #define CRYPTO_FLAG_HARDWARE 0x01000000 /* hardware accelerated */ 212 #define CRYPTO_FLAG_SOFTWARE 0x02000000 /* software implementation */ 213 214 /* Does the kernel support vmpage buffers on this platform? */ 215 #ifdef __powerpc__ 216 #define CRYPTO_MAY_HAVE_VMPAGE 1 217 #else 218 #define CRYPTO_MAY_HAVE_VMPAGE ( PMAP_HAS_DMAP ) 219 #endif 220 /* Does the currently running system support vmpage buffers on this platform? */ 221 #define CRYPTO_HAS_VMPAGE ( PMAP_HAS_DMAP ) 222 223 /* NB: deprecated */ 224 struct session_op { 225 uint32_t cipher; /* ie. CRYPTO_AES_CBC */ 226 uint32_t mac; /* ie. CRYPTO_SHA2_256_HMAC */ 227 228 uint32_t keylen; /* cipher key */ 229 const void *key; 230 int mackeylen; /* mac key */ 231 const void *mackey; 232 233 uint32_t ses; /* returns: session # */ 234 }; 235 236 /* 237 * session and crypt _op structs are used by userspace programs to interact 238 * with /dev/crypto. Confusingly, the internal kernel interface is named 239 * "cryptop" (no underscore). 240 */ 241 struct session2_op { 242 uint32_t cipher; /* ie. CRYPTO_AES_CBC */ 243 uint32_t mac; /* ie. CRYPTO_SHA2_256_HMAC */ 244 245 uint32_t keylen; /* cipher key */ 246 const void *key; 247 int mackeylen; /* mac key */ 248 const void *mackey; 249 250 uint32_t ses; /* returns: session # */ 251 int crid; /* driver id + flags (rw) */ 252 int ivlen; /* length of nonce/IV */ 253 int maclen; /* length of MAC/tag */ 254 int pad[2]; /* for future expansion */ 255 }; 256 257 struct crypt_op { 258 uint32_t ses; 259 uint16_t op; /* i.e. COP_ENCRYPT */ 260 #define COP_ENCRYPT 1 261 #define COP_DECRYPT 2 262 uint16_t flags; 263 #define COP_F_CIPHER_FIRST 0x0001 /* Cipher before MAC. */ 264 #define COP_F_BATCH 0x0008 /* Batch op if possible */ 265 u_int len; 266 const void *src; /* become iov[] inside kernel */ 267 void *dst; 268 void *mac; /* must be big enough for chosen MAC */ 269 const void *iv; 270 }; 271 272 /* op and flags the same as crypt_op */ 273 struct crypt_aead { 274 uint32_t ses; 275 uint16_t op; /* i.e. COP_ENCRYPT */ 276 uint16_t flags; 277 u_int len; 278 u_int aadlen; 279 u_int ivlen; 280 const void *src; /* become iov[] inside kernel */ 281 void *dst; 282 const void *aad; /* additional authenticated data */ 283 void *tag; /* must fit for chosen TAG length */ 284 const void *iv; 285 }; 286 287 /* 288 * Parameters for looking up a crypto driver/device by 289 * device name or by id. The latter are returned for 290 * created sessions (crid) and completed key operations. 291 */ 292 struct crypt_find_op { 293 int crid; /* driver id + flags */ 294 char name[32]; /* device/driver name */ 295 }; 296 297 #define CIOCGSESSION _IOWR('c', 101, struct session_op) 298 #define CIOCFSESSION _IOW('c', 102, uint32_t) 299 #define CIOCCRYPT _IOWR('c', 103, struct crypt_op) 300 #define CIOCGSESSION2 _IOWR('c', 106, struct session2_op) 301 #define CIOCFINDDEV _IOWR('c', 108, struct crypt_find_op) 302 #define CIOCCRYPTAEAD _IOWR('c', 109, struct crypt_aead) 303 304 struct cryptostats { 305 uint64_t cs_ops; /* symmetric crypto ops submitted */ 306 uint64_t cs_errs; /* symmetric crypto ops that failed */ 307 uint64_t cs_kops; /* asymetric/key ops submitted */ 308 uint64_t cs_kerrs; /* asymetric/key ops that failed */ 309 uint64_t cs_intrs; /* crypto swi thread activations */ 310 uint64_t cs_rets; /* crypto return thread activations */ 311 uint64_t cs_blocks; /* symmetric op driver block */ 312 uint64_t cs_kblocks; /* symmetric op driver block */ 313 }; 314 315 #ifdef _KERNEL 316 317 /* 318 * Return values for cryptodev_probesession methods. 319 */ 320 #define CRYPTODEV_PROBE_HARDWARE (-100) 321 #define CRYPTODEV_PROBE_ACCEL_SOFTWARE (-200) 322 #define CRYPTODEV_PROBE_SOFTWARE (-500) 323 324 #if 0 325 #define CRYPTDEB(s, ...) do { \ 326 printf("%s:%d: " s "\n", __FILE__, __LINE__, ## __VA_ARGS__); \ 327 } while (0) 328 #else 329 #define CRYPTDEB(...) do { } while (0) 330 #endif 331 332 struct crypto_session_params { 333 int csp_mode; /* Type of operations to perform. */ 334 335 #define CSP_MODE_NONE 0 336 #define CSP_MODE_COMPRESS 1 /* Compression/decompression. */ 337 #define CSP_MODE_CIPHER 2 /* Encrypt/decrypt. */ 338 #define CSP_MODE_DIGEST 3 /* Compute/verify digest. */ 339 #define CSP_MODE_AEAD 4 /* Combined auth/encryption. */ 340 #define CSP_MODE_ETA 5 /* IPsec style encrypt-then-auth */ 341 342 int csp_flags; 343 344 #define CSP_F_SEPARATE_OUTPUT 0x0001 /* Requests can use separate output */ 345 #define CSP_F_SEPARATE_AAD 0x0002 /* Requests can use separate AAD */ 346 #define CSP_F_ESN 0x0004 /* Requests can use seperate ESN field */ 347 348 int csp_ivlen; /* IV length in bytes. */ 349 350 int csp_cipher_alg; 351 int csp_cipher_klen; /* Key length in bytes. */ 352 const void *csp_cipher_key; 353 354 int csp_auth_alg; 355 int csp_auth_klen; /* Key length in bytes. */ 356 const void *csp_auth_key; 357 int csp_auth_mlen; /* Number of digest bytes to use. 358 0 means all. */ 359 }; 360 361 enum crypto_buffer_type { 362 CRYPTO_BUF_NONE = 0, 363 CRYPTO_BUF_CONTIG, 364 CRYPTO_BUF_UIO, 365 CRYPTO_BUF_MBUF, 366 CRYPTO_BUF_VMPAGE, 367 CRYPTO_BUF_SINGLE_MBUF, 368 CRYPTO_BUF_LAST = CRYPTO_BUF_SINGLE_MBUF 369 }; 370 371 /* 372 * Description of a data buffer for a request. Requests can either 373 * have a single buffer that is modified in place or separate input 374 * and output buffers. 375 */ 376 struct crypto_buffer { 377 union { 378 struct { 379 char *cb_buf; 380 int cb_buf_len; 381 }; 382 struct mbuf *cb_mbuf; 383 struct { 384 vm_page_t *cb_vm_page; 385 int cb_vm_page_len; 386 int cb_vm_page_offset; 387 }; 388 struct uio *cb_uio; 389 }; 390 enum crypto_buffer_type cb_type; 391 }; 392 393 /* 394 * A cursor is used to iterate through a crypto request data buffer. 395 */ 396 struct crypto_buffer_cursor { 397 union { 398 char *cc_buf; 399 struct mbuf *cc_mbuf; 400 struct iovec *cc_iov; 401 vm_page_t *cc_vmpage; 402 }; 403 /* Optional bytes of valid data remaining */ 404 int cc_buf_len; 405 /* 406 * Optional offset within the current buffer segment where 407 * valid data begins 408 */ 409 size_t cc_offset; 410 enum crypto_buffer_type cc_type; 411 }; 412 413 /* Structure describing complete operation */ 414 struct cryptop { 415 TAILQ_ENTRY(cryptop) crp_next; 416 417 struct task crp_task; 418 419 crypto_session_t crp_session; /* Session */ 420 int crp_olen; /* Result total length */ 421 422 int crp_etype; /* 423 * Error type (zero means no error). 424 * All error codes except EAGAIN 425 * indicate possible data corruption (as in, 426 * the data have been touched). On all 427 * errors, the crp_session may have changed 428 * (reset to a new one), so the caller 429 * should always check and use the new 430 * value on future requests. 431 */ 432 #define crp_startcopy crp_flags 433 int crp_flags; 434 435 #define CRYPTO_F_CBIMM 0x0010 /* Do callback immediately */ 436 #define CRYPTO_F_DONE 0x0020 /* Operation completed */ 437 #define CRYPTO_F_CBIFSYNC 0x0040 /* Do CBIMM if op is synchronous */ 438 #define CRYPTO_F_ASYNC_ORDERED 0x0100 /* Completions must happen in order */ 439 #define CRYPTO_F_IV_SEPARATE 0x0200 /* Use crp_iv[] as IV. */ 440 441 int crp_op; 442 443 struct crypto_buffer crp_buf; 444 struct crypto_buffer crp_obuf; 445 446 void *crp_aad; /* AAD buffer. */ 447 int crp_aad_start; /* Location of AAD. */ 448 int crp_aad_length; /* 0 => no AAD. */ 449 uint8_t crp_esn[4]; /* high-order ESN */ 450 451 int crp_iv_start; /* Location of IV. IV length is from 452 * the session. 453 */ 454 int crp_payload_start; /* Location of ciphertext. */ 455 int crp_payload_output_start; 456 int crp_payload_length; 457 int crp_digest_start; /* Location of MAC/tag. Length is 458 * from the session. 459 */ 460 461 uint8_t crp_iv[EALG_MAX_BLOCK_LEN]; /* IV if IV_SEPARATE. */ 462 463 const void *crp_cipher_key; /* New cipher key if non-NULL. */ 464 const void *crp_auth_key; /* New auth key if non-NULL. */ 465 #define crp_endcopy crp_opaque 466 467 void *crp_opaque; /* Opaque pointer, passed along */ 468 469 int (*crp_callback)(struct cryptop *); /* Callback function */ 470 471 struct bintime crp_tstamp; /* performance time stamp */ 472 uint32_t crp_seq; /* used for ordered dispatch */ 473 uint32_t crp_retw_id; /* 474 * the return worker to be used, 475 * used for ordered dispatch 476 */ 477 }; 478 479 TAILQ_HEAD(cryptopq, cryptop); 480 481 static __inline void 482 _crypto_use_buf(struct crypto_buffer *cb, void *buf, int len) 483 { 484 cb->cb_buf = buf; 485 cb->cb_buf_len = len; 486 cb->cb_type = CRYPTO_BUF_CONTIG; 487 } 488 489 static __inline void 490 _crypto_use_mbuf(struct crypto_buffer *cb, struct mbuf *m) 491 { 492 cb->cb_mbuf = m; 493 cb->cb_type = CRYPTO_BUF_MBUF; 494 } 495 496 static __inline void 497 _crypto_use_single_mbuf(struct crypto_buffer *cb, struct mbuf *m) 498 { 499 cb->cb_mbuf = m; 500 cb->cb_type = CRYPTO_BUF_SINGLE_MBUF; 501 } 502 503 static __inline void 504 _crypto_use_vmpage(struct crypto_buffer *cb, vm_page_t *pages, int len, 505 int offset) 506 { 507 cb->cb_vm_page = pages; 508 cb->cb_vm_page_len = len; 509 cb->cb_vm_page_offset = offset; 510 cb->cb_type = CRYPTO_BUF_VMPAGE; 511 } 512 513 static __inline void 514 _crypto_use_uio(struct crypto_buffer *cb, struct uio *uio) 515 { 516 cb->cb_uio = uio; 517 cb->cb_type = CRYPTO_BUF_UIO; 518 } 519 520 static __inline void 521 crypto_use_buf(struct cryptop *crp, void *buf, int len) 522 { 523 _crypto_use_buf(&crp->crp_buf, buf, len); 524 } 525 526 static __inline void 527 crypto_use_mbuf(struct cryptop *crp, struct mbuf *m) 528 { 529 _crypto_use_mbuf(&crp->crp_buf, m); 530 } 531 532 static __inline void 533 crypto_use_single_mbuf(struct cryptop *crp, struct mbuf *m) 534 { 535 _crypto_use_single_mbuf(&crp->crp_buf, m); 536 } 537 538 static __inline void 539 crypto_use_vmpage(struct cryptop *crp, vm_page_t *pages, int len, int offset) 540 { 541 _crypto_use_vmpage(&crp->crp_buf, pages, len, offset); 542 } 543 544 static __inline void 545 crypto_use_uio(struct cryptop *crp, struct uio *uio) 546 { 547 _crypto_use_uio(&crp->crp_buf, uio); 548 } 549 550 static __inline void 551 crypto_use_output_buf(struct cryptop *crp, void *buf, int len) 552 { 553 _crypto_use_buf(&crp->crp_obuf, buf, len); 554 } 555 556 static __inline void 557 crypto_use_output_mbuf(struct cryptop *crp, struct mbuf *m) 558 { 559 _crypto_use_mbuf(&crp->crp_obuf, m); 560 } 561 562 static __inline void 563 crypto_use_output_single_mbuf(struct cryptop *crp, struct mbuf *m) 564 { 565 _crypto_use_single_mbuf(&crp->crp_obuf, m); 566 } 567 568 static __inline void 569 crypto_use_output_vmpage(struct cryptop *crp, vm_page_t *pages, int len, 570 int offset) 571 { 572 _crypto_use_vmpage(&crp->crp_obuf, pages, len, offset); 573 } 574 575 static __inline void 576 crypto_use_output_uio(struct cryptop *crp, struct uio *uio) 577 { 578 _crypto_use_uio(&crp->crp_obuf, uio); 579 } 580 581 #define CRYPTO_HAS_OUTPUT_BUFFER(crp) \ 582 ((crp)->crp_obuf.cb_type != CRYPTO_BUF_NONE) 583 584 /* Flags in crp_op. */ 585 #define CRYPTO_OP_DECRYPT 0x0 586 #define CRYPTO_OP_ENCRYPT 0x1 587 #define CRYPTO_OP_IS_ENCRYPT(op) ((op) & CRYPTO_OP_ENCRYPT) 588 #define CRYPTO_OP_COMPUTE_DIGEST 0x0 589 #define CRYPTO_OP_VERIFY_DIGEST 0x2 590 #define CRYPTO_OP_DECOMPRESS CRYPTO_OP_DECRYPT 591 #define CRYPTO_OP_COMPRESS CRYPTO_OP_ENCRYPT 592 #define CRYPTO_OP_IS_COMPRESS(op) ((op) & CRYPTO_OP_COMPRESS) 593 594 /* 595 * Hints passed to process methods. 596 */ 597 #define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */ 598 599 uint32_t crypto_ses2hid(crypto_session_t crypto_session); 600 uint32_t crypto_ses2caps(crypto_session_t crypto_session); 601 void *crypto_get_driver_session(crypto_session_t crypto_session); 602 const struct crypto_session_params *crypto_get_params( 603 crypto_session_t crypto_session); 604 const struct auth_hash *crypto_auth_hash(const struct crypto_session_params *csp); 605 const struct enc_xform *crypto_cipher(const struct crypto_session_params *csp); 606 607 #ifdef MALLOC_DECLARE 608 MALLOC_DECLARE(M_CRYPTO_DATA); 609 #endif 610 611 int crypto_newsession(crypto_session_t *cses, 612 const struct crypto_session_params *params, int crid); 613 void crypto_freesession(crypto_session_t cses); 614 #define CRYPTOCAP_F_HARDWARE CRYPTO_FLAG_HARDWARE 615 #define CRYPTOCAP_F_SOFTWARE CRYPTO_FLAG_SOFTWARE 616 #define CRYPTOCAP_F_SYNC 0x04000000 /* operates synchronously */ 617 #define CRYPTOCAP_F_ACCEL_SOFTWARE 0x08000000 618 #define CRYPTO_SESS_SYNC(sess) \ 619 ((crypto_ses2caps(sess) & CRYPTOCAP_F_SYNC) != 0) 620 int32_t crypto_get_driverid(device_t dev, size_t session_size, int flags); 621 int crypto_find_driver(const char *); 622 device_t crypto_find_device_byhid(int hid); 623 int crypto_getcaps(int hid); 624 int crypto_unregister_all(uint32_t driverid); 625 int crypto_dispatch(struct cryptop *crp); 626 #define CRYPTO_ASYNC_ORDERED 0x1 /* complete in order dispatched */ 627 int crypto_dispatch_async(struct cryptop *crp, int flags); 628 void crypto_dispatch_batch(struct cryptopq *crpq, int flags); 629 #define CRYPTO_SYMQ 0x1 630 int crypto_unblock(uint32_t, int); 631 void crypto_done(struct cryptop *crp); 632 633 struct cryptop *crypto_clonereq(struct cryptop *crp, crypto_session_t cses, 634 int how); 635 void crypto_destroyreq(struct cryptop *crp); 636 void crypto_initreq(struct cryptop *crp, crypto_session_t cses); 637 void crypto_freereq(struct cryptop *crp); 638 struct cryptop *crypto_getreq(crypto_session_t cses, int how); 639 640 extern int crypto_usercrypto; /* userland may do crypto requests */ 641 extern int crypto_devallowsoft; /* only use hardware crypto */ 642 643 #ifdef SYSCTL_DECL 644 SYSCTL_DECL(_kern_crypto); 645 #endif 646 647 /* Helper routines for drivers to initialize auth contexts for HMAC. */ 648 struct auth_hash; 649 650 void hmac_init_ipad(const struct auth_hash *axf, const char *key, int klen, 651 void *auth_ctx); 652 void hmac_init_opad(const struct auth_hash *axf, const char *key, int klen, 653 void *auth_ctx); 654 655 /* 656 * Crypto-related utility routines used mainly by drivers. 657 * 658 * Similar to m_copyback/data, *_copyback copy data from the 'src' 659 * buffer into the crypto request's data buffer while *_copydata copy 660 * data from the crypto request's data buffer into the the 'dst' 661 * buffer. 662 */ 663 void crypto_copyback(struct cryptop *crp, int off, int size, 664 const void *src); 665 void crypto_copydata(struct cryptop *crp, int off, int size, void *dst); 666 int crypto_apply(struct cryptop *crp, int off, int len, 667 int (*f)(void *, const void *, u_int), void *arg); 668 void *crypto_contiguous_subsegment(struct cryptop *crp, size_t skip, 669 size_t len); 670 671 int crypto_apply_buf(struct crypto_buffer *cb, int off, int len, 672 int (*f)(void *, const void *, u_int), void *arg); 673 void *crypto_buffer_contiguous_subsegment(struct crypto_buffer *cb, 674 size_t skip, size_t len); 675 size_t crypto_buffer_len(struct crypto_buffer *cb); 676 void crypto_cursor_init(struct crypto_buffer_cursor *cc, 677 const struct crypto_buffer *cb); 678 void crypto_cursor_advance(struct crypto_buffer_cursor *cc, size_t amount); 679 void *crypto_cursor_segment(struct crypto_buffer_cursor *cc, size_t *len); 680 void crypto_cursor_copyback(struct crypto_buffer_cursor *cc, int size, 681 const void *vsrc); 682 void crypto_cursor_copydata(struct crypto_buffer_cursor *cc, int size, 683 void *vdst); 684 void crypto_cursor_copydata_noadv(struct crypto_buffer_cursor *cc, int size, 685 void *vdst); 686 687 static __inline void 688 crypto_cursor_copy(const struct crypto_buffer_cursor *fromc, 689 struct crypto_buffer_cursor *toc) 690 { 691 memcpy(toc, fromc, sizeof(*toc)); 692 } 693 694 static __inline void 695 crypto_read_iv(struct cryptop *crp, void *iv) 696 { 697 const struct crypto_session_params *csp; 698 699 csp = crypto_get_params(crp->crp_session); 700 if (crp->crp_flags & CRYPTO_F_IV_SEPARATE) 701 memcpy(iv, crp->crp_iv, csp->csp_ivlen); 702 else 703 crypto_copydata(crp, crp->crp_iv_start, csp->csp_ivlen, iv); 704 } 705 706 static __inline size_t 707 ccm_max_payload_length(const struct crypto_session_params *csp) 708 { 709 /* RFC 3160 */ 710 const u_int L = 15 - csp->csp_ivlen; 711 712 switch (L) { 713 case 2: 714 return (0xffff); 715 case 3: 716 return (0xffffff); 717 #ifdef __LP64__ 718 case 4: 719 return (0xffffffff); 720 case 5: 721 return (0xffffffffff); 722 case 6: 723 return (0xffffffffffff); 724 case 7: 725 return (0xffffffffffffff); 726 default: 727 return (0xffffffffffffffff); 728 #else 729 default: 730 return (0xffffffff); 731 #endif 732 } 733 } 734 735 #endif /* _KERNEL */ 736 #endif /* _CRYPTO_CRYPTO_H_ */ 737