1 /* $FreeBSD$ */ 2 /* $OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $ */ 3 4 /* 5 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu) 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 * 26 * Redistribution and use in source and binary forms, with or without 27 * modification, are permitted provided that the following conditions 28 * are met: 29 * 30 * 1. Redistributions of source code must retain the above copyright 31 * notice, this list of conditions and the following disclaimer. 32 * 2. Redistributions in binary form must reproduce the above copyright 33 * notice, this list of conditions and the following disclaimer in the 34 * documentation and/or other materials provided with the distribution. 35 * 3. The name of the author may not be used to endorse or promote products 36 * derived from this software without specific prior written permission. 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 39 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 41 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 42 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 43 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 44 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 45 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 47 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 48 * 49 * Effort sponsored in part by the Defense Advanced Research Projects 50 * Agency (DARPA) and Air Force Research Laboratory, Air Force 51 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 52 * 53 */ 54 55 #ifndef _CRYPTO_CRYPTO_H_ 56 #define _CRYPTO_CRYPTO_H_ 57 58 #include <sys/ioccom.h> 59 60 /* Some initial values */ 61 #define CRYPTO_DRIVERS_INITIAL 4 62 #define CRYPTO_SW_SESSIONS 32 63 64 /* HMAC values */ 65 #define HMAC_BLOCK_LEN 64 66 #define HMAC_IPAD_VAL 0x36 67 #define HMAC_OPAD_VAL 0x5C 68 69 /* Encryption algorithm block sizes */ 70 #define DES_BLOCK_LEN 8 71 #define DES3_BLOCK_LEN 8 72 #define BLOWFISH_BLOCK_LEN 8 73 #define SKIPJACK_BLOCK_LEN 8 74 #define CAST128_BLOCK_LEN 8 75 #define RIJNDAEL128_BLOCK_LEN 16 76 #define EALG_MAX_BLOCK_LEN 16 /* Keep this updated */ 77 78 /* Maximum hash algorithm result length */ 79 #define AALG_MAX_RESULT_LEN 64 /* Keep this updated */ 80 81 #define CRYPTO_ALGORITHM_MIN 1 82 #define CRYPTO_DES_CBC 1 83 #define CRYPTO_3DES_CBC 2 84 #define CRYPTO_BLF_CBC 3 85 #define CRYPTO_CAST_CBC 4 86 #define CRYPTO_SKIPJACK_CBC 5 87 #define CRYPTO_MD5_HMAC 6 88 #define CRYPTO_SHA1_HMAC 7 89 #define CRYPTO_RIPEMD160_HMAC 8 90 #define CRYPTO_MD5_KPDK 9 91 #define CRYPTO_SHA1_KPDK 10 92 #define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */ 93 #define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */ 94 #define CRYPTO_ARC4 12 95 #define CRYPTO_MD5 13 96 #define CRYPTO_SHA1 14 97 #define CRYPTO_SHA2_HMAC 15 98 #define CRYPTO_NULL_HMAC 16 99 #define CRYPTO_NULL_CBC 17 100 #define CRYPTO_DEFLATE_COMP 18 /* Deflate compression algorithm */ 101 #define CRYPTO_ALGORITHM_MAX 18 /* Keep updated - see below */ 102 103 /* Algorithm flags */ 104 #define CRYPTO_ALG_FLAG_SUPPORTED 0x01 /* Algorithm is supported */ 105 #define CRYPTO_ALG_FLAG_RNG_ENABLE 0x02 /* Has HW RNG for DH/DSA */ 106 #define CRYPTO_ALG_FLAG_DSA_SHA 0x04 /* Can do SHA on msg */ 107 108 struct session_op { 109 u_int32_t cipher; /* ie. CRYPTO_DES_CBC */ 110 u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */ 111 112 u_int32_t keylen; /* cipher key */ 113 caddr_t key; 114 int mackeylen; /* mac key */ 115 caddr_t mackey; 116 117 u_int32_t ses; /* returns: session # */ 118 }; 119 120 struct crypt_op { 121 u_int32_t ses; 122 u_int16_t op; /* i.e. COP_ENCRYPT */ 123 #define COP_ENCRYPT 1 124 #define COP_DECRYPT 2 125 u_int16_t flags; /* always 0 */ 126 u_int len; 127 caddr_t src, dst; /* become iov[] inside kernel */ 128 caddr_t mac; /* must be big enough for chosen MAC */ 129 caddr_t iv; 130 }; 131 132 #define CRYPTO_MAX_MAC_LEN 20 133 134 /* bignum parameter, in packed bytes, ... */ 135 struct crparam { 136 caddr_t crp_p; 137 u_int crp_nbits; 138 }; 139 140 #define CRK_MAXPARAM 8 141 142 struct crypt_kop { 143 u_int crk_op; /* ie. CRK_MOD_EXP or other */ 144 u_int crk_status; /* return status */ 145 u_short crk_iparams; /* # of input parameters */ 146 u_short crk_oparams; /* # of output parameters */ 147 u_int crk_pad1; 148 struct crparam crk_param[CRK_MAXPARAM]; 149 }; 150 #define CRK_ALGORITM_MIN 0 151 #define CRK_MOD_EXP 0 152 #define CRK_MOD_EXP_CRT 1 153 #define CRK_DSA_SIGN 2 154 #define CRK_DSA_VERIFY 3 155 #define CRK_DH_COMPUTE_KEY 4 156 #define CRK_ALGORITHM_MAX 4 /* Keep updated - see below */ 157 158 #define CRF_MOD_EXP (1 << CRK_MOD_EXP) 159 #define CRF_MOD_EXP_CRT (1 << CRK_MOD_EXP_CRT) 160 #define CRF_DSA_SIGN (1 << CRK_DSA_SIGN) 161 #define CRF_DSA_VERIFY (1 << CRK_DSA_VERIFY) 162 #define CRF_DH_COMPUTE_KEY (1 << CRK_DH_COMPUTE_KEY) 163 164 /* 165 * done against open of /dev/crypto, to get a cloned descriptor. 166 * Please use F_SETFD against the cloned descriptor. 167 */ 168 #define CRIOGET _IOWR('c', 100, u_int32_t) 169 170 /* the following are done against the cloned descriptor */ 171 #define CIOCGSESSION _IOWR('c', 101, struct session_op) 172 #define CIOCFSESSION _IOW('c', 102, u_int32_t) 173 #define CIOCCRYPT _IOWR('c', 103, struct crypt_op) 174 #define CIOCKEY _IOWR('c', 104, struct crypt_kop) 175 176 #define CIOCASYMFEAT _IOR('c', 105, u_int32_t) 177 178 #ifdef _KERNEL 179 /* Standard initialization structure beginning */ 180 struct cryptoini { 181 int cri_alg; /* Algorithm to use */ 182 int cri_klen; /* Key length, in bits */ 183 int cri_rnd; /* Algorithm rounds, where relevant */ 184 caddr_t cri_key; /* key to use */ 185 u_int8_t cri_iv[EALG_MAX_BLOCK_LEN]; /* IV to use */ 186 struct cryptoini *cri_next; 187 }; 188 189 /* Describe boundaries of a single crypto operation */ 190 struct cryptodesc { 191 int crd_skip; /* How many bytes to ignore from start */ 192 int crd_len; /* How many bytes to process */ 193 int crd_inject; /* Where to inject results, if applicable */ 194 int crd_flags; 195 196 #define CRD_F_ENCRYPT 0x01 /* Set when doing encryption */ 197 #define CRD_F_IV_PRESENT 0x02 /* When encrypting, IV is already in 198 place, so don't copy. */ 199 #define CRD_F_IV_EXPLICIT 0x04 /* IV explicitly provided */ 200 #define CRD_F_DSA_SHA_NEEDED 0x08 /* Compute SHA-1 of buffer for DSA */ 201 #define CRD_F_COMP 0x0f /* Set when doing compression */ 202 203 struct cryptoini CRD_INI; /* Initialization/context data */ 204 #define crd_iv CRD_INI.cri_iv 205 #define crd_key CRD_INI.cri_key 206 #define crd_rnd CRD_INI.cri_rnd 207 #define crd_alg CRD_INI.cri_alg 208 #define crd_klen CRD_INI.cri_klen 209 210 struct cryptodesc *crd_next; 211 }; 212 213 /* Structure describing complete operation */ 214 struct cryptop { 215 TAILQ_ENTRY(cryptop) crp_next; 216 217 u_int64_t crp_sid; /* Session ID */ 218 int crp_ilen; /* Input data total length */ 219 int crp_olen; /* Result total length */ 220 int crp_alloctype; /* Type of buf to allocate if needed */ 221 222 int crp_etype; /* 223 * Error type (zero means no error). 224 * All error codes except EAGAIN 225 * indicate possible data corruption (as in, 226 * the data have been touched). On all 227 * errors, the crp_sid may have changed 228 * (reset to a new one), so the caller 229 * should always check and use the new 230 * value on future requests. 231 */ 232 int crp_flags; 233 234 #define CRYPTO_F_IMBUF 0x0001 /* Input/output are mbuf chains, otherwise contig */ 235 #define CRYPTO_F_IOV 0x0002 /* Input/output are uio */ 236 #define CRYPTO_F_REL 0x0004 /* Must return data in same place */ 237 #define CRYPTO_F_NODELAY 0x0008 /* Dispatch as quickly as possible */ 238 239 caddr_t crp_buf; /* Data to be processed */ 240 caddr_t crp_opaque; /* Opaque pointer, passed along */ 241 struct cryptodesc *crp_desc; /* Linked list of processing descriptors */ 242 243 int (*crp_callback)(struct cryptop *); /* Callback function */ 244 245 caddr_t crp_mac; 246 }; 247 248 #define CRYPTO_BUF_CONTIG 0x0 249 #define CRYPTO_BUF_IOV 0x1 250 #define CRYPTO_BUF_MBUF 0x2 251 252 #define CRYPTO_OP_DECRYPT 0x0 253 #define CRYPTO_OP_ENCRYPT 0x1 254 255 /* 256 * Hints passed to process methods. 257 */ 258 #define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */ 259 260 struct cryptkop { 261 TAILQ_ENTRY(cryptkop) krp_next; 262 263 u_int krp_op; /* ie. CRK_MOD_EXP or other */ 264 u_int krp_status; /* return status */ 265 u_short krp_iparams; /* # of input parameters */ 266 u_short krp_oparams; /* # of output parameters */ 267 u_int32_t krp_hid; 268 struct crparam krp_param[CRK_MAXPARAM]; /* kvm */ 269 int (*krp_callback)(struct cryptkop *); 270 }; 271 272 /* Crypto capabilities structure */ 273 struct cryptocap { 274 u_int32_t cc_sessions; 275 276 /* 277 * Largest possible operator length (in bits) for each type of 278 * encryption algorithm. 279 */ 280 u_int16_t cc_max_op_len[CRYPTO_ALGORITHM_MAX + 1]; 281 282 u_int8_t cc_alg[CRYPTO_ALGORITHM_MAX + 1]; 283 284 u_int8_t cc_kalg[CRK_ALGORITHM_MAX + 1]; 285 286 u_int8_t cc_flags; 287 u_int8_t cc_qblocked; /* symmetric q blocked */ 288 u_int8_t cc_kqblocked; /* asymmetric q blocked */ 289 #define CRYPTOCAP_F_CLEANUP 0x1 290 #define CRYPTOCAP_F_SOFTWARE 0x02 291 292 void *cc_arg; /* callback argument */ 293 int (*cc_newsession)(void*, u_int32_t*, struct cryptoini*); 294 int (*cc_process)(void*, struct cryptop *, int); 295 int (*cc_freesession)(void*, u_int64_t); 296 void *cc_karg; /* callback argument */ 297 int (*cc_kprocess) (void*, struct cryptkop *, int); 298 }; 299 300 MALLOC_DECLARE(M_CRYPTO_DATA); 301 302 extern int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard); 303 extern int crypto_freesession(u_int64_t sid); 304 extern int32_t crypto_get_driverid(u_int32_t flags); 305 extern int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen, 306 u_int32_t flags, 307 int (*newses)(void*, u_int32_t*, struct cryptoini*), 308 int (*freeses)(void*, u_int64_t), 309 int (*process)(void*, struct cryptop *, int), 310 void *arg); 311 extern int crypto_kregister(u_int32_t, int, u_int32_t, 312 int (*)(void*, struct cryptkop *, int), 313 void *arg); 314 extern int crypto_unregister(u_int32_t driverid, int alg); 315 extern int crypto_unregister_all(u_int32_t driverid); 316 extern int crypto_dispatch(struct cryptop *crp); 317 extern int crypto_kdispatch(struct cryptkop *); 318 #define CRYPTO_SYMQ 0x1 319 #define CRYPTO_ASYMQ 0x2 320 extern int crypto_unblock(u_int32_t, int); 321 extern void crypto_done(struct cryptop *crp); 322 extern void crypto_kdone(struct cryptkop *); 323 extern int crypto_getfeat(int *); 324 325 extern void crypto_freereq(struct cryptop *crp); 326 extern struct cryptop *crypto_getreq(int num); 327 328 extern int crypto_usercrypto; /* userland may do crypto requests */ 329 extern int crypto_userasymcrypto; /* userland may do asym crypto reqs */ 330 extern int crypto_devallowsoft; /* only use hardware crypto */ 331 332 /* 333 * Crypto-related utility routines used mainly by drivers. 334 * 335 * XXX these don't really belong here; but for now they're 336 * kept apart from the rest of the system. 337 */ 338 struct mbuf; 339 struct mbuf *m_getptr(struct mbuf *, int, int *); 340 341 struct uio; 342 extern void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp); 343 extern void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp); 344 extern struct iovec *cuio_getptr(struct uio *uio, int loc, int *off); 345 #endif /* _KERNEL */ 346 #endif /* _CRYPTO_CRYPTO_H_ */ 347