/* $OpenBSD: cryptodev.h,v 1.27 2002/04/24 23:24:32 deraadt Exp $ */ /* * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu) * * This code was written by Angelos D. Keromytis in Athens, Greece, in * February 2000. Network Security Technologies Inc. (NSTI) kindly * supported the development of this code. * * Copyright (c) 2000 Angelos D. Keromytis * * Permission to use, copy, and modify this software with or without fee * is hereby granted, provided that this entire notice is included in * all source code copies of any software which is or includes a copy or * modification of this software. * * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR * PURPOSE. * * Copyright (c) 2001 Theo de Raadt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Effort sponsored in part by the Defense Advanced Research Projects * Agency (DARPA) and Air Force Research Laboratory, Air Force * Materiel Command, USAF, under agreement number F30602-01-2-0537. * */ #ifndef _CRYPTO_CRYPTO_H_ #define _CRYPTO_CRYPTO_H_ #include /* Some initial values */ #define CRYPTO_DRIVERS_INITIAL 4 #define CRYPTO_SW_SESSIONS 32 /* HMAC values */ #define HMAC_BLOCK_LEN 64 #define HMAC_IPAD_VAL 0x36 #define HMAC_OPAD_VAL 0x5C /* Encryption algorithm block sizes */ #define DES_BLOCK_LEN 8 #define DES3_BLOCK_LEN 8 #define BLOWFISH_BLOCK_LEN 8 #define SKIPJACK_BLOCK_LEN 8 #define CAST128_BLOCK_LEN 8 #define RIJNDAEL128_BLOCK_LEN 16 #define EALG_MAX_BLOCK_LEN 16 /* Keep this updated */ /* Maximum hash algorithm result length */ #define AALG_MAX_RESULT_LEN 20 /* Keep this updated */ #define CRYPTO_DES_CBC 1 #define CRYPTO_3DES_CBC 2 #define CRYPTO_BLF_CBC 3 #define CRYPTO_CAST_CBC 4 #define CRYPTO_SKIPJACK_CBC 5 #define CRYPTO_MD5_HMAC 6 #define CRYPTO_SHA1_HMAC 7 #define CRYPTO_RIPEMD160_HMAC 8 #define CRYPTO_MD5_KPDK 9 #define CRYPTO_SHA1_KPDK 10 #define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */ #define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */ #define CRYPTO_ARC4 12 #define CRYPTO_MD5 13 #define CRYPTO_SHA1 14 #define CRYPTO_DEFLATE_COMP 15 /* Deflate compression algorithm */ #define CRYPTO_ALGORITHM_MAX 15 /* Keep updated - see below */ /* Algorithm flags */ #define CRYPTO_ALG_FLAG_SUPPORTED 0x00000001 /* Algorithm is supported */ #define CRYPTO_ALG_FLAG_RNG_ENABLE 0x00000002 /* Has HW RNG for DH/DSA */ #define CRYPTO_ALG_FLAG_DSA_SHA 0x00000004 /* Can do SHA on msg */ /* Standard initialization structure beginning */ struct cryptoini { int cri_alg; /* Algorithm to use */ int cri_klen; /* Key length, in bits */ int cri_rnd; /* Algorithm rounds, where relevant */ caddr_t cri_key; /* key to use */ u_int8_t cri_iv[EALG_MAX_BLOCK_LEN]; /* IV to use */ struct cryptoini *cri_next; }; /* Describe boundaries of a single crypto operation */ struct cryptodesc { int crd_skip; /* How many bytes to ignore from start */ int crd_len; /* How many bytes to process */ int crd_inject; /* Where to inject results, if applicable */ int crd_flags; #define CRD_F_ENCRYPT 0x01 /* Set when doing encryption */ #define CRD_F_IV_PRESENT 0x02 /* When encrypting, IV is already in place, so don't copy. */ #define CRD_F_IV_EXPLICIT 0x04 /* IV explicitly provided */ #define CRD_F_DSA_SHA_NEEDED 0x08 /* Compute SHA-1 of buffer for DSA */ #define CRD_F_COMP 0x0f /* Set when doing compression */ struct cryptoini CRD_INI; /* Initialization/context data */ #define crd_iv CRD_INI.cri_iv #define crd_key CRD_INI.cri_key #define crd_rnd CRD_INI.cri_rnd #define crd_alg CRD_INI.cri_alg #define crd_klen CRD_INI.cri_klen struct cryptodesc *crd_next; }; /* Structure describing complete operation */ struct cryptop { u_int64_t crp_sid; /* Session ID */ int crp_ilen; /* Input data total length */ int crp_olen; /* Result total length */ int crp_alloctype; /* Type of buf to allocate if needed */ int crp_etype; /* * Error type (zero means no error). * All error codes except EAGAIN * indicate possible data corruption (as in, * the data have been touched). On all * errors, the crp_sid may have changed * (reset to a new one), so the caller * should always check and use the new * value on future requests. */ int crp_flags; #define CRYPTO_F_IMBUF 0x0001 /* Input/output are mbuf chains, otherwise contig */ #define CRYPTO_F_IOV 0x0002 /* Input/output are uio */ #define CRYPTO_F_REL 0x0004 /* Must return data in same place */ caddr_t crp_buf; /* Data to be processed */ caddr_t crp_opaque; /* Opaque pointer, passed along */ struct cryptodesc *crp_desc; /* Linked list of processing descriptors */ int (*crp_callback)(struct cryptop *); /* Callback function */ struct cryptop *crp_next; caddr_t crp_mac; }; #define CRYPTO_BUF_IOV 0x1 #define CRYPTO_BUF_MBUF 0x2 #define CRYPTO_OP_DECRYPT 0x0 #define CRYPTO_OP_ENCRYPT 0x1 /* bignum parameter, in packed bytes, ... */ struct crparam { caddr_t crp_p; u_int crp_nbits; }; #define CRK_MAXPARAM 8 struct crypt_kop { u_int crk_op; /* ie. CRK_MOD_EXP or other */ u_int crk_status; /* return status */ u_short crk_iparams; /* # of input parameters */ u_short crk_oparams; /* # of output parameters */ u_int crk_pad1; struct crparam crk_param[CRK_MAXPARAM]; }; #define CRK_MOD_EXP 0 #define CRK_MOD_EXP_CRT 1 #define CRK_DSA_SIGN 2 #define CRK_DSA_VERIFY 3 #define CRK_DH_COMPUTE_KEY 4 #define CRK_ALGORITHM_MAX 4 /* Keep updated - see below */ struct cryptkop { u_int krp_op; /* ie. CRK_MOD_EXP or other */ u_int krp_status; /* return status */ u_short krp_iparams; /* # of input parameters */ u_short krp_oparams; /* # of output parameters */ u_int32_t krp_hid; struct crparam krp_param[CRK_MAXPARAM]; /* kvm */ int (*krp_callback)(struct cryptkop *); struct cryptkop *krp_next; }; /* Crypto capabilities structure */ struct cryptocap { u_int32_t cc_sessions; /* * Largest possible operator length (in bits) for each type of * encryption algorithm. */ u_int16_t cc_max_op_len[CRYPTO_ALGORITHM_MAX + 1]; u_int8_t cc_alg[CRYPTO_ALGORITHM_MAX + 1]; u_int8_t cc_kalg[CRK_ALGORITHM_MAX + 1]; u_int8_t cc_flags; #define CRYPTOCAP_F_CLEANUP 0x1 #define CRYPTOCAP_F_SOFTWARE 0x02 int (*cc_newsession) (u_int32_t *, struct cryptoini *); int (*cc_process) (struct cryptop *); int (*cc_freesession) (u_int64_t); int (*cc_kprocess) (struct cryptkop *); }; /* * ioctl parameter to request creation of a session. */ struct session_op { u_int32_t cipher; /* ie. CRYPTO_DES_CBC */ u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */ u_int32_t keylen; /* cipher key */ caddr_t key; int mackeylen; /* mac key */ caddr_t mackey; u_int32_t ses; /* returns: session # */ }; /* * ioctl parameter to request a crypt/decrypt operation against a session. */ struct crypt_op { u_int32_t ses; u_int16_t op; /* ie. COP_ENCRYPT */ #define COP_ENCRYPT 1 #define COP_DECRYPT 2 u_int16_t flags; /* always 0 */ u_int len; caddr_t src, dst; /* become iov[] inside kernel */ caddr_t mac; /* must be big enough for chosen MAC */ caddr_t iv; }; #define CRYPTO_MAX_MAC_LEN 20 /* * done against open of /dev/crypto, to get a cloned descriptor. * Please use F_SETFD against the cloned descriptor. */ #define CRIOGET _IOWR('c', 100, u_int32_t) /* the following are done against the cloned descriptor */ #define CIOCGSESSION _IOWR('c', 101, struct session_op) #define CIOCFSESSION _IOW('c', 102, u_int32_t) #define CIOCCRYPT _IOWR('c', 103, struct crypt_op) #define CIOCKEY _IOWR('c', 104, struct crypt_kop) #define CIOCSYMFEAT _IOR('c', 105, u_int32_t) #define CRSFEAT_RSA 0x00000001 /* supports all basic RSA ops */ #define CRSFEAT_DSA 0x00000002 /* supports all basic DSA ops */ #define CRSFEAT_DH 0x00000004 /* supports all basic DH ops */ #ifdef _KERNEL int crypto_newsession(u_int64_t *, struct cryptoini *, int); int crypto_freesession(u_int64_t); int crypto_dispatch(struct cryptop *); int crypto_kdispatch(struct cryptkop *); int crypto_register(u_int32_t, int, u_int16_t, u_int32_t, int (*)(u_int32_t *, struct cryptoini *), int (*)(u_int64_t), int (*)(struct cryptop *)); int crypto_kregister(u_int32_t, int, u_int32_t, int (*)(struct cryptkop *)); int crypto_unregister(u_int32_t, int); int32_t crypto_get_driverid(u_int8_t); void crypto_thread(void); int crypto_invoke(struct cryptop *); int crypto_kinvoke(struct cryptkop *); void crypto_done(struct cryptop *); void crypto_kdone(struct cryptkop *); int crypto_getfeat(int *); void cuio_copydata(struct uio *, int, int, caddr_t); void cuio_copyback(struct uio *, int, int, caddr_t); int cuio_getptr(struct uio *, int, int *); int cuio_apply(struct uio *, int, int, int (*f)(caddr_t, caddr_t, unsigned int), caddr_t); struct cryptop *crypto_getreq(int); void crypto_freereq(struct cryptop *); #endif /* _KERNEL */ #endif /* _CRYPTO_CRYPTO_H_ */