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freebsd-nq/sys/opencrypto/cryptodev.h
John Baldwin ae18720d27 crypto: Support multiple nonce lengths for AES-CCM. 
Permit nonces of lengths 7 through 13 in the OCF framework and the
cryptosoft driver.  A helper function (ccm_max_payload_length) can be
used in OCF drivers to reject CCM requests which are too large for the
specified nonce length.

Reviewed by:	sef
Sponsored by:	Chelsio Communications, The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D32111
2021-10-06 14:08:47 -07:00

720 lines
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/* $FreeBSD$ */
/* $OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $ */
/*-
* The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
* Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
*
* 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
* Copyright (c) 2014-2021 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by John-Mark Gurney
* under sponsorship of the FreeBSD Foundation and
* Rubicon Communications, LLC (Netgate).
*
* Portions of this software were developed by Ararat River
* Consulting, LLC under sponsorship of the FreeBSD Foundation.
*
* 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 <sys/ioccom.h>
#ifdef _KERNEL
#include <opencrypto/_cryptodev.h>
#include <sys/_task.h>
#endif
/* Some initial values */
#define CRYPTO_DRIVERS_INITIAL 4
/* Hash values */
#define NULL_HASH_LEN 16
#define SHA1_HASH_LEN 20
#define RIPEMD160_HASH_LEN 20
#define SHA2_224_HASH_LEN 28
#define SHA2_256_HASH_LEN 32
#define SHA2_384_HASH_LEN 48
#define SHA2_512_HASH_LEN 64
#define AES_GMAC_HASH_LEN 16
#define POLY1305_HASH_LEN 16
#define AES_CBC_MAC_HASH_LEN 16
/* Maximum hash algorithm result length */
#define HASH_MAX_LEN SHA2_512_HASH_LEN /* Keep this updated */
#define SHA1_BLOCK_LEN 64
#define RIPEMD160_BLOCK_LEN 64
#define SHA2_224_BLOCK_LEN 64
#define SHA2_256_BLOCK_LEN 64
#define SHA2_384_BLOCK_LEN 128
#define SHA2_512_BLOCK_LEN 128
/* HMAC values */
#define NULL_HMAC_BLOCK_LEN 64
/* Maximum HMAC block length */
#define HMAC_MAX_BLOCK_LEN SHA2_512_BLOCK_LEN /* Keep this updated */
#define HMAC_IPAD_VAL 0x36
#define HMAC_OPAD_VAL 0x5C
/* HMAC Key Length */
#define AES_128_GMAC_KEY_LEN 16
#define AES_192_GMAC_KEY_LEN 24
#define AES_256_GMAC_KEY_LEN 32
#define AES_128_CBC_MAC_KEY_LEN 16
#define AES_192_CBC_MAC_KEY_LEN 24
#define AES_256_CBC_MAC_KEY_LEN 32
#define POLY1305_KEY_LEN 32
/* Encryption algorithm block sizes */
#define NULL_BLOCK_LEN 4 /* IPsec to maintain alignment */
#define RIJNDAEL128_BLOCK_LEN 16
#define AES_BLOCK_LEN 16
#define AES_ICM_BLOCK_LEN 1
#define CAMELLIA_BLOCK_LEN 16
#define CHACHA20_NATIVE_BLOCK_LEN 64
#define EALG_MAX_BLOCK_LEN CHACHA20_NATIVE_BLOCK_LEN /* Keep this updated */
/* IV Lengths */
#define AES_GCM_IV_LEN 12
#define AES_CCM_IV_LEN 12
#define AES_XTS_IV_LEN 8
#define AES_XTS_ALPHA 0x87 /* GF(2^128) generator polynomial */
#define CHACHA20_POLY1305_IV_LEN 12
/* Min and Max Encryption Key Sizes */
#define NULL_MIN_KEY 0
#define NULL_MAX_KEY 256 /* 2048 bits, max key */
#define RIJNDAEL_MIN_KEY 16
#define RIJNDAEL_MAX_KEY 32
#define AES_MIN_KEY RIJNDAEL_MIN_KEY
#define AES_MAX_KEY RIJNDAEL_MAX_KEY
#define AES_XTS_MIN_KEY (2 * AES_MIN_KEY)
#define AES_XTS_MAX_KEY (2 * AES_MAX_KEY)
#define CAMELLIA_MIN_KEY 16
#define CAMELLIA_MAX_KEY 32
#define CHACHA20_POLY1305_KEY 32
/* Maximum hash algorithm result length */
#define AALG_MAX_RESULT_LEN 64 /* Keep this updated */
#define CRYPTO_ALGORITHM_MIN 1
#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_NULL_HMAC 15
#define CRYPTO_NULL_CBC 16
#define CRYPTO_DEFLATE_COMP 17 /* Deflate compression algorithm */
#define CRYPTO_SHA2_256_HMAC 18
#define CRYPTO_SHA2_384_HMAC 19
#define CRYPTO_SHA2_512_HMAC 20
#define CRYPTO_CAMELLIA_CBC 21
#define CRYPTO_AES_XTS 22
#define CRYPTO_AES_ICM 23 /* commonly known as CTR mode */
#define CRYPTO_AES_NIST_GMAC 24 /* GMAC only */
#define CRYPTO_AES_NIST_GCM_16 25 /* 16 byte ICV */
#ifdef _KERNEL
#define CRYPTO_AES_128_NIST_GMAC 26 /* auth side */
#define CRYPTO_AES_192_NIST_GMAC 27 /* auth side */
#define CRYPTO_AES_256_NIST_GMAC 28 /* auth side */
#endif
#define CRYPTO_BLAKE2B 29 /* Blake2b hash */
#define CRYPTO_BLAKE2S 30 /* Blake2s hash */
#define CRYPTO_CHACHA20 31 /* Chacha20 stream cipher */
#define CRYPTO_SHA2_224_HMAC 32
#define CRYPTO_RIPEMD160 33
#define CRYPTO_SHA2_224 34
#define CRYPTO_SHA2_256 35
#define CRYPTO_SHA2_384 36
#define CRYPTO_SHA2_512 37
#define CRYPTO_POLY1305 38
#define CRYPTO_AES_CCM_CBC_MAC 39 /* auth side */
#define CRYPTO_AES_CCM_16 40 /* cipher side */
#define CRYPTO_CHACHA20_POLY1305 41 /* combined AEAD cipher per RFC 8439 */
#define CRYPTO_ALGORITHM_MAX 41 /* Keep updated - see below */
#define CRYPTO_ALGO_VALID(x) ((x) >= CRYPTO_ALGORITHM_MIN && \
(x) <= CRYPTO_ALGORITHM_MAX)
/*
* Crypto driver/device flags. They can set in the crid
* parameter when creating a session or submitting a key
* op to affect the device/driver assigned. If neither
* of these are specified then the crid is assumed to hold
* the driver id of an existing (and suitable) device that
* must be used to satisfy the request.
*/
#define CRYPTO_FLAG_HARDWARE 0x01000000 /* hardware accelerated */
#define CRYPTO_FLAG_SOFTWARE 0x02000000 /* software implementation */
/* Does the kernel support vmpage buffers on this platform? */
#ifdef __powerpc__
#define CRYPTO_MAY_HAVE_VMPAGE 1
#else
#define CRYPTO_MAY_HAVE_VMPAGE ( PMAP_HAS_DMAP )
#endif
/* Does the currently running system support vmpage buffers on this platform? */
#define CRYPTO_HAS_VMPAGE ( PMAP_HAS_DMAP )
/* NB: deprecated */
struct session_op {
uint32_t cipher; /* ie. CRYPTO_AES_CBC */
uint32_t mac; /* ie. CRYPTO_SHA2_256_HMAC */
uint32_t keylen; /* cipher key */
const void *key;
int mackeylen; /* mac key */
const void *mackey;
uint32_t ses; /* returns: session # */
};
/*
* session and crypt _op structs are used by userspace programs to interact
* with /dev/crypto. Confusingly, the internal kernel interface is named
* "cryptop" (no underscore).
*/
struct session2_op {
uint32_t cipher; /* ie. CRYPTO_AES_CBC */
uint32_t mac; /* ie. CRYPTO_SHA2_256_HMAC */
uint32_t keylen; /* cipher key */
const void *key;
int mackeylen; /* mac key */
const void *mackey;
uint32_t ses; /* returns: session # */
int crid; /* driver id + flags (rw) */
int ivlen; /* length of nonce/IV */
int maclen; /* length of MAC/tag */
int pad[2]; /* for future expansion */
};
struct crypt_op {
uint32_t ses;
uint16_t op; /* i.e. COP_ENCRYPT */
#define COP_ENCRYPT 1
#define COP_DECRYPT 2
uint16_t flags;
#define COP_F_CIPHER_FIRST 0x0001 /* Cipher before MAC. */
#define COP_F_BATCH 0x0008 /* Batch op if possible */
u_int len;
const void *src; /* become iov[] inside kernel */
void *dst;
void *mac; /* must be big enough for chosen MAC */
const void *iv;
};
/* op and flags the same as crypt_op */
struct crypt_aead {
uint32_t ses;
uint16_t op; /* i.e. COP_ENCRYPT */
uint16_t flags;
u_int len;
u_int aadlen;
u_int ivlen;
const void *src; /* become iov[] inside kernel */
void *dst;
const void *aad; /* additional authenticated data */
void *tag; /* must fit for chosen TAG length */
const void *iv;
};
/*
* Parameters for looking up a crypto driver/device by
* device name or by id. The latter are returned for
* created sessions (crid) and completed key operations.
*/
struct crypt_find_op {
int crid; /* driver id + flags */
char name[32]; /* device/driver name */
};
#define CIOCGSESSION _IOWR('c', 101, struct session_op)
#define CIOCFSESSION _IOW('c', 102, uint32_t)
#define CIOCCRYPT _IOWR('c', 103, struct crypt_op)
#define CIOCGSESSION2 _IOWR('c', 106, struct session2_op)
#define CIOCFINDDEV _IOWR('c', 108, struct crypt_find_op)
#define CIOCCRYPTAEAD _IOWR('c', 109, struct crypt_aead)
struct cryptostats {
uint64_t cs_ops; /* symmetric crypto ops submitted */
uint64_t cs_errs; /* symmetric crypto ops that failed */
uint64_t cs_kops; /* asymetric/key ops submitted */
uint64_t cs_kerrs; /* asymetric/key ops that failed */
uint64_t cs_intrs; /* crypto swi thread activations */
uint64_t cs_rets; /* crypto return thread activations */
uint64_t cs_blocks; /* symmetric op driver block */
uint64_t cs_kblocks; /* symmetric op driver block */
};
#ifdef _KERNEL
/*
* Return values for cryptodev_probesession methods.
*/
#define CRYPTODEV_PROBE_HARDWARE (-100)
#define CRYPTODEV_PROBE_ACCEL_SOFTWARE (-200)
#define CRYPTODEV_PROBE_SOFTWARE (-500)
#if 0
#define CRYPTDEB(s, ...) do { \
printf("%s:%d: " s "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
} while (0)
#else
#define CRYPTDEB(...) do { } while (0)
#endif
struct crypto_session_params {
int csp_mode; /* Type of operations to perform. */
#define CSP_MODE_NONE 0
#define CSP_MODE_COMPRESS 1 /* Compression/decompression. */
#define CSP_MODE_CIPHER 2 /* Encrypt/decrypt. */
#define CSP_MODE_DIGEST 3 /* Compute/verify digest. */
#define CSP_MODE_AEAD 4 /* Combined auth/encryption. */
#define CSP_MODE_ETA 5 /* IPsec style encrypt-then-auth */
int csp_flags;
#define CSP_F_SEPARATE_OUTPUT 0x0001 /* Requests can use separate output */
#define CSP_F_SEPARATE_AAD 0x0002 /* Requests can use separate AAD */
#define CSP_F_ESN 0x0004 /* Requests can use seperate ESN field */
int csp_ivlen; /* IV length in bytes. */
int csp_cipher_alg;
int csp_cipher_klen; /* Key length in bytes. */
const void *csp_cipher_key;
int csp_auth_alg;
int csp_auth_klen; /* Key length in bytes. */
const void *csp_auth_key;
int csp_auth_mlen; /* Number of digest bytes to use.
0 means all. */
};
enum crypto_buffer_type {
CRYPTO_BUF_NONE = 0,
CRYPTO_BUF_CONTIG,
CRYPTO_BUF_UIO,
CRYPTO_BUF_MBUF,
CRYPTO_BUF_VMPAGE,
CRYPTO_BUF_SINGLE_MBUF,
CRYPTO_BUF_LAST = CRYPTO_BUF_SINGLE_MBUF
};
/*
* Description of a data buffer for a request. Requests can either
* have a single buffer that is modified in place or separate input
* and output buffers.
*/
struct crypto_buffer {
union {
struct {
char *cb_buf;
int cb_buf_len;
};
struct mbuf *cb_mbuf;
struct {
vm_page_t *cb_vm_page;
int cb_vm_page_len;
int cb_vm_page_offset;
};
struct uio *cb_uio;
};
enum crypto_buffer_type cb_type;
};
/*
* A cursor is used to iterate through a crypto request data buffer.
*/
struct crypto_buffer_cursor {
union {
char *cc_buf;
struct mbuf *cc_mbuf;
struct iovec *cc_iov;
vm_page_t *cc_vmpage;
};
/* Optional bytes of valid data remaining */
int cc_buf_len;
/*
* Optional offset within the current buffer segment where
* valid data begins
*/
size_t cc_offset;
enum crypto_buffer_type cc_type;
};
/* Structure describing complete operation */
struct cryptop {
TAILQ_ENTRY(cryptop) crp_next;
struct task crp_task;
crypto_session_t crp_session; /* Session */
int crp_olen; /* Result total length */
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_session 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_CBIMM 0x0010 /* Do callback immediately */
#define CRYPTO_F_DONE 0x0020 /* Operation completed */
#define CRYPTO_F_CBIFSYNC 0x0040 /* Do CBIMM if op is synchronous */
#define CRYPTO_F_ASYNC_ORDERED 0x0100 /* Completions must happen in order */
#define CRYPTO_F_IV_SEPARATE 0x0200 /* Use crp_iv[] as IV. */
int crp_op;
struct crypto_buffer crp_buf;
struct crypto_buffer crp_obuf;
void *crp_aad; /* AAD buffer. */
int crp_aad_start; /* Location of AAD. */
int crp_aad_length; /* 0 => no AAD. */
uint8_t crp_esn[4]; /* high-order ESN */
int crp_iv_start; /* Location of IV. IV length is from
* the session.
*/
int crp_payload_start; /* Location of ciphertext. */
int crp_payload_output_start;
int crp_payload_length;
int crp_digest_start; /* Location of MAC/tag. Length is
* from the session.
*/
uint8_t crp_iv[EALG_MAX_BLOCK_LEN]; /* IV if IV_SEPARATE. */
const void *crp_cipher_key; /* New cipher key if non-NULL. */
const void *crp_auth_key; /* New auth key if non-NULL. */
void *crp_opaque; /* Opaque pointer, passed along */
int (*crp_callback)(struct cryptop *); /* Callback function */
struct bintime crp_tstamp; /* performance time stamp */
uint32_t crp_seq; /* used for ordered dispatch */
uint32_t crp_retw_id; /*
* the return worker to be used,
* used for ordered dispatch
*/
};
TAILQ_HEAD(cryptopq, cryptop);
static __inline void
_crypto_use_buf(struct crypto_buffer *cb, void *buf, int len)
{
cb->cb_buf = buf;
cb->cb_buf_len = len;
cb->cb_type = CRYPTO_BUF_CONTIG;
}
static __inline void
_crypto_use_mbuf(struct crypto_buffer *cb, struct mbuf *m)
{
cb->cb_mbuf = m;
cb->cb_type = CRYPTO_BUF_MBUF;
}
static __inline void
_crypto_use_single_mbuf(struct crypto_buffer *cb, struct mbuf *m)
{
cb->cb_mbuf = m;
cb->cb_type = CRYPTO_BUF_SINGLE_MBUF;
}
static __inline void
_crypto_use_vmpage(struct crypto_buffer *cb, vm_page_t *pages, int len,
int offset)
{
cb->cb_vm_page = pages;
cb->cb_vm_page_len = len;
cb->cb_vm_page_offset = offset;
cb->cb_type = CRYPTO_BUF_VMPAGE;
}
static __inline void
_crypto_use_uio(struct crypto_buffer *cb, struct uio *uio)
{
cb->cb_uio = uio;
cb->cb_type = CRYPTO_BUF_UIO;
}
static __inline void
crypto_use_buf(struct cryptop *crp, void *buf, int len)
{
_crypto_use_buf(&crp->crp_buf, buf, len);
}
static __inline void
crypto_use_mbuf(struct cryptop *crp, struct mbuf *m)
{
_crypto_use_mbuf(&crp->crp_buf, m);
}
static __inline void
crypto_use_single_mbuf(struct cryptop *crp, struct mbuf *m)
{
_crypto_use_single_mbuf(&crp->crp_buf, m);
}
static __inline void
crypto_use_vmpage(struct cryptop *crp, vm_page_t *pages, int len, int offset)
{
_crypto_use_vmpage(&crp->crp_buf, pages, len, offset);
}
static __inline void
crypto_use_uio(struct cryptop *crp, struct uio *uio)
{
_crypto_use_uio(&crp->crp_buf, uio);
}
static __inline void
crypto_use_output_buf(struct cryptop *crp, void *buf, int len)
{
_crypto_use_buf(&crp->crp_obuf, buf, len);
}
static __inline void
crypto_use_output_mbuf(struct cryptop *crp, struct mbuf *m)
{
_crypto_use_mbuf(&crp->crp_obuf, m);
}
static __inline void
crypto_use_output_single_mbuf(struct cryptop *crp, struct mbuf *m)
{
_crypto_use_single_mbuf(&crp->crp_obuf, m);
}
static __inline void
crypto_use_output_vmpage(struct cryptop *crp, vm_page_t *pages, int len,
int offset)
{
_crypto_use_vmpage(&crp->crp_obuf, pages, len, offset);
}
static __inline void
crypto_use_output_uio(struct cryptop *crp, struct uio *uio)
{
_crypto_use_uio(&crp->crp_obuf, uio);
}
#define CRYPTO_HAS_OUTPUT_BUFFER(crp) \
((crp)->crp_obuf.cb_type != CRYPTO_BUF_NONE)
/* Flags in crp_op. */
#define CRYPTO_OP_DECRYPT 0x0
#define CRYPTO_OP_ENCRYPT 0x1
#define CRYPTO_OP_IS_ENCRYPT(op) ((op) & CRYPTO_OP_ENCRYPT)
#define CRYPTO_OP_COMPUTE_DIGEST 0x0
#define CRYPTO_OP_VERIFY_DIGEST 0x2
#define CRYPTO_OP_DECOMPRESS CRYPTO_OP_DECRYPT
#define CRYPTO_OP_COMPRESS CRYPTO_OP_ENCRYPT
#define CRYPTO_OP_IS_COMPRESS(op) ((op) & CRYPTO_OP_COMPRESS)
/*
* Hints passed to process methods.
*/
#define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */
uint32_t crypto_ses2hid(crypto_session_t crypto_session);
uint32_t crypto_ses2caps(crypto_session_t crypto_session);
void *crypto_get_driver_session(crypto_session_t crypto_session);
const struct crypto_session_params *crypto_get_params(
crypto_session_t crypto_session);
const struct auth_hash *crypto_auth_hash(const struct crypto_session_params *csp);
const struct enc_xform *crypto_cipher(const struct crypto_session_params *csp);
MALLOC_DECLARE(M_CRYPTO_DATA);
extern int crypto_newsession(crypto_session_t *cses,
const struct crypto_session_params *params, int hard);
extern void crypto_freesession(crypto_session_t cses);
#define CRYPTOCAP_F_HARDWARE CRYPTO_FLAG_HARDWARE
#define CRYPTOCAP_F_SOFTWARE CRYPTO_FLAG_SOFTWARE
#define CRYPTOCAP_F_SYNC 0x04000000 /* operates synchronously */
#define CRYPTOCAP_F_ACCEL_SOFTWARE 0x08000000
#define CRYPTO_SESS_SYNC(sess) \
((crypto_ses2caps(sess) & CRYPTOCAP_F_SYNC) != 0)
extern int32_t crypto_get_driverid(device_t dev, size_t session_size,
int flags);
extern int crypto_find_driver(const char *);
extern device_t crypto_find_device_byhid(int hid);
extern int crypto_getcaps(int hid);
extern int crypto_unregister_all(uint32_t driverid);
extern int crypto_dispatch(struct cryptop *crp);
#define CRYPTO_ASYNC_ORDERED 0x1 /* complete in order dispatched */
extern int crypto_dispatch_async(struct cryptop *crp, int flags);
extern void crypto_dispatch_batch(struct cryptopq *crpq, int flags);
#define CRYPTO_SYMQ 0x1
extern int crypto_unblock(uint32_t, int);
extern void crypto_done(struct cryptop *crp);
extern void crypto_destroyreq(struct cryptop *crp);
extern void crypto_initreq(struct cryptop *crp, crypto_session_t cses);
extern void crypto_freereq(struct cryptop *crp);
extern struct cryptop *crypto_getreq(crypto_session_t cses, int how);
extern int crypto_usercrypto; /* userland may do crypto requests */
extern int crypto_devallowsoft; /* only use hardware crypto */
#ifdef SYSCTL_DECL
SYSCTL_DECL(_kern_crypto);
#endif
/* Helper routines for drivers to initialize auth contexts for HMAC. */
struct auth_hash;
void hmac_init_ipad(const struct auth_hash *axf, const char *key, int klen,
void *auth_ctx);
void hmac_init_opad(const struct auth_hash *axf, const char *key, int klen,
void *auth_ctx);
/*
* Crypto-related utility routines used mainly by drivers.
*
* Similar to m_copyback/data, *_copyback copy data from the 'src'
* buffer into the crypto request's data buffer while *_copydata copy
* data from the crypto request's data buffer into the the 'dst'
* buffer.
*/
void crypto_copyback(struct cryptop *crp, int off, int size,
const void *src);
void crypto_copydata(struct cryptop *crp, int off, int size, void *dst);
int crypto_apply(struct cryptop *crp, int off, int len,
int (*f)(void *, const void *, u_int), void *arg);
void *crypto_contiguous_subsegment(struct cryptop *crp, size_t skip,
size_t len);
int crypto_apply_buf(struct crypto_buffer *cb, int off, int len,
int (*f)(void *, const void *, u_int), void *arg);
void *crypto_buffer_contiguous_subsegment(struct crypto_buffer *cb,
size_t skip, size_t len);
size_t crypto_buffer_len(struct crypto_buffer *cb);
void crypto_cursor_init(struct crypto_buffer_cursor *cc,
const struct crypto_buffer *cb);
void crypto_cursor_advance(struct crypto_buffer_cursor *cc, size_t amount);
void *crypto_cursor_segment(struct crypto_buffer_cursor *cc, size_t *len);
void crypto_cursor_copyback(struct crypto_buffer_cursor *cc, int size,
const void *vsrc);
void crypto_cursor_copydata(struct crypto_buffer_cursor *cc, int size,
void *vdst);
void crypto_cursor_copydata_noadv(struct crypto_buffer_cursor *cc, int size,
void *vdst);
static __inline void
crypto_read_iv(struct cryptop *crp, void *iv)
{
const struct crypto_session_params *csp;
csp = crypto_get_params(crp->crp_session);
if (crp->crp_flags & CRYPTO_F_IV_SEPARATE)
memcpy(iv, crp->crp_iv, csp->csp_ivlen);
else
crypto_copydata(crp, crp->crp_iv_start, csp->csp_ivlen, iv);
}
static __inline size_t
ccm_max_payload_length(const struct crypto_session_params *csp)
{
/* RFC 3160 */
const u_int L = 15 - csp->csp_ivlen;
switch (L) {
case 2:
return (0xffff);
case 3:
return (0xffffff);
#ifdef __LP64__
case 4:
return (0xffffffff);
case 5:
return (0xffffffffff);
case 6:
return (0xffffffffffff);
case 7:
return (0xffffffffffffff);
default:
return (0xffffffffffffffff);
#else
default:
return (0xffffffff);
#endif
}
}
#endif /* _KERNEL */
#endif /* _CRYPTO_CRYPTO_H_ */
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