diff options
Diffstat (limited to 'target/linux/generic/files/crypto/ocf/cryptosoft.c')
| -rw-r--r-- | target/linux/generic/files/crypto/ocf/cryptosoft.c | 1322 |
1 files changed, 1322 insertions, 0 deletions
diff --git a/target/linux/generic/files/crypto/ocf/cryptosoft.c b/target/linux/generic/files/crypto/ocf/cryptosoft.c new file mode 100644 index 000000000..aa2383d1f --- /dev/null +++ b/target/linux/generic/files/crypto/ocf/cryptosoft.c @@ -0,0 +1,1322 @@ +/* + * An OCF module that uses the linux kernel cryptoapi, based on the + * original cryptosoft for BSD by Angelos D. Keromytis (angelos@cis.upenn.edu) + * but is mostly unrecognisable, + * + * Written by David McCullough <david_mccullough@mcafee.com> + * Copyright (C) 2004-2011 David McCullough + * Copyright (C) 2004-2005 Intel Corporation. + * + * LICENSE TERMS + * + * The free distribution and use of this software in both source and binary + * form is allowed (with or without changes) provided that: + * + * 1. distributions of this source code include the above copyright + * notice, this list of conditions and the following disclaimer; + * + * 2. distributions in binary form include the above copyright + * notice, this list of conditions and the following disclaimer + * in the documentation and/or other associated materials; + * + * 3. the copyright holder's name is not used to endorse products + * built using this software without specific written permission. + * + * ALTERNATIVELY, provided that this notice is retained in full, this product + * may be distributed under the terms of the GNU General Public License (GPL), + * in which case the provisions of the GPL apply INSTEAD OF those given above. + * + * DISCLAIMER + * + * This software is provided 'as is' with no explicit or implied warranties + * in respect of its properties, including, but not limited to, correctness + * and/or fitness for purpose. + * --------------------------------------------------------------------------- + */ + +#include <linux/version.h> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) && !defined(AUTOCONF_INCLUDED) +#include <linux/config.h> +#endif +#include <linux/module.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/sched.h> +#include <linux/wait.h> +#include <linux/crypto.h> +#include <linux/mm.h> +#include <linux/skbuff.h> +#include <linux/random.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10) +#include <linux/scatterlist.h> +#endif +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29) +#include <crypto/hash.h> +#endif + +#include <cryptodev.h> +#include <uio.h> + +struct { + softc_device_decl sc_dev; +} swcr_softc; + +#define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK) + +#define SW_TYPE_CIPHER 0x01 +#define SW_TYPE_HMAC 0x02 +#define SW_TYPE_HASH 0x04 +#define SW_TYPE_COMP 0x08 +#define SW_TYPE_BLKCIPHER 0x10 +#define SW_TYPE_ALG_MASK 0x1f + +#define SW_TYPE_ASYNC 0x8000 + +#define SW_TYPE_INUSE 0x10000000 + +/* We change some of the above if we have an async interface */ + +#define SW_TYPE_ALG_AMASK (SW_TYPE_ALG_MASK | SW_TYPE_ASYNC) + +#define SW_TYPE_ABLKCIPHER (SW_TYPE_BLKCIPHER | SW_TYPE_ASYNC) +#define SW_TYPE_AHASH (SW_TYPE_HASH | SW_TYPE_ASYNC) +#define SW_TYPE_AHMAC (SW_TYPE_HMAC | SW_TYPE_ASYNC) + +#define SCATTERLIST_MAX 16 + +struct swcr_data { + struct work_struct workq; + int sw_type; + int sw_alg; + struct crypto_tfm *sw_tfm; + spinlock_t sw_tfm_lock; + union { + struct { + char *sw_key; + int sw_klen; + int sw_mlen; + } hmac; + void *sw_comp_buf; + } u; + struct swcr_data *sw_next; +}; + +struct swcr_req { + struct swcr_data *sw_head; + struct swcr_data *sw; + struct cryptop *crp; + struct cryptodesc *crd; + struct scatterlist sg[SCATTERLIST_MAX]; + unsigned char iv[EALG_MAX_BLOCK_LEN]; + char result[HASH_MAX_LEN]; + void *crypto_req; +}; + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) +static kmem_cache_t *swcr_req_cache; +#else +static struct kmem_cache *swcr_req_cache; +#endif + +#ifndef CRYPTO_TFM_MODE_CBC +/* + * As of linux-2.6.21 this is no longer defined, and presumably no longer + * needed to be passed into the crypto core code. + */ +#define CRYPTO_TFM_MODE_CBC 0 +#define CRYPTO_TFM_MODE_ECB 0 +#endif + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) + /* + * Linux 2.6.19 introduced a new Crypto API, setup macro's to convert new + * API into old API. + */ + + /* Symmetric/Block Cipher */ + struct blkcipher_desc + { + struct crypto_tfm *tfm; + void *info; + }; + #define ecb(X) #X , CRYPTO_TFM_MODE_ECB + #define cbc(X) #X , CRYPTO_TFM_MODE_CBC + #define crypto_has_blkcipher(X, Y, Z) crypto_alg_available(X, 0) + #define crypto_blkcipher_cast(X) X + #define crypto_blkcipher_tfm(X) X + #define crypto_alloc_blkcipher(X, Y, Z) crypto_alloc_tfm(X, mode) + #define crypto_blkcipher_ivsize(X) crypto_tfm_alg_ivsize(X) + #define crypto_blkcipher_blocksize(X) crypto_tfm_alg_blocksize(X) + #define crypto_blkcipher_setkey(X, Y, Z) crypto_cipher_setkey(X, Y, Z) + #define crypto_blkcipher_encrypt_iv(W, X, Y, Z) \ + crypto_cipher_encrypt_iv((W)->tfm, X, Y, Z, (u8 *)((W)->info)) + #define crypto_blkcipher_decrypt_iv(W, X, Y, Z) \ + crypto_cipher_decrypt_iv((W)->tfm, X, Y, Z, (u8 *)((W)->info)) + #define crypto_blkcipher_set_flags(x, y) /* nop */ + #define crypto_free_blkcipher(x) crypto_free_tfm(x) + #define crypto_free_comp crypto_free_tfm + #define crypto_free_hash crypto_free_tfm + + /* Hash/HMAC/Digest */ + struct hash_desc + { + struct crypto_tfm *tfm; + }; + #define hmac(X) #X , 0 + #define crypto_has_hash(X, Y, Z) crypto_alg_available(X, 0) + #define crypto_hash_cast(X) X + #define crypto_hash_tfm(X) X + #define crypto_alloc_hash(X, Y, Z) crypto_alloc_tfm(X, mode) + #define crypto_hash_digestsize(X) crypto_tfm_alg_digestsize(X) + #define crypto_hash_digest(W, X, Y, Z) \ + crypto_digest_digest((W)->tfm, X, sg_num, Z) + + /* Asymmetric Cipher */ + #define crypto_has_cipher(X, Y, Z) crypto_alg_available(X, 0) + + /* Compression */ + #define crypto_has_comp(X, Y, Z) crypto_alg_available(X, 0) + #define crypto_comp_tfm(X) X + #define crypto_comp_cast(X) X + #define crypto_alloc_comp(X, Y, Z) crypto_alloc_tfm(X, mode) + #define plain(X) #X , 0 +#else + #define ecb(X) "ecb(" #X ")" , 0 + #define cbc(X) "cbc(" #X ")" , 0 + #define hmac(X) "hmac(" #X ")" , 0 + #define plain(X) #X , 0 +#endif /* if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) */ + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22) +/* no ablkcipher in older kernels */ +#define crypto_alloc_ablkcipher(a,b,c) (NULL) +#define crypto_ablkcipher_tfm(x) ((struct crypto_tfm *)(x)) +#define crypto_ablkcipher_set_flags(a, b) /* nop */ +#define crypto_ablkcipher_setkey(x, y, z) (-EINVAL) +#define crypto_has_ablkcipher(a,b,c) (0) +#else +#define HAVE_ABLKCIPHER +#endif + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32) +/* no ahash in older kernels */ +#define crypto_ahash_tfm(x) ((struct crypto_tfm *)(x)) +#define crypto_alloc_ahash(a,b,c) (NULL) +#define crypto_ahash_digestsize(x) 0 +#else +#define HAVE_AHASH +#endif + +struct crypto_details { + char *alg_name; + int mode; + int sw_type; +}; + +static struct crypto_details crypto_details[] = { + [CRYPTO_DES_CBC] = { cbc(des), SW_TYPE_BLKCIPHER, }, + [CRYPTO_3DES_CBC] = { cbc(des3_ede), SW_TYPE_BLKCIPHER, }, + [CRYPTO_BLF_CBC] = { cbc(blowfish), SW_TYPE_BLKCIPHER, }, + [CRYPTO_CAST_CBC] = { cbc(cast5), SW_TYPE_BLKCIPHER, }, + [CRYPTO_SKIPJACK_CBC] = { cbc(skipjack), SW_TYPE_BLKCIPHER, }, + [CRYPTO_MD5_HMAC] = { hmac(md5), SW_TYPE_HMAC, }, + [CRYPTO_SHA1_HMAC] = { hmac(sha1), SW_TYPE_HMAC, }, + [CRYPTO_RIPEMD160_HMAC] = { hmac(ripemd160), SW_TYPE_HMAC, }, + [CRYPTO_MD5_KPDK] = { plain(md5-kpdk), SW_TYPE_HASH, }, + [CRYPTO_SHA1_KPDK] = { plain(sha1-kpdk), SW_TYPE_HASH, }, + [CRYPTO_AES_CBC] = { cbc(aes), SW_TYPE_BLKCIPHER, }, + [CRYPTO_ARC4] = { ecb(arc4), SW_TYPE_BLKCIPHER, }, + [CRYPTO_MD5] = { plain(md5), SW_TYPE_HASH, }, + [CRYPTO_SHA1] = { plain(sha1), SW_TYPE_HASH, }, + [CRYPTO_NULL_HMAC] = { hmac(digest_null), SW_TYPE_HMAC, }, + [CRYPTO_NULL_CBC] = { cbc(cipher_null), SW_TYPE_BLKCIPHER, }, + [CRYPTO_DEFLATE_COMP] = { plain(deflate), SW_TYPE_COMP, }, + [CRYPTO_SHA2_256_HMAC] = { hmac(sha256), SW_TYPE_HMAC, }, + [CRYPTO_SHA2_384_HMAC] = { hmac(sha384), SW_TYPE_HMAC, }, + [CRYPTO_SHA2_512_HMAC] = { hmac(sha512), SW_TYPE_HMAC, }, + [CRYPTO_CAMELLIA_CBC] = { cbc(camellia), SW_TYPE_BLKCIPHER, }, + [CRYPTO_SHA2_256] = { plain(sha256), SW_TYPE_HASH, }, + [CRYPTO_SHA2_384] = { plain(sha384), SW_TYPE_HASH, }, + [CRYPTO_SHA2_512] = { plain(sha512), SW_TYPE_HASH, }, + [CRYPTO_RIPEMD160] = { plain(ripemd160), SW_TYPE_HASH, }, +}; + +int32_t swcr_id = -1; +module_param(swcr_id, int, 0444); +MODULE_PARM_DESC(swcr_id, "Read-Only OCF ID for cryptosoft driver"); + +int swcr_fail_if_compression_grows = 1; +module_param(swcr_fail_if_compression_grows, int, 0644); +MODULE_PARM_DESC(swcr_fail_if_compression_grows, + "Treat compression that results in more data as a failure"); + +int swcr_no_ahash = 0; +module_param(swcr_no_ahash, int, 0644); +MODULE_PARM_DESC(swcr_no_ahash, + "Do not use async hash/hmac even if available"); + +int swcr_no_ablk = 0; +module_param(swcr_no_ablk, int, 0644); +MODULE_PARM_DESC(swcr_no_ablk, + "Do not use async blk ciphers even if available"); + +static struct swcr_data **swcr_sessions = NULL; +static u_int32_t swcr_sesnum = 0; + +static int swcr_process(device_t, struct cryptop *, int); +static int swcr_newsession(device_t, u_int32_t *, struct cryptoini *); +static int swcr_freesession(device_t, u_int64_t); + +static device_method_t swcr_methods = { + /* crypto device methods */ + DEVMETHOD(cryptodev_newsession, swcr_newsession), + DEVMETHOD(cryptodev_freesession,swcr_freesession), + DEVMETHOD(cryptodev_process, swcr_process), +}; + +#define debug swcr_debug +int swcr_debug = 0; +module_param(swcr_debug, int, 0644); +MODULE_PARM_DESC(swcr_debug, "Enable debug"); + +static void swcr_process_req(struct swcr_req *req); + +/* + * somethings just need to be run with user context no matter whether + * the kernel compression libs use vmalloc/vfree for example. + */ + +typedef struct { + struct work_struct wq; + void (*func)(void *arg); + void *arg; +} execute_later_t; + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20) +static void +doing_it_now(struct work_struct *wq) +{ + execute_later_t *w = container_of(wq, execute_later_t, wq); + (w->func)(w->arg); + kfree(w); +} +#else +static void +doing_it_now(void *arg) +{ + execute_later_t *w = (execute_later_t *) arg; + (w->func)(w->arg); + kfree(w); +} +#endif + +static void +execute_later(void (fn)(void *), void *arg) +{ + execute_later_t *w; + + w = (execute_later_t *) kmalloc(sizeof(execute_later_t), SLAB_ATOMIC); + if (w) { + memset(w, '\0', sizeof(w)); + w->func = fn; + w->arg = arg; +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20) + INIT_WORK(&w->wq, doing_it_now); +#else + INIT_WORK(&w->wq, doing_it_now, w); +#endif + schedule_work(&w->wq); + } +} + +/* + * Generate a new software session. + */ +static int +swcr_newsession(device_t dev, u_int32_t *sid, struct cryptoini *cri) +{ + struct swcr_data **swd; + u_int32_t i; + int error; + char *algo; + int mode; + + dprintk("%s()\n", __FUNCTION__); + if (sid == NULL || cri == NULL) { + dprintk("%s,%d - EINVAL\n", __FILE__, __LINE__); + return EINVAL; + } + + if (swcr_sessions) { + for (i = 1; i < swcr_sesnum; i++) + if (swcr_sessions[i] == NULL) + break; + } else + i = 1; /* NB: to silence compiler warning */ + + if (swcr_sessions == NULL || i == swcr_sesnum) { + if (swcr_sessions == NULL) { + i = 1; /* We leave swcr_sessions[0] empty */ + swcr_sesnum = CRYPTO_SW_SESSIONS; + } else + swcr_sesnum *= 2; + + swd = kmalloc(swcr_sesnum * sizeof(struct swcr_data *), SLAB_ATOMIC); + if (swd == NULL) { + /* Reset session number */ + if (swcr_sesnum == CRYPTO_SW_SESSIONS) + swcr_sesnum = 0; + else + swcr_sesnum /= 2; + dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__); + return ENOBUFS; + } + memset(swd, 0, swcr_sesnum * sizeof(struct swcr_data *)); + + /* Copy existing sessions */ + if (swcr_sessions) { + memcpy(swd, swcr_sessions, + (swcr_sesnum / 2) * sizeof(struct swcr_data *)); + kfree(swcr_sessions); + } + + swcr_sessions = swd; + } + + swd = &swcr_sessions[i]; + *sid = i; + + while (cri) { + *swd = (struct swcr_data *) kmalloc(sizeof(struct swcr_data), + SLAB_ATOMIC); + if (*swd == NULL) { + swcr_freesession(NULL, i); + dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__); + return ENOBUFS; + } + memset(*swd, 0, sizeof(struct swcr_data)); + + if (cri->cri_alg < 0 || + cri->cri_alg>=sizeof(crypto_details)/sizeof(crypto_details[0])){ + printk("cryptosoft: Unknown algorithm 0x%x\n", cri->cri_alg); + swcr_freesession(NULL, i); + return EINVAL; + } + + algo = crypto_details[cri->cri_alg].alg_name; + if (!algo || !*algo) { + printk("cryptosoft: Unsupported algorithm 0x%x\n", cri->cri_alg); + swcr_freesession(NULL, i); + return EINVAL; + } + + mode = crypto_details[cri->cri_alg].mode; + (*swd)->sw_type = crypto_details[cri->cri_alg].sw_type; + (*swd)->sw_alg = cri->cri_alg; + + spin_lock_init(&(*swd)->sw_tfm_lock); + + /* Algorithm specific configuration */ + switch (cri->cri_alg) { + case CRYPTO_NULL_CBC: + cri->cri_klen = 0; /* make it work with crypto API */ + break; + default: + break; + } + + if ((*swd)->sw_type & SW_TYPE_BLKCIPHER) { + dprintk("%s crypto_alloc_*blkcipher(%s, 0x%x)\n", __FUNCTION__, + algo, mode); + + /* try async first */ + (*swd)->sw_tfm = swcr_no_ablk ? NULL : + crypto_ablkcipher_tfm(crypto_alloc_ablkcipher(algo, 0, 0)); + if ((*swd)->sw_tfm && !IS_ERR((*swd)->sw_tfm)) { + dprintk("%s %s cipher is async\n", __FUNCTION__, algo); + (*swd)->sw_type |= SW_TYPE_ASYNC; + } else { + (*swd)->sw_tfm = crypto_blkcipher_tfm( + crypto_alloc_blkcipher(algo, 0, CRYPTO_ALG_ASYNC)); + if ((*swd)->sw_tfm && !IS_ERR((*swd)->sw_tfm)) + dprintk("%s %s cipher is sync\n", __FUNCTION__, algo); + } + if (!(*swd)->sw_tfm || IS_ERR((*swd)->sw_tfm)) { + int err; + dprintk("cryptosoft: crypto_alloc_blkcipher failed(%s, 0x%x)\n", + algo,mode); + err = IS_ERR((*swd)->sw_tfm) ? -(PTR_ERR((*swd)->sw_tfm)) : EINVAL; + (*swd)->sw_tfm = NULL; /* ensure NULL */ + swcr_freesession(NULL, i); + return err; + } + + if (debug) { + dprintk("%s key:cri->cri_klen=%d,(cri->cri_klen + 7)/8=%d", + __FUNCTION__, cri->cri_klen, (cri->cri_klen + 7) / 8); + for (i = 0; i < (cri->cri_klen + 7) / 8; i++) + dprintk("%s0x%x", (i % 8) ? " " : "\n ", + cri->cri_key[i] & 0xff); + dprintk("\n"); + } + if ((*swd)->sw_type & SW_TYPE_ASYNC) { + /* OCF doesn't enforce keys */ + crypto_ablkcipher_set_flags( + __crypto_ablkcipher_cast((*swd)->sw_tfm), + CRYPTO_TFM_REQ_WEAK_KEY); + error = crypto_ablkcipher_setkey( + __crypto_ablkcipher_cast((*swd)->sw_tfm), + cri->cri_key, (cri->cri_klen + 7) / 8); + } else { + /* OCF doesn't enforce keys */ + crypto_blkcipher_set_flags( + crypto_blkcipher_cast((*swd)->sw_tfm), + CRYPTO_TFM_REQ_WEAK_KEY); + error = crypto_blkcipher_setkey( + crypto_blkcipher_cast((*swd)->sw_tfm), + cri->cri_key, (cri->cri_klen + 7) / 8); + } + if (error) { + printk("cryptosoft: setkey failed %d (crt_flags=0x%x)\n", error, + (*swd)->sw_tfm->crt_flags); + swcr_freesession(NULL, i); + return error; + } + } else if ((*swd)->sw_type & (SW_TYPE_HMAC | SW_TYPE_HASH)) { + dprintk("%s crypto_alloc_*hash(%s, 0x%x)\n", __FUNCTION__, + algo, mode); + + /* try async first */ + (*swd)->sw_tfm = swcr_no_ahash ? NULL : + crypto_ahash_tfm(crypto_alloc_ahash(algo, 0, 0)); + if ((*swd)->sw_tfm) { + dprintk("%s %s hash is async\n", __FUNCTION__, algo); + (*swd)->sw_type |= SW_TYPE_ASYNC; + } else { + dprintk("%s %s hash is sync\n", __FUNCTION__, algo); + (*swd)->sw_tfm = crypto_hash_tfm( + crypto_alloc_hash(algo, 0, CRYPTO_ALG_ASYNC)); + } + + if (!(*swd)->sw_tfm) { + dprintk("cryptosoft: crypto_alloc_hash failed(%s,0x%x)\n", + algo, mode); + swcr_freesession(NULL, i); + return EINVAL; + } + + (*swd)->u.hmac.sw_klen = (cri->cri_klen + 7) / 8; + (*swd)->u.hmac.sw_key = (char *)kmalloc((*swd)->u.hmac.sw_klen, + SLAB_ATOMIC); + if ((*swd)->u.hmac.sw_key == NULL) { + swcr_freesession(NULL, i); + dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__); + return ENOBUFS; + } + memcpy((*swd)->u.hmac.sw_key, cri->cri_key, (*swd)->u.hmac.sw_klen); + if (cri->cri_mlen) { + (*swd)->u.hmac.sw_mlen = cri->cri_mlen; + } else if ((*swd)->sw_type & SW_TYPE_ASYNC) { + (*swd)->u.hmac.sw_mlen = crypto_ahash_digestsize( + __crypto_ahash_cast((*swd)->sw_tfm)); + } else { + (*swd)->u.hmac.sw_mlen = crypto_hash_digestsize( + crypto_hash_cast((*swd)->sw_tfm)); + } + } else if ((*swd)->sw_type & SW_TYPE_COMP) { + (*swd)->sw_tfm = crypto_comp_tfm( + crypto_alloc_comp(algo, 0, CRYPTO_ALG_ASYNC)); + if (!(*swd)->sw_tfm) { + dprintk("cryptosoft: crypto_alloc_comp failed(%s,0x%x)\n", + algo, mode); + swcr_freesession(NULL, i); + return EINVAL; + } + (*swd)->u.sw_comp_buf = kmalloc(CRYPTO_MAX_DATA_LEN, SLAB_ATOMIC); + if ((*swd)->u.sw_comp_buf == NULL) { + swcr_freesession(NULL, i); + dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__); + return ENOBUFS; + } + } else { + printk("cryptosoft: Unhandled sw_type %d\n", (*swd)->sw_type); + swcr_freesession(NULL, i); + return EINVAL; + } + + cri = cri->cri_next; + swd = &((*swd)->sw_next); + } + return 0; +} + +/* + * Free a session. + */ +static int +swcr_freesession(device_t dev, u_int64_t tid) +{ + struct swcr_data *swd; + u_int32_t sid = CRYPTO_SESID2LID(tid); + + dprintk("%s()\n", __FUNCTION__); + if (sid > swcr_sesnum || swcr_sessions == NULL || + swcr_sessions[sid] == NULL) { + dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__); + return(EINVAL); + } + + /* Silently accept and return */ + if (sid == 0) + return(0); + + while ((swd = swcr_sessions[sid]) != NULL) { + swcr_sessions[sid] = swd->sw_next; + if (swd->sw_tfm) { + switch (swd->sw_type & SW_TYPE_ALG_AMASK) { +#ifdef HAVE_AHASH + case SW_TYPE_AHMAC: + case SW_TYPE_AHASH: + crypto_free_ahash(__crypto_ahash_cast(swd->sw_tfm)); + break; +#endif +#ifdef HAVE_ABLKCIPHER + case SW_TYPE_ABLKCIPHER: + crypto_free_ablkcipher(__crypto_ablkcipher_cast(swd->sw_tfm)); + break; +#endif + case SW_TYPE_BLKCIPHER: + crypto_free_blkcipher(crypto_blkcipher_cast(swd->sw_tfm)); + break; + case SW_TYPE_HMAC: + case SW_TYPE_HASH: + crypto_free_hash(crypto_hash_cast(swd->sw_tfm)); + break; + case SW_TYPE_COMP: + if (in_interrupt()) + execute_later((void (*)(void *))crypto_free_comp, (void *)crypto_comp_cast(swd->sw_tfm)); + else + crypto_free_comp(crypto_comp_cast(swd->sw_tfm)); + break; + default: + crypto_free_tfm(swd->sw_tfm); + break; + } + swd->sw_tfm = NULL; + } + if (swd->sw_type & SW_TYPE_COMP) { + if (swd->u.sw_comp_buf) + kfree(swd->u.sw_comp_buf); + } else { + if (swd->u.hmac.sw_key) + kfree(swd->u.hmac.sw_key); + } + kfree(swd); + } + return 0; +} + +static void swcr_process_req_complete(struct swcr_req *req) +{ + dprintk("%s()\n", __FUNCTION__); + + if (req->sw->sw_type & SW_TYPE_INUSE) { + unsigned long flags; + spin_lock_irqsave(&req->sw->sw_tfm_lock, flags); + req->sw->sw_type &= ~SW_TYPE_INUSE; + spin_unlock_irqrestore(&req->sw->sw_tfm_lock, flags); + } + + if (req->crp->crp_etype) + goto done; + + switch (req->sw->sw_type & SW_TYPE_ALG_AMASK) { +#if defined(HAVE_AHASH) + case SW_TYPE_AHMAC: + case SW_TYPE_AHASH: + crypto_copyback(req->crp->crp_flags, req->crp->crp_buf, + req->crd->crd_inject, req->sw->u.hmac.sw_mlen, req->result); + ahash_request_free(req->crypto_req); + break; +#endif +#if defined(HAVE_ABLKCIPHER) + case SW_TYPE_ABLKCIPHER: + ablkcipher_request_free(req->crypto_req); + break; +#endif + case SW_TYPE_CIPHER: + case SW_TYPE_HMAC: + case SW_TYPE_HASH: + case SW_TYPE_COMP: + case SW_TYPE_BLKCIPHER: + break; + default: + req->crp->crp_etype = EINVAL; + goto done; + } + + req->crd = req->crd->crd_next; + if (req->crd) { + swcr_process_req(req); + return; + } + +done: + dprintk("%s crypto_done %p\n", __FUNCTION__, req); + crypto_done(req->crp); + kmem_cache_free(swcr_req_cache, req); +} + +#if defined(HAVE_ABLKCIPHER) || defined(HAVE_AHASH) +static void swcr_process_callback(struct crypto_async_request *creq, int err) +{ + struct swcr_req *req = creq->data; + + dprintk("%s()\n", __FUNCTION__); + if (err) { + if (err == -EINPROGRESS) + return; + dprintk("%s() fail %d\n", __FUNCTION__, -err); + req->crp->crp_etype = -err; + } + + swcr_process_req_complete(req); +} +#endif /* defined(HAVE_ABLKCIPHER) || defined(HAVE_AHASH) */ + + +static void swcr_process_req(struct swcr_req *req) +{ + struct swcr_data *sw; + struct cryptop *crp = req->crp; + struct cryptodesc *crd = req->crd; + struct sk_buff *skb = (struct sk_buff *) crp->crp_buf; + struct uio *uiop = (struct uio *) crp->crp_buf; + int sg_num, sg_len, skip; + + dprintk("%s()\n", __FUNCTION__); + + /* + * Find the crypto context. + * + * XXX Note that the logic here prevents us from having + * XXX the same algorithm multiple times in a session + * XXX (or rather, we can but it won't give us the right + * XXX results). To do that, we'd need some way of differentiating + * XXX between the various instances of an algorithm (so we can + * XXX locate the correct crypto context). + */ + for (sw = req->sw_head; sw && sw->sw_alg != crd->crd_alg; sw = sw->sw_next) + ; + + /* No such context ? */ + if (sw == NULL) { + crp->crp_etype = EINVAL; + dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__); + goto done; + } + + /* + * for some types we need to ensure only one user as info is stored in + * the tfm during an operation that can get corrupted + */ + switch (sw->sw_type & SW_TYPE_ALG_AMASK) { +#ifdef HAVE_AHASH + case SW_TYPE_AHMAC: + case SW_TYPE_AHASH: +#endif + case SW_TYPE_HMAC: + case SW_TYPE_HASH: { + unsigned long flags; + spin_lock_irqsave(&sw->sw_tfm_lock, flags); + if (sw->sw_type & SW_TYPE_INUSE) { + spin_unlock_irqrestore(&sw->sw_tfm_lock, flags); + execute_later((void (*)(void *))swcr_process_req, (void *)req); + return; + } + sw->sw_type |= SW_TYPE_INUSE; + spin_unlock_irqrestore(&sw->sw_tfm_lock, flags); + } break; + } + + req->sw = sw; + skip = crd->crd_skip; + + /* + * setup the SG list skip from the start of the buffer + */ + memset(req->sg, 0, sizeof(req->sg)); + sg_init_table(req->sg, SCATTERLIST_MAX); + if (crp->crp_flags & CRYPTO_F_SKBUF) { + int i, len; + + sg_num = 0; + sg_len = 0; + + if (skip < skb_headlen(skb)) { + len = skb_headlen(skb) - skip; + if (len + sg_len > crd->crd_len) + len = crd->crd_len - sg_len; + sg_set_page(&req->sg[sg_num], + virt_to_page(skb->data + skip), len, + offset_in_page(skb->data + skip)); + sg_len += len; + sg_num++; + skip = 0; + } else + skip -= skb_headlen(skb); + + for (i = 0; sg_len < crd->crd_len && + i < skb_shinfo(skb)->nr_frags && + sg_num < SCATTERLIST_MAX; i++) { + if (skip < skb_shinfo(skb)->frags[i].size) { + len = skb_shinfo(skb)->frags[i].size - skip; + if (len + sg_len > crd->crd_len) + len = crd->crd_len - sg_len; + sg_set_page(&req->sg[sg_num], + skb_frag_page(&skb_shinfo(skb)->frags[i]), + len, + skb_shinfo(skb)->frags[i].page_offset + skip); + sg_len += len; + sg_num++; + skip = 0; + } else + skip -= skb_shinfo(skb)->frags[i].size; + } + } else if (crp->crp_flags & CRYPTO_F_IOV) { + int len; + + sg_len = 0; + for (sg_num = 0; sg_len < crd->crd_len && + sg_num < uiop->uio_iovcnt && + sg_num < SCATTERLIST_MAX; sg_num++) { + if (skip <= uiop->uio_iov[sg_num].iov_len) { + len = uiop->uio_iov[sg_num].iov_len - skip; + if (len + sg_len > crd->crd_len) + len = crd->crd_len - sg_len; + sg_set_page(&req->sg[sg_num], + virt_to_page(uiop->uio_iov[sg_num].iov_base+skip), + len, + offset_in_page(uiop->uio_iov[sg_num].iov_base+skip)); + sg_len += len; + skip = 0; + } else + skip -= uiop->uio_iov[sg_num].iov_len; + } + } else { + sg_len = (crp->crp_ilen - skip); + if (sg_len > crd->crd_len) + sg_len = crd->crd_len; + sg_set_page(&req->sg[0], virt_to_page(crp->crp_buf + skip), + sg_len, offset_in_page(crp->crp_buf + skip)); + sg_num = 1; + } + if (sg_num > 0) + sg_mark_end(&req->sg[sg_num-1]); + + switch (sw->sw_type & SW_TYPE_ALG_AMASK) { + +#ifdef HAVE_AHASH + case SW_TYPE_AHMAC: + case SW_TYPE_AHASH: + { + int ret; + + /* check we have room for the result */ + if (crp->crp_ilen - crd->crd_inject < sw->u.hmac.sw_mlen) { + dprintk("cryptosoft: EINVAL crp_ilen=%d, len=%d, inject=%d " + "digestsize=%d\n", crp->crp_ilen, crd->crd_skip + sg_len, + crd->crd_inject, sw->u.hmac.sw_mlen); + crp->crp_etype = EINVAL; + goto done; + } + + req->crypto_req = + ahash_request_alloc(__crypto_ahash_cast(sw->sw_tfm),GFP_ATOMIC); + if (!req->crypto_req) { + crp->crp_etype = ENOMEM; + dprintk("%s,%d: ENOMEM ahash_request_alloc", __FILE__, __LINE__); + goto done; + } + + ahash_request_set_callback(req->crypto_req, + CRYPTO_TFM_REQ_MAY_BACKLOG, swcr_process_callback, req); + + memset(req->result, 0, sizeof(req->result)); + + if (sw->sw_type & SW_TYPE_AHMAC) + crypto_ahash_setkey(__crypto_ahash_cast(sw->sw_tfm), + sw->u.hmac.sw_key, sw->u.hmac.sw_klen); + ahash_request_set_crypt(req->crypto_req, req->sg, req->result, sg_len); + ret = crypto_ahash_digest(req->crypto_req); + switch (ret) { + case -EINPROGRESS: + case -EBUSY: + return; + default: + case 0: + dprintk("hash OP %s %d\n", ret ? "failed" : "success", ret); + crp->crp_etype = ret; + goto done; + } + } break; +#endif /* HAVE_AHASH */ + +#ifdef HAVE_ABLKCIPHER + case SW_TYPE_ABLKCIPHER: { + int ret; + unsigned char *ivp = req->iv; + int ivsize = + crypto_ablkcipher_ivsize(__crypto_ablkcipher_cast(sw->sw_tfm)); + + if (sg_len < crypto_ablkcipher_blocksize( + __crypto_ablkcipher_cast(sw->sw_tfm))) { + crp->crp_etype = EINVAL; + dprintk("%s,%d: EINVAL len %d < %d\n", __FILE__, __LINE__, + sg_len, crypto_ablkcipher_blocksize( + __crypto_ablkcipher_cast(sw->sw_tfm))); + goto done; + } + + if (ivsize > sizeof(req->iv)) { + crp->crp_etype = EINVAL; + dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__); + goto done; + } + + req->crypto_req = ablkcipher_request_alloc( + __crypto_ablkcipher_cast(sw->sw_tfm), GFP_ATOMIC); + if (!req->crypto_req) { + crp->crp_etype = ENOMEM; + dprintk("%s,%d: ENOMEM ablkcipher_request_alloc", + __FILE__, __LINE__); + goto done; + } + + ablkcipher_request_set_callback(req->crypto_req, + CRYPTO_TFM_REQ_MAY_BACKLOG, swcr_process_callback, req); + + if (crd->crd_flags & CRD_F_KEY_EXPLICIT) { + int i, error; + + if (debug) { + dprintk("%s key:", __FUNCTION__); + for (i = 0; i < (crd->crd_klen + 7) / 8; i++) + dprintk("%s0x%x", (i % 8) ? " " : "\n ", + crd->crd_key[i] & 0xff); + dprintk("\n"); + } + /* OCF doesn't enforce keys */ + crypto_ablkcipher_set_flags(__crypto_ablkcipher_cast(sw->sw_tfm), + CRYPTO_TFM_REQ_WEAK_KEY); + error = crypto_ablkcipher_setkey( + __crypto_ablkcipher_cast(sw->sw_tfm), crd->crd_key, + (crd->crd_klen + 7) / 8); + if (error) { + dprintk("cryptosoft: setkey failed %d (crt_flags=0x%x)\n", + error, sw->sw_tfm->crt_flags); + crp->crp_etype = -error; + } + } + + if (crd->crd_flags & CRD_F_ENCRYPT) { /* encrypt */ + + if (crd->crd_flags & CRD_F_IV_EXPLICIT) + ivp = crd->crd_iv; + else + get_random_bytes(ivp, ivsize); + /* + * do we have to copy the IV back to the buffer ? + */ + if ((crd->crd_flags & CRD_F_IV_PRESENT) == 0) { + crypto_copyback(crp->crp_flags, crp->crp_buf, + crd->crd_inject, ivsize, (caddr_t)ivp); + } + ablkcipher_request_set_crypt(req->crypto_req, req->sg, req->sg, + sg_len, ivp); + ret = crypto_ablkcipher_encrypt(req->crypto_req); + + } else { /*decrypt */ + + if (crd->crd_flags & CRD_F_IV_EXPLICIT) + ivp = crd->crd_iv; + else + crypto_copydata(crp->crp_flags, crp->crp_buf, + crd->crd_inject, ivsize, (caddr_t)ivp); + ablkcipher_request_set_crypt(req->crypto_req, req->sg, req->sg, + sg_len, ivp); + ret = crypto_ablkcipher_decrypt(req->crypto_req); + } + + switch (ret) { + case -EINPROGRESS: + case -EBUSY: + return; + default: + case 0: + dprintk("crypto OP %s %d\n", ret ? "failed" : "success", ret); + crp->crp_etype = ret; + goto done; + } + } break; +#endif /* HAVE_ABLKCIPHER */ + + case SW_TYPE_BLKCIPHER: { + unsigned char iv[EALG_MAX_BLOCK_LEN]; + unsigned char *ivp = iv; + struct blkcipher_desc desc; + int ivsize = crypto_blkcipher_ivsize(crypto_blkcipher_cast(sw->sw_tfm)); + + if (sg_len < crypto_blkcipher_blocksize( + crypto_blkcipher_cast(sw->sw_tfm))) { + crp->crp_etype = EINVAL; + dprintk("%s,%d: EINVAL len %d < %d\n", __FILE__, __LINE__, + sg_len, crypto_blkcipher_blocksize( + crypto_blkcipher_cast(sw->sw_tfm))); + goto done; + } + + if (ivsize > sizeof(iv)) { + crp->crp_etype = EINVAL; + dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__); + goto done; + } + + if (crd->crd_flags & CRD_F_KEY_EXPLICIT) { + int i, error; + + if (debug) { + dprintk("%s key:", __FUNCTION__); + for (i = 0; i < (crd->crd_klen + 7) / 8; i++) + dprintk("%s0x%x", (i % 8) ? " " : "\n ", + crd->crd_key[i] & 0xff); + dprintk("\n"); + } + /* OCF doesn't enforce keys */ + crypto_blkcipher_set_flags(crypto_blkcipher_cast(sw->sw_tfm), + CRYPTO_TFM_REQ_WEAK_KEY); + error = crypto_blkcipher_setkey( + crypto_blkcipher_cast(sw->sw_tfm), crd->crd_key, + (crd->crd_klen + 7) / 8); + if (error) { + dprintk("cryptosoft: setkey failed %d (crt_flags=0x%x)\n", + error, sw->sw_tfm->crt_flags); + crp->crp_etype = -error; + } + } + + memset(&desc, 0, sizeof(desc)); + desc.tfm = crypto_blkcipher_cast(sw->sw_tfm); + + if (crd->crd_flags & CRD_F_ENCRYPT) { /* encrypt */ + + if (crd->crd_flags & CRD_F_IV_EXPLICIT) { + ivp = crd->crd_iv; + } else { + get_random_bytes(ivp, ivsize); + } + /* + * do we have to copy the IV back to the buffer ? + */ + if ((crd->crd_flags & CRD_F_IV_PRESENT) == 0) { + crypto_copyback(crp->crp_flags, crp->crp_buf, + crd->crd_inject, ivsize, (caddr_t)ivp); + } + desc.info = ivp; + crypto_blkcipher_encrypt_iv(&desc, req->sg, req->sg, sg_len); + + } else { /*decrypt */ + + if (crd->crd_flags & CRD_F_IV_EXPLICIT) { + ivp = crd->crd_iv; + } else { + crypto_copydata(crp->crp_flags, crp->crp_buf, + crd->crd_inject, ivsize, (caddr_t)ivp); + } + desc.info = ivp; + crypto_blkcipher_decrypt_iv(&desc, req->sg, req->sg, sg_len); + } + } break; + + case SW_TYPE_HMAC: + case SW_TYPE_HASH: + { + char result[HASH_MAX_LEN]; + struct hash_desc desc; + + /* check we have room for the result */ + if (crp->crp_ilen - crd->crd_inject < sw->u.hmac.sw_mlen) { + dprintk("cryptosoft: EINVAL crp_ilen=%d, len=%d, inject=%d " + "digestsize=%d\n", crp->crp_ilen, crd->crd_skip + sg_len, + crd->crd_inject, sw->u.hmac.sw_mlen); + crp->crp_etype = EINVAL; + goto done; + } + + memset(&desc, 0, sizeof(desc)); + desc.tfm = crypto_hash_cast(sw->sw_tfm); + + memset(result, 0, sizeof(result)); + + if (sw->sw_type & SW_TYPE_HMAC) { +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) + crypto_hmac(sw->sw_tfm, sw->u.hmac.sw_key, &sw->u.hmac.sw_klen, + req->sg, sg_num, result); +#else + crypto_hash_setkey(desc.tfm, sw->u.hmac.sw_key, + sw->u.hmac.sw_klen); + crypto_hash_digest(&desc, req->sg, sg_len, result); +#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) */ + + } else { /* SW_TYPE_HASH */ + crypto_hash_digest(&desc, req->sg, sg_len, result); + } + + crypto_copyback(crp->crp_flags, crp->crp_buf, + crd->crd_inject, sw->u.hmac.sw_mlen, result); + } + break; + + case SW_TYPE_COMP: { + void *ibuf = NULL; + void *obuf = sw->u.sw_comp_buf; + int ilen = sg_len, olen = CRYPTO_MAX_DATA_LEN; + int ret = 0; + + /* + * we need to use an additional copy if there is more than one + * input chunk since the kernel comp routines do not handle + * SG yet. Otherwise we just use the input buffer as is. + * Rather than allocate another buffer we just split the tmp + * buffer we already have. + * Perhaps we should just use zlib directly ? + */ + if (sg_num > 1) { + int blk; + + ibuf = obuf; + for (blk = 0; blk < sg_num; blk++) { + memcpy(obuf, sg_virt(&req->sg[blk]), + req->sg[blk].length); + obuf += req->sg[blk].length; + } + olen -= sg_len; + } else + ibuf = sg_virt(&req->sg[0]); + + if (crd->crd_flags & CRD_F_ENCRYPT) { /* compress */ + ret = crypto_comp_compress(crypto_comp_cast(sw->sw_tfm), + ibuf, ilen, obuf, &olen); + if (!ret && olen > crd->crd_len) { + dprintk("cryptosoft: ERANGE compress %d into %d\n", + crd->crd_len, olen); + if (swcr_fail_if_compression_grows) + ret = ERANGE; + } + } else { /* decompress */ + ret = crypto_comp_decompress(crypto_comp_cast(sw->sw_tfm), + ibuf, ilen, obuf, &olen); + if (!ret && (olen + crd->crd_inject) > crp->crp_olen) { + dprintk("cryptosoft: ETOOSMALL decompress %d into %d, " + "space for %d,at offset %d\n", + crd->crd_len, olen, crp->crp_olen, crd->crd_inject); + ret = ETOOSMALL; + } + } + if (ret) + dprintk("%s,%d: ret = %d\n", __FILE__, __LINE__, ret); + + /* + * on success copy result back, + * linux crpyto API returns -errno, we need to fix that + */ + crp->crp_etype = ret < 0 ? -ret : ret; + if (ret == 0) { + /* copy back the result and return it's size */ + crypto_copyback(crp->crp_flags, crp->crp_buf, + crd->crd_inject, olen, obuf); + crp->crp_olen = olen; + } + } break; + + default: + /* Unknown/unsupported algorithm */ + dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__); + crp->crp_etype = EINVAL; + goto done; + } + +done: + swcr_process_req_complete(req); +} + + +/* + * Process a crypto request. + */ +static int +swcr_process(device_t dev, struct cryptop *crp, int hint) +{ + struct swcr_req *req = NULL; + u_int32_t lid; + + dprintk("%s()\n", __FUNCTION__); + /* Sanity check */ + if (crp == NULL) { + dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__); + return EINVAL; + } + + crp->crp_etype = 0; + + if (crp->crp_desc == NULL || crp->crp_buf == NULL) { + dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__); + crp->crp_etype = EINVAL; + goto done; + } + + lid = crp->crp_sid & 0xffffffff; + if (lid >= swcr_sesnum || lid == 0 || swcr_sessions == NULL || + swcr_sessions[lid] == NULL) { + crp->crp_etype = ENOENT; + dprintk("%s,%d: ENOENT\n", __FILE__, __LINE__); + goto done; + } + + /* + * do some error checking outside of the loop for SKB and IOV processing + * this leaves us with valid skb or uiop pointers for later + */ + if (crp->crp_flags & CRYPTO_F_SKBUF) { + struct sk_buff *skb = (struct sk_buff *) crp->crp_buf; + if (skb_shinfo(skb)->nr_frags >= SCATTERLIST_MAX) { + printk("%s,%d: %d nr_frags > SCATTERLIST_MAX", __FILE__, __LINE__, + skb_shinfo(skb)->nr_frags); + goto done; + } + } else if (crp->crp_flags & CRYPTO_F_IOV) { + struct uio *uiop = (struct uio *) crp->crp_buf; + if (uiop->uio_iovcnt > SCATTERLIST_MAX) { + printk("%s,%d: %d uio_iovcnt > SCATTERLIST_MAX", __FILE__, __LINE__, + uiop->uio_iovcnt); + goto done; + } + } + + /* + * setup a new request ready for queuing + */ + req = kmem_cache_alloc(swcr_req_cache, SLAB_ATOMIC); + if (req == NULL) { + dprintk("%s,%d: ENOMEM\n", __FILE__, __LINE__); + crp->crp_etype = ENOMEM; + goto done; + } + memset(req, 0, sizeof(*req)); + + req->sw_head = swcr_sessions[lid]; + req->crp = crp; + req->crd = crp->crp_desc; + + swcr_process_req(req); + return 0; + +done: + crypto_done(crp); + if (req) + kmem_cache_free(swcr_req_cache, req); + return 0; +} + + +static int +cryptosoft_init(void) +{ + int i, sw_type, mode; + char *algo; + + dprintk("%s(%p)\n", __FUNCTION__, cryptosoft_init); + + swcr_req_cache = kmem_cache_create("cryptosoft_req", + sizeof(struct swcr_req), 0, SLAB_HWCACHE_ALIGN, NULL +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23) + , NULL +#endif + ); + if (!swcr_req_cache) { + printk("cryptosoft: failed to create request cache\n"); + return -ENOENT; + } + + softc_device_init(&swcr_softc, "cryptosoft", 0, swcr_methods); + + swcr_id = crypto_get_driverid(softc_get_device(&swcr_softc), + CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_SYNC); + if (swcr_id < 0) { + printk("cryptosoft: Software crypto device cannot initialize!"); + return -ENODEV; + } + +#define REGISTER(alg) \ + crypto_register(swcr_id, alg, 0,0) + + for (i = 0; i < sizeof(crypto_details)/sizeof(crypto_details[0]); i++) { + int found; + + algo = crypto_details[i].alg_name; + if (!algo || !*algo) { + dprintk("%s:Algorithm %d not supported\n", __FUNCTION__, i); + continue; + } + + mode = crypto_details[i].mode; + sw_type = crypto_details[i].sw_type; + + found = 0; + switch (sw_type & SW_TYPE_ALG_MASK) { + case SW_TYPE_CIPHER: + found = crypto_has_cipher(algo, 0, CRYPTO_ALG_ASYNC); + break; + case SW_TYPE_HMAC: + found = crypto_has_hash(algo, 0, swcr_no_ahash?CRYPTO_ALG_ASYNC:0); + break; + case SW_TYPE_HASH: + found = crypto_has_hash(algo, 0, swcr_no_ahash?CRYPTO_ALG_ASYNC:0); + break; + case SW_TYPE_COMP: + found = crypto_has_comp(algo, 0, CRYPTO_ALG_ASYNC); + break; + case SW_TYPE_BLKCIPHER: + found = crypto_has_blkcipher(algo, 0, CRYPTO_ALG_ASYNC); + if (!found && !swcr_no_ablk) + found = crypto_has_ablkcipher(algo, 0, 0); + break; + } + if (found) { + REGISTER(i); + } else { + dprintk("%s:Algorithm Type %d not supported (algorithm %d:'%s')\n", + __FUNCTION__, sw_type, i, algo); + } + } + return 0; +} + +static void +cryptosoft_exit(void) +{ + dprintk("%s()\n", __FUNCTION__); + crypto_unregister_all(swcr_id); + swcr_id = -1; + kmem_cache_destroy(swcr_req_cache); +} + +late_initcall(cryptosoft_init); +module_exit(cryptosoft_exit); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_AUTHOR("David McCullough <david_mccullough@mcafee.com>"); +MODULE_DESCRIPTION("Cryptosoft (OCF module for kernel crypto)"); |