--- /dev/null
+/*
+ * 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) 2004-2010 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.
+ * ---------------------------------------------------------------------------
+ */
+
+#ifndef 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/version.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
+
+/* 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 {
+ int sw_type;
+ int sw_alg;
+ struct crypto_tfm *sw_tfm;
+ 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 */
+
+ /* 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);
+
+/*
+ * 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;
+
+ /* 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) {
+ dprintk("%s %s cipher is async\n", __FUNCTION__, algo);
+ (*swd)->sw_type |= SW_TYPE_ASYNC;
+ } else {
+ dprintk("%s %s cipher is sync\n", __FUNCTION__, algo);
+ (*swd)->sw_tfm = crypto_blkcipher_tfm(
+ crypto_alloc_blkcipher(algo, 0, CRYPTO_ALG_ASYNC));
+ }
+ if (!(*swd)->sw_tfm) {
+ dprintk("cryptosoft: crypto_alloc_blkcipher failed(%s, 0x%x)\n",
+ algo,mode);
+ swcr_freesession(NULL, i);
+ return EINVAL;
+ }
+
+ 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:
+ crypto_free_comp(crypto_comp_cast(swd->sw_tfm));
+ 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;
+}
+
+#if defined(HAVE_ABLKCIPHER) || defined(HAVE_AHASH)
+/* older kernels had no async interface */
+
+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;
+ goto done;
+ }
+
+ switch (req->sw->sw_type & SW_TYPE_ALG_AMASK) {
+ 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;
+ case SW_TYPE_ABLKCIPHER:
+ ablkcipher_request_free(req->crypto_req);
+ 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);
+}
+#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;
+ }
+
+ 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_shinfo(skb)->frags[i].page,
+ 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;
+ }
+
+ 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_KERNEL);
+ 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;
+ ahash_request_free(req->crypto_req);
+ 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_KERNEL);
+ 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:
+ crypto_done(crp);
+ kmem_cache_free(swcr_req_cache, 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@securecomputing.com>");
+MODULE_DESCRIPTION("Cryptosoft (OCF module for kernel crypto)");
projects / 15.05 / openwrt.git / blobdiff