Make additional parts of sys/geom/eli more usable in userspace

The upcoming GELI support in the loader reuses parts of this code
Some ifdefs are added, and some code is moved outside of existing ifdefs

The HMAC parts of GELI are broken out into their own file, to separate
them from the kernel crypto/openssl dependant parts that are replaced
in the boot code.

Passed the GELI regression suite (tools/regression/geom/eli)
 Files=20 Tests=14996
 Result: PASS

Reviewed by:	pjd, delphij
MFC after:	1 week
Sponsored by:	ScaleEngine Inc.
Differential Revision:	https://reviews.freebsd.org/D4699

6 files changed, 251 insertions, 184 deletions

diff --git a/sys/geom/eli/g_eli.c b/sys/geom/eli/g_eli.c
index 57adc40..a2b4e65 100644
--- a/sys/geom/eli/g_eli.c
+++ b/sys/geom/eli/g_eli.c
@@ -571,40 +571,6 @@ again:
 	}
 }
 
-/*
- * Here we generate IV. It is unique for every sector.
- */
-void
-g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv,
-    size_t size)
-{
-	uint8_t off[8];
-
-	if ((sc->sc_flags & G_ELI_FLAG_NATIVE_BYTE_ORDER) != 0)
-		bcopy(&offset, off, sizeof(off));
-	else
-		le64enc(off, (uint64_t)offset);
-
-	switch (sc->sc_ealgo) {
-	case CRYPTO_AES_XTS:
-		bcopy(off, iv, sizeof(off));
-		bzero(iv + sizeof(off), size - sizeof(off));
-		break;
-	default:
-	    {
-		u_char hash[SHA256_DIGEST_LENGTH];
-		SHA256_CTX ctx;
-
-		/* Copy precalculated SHA256 context for IV-Key. */
-		bcopy(&sc->sc_ivctx, &ctx, sizeof(ctx));
-		SHA256_Update(&ctx, off, sizeof(off));
-		SHA256_Final(hash, &ctx);
-		bcopy(hash, iv, MIN(sizeof(hash), size));
-		break;
-	    }
-	}
-}
-
 int
 g_eli_read_metadata(struct g_class *mp, struct g_provider *pp,
     struct g_eli_metadata *md)
@@ -751,44 +717,9 @@ g_eli_create(struct gctl_req *req, struct g_class *mp, struct g_provider *bpp,
 	else
 		gp->access = g_std_access;
 
-	sc->sc_version = md->md_version;
-	sc->sc_inflight = 0;
-	sc->sc_crypto = G_ELI_CRYPTO_UNKNOWN;
-	sc->sc_flags = md->md_flags;
-	/* Backward compatibility. */
-	if (md->md_version < G_ELI_VERSION_04)
-		sc->sc_flags |= G_ELI_FLAG_NATIVE_BYTE_ORDER;
-	if (md->md_version < G_ELI_VERSION_05)
-		sc->sc_flags |= G_ELI_FLAG_SINGLE_KEY;
-	if (md->md_version < G_ELI_VERSION_06 &&
-	    (sc->sc_flags & G_ELI_FLAG_AUTH) != 0) {
-		sc->sc_flags |= G_ELI_FLAG_FIRST_KEY;
-	}
-	if (md->md_version < G_ELI_VERSION_07)
-		sc->sc_flags |= G_ELI_FLAG_ENC_IVKEY;
-	sc->sc_ealgo = md->md_ealgo;
+	eli_metadata_softc(sc, md, bpp->sectorsize, bpp->mediasize);
 	sc->sc_nkey = nkey;
 
-	if (sc->sc_flags & G_ELI_FLAG_AUTH) {
-		sc->sc_akeylen = sizeof(sc->sc_akey) * 8;
-		sc->sc_aalgo = md->md_aalgo;
-		sc->sc_alen = g_eli_hashlen(sc->sc_aalgo);
-
-		sc->sc_data_per_sector = bpp->sectorsize - sc->sc_alen;
-		/*
-		 * Some hash functions (like SHA1 and RIPEMD160) generates hash
-		 * which length is not multiple of 128 bits, but we want data
-		 * length to be multiple of 128, so we can encrypt without
-		 * padding. The line below rounds down data length to multiple
-		 * of 128 bits.
-		 */
-		sc->sc_data_per_sector -= sc->sc_data_per_sector % 16;
-
-		sc->sc_bytes_per_sector =
-		    (md->md_sectorsize - 1) / sc->sc_data_per_sector + 1;
-		sc->sc_bytes_per_sector *= bpp->sectorsize;
-	}
-
 	gp->softc = sc;
 	sc->sc_geom = gp;
 
@@ -831,22 +762,10 @@ g_eli_create(struct gctl_req *req, struct g_class *mp, struct g_provider *bpp,
 		goto failed;
 	}
 
-	sc->sc_sectorsize = md->md_sectorsize;
-	sc->sc_mediasize = bpp->mediasize;
-	if (!(sc->sc_flags & G_ELI_FLAG_ONETIME))
-		sc->sc_mediasize -= bpp->sectorsize;
-	if (!(sc->sc_flags & G_ELI_FLAG_AUTH))
-		sc->sc_mediasize -= (sc->sc_mediasize % sc->sc_sectorsize);
-	else {
-		sc->sc_mediasize /= sc->sc_bytes_per_sector;
-		sc->sc_mediasize *= sc->sc_sectorsize;
-	}
-
 	/*
 	 * Remember the keys in our softc structure.
 	 */
 	g_eli_mkey_propagate(sc, mkey);
-	sc->sc_ekeylen = md->md_keylen;
 
 	LIST_INIT(&sc->sc_workers);
 
diff --git a/sys/geom/eli/g_eli.h b/sys/geom/eli/g_eli.h
index e4dbee6..3deb865 100644
--- a/sys/geom/eli/g_eli.h
+++ b/sys/geom/eli/g_eli.h
@@ -40,8 +40,6 @@
 #include <sys/libkern.h>
 #include <sys/lock.h>
 #include <sys/mutex.h>
-#include <sys/queue.h>
-#include <sys/tree.h>
 #include <geom/geom.h>
 #else
 #include <assert.h>
@@ -49,6 +47,8 @@
 #include <string.h>
 #include <strings.h>
 #endif
+#include <sys/queue.h>
+#include <sys/tree.h>
 #ifndef _OpenSSL_
 #include <sys/md5.h>
 #endif
@@ -132,15 +132,15 @@
 /* Switch data encryption key every 2^20 blocks. */
 #define	G_ELI_KEY_SHIFT		20
 
+#define	G_ELI_CRYPTO_UNKNOWN	0
+#define	G_ELI_CRYPTO_HW		1
+#define	G_ELI_CRYPTO_SW		2
+
 #ifdef _KERNEL
 extern int g_eli_debug;
 extern u_int g_eli_overwrites;
 extern u_int g_eli_batch;
 
-#define	G_ELI_CRYPTO_UNKNOWN	0
-#define	G_ELI_CRYPTO_HW		1
-#define	G_ELI_CRYPTO_SW		2
-
 #define	G_ELI_DEBUG(lvl, ...)	do {					\
 	if (g_eli_debug >= (lvl)) {					\
 		printf("GEOM_ELI");					\
@@ -173,6 +173,8 @@ struct g_eli_worker {
 	LIST_ENTRY(g_eli_worker) w_next;
 };
 
+#endif	/* _KERNEL */
+
 struct g_eli_softc {
 	struct g_geom	*sc_geom;
 	u_int		 sc_version;
@@ -200,15 +202,35 @@ struct g_eli_softc {
 	size_t		 sc_sectorsize;
 	u_int		 sc_bytes_per_sector;
 	u_int		 sc_data_per_sector;
+#ifndef _KERNEL
+	int		 sc_cpubind;
+#else /* _KERNEL */
 	boolean_t	 sc_cpubind;
 
 	/* Only for software cryptography. */
 	struct bio_queue_head sc_queue;
 	struct mtx	 sc_queue_mtx;
 	LIST_HEAD(, g_eli_worker) sc_workers;
+#endif /* _KERNEL */
 };
 #define	sc_name		 sc_geom->name
-#endif	/* _KERNEL */
+
+#define	G_ELI_KEY_MAGIC	0xe11341c
+
+struct g_eli_key {
+	/* Key value, must be first in the structure. */
+	uint8_t		gek_key[G_ELI_DATAKEYLEN];
+	/* Magic. */
+	int		gek_magic;
+	/* Key number. */
+	uint64_t	gek_keyno;
+	/* Reference counter. */
+	int		gek_count;
+	/* Keeps keys sorted by most recent use. */
+	TAILQ_ENTRY(g_eli_key) gek_next;
+	/* Keeps keys sorted by number. */
+	RB_ENTRY(g_eli_key) gek_link;
+};
 
 struct g_eli_metadata {
 	char		md_magic[16];	/* Magic value. */
@@ -569,6 +591,60 @@ g_eli_hashlen(u_int algo)
 	return (0);
 }
 
+static __inline void
+eli_metadata_softc(struct g_eli_softc *sc, const struct g_eli_metadata *md,
+    u_int sectorsize, off_t mediasize)
+{
+
+	sc->sc_version = md->md_version;
+	sc->sc_inflight = 0;
+	sc->sc_crypto = G_ELI_CRYPTO_UNKNOWN;
+	sc->sc_flags = md->md_flags;
+	/* Backward compatibility. */
+	if (md->md_version < G_ELI_VERSION_04)
+		sc->sc_flags |= G_ELI_FLAG_NATIVE_BYTE_ORDER;
+	if (md->md_version < G_ELI_VERSION_05)
+		sc->sc_flags |= G_ELI_FLAG_SINGLE_KEY;
+	if (md->md_version < G_ELI_VERSION_06 &&
+	    (sc->sc_flags & G_ELI_FLAG_AUTH) != 0) {
+		sc->sc_flags |= G_ELI_FLAG_FIRST_KEY;
+	}
+	if (md->md_version < G_ELI_VERSION_07)
+		sc->sc_flags |= G_ELI_FLAG_ENC_IVKEY;
+	sc->sc_ealgo = md->md_ealgo;
+
+	if (sc->sc_flags & G_ELI_FLAG_AUTH) {
+		sc->sc_akeylen = sizeof(sc->sc_akey) * 8;
+		sc->sc_aalgo = md->md_aalgo;
+		sc->sc_alen = g_eli_hashlen(sc->sc_aalgo);
+
+		sc->sc_data_per_sector = sectorsize - sc->sc_alen;
+		/*
+		 * Some hash functions (like SHA1 and RIPEMD160) generates hash
+		 * which length is not multiple of 128 bits, but we want data
+		 * length to be multiple of 128, so we can encrypt without
+		 * padding. The line below rounds down data length to multiple
+		 * of 128 bits.
+		 */
+		sc->sc_data_per_sector -= sc->sc_data_per_sector % 16;
+
+		sc->sc_bytes_per_sector =
+		    (md->md_sectorsize - 1) / sc->sc_data_per_sector + 1;
+		sc->sc_bytes_per_sector *= sectorsize;
+	}
+	sc->sc_sectorsize = md->md_sectorsize;
+	sc->sc_mediasize = mediasize;
+	if (!(sc->sc_flags & G_ELI_FLAG_ONETIME))
+		sc->sc_mediasize -= sectorsize;
+	if (!(sc->sc_flags & G_ELI_FLAG_AUTH))
+		sc->sc_mediasize -= (sc->sc_mediasize % sc->sc_sectorsize);
+	else {
+		sc->sc_mediasize /= sc->sc_bytes_per_sector;
+		sc->sc_mediasize *= sc->sc_sectorsize;
+	}
+	sc->sc_ekeylen = md->md_keylen;
+}
+
 #ifdef _KERNEL
 int g_eli_read_metadata(struct g_class *mp, struct g_provider *pp,
     struct g_eli_metadata *md);
@@ -583,8 +659,6 @@ void g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb);
 void g_eli_read_done(struct bio *bp);
 void g_eli_write_done(struct bio *bp);
 int g_eli_crypto_rerun(struct cryptop *crp);
-void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv,
-    size_t size);
 
 void g_eli_crypto_read(struct g_eli_softc *sc, struct bio *bp, boolean_t fromworker);
 void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp);
@@ -592,6 +666,8 @@ void g_eli_crypto_run(struct g_eli_worker *wr, struct bio *bp);
 void g_eli_auth_read(struct g_eli_softc *sc, struct bio *bp);
 void g_eli_auth_run(struct g_eli_worker *wr, struct bio *bp);
 #endif
+void g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv,
+    size_t size);
 
 void g_eli_mkey_hmac(unsigned char *mkey, const unsigned char *key);
 int g_eli_mkey_decrypt(const struct g_eli_metadata *md,
@@ -620,6 +696,8 @@ void g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize);
 void g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize,
     const uint8_t *data, size_t datasize, uint8_t *md, size_t mdsize);
 
+void g_eli_key_fill(struct g_eli_softc *sc, struct g_eli_key *key,
+    uint64_t keyno);
 #ifdef _KERNEL
 void g_eli_key_init(struct g_eli_softc *sc);
 void g_eli_key_destroy(struct g_eli_softc *sc);
diff --git a/sys/geom/eli/g_eli_crypto.c b/sys/geom/eli/g_eli_crypto.c
index 43eabf4..2d145fd 100644
--- a/sys/geom/eli/g_eli_crypto.c
+++ b/sys/geom/eli/g_eli_crypto.c
@@ -221,75 +221,3 @@ g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize,
 
 	return (g_eli_crypto_cipher(algo, 0, data, datasize, key, keysize));
 }
-
-void
-g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey,
-    size_t hkeylen)
-{
-	u_char k_ipad[128], key[128];
-	SHA512_CTX lctx;
-	u_int i;
-
-	bzero(key, sizeof(key));
-	if (hkeylen == 0)
-		; /* do nothing */
-	else if (hkeylen <= 128)
-		bcopy(hkey, key, hkeylen);
-	else {
-		/* If key is longer than 128 bytes reset it to key = SHA512(key). */
-		SHA512_Init(&lctx);
-		SHA512_Update(&lctx, hkey, hkeylen);
-		SHA512_Final(key, &lctx);
-	}
-
-	/* XOR key with ipad and opad values. */
-	for (i = 0; i < sizeof(key); i++) {
-		k_ipad[i] = key[i] ^ 0x36;
-		ctx->k_opad[i] = key[i] ^ 0x5c;
-	}
-	bzero(key, sizeof(key));
-	/* Perform inner SHA512. */
-	SHA512_Init(&ctx->shactx);
-	SHA512_Update(&ctx->shactx, k_ipad, sizeof(k_ipad));
-	bzero(k_ipad, sizeof(k_ipad));
-}
-
-void
-g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data,
-    size_t datasize)
-{
-
-	SHA512_Update(&ctx->shactx, data, datasize);
-}
-
-void
-g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize)
-{
-	u_char digest[SHA512_MDLEN];
-	SHA512_CTX lctx;
-
-	SHA512_Final(digest, &ctx->shactx);
-	/* Perform outer SHA512. */
-	SHA512_Init(&lctx);
-	SHA512_Update(&lctx, ctx->k_opad, sizeof(ctx->k_opad));
-	bzero(ctx, sizeof(*ctx));
-	SHA512_Update(&lctx, digest, sizeof(digest));
-	SHA512_Final(digest, &lctx);
-	bzero(&lctx, sizeof(lctx));
-	/* mdsize == 0 means "Give me the whole hash!" */
-	if (mdsize == 0)
-		mdsize = SHA512_MDLEN;
-	bcopy(digest, md, mdsize);
-	bzero(digest, sizeof(digest));
-}
-
-void
-g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, const uint8_t *data,
-    size_t datasize, uint8_t *md, size_t mdsize)
-{
-	struct hmac_ctx ctx;
-
-	g_eli_crypto_hmac_init(&ctx, hkey, hkeysize);
-	g_eli_crypto_hmac_update(&ctx, data, datasize);
-	g_eli_crypto_hmac_final(&ctx, md, mdsize);
-}
diff --git a/sys/geom/eli/g_eli_hmac.c b/sys/geom/eli/g_eli_hmac.c
new file mode 100644
index 0000000..36b76de
--- /dev/null
+++ b/sys/geom/eli/g_eli_hmac.c
@@ -0,0 +1,150 @@
+/*-
+ * Copyright (c) 2005-2010 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``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 AUTHORS OR CONTRIBUTORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#ifdef _KERNEL
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#else
+#include <stdint.h>
+#include <string.h>
+#include <strings.h>
+#include <errno.h>
+#include <assert.h>
+#include <openssl/evp.h>
+#define	_OpenSSL_
+#endif
+#include <geom/eli/g_eli.h>
+
+void
+g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey,
+    size_t hkeylen)
+{
+	u_char k_ipad[128], key[128];
+	SHA512_CTX lctx;
+	u_int i;
+
+	bzero(key, sizeof(key));
+	if (hkeylen == 0)
+		; /* do nothing */
+	else if (hkeylen <= 128)
+		bcopy(hkey, key, hkeylen);
+	else {
+		/* If key is longer than 128 bytes reset it to key = SHA512(key). */
+		SHA512_Init(&lctx);
+		SHA512_Update(&lctx, hkey, hkeylen);
+		SHA512_Final(key, &lctx);
+	}
+
+	/* XOR key with ipad and opad values. */
+	for (i = 0; i < sizeof(key); i++) {
+		k_ipad[i] = key[i] ^ 0x36;
+		ctx->k_opad[i] = key[i] ^ 0x5c;
+	}
+	bzero(key, sizeof(key));
+	/* Perform inner SHA512. */
+	SHA512_Init(&ctx->shactx);
+	SHA512_Update(&ctx->shactx, k_ipad, sizeof(k_ipad));
+	bzero(k_ipad, sizeof(k_ipad));
+}
+
+void
+g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data,
+    size_t datasize)
+{
+
+	SHA512_Update(&ctx->shactx, data, datasize);
+}
+
+void
+g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize)
+{
+	u_char digest[SHA512_MDLEN];
+	SHA512_CTX lctx;
+
+	SHA512_Final(digest, &ctx->shactx);
+	/* Perform outer SHA512. */
+	SHA512_Init(&lctx);
+	SHA512_Update(&lctx, ctx->k_opad, sizeof(ctx->k_opad));
+	bzero(ctx, sizeof(*ctx));
+	SHA512_Update(&lctx, digest, sizeof(digest));
+	SHA512_Final(digest, &lctx);
+	bzero(&lctx, sizeof(lctx));
+	/* mdsize == 0 means "Give me the whole hash!" */
+	if (mdsize == 0)
+		mdsize = SHA512_MDLEN;
+	bcopy(digest, md, mdsize);
+	bzero(digest, sizeof(digest));
+}
+
+void
+g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, const uint8_t *data,
+    size_t datasize, uint8_t *md, size_t mdsize)
+{
+	struct hmac_ctx ctx;
+
+	g_eli_crypto_hmac_init(&ctx, hkey, hkeysize);
+	g_eli_crypto_hmac_update(&ctx, data, datasize);
+	g_eli_crypto_hmac_final(&ctx, md, mdsize);
+}
+
+/*
+ * Here we generate IV. It is unique for every sector.
+ */
+void
+g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv,
+    size_t size)
+{
+	uint8_t off[8];
+
+	if ((sc->sc_flags & G_ELI_FLAG_NATIVE_BYTE_ORDER) != 0)
+		bcopy(&offset, off, sizeof(off));
+	else
+		le64enc(off, (uint64_t)offset);
+
+	switch (sc->sc_ealgo) {
+	case CRYPTO_AES_XTS:
+		bcopy(off, iv, sizeof(off));
+		bzero(iv + sizeof(off), size - sizeof(off));
+		break;
+	default:
+	    {
+		u_char hash[SHA256_DIGEST_LENGTH];
+		SHA256_CTX ctx;
+
+		/* Copy precalculated SHA256 context for IV-Key. */
+		bcopy(&sc->sc_ivctx, &ctx, sizeof(ctx));
+		SHA256_Update(&ctx, off, sizeof(off));
+		SHA256_Final(hash, &ctx);
+		bcopy(hash, iv, MIN(sizeof(hash), size));
+		break;
+	    }
+	}
+}
diff --git a/sys/geom/eli/g_eli_key_cache.c b/sys/geom/eli/g_eli_key_cache.c
index cb86716..0b909be 100644
--- a/sys/geom/eli/g_eli_key_cache.c
+++ b/sys/geom/eli/g_eli_key_cache.c
@@ -28,17 +28,20 @@
 __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
+#ifdef _KERNEL
 #include <sys/kernel.h>
 #include <sys/malloc.h>
-#include <sys/queue.h>
 #include <sys/sysctl.h>
 #include <sys/systm.h>
+#endif /* _KERNEL */
+#include <sys/queue.h>
 #include <sys/tree.h>
 
 #include <geom/geom.h>
 
 #include <geom/eli/g_eli.h>
 
+#ifdef _KERNEL
 MALLOC_DECLARE(M_ELI);
 
 SYSCTL_DECL(_kern_geom_eli);
@@ -56,22 +59,7 @@ static uint64_t g_eli_key_cache_misses;
 SYSCTL_UQUAD(_kern_geom_eli, OID_AUTO, key_cache_misses, CTLFLAG_RW,
     &g_eli_key_cache_misses, 0, "Key cache misses");
 
-#define	G_ELI_KEY_MAGIC	0xe11341c
-
-struct g_eli_key {
-	/* Key value, must be first in the structure. */
-	uint8_t		gek_key[G_ELI_DATAKEYLEN];
-	/* Magic. */
-	int		gek_magic;
-	/* Key number. */
-	uint64_t	gek_keyno;
-	/* Reference counter. */
-	int		gek_count;
-	/* Keeps keys sorted by most recent use. */
-	TAILQ_ENTRY(g_eli_key) gek_next;
-	/* Keeps keys sorted by number. */
-	RB_ENTRY(g_eli_key) gek_link;
-};
+#endif /* _KERNEL */
 
 static int
 g_eli_key_cmp(const struct g_eli_key *a, const struct g_eli_key *b)
@@ -84,10 +72,7 @@ g_eli_key_cmp(const struct g_eli_key *a, const struct g_eli_key *b)
 	return (0);
 }
 
-RB_PROTOTYPE(g_eli_key_tree, g_eli_key, gek_link, g_eli_key_cmp);
-RB_GENERATE(g_eli_key_tree, g_eli_key, gek_link, g_eli_key_cmp);
-
-static void
+void
 g_eli_key_fill(struct g_eli_softc *sc, struct g_eli_key *key, uint64_t keyno)
 {
 	const uint8_t *ekey;
@@ -110,6 +95,10 @@ g_eli_key_fill(struct g_eli_softc *sc, struct g_eli_key *key, uint64_t keyno)
 	key->gek_magic = G_ELI_KEY_MAGIC;
 }
 
+#ifdef _KERNEL
+RB_PROTOTYPE(g_eli_key_tree, g_eli_key, gek_link, g_eli_key_cmp);
+RB_GENERATE(g_eli_key_tree, g_eli_key, gek_link, g_eli_key_cmp);
+
 static struct g_eli_key *
 g_eli_key_allocate(struct g_eli_softc *sc, uint64_t keyno)
 {
@@ -350,3 +339,4 @@ g_eli_key_drop(struct g_eli_softc *sc, uint8_t *rawkey)
 	}
 	mtx_unlock(&sc->sc_ekeys_lock);
 }
+#endif /* _KERNEL */
diff --git a/sys/geom/eli/pkcs5v2.c b/sys/geom/eli/pkcs5v2.c
index 05677c1..6992801 100644
--- a/sys/geom/eli/pkcs5v2.c
+++ b/sys/geom/eli/pkcs5v2.c
@@ -83,6 +83,7 @@ pkcs5v2_genkey(uint8_t *key, unsigned keylen, const uint8_t *salt,
 }
 
 #ifndef _KERNEL
+#ifndef _STAND
 /*
  * Return the number of microseconds needed for 'interations' iterations.
  */
@@ -120,4 +121,5 @@ pkcs5v2_calculate(int usecs)
 	}
 	return (((intmax_t)iterations * (intmax_t)usecs) / v);
 }
+#endif	/* !_STAND */
 #endif	/* !_KERNEL */