diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs
index 3ddeb42..9f2c87e 100644
--- a/crypto/Makefile.objs
+++ b/crypto/Makefile.objs
@@ -21,6 +21,7 @@ crypto-obj-y += afsplit.o
 crypto-obj-y += xts.o
 crypto-obj-y += block.o
 crypto-obj-y += block-qcow.o
+crypto-obj-y += block-luks.o
 
 # Let the userspace emulators avoid linking gnutls/etc
 crypto-aes-obj-y = aes.o
diff --git a/crypto/block-luks.c b/crypto/block-luks.c
new file mode 100644
index 0000000..58c1b94
--- /dev/null
+++ b/crypto/block-luks.c
@@ -0,0 +1,1328 @@
+/*
+ * QEMU Crypto block device encryption LUKS format
+ *
+ * Copyright (c) 2015-2016 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "qemu/osdep.h"
+
+#include "crypto/block-luks.h"
+
+#include "crypto/hash.h"
+#include "crypto/afsplit.h"
+#include "crypto/pbkdf.h"
+#include "crypto/secret.h"
+#include "crypto/random.h"
+
+#ifdef CONFIG_UUID
+#include <uuid/uuid.h>
+#endif
+
+#include "qemu/coroutine.h"
+
+/*
+ * Reference for the LUKS format implemented here is
+ *
+ *   docs/on-disk-format.pdf
+ *
+ * in 'cryptsetup' package source code
+ *
+ * This file implements the 1.2.1 specification, dated
+ * Oct 16, 2011.
+ */
+
+typedef struct QCryptoBlockLUKS QCryptoBlockLUKS;
+typedef struct QCryptoBlockLUKSHeader QCryptoBlockLUKSHeader;
+typedef struct QCryptoBlockLUKSKeySlot QCryptoBlockLUKSKeySlot;
+
+
+/* The following constants are all defined by the LUKS spec */
+#define QCRYPTO_BLOCK_LUKS_VERSION 1
+
+#define QCRYPTO_BLOCK_LUKS_MAGIC_LEN 6
+#define QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN 32
+#define QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN 32
+#define QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN 32
+#define QCRYPTO_BLOCK_LUKS_DIGEST_LEN 20
+#define QCRYPTO_BLOCK_LUKS_SALT_LEN 32
+#define QCRYPTO_BLOCK_LUKS_UUID_LEN 40
+#define QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS 8
+#define QCRYPTO_BLOCK_LUKS_STRIPES 4000
+#define QCRYPTO_BLOCK_LUKS_MIN_SLOT_KEY_ITERS 1000
+#define QCRYPTO_BLOCK_LUKS_MIN_MASTER_KEY_ITERS 1000
+#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET 4096
+
+#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED 0x0000DEAD
+#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED 0x00AC71F3
+
+#define QCRYPTO_BLOCK_LUKS_SECTOR_SIZE 512LL
+
+static const char qcrypto_block_luks_magic[QCRYPTO_BLOCK_LUKS_MAGIC_LEN] = {
+    'L', 'U', 'K', 'S', 0xBA, 0xBE
+};
+
+typedef struct QCryptoBlockLUKSNameMap QCryptoBlockLUKSNameMap;
+struct QCryptoBlockLUKSNameMap {
+    const char *name;
+    int id;
+};
+
+typedef struct QCryptoBlockLUKSCipherSizeMap QCryptoBlockLUKSCipherSizeMap;
+struct QCryptoBlockLUKSCipherSizeMap {
+    uint32_t key_bytes;
+    int id;
+};
+typedef struct QCryptoBlockLUKSCipherNameMap QCryptoBlockLUKSCipherNameMap;
+struct QCryptoBlockLUKSCipherNameMap {
+    const char *name;
+    const QCryptoBlockLUKSCipherSizeMap *sizes;
+};
+
+
+static const QCryptoBlockLUKSCipherSizeMap
+qcrypto_block_luks_cipher_size_map_aes[] = {
+    { 16, QCRYPTO_CIPHER_ALG_AES_128 },
+    { 24, QCRYPTO_CIPHER_ALG_AES_192 },
+    { 32, QCRYPTO_CIPHER_ALG_AES_256 },
+    { 0, 0 },
+};
+
+static const QCryptoBlockLUKSCipherSizeMap
+qcrypto_block_luks_cipher_size_map_cast5[] = {
+    { 16, QCRYPTO_CIPHER_ALG_CAST5_128 },
+    { 0, 0 },
+};
+
+static const QCryptoBlockLUKSCipherSizeMap
+qcrypto_block_luks_cipher_size_map_serpent[] = {
+    { 16, QCRYPTO_CIPHER_ALG_SERPENT_128 },
+    { 24, QCRYPTO_CIPHER_ALG_SERPENT_192 },
+    { 32, QCRYPTO_CIPHER_ALG_SERPENT_256 },
+    { 0, 0 },
+};
+
+static const QCryptoBlockLUKSCipherSizeMap
+qcrypto_block_luks_cipher_size_map_twofish[] = {
+    { 16, QCRYPTO_CIPHER_ALG_TWOFISH_128 },
+    { 24, QCRYPTO_CIPHER_ALG_TWOFISH_192 },
+    { 32, QCRYPTO_CIPHER_ALG_TWOFISH_256 },
+    { 0, 0 },
+};
+
+static const QCryptoBlockLUKSCipherNameMap
+qcrypto_block_luks_cipher_name_map[] = {
+    { "aes", qcrypto_block_luks_cipher_size_map_aes },
+    { "cast5", qcrypto_block_luks_cipher_size_map_cast5 },
+    { "serpent", qcrypto_block_luks_cipher_size_map_serpent },
+    { "twofish", qcrypto_block_luks_cipher_size_map_twofish },
+};
+
+
+/*
+ * This struct is written to disk in big-endian format,
+ * but operated upon in native-endian format.
+ */
+struct QCryptoBlockLUKSKeySlot {
+    /* state of keyslot, enabled/disable */
+    uint32_t active;
+    /* iterations for PBKDF2 */
+    uint32_t iterations;
+    /* salt for PBKDF2 */
+    uint8_t salt[QCRYPTO_BLOCK_LUKS_SALT_LEN];
+    /* start sector of key material */
+    uint32_t key_offset;
+    /* number of anti-forensic stripes */
+    uint32_t stripes;
+} QEMU_PACKED;
+
+QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSKeySlot) != 48);
+
+
+/*
+ * This struct is written to disk in big-endian format,
+ * but operated upon in native-endian format.
+ */
+struct QCryptoBlockLUKSHeader {
+    /* 'L', 'U', 'K', 'S', '0xBA', '0xBE' */
+    char magic[QCRYPTO_BLOCK_LUKS_MAGIC_LEN];
+
+    /* LUKS version, currently 1 */
+    uint16_t version;
+
+    /* cipher name specification (aes, etc) */
+    char cipher_name[QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN];
+
+    /* cipher mode specification (cbc-plain, xts-essiv:sha256, etc) */
+    char cipher_mode[QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN];
+
+    /* hash specification (sha256, etc) */
+    char hash_spec[QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN];
+
+    /* start offset of the volume data (in 512 byte sectors) */
+    uint32_t payload_offset;
+
+    /* Number of key bytes */
+    uint32_t key_bytes;
+
+    /* master key checksum after PBKDF2 */
+    uint8_t master_key_digest[QCRYPTO_BLOCK_LUKS_DIGEST_LEN];
+
+    /* salt for master key PBKDF2 */
+    uint8_t master_key_salt[QCRYPTO_BLOCK_LUKS_SALT_LEN];
+
+    /* iterations for master key PBKDF2 */
+    uint32_t master_key_iterations;
+
+    /* UUID of the partition in standard ASCII representation */
+    uint8_t uuid[QCRYPTO_BLOCK_LUKS_UUID_LEN];
+
+    /* key slots */
+    QCryptoBlockLUKSKeySlot key_slots[QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS];
+} QEMU_PACKED;
+
+QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSHeader) != 592);
+
+
+struct QCryptoBlockLUKS {
+    QCryptoBlockLUKSHeader header;
+};
+
+
+static int qcrypto_block_luks_cipher_name_lookup(const char *name,
+                                                 QCryptoCipherMode mode,
+                                                 uint32_t key_bytes,
+                                                 Error **errp)
+{
+    const QCryptoBlockLUKSCipherNameMap *map =
+        qcrypto_block_luks_cipher_name_map;
+    size_t maplen = G_N_ELEMENTS(qcrypto_block_luks_cipher_name_map);
+    size_t i, j;
+
+    if (mode == QCRYPTO_CIPHER_MODE_XTS) {
+        key_bytes /= 2;
+    }
+
+    for (i = 0; i < maplen; i++) {
+        if (!g_str_equal(map[i].name, name)) {
+            continue;
+        }
+        for (j = 0; j < map[i].sizes[j].key_bytes; j++) {
+            if (map[i].sizes[j].key_bytes == key_bytes) {
+                return map[i].sizes[j].id;
+            }
+        }
+    }
+
+    error_setg(errp, "Algorithm %s with key size %d bytes not supported",
+               name, key_bytes);
+    return 0;
+}
+
+static const char *
+qcrypto_block_luks_cipher_alg_lookup(QCryptoCipherAlgorithm alg,
+                                     Error **errp)
+{
+    const QCryptoBlockLUKSCipherNameMap *map =
+        qcrypto_block_luks_cipher_name_map;
+    size_t maplen = G_N_ELEMENTS(qcrypto_block_luks_cipher_name_map);
+    size_t i, j;
+    for (i = 0; i < maplen; i++) {
+        for (j = 0; j < map[i].sizes[j].key_bytes; j++) {
+            if (map[i].sizes[j].id == alg) {
+                return map[i].name;
+            }
+        }
+    }
+
+    error_setg(errp, "Algorithm '%s' not supported",
+               QCryptoCipherAlgorithm_lookup[alg]);
+    return NULL;
+}
+
+/* XXX replace with qapi_enum_parse() in future, when we can
+ * make that function emit a more friendly error message */
+static int qcrypto_block_luks_name_lookup(const char *name,
+                                          const char *const *map,
+                                          size_t maplen,
+                                          const char *type,
+                                          Error **errp)
+{
+    size_t i;
+    for (i = 0; i < maplen; i++) {
+        if (g_str_equal(map[i], name)) {
+            return i;
+        }
+    }
+
+    error_setg(errp, "%s %s not supported", type, name);
+    return 0;
+}
+
+#define qcrypto_block_luks_cipher_mode_lookup(name, errp)               \
+    qcrypto_block_luks_name_lookup(name,                                \
+                                   QCryptoCipherMode_lookup,            \
+                                   QCRYPTO_CIPHER_MODE__MAX,            \
+                                   "Cipher mode",                       \
+                                   errp)
+
+#define qcrypto_block_luks_hash_name_lookup(name, errp)                 \
+    qcrypto_block_luks_name_lookup(name,                                \
+                                   QCryptoHashAlgorithm_lookup,         \
+                                   QCRYPTO_HASH_ALG__MAX,               \
+                                   "Hash algorithm",                    \
+                                   errp)
+
+#define qcrypto_block_luks_ivgen_name_lookup(name, errp)                \
+    qcrypto_block_luks_name_lookup(name,                                \
+                                   QCryptoIVGenAlgorithm_lookup,        \
+                                   QCRYPTO_IVGEN_ALG__MAX,              \
+                                   "IV generator",                      \
+                                   errp)
+
+
+static bool
+qcrypto_block_luks_has_format(const uint8_t *buf,
+                              size_t buf_size)
+{
+    const QCryptoBlockLUKSHeader *luks_header = (const void *)buf;
+
+    if (buf_size >= offsetof(QCryptoBlockLUKSHeader, cipher_name) &&
+        memcmp(luks_header->magic, qcrypto_block_luks_magic,
+               QCRYPTO_BLOCK_LUKS_MAGIC_LEN) == 0 &&
+        be16_to_cpu(luks_header->version) == QCRYPTO_BLOCK_LUKS_VERSION) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+
+/**
+ * Deal with a quirk of dm-crypt usage of ESSIV.
+ *
+ * When calculating ESSIV IVs, the cipher length used by ESSIV
+ * may be different from the cipher length used for the block
+ * encryption, becauses dm-crypt uses the hash digest length
+ * as the key size. ie, if you have AES 128 as the block cipher
+ * and SHA 256 as ESSIV hash, then ESSIV will use AES 256 as
+ * the cipher since that gets a key length matching the digest
+ * size, not AES 128 with truncated digest as might be imagined
+ */
+static QCryptoCipherAlgorithm
+qcrypto_block_luks_essiv_cipher(QCryptoCipherAlgorithm cipher,
+                                QCryptoHashAlgorithm hash,
+                                Error **errp)
+{
+    size_t digestlen = qcrypto_hash_digest_len(hash);
+    size_t keylen = qcrypto_cipher_get_key_len(cipher);
+    if (digestlen == keylen) {
+        return cipher;
+    }
+
+    switch (cipher) {
+    case QCRYPTO_CIPHER_ALG_AES_128:
+    case QCRYPTO_CIPHER_ALG_AES_192:
+    case QCRYPTO_CIPHER_ALG_AES_256:
+        if (digestlen == qcrypto_cipher_get_key_len(
+                QCRYPTO_CIPHER_ALG_AES_128)) {
+            return QCRYPTO_CIPHER_ALG_AES_128;
+        } else if (digestlen == qcrypto_cipher_get_key_len(
+                       QCRYPTO_CIPHER_ALG_AES_192)) {
+            return QCRYPTO_CIPHER_ALG_AES_192;
+        } else if (digestlen == qcrypto_cipher_get_key_len(
+                       QCRYPTO_CIPHER_ALG_AES_256)) {
+            return QCRYPTO_CIPHER_ALG_AES_256;
+        } else {
+            error_setg(errp, "No AES cipher with key size %zu available",
+                       digestlen);
+            return 0;
+        }
+        break;
+    case QCRYPTO_CIPHER_ALG_SERPENT_128:
+    case QCRYPTO_CIPHER_ALG_SERPENT_192:
+    case QCRYPTO_CIPHER_ALG_SERPENT_256:
+        if (digestlen == qcrypto_cipher_get_key_len(
+                QCRYPTO_CIPHER_ALG_SERPENT_128)) {
+            return QCRYPTO_CIPHER_ALG_SERPENT_128;
+        } else if (digestlen == qcrypto_cipher_get_key_len(
+                       QCRYPTO_CIPHER_ALG_SERPENT_192)) {
+            return QCRYPTO_CIPHER_ALG_SERPENT_192;
+        } else if (digestlen == qcrypto_cipher_get_key_len(
+                       QCRYPTO_CIPHER_ALG_SERPENT_256)) {
+            return QCRYPTO_CIPHER_ALG_SERPENT_256;
+        } else {
+            error_setg(errp, "No Serpent cipher with key size %zu available",
+                       digestlen);
+            return 0;
+        }
+        break;
+    case QCRYPTO_CIPHER_ALG_TWOFISH_128:
+    case QCRYPTO_CIPHER_ALG_TWOFISH_192:
+    case QCRYPTO_CIPHER_ALG_TWOFISH_256:
+        if (digestlen == qcrypto_cipher_get_key_len(
+                QCRYPTO_CIPHER_ALG_TWOFISH_128)) {
+            return QCRYPTO_CIPHER_ALG_TWOFISH_128;
+        } else if (digestlen == qcrypto_cipher_get_key_len(
+                       QCRYPTO_CIPHER_ALG_TWOFISH_192)) {
+            return QCRYPTO_CIPHER_ALG_TWOFISH_192;
+        } else if (digestlen == qcrypto_cipher_get_key_len(
+                       QCRYPTO_CIPHER_ALG_TWOFISH_256)) {
+            return QCRYPTO_CIPHER_ALG_TWOFISH_256;
+        } else {
+            error_setg(errp, "No Twofish cipher with key size %zu available",
+                       digestlen);
+            return 0;
+        }
+        break;
+    default:
+        error_setg(errp, "Cipher %s not supported with essiv",
+                   QCryptoCipherAlgorithm_lookup[cipher]);
+        return 0;
+    }
+}
+
+/*
+ * Given a key slot, and user password, this will attempt to unlock
+ * the master encryption key from the key slot.
+ *
+ * Returns:
+ *    0 if the key slot is disabled, or key could not be decrypted
+ *      with the provided password
+ *    1 if the key slot is enabled, and key decrypted successfully
+ *      with the provided password
+ *   -1 if a fatal error occurred loading the key
+ */
+static int
+qcrypto_block_luks_load_key(QCryptoBlock *block,
+                            QCryptoBlockLUKSKeySlot *slot,
+                            const char *password,
+                            QCryptoCipherAlgorithm cipheralg,
+                            QCryptoCipherMode ciphermode,
+                            QCryptoHashAlgorithm hash,
+                            QCryptoIVGenAlgorithm ivalg,
+                            QCryptoCipherAlgorithm ivcipheralg,
+                            QCryptoHashAlgorithm ivhash,
+                            uint8_t *masterkey,
+                            size_t masterkeylen,
+                            QCryptoBlockReadFunc readfunc,
+                            void *opaque,
+                            Error **errp)
+{
+    QCryptoBlockLUKS *luks = block->opaque;
+    uint8_t *splitkey;
+    size_t splitkeylen;
+    uint8_t *possiblekey;
+    int ret = -1;
+    ssize_t rv;
+    QCryptoCipher *cipher = NULL;
+    uint8_t keydigest[QCRYPTO_BLOCK_LUKS_DIGEST_LEN];
+    QCryptoIVGen *ivgen = NULL;
+    size_t niv;
+
+    if (slot->active != QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED) {
+        return 0;
+    }
+
+    splitkeylen = masterkeylen * slot->stripes;
+    splitkey = g_new0(uint8_t, splitkeylen);
+    possiblekey = g_new0(uint8_t, masterkeylen);
+
+    /*
+     * The user password is used to generate a (possible)
+     * decryption key. This may or may not successfully
+     * decrypt the master key - we just blindly assume
+     * the key is correct and validate the results of
+     * decryption later.
+     */
+    if (qcrypto_pbkdf2(hash,
+                       (const uint8_t *)password, strlen(password),
+                       slot->salt, QCRYPTO_BLOCK_LUKS_SALT_LEN,
+                       slot->iterations,
+                       possiblekey, masterkeylen,
+                       errp) < 0) {
+        goto cleanup;
+    }
+
+    /*
+     * We need to read the master key material from the
+     * LUKS key material header. What we're reading is
+     * not the raw master key, but rather the data after
+     * it has been passed through AFSplit and the result
+     * then encrypted.
+     */
+    rv = readfunc(block,
+                  slot->key_offset * QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
+                  splitkey, splitkeylen,
+                  errp,
+                  opaque);
+    if (rv < 0) {
+        goto cleanup;
+    }
+
+
+    /* Setup the cipher/ivgen that we'll use to try to decrypt
+     * the split master key material */
+    cipher = qcrypto_cipher_new(cipheralg, ciphermode,
+                                possiblekey, masterkeylen,
+                                errp);
+    if (!cipher) {
+        goto cleanup;
+    }
+
+    niv = qcrypto_cipher_get_iv_len(cipheralg,
+                                    ciphermode);
+    ivgen = qcrypto_ivgen_new(ivalg,
+                              ivcipheralg,
+                              ivhash,
+                              possiblekey, masterkeylen,
+                              errp);
+    if (!ivgen) {
+        goto cleanup;
+    }
+
+
+    /*
+     * The master key needs to be decrypted in the same
+     * way that the block device payload will be decrypted
+     * later. In particular we'll be using the IV generator
+     * to reset the encryption cipher every time the master
+     * key crosses a sector boundary.
+     */
+    if (qcrypto_block_decrypt_helper(cipher,
+                                     niv,
+                                     ivgen,
+                                     QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
+                                     0,
+                                     splitkey,
+                                     splitkeylen,
+                                     errp) < 0) {
+        goto cleanup;
+    }
+
+    /*
+     * Now we've decrypted the split master key, join
+     * it back together to get the actual master key.
+     */
+    if (qcrypto_afsplit_decode(hash,
+                               masterkeylen,
+                               slot->stripes,
+                               splitkey,
+                               masterkey,
+                               errp) < 0) {
+        goto cleanup;
+    }
+
+
+    /*
+     * We still don't know that the masterkey we got is valid,
+     * because we just blindly assumed the user's password
+     * was correct. This is where we now verify it. We are
+     * creating a hash of the master key using PBKDF and
+     * then comparing that to the hash stored in the key slot
+     * header
+     */
+    if (qcrypto_pbkdf2(hash,
+                       masterkey, masterkeylen,
+                       luks->header.master_key_salt,
+                       QCRYPTO_BLOCK_LUKS_SALT_LEN,
+                       luks->header.master_key_iterations,
+                       keydigest, G_N_ELEMENTS(keydigest),
+                       errp) < 0) {
+        goto cleanup;
+    }
+
+    if (memcmp(keydigest, luks->header.master_key_digest,
+               QCRYPTO_BLOCK_LUKS_DIGEST_LEN) == 0) {
+        /* Success, we got the right master key */
+        ret = 1;
+        goto cleanup;
+    }
+
+    /* Fail, user's password was not valid for this key slot,
+     * tell caller to try another slot */
+    ret = 0;
+
+ cleanup:
+    qcrypto_ivgen_free(ivgen);
+    qcrypto_cipher_free(cipher);
+    g_free(splitkey);
+    g_free(possiblekey);
+    return ret;
+}
+
+
+/*
+ * Given a user password, this will iterate over all key
+ * slots and try to unlock each active key slot using the
+ * password until it successfully obtains a master key.
+ *
+ * Returns 0 if a key was loaded, -1 if no keys could be loaded
+ */
+static int
+qcrypto_block_luks_find_key(QCryptoBlock *block,
+                            const char *password,
+                            QCryptoCipherAlgorithm cipheralg,
+                            QCryptoCipherMode ciphermode,
+                            QCryptoHashAlgorithm hash,
+                            QCryptoIVGenAlgorithm ivalg,
+                            QCryptoCipherAlgorithm ivcipheralg,
+                            QCryptoHashAlgorithm ivhash,
+                            uint8_t **masterkey,
+                            size_t *masterkeylen,
+                            QCryptoBlockReadFunc readfunc,
+                            void *opaque,
+                            Error **errp)
+{
+    QCryptoBlockLUKS *luks = block->opaque;
+    size_t i;
+    int rv;
+
+    *masterkey = g_new0(uint8_t, luks->header.key_bytes);
+    *masterkeylen = luks->header.key_bytes;
+
+    for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) {
+        rv = qcrypto_block_luks_load_key(block,
+                                         &luks->header.key_slots[i],
+                                         password,
+                                         cipheralg,
+                                         ciphermode,
+                                         hash,
+                                         ivalg,
+                                         ivcipheralg,
+                                         ivhash,
+                                         *masterkey,
+                                         *masterkeylen,
+                                         readfunc,
+                                         opaque,
+                                         errp);
+        if (rv < 0) {
+            goto error;
+        }
+        if (rv == 1) {
+            return 0;
+        }
+    }
+
+    error_setg(errp, "Invalid password, cannot unlock any keyslot");
+
+ error:
+    g_free(*masterkey);
+    *masterkey = NULL;
+    *masterkeylen = 0;
+    return -1;
+}
+
+
+static int
+qcrypto_block_luks_open(QCryptoBlock *block,
+                        QCryptoBlockOpenOptions *options,
+                        QCryptoBlockReadFunc readfunc,
+                        void *opaque,
+                        unsigned int flags,
+                        Error **errp)
+{
+    QCryptoBlockLUKS *luks;
+    Error *local_err = NULL;
+    int ret = 0;
+    size_t i;
+    ssize_t rv;
+    uint8_t *masterkey = NULL;
+    size_t masterkeylen;
+    char *ivgen_name, *ivhash_name;
+    QCryptoCipherMode ciphermode;
+    QCryptoCipherAlgorithm cipheralg;
+    QCryptoIVGenAlgorithm ivalg;
+    QCryptoCipherAlgorithm ivcipheralg;
+    QCryptoHashAlgorithm hash;
+    QCryptoHashAlgorithm ivhash;
+    char *password = NULL;
+
+    if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) {
+        if (!options->u.luks.key_secret) {
+            error_setg(errp, "Parameter 'key-secret' is required for cipher");
+            return -1;
+        }
+        password = qcrypto_secret_lookup_as_utf8(
+            options->u.luks.key_secret, errp);
+        if (!password) {
+            return -1;
+        }
+    }
+
+    luks = g_new0(QCryptoBlockLUKS, 1);
+    block->opaque = luks;
+
+    /* Read the entire LUKS header, minus the key material from
+     * the underlying device */
+    rv = readfunc(block, 0,
+                  (uint8_t *)&luks->header,
+                  sizeof(luks->header),
+                  errp,
+                  opaque);
+    if (rv < 0) {
+        ret = rv;
+        goto fail;
+    }
+
+    /* The header is always stored in big-endian format, so
+     * convert everything to native */
+    be16_to_cpus(&luks->header.version);
+    be32_to_cpus(&luks->header.payload_offset);
+    be32_to_cpus(&luks->header.key_bytes);
+    be32_to_cpus(&luks->header.master_key_iterations);
+
+    for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) {
+        be32_to_cpus(&luks->header.key_slots[i].active);
+        be32_to_cpus(&luks->header.key_slots[i].iterations);
+        be32_to_cpus(&luks->header.key_slots[i].key_offset);
+        be32_to_cpus(&luks->header.key_slots[i].stripes);
+    }
+
+    if (memcmp(luks->header.magic, qcrypto_block_luks_magic,
+               QCRYPTO_BLOCK_LUKS_MAGIC_LEN) != 0) {
+        error_setg(errp, "Volume is not in LUKS format");
+        ret = -EINVAL;
+        goto fail;
+    }
+    if (luks->header.version != QCRYPTO_BLOCK_LUKS_VERSION) {
+        error_setg(errp, "LUKS version %" PRIu32 " is not supported",
+                   luks->header.version);
+        ret = -ENOTSUP;
+        goto fail;
+    }
+
+    /*
+     * The cipher_mode header contains a string that we have
+     * to further parse, of the format
+     *
+     *    <cipher-mode>-<iv-generator>[:<iv-hash>]
+     *
+     * eg  cbc-essiv:sha256, cbc-plain64
+     */
+    ivgen_name = strchr(luks->header.cipher_mode, '-');
+    if (!ivgen_name) {
+        ret = -EINVAL;
+        error_setg(errp, "Unexpected cipher mode string format %s",
+                   luks->header.cipher_mode);
+        goto fail;
+    }
+    *ivgen_name = '\0';
+    ivgen_name++;
+
+    ivhash_name = strchr(ivgen_name, ':');
+    if (!ivhash_name) {
+        ivhash = 0;
+    } else {
+        *ivhash_name = '\0';
+        ivhash_name++;
+
+        ivhash = qcrypto_block_luks_hash_name_lookup(ivhash_name,
+                                                     &local_err);
+        if (local_err) {
+            ret = -ENOTSUP;
+            error_propagate(errp, local_err);
+            goto fail;
+        }
+    }
+
+    ciphermode = qcrypto_block_luks_cipher_mode_lookup(luks->header.cipher_mode,
+                                                       &local_err);
+    if (local_err) {
+        ret = -ENOTSUP;
+        error_propagate(errp, local_err);
+        goto fail;
+    }
+
+    cipheralg = qcrypto_block_luks_cipher_name_lookup(luks->header.cipher_name,
+                                                      ciphermode,
+                                                      luks->header.key_bytes,
+                                                      &local_err);
+    if (local_err) {
+        ret = -ENOTSUP;
+        error_propagate(errp, local_err);
+        goto fail;
+    }
+
+    hash = qcrypto_block_luks_hash_name_lookup(luks->header.hash_spec,
+                                               &local_err);
+    if (local_err) {
+        ret = -ENOTSUP;
+        error_propagate(errp, local_err);
+        goto fail;
+    }
+
+    ivalg = qcrypto_block_luks_ivgen_name_lookup(ivgen_name,
+                                                 &local_err);
+    if (local_err) {
+        ret = -ENOTSUP;
+        error_propagate(errp, local_err);
+        goto fail;
+    }
+
+    if (ivalg == QCRYPTO_IVGEN_ALG_ESSIV) {
+        ivcipheralg = qcrypto_block_luks_essiv_cipher(cipheralg,
+                                                      ivhash,
+                                                      &local_err);
+        if (local_err) {
+            ret = -ENOTSUP;
+            error_propagate(errp, local_err);
+            goto fail;
+        }
+    } else {
+        ivcipheralg = cipheralg;
+    }
+
+    if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) {
+        /* Try to find which key slot our password is valid for
+         * and unlock the master key from that slot.
+         */
+        if (qcrypto_block_luks_find_key(block,
+                                        password,
+                                        cipheralg, ciphermode,
+                                        hash,
+                                        ivalg,
+                                        ivcipheralg,
+                                        ivhash,
+                                        &masterkey, &masterkeylen,
+                                        readfunc, opaque,
+                                        errp) < 0) {
+            ret = -EACCES;
+            goto fail;
+        }
+
+        /* We have a valid master key now, so can setup the
+         * block device payload decryption objects
+         */
+        block->kdfhash = hash;
+        block->niv = qcrypto_cipher_get_iv_len(cipheralg,
+                                               ciphermode);
+        block->ivgen = qcrypto_ivgen_new(ivalg,
+                                         ivcipheralg,
+                                         ivhash,
+                                         masterkey, masterkeylen,
+                                         errp);
+        if (!block->ivgen) {
+            ret = -ENOTSUP;
+            goto fail;
+        }
+
+        block->cipher = qcrypto_cipher_new(cipheralg,
+                                           ciphermode,
+                                           masterkey, masterkeylen,
+                                           errp);
+        if (!block->cipher) {
+            ret = -ENOTSUP;
+            goto fail;
+        }
+    }
+
+    block->payload_offset = luks->header.payload_offset *
+        QCRYPTO_BLOCK_LUKS_SECTOR_SIZE;
+
+    g_free(masterkey);
+    g_free(password);
+
+    return 0;
+
+ fail:
+    g_free(masterkey);
+    qcrypto_cipher_free(block->cipher);
+    qcrypto_ivgen_free(block->ivgen);
+    g_free(luks);
+    g_free(password);
+    return ret;
+}
+
+
+static int
+qcrypto_block_luks_uuid_gen(uint8_t *uuidstr, Error **errp)
+{
+#ifdef CONFIG_UUID
+    uuid_t uuid;
+    uuid_generate(uuid);
+    uuid_unparse(uuid, (char *)uuidstr);
+    return 0;
+#else
+    error_setg(errp, "Unable to generate uuids on this platform");
+    return -1;
+#endif
+}
+
+static int
+qcrypto_block_luks_create(QCryptoBlock *block,
+                          QCryptoBlockCreateOptions *options,
+                          QCryptoBlockInitFunc initfunc,
+                          QCryptoBlockWriteFunc writefunc,
+                          void *opaque,
+                          Error **errp)
+{
+    QCryptoBlockLUKS *luks;
+    QCryptoBlockCreateOptionsLUKS luks_opts;
+    Error *local_err = NULL;
+    uint8_t *masterkey = NULL;
+    uint8_t *slotkey = NULL;
+    uint8_t *splitkey = NULL;
+    size_t splitkeylen = 0;
+    size_t i;
+    QCryptoCipher *cipher = NULL;
+    QCryptoIVGen *ivgen = NULL;
+    char *password;
+    const char *cipher_alg;
+    const char *cipher_mode;
+    const char *ivgen_alg;
+    const char *ivgen_hash_alg = NULL;
+    const char *hash_alg;
+    char *cipher_mode_spec = NULL;
+    QCryptoCipherAlgorithm ivcipheralg = 0;
+
+    memcpy(&luks_opts, &options->u.luks, sizeof(luks_opts));
+    if (!luks_opts.has_cipher_alg) {
+        luks_opts.cipher_alg = QCRYPTO_CIPHER_ALG_AES_256;
+    }
+    if (!luks_opts.has_cipher_mode) {
+        luks_opts.cipher_mode = QCRYPTO_CIPHER_MODE_XTS;
+    }
+    if (!luks_opts.has_ivgen_alg) {
+        luks_opts.ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64;
+    }
+    if (!luks_opts.has_hash_alg) {
+        luks_opts.hash_alg = QCRYPTO_HASH_ALG_SHA256;
+    }
+
+    if (!options->u.luks.key_secret) {
+        error_setg(errp, "Parameter 'key-secret' is required for cipher");
+        return -1;
+    }
+    password = qcrypto_secret_lookup_as_utf8(luks_opts.key_secret, errp);
+    if (!password) {
+        return -1;
+    }
+
+    luks = g_new0(QCryptoBlockLUKS, 1);
+    block->opaque = luks;
+
+    memcpy(luks->header.magic, qcrypto_block_luks_magic,
+           QCRYPTO_BLOCK_LUKS_MAGIC_LEN);
+
+    /* We populate the header in native endianness initially and
+     * then convert everything to big endian just before writing
+     * it out to disk
+     */
+    luks->header.version = QCRYPTO_BLOCK_LUKS_VERSION;
+    if (qcrypto_block_luks_uuid_gen(luks->header.uuid,
+                                    errp) < 0) {
+        goto error;
+    }
+
+    cipher_alg = qcrypto_block_luks_cipher_alg_lookup(luks_opts.cipher_alg,
+                                                      errp);
+    if (!cipher_alg) {
+        goto error;
+    }
+
+    cipher_mode = QCryptoCipherMode_lookup[luks_opts.cipher_mode];
+    ivgen_alg = QCryptoIVGenAlgorithm_lookup[luks_opts.ivgen_alg];
+    if (luks_opts.has_ivgen_hash_alg) {
+        ivgen_hash_alg = QCryptoHashAlgorithm_lookup[luks_opts.ivgen_hash_alg];
+        cipher_mode_spec = g_strdup_printf("%s-%s:%s", cipher_mode, ivgen_alg,
+                                           ivgen_hash_alg);
+    } else {
+        cipher_mode_spec = g_strdup_printf("%s-%s", cipher_mode, ivgen_alg);
+    }
+    hash_alg = QCryptoHashAlgorithm_lookup[luks_opts.hash_alg];
+
+
+    if (strlen(cipher_alg) >= QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN) {
+        error_setg(errp, "Cipher name '%s' is too long for LUKS header",
+                   cipher_alg);
+        goto error;
+    }
+    if (strlen(cipher_mode_spec) >= QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN) {
+        error_setg(errp, "Cipher mode '%s' is too long for LUKS header",
+                   cipher_mode_spec);
+        goto error;
+    }
+    if (strlen(hash_alg) >= QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN) {
+        error_setg(errp, "Hash name '%s' is too long for LUKS header",
+                   hash_alg);
+        goto error;
+    }
+
+    if (luks_opts.ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) {
+        ivcipheralg = qcrypto_block_luks_essiv_cipher(luks_opts.cipher_alg,
+                                                      luks_opts.ivgen_hash_alg,
+                                                      &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            goto error;
+        }
+    } else {
+        ivcipheralg = luks_opts.cipher_alg;
+    }
+
+    strcpy(luks->header.cipher_name, cipher_alg);
+    strcpy(luks->header.cipher_mode, cipher_mode_spec);
+    strcpy(luks->header.hash_spec, hash_alg);
+
+    luks->header.key_bytes = qcrypto_cipher_get_key_len(luks_opts.cipher_alg);
+    if (luks_opts.cipher_mode == QCRYPTO_CIPHER_MODE_XTS) {
+        luks->header.key_bytes *= 2;
+    }
+
+    /* Generate the salt used for hashing the master key
+     * with PBKDF later
+     */
+    if (qcrypto_random_bytes(luks->header.master_key_salt,
+                             QCRYPTO_BLOCK_LUKS_SALT_LEN,
+                             errp) < 0) {
+        goto error;
+    }
+
+    /* Generate random master key */
+    masterkey = g_new0(uint8_t, luks->header.key_bytes);
+    if (qcrypto_random_bytes(masterkey,
+                             luks->header.key_bytes, errp) < 0) {
+        goto error;
+    }
+
+
+    /* Setup the block device payload encryption objects */
+    block->cipher = qcrypto_cipher_new(luks_opts.cipher_alg,
+                                       luks_opts.cipher_mode,
+                                       masterkey, luks->header.key_bytes,
+                                       errp);
+    if (!block->cipher) {
+        goto error;
+    }
+
+    block->kdfhash = luks_opts.hash_alg;
+    block->niv = qcrypto_cipher_get_iv_len(luks_opts.cipher_alg,
+                                           luks_opts.cipher_mode);
+    block->ivgen = qcrypto_ivgen_new(luks_opts.ivgen_alg,
+                                     ivcipheralg,
+                                     luks_opts.ivgen_hash_alg,
+                                     masterkey, luks->header.key_bytes,
+                                     errp);
+
+    if (!block->ivgen) {
+        goto error;
+    }
+
+
+    /* Determine how many iterations we need to hash the master
+     * key, in order to have 1 second of compute time used
+     */
+    luks->header.master_key_iterations =
+        qcrypto_pbkdf2_count_iters(luks_opts.hash_alg,
+                                   masterkey, luks->header.key_bytes,
+                                   luks->header.master_key_salt,
+                                   QCRYPTO_BLOCK_LUKS_SALT_LEN,
+                                   &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        goto error;
+    }
+
+    /* Why /= 8 ?  That matches cryptsetup, but there's no
+     * explanation why they chose /= 8... Probably so that
+     * if all 8 keyslots are active we only spend 1 second
+     * in total time to check all keys */
+    luks->header.master_key_iterations /= 8;
+    luks->header.master_key_iterations = MAX(
+        luks->header.master_key_iterations,
+        QCRYPTO_BLOCK_LUKS_MIN_MASTER_KEY_ITERS);
+
+
+    /* Hash the master key, saving the result in the LUKS
+     * header. This hash is used when opening the encrypted
+     * device to verify that the user password unlocked a
+     * valid master key
+     */
+    if (qcrypto_pbkdf2(luks_opts.hash_alg,
+                       masterkey, luks->header.key_bytes,
+                       luks->header.master_key_salt,
+                       QCRYPTO_BLOCK_LUKS_SALT_LEN,
+                       luks->header.master_key_iterations,
+                       luks->header.master_key_digest,
+                       QCRYPTO_BLOCK_LUKS_DIGEST_LEN,
+                       errp) < 0) {
+        goto error;
+    }
+
+
+    /* Although LUKS has multiple key slots, we're just going
+     * to use the first key slot */
+    splitkeylen = luks->header.key_bytes * QCRYPTO_BLOCK_LUKS_STRIPES;
+    for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) {
+        luks->header.key_slots[i].active = i == 0 ?
+            QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED :
+            QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED;
+        luks->header.key_slots[i].stripes = QCRYPTO_BLOCK_LUKS_STRIPES;
+
+        /* This calculation doesn't match that shown in the spec,
+         * but instead follows the cryptsetup implementation.
+         */
+        luks->header.key_slots[i].key_offset =
+            (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET /
+             QCRYPTO_BLOCK_LUKS_SECTOR_SIZE) +
+            (ROUND_UP(((splitkeylen + (QCRYPTO_BLOCK_LUKS_SECTOR_SIZE - 1)) /
+                       QCRYPTO_BLOCK_LUKS_SECTOR_SIZE),
+                      (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET /
+                       QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)) * i);
+    }
+
+    if (qcrypto_random_bytes(luks->header.key_slots[0].salt,
+                             QCRYPTO_BLOCK_LUKS_SALT_LEN,
+                             errp) < 0) {
+        goto error;
+    }
+
+    /* Again we determine how many iterations are required to
+     * hash the user password while consuming 1 second of compute
+     * time */
+    luks->header.key_slots[0].iterations =
+        qcrypto_pbkdf2_count_iters(luks_opts.hash_alg,
+                                   (uint8_t *)password, strlen(password),
+                                   luks->header.key_slots[0].salt,
+                                   QCRYPTO_BLOCK_LUKS_SALT_LEN,
+                                   &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        goto error;
+    }
+    /* Why /= 2 ?  That matches cryptsetup, but there's no
+     * explanation why they chose /= 2... */
+    luks->header.key_slots[0].iterations /= 2;
+    luks->header.key_slots[0].iterations = MAX(
+        luks->header.key_slots[0].iterations,
+        QCRYPTO_BLOCK_LUKS_MIN_SLOT_KEY_ITERS);
+
+
+    /* Generate a key that we'll use to encrypt the master
+     * key, from the user's password
+     */
+    slotkey = g_new0(uint8_t, luks->header.key_bytes);
+    if (qcrypto_pbkdf2(luks_opts.hash_alg,
+                       (uint8_t *)password, strlen(password),
+                       luks->header.key_slots[0].salt,
+                       QCRYPTO_BLOCK_LUKS_SALT_LEN,
+                       luks->header.key_slots[0].iterations,
+                       slotkey, luks->header.key_bytes,
+                       errp) < 0) {
+        goto error;
+    }
+
+
+    /* Setup the encryption objects needed to encrypt the
+     * master key material
+     */
+    cipher = qcrypto_cipher_new(luks_opts.cipher_alg,
+                                luks_opts.cipher_mode,
+                                slotkey, luks->header.key_bytes,
+                                errp);
+    if (!cipher) {
+        goto error;
+    }
+
+    ivgen = qcrypto_ivgen_new(luks_opts.ivgen_alg,
+                              ivcipheralg,
+                              luks_opts.ivgen_hash_alg,
+                              slotkey, luks->header.key_bytes,
+                              errp);
+    if (!ivgen) {
+        goto error;
+    }
+
+    /* Before storing the master key, we need to vastly
+     * increase its size, as protection against forensic
+     * disk data recovery */
+    splitkey = g_new0(uint8_t, splitkeylen);
+
+    if (qcrypto_afsplit_encode(luks_opts.hash_alg,
+                               luks->header.key_bytes,
+                               luks->header.key_slots[0].stripes,
+                               masterkey,
+                               splitkey,
+                               errp) < 0) {
+        goto error;
+    }
+
+    /* Now we encrypt the split master key with the key generated
+     * from the user's password, before storing it */
+    if (qcrypto_block_encrypt_helper(cipher, block->niv, ivgen,
+                                     QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
+                                     0,
+                                     splitkey,
+                                     splitkeylen,
+                                     errp) < 0) {
+        goto error;
+    }
+
+
+    /* The total size of the LUKS headers is the partition header + key
+     * slot headers, rounded up to the nearest sector, combined with
+     * the size of each master key material region, also rounded up
+     * to the nearest sector */
+    luks->header.payload_offset =
+        (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET /
+         QCRYPTO_BLOCK_LUKS_SECTOR_SIZE) +
+        (ROUND_UP(((splitkeylen + (QCRYPTO_BLOCK_LUKS_SECTOR_SIZE - 1)) /
+                   QCRYPTO_BLOCK_LUKS_SECTOR_SIZE),
+                  (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET /
+                   QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)) *
+         QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS);
+
+    block->payload_offset = luks->header.payload_offset *
+        QCRYPTO_BLOCK_LUKS_SECTOR_SIZE;
+
+    /* Reserve header space to match payload offset */
+    initfunc(block, block->payload_offset, &local_err, opaque);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        goto error;
+    }
+
+    /* Everything on disk uses Big Endian, so flip header fields
+     * before writing them */
+    cpu_to_be16s(&luks->header.version);
+    cpu_to_be32s(&luks->header.payload_offset);
+    cpu_to_be32s(&luks->header.key_bytes);
+    cpu_to_be32s(&luks->header.master_key_iterations);
+
+    for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) {
+        cpu_to_be32s(&luks->header.key_slots[i].active);
+        cpu_to_be32s(&luks->header.key_slots[i].iterations);
+        cpu_to_be32s(&luks->header.key_slots[i].key_offset);
+        cpu_to_be32s(&luks->header.key_slots[i].stripes);
+    }
+
+
+    /* Write out the partition header and key slot headers */
+    writefunc(block, 0,
+              (const uint8_t *)&luks->header,
+              sizeof(luks->header),
+              &local_err,
+              opaque);
+
+    /* Delay checking local_err until we've byte-swapped */
+
+    /* Byte swap the header back to native, in case we need
+     * to read it again later */
+    be16_to_cpus(&luks->header.version);
+    be32_to_cpus(&luks->header.payload_offset);
+    be32_to_cpus(&luks->header.key_bytes);
+    be32_to_cpus(&luks->header.master_key_iterations);
+
+    for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) {
+        be32_to_cpus(&luks->header.key_slots[i].active);
+        be32_to_cpus(&luks->header.key_slots[i].iterations);
+        be32_to_cpus(&luks->header.key_slots[i].key_offset);
+        be32_to_cpus(&luks->header.key_slots[i].stripes);
+    }
+
+    if (local_err) {
+        error_propagate(errp, local_err);
+        goto error;
+    }
+
+    /* Write out the master key material, starting at the
+     * sector immediately following the partition header. */
+    if (writefunc(block,
+                  luks->header.key_slots[0].key_offset *
+                  QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
+                  splitkey, splitkeylen,
+                  errp,
+                  opaque) != splitkeylen) {
+        goto error;
+    }
+
+    memset(masterkey, 0, luks->header.key_bytes);
+    g_free(masterkey);
+    memset(slotkey, 0, luks->header.key_bytes);
+    g_free(slotkey);
+    g_free(splitkey);
+    g_free(password);
+    g_free(cipher_mode_spec);
+
+    qcrypto_ivgen_free(ivgen);
+    qcrypto_cipher_free(cipher);
+
+    return 0;
+
+ error:
+    if (masterkey) {
+        memset(masterkey, 0, luks->header.key_bytes);
+    }
+    g_free(masterkey);
+    if (slotkey) {
+        memset(slotkey, 0, luks->header.key_bytes);
+    }
+    g_free(slotkey);
+    g_free(splitkey);
+    g_free(password);
+    g_free(cipher_mode_spec);
+
+    qcrypto_ivgen_free(ivgen);
+    qcrypto_cipher_free(cipher);
+
+    g_free(luks);
+    return -1;
+}
+
+
+static void qcrypto_block_luks_cleanup(QCryptoBlock *block)
+{
+    g_free(block->opaque);
+}
+
+
+static int
+qcrypto_block_luks_decrypt(QCryptoBlock *block,
+                           uint64_t startsector,
+                           uint8_t *buf,
+                           size_t len,
+                           Error **errp)
+{
+    return qcrypto_block_decrypt_helper(block->cipher,
+                                        block->niv, block->ivgen,
+                                        QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
+                                        startsector, buf, len, errp);
+}
+
+
+static int
+qcrypto_block_luks_encrypt(QCryptoBlock *block,
+                           uint64_t startsector,
+                           uint8_t *buf,
+                           size_t len,
+                           Error **errp)
+{
+    return qcrypto_block_encrypt_helper(block->cipher,
+                                        block->niv, block->ivgen,
+                                        QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
+                                        startsector, buf, len, errp);
+}
+
+
+const QCryptoBlockDriver qcrypto_block_driver_luks = {
+    .open = qcrypto_block_luks_open,
+    .create = qcrypto_block_luks_create,
+    .cleanup = qcrypto_block_luks_cleanup,
+    .decrypt = qcrypto_block_luks_decrypt,
+    .encrypt = qcrypto_block_luks_encrypt,
+    .has_format = qcrypto_block_luks_has_format,
+};
diff --git a/crypto/block-luks.h b/crypto/block-luks.h
new file mode 100644
index 0000000..0934138
--- /dev/null
+++ b/crypto/block-luks.h
@@ -0,0 +1,28 @@
+/*
+ * QEMU Crypto block device encryption LUKS format
+ *
+ * Copyright (c) 2015-2016 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef QCRYPTO_BLOCK_LUKS_H__
+#define QCRYPTO_BLOCK_LUKS_H__
+
+#include "crypto/blockpriv.h"
+
+extern const QCryptoBlockDriver qcrypto_block_driver_luks;
+
+#endif /* QCRYPTO_BLOCK_LUKS_H__ */
diff --git a/crypto/block.c b/crypto/block.c
index 3c27ef0..524ed91 100644
--- a/crypto/block.c
+++ b/crypto/block.c
@@ -21,9 +21,11 @@
 #include "qemu/osdep.h"
 #include "crypto/blockpriv.h"
 #include "crypto/block-qcow.h"
+#include "crypto/block-luks.h"
 
 static const QCryptoBlockDriver *qcrypto_block_drivers[] = {
     [Q_CRYPTO_BLOCK_FORMAT_QCOW] = &qcrypto_block_driver_qcow,
+    [Q_CRYPTO_BLOCK_FORMAT_LUKS] = &qcrypto_block_driver_luks,
 };
 
 
diff --git a/qapi/crypto.json b/qapi/crypto.json
index 65f4625..760d0c0 100644
--- a/qapi/crypto.json
+++ b/qapi/crypto.json
@@ -117,12 +117,13 @@
 #
 # @qcow: QCow/QCow2 built-in AES-CBC encryption. Use only
 #        for liberating data from old images.
+# @luks: LUKS encryption format. Recommended for new images
 #
 # Since: 2.6
 ##
 { 'enum': 'QCryptoBlockFormat',
 #  'prefix': 'QCRYPTO_BLOCK_FORMAT',
-  'data': ['qcow']}
+  'data': ['qcow', 'luks']}
 
 ##
 # QCryptoBlockOptionsBase:
@@ -152,6 +153,46 @@
   'data': { '*key-secret': 'str' }}
 
 ##
+# QCryptoBlockOptionsLUKS:
+#
+# The options that apply to LUKS encryption format
+#
+# @key-secret: #optional the ID of a QCryptoSecret object providing the
+#              decryption key. Mandatory except when probing image for
+#              metadata only.
+# Since: 2.6
+##
+{ 'struct': 'QCryptoBlockOptionsLUKS',
+  'data': { '*key-secret': 'str' }}
+
+
+##
+# QCryptoBlockCreateOptionsLUKS:
+#
+# The options that apply to LUKS encryption format initialization
+#
+# @cipher-alg: #optional the cipher algorithm for data encryption
+#              Currently defaults to 'aes'.
+# @cipher-mode: #optional the cipher mode for data encryption
+#               Currently defaults to 'cbc'
+# @ivgen-alg: #optional the initialization vector generator
+#             Currently defaults to 'essiv'
+# @ivgen-hash-alg: #optional the initialization vector generator hash
+#                  Currently defaults to 'sha256'
+# @hash-alg: #optional the master key hash algorithm
+#            Currently defaults to 'sha256'
+# Since: 2.6
+##
+{ 'struct': 'QCryptoBlockCreateOptionsLUKS',
+  'base': 'QCryptoBlockOptionsLUKS',
+  'data': { '*cipher-alg': 'QCryptoCipherAlgorithm',
+            '*cipher-mode': 'QCryptoCipherMode',
+            '*ivgen-alg': 'QCryptoIVGenAlgorithm',
+            '*ivgen-hash-alg': 'QCryptoHashAlgorithm',
+            '*hash-alg': 'QCryptoHashAlgorithm'}}
+
+
+##
 # QCryptoBlockOpenOptions:
 #
 # The options that are available for all encryption formats
@@ -162,7 +203,8 @@
 { 'union': 'QCryptoBlockOpenOptions',
   'base': 'QCryptoBlockOptionsBase',
   'discriminator': 'format',
-  'data': { 'qcow': 'QCryptoBlockOptionsQCow' } }
+  'data': { 'qcow': 'QCryptoBlockOptionsQCow',
+            'luks': 'QCryptoBlockOptionsLUKS' } }
 
 
 ##
@@ -176,4 +218,5 @@
 { 'union': 'QCryptoBlockCreateOptions',
   'base': 'QCryptoBlockOptionsBase',
   'discriminator': 'format',
-  'data': { 'qcow': 'QCryptoBlockOptionsQCow' } }
+  'data': { 'qcow': 'QCryptoBlockOptionsQCow',
+            'luks': 'QCryptoBlockCreateOptionsLUKS' } }
diff --git a/tests/test-crypto-block.c b/tests/test-crypto-block.c
index 3f65383..cdbe09d 100644
--- a/tests/test-crypto-block.c
+++ b/tests/test-crypto-block.c
@@ -23,6 +23,15 @@
 #include "crypto/block.h"
 #include "qemu/buffer.h"
 #include "crypto/secret.h"
+#ifndef _WIN32
+#include <sys/resource.h>
+#endif
+
+#if defined(CONFIG_UUID) && (defined(_WIN32) || defined RUSAGE_THREAD)
+#define TEST_LUKS
+#else
+#undef TEST_LUKS
+#endif
 
 static QCryptoBlockCreateOptions qcow_create_opts = {
     .format = Q_CRYPTO_BLOCK_FORMAT_QCOW,
@@ -40,6 +49,63 @@ static QCryptoBlockOpenOptions qcow_open_opts = {
     },
 };
 
+
+#ifdef TEST_LUKS
+static QCryptoBlockOpenOptions luks_open_opts = {
+    .format = Q_CRYPTO_BLOCK_FORMAT_LUKS,
+    .u.luks = {
+        .has_key_secret = true,
+        .key_secret = (char *)"sec0",
+    },
+};
+
+
+/* Creation with all default values */
+static QCryptoBlockCreateOptions luks_create_opts_default = {
+    .format = Q_CRYPTO_BLOCK_FORMAT_LUKS,
+    .u.luks = {
+        .has_key_secret = true,
+        .key_secret = (char *)"sec0",
+    },
+};
+
+
+/* ...and with explicit values */
+static QCryptoBlockCreateOptions luks_create_opts_aes256_cbc_plain64 = {
+    .format = Q_CRYPTO_BLOCK_FORMAT_LUKS,
+    .u.luks = {
+        .has_key_secret = true,
+        .key_secret = (char *)"sec0",
+        .has_cipher_alg = true,
+        .cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
+        .has_cipher_mode = true,
+        .cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
+        .has_ivgen_alg = true,
+        .ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64,
+    },
+};
+
+
+static QCryptoBlockCreateOptions luks_create_opts_aes256_cbc_essiv = {
+    .format = Q_CRYPTO_BLOCK_FORMAT_LUKS,
+    .u.luks = {
+        .has_key_secret = true,
+        .key_secret = (char *)"sec0",
+        .has_cipher_alg = true,
+        .cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
+        .has_cipher_mode = true,
+        .cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
+        .has_ivgen_alg = true,
+        .ivgen_alg = QCRYPTO_IVGEN_ALG_ESSIV,
+        .has_ivgen_hash_alg = true,
+        .ivgen_hash_alg = QCRYPTO_HASH_ALG_SHA256,
+        .has_hash_alg = true,
+        .hash_alg = QCRYPTO_HASH_ALG_SHA1,
+    },
+};
+#endif /* TEST_LUKS */
+
+
 static struct QCryptoBlockTestData {
     const char *path;
     QCryptoBlockCreateOptions *create_opts;
@@ -52,7 +118,9 @@ static struct QCryptoBlockTestData {
     QCryptoHashAlgorithm hash_alg;
 
     QCryptoIVGenAlgorithm ivgen_alg;
-    QCryptoCipherAlgorithm ivgen_hash;
+    QCryptoHashAlgorithm ivgen_hash;
+
+    bool slow;
 } test_data[] = {
     {
         .path = "/crypto/block/qcow",
@@ -66,6 +134,54 @@ static struct QCryptoBlockTestData {
 
         .ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64,
     },
+#ifdef TEST_LUKS
+    {
+        .path = "/crypto/block/luks/default",
+        .create_opts = &luks_create_opts_default,
+        .open_opts = &luks_open_opts,
+
+        .expect_header = true,
+
+        .cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
+        .cipher_mode = QCRYPTO_CIPHER_MODE_XTS,
+        .hash_alg = QCRYPTO_HASH_ALG_SHA256,
+
+        .ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64,
+
+        .slow = true,
+    },
+    {
+        .path = "/crypto/block/luks/aes-256-cbc-plain64",
+        .create_opts = &luks_create_opts_aes256_cbc_plain64,
+        .open_opts = &luks_open_opts,
+
+        .expect_header = true,
+
+        .cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
+        .cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
+        .hash_alg = QCRYPTO_HASH_ALG_SHA256,
+
+        .ivgen_alg = QCRYPTO_IVGEN_ALG_PLAIN64,
+
+        .slow = true,
+    },
+    {
+        .path = "/crypto/block/luks/aes-256-cbc-essiv",
+        .create_opts = &luks_create_opts_aes256_cbc_essiv,
+        .open_opts = &luks_open_opts,
+
+        .expect_header = true,
+
+        .cipher_alg = QCRYPTO_CIPHER_ALG_AES_256,
+        .cipher_mode = QCRYPTO_CIPHER_MODE_CBC,
+        .hash_alg = QCRYPTO_HASH_ALG_SHA1,
+
+        .ivgen_alg = QCRYPTO_IVGEN_ALG_ESSIV,
+        .ivgen_hash = QCRYPTO_HASH_ALG_SHA256,
+
+        .slow = true,
+    },
+#endif
 };
 
 
@@ -232,7 +348,14 @@ int main(int argc, char **argv)
     g_assert(qcrypto_init(NULL) == 0);
 
     for (i = 0; i < G_N_ELEMENTS(test_data); i++) {
-        g_test_add_data_func(test_data[i].path, &test_data[i], test_block);
+        if (test_data[i].open_opts->format == Q_CRYPTO_BLOCK_FORMAT_LUKS &&
+            !qcrypto_hash_supports(test_data[i].hash_alg)) {
+            continue;
+        }
+        if (!test_data[i].slow ||
+            g_test_slow()) {
+            g_test_add_data_func(test_data[i].path, &test_data[i], test_block);
+        }
     }
 
     return g_test_run();
