diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs
index 454f9db..e6590dc 100644
--- a/crypto/Makefile.objs
+++ b/crypto/Makefile.objs
@@ -18,6 +18,7 @@ crypto-obj-y += ivgen-essiv.o
 crypto-obj-y += ivgen-plain.o
 crypto-obj-y += ivgen-plain64.o
 crypto-obj-y += afsplit.o
+crypto-obj-y += xts.o
 
 # Let the userspace emulators avoid linking gnutls/etc
 crypto-aes-obj-y = aes.o
diff --git a/crypto/xts.c b/crypto/xts.c
new file mode 100644
index 0000000..9521234
--- /dev/null
+++ b/crypto/xts.c
@@ -0,0 +1,230 @@
+/*
+ * QEMU Crypto XTS cipher mode
+ *
+ * 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/>.
+ *
+ * This code is originally derived from public domain / WTFPL code in
+ * LibTomCrypt crytographic library http://libtom.org. The XTS code
+ * was donated by Elliptic Semiconductor Inc (www.ellipticsemi.com)
+ * to the LibTom Projects
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "crypto/xts.h"
+
+static void xts_mult_x(uint8_t *I)
+{
+    int x;
+    uint8_t t, tt;
+
+    for (x = t = 0; x < 16; x++) {
+        tt = I[x] >> 7;
+        I[x] = ((I[x] << 1) | t) & 0xFF;
+        t = tt;
+    }
+    if (tt) {
+        I[0] ^= 0x87;
+    }
+}
+
+
+/**
+ * xts_tweak_uncrypt:
+ * @param ctxt: the cipher context
+ * @param func: the cipher function
+ * @src: buffer providing the cipher text of XTS_BLOCK_SIZE bytes
+ * @dst: buffer to output the plain text of XTS_BLOCK_SIZE bytes
+ * @iv: the initialization vector tweak of XTS_BLOCK_SIZE bytes
+ *
+ * Decrypt data with a tweak
+ */
+static void xts_tweak_decrypt(const void *ctx,
+                              xts_cipher_func *func,
+                              const uint8_t *src,
+                              uint8_t *dst,
+                              uint8_t *iv)
+{
+    unsigned long x;
+
+    /* tweak encrypt block i */
+    for (x = 0; x < XTS_BLOCK_SIZE; x++) {
+        dst[x] = src[x] ^ iv[x];
+    }
+
+    func(ctx, XTS_BLOCK_SIZE, dst, dst);
+
+    for (x = 0; x < XTS_BLOCK_SIZE; x++) {
+        dst[x] = dst[x] ^ iv[x];
+    }
+
+    /* LFSR the tweak */
+    xts_mult_x(iv);
+}
+
+
+void xts_decrypt(const void *datactx,
+                 const void *tweakctx,
+                 xts_cipher_func *encfunc,
+                 xts_cipher_func *decfunc,
+                 uint8_t *iv,
+                 size_t length,
+                 uint8_t *dst,
+                 const uint8_t *src)
+{
+    uint8_t PP[XTS_BLOCK_SIZE], CC[XTS_BLOCK_SIZE], T[XTS_BLOCK_SIZE];
+    unsigned long i, m, mo, lim;
+
+    /* get number of blocks */
+    m = length >> 4;
+    mo = length & 15;
+
+    /* must have at least one full block */
+    g_assert(m != 0);
+
+    if (mo == 0) {
+        lim = m;
+    } else {
+        lim = m - 1;
+    }
+
+    /* encrypt the iv */
+    encfunc(tweakctx, XTS_BLOCK_SIZE, T, iv);
+
+    for (i = 0; i < lim; i++) {
+        xts_tweak_decrypt(datactx, decfunc, src, dst, T);
+
+        src += XTS_BLOCK_SIZE;
+        dst += XTS_BLOCK_SIZE;
+    }
+
+    /* if length is not a multiple of XTS_BLOCK_SIZE then */
+    if (mo > 0) {
+        memcpy(CC, T, XTS_BLOCK_SIZE);
+        xts_mult_x(CC);
+
+        /* PP = tweak decrypt block m-1 */
+        xts_tweak_decrypt(datactx, decfunc, src, PP, CC);
+
+        /* Pm = first length % XTS_BLOCK_SIZE bytes of PP */
+        for (i = 0; i < mo; i++) {
+            CC[i] = src[XTS_BLOCK_SIZE + i];
+            dst[XTS_BLOCK_SIZE + i] = PP[i];
+        }
+        for (; i < XTS_BLOCK_SIZE; i++) {
+            CC[i] = PP[i];
+        }
+
+        /* Pm-1 = Tweak uncrypt CC */
+        xts_tweak_decrypt(datactx, decfunc, CC, dst, T);
+    }
+
+    /* Decrypt the iv back */
+    decfunc(tweakctx, XTS_BLOCK_SIZE, iv, T);
+}
+
+
+/**
+ * xts_tweak_crypt:
+ * @param ctxt: the cipher context
+ * @param func: the cipher function
+ * @src: buffer providing the plain text of XTS_BLOCK_SIZE bytes
+ * @dst: buffer to output the cipher text of XTS_BLOCK_SIZE bytes
+ * @iv: the initialization vector tweak of XTS_BLOCK_SIZE bytes
+ *
+ * Encrypt data with a tweak
+ */
+static void xts_tweak_encrypt(const void *ctx,
+                              xts_cipher_func *func,
+                              const uint8_t *src,
+                              uint8_t *dst,
+                              uint8_t *iv)
+{
+    unsigned long x;
+
+    /* tweak encrypt block i */
+    for (x = 0; x < XTS_BLOCK_SIZE; x++) {
+        dst[x] = src[x] ^ iv[x];
+    }
+
+    func(ctx, XTS_BLOCK_SIZE, dst, dst);
+
+    for (x = 0; x < XTS_BLOCK_SIZE; x++) {
+        dst[x] = dst[x] ^ iv[x];
+    }
+
+    /* LFSR the tweak */
+    xts_mult_x(iv);
+}
+
+
+void xts_encrypt(const void *datactx,
+                 const void *tweakctx,
+                 xts_cipher_func *encfunc,
+                 xts_cipher_func *decfunc,
+                 uint8_t *iv,
+                 size_t length,
+                 uint8_t *dst,
+                 const uint8_t *src)
+{
+    uint8_t PP[XTS_BLOCK_SIZE], CC[XTS_BLOCK_SIZE], T[XTS_BLOCK_SIZE];
+    unsigned long i, m, mo, lim;
+
+    /* get number of blocks */
+    m = length >> 4;
+    mo = length & 15;
+
+    /* must have at least one full block */
+    g_assert(m != 0);
+
+    if (mo == 0) {
+        lim = m;
+    } else {
+        lim = m - 1;
+    }
+
+    /* encrypt the iv */
+    encfunc(tweakctx, XTS_BLOCK_SIZE, T, iv);
+
+    for (i = 0; i < lim; i++) {
+        xts_tweak_encrypt(datactx, encfunc, src, dst, T);
+
+        dst += XTS_BLOCK_SIZE;
+        src += XTS_BLOCK_SIZE;
+    }
+
+    /* if length is not a multiple of XTS_BLOCK_SIZE then */
+    if (mo > 0) {
+        /* CC = tweak encrypt block m-1 */
+        xts_tweak_encrypt(datactx, encfunc, src, CC, T);
+
+        /* Cm = first length % XTS_BLOCK_SIZE bytes of CC */
+        for (i = 0; i < mo; i++) {
+            PP[i] = src[XTS_BLOCK_SIZE + i];
+            dst[XTS_BLOCK_SIZE + i] = CC[i];
+        }
+
+        for (; i < XTS_BLOCK_SIZE; i++) {
+            PP[i] = CC[i];
+        }
+
+        /* Cm-1 = Tweak encrypt PP */
+        xts_tweak_encrypt(datactx, encfunc, PP, dst, T);
+    }
+
+    /* Decrypt the iv back */
+    decfunc(tweakctx, XTS_BLOCK_SIZE, iv, T);
+}
diff --git a/include/crypto/xts.h b/include/crypto/xts.h
new file mode 100644
index 0000000..c2924d8
--- /dev/null
+++ b/include/crypto/xts.h
@@ -0,0 +1,86 @@
+/*
+ * QEMU Crypto XTS cipher mode
+ *
+ * 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/>.
+ *
+ * This code is originally derived from public domain / WTFPL code in
+ * LibTomCrypt crytographic library http://libtom.org. The XTS code
+ * was donated by Elliptic Semiconductor Inc (www.ellipticsemi.com)
+ * to the LibTom Projects
+ *
+ */
+
+
+#ifndef QCRYPTO_XTS_H_
+#define QCRYPTO_XTS_H_
+
+#include "qemu-common.h"
+#include "qapi/error.h"
+
+
+#define XTS_BLOCK_SIZE 16
+
+typedef void xts_cipher_func(const void *ctx,
+                             size_t length,
+                             uint8_t *dst,
+                             const uint8_t *src);
+
+/**
+ * xts_decrypt:
+ * @datactx: the cipher context for data decryption
+ * @tweakctx: the cipher context for tweak decryption
+ * @encfunc: the cipher function for encryption
+ * @decfunc: the cipher function for decryption
+ * @iv: the initialization vector tweak of XTS_BLOCK_SIZE bytes
+ * @length: the length of @dst and @src
+ * @dst: buffer to hold the decrypted plaintext
+ * @src: buffer providing the ciphertext
+ *
+ * Decrypts @src into @dst
+ */
+void xts_decrypt(const void *datactx,
+                 const void *tweakctx,
+                 xts_cipher_func *encfunc,
+                 xts_cipher_func *decfunc,
+                 uint8_t *iv,
+                 size_t length,
+                 uint8_t *dst,
+                 const uint8_t *src);
+
+/**
+ * xts_decrypt:
+ * @datactx: the cipher context for data encryption
+ * @tweakctx: the cipher context for tweak encryption
+ * @encfunc: the cipher function for encryption
+ * @decfunc: the cipher function for decryption
+ * @iv: the initialization vector tweak of XTS_BLOCK_SIZE bytes
+ * @length: the length of @dst and @src
+ * @dst: buffer to hold the encrypted ciphertext
+ * @src: buffer providing the plaintext
+ *
+ * Decrypts @src into @dst
+ */
+void xts_encrypt(const void *datactx,
+                 const void *tweakctx,
+                 xts_cipher_func *encfunc,
+                 xts_cipher_func *decfunc,
+                 uint8_t *iv,
+                 size_t length,
+                 uint8_t *dst,
+                 const uint8_t *src);
+
+
+#endif /* QCRYPTO_XTS_H_ */
diff --git a/tests/.gitignore b/tests/.gitignore
index 5b97e8c..b3170ba 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -25,6 +25,7 @@ test-crypto-tlssession
 test-crypto-tlssession-work/
 test-crypto-tlssession-client/
 test-crypto-tlssession-server/
+test-crypto-xts
 test-cutils
 test-hbitmap
 test-int128
diff --git a/tests/Makefile b/tests/Makefile
index 6e10939..e060061 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -95,6 +95,7 @@ check-unit-y += tests/test-base64$(EXESUF)
 check-unit-$(if $(CONFIG_NETTLE),y,$(CONFIG_GCRYPT_KDF)) += tests/test-crypto-pbkdf$(EXESUF)
 check-unit-y += tests/test-crypto-ivgen$(EXESUF)
 check-unit-y += tests/test-crypto-afsplit$(EXESUF)
+check-unit-y += tests/test-crypto-xts$(EXESUF)
 
 check-block-$(CONFIG_POSIX) += tests/qemu-iotests-quick.sh
 
@@ -475,6 +476,7 @@ tests/test-bitops$(EXESUF): tests/test-bitops.o $(test-util-obj-y)
 tests/test-crypto-hash$(EXESUF): tests/test-crypto-hash.o $(test-crypto-obj-y)
 tests/test-crypto-cipher$(EXESUF): tests/test-crypto-cipher.o $(test-crypto-obj-y)
 tests/test-crypto-secret$(EXESUF): tests/test-crypto-secret.o $(test-crypto-obj-y)
+tests/test-crypto-xts$(EXESUF): tests/test-crypto-xts.o $(test-crypto-obj-y)
 
 tests/crypto-tls-x509-helpers.o-cflags := $(TASN1_CFLAGS)
 tests/crypto-tls-x509-helpers.o-libs := $(TASN1_LIBS)
diff --git a/tests/test-crypto-xts.c b/tests/test-crypto-xts.c
new file mode 100644
index 0000000..7f68b06
--- /dev/null
+++ b/tests/test-crypto-xts.c
@@ -0,0 +1,423 @@
+/*
+ * QEMU Crypto XTS cipher mode
+ *
+ * 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/>.
+ *
+ * This code is originally derived from public domain / WTFPL code in
+ * LibTomCrypt crytographic library http://libtom.org. The XTS code
+ * was donated by Elliptic Semiconductor Inc (www.ellipticsemi.com)
+ * to the LibTom Projects
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "crypto/init.h"
+#include "crypto/xts.h"
+#include "crypto/aes.h"
+
+typedef struct {
+    const char *path;
+    int keylen;
+    unsigned char key1[32];
+    unsigned char key2[32];
+    uint64_t seqnum;
+    unsigned long PTLEN;
+    unsigned char PTX[512], CTX[512];
+} QCryptoXTSTestData;
+
+static const QCryptoXTSTestData test_data[] = {
+    /* #1 32 byte key, 32 byte PTX */
+    {
+        "/crypto/xts/t-1-key-32-ptx-32",
+        32,
+        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+        0,
+        32,
+        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+        { 0x91, 0x7c, 0xf6, 0x9e, 0xbd, 0x68, 0xb2, 0xec,
+          0x9b, 0x9f, 0xe9, 0xa3, 0xea, 0xdd, 0xa6, 0x92,
+          0xcd, 0x43, 0xd2, 0xf5, 0x95, 0x98, 0xed, 0x85,
+          0x8c, 0x02, 0xc2, 0x65, 0x2f, 0xbf, 0x92, 0x2e },
+    },
+
+    /* #2, 32 byte key, 32 byte PTX */
+    {
+        "/crypto/xts/t-2-key-32-ptx-32",
+        32,
+        { 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
+          0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11 },
+        { 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
+          0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22 },
+        0x3333333333LL,
+        32,
+        { 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
+          0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
+          0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
+          0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44 },
+        { 0xc4, 0x54, 0x18, 0x5e, 0x6a, 0x16, 0x93, 0x6e,
+          0x39, 0x33, 0x40, 0x38, 0xac, 0xef, 0x83, 0x8b,
+          0xfb, 0x18, 0x6f, 0xff, 0x74, 0x80, 0xad, 0xc4,
+          0x28, 0x93, 0x82, 0xec, 0xd6, 0xd3, 0x94, 0xf0 },
+    },
+
+    /* #5 from xts.7, 32 byte key, 32 byte PTX */
+    {
+        "/crypto/xts/t-5-key-32-ptx-32",
+        32,
+        { 0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8,
+          0xf7, 0xf6, 0xf5, 0xf4, 0xf3, 0xf2, 0xf1, 0xf0 },
+        { 0xbf, 0xbe, 0xbd, 0xbc, 0xbb, 0xba, 0xb9, 0xb8,
+          0xb7, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xb0 },
+        0x123456789aLL,
+        32,
+        { 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
+          0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
+          0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,
+          0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44 },
+        { 0xb0, 0x1f, 0x86, 0xf8, 0xed, 0xc1, 0x86, 0x37,
+          0x06, 0xfa, 0x8a, 0x42, 0x53, 0xe3, 0x4f, 0x28,
+          0xaf, 0x31, 0x9d, 0xe3, 0x83, 0x34, 0x87, 0x0f,
+          0x4d, 0xd1, 0xf9, 0x4c, 0xbe, 0x98, 0x32, 0xf1 },
+    },
+
+    /* #4, 32 byte key, 512 byte PTX  */
+    {
+        "/crypto/xts/t-4-key-32-ptx-512",
+        32,
+        { 0x27, 0x18, 0x28, 0x18, 0x28, 0x45, 0x90, 0x45,
+          0x23, 0x53, 0x60, 0x28, 0x74, 0x71, 0x35, 0x26 },
+        { 0x31, 0x41, 0x59, 0x26, 0x53, 0x58, 0x97, 0x93,
+          0x23, 0x84, 0x62, 0x64, 0x33, 0x83, 0x27, 0x95 },
+        0,
+        512,
+        {
+            0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+            0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+            0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+            0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+            0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+            0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+            0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+            0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+            0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+            0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+            0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+            0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
+            0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+            0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+            0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+            0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
+            0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+            0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+            0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+            0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+            0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+            0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+            0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
+            0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
+            0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
+            0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
+            0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
+            0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
+            0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
+            0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
+            0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+            0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+            0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+            0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+            0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+            0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+            0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+            0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+            0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+            0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+            0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+            0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+            0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+            0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
+            0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+            0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+            0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+            0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
+            0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+            0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+            0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+            0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+            0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+            0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+            0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
+            0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
+            0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
+            0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
+            0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
+            0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
+            0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
+            0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
+            0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+            0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+        },
+        {
+            0x27, 0xa7, 0x47, 0x9b, 0xef, 0xa1, 0xd4, 0x76,
+            0x48, 0x9f, 0x30, 0x8c, 0xd4, 0xcf, 0xa6, 0xe2,
+            0xa9, 0x6e, 0x4b, 0xbe, 0x32, 0x08, 0xff, 0x25,
+            0x28, 0x7d, 0xd3, 0x81, 0x96, 0x16, 0xe8, 0x9c,
+            0xc7, 0x8c, 0xf7, 0xf5, 0xe5, 0x43, 0x44, 0x5f,
+            0x83, 0x33, 0xd8, 0xfa, 0x7f, 0x56, 0x00, 0x00,
+            0x05, 0x27, 0x9f, 0xa5, 0xd8, 0xb5, 0xe4, 0xad,
+            0x40, 0xe7, 0x36, 0xdd, 0xb4, 0xd3, 0x54, 0x12,
+            0x32, 0x80, 0x63, 0xfd, 0x2a, 0xab, 0x53, 0xe5,
+            0xea, 0x1e, 0x0a, 0x9f, 0x33, 0x25, 0x00, 0xa5,
+            0xdf, 0x94, 0x87, 0xd0, 0x7a, 0x5c, 0x92, 0xcc,
+            0x51, 0x2c, 0x88, 0x66, 0xc7, 0xe8, 0x60, 0xce,
+            0x93, 0xfd, 0xf1, 0x66, 0xa2, 0x49, 0x12, 0xb4,
+            0x22, 0x97, 0x61, 0x46, 0xae, 0x20, 0xce, 0x84,
+            0x6b, 0xb7, 0xdc, 0x9b, 0xa9, 0x4a, 0x76, 0x7a,
+            0xae, 0xf2, 0x0c, 0x0d, 0x61, 0xad, 0x02, 0x65,
+            0x5e, 0xa9, 0x2d, 0xc4, 0xc4, 0xe4, 0x1a, 0x89,
+            0x52, 0xc6, 0x51, 0xd3, 0x31, 0x74, 0xbe, 0x51,
+            0xa1, 0x0c, 0x42, 0x11, 0x10, 0xe6, 0xd8, 0x15,
+            0x88, 0xed, 0xe8, 0x21, 0x03, 0xa2, 0x52, 0xd8,
+            0xa7, 0x50, 0xe8, 0x76, 0x8d, 0xef, 0xff, 0xed,
+            0x91, 0x22, 0x81, 0x0a, 0xae, 0xb9, 0x9f, 0x91,
+            0x72, 0xaf, 0x82, 0xb6, 0x04, 0xdc, 0x4b, 0x8e,
+            0x51, 0xbc, 0xb0, 0x82, 0x35, 0xa6, 0xf4, 0x34,
+            0x13, 0x32, 0xe4, 0xca, 0x60, 0x48, 0x2a, 0x4b,
+            0xa1, 0xa0, 0x3b, 0x3e, 0x65, 0x00, 0x8f, 0xc5,
+            0xda, 0x76, 0xb7, 0x0b, 0xf1, 0x69, 0x0d, 0xb4,
+            0xea, 0xe2, 0x9c, 0x5f, 0x1b, 0xad, 0xd0, 0x3c,
+            0x5c, 0xcf, 0x2a, 0x55, 0xd7, 0x05, 0xdd, 0xcd,
+            0x86, 0xd4, 0x49, 0x51, 0x1c, 0xeb, 0x7e, 0xc3,
+            0x0b, 0xf1, 0x2b, 0x1f, 0xa3, 0x5b, 0x91, 0x3f,
+            0x9f, 0x74, 0x7a, 0x8a, 0xfd, 0x1b, 0x13, 0x0e,
+            0x94, 0xbf, 0xf9, 0x4e, 0xff, 0xd0, 0x1a, 0x91,
+            0x73, 0x5c, 0xa1, 0x72, 0x6a, 0xcd, 0x0b, 0x19,
+            0x7c, 0x4e, 0x5b, 0x03, 0x39, 0x36, 0x97, 0xe1,
+            0x26, 0x82, 0x6f, 0xb6, 0xbb, 0xde, 0x8e, 0xcc,
+            0x1e, 0x08, 0x29, 0x85, 0x16, 0xe2, 0xc9, 0xed,
+            0x03, 0xff, 0x3c, 0x1b, 0x78, 0x60, 0xf6, 0xde,
+            0x76, 0xd4, 0xce, 0xcd, 0x94, 0xc8, 0x11, 0x98,
+            0x55, 0xef, 0x52, 0x97, 0xca, 0x67, 0xe9, 0xf3,
+            0xe7, 0xff, 0x72, 0xb1, 0xe9, 0x97, 0x85, 0xca,
+            0x0a, 0x7e, 0x77, 0x20, 0xc5, 0xb3, 0x6d, 0xc6,
+            0xd7, 0x2c, 0xac, 0x95, 0x74, 0xc8, 0xcb, 0xbc,
+            0x2f, 0x80, 0x1e, 0x23, 0xe5, 0x6f, 0xd3, 0x44,
+            0xb0, 0x7f, 0x22, 0x15, 0x4b, 0xeb, 0xa0, 0xf0,
+            0x8c, 0xe8, 0x89, 0x1e, 0x64, 0x3e, 0xd9, 0x95,
+            0xc9, 0x4d, 0x9a, 0x69, 0xc9, 0xf1, 0xb5, 0xf4,
+            0x99, 0x02, 0x7a, 0x78, 0x57, 0x2a, 0xee, 0xbd,
+            0x74, 0xd2, 0x0c, 0xc3, 0x98, 0x81, 0xc2, 0x13,
+            0xee, 0x77, 0x0b, 0x10, 0x10, 0xe4, 0xbe, 0xa7,
+            0x18, 0x84, 0x69, 0x77, 0xae, 0x11, 0x9f, 0x7a,
+            0x02, 0x3a, 0xb5, 0x8c, 0xca, 0x0a, 0xd7, 0x52,
+            0xaf, 0xe6, 0x56, 0xbb, 0x3c, 0x17, 0x25, 0x6a,
+            0x9f, 0x6e, 0x9b, 0xf1, 0x9f, 0xdd, 0x5a, 0x38,
+            0xfc, 0x82, 0xbb, 0xe8, 0x72, 0xc5, 0x53, 0x9e,
+            0xdb, 0x60, 0x9e, 0xf4, 0xf7, 0x9c, 0x20, 0x3e,
+            0xbb, 0x14, 0x0f, 0x2e, 0x58, 0x3c, 0xb2, 0xad,
+            0x15, 0xb4, 0xaa, 0x5b, 0x65, 0x50, 0x16, 0xa8,
+            0x44, 0x92, 0x77, 0xdb, 0xd4, 0x77, 0xef, 0x2c,
+            0x8d, 0x6c, 0x01, 0x7d, 0xb7, 0x38, 0xb1, 0x8d,
+            0xeb, 0x4a, 0x42, 0x7d, 0x19, 0x23, 0xce, 0x3f,
+            0xf2, 0x62, 0x73, 0x57, 0x79, 0xa4, 0x18, 0xf2,
+            0x0a, 0x28, 0x2d, 0xf9, 0x20, 0x14, 0x7b, 0xea,
+            0xbe, 0x42, 0x1e, 0xe5, 0x31, 0x9d, 0x05, 0x68,
+        }
+    },
+
+    /* #7, 32 byte key, 17 byte PTX */
+    {
+        "/crypto/xts/t-7-key-32-ptx-17",
+        32,
+        { 0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8,
+          0xf7, 0xf6, 0xf5, 0xf4, 0xf3, 0xf2, 0xf1, 0xf0 },
+        { 0xbf, 0xbe, 0xbd, 0xbc, 0xbb, 0xba, 0xb9, 0xb8,
+          0xb7, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xb0 },
+        0x123456789aLL,
+        17,
+        { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+          0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10 },
+        { 0x6c, 0x16, 0x25, 0xdb, 0x46, 0x71, 0x52, 0x2d,
+          0x3d, 0x75, 0x99, 0x60, 0x1d, 0xe7, 0xca, 0x09, 0xed },
+    },
+
+    /* #15, 32 byte key, 25 byte PTX */
+    {
+        "/crypto/xts/t-15-key-32-ptx-25",
+        32,
+        { 0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8,
+          0xf7, 0xf6, 0xf5, 0xf4, 0xf3, 0xf2, 0xf1, 0xf0 },
+        { 0xbf, 0xbe, 0xbd, 0xbc, 0xbb, 0xba, 0xb9, 0xb8,
+          0xb7, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xb0 },
+        0x123456789aLL,
+        25,
+        { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+          0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+          0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18 },
+        { 0x8f, 0x4d, 0xcb, 0xad, 0x55, 0x55, 0x8d, 0x7b,
+          0x4e, 0x01, 0xd9, 0x37, 0x9c, 0xd4, 0xea, 0x22,
+          0xed, 0xbf, 0x9d, 0xac, 0xe4, 0x5d, 0x6f, 0x6a, 0x73 },
+    },
+
+    /* #21, 32 byte key, 31 byte PTX */
+    {
+        "/crypto/xts/t-21-key-32-ptx-31",
+        32,
+        { 0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8,
+          0xf7, 0xf6, 0xf5, 0xf4, 0xf3, 0xf2, 0xf1, 0xf0 },
+        { 0xbf, 0xbe, 0xbd, 0xbc, 0xbb, 0xba, 0xb9, 0xb8,
+          0xb7, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xb0 },
+        0x123456789aLL,
+        31,
+        { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+          0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+          0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+          0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e },
+        { 0xd0, 0x5b, 0xc0, 0x90, 0xa8, 0xe0, 0x4f, 0x1b,
+          0x3d, 0x3e, 0xcd, 0xd5, 0xba, 0xec, 0x0f, 0xd4,
+          0xed, 0xbf, 0x9d, 0xac, 0xe4, 0x5d, 0x6f, 0x6a,
+          0x73, 0x06, 0xe6, 0x4b, 0xe5, 0xdd, 0x82 },
+    },
+};
+
+#define STORE64L(x, y)                                                  \
+    do {                                                                \
+        (y)[7] = (unsigned char)(((x) >> 56) & 255);                    \
+        (y)[6] = (unsigned char)(((x) >> 48) & 255);                    \
+        (y)[5] = (unsigned char)(((x) >> 40) & 255);                    \
+        (y)[4] = (unsigned char)(((x) >> 32) & 255);                    \
+        (y)[3] = (unsigned char)(((x) >> 24) & 255);                    \
+        (y)[2] = (unsigned char)(((x) >> 16) & 255);                    \
+        (y)[1] = (unsigned char)(((x) >> 8) & 255);                     \
+        (y)[0] = (unsigned char)((x) & 255);                            \
+    } while (0)
+
+struct TestAES {
+    AES_KEY enc;
+    AES_KEY dec;
+};
+
+static void test_xts_aes_encrypt(const void *ctx,
+                                 size_t length,
+                                 uint8_t *dst,
+                                 const uint8_t *src)
+{
+    const struct TestAES *aesctx = ctx;
+
+    AES_encrypt(src, dst, &aesctx->enc);
+}
+
+
+static void test_xts_aes_decrypt(const void *ctx,
+                                 size_t length,
+                                 uint8_t *dst,
+                                 const uint8_t *src)
+{
+    const struct TestAES *aesctx = ctx;
+
+    AES_decrypt(src, dst, &aesctx->dec);
+}
+
+
+static void test_xts(const void *opaque)
+{
+    const QCryptoXTSTestData *data = opaque;
+    unsigned char OUT[512], Torg[16], T[16];
+    uint64_t seq;
+    int j;
+    unsigned long len;
+    struct TestAES aesdata;
+    struct TestAES aestweak;
+
+    for (j = 0; j < 2; j++) {
+        /* skip the cases where
+         * the length is smaller than 2*blocklen
+         * or the length is not a multiple of 32
+         */
+        if ((j == 1) && ((data->PTLEN < 32) || (data->PTLEN % 32))) {
+            continue;
+        }
+        len = data->PTLEN / 2;
+
+        AES_set_encrypt_key(data->key1, data->keylen / 2 * 8, &aesdata.enc);
+        AES_set_decrypt_key(data->key1, data->keylen / 2 * 8, &aesdata.dec);
+        AES_set_encrypt_key(data->key2, data->keylen / 2 * 8, &aestweak.enc);
+        AES_set_decrypt_key(data->key2, data->keylen / 2 * 8, &aestweak.dec);
+
+        seq = data->seqnum;
+        STORE64L(seq, Torg);
+        memset(Torg + 8, 0, 8);
+
+        memcpy(T, Torg, sizeof(T));
+        if (j == 0) {
+            xts_encrypt(&aesdata, &aestweak,
+                        test_xts_aes_encrypt,
+                        test_xts_aes_decrypt,
+                        T, data->PTLEN, OUT, data->PTX);
+        } else {
+            xts_encrypt(&aesdata, &aestweak,
+                        test_xts_aes_encrypt,
+                        test_xts_aes_decrypt,
+                        T, len, OUT, data->PTX);
+            xts_encrypt(&aesdata, &aestweak,
+                        test_xts_aes_encrypt,
+                        test_xts_aes_decrypt,
+                        T, len, &OUT[len], &data->PTX[len]);
+        }
+
+        g_assert(memcmp(OUT, data->CTX, data->PTLEN) == 0);
+
+        memcpy(T, Torg, sizeof(T));
+        if (j == 0) {
+            xts_decrypt(&aesdata, &aestweak,
+                        test_xts_aes_encrypt,
+                        test_xts_aes_decrypt,
+                        T, data->PTLEN, OUT, data->CTX);
+        } else {
+            xts_decrypt(&aesdata, &aestweak,
+                        test_xts_aes_encrypt,
+                        test_xts_aes_decrypt,
+                        T, len, OUT, data->CTX);
+            xts_decrypt(&aesdata, &aestweak,
+                        test_xts_aes_encrypt,
+                        test_xts_aes_decrypt,
+                        T, len, &OUT[len], &data->CTX[len]);
+        }
+
+        g_assert(memcmp(OUT, data->PTX, data->PTLEN) == 0);
+    }
+}
+
+
+int main(int argc, char **argv)
+{
+    size_t i;
+
+    g_test_init(&argc, &argv, NULL);
+
+    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_xts);
+    }
+
+    return g_test_run();
+}
