GRUB2: Cryptomount enhancements, grub.johnlane.ie

6 files changed, 1546 insertions, 0 deletions

diff --git a/resources/grub/patch/grub.johnlane.ie/0001-Cryptomount-support-LUKS-detached-header.patch b/resources/grub/patch/grub.johnlane.ie/0001-Cryptomount-support-LUKS-detached-header.patch
new file mode 100644
index 0000000..ed27dc4
--- /dev/null
+++ b/resources/grub/patch/grub.johnlane.ie/0001-Cryptomount-support-LUKS-detached-header.patch
@@ -0,0 +1,247 @@
+From 5c643ba894421ac78c3fe18ff9548d8e9fa82ed4 Mon Sep 17 00:00:00 2001
+From: John Lane <john@lane.uk.net>
+Date: Tue, 23 Jun 2015 11:16:30 +0100
+Subject: [PATCH 1/5] Cryptomount support LUKS detached header
+
+---
+ grub-core/disk/cryptodisk.c | 22 ++++++++++++++++++----
+ grub-core/disk/geli.c       |  7 +++++--
+ grub-core/disk/luks.c       | 45 +++++++++++++++++++++++++++++++++++++--------
+ include/grub/cryptodisk.h   |  5 +++--
+ 4 files changed, 63 insertions(+), 16 deletions(-)
+
+diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c
+index 82a3dcb..6f596a0 100644
+--- a/grub-core/disk/cryptodisk.c
++++ b/grub-core/disk/cryptodisk.c
+@@ -40,6 +40,7 @@ static const struct grub_arg_option options[] =
+     /* TRANSLATORS: It's still restricted to cryptodisks only.  */
+     {"all", 'a', 0, N_("Mount all."), 0, 0},
+     {"boot", 'b', 0, N_("Mount all volumes with `boot' flag set."), 0, 0},
++    {"header", 'H', 0, N_("Read LUKS header from file"), 0, ARG_TYPE_STRING},
+     {0, 0, 0, 0, 0, 0}
+   };
+ 
+@@ -803,6 +804,7 @@ grub_util_cryptodisk_get_uuid (grub_disk_t disk)
+ 
+ static int check_boot, have_it;
+ static char *search_uuid;
++static grub_file_t hdr;
+ 
+ static void
+ cryptodisk_close (grub_cryptodisk_t dev)
+@@ -827,13 +829,13 @@ grub_cryptodisk_scan_device_real (const char *name, grub_disk_t source)
+ 
+   FOR_CRYPTODISK_DEVS (cr)
+   {
+-    dev = cr->scan (source, search_uuid, check_boot);
++    dev = cr->scan (source, search_uuid, check_boot, hdr);
+     if (grub_errno)
+       return grub_errno;
+     if (!dev)
+       continue;
+     
+-    err = cr->recover_key (source, dev);
++    err = cr->recover_key (source, dev, hdr);
+     if (err)
+     {
+       cryptodisk_close (dev);
+@@ -874,7 +876,7 @@ grub_cryptodisk_cheat_mount (const char *sourcedev, const char *cheat)
+ 
+   FOR_CRYPTODISK_DEVS (cr)
+   {
+-    dev = cr->scan (source, search_uuid, check_boot);
++    dev = cr->scan (source, search_uuid, check_boot,0);
+     if (grub_errno)
+       return grub_errno;
+     if (!dev)
+@@ -928,6 +930,18 @@ grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int argc, char **args)
+   if (argc < 1 && !state[1].set && !state[2].set)
+     return grub_error (GRUB_ERR_BAD_ARGUMENT, "device name required");
+ 
++  if (state[3].set) /* LUKS detached header */
++    {
++      if (state[0].set) /* Cannot use UUID lookup with detached header */
++        return GRUB_ERR_BAD_ARGUMENT;
++
++      hdr = grub_file_open (state[3].arg);
++      if (!hdr)
++        return grub_errno;
++    }
++  else
++    hdr = NULL;
++
+   have_it = 0;
+   if (state[0].set)
+     {
+@@ -1125,7 +1139,7 @@ GRUB_MOD_INIT (cryptodisk)
+ {
+   grub_disk_dev_register (&grub_cryptodisk_dev);
+   cmd = grub_register_extcmd ("cryptomount", grub_cmd_cryptomount, 0,
+-			      N_("SOURCE|-u UUID|-a|-b"),
++			      N_("SOURCE|-u UUID|-a|-b|-H file"),
+ 			      N_("Mount a crypto device."), options);
+   grub_procfs_register ("luks_script", &luks_script);
+ }
+diff --git a/grub-core/disk/geli.c b/grub-core/disk/geli.c
+index e9d2329..f4394eb 100644
+--- a/grub-core/disk/geli.c
++++ b/grub-core/disk/geli.c
+@@ -52,6 +52,7 @@
+ #include <grub/dl.h>
+ #include <grub/err.h>
+ #include <grub/disk.h>
++#include <grub/file.h>
+ #include <grub/crypto.h>
+ #include <grub/partition.h>
+ #include <grub/i18n.h>
+@@ -243,7 +244,8 @@ grub_util_get_geli_uuid (const char *dev)
+ 
+ static grub_cryptodisk_t
+ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+-		   int boot_only)
++		   int boot_only,
++		   grub_file_t hdr __attribute__ ((unused)) )
+ {
+   grub_cryptodisk_t newdev;
+   struct grub_geli_phdr header;
+@@ -398,7 +400,8 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+ }
+ 
+ static grub_err_t
+-recover_key (grub_disk_t source, grub_cryptodisk_t dev)
++recover_key (grub_disk_t source, grub_cryptodisk_t dev,
++	     grub_file_t hdr __attribute__ ((unused)) )
+ {
+   grub_size_t keysize;
+   grub_uint8_t digest[GRUB_CRYPTO_MAX_MDLEN];
+diff --git a/grub-core/disk/luks.c b/grub-core/disk/luks.c
+index 86c50c6..66e64c0 100644
+--- a/grub-core/disk/luks.c
++++ b/grub-core/disk/luks.c
+@@ -23,6 +23,7 @@
+ #include <grub/dl.h>
+ #include <grub/err.h>
+ #include <grub/disk.h>
++#include <grub/file.h>
+ #include <grub/crypto.h>
+ #include <grub/partition.h>
+ #include <grub/i18n.h>
+@@ -66,7 +67,7 @@ gcry_err_code_t AF_merge (const gcry_md_spec_t * hash, grub_uint8_t * src,
+ 
+ static grub_cryptodisk_t
+ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+-		   int check_boot)
++		   int check_boot, grub_file_t hdr)
+ {
+   grub_cryptodisk_t newdev;
+   const char *iptr;
+@@ -86,11 +87,21 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+   int benbi_log = 0;
+   grub_err_t err;
+ 
++  err = GRUB_ERR_NONE;
++
+   if (check_boot)
+     return NULL;
+ 
+   /* Read the LUKS header.  */
+-  err = grub_disk_read (disk, 0, 0, sizeof (header), &header);
++  if (hdr)
++  {
++    grub_file_seek (hdr, 0);
++    if (grub_file_read (hdr, &header, sizeof (header)) != sizeof (header))
++        err = GRUB_ERR_READ_ERROR;
++  }
++  else
++    err = grub_disk_read (disk, 0, 0, sizeof (header), &header);
++
+   if (err)
+     {
+       if (err == GRUB_ERR_OUT_OF_RANGE)
+@@ -304,12 +315,14 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+   grub_memcpy (newdev->uuid, uuid, sizeof (newdev->uuid));
+   newdev->modname = "luks";
+   COMPILE_TIME_ASSERT (sizeof (newdev->uuid) >= sizeof (uuid));
++
+   return newdev;
+ }
+ 
+ static grub_err_t
+ luks_recover_key (grub_disk_t source,
+-		  grub_cryptodisk_t dev)
++		  grub_cryptodisk_t dev,
++	          grub_file_t hdr)
+ {
+   struct grub_luks_phdr header;
+   grub_size_t keysize;
+@@ -321,8 +334,19 @@ luks_recover_key (grub_disk_t source,
+   grub_err_t err;
+   grub_size_t max_stripes = 1;
+   char *tmp;
++  grub_uint32_t sector;
++
++  err = GRUB_ERR_NONE;
++
++  if (hdr)
++  {
++    grub_file_seek (hdr, 0);
++    if (grub_file_read (hdr, &header, sizeof (header)) != sizeof (header))
++        err = GRUB_ERR_READ_ERROR;
++  }
++  else
++    err = grub_disk_read (source, 0, 0, sizeof (header), &header);
+ 
+-  err = grub_disk_read (source, 0, 0, sizeof (header), &header);
+   if (err)
+     return err;
+ 
+@@ -391,13 +415,18 @@ luks_recover_key (grub_disk_t source,
+ 	  return grub_crypto_gcry_error (gcry_err);
+ 	}
+ 
++      sector = grub_be_to_cpu32 (header.keyblock[i].keyMaterialOffset);
+       length = (keysize * grub_be_to_cpu32 (header.keyblock[i].stripes));
+ 
+       /* Read and decrypt the key material from the disk.  */
+-      err = grub_disk_read (source,
+-			    grub_be_to_cpu32 (header.keyblock
+-					      [i].keyMaterialOffset), 0,
+-			    length, split_key);
++      if (hdr)
++        {
++	  grub_file_seek (hdr, sector * 512);
++          if (grub_file_read (hdr, split_key, length) != (grub_ssize_t)length)
++            err = GRUB_ERR_READ_ERROR;
++        }
++      else
++        err = grub_disk_read (source, sector, 0, length, split_key);
+       if (err)
+ 	{
+ 	  grub_free (split_key);
+diff --git a/include/grub/cryptodisk.h b/include/grub/cryptodisk.h
+index f2ad2a7..16dee3c 100644
+--- a/include/grub/cryptodisk.h
++++ b/include/grub/cryptodisk.h
+@@ -20,6 +20,7 @@
+ #define GRUB_CRYPTODISK_HEADER	1
+ 
+ #include <grub/disk.h>
++#include <grub/file.h>
+ #include <grub/crypto.h>
+ #include <grub/list.h>
+ #ifdef GRUB_UTIL
+@@ -106,8 +107,8 @@ struct grub_cryptodisk_dev
+   struct grub_cryptodisk_dev **prev;
+ 
+   grub_cryptodisk_t (*scan) (grub_disk_t disk, const char *check_uuid,
+-			     int boot_only);
+-  grub_err_t (*recover_key) (grub_disk_t disk, grub_cryptodisk_t dev);
++			     int boot_only, grub_file_t hdr);
++  grub_err_t (*recover_key) (grub_disk_t disk, grub_cryptodisk_t dev, grub_file_t hdr);
+ };
+ typedef struct grub_cryptodisk_dev *grub_cryptodisk_dev_t;
+ 
+-- 
+2.1.2
+
diff --git a/resources/grub/patch/grub.johnlane.ie/0002-Cryptomount-support-key-files.patch b/resources/grub/patch/grub.johnlane.ie/0002-Cryptomount-support-key-files.patch
new file mode 100644
index 0000000..c4302e8
--- /dev/null
+++ b/resources/grub/patch/grub.johnlane.ie/0002-Cryptomount-support-key-files.patch
@@ -0,0 +1,205 @@
+From 802a23fc503a3c09f167883f05c759471243b4d3 Mon Sep 17 00:00:00 2001
+From: John Lane <john@lane.uk.net>
+Date: Fri, 26 Jun 2015 13:37:10 +0100
+Subject: [PATCH 2/5] Cryptomount support key files
+
+---
+ grub-core/disk/cryptodisk.c | 46 ++++++++++++++++++++++++++++++++++++++++++++-
+ grub-core/disk/geli.c       |  4 +++-
+ grub-core/disk/luks.c       | 44 +++++++++++++++++++++++++++++--------------
+ include/grub/cryptodisk.h   |  5 ++++-
+ 4 files changed, 82 insertions(+), 17 deletions(-)
+
+diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c
+index 6f596a0..a27e70c 100644
+--- a/grub-core/disk/cryptodisk.c
++++ b/grub-core/disk/cryptodisk.c
+@@ -41,6 +41,9 @@ static const struct grub_arg_option options[] =
+     {"all", 'a', 0, N_("Mount all."), 0, 0},
+     {"boot", 'b', 0, N_("Mount all volumes with `boot' flag set."), 0, 0},
+     {"header", 'H', 0, N_("Read LUKS header from file"), 0, ARG_TYPE_STRING},
++    {"keyfile", 'k', 0, N_("Key file"), 0, ARG_TYPE_STRING},
++    {"keyfile-offset", 'O', 0, N_("Key file offset (bytes)"), 0, ARG_TYPE_INT},
++    {"keyfile-size", 'S', 0, N_("Key file data size (bytes)"), 0, ARG_TYPE_INT},
+     {0, 0, 0, 0, 0, 0}
+   };
+ 
+@@ -805,6 +808,8 @@ grub_util_cryptodisk_get_uuid (grub_disk_t disk)
+ static int check_boot, have_it;
+ static char *search_uuid;
+ static grub_file_t hdr;
++static grub_uint8_t *key, keyfile_buffer[GRUB_CRYPTODISK_MAX_KEYFILE_SIZE];
++static grub_size_t keyfile_size;
+ 
+ static void
+ cryptodisk_close (grub_cryptodisk_t dev)
+@@ -835,7 +840,7 @@ grub_cryptodisk_scan_device_real (const char *name, grub_disk_t source)
+     if (!dev)
+       continue;
+     
+-    err = cr->recover_key (source, dev, hdr);
++    err = cr->recover_key (source, dev, hdr, key, keyfile_size);
+     if (err)
+     {
+       cryptodisk_close (dev);
+@@ -943,6 +948,45 @@ grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int argc, char **args)
+     hdr = NULL;
+ 
+   have_it = 0;
++  key = NULL;
++
++  if (state[4].set) /* Key file; fails back to passphrase entry */
++    {
++      grub_file_t keyfile;
++      int keyfile_offset;
++      grub_size_t requested_keyfile_size;
++
++      requested_keyfile_size = state[6].set ? grub_strtoul(state[6].arg, 0, 0) : 0;
++
++      if (requested_keyfile_size > GRUB_CRYPTODISK_MAX_KEYFILE_SIZE)
++        grub_printf (N_("Key file size exceeds maximum (%llu)\n"), \
++	                     (unsigned long long) GRUB_CRYPTODISK_MAX_KEYFILE_SIZE);
++      else
++        {
++          keyfile_offset = state[5].set ? grub_strtoul (state[5].arg, 0, 0) : 0;
++          keyfile_size = requested_keyfile_size ? requested_keyfile_size : \
++		                             GRUB_CRYPTODISK_MAX_KEYFILE_SIZE;
++
++          keyfile = grub_file_open (state[4].arg);
++          if (!keyfile)
++            grub_printf (N_("Unable to open key file %s\n"), state[4].arg);
++          else if (grub_file_seek (keyfile, keyfile_offset) == (grub_off_t)-1)
++            grub_printf (N_("Unable to seek to offset %d in key file\n"), keyfile_offset);
++          else
++            {
++              keyfile_size = grub_file_read (keyfile, keyfile_buffer, keyfile_size);
++              if (keyfile_size == (grub_size_t)-1)
++                 grub_printf (N_("Error reading key file\n"));
++	      else if (requested_keyfile_size && (keyfile_size != requested_keyfile_size))
++                 grub_printf (N_("Cannot read %llu bytes for key file (read %llu bytes)\n"),
++                                                (unsigned long long) requested_keyfile_size,
++						(unsigned long long) keyfile_size);
++              else
++                key = keyfile_buffer;
++	    }
++        }
++    }
++
+   if (state[0].set)
+     {
+       grub_cryptodisk_t dev;
+diff --git a/grub-core/disk/geli.c b/grub-core/disk/geli.c
+index f4394eb..da6aa6a 100644
+--- a/grub-core/disk/geli.c
++++ b/grub-core/disk/geli.c
+@@ -401,7 +401,9 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+ 
+ static grub_err_t
+ recover_key (grub_disk_t source, grub_cryptodisk_t dev,
+-	     grub_file_t hdr __attribute__ ((unused)) )
++	     grub_file_t hdr __attribute__ ((unused)),
++	     grub_uint8_t *key __attribute__ ((unused)),
++	     grub_size_t keyfile_size __attribute__ ((unused)) )
+ {
+   grub_size_t keysize;
+   grub_uint8_t digest[GRUB_CRYPTO_MAX_MDLEN];
+diff --git a/grub-core/disk/luks.c b/grub-core/disk/luks.c
+index 66e64c0..5882368 100644
+--- a/grub-core/disk/luks.c
++++ b/grub-core/disk/luks.c
+@@ -322,12 +322,16 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+ static grub_err_t
+ luks_recover_key (grub_disk_t source,
+ 		  grub_cryptodisk_t dev,
+-	          grub_file_t hdr)
++		  grub_file_t hdr,
++		  grub_uint8_t *keyfile_bytes,
++		  grub_size_t keyfile_bytes_size)
+ {
+   struct grub_luks_phdr header;
+   grub_size_t keysize;
+   grub_uint8_t *split_key = NULL;
+-  char passphrase[MAX_PASSPHRASE] = "";
++  char interactive_passphrase[MAX_PASSPHRASE] = "";
++  grub_uint8_t *passphrase;
++  grub_size_t passphrase_length;
+   grub_uint8_t candidate_digest[sizeof (header.mkDigest)];
+   unsigned i;
+   grub_size_t length;
+@@ -364,18 +368,30 @@ luks_recover_key (grub_disk_t source,
+   if (!split_key)
+     return grub_errno;
+ 
+-  /* Get the passphrase from the user.  */
+-  tmp = NULL;
+-  if (source->partition)
+-    tmp = grub_partition_get_name (source->partition);
+-  grub_printf_ (N_("Enter passphrase for %s%s%s (%s): "), source->name,
+-	       source->partition ? "," : "", tmp ? : "",
+-	       dev->uuid);
+-  grub_free (tmp);
+-  if (!grub_password_get (passphrase, MAX_PASSPHRASE))
++  if (keyfile_bytes)
+     {
+-      grub_free (split_key);
+-      return grub_error (GRUB_ERR_BAD_ARGUMENT, "Passphrase not supplied");
++      /* Use bytestring from key file as passphrase */
++      passphrase = keyfile_bytes;
++      passphrase_length = keyfile_bytes_size;
++    }
++  else
++    {
++      /* Get the passphrase from the user.  */
++      tmp = NULL;
++      if (source->partition)
++        tmp = grub_partition_get_name (source->partition);
++      grub_printf_ (N_("Enter passphrase for %s%s%s (%s): "), source->name,
++		    source->partition ? "," : "", tmp ? : "", dev->uuid);
++      grub_free (tmp);
++      if (!grub_password_get (interactive_passphrase, MAX_PASSPHRASE))
++        {
++          grub_free (split_key);
++          return grub_error (GRUB_ERR_BAD_ARGUMENT, "Passphrase not supplied");
++        }
++
++      passphrase = (grub_uint8_t *)interactive_passphrase;
++      passphrase_length = grub_strlen (interactive_passphrase);
++
+     }
+ 
+   /* Try to recover master key from each active keyslot.  */
+@@ -393,7 +409,7 @@ luks_recover_key (grub_disk_t source,
+ 
+       /* Calculate the PBKDF2 of the user supplied passphrase.  */
+       gcry_err = grub_crypto_pbkdf2 (dev->hash, (grub_uint8_t *) passphrase,
+-				     grub_strlen (passphrase),
++				     passphrase_length,
+ 				     header.keyblock[i].passwordSalt,
+ 				     sizeof (header.keyblock[i].passwordSalt),
+ 				     grub_be_to_cpu32 (header.keyblock[i].
+diff --git a/include/grub/cryptodisk.h b/include/grub/cryptodisk.h
+index 16dee3c..0299625 100644
+--- a/include/grub/cryptodisk.h
++++ b/include/grub/cryptodisk.h
+@@ -55,6 +55,8 @@ typedef enum
+ #define GRUB_CRYPTODISK_GF_BYTES (1U << GRUB_CRYPTODISK_GF_LOG_BYTES)
+ #define GRUB_CRYPTODISK_MAX_KEYLEN 128
+ 
++#define GRUB_CRYPTODISK_MAX_KEYFILE_SIZE 8192
++
+ struct grub_cryptodisk;
+ 
+ typedef gcry_err_code_t
+@@ -108,7 +110,8 @@ struct grub_cryptodisk_dev
+ 
+   grub_cryptodisk_t (*scan) (grub_disk_t disk, const char *check_uuid,
+ 			     int boot_only, grub_file_t hdr);
+-  grub_err_t (*recover_key) (grub_disk_t disk, grub_cryptodisk_t dev, grub_file_t hdr);
++  grub_err_t (*recover_key) (grub_disk_t disk, grub_cryptodisk_t dev,
++			    grub_file_t hdr, grub_uint8_t *key, grub_size_t keyfile_size);
+ };
+ typedef struct grub_cryptodisk_dev *grub_cryptodisk_dev_t;
+ 
+-- 
+2.1.2
+
diff --git a/resources/grub/patch/grub.johnlane.ie/0003-Cryptomount-luks-allow-multiple-passphrase-attempts.patch b/resources/grub/patch/grub.johnlane.ie/0003-Cryptomount-luks-allow-multiple-passphrase-attempts.patch
new file mode 100644
index 0000000..5ed8b27
--- /dev/null
+++ b/resources/grub/patch/grub.johnlane.ie/0003-Cryptomount-luks-allow-multiple-passphrase-attempts.patch
@@ -0,0 +1,329 @@
+From 3e2ffefe1edbbd874ca18ac397a14465d1ac49be Mon Sep 17 00:00:00 2001
+From: John Lane <john@lane.uk.net>
+Date: Fri, 26 Jun 2015 13:49:58 +0100
+Subject: [PATCH 3/5] Cryptomount luks allow multiple passphrase attempts
+
+---
+ grub-core/disk/luks.c | 278 ++++++++++++++++++++++++++------------------------
+ 1 file changed, 143 insertions(+), 135 deletions(-)
+
+diff --git a/grub-core/disk/luks.c b/grub-core/disk/luks.c
+index 5882368..11e437e 100644
+--- a/grub-core/disk/luks.c
++++ b/grub-core/disk/luks.c
+@@ -321,10 +321,10 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+ 
+ static grub_err_t
+ luks_recover_key (grub_disk_t source,
+-		  grub_cryptodisk_t dev,
+-		  grub_file_t hdr,
+-		  grub_uint8_t *keyfile_bytes,
+-		  grub_size_t keyfile_bytes_size)
++                  grub_cryptodisk_t dev,
++                  grub_file_t hdr,
++                  grub_uint8_t *keyfile_bytes,
++                  grub_size_t keyfile_bytes_size)
+ {
+   struct grub_luks_phdr header;
+   grub_size_t keysize;
+@@ -339,6 +339,7 @@ luks_recover_key (grub_disk_t source,
+   grub_size_t max_stripes = 1;
+   char *tmp;
+   grub_uint32_t sector;
++  unsigned attempts = 2;
+ 
+   err = GRUB_ERR_NONE;
+ 
+@@ -361,151 +362,158 @@ luks_recover_key (grub_disk_t source,
+ 
+   for (i = 0; i < ARRAY_SIZE (header.keyblock); i++)
+     if (grub_be_to_cpu32 (header.keyblock[i].active) == LUKS_KEY_ENABLED
+-	&& grub_be_to_cpu32 (header.keyblock[i].stripes) > max_stripes)
++        && grub_be_to_cpu32 (header.keyblock[i].stripes) > max_stripes)
+       max_stripes = grub_be_to_cpu32 (header.keyblock[i].stripes);
+ 
+   split_key = grub_malloc (keysize * max_stripes);
+   if (!split_key)
+     return grub_errno;
+ 
+-  if (keyfile_bytes)
++  while (attempts)
+     {
+-      /* Use bytestring from key file as passphrase */
+-      passphrase = keyfile_bytes;
+-      passphrase_length = keyfile_bytes_size;
+-    }
+-  else
+-    {
+-      /* Get the passphrase from the user.  */
+-      tmp = NULL;
+-      if (source->partition)
+-        tmp = grub_partition_get_name (source->partition);
+-      grub_printf_ (N_("Enter passphrase for %s%s%s (%s): "), source->name,
+-		    source->partition ? "," : "", tmp ? : "", dev->uuid);
+-      grub_free (tmp);
+-      if (!grub_password_get (interactive_passphrase, MAX_PASSPHRASE))
++      if (keyfile_bytes)
+         {
+-          grub_free (split_key);
+-          return grub_error (GRUB_ERR_BAD_ARGUMENT, "Passphrase not supplied");
+-        }
+-
+-      passphrase = (grub_uint8_t *)interactive_passphrase;
+-      passphrase_length = grub_strlen (interactive_passphrase);
+-
+-    }
+-
+-  /* Try to recover master key from each active keyslot.  */
+-  for (i = 0; i < ARRAY_SIZE (header.keyblock); i++)
+-    {
+-      gcry_err_code_t gcry_err;
+-      grub_uint8_t candidate_key[GRUB_CRYPTODISK_MAX_KEYLEN];
+-      grub_uint8_t digest[GRUB_CRYPTODISK_MAX_KEYLEN];
+-
+-      /* Check if keyslot is enabled.  */
+-      if (grub_be_to_cpu32 (header.keyblock[i].active) != LUKS_KEY_ENABLED)
+-	continue;
+-
+-      grub_dprintf ("luks", "Trying keyslot %d\n", i);
+-
+-      /* Calculate the PBKDF2 of the user supplied passphrase.  */
+-      gcry_err = grub_crypto_pbkdf2 (dev->hash, (grub_uint8_t *) passphrase,
+-				     passphrase_length,
+-				     header.keyblock[i].passwordSalt,
+-				     sizeof (header.keyblock[i].passwordSalt),
+-				     grub_be_to_cpu32 (header.keyblock[i].
+-						       passwordIterations),
+-				     digest, keysize);
+-
+-      if (gcry_err)
+-	{
+-	  grub_free (split_key);
+-	  return grub_crypto_gcry_error (gcry_err);
+-	}
+-
+-      grub_dprintf ("luks", "PBKDF2 done\n");
+-
+-      gcry_err = grub_cryptodisk_setkey (dev, digest, keysize); 
+-      if (gcry_err)
+-	{
+-	  grub_free (split_key);
+-	  return grub_crypto_gcry_error (gcry_err);
+-	}
+-
+-      sector = grub_be_to_cpu32 (header.keyblock[i].keyMaterialOffset);
+-      length = (keysize * grub_be_to_cpu32 (header.keyblock[i].stripes));
+-
+-      /* Read and decrypt the key material from the disk.  */
+-      if (hdr)
+-        {
+-	  grub_file_seek (hdr, sector * 512);
+-          if (grub_file_read (hdr, split_key, length) != (grub_ssize_t)length)
+-            err = GRUB_ERR_READ_ERROR;
++          /* Use bytestring from key file as passphrase */
++          passphrase = keyfile_bytes;
++          passphrase_length = keyfile_bytes_size;
++	  keyfile_bytes = NULL; /* use it only once */
+         }
+       else
+-        err = grub_disk_read (source, sector, 0, length, split_key);
+-      if (err)
+-	{
+-	  grub_free (split_key);
+-	  return err;
+-	}
+-
+-      gcry_err = grub_cryptodisk_decrypt (dev, split_key, length, 0);
+-      if (gcry_err)
+-	{
+-	  grub_free (split_key);
+-	  return grub_crypto_gcry_error (gcry_err);
+-	}
+-
+-      /* Merge the decrypted key material to get the candidate master key.  */
+-      gcry_err = AF_merge (dev->hash, split_key, candidate_key, keysize,
+-			   grub_be_to_cpu32 (header.keyblock[i].stripes));
+-      if (gcry_err)
+-	{
+-	  grub_free (split_key);
+-	  return grub_crypto_gcry_error (gcry_err);
+-	}
+-
+-      grub_dprintf ("luks", "candidate key recovered\n");
+-
+-      /* Calculate the PBKDF2 of the candidate master key.  */
+-      gcry_err = grub_crypto_pbkdf2 (dev->hash, candidate_key,
+-				     grub_be_to_cpu32 (header.keyBytes),
+-				     header.mkDigestSalt,
+-				     sizeof (header.mkDigestSalt),
+-				     grub_be_to_cpu32
+-				     (header.mkDigestIterations),
+-				     candidate_digest,
+-				     sizeof (candidate_digest));
+-      if (gcry_err)
+-	{
+-	  grub_free (split_key);
+-	  return grub_crypto_gcry_error (gcry_err);
+-	}
+-
+-      /* Compare the calculated PBKDF2 to the digest stored
+-         in the header to see if it's correct.  */
+-      if (grub_memcmp (candidate_digest, header.mkDigest,
+-		       sizeof (header.mkDigest)) != 0)
+-	{
+-	  grub_dprintf ("luks", "bad digest\n");
+-	  continue;
+-	}
++        {
++          /* Get the passphrase from the user.  */
++          tmp = NULL;
++          if (source->partition)
++            tmp = grub_partition_get_name (source->partition);
++          grub_printf_ (N_("Enter passphrase for %s%s%s (%s): "), source->name,
++                              source->partition ? "," : "", tmp ? : "", dev->uuid);
++          grub_free (tmp);
++          if (!grub_password_get (interactive_passphrase, MAX_PASSPHRASE))
++            {
++              grub_free (split_key);
++              return grub_error (GRUB_ERR_BAD_ARGUMENT, "Passphrase not supplied");
++            }
++
++          passphrase = (grub_uint8_t *)interactive_passphrase;
++          passphrase_length = grub_strlen (interactive_passphrase);
+ 
+-      /* TRANSLATORS: It's a cryptographic key slot: one element of an array
+-	 where each element is either empty or holds a key.  */
+-      grub_printf_ (N_("Slot %d opened\n"), i);
++        }
+ 
+-      /* Set the master key.  */
+-      gcry_err = grub_cryptodisk_setkey (dev, candidate_key, keysize); 
+-      if (gcry_err)
+-	{
+-	  grub_free (split_key);
+-	  return grub_crypto_gcry_error (gcry_err);
+-	}
++      /* Try to recover master key from each active keyslot.  */
++      for (i = 0; i < ARRAY_SIZE (header.keyblock); i++)
++        {
++          gcry_err_code_t gcry_err;
++          grub_uint8_t candidate_key[GRUB_CRYPTODISK_MAX_KEYLEN];
++          grub_uint8_t digest[GRUB_CRYPTODISK_MAX_KEYLEN];
++
++          /* Check if keyslot is enabled.  */
++          if (grub_be_to_cpu32 (header.keyblock[i].active) != LUKS_KEY_ENABLED)
++            continue;
++
++          grub_dprintf ("luks", "Trying keyslot %d\n", i);
++
++          /* Calculate the PBKDF2 of the user supplied passphrase.  */
++          gcry_err = grub_crypto_pbkdf2 (dev->hash, (grub_uint8_t *) passphrase,
++                                         passphrase_length,
++                                         header.keyblock[i].passwordSalt,
++                                         sizeof (header.keyblock[i].passwordSalt),
++                                         grub_be_to_cpu32 (header.keyblock[i].
++                                         passwordIterations),
++                                         digest, keysize);
++
++          if (gcry_err)
++            {
++              grub_free (split_key);
++              return grub_crypto_gcry_error (gcry_err);
++            }
++
++          grub_dprintf ("luks", "PBKDF2 done\n");
++
++          gcry_err = grub_cryptodisk_setkey (dev, digest, keysize);
++          if (gcry_err)
++            {
++              grub_free (split_key);
++              return grub_crypto_gcry_error (gcry_err);
++            }
++
++          sector = grub_be_to_cpu32 (header.keyblock[i].keyMaterialOffset);
++          length = (keysize * grub_be_to_cpu32 (header.keyblock[i].stripes));
++
++          /* Read and decrypt the key material from the disk.  */
++          if (hdr)
++            {
++              grub_file_seek (hdr, sector * 512);
++              if (grub_file_read (hdr, split_key, length) != (grub_ssize_t)length)
++                err = GRUB_ERR_READ_ERROR;
++            }
++          else
++            err = grub_disk_read (source, sector, 0, length, split_key);
++          if (err)
++            {
++              grub_free (split_key);
++              return err;
++            }
++
++          gcry_err = grub_cryptodisk_decrypt (dev, split_key, length, 0);
++          if (gcry_err)
++            {
++              grub_free (split_key);
++              return grub_crypto_gcry_error (gcry_err);
++            }
++
++          /* Merge the decrypted key material to get the candidate master key.  */
++          gcry_err = AF_merge (dev->hash, split_key, candidate_key, keysize,
++                               grub_be_to_cpu32 (header.keyblock[i].stripes));
++          if (gcry_err)
++            {
++              grub_free (split_key);
++              return grub_crypto_gcry_error (gcry_err);
++            }
++
++          grub_dprintf ("luks", "candidate key recovered\n");
++
++          /* Calculate the PBKDF2 of the candidate master key.  */
++          gcry_err = grub_crypto_pbkdf2 (dev->hash, candidate_key,
++                                     grub_be_to_cpu32 (header.keyBytes),
++                                     header.mkDigestSalt,
++                                     sizeof (header.mkDigestSalt),
++                                     grub_be_to_cpu32
++                                     (header.mkDigestIterations),
++                                     candidate_digest,
++                                     sizeof (candidate_digest));
++          if (gcry_err)
++            {
++              grub_free (split_key);
++              return grub_crypto_gcry_error (gcry_err);
++            }
++
++          /* Compare the calculated PBKDF2 to the digest stored
++             in the header to see if it's correct.  */
++          if (grub_memcmp (candidate_digest, header.mkDigest,
++                                             sizeof (header.mkDigest)) != 0)
++            {
++              grub_dprintf ("luks", "bad digest\n");
++              continue;
++            }
++
++          /* TRANSLATORS: It's a cryptographic key slot: one element of an array
++             where each element is either empty or holds a key.  */
++          grub_printf_ (N_("Slot %d opened\n"), i);
++
++          /* Set the master key.  */
++          gcry_err = grub_cryptodisk_setkey (dev, candidate_key, keysize);
++          if (gcry_err)
++            {
++              grub_free (split_key);
++              return grub_crypto_gcry_error (gcry_err);
++            }
+ 
+-      grub_free (split_key);
++          grub_free (split_key);
+ 
+-      return GRUB_ERR_NONE;
++          return GRUB_ERR_NONE;
++        }
++      grub_printf_ (N_("Failed to decrypt master key.\n"));
++      if (--attempts) grub_printf_ (N_("%u attempt%s remaining.\n"), attempts,
++		                    (attempts==1) ? "" : "s");
+     }
+ 
+   grub_free (split_key);
+-- 
+2.1.2
+
diff --git a/resources/grub/patch/grub.johnlane.ie/0004-Cryptomount-support-plain-dm-crypt.patch b/resources/grub/patch/grub.johnlane.ie/0004-Cryptomount-support-plain-dm-crypt.patch
new file mode 100644
index 0000000..c8ee671
--- /dev/null
+++ b/resources/grub/patch/grub.johnlane.ie/0004-Cryptomount-support-plain-dm-crypt.patch
@@ -0,0 +1,636 @@
+From c584bacaad58facb9124df26f98fff2542f7237a Mon Sep 17 00:00:00 2001
+From: John Lane <john@lane.uk.net>
+Date: Fri, 26 Jun 2015 22:09:52 +0100
+Subject: [PATCH 4/5] Cryptomount support plain dm-crypt
+
+---
+ grub-core/disk/cryptodisk.c | 298 +++++++++++++++++++++++++++++++++++++++++++-
+ grub-core/disk/luks.c       | 195 +----------------------------
+ include/grub/cryptodisk.h   |   8 ++
+ 3 files changed, 310 insertions(+), 191 deletions(-)
+
+diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c
+index a27e70c..cd5cfc9 100644
+--- a/grub-core/disk/cryptodisk.c
++++ b/grub-core/disk/cryptodisk.c
+@@ -44,6 +44,12 @@ static const struct grub_arg_option options[] =
+     {"keyfile", 'k', 0, N_("Key file"), 0, ARG_TYPE_STRING},
+     {"keyfile-offset", 'O', 0, N_("Key file offset (bytes)"), 0, ARG_TYPE_INT},
+     {"keyfile-size", 'S', 0, N_("Key file data size (bytes)"), 0, ARG_TYPE_INT},
++    {"plain", 'p', 0, N_("Plain (no LUKS header)"), 0, ARG_TYPE_NONE},
++    {"cipher", 'c', 0, N_("Plain mode cipher"), 0, ARG_TYPE_STRING},
++    {"digest", 'd', 0, N_("Plain mode passphrase digest (hash)"), 0, ARG_TYPE_STRING},
++    {"offset", 'o', 0, N_("Plain mode data sector offset"), 0, ARG_TYPE_INT},
++    {"size", 's', 0, N_("Size of raw device (sectors, defaults to whole device)"), 0, ARG_TYPE_INT},
++    {"key-size", 'K', 0, N_("Set key size (bits)"), 0, ARG_TYPE_INT},
+     {0, 0, 0, 0, 0, 0}
+   };
+ 
+@@ -927,6 +933,48 @@ grub_cryptodisk_scan_device (const char *name,
+   return have_it && search_uuid ? 1 : 0;
+ }
+ 
++/* Hashes a passphrase into a key and stores it with cipher. */
++static gcry_err_code_t
++set_passphrase (grub_cryptodisk_t dev, grub_size_t keysize, const char *passphrase)
++{
++  grub_uint8_t derived_hash[GRUB_CRYPTODISK_MAX_KEYLEN * 2], *dh = derived_hash;
++  char *p;
++  unsigned int round, i;
++  unsigned int len, size;
++
++  /* Need no passphrase if there's no key */
++  if (keysize == 0)
++    return GPG_ERR_INV_KEYLEN;
++
++  /* Hack to support the "none" hash */
++  if (dev->hash)
++    len = dev->hash->mdlen;
++  else
++    len = grub_strlen (passphrase);
++
++  if (keysize > GRUB_CRYPTODISK_MAX_KEYLEN || len > GRUB_CRYPTODISK_MAX_KEYLEN)
++    return GPG_ERR_INV_KEYLEN;
++
++  p = grub_malloc (grub_strlen (passphrase) + 2 + keysize / len);
++  if (!p)
++    return grub_errno;
++
++  for (round = 0, size = keysize; size; round++, dh += len, size -= len)
++    {
++      for (i = 0; i < round; i++)
++	p[i] = 'A';
++
++      grub_strcpy (p + i, passphrase);
++
++      if (len > size)
++	len = size;
++
++      grub_crypto_hash (dev->hash, dh, p, grub_strlen (p));
++    }
++
++  return grub_cryptodisk_setkey (dev, derived_hash, keysize);
++}
++
+ static grub_err_t
+ grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int argc, char **args)
+ {
+@@ -1046,7 +1094,63 @@ grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int argc, char **args)
+ 	  return GRUB_ERR_NONE;
+ 	}
+ 
+-      err = grub_cryptodisk_scan_device_real (args[0], disk);
++      if (state[7].set) /* Plain mode */
++        {
++          char *cipher;
++          char *mode;
++          char *digest;
++          int offset, size, key_size;
++
++          cipher = grub_strdup (state[8].set ? state[8].arg : GRUB_CRYPTODISK_PLAIN_CIPHER);
++          digest = grub_strdup (state[9].set ? state[9].arg : GRUB_CRYPTODISK_PLAIN_DIGEST);
++          offset = state[10].set ? grub_strtoul (state[10].arg, 0, 0) : 0;
++          size   = state[11].set ? grub_strtoul (state[11].arg, 0, 0) : 0;
++          key_size = ( state[12].set ? grub_strtoul (state[12].arg, 0, 0) \
++			             : GRUB_CRYPTODISK_PLAIN_KEYSIZE ) / 8;
++
++          /* no strtok, do it manually */
++          mode = grub_strchr(cipher,'-');
++          if (!mode)
++            return GRUB_ERR_BAD_ARGUMENT;
++          else
++            *mode++ = 0;
++
++          dev = grub_cryptodisk_create (disk, NULL, cipher, mode, digest);
++
++          dev->offset = offset;
++	  if (size) dev->total_length = size;
++
++          if (key)
++	    {
++              err = grub_cryptodisk_setkey (dev, key, key_size);
++              if (err)
++                return err;
++	    }
++	  else
++	    {
++              char passphrase[GRUB_CRYPTODISK_MAX_PASSPHRASE] = "";
++
++              grub_printf_ (N_("Enter passphrase for %s: "), diskname);
++              if (!grub_password_get (passphrase, GRUB_CRYPTODISK_MAX_PASSPHRASE))
++                return grub_error (GRUB_ERR_BAD_ARGUMENT, "Passphrase not supplied");
++
++              err = set_passphrase (dev, key_size, passphrase);
++              if (err)
++                {
++                  grub_crypto_cipher_close (dev->cipher);
++                  return err;
++                }
++	    }
++
++          grub_cryptodisk_insert (dev, diskname, disk);
++
++          grub_free (cipher);
++          grub_free (digest);
++
++          err = GRUB_ERR_NONE;
++        }
++      else
++        err = grub_cryptodisk_scan_device_real (args[0], disk);
+ 
+       grub_disk_close (disk);
+ 
+@@ -1177,13 +1281,203 @@ struct grub_procfs_entry luks_script =
+   .get_contents = luks_script_get
+ };
+ 
++grub_cryptodisk_t
++grub_cryptodisk_create (grub_disk_t disk, char *uuid,
++		   char *ciphername, char *ciphermode, char *hashspec)
++{
++  grub_cryptodisk_t newdev;
++  char *cipheriv = NULL;
++  grub_crypto_cipher_handle_t cipher = NULL, secondary_cipher = NULL;
++  grub_crypto_cipher_handle_t essiv_cipher = NULL;
++  const gcry_md_spec_t *hash = NULL, *essiv_hash = NULL;
++  const struct gcry_cipher_spec *ciph;
++  grub_cryptodisk_mode_t mode;
++  grub_cryptodisk_mode_iv_t mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN64;
++  int benbi_log = 0;
++
++  if (!uuid)
++    uuid = (char*)"00000000000000000000000000000000";
++
++  ciph = grub_crypto_lookup_cipher_by_name (ciphername);
++  if (!ciph)
++    {
++      grub_error (GRUB_ERR_FILE_NOT_FOUND, "Cipher %s isn't available",
++		  ciphername);
++      return NULL;
++    }
++
++  /* Configure the cipher used for the bulk data.  */
++  cipher = grub_crypto_cipher_open (ciph);
++  if (!cipher)
++    return NULL;
++
++  /* Configure the cipher mode.  */
++  if (grub_strcmp (ciphermode, "ecb") == 0)
++    {
++      mode = GRUB_CRYPTODISK_MODE_ECB;
++      mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN;
++      cipheriv = NULL;
++    }
++  else if (grub_strcmp (ciphermode, "plain") == 0)
++    {
++      mode = GRUB_CRYPTODISK_MODE_CBC;
++      mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN;
++      cipheriv = NULL;
++    }
++  else if (grub_memcmp (ciphermode, "cbc-", sizeof ("cbc-") - 1) == 0)
++    {
++      mode = GRUB_CRYPTODISK_MODE_CBC;
++      cipheriv = ciphermode + sizeof ("cbc-") - 1;
++    }
++  else if (grub_memcmp (ciphermode, "pcbc-", sizeof ("pcbc-") - 1) == 0)
++    {
++      mode = GRUB_CRYPTODISK_MODE_PCBC;
++      cipheriv = ciphermode + sizeof ("pcbc-") - 1;
++    }
++  else if (grub_memcmp (ciphermode, "xts-", sizeof ("xts-") - 1) == 0)
++    {
++      mode = GRUB_CRYPTODISK_MODE_XTS;
++      cipheriv = ciphermode + sizeof ("xts-") - 1;
++      secondary_cipher = grub_crypto_cipher_open (ciph);
++      if (!secondary_cipher)
++	{
++	  grub_crypto_cipher_close (cipher);
++	  return NULL;
++	}
++      if (cipher->cipher->blocksize != GRUB_CRYPTODISK_GF_BYTES)
++	{
++	  grub_error (GRUB_ERR_BAD_ARGUMENT, "Unsupported XTS block size: %d",
++		      cipher->cipher->blocksize);
++	  grub_crypto_cipher_close (cipher);
++	  grub_crypto_cipher_close (secondary_cipher);
++	  return NULL;
++	}
++      if (secondary_cipher->cipher->blocksize != GRUB_CRYPTODISK_GF_BYTES)
++	{
++	  grub_crypto_cipher_close (cipher);
++	  grub_error (GRUB_ERR_BAD_ARGUMENT, "Unsupported XTS block size: %d",
++		      secondary_cipher->cipher->blocksize);
++	  grub_crypto_cipher_close (secondary_cipher);
++	  return NULL;
++	}
++    }
++  else if (grub_memcmp (ciphermode, "lrw-", sizeof ("lrw-") - 1) == 0)
++    {
++      mode = GRUB_CRYPTODISK_MODE_LRW;
++      cipheriv = ciphermode + sizeof ("lrw-") - 1;
++      if (cipher->cipher->blocksize != GRUB_CRYPTODISK_GF_BYTES)
++	{
++	  grub_error (GRUB_ERR_BAD_ARGUMENT, "Unsupported LRW block size: %d",
++		      cipher->cipher->blocksize);
++	  grub_crypto_cipher_close (cipher);
++	  return NULL;
++	}
++    }
++  else
++    {
++      grub_crypto_cipher_close (cipher);
++      grub_error (GRUB_ERR_BAD_ARGUMENT, "Unknown cipher mode: %s",
++		  ciphermode);
++      return NULL;
++    }
++
++  if (cipheriv == NULL);
++  else if (grub_memcmp (cipheriv, "plain", sizeof ("plain") - 1) == 0)
++      mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN;
++  else if (grub_memcmp (cipheriv, "plain64", sizeof ("plain64") - 1) == 0)
++      mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN64;
++  else if (grub_memcmp (cipheriv, "benbi", sizeof ("benbi") - 1) == 0)
++    {
++      if (cipher->cipher->blocksize & (cipher->cipher->blocksize - 1)
++	  || cipher->cipher->blocksize == 0)
++	grub_error (GRUB_ERR_BAD_ARGUMENT, "Unsupported benbi blocksize: %d",
++		    cipher->cipher->blocksize);
++	/* FIXME should we return an error here? */
++      for (benbi_log = 0;
++	   (cipher->cipher->blocksize << benbi_log) < GRUB_DISK_SECTOR_SIZE;
++	   benbi_log++);
++      mode_iv = GRUB_CRYPTODISK_MODE_IV_BENBI;
++    }
++  else if (grub_memcmp (cipheriv, "null", sizeof ("null") - 1) == 0)
++      mode_iv = GRUB_CRYPTODISK_MODE_IV_NULL;
++  else if (grub_memcmp (cipheriv, "essiv:", sizeof ("essiv:") - 1) == 0)
++    {
++      char *hash_str = cipheriv + 6;
++
++      mode_iv = GRUB_CRYPTODISK_MODE_IV_ESSIV;
++
++      /* Configure the hash and cipher used for ESSIV.  */
++      essiv_hash = grub_crypto_lookup_md_by_name (hash_str);
++      if (!essiv_hash)
++	{
++	  grub_crypto_cipher_close (cipher);
++	  grub_crypto_cipher_close (secondary_cipher);
++	  grub_error (GRUB_ERR_FILE_NOT_FOUND,
++		      "Couldn't load %s hash", hash_str);
++	  return NULL;
++	}
++      essiv_cipher = grub_crypto_cipher_open (ciph);
++      if (!essiv_cipher)
++	{
++	  grub_crypto_cipher_close (cipher);
++	  grub_crypto_cipher_close (secondary_cipher);
++	  return NULL;
++	}
++    }
++  else
++    {
++      grub_crypto_cipher_close (cipher);
++      grub_crypto_cipher_close (secondary_cipher);
++      grub_error (GRUB_ERR_BAD_ARGUMENT, "Unknown IV mode: %s",
++		  cipheriv);
++      return NULL;
++    }
++
++  /* Configure the passphrase hash (LUKS also uses AF splitter and HMAC).  */
++  hash = grub_crypto_lookup_md_by_name (hashspec);
++  if (!hash)
++    {
++      grub_crypto_cipher_close (cipher);
++      grub_crypto_cipher_close (essiv_cipher);
++      grub_crypto_cipher_close (secondary_cipher);
++      grub_error (GRUB_ERR_FILE_NOT_FOUND, "Couldn't load %s hash",
++		  hashspec);
++      return NULL;
++    }
++
++  newdev = grub_zalloc (sizeof (struct grub_cryptodisk));
++  if (!newdev)
++    {
++      grub_crypto_cipher_close (cipher);
++      grub_crypto_cipher_close (essiv_cipher);
++      grub_crypto_cipher_close (secondary_cipher);
++      return NULL;
++    }
++  newdev->cipher = cipher;
++  newdev->offset = 0;
++  newdev->source_disk = NULL;
++  newdev->benbi_log = benbi_log;
++  newdev->mode = mode;
++  newdev->mode_iv = mode_iv;
++  newdev->secondary_cipher = secondary_cipher;
++  newdev->essiv_cipher = essiv_cipher;
++  newdev->essiv_hash = essiv_hash;
++  newdev->hash = hash;
++  newdev->log_sector_size = 9;
++  newdev->total_length = grub_disk_get_size (disk) - newdev->offset;
++  grub_memcpy (newdev->uuid, uuid, sizeof (newdev->uuid));
++  COMPILE_TIME_ASSERT (sizeof (newdev->uuid) >= sizeof (uuid));
++
++  return newdev;
++}
++
+ static grub_extcmd_t cmd;
+ 
+ GRUB_MOD_INIT (cryptodisk)
+ {
+   grub_disk_dev_register (&grub_cryptodisk_dev);
+   cmd = grub_register_extcmd ("cryptomount", grub_cmd_cryptomount, 0,
+-			      N_("SOURCE|-u UUID|-a|-b|-H file"),
++			      N_("SOURCE|-u UUID|-a|-b|-H file|-p -c cipher -d digest"),
+ 			      N_("Mount a crypto device."), options);
+   grub_procfs_register ("luks_script", &luks_script);
+ }
+diff --git a/grub-core/disk/luks.c b/grub-core/disk/luks.c
+index 11e437e..4ebe21b 100644
+--- a/grub-core/disk/luks.c
++++ b/grub-core/disk/luks.c
+@@ -30,8 +30,6 @@
+ 
+ GRUB_MOD_LICENSE ("GPLv3+");
+ 
+-#define MAX_PASSPHRASE 256
+-
+ #define LUKS_KEY_ENABLED  0x00AC71F3
+ 
+ /* On disk LUKS header */
+@@ -76,15 +74,7 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+   char uuid[sizeof (header.uuid) + 1];
+   char ciphername[sizeof (header.cipherName) + 1];
+   char ciphermode[sizeof (header.cipherMode) + 1];
+-  char *cipheriv = NULL;
+   char hashspec[sizeof (header.hashSpec) + 1];
+-  grub_crypto_cipher_handle_t cipher = NULL, secondary_cipher = NULL;
+-  grub_crypto_cipher_handle_t essiv_cipher = NULL;
+-  const gcry_md_spec_t *hash = NULL, *essiv_hash = NULL;
+-  const struct gcry_cipher_spec *ciph;
+-  grub_cryptodisk_mode_t mode;
+-  grub_cryptodisk_mode_iv_t mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN64;
+-  int benbi_log = 0;
+   grub_err_t err;
+ 
+   err = GRUB_ERR_NONE;
+@@ -119,7 +109,7 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+        iptr++)
+     {
+       if (*iptr != '-')
+-	*optr++ = *iptr;
++        *optr++ = *iptr;
+     }
+   *optr = 0;
+ 
+@@ -129,6 +119,7 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+       return NULL;
+     }
+ 
++
+   /* Make sure that strings are null terminated.  */
+   grub_memcpy (ciphername, header.cipherName, sizeof (header.cipherName));
+   ciphername[sizeof (header.cipherName)] = 0;
+@@ -137,184 +128,10 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+   grub_memcpy (hashspec, header.hashSpec, sizeof (header.hashSpec));
+   hashspec[sizeof (header.hashSpec)] = 0;
+ 
+-  ciph = grub_crypto_lookup_cipher_by_name (ciphername);
+-  if (!ciph)
+-    {
+-      grub_error (GRUB_ERR_FILE_NOT_FOUND, "Cipher %s isn't available",
+-		  ciphername);
+-      return NULL;
+-    }
+-
+-  /* Configure the cipher used for the bulk data.  */
+-  cipher = grub_crypto_cipher_open (ciph);
+-  if (!cipher)
+-    return NULL;
+-
+-  if (grub_be_to_cpu32 (header.keyBytes) > 1024)
+-    {
+-      grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid keysize %d",
+-		  grub_be_to_cpu32 (header.keyBytes));
+-      grub_crypto_cipher_close (cipher);
+-      return NULL;
+-    }
+-
+-  /* Configure the cipher mode.  */
+-  if (grub_strcmp (ciphermode, "ecb") == 0)
+-    {
+-      mode = GRUB_CRYPTODISK_MODE_ECB;
+-      mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN;
+-      cipheriv = NULL;
+-    }
+-  else if (grub_strcmp (ciphermode, "plain") == 0)
+-    {
+-      mode = GRUB_CRYPTODISK_MODE_CBC;
+-      mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN;
+-      cipheriv = NULL;
+-    }
+-  else if (grub_memcmp (ciphermode, "cbc-", sizeof ("cbc-") - 1) == 0)
+-    {
+-      mode = GRUB_CRYPTODISK_MODE_CBC;
+-      cipheriv = ciphermode + sizeof ("cbc-") - 1;
+-    }
+-  else if (grub_memcmp (ciphermode, "pcbc-", sizeof ("pcbc-") - 1) == 0)
+-    {
+-      mode = GRUB_CRYPTODISK_MODE_PCBC;
+-      cipheriv = ciphermode + sizeof ("pcbc-") - 1;
+-    }
+-  else if (grub_memcmp (ciphermode, "xts-", sizeof ("xts-") - 1) == 0)
+-    {
+-      mode = GRUB_CRYPTODISK_MODE_XTS;
+-      cipheriv = ciphermode + sizeof ("xts-") - 1;
+-      secondary_cipher = grub_crypto_cipher_open (ciph);
+-      if (!secondary_cipher)
+-	{
+-	  grub_crypto_cipher_close (cipher);
+-	  return NULL;
+-	}
+-      if (cipher->cipher->blocksize != GRUB_CRYPTODISK_GF_BYTES)
+-	{
+-	  grub_error (GRUB_ERR_BAD_ARGUMENT, "Unsupported XTS block size: %d",
+-		      cipher->cipher->blocksize);
+-	  grub_crypto_cipher_close (cipher);
+-	  grub_crypto_cipher_close (secondary_cipher);
+-	  return NULL;
+-	}
+-      if (secondary_cipher->cipher->blocksize != GRUB_CRYPTODISK_GF_BYTES)
+-	{
+-	  grub_crypto_cipher_close (cipher);
+-	  grub_error (GRUB_ERR_BAD_ARGUMENT, "Unsupported XTS block size: %d",
+-		      secondary_cipher->cipher->blocksize);
+-	  grub_crypto_cipher_close (secondary_cipher);
+-	  return NULL;
+-	}
+-    }
+-  else if (grub_memcmp (ciphermode, "lrw-", sizeof ("lrw-") - 1) == 0)
+-    {
+-      mode = GRUB_CRYPTODISK_MODE_LRW;
+-      cipheriv = ciphermode + sizeof ("lrw-") - 1;
+-      if (cipher->cipher->blocksize != GRUB_CRYPTODISK_GF_BYTES)
+-	{
+-	  grub_error (GRUB_ERR_BAD_ARGUMENT, "Unsupported LRW block size: %d",
+-		      cipher->cipher->blocksize);
+-	  grub_crypto_cipher_close (cipher);
+-	  return NULL;
+-	}
+-    }
+-  else
+-    {
+-      grub_crypto_cipher_close (cipher);
+-      grub_error (GRUB_ERR_BAD_ARGUMENT, "Unknown cipher mode: %s",
+-		  ciphermode);
+-      return NULL;
+-    }
+-
+-  if (cipheriv == NULL);
+-  else if (grub_memcmp (cipheriv, "plain", sizeof ("plain") - 1) == 0)
+-      mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN;
+-  else if (grub_memcmp (cipheriv, "plain64", sizeof ("plain64") - 1) == 0)
+-      mode_iv = GRUB_CRYPTODISK_MODE_IV_PLAIN64;
+-  else if (grub_memcmp (cipheriv, "benbi", sizeof ("benbi") - 1) == 0)
+-    {
+-      if (cipher->cipher->blocksize & (cipher->cipher->blocksize - 1)
+-	  || cipher->cipher->blocksize == 0)
+-	grub_error (GRUB_ERR_BAD_ARGUMENT, "Unsupported benbi blocksize: %d",
+-		    cipher->cipher->blocksize);
+-	/* FIXME should we return an error here? */
+-      for (benbi_log = 0; 
+-	   (cipher->cipher->blocksize << benbi_log) < GRUB_DISK_SECTOR_SIZE;
+-	   benbi_log++);
+-      mode_iv = GRUB_CRYPTODISK_MODE_IV_BENBI;
+-    }
+-  else if (grub_memcmp (cipheriv, "null", sizeof ("null") - 1) == 0)
+-      mode_iv = GRUB_CRYPTODISK_MODE_IV_NULL;
+-  else if (grub_memcmp (cipheriv, "essiv:", sizeof ("essiv:") - 1) == 0)
+-    {
+-      char *hash_str = cipheriv + 6;
+-
+-      mode_iv = GRUB_CRYPTODISK_MODE_IV_ESSIV;
+-
+-      /* Configure the hash and cipher used for ESSIV.  */
+-      essiv_hash = grub_crypto_lookup_md_by_name (hash_str);
+-      if (!essiv_hash)
+-	{
+-	  grub_crypto_cipher_close (cipher);
+-	  grub_crypto_cipher_close (secondary_cipher);
+-	  grub_error (GRUB_ERR_FILE_NOT_FOUND,
+-		      "Couldn't load %s hash", hash_str);
+-	  return NULL;
+-	}
+-      essiv_cipher = grub_crypto_cipher_open (ciph);
+-      if (!essiv_cipher)
+-	{
+-	  grub_crypto_cipher_close (cipher);
+-	  grub_crypto_cipher_close (secondary_cipher);
+-	  return NULL;
+-	}
+-    }
+-  else
+-    {
+-      grub_crypto_cipher_close (cipher);
+-      grub_crypto_cipher_close (secondary_cipher);
+-      grub_error (GRUB_ERR_BAD_ARGUMENT, "Unknown IV mode: %s",
+-		  cipheriv);
+-      return NULL;
+-    }
+-
+-  /* Configure the hash used for the AF splitter and HMAC.  */
+-  hash = grub_crypto_lookup_md_by_name (hashspec);
+-  if (!hash)
+-    {
+-      grub_crypto_cipher_close (cipher);
+-      grub_crypto_cipher_close (essiv_cipher);
+-      grub_crypto_cipher_close (secondary_cipher);
+-      grub_error (GRUB_ERR_FILE_NOT_FOUND, "Couldn't load %s hash",
+-		  hashspec);
+-      return NULL;
+-    }
++  newdev = grub_cryptodisk_create (disk, uuid, ciphername, ciphermode, hashspec);
+ 
+-  newdev = grub_zalloc (sizeof (struct grub_cryptodisk));
+-  if (!newdev)
+-    {
+-      grub_crypto_cipher_close (cipher);
+-      grub_crypto_cipher_close (essiv_cipher);
+-      grub_crypto_cipher_close (secondary_cipher);
+-      return NULL;
+-    }
+-  newdev->cipher = cipher;
+   newdev->offset = grub_be_to_cpu32 (header.payloadOffset);
+-  newdev->source_disk = NULL;
+-  newdev->benbi_log = benbi_log;
+-  newdev->mode = mode;
+-  newdev->mode_iv = mode_iv;
+-  newdev->secondary_cipher = secondary_cipher;
+-  newdev->essiv_cipher = essiv_cipher;
+-  newdev->essiv_hash = essiv_hash;
+-  newdev->hash = hash;
+-  newdev->log_sector_size = 9;
+-  newdev->total_length = grub_disk_get_size (disk) - newdev->offset;
+-  grub_memcpy (newdev->uuid, uuid, sizeof (newdev->uuid));
+   newdev->modname = "luks";
+-  COMPILE_TIME_ASSERT (sizeof (newdev->uuid) >= sizeof (uuid));
+ 
+   return newdev;
+ }
+@@ -329,7 +146,7 @@ luks_recover_key (grub_disk_t source,
+   struct grub_luks_phdr header;
+   grub_size_t keysize;
+   grub_uint8_t *split_key = NULL;
+-  char interactive_passphrase[MAX_PASSPHRASE] = "";
++  char interactive_passphrase[GRUB_CRYPTODISK_MAX_PASSPHRASE] = "";
+   grub_uint8_t *passphrase;
+   grub_size_t passphrase_length;
+   grub_uint8_t candidate_digest[sizeof (header.mkDigest)];
+@@ -376,7 +193,7 @@ luks_recover_key (grub_disk_t source,
+           /* Use bytestring from key file as passphrase */
+           passphrase = keyfile_bytes;
+           passphrase_length = keyfile_bytes_size;
+-	  keyfile_bytes = NULL; /* use it only once */
++          keyfile_bytes = NULL; /* use it only once */
+         }
+       else
+         {
+@@ -387,7 +204,7 @@ luks_recover_key (grub_disk_t source,
+           grub_printf_ (N_("Enter passphrase for %s%s%s (%s): "), source->name,
+                               source->partition ? "," : "", tmp ? : "", dev->uuid);
+           grub_free (tmp);
+-          if (!grub_password_get (interactive_passphrase, MAX_PASSPHRASE))
++          if (!grub_password_get (interactive_passphrase, GRUB_CRYPTODISK_MAX_PASSPHRASE))
+             {
+               grub_free (split_key);
+               return grub_error (GRUB_ERR_BAD_ARGUMENT, "Passphrase not supplied");
+diff --git a/include/grub/cryptodisk.h b/include/grub/cryptodisk.h
+index 0299625..4076412 100644
+--- a/include/grub/cryptodisk.h
++++ b/include/grub/cryptodisk.h
+@@ -54,9 +54,14 @@ typedef enum
+ #define GRUB_CRYPTODISK_GF_LOG_BYTES (GRUB_CRYPTODISK_GF_LOG_SIZE - 3)
+ #define GRUB_CRYPTODISK_GF_BYTES (1U << GRUB_CRYPTODISK_GF_LOG_BYTES)
+ #define GRUB_CRYPTODISK_MAX_KEYLEN 128
++#define GRUB_CRYPTODISK_MAX_PASSPHRASE 256
+ 
+ #define GRUB_CRYPTODISK_MAX_KEYFILE_SIZE 8192
+ 
++#define GRUB_CRYPTODISK_PLAIN_CIPHER  "aes-cbc-essiv:sha256"
++#define GRUB_CRYPTODISK_PLAIN_DIGEST  "ripemd160"
++#define GRUB_CRYPTODISK_PLAIN_KEYSIZE 256
++
+ struct grub_cryptodisk;
+ 
+ typedef gcry_err_code_t
+@@ -159,4 +164,7 @@ grub_util_get_geli_uuid (const char *dev);
+ grub_cryptodisk_t grub_cryptodisk_get_by_uuid (const char *uuid);
+ grub_cryptodisk_t grub_cryptodisk_get_by_source_disk (grub_disk_t disk);
+ 
++grub_cryptodisk_t grub_cryptodisk_create (grub_disk_t disk, char *uuid,
++				   char *ciphername, char *ciphermode, char *digest);
++
+ #endif
+-- 
+2.1.2
+
diff --git a/resources/grub/patch/grub.johnlane.ie/0005-Cryptomount-support-for-hyphens-in-UUID.patch b/resources/grub/patch/grub.johnlane.ie/0005-Cryptomount-support-for-hyphens-in-UUID.patch
new file mode 100644
index 0000000..2707ceb
--- /dev/null
+++ b/resources/grub/patch/grub.johnlane.ie/0005-Cryptomount-support-for-hyphens-in-UUID.patch
@@ -0,0 +1,122 @@
+From f723c22cb7d8a5a6633eaa0682e024e667fb581a Mon Sep 17 00:00:00 2001
+From: John Lane <john@lane.uk.net>
+Date: Fri, 26 Jun 2015 22:48:03 +0100
+Subject: [PATCH 5/5] Cryptomount support for hyphens in UUID
+
+---
+ grub-core/disk/cryptodisk.c | 20 +++++++++++++++++---
+ grub-core/disk/luks.c       | 26 ++++++++------------------
+ include/grub/cryptodisk.h   |  2 ++
+ 3 files changed, 27 insertions(+), 21 deletions(-)
+
+diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c
+index cd5cfc9..d36d16b 100644
+--- a/grub-core/disk/cryptodisk.c
++++ b/grub-core/disk/cryptodisk.c
+@@ -113,6 +113,20 @@ gf_mul_be (grub_uint8_t *o, const grub_uint8_t *a, const grub_uint8_t *b)
+     }
+ }
+ 
++int
++grub_cryptodisk_uuidcmp(char *uuid_a, char *uuid_b)
++{
++  while ((*uuid_a != '\0') && (*uuid_b != '\0'))
++    {
++      while (*uuid_a == '-') uuid_a++;
++      while (*uuid_b == '-') uuid_b++;
++      if (grub_toupper(*uuid_a) != grub_toupper(*uuid_b)) break;
++      uuid_a++;
++      uuid_b++;
++    }
++  return (*uuid_a == '\0') && (*uuid_b == '\0');
++}
++
+ static gcry_err_code_t
+ grub_crypto_pcbc_decrypt (grub_crypto_cipher_handle_t cipher,
+ 			 void *out, void *in, grub_size_t size,
+@@ -507,8 +521,8 @@ grub_cryptodisk_open (const char *name, grub_disk_t disk)
+   if (grub_memcmp (name, "cryptouuid/", sizeof ("cryptouuid/") - 1) == 0)
+     {
+       for (dev = cryptodisk_list; dev != NULL; dev = dev->next)
+-	if (grub_strcasecmp (name + sizeof ("cryptouuid/") - 1, dev->uuid) == 0)
+-	  break;
++        if (grub_cryptodisk_uuidcmp(name + sizeof ("cryptouuid/") - 1, dev->uuid))
++          break;
+     }
+   else
+     {
+@@ -739,7 +753,7 @@ grub_cryptodisk_get_by_uuid (const char *uuid)
+ {
+   grub_cryptodisk_t dev;
+   for (dev = cryptodisk_list; dev != NULL; dev = dev->next)
+-    if (grub_strcasecmp (dev->uuid, uuid) == 0)
++    if (grub_cryptodisk_uuidcmp(dev->uuid, uuid))
+       return dev;
+   return NULL;
+ }
+diff --git a/grub-core/disk/luks.c b/grub-core/disk/luks.c
+index 4ebe21b..80a7606 100644
+--- a/grub-core/disk/luks.c
++++ b/grub-core/disk/luks.c
+@@ -68,9 +68,7 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+ 		   int check_boot, grub_file_t hdr)
+ {
+   grub_cryptodisk_t newdev;
+-  const char *iptr;
+   struct grub_luks_phdr header;
+-  char *optr;
+   char uuid[sizeof (header.uuid) + 1];
+   char ciphername[sizeof (header.cipherName) + 1];
+   char ciphermode[sizeof (header.cipherMode) + 1];
+@@ -104,22 +102,6 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+       || grub_be_to_cpu16 (header.version) != 1)
+     return NULL;
+ 
+-  optr = uuid;
+-  for (iptr = header.uuid; iptr < &header.uuid[ARRAY_SIZE (header.uuid)];
+-       iptr++)
+-    {
+-      if (*iptr != '-')
+-        *optr++ = *iptr;
+-    }
+-  *optr = 0;
+-
+-  if (check_uuid && grub_strcasecmp (check_uuid, uuid) != 0)
+-    {
+-      grub_dprintf ("luks", "%s != %s\n", uuid, check_uuid);
+-      return NULL;
+-    }
+-
+-
+   /* Make sure that strings are null terminated.  */
+   grub_memcpy (ciphername, header.cipherName, sizeof (header.cipherName));
+   ciphername[sizeof (header.cipherName)] = 0;
+@@ -127,6 +109,14 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
+   ciphermode[sizeof (header.cipherMode)] = 0;
+   grub_memcpy (hashspec, header.hashSpec, sizeof (header.hashSpec));
+   hashspec[sizeof (header.hashSpec)] = 0;
++  grub_memcpy (uuid, header.uuid, sizeof (header.uuid));
++  uuid[sizeof (header.uuid)] = 0;
++
++  if ( check_uuid && ! grub_cryptodisk_uuidcmp(check_uuid, uuid))
++    {
++      grub_dprintf ("luks", "%s != %s\n", uuid, check_uuid);
++      return NULL;
++    }
+ 
+   newdev = grub_cryptodisk_create (disk, uuid, ciphername, ciphermode, hashspec);
+ 
+diff --git a/include/grub/cryptodisk.h b/include/grub/cryptodisk.h
+index 4076412..a564f2c 100644
+--- a/include/grub/cryptodisk.h
++++ b/include/grub/cryptodisk.h
+@@ -167,4 +167,6 @@ grub_cryptodisk_t grub_cryptodisk_get_by_source_disk (grub_disk_t disk);
+ grub_cryptodisk_t grub_cryptodisk_create (grub_disk_t disk, char *uuid,
+ 				   char *ciphername, char *ciphermode, char *digest);
+ 
++int
++grub_cryptodisk_uuidcmp(char *uuid_a, char *uuid_b);
+ #endif
+-- 
+2.1.2
+
diff --git a/resources/scripts/helpers/download/grub b/resources/scripts/helpers/download/grub
index 5138f76..7a7b172 100755
--- a/resources/scripts/helpers/download/grub
+++ b/resources/scripts/helpers/download/grub
@@ -49,5 +49,12 @@ git reset --hard 7a210304ebfd6d704b4fc08fe496a0c417441879
 # Replace "GNU GRUB version" in GRUB screen with "FREE AS IN FREEDOM"
 git am "../resources/grub/patch/0001-grub-core-normal-main.c-Display-FREE-AS-IN-FREEDOM-n.patch"
 
+# GRUB enhancement patches from grub.johnlane.ie
+git am "../resources/grub/patch/grub.johnlane.ie/0001-Cryptomount-support-LUKS-detached-header.patch"
+git am "../resources/grub/patch/grub.johnlane.ie/0002-Cryptomount-support-key-files.patch"
+git am "../resources/grub/patch/grub.johnlane.ie/0003-Cryptomount-luks-allow-multiple-passphrase-attempts.patch"
+git am "../resources/grub/patch/grub.johnlane.ie/0004-Cryptomount-support-plain-dm-crypt.patch"
+git am "../resources/grub/patch/grub.johnlane.ie/0005-Cryptomount-support-for-hyphens-in-UUID.patch"
+
 cd "../"
 printf "\n\n"