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package-helpers-cmxsl/helpers/DATA/grub2-unsigned/0004-Cryptomount-support-plain-dm-crypt.patch
Luis Guzmán 62c481c64a Grub2 unsigned 10.0
2021-12-11 05:23:03 +00:00

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diff --git a/0004-Cryptomount-support-plain-dm-crypt.patch b/0004-Cryptomount-support-plain-dm-crypt.patch
new file mode 100644
index 00000000000..34c10d7216b
--- /dev/null
+++ b/0004-Cryptomount-support-plain-dm-crypt.patch
@@ -0,0 +1,644 @@
+From a8f9e3dcece89c179e89414abe89985c7ab1e03f 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 4/7] Cryptomount support plain dm-crypt
+
+Patch modified to take into account a change to context
+brought about by c93d3e694713b8230fa2cf88414fabe005b56782
+
+grub-core/disk/cryptodisk.c
+142c142
+< if (disklast)
+---
+>
+---
+ 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 5261af547..7f656f75c 100644
+--- a/grub-core/disk/cryptodisk.c
++++ b/grub-core/disk/cryptodisk.c
+@@ -45,6 +45,12 @@ 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}
+ };
+
+@@ -933,6 +939,48 @@ 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)
+ {
+@@ -1060,7 +1108,63 @@ grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int argc, char **args)
+ return GRUB_ERR_NONE;
+ }
+
+- err = grub_cryptodisk_scan_device_real (diskname, 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 (diskname, disk);
+
+ grub_disk_close (disk);
+ if (disklast)
+@@ -1193,13 +1297,203 @@ 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 11e437edb..4ebe21b4e 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 67f6b0b59..bb25ab730 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
+@@ -160,4 +165,7 @@ 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
+--
+2.16.2
+
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