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-rw-r--r--crypto/cryptfs/Android.mk53
-rw-r--r--crypto/cryptfs/cryptfs.c74
-rw-r--r--crypto/ics/cryptfs.c809
-rw-r--r--crypto/ics/cryptfs.h44
-rw-r--r--crypto/libcrypt_samsung/Android.mk11
-rw-r--r--crypto/libcrypt_samsung/include/libcrypt_samsung.h141
-rw-r--r--crypto/libcrypt_samsung/libcrypt_samsung.c68
7 files changed, 542 insertions, 658 deletions
diff --git a/crypto/cryptfs/Android.mk b/crypto/cryptfs/Android.mk
new file mode 100644
index 000000000..3267c931d
--- /dev/null
+++ b/crypto/cryptfs/Android.mk
@@ -0,0 +1,53 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= \
+ cryptfs.c
+
+LOCAL_CFLAGS:= -g -c -W -I../fs_mgr/include
+LOCAL_CFLAGS += -DTW_INCLUDE_CRYPTO
+LOCAL_CFLAGS += -DCRYPTO_FS_TYPE=\"$(TW_CRYPTO_FS_TYPE)\"
+LOCAL_CFLAGS += -DCRYPTO_REAL_BLKDEV=\"$(TW_CRYPTO_REAL_BLKDEV)\"
+LOCAL_CFLAGS += -DCRYPTO_MNT_POINT=\"$(TW_CRYPTO_MNT_POINT)\"
+LOCAL_CFLAGS += -DCRYPTO_FS_OPTIONS=\"$(TW_CRYPTO_FS_OPTIONS)\"
+LOCAL_CFLAGS += -DCRYPTO_FS_FLAGS=\"$(TW_CRYPTO_FS_FLAGS)\"
+LOCAL_CFLAGS += -DCRYPTO_KEY_LOC=\"$(TW_CRYPTO_KEY_LOC)\"
+ifdef TW_CRYPTO_SD_REAL_BLKDEV
+ LOCAL_CFLAGS += -DCRYPTO_SD_REAL_BLKDEV=\"$(TW_CRYPTO_SD_REAL_BLKDEV)\"
+ LOCAL_CFLAGS += -DCRYPTO_SD_FS_TYPE=\"$(TW_CRYPTO_SD_FS_TYPE)\"
+endif
+ifneq ($(TW_INTERNAL_STORAGE_PATH),)
+ LOCAL_CFLAGS += -DTW_INTERNAL_STORAGE_PATH=$(TW_INTERNAL_STORAGE_PATH)
+endif
+ifneq ($(TW_INTERNAL_STORAGE_MOUNT_POINT),)
+ LOCAL_CFLAGS += -DTW_INTERNAL_STORAGE_MOUNT_POINT=$(TW_INTERNAL_STORAGE_MOUNT_POINT)
+endif
+ifneq ($(TW_EXTERNAL_STORAGE_PATH),)
+ LOCAL_CFLAGS += -DTW_EXTERNAL_STORAGE_PATH=$(TW_EXTERNAL_STORAGE_PATH)
+endif
+ifneq ($(TW_EXTERNAL_STORAGE_MOUNT_POINT),)
+ LOCAL_CFLAGS += -DTW_EXTERNAL_STORAGE_MOUNT_POINT=$(TW_EXTERNAL_STORAGE_MOUNT_POINT)
+endif
+
+LOCAL_C_INCLUDES += system/extras/ext4_utils external/openssl/include
+LOCAL_MODULE:=cryptfs
+LOCAL_MODULE_TAGS:= eng
+LOCAL_SHARED_LIBRARIES += libc libcutils
+LOCAL_SHARED_LIBRARIES += libcrypto
+
+
+#LOCAL_LDFLAGS += -L$(TARGET_OUT_SHARED_LIBRARIES) -lsec_km -lsec_ecryptfs -ldl
+LOCAL_LDFLAGS += -ldl
+
+LOCAL_STATIC_LIBRARIES += libmtdutils
+LOCAL_STATIC_LIBRARIES += libminadbd libminzip libunz
+LOCAL_STATIC_LIBRARIES += libminuitwrp libpixelflinger_static libpng libjpegtwrp libgui
+LOCAL_SHARED_LIBRARIES += libz libc libstlport libcutils libstdc++ libmincrypt libext4_utils
+LOCAL_STATIC_LIBRARIES += libcrypt_samsung
+
+
+LOCAL_STATIC_LIBRARIES += $(TARGET_RECOVERY_UI_LIB)
+#LOCAL_STATIC_LIBRARIES += libfs_mgrtwrp
+LOCAL_MODULE_CLASS := UTILITY_EXECUTABLES
+LOCAL_MODULE_PATH := $(PRODUCT_OUT)/utilities
+include $(BUILD_EXECUTABLE)
diff --git a/crypto/cryptfs/cryptfs.c b/crypto/cryptfs/cryptfs.c
new file mode 100644
index 000000000..59e7added
--- /dev/null
+++ b/crypto/cryptfs/cryptfs.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2013 a3955269 all rights reversed, no rights reserved.
+ */
+
+#define TW_INCLUDE_CRYPTO_SAMSUNG
+#include "../ics/cryptfs.c"
+
+int dm_remove_device(const char *name)
+{
+ int r;
+ r = delete_crypto_blk_dev(name);
+ if(!r)
+ printf("crypto block device '%s' deleted.\n", name);
+ else
+ printf("deleting crypto block device '%s' failed. [%d - %s]\n", name, r, strerror(errno));
+ return r;
+}
+
+int ecryptfs_test(const char *pw)
+{
+ char pwbuf[256];
+ int r;
+
+ strcpy(pwbuf, pw);
+ // 0: building options without file encryption filtering.
+ // 1: building options with media files filtering.
+ // 2: building options with all new files filtering.
+ r = mount_ecryptfs_drive(pwbuf, "/emmc", "/emmc", 0);
+ printf("mount_ecryptfs_drive: %d\n", r);
+ r = mount("/dev/block/mmcblk1", "/emmc", "vfat", MS_RDONLY, "");
+ printf("mount: %d\n", r);
+
+ r = umount("/emmc");///dev/block/mmcblk1");
+ printf("umount: %d\n", r);
+
+ //r = unmount_ecryptfs_drive("/emmc");
+ //printf("unmount_ecryptfs_drive: %d\n", r);
+
+ return r;
+}
+
+int main(int argc, char* argv[])
+{
+ if(argc < 2)
+ {
+ printf("no args!\n");
+ return 1;
+ }
+
+ property_set("ro.crypto.state", "encrypted");
+
+ property_set("ro.crypto.fs_type", CRYPTO_FS_TYPE);
+ property_set("ro.crypto.fs_real_blkdev", CRYPTO_REAL_BLKDEV);
+ property_set("ro.crypto.fs_mnt_point", CRYPTO_MNT_POINT);
+ property_set("ro.crypto.fs_options", CRYPTO_FS_OPTIONS);
+ property_set("ro.crypto.fs_flags", CRYPTO_FS_FLAGS);
+ property_set("ro.crypto.keyfile.userdata", CRYPTO_KEY_LOC);
+
+#ifdef CRYPTO_SD_FS_TYPE
+ property_set("ro.crypto.sd_fs_type", CRYPTO_SD_FS_TYPE);
+ property_set("ro.crypto.sd_fs_real_blkdev", CRYPTO_SD_REAL_BLKDEV);
+ property_set("ro.crypto.sd_fs_mnt_point", EXPAND(TW_INTERNAL_STORAGE_PATH));
+#endif
+
+ property_set("rw.km_fips_status", "ready");
+
+ delete_crypto_blk_dev("userdata");
+ delete_crypto_blk_dev("sdcard");
+ delete_crypto_blk_dev("emmc");
+
+ cryptfs_check_passwd(argv[1]);
+
+ return 0;
+};
diff --git a/crypto/ics/cryptfs.c b/crypto/ics/cryptfs.c
index 5751cf74d..8a6c581fe 100644
--- a/crypto/ics/cryptfs.c
+++ b/crypto/ics/cryptfs.c
@@ -49,6 +49,9 @@
#define DATA_MNT_POINT "/data"
#define HASH_COUNT 2000
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+#define KEY_LEN_BYTES_SAMSUNG (sizeof(edk_t))
+#endif
#define KEY_LEN_BYTES 16
#define IV_LEN_BYTES 16
@@ -58,12 +61,26 @@
#define EXT4_FS 1
#define FAT_FS 2
+#ifndef EXPAND
+#define STRINGIFY(x) #x
+#define EXPAND(x) STRINGIFY(x)
+#endif
+
char *me = "cryptfs";
-static unsigned char saved_master_key[KEY_LEN_BYTES];
static char *saved_data_blkdev;
static char *saved_mount_point;
static int master_key_saved = 0;
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+static int using_samsung_encryption = 0;
+//static edk_t saved_master_key;
+static unsigned char saved_master_key[KEY_LEN_BYTES_SAMSUNG];
+#else
+static unsigned char saved_master_key[KEY_LEN_BYTES];
+#endif
+
+int cryptfs_setup_volume(const char *label, const char *real_blkdev, char *crypto_blkdev);
+
static void ioctl_init(struct dm_ioctl *io, size_t dataSize, const char *name, unsigned flags)
{
@@ -79,37 +96,6 @@ static void ioctl_init(struct dm_ioctl *io, size_t dataSize, const char *name, u
}
}
-static unsigned int get_fs_size(char *dev)
-{
- int fd, block_size;
- struct ext4_super_block sb;
- off64_t len;
-
- if ((fd = open(dev, O_RDONLY)) < 0) {
- SLOGE("Cannot open device to get filesystem size ");
- return 0;
- }
-
- if (lseek64(fd, 1024, SEEK_SET) < 0) {
- SLOGE("Cannot seek to superblock");
- return 0;
- }
-
- if (read(fd, &sb, sizeof(sb)) != sizeof(sb)) {
- SLOGE("Cannot read superblock");
- return 0;
- }
-
- close(fd);
-
- block_size = 1024 << sb.s_log_block_size;
- /* compute length in bytes */
- len = ( ((off64_t)sb.s_blocks_count_hi << 32) + sb.s_blocks_count_lo) * block_size;
-
- /* return length in sectors */
- return (unsigned int) (len / 512);
-}
-
static unsigned int get_blkdev_size(int fd)
{
unsigned int nr_sec;
@@ -127,100 +113,8 @@ static unsigned int get_blkdev_size(int fd)
static int put_crypt_ftr_and_key(char *real_blk_name, struct crypt_mnt_ftr *crypt_ftr,
unsigned char *key, unsigned char *salt)
{
- int fd;
- unsigned int nr_sec, cnt;
- off64_t off;
- int rc = -1;
- char *fname;
- char key_loc[PROPERTY_VALUE_MAX];
- struct stat statbuf;
-
- property_get(KEY_LOC_PROP, key_loc, KEY_IN_FOOTER);
-
- if (!strcmp(key_loc, KEY_IN_FOOTER)) {
- fname = real_blk_name;
- if ( (fd = open(fname, O_RDWR)) < 0) {
- SLOGE("Cannot open real block device %s\n", fname);
- return -1;
- }
-
- if ( (nr_sec = get_blkdev_size(fd)) == 0) {
- SLOGE("Cannot get size of block device %s\n", fname);
- goto errout;
- }
-
- /* If it's an encrypted Android partition, the last 16 Kbytes contain the
- * encryption info footer and key, and plenty of bytes to spare for future
- * growth.
- */
- off = ((off64_t)nr_sec * 512) - CRYPT_FOOTER_OFFSET;
-
- if (lseek64(fd, off, SEEK_SET) == -1) {
- SLOGE("Cannot seek to real block device footer\n");
- goto errout;
- }
- } else if (key_loc[0] == '/') {
- fname = key_loc;
- if ( (fd = open(fname, O_RDWR | O_CREAT, 0600)) < 0) {
- SLOGE("Cannot open footer file %s\n", fname);
- return -1;
- }
- } else {
- SLOGE("Unexpected value for" KEY_LOC_PROP "\n");
- return -1;;
- }
-
- if ((cnt = write(fd, crypt_ftr, sizeof(struct crypt_mnt_ftr))) != sizeof(struct crypt_mnt_ftr)) {
- SLOGE("Cannot write real block device footer\n");
- goto errout;
- }
-
- if (key) {
- if (crypt_ftr->keysize != KEY_LEN_BYTES) {
- SLOGE("Keysize of %d bits not supported for real block device %s\n",
- crypt_ftr->keysize*8, fname);
- goto errout;
- }
-
- if ( (cnt = write(fd, key, crypt_ftr->keysize)) != crypt_ftr->keysize) {
- SLOGE("Cannot write key for real block device %s\n", fname);
- goto errout;
- }
- }
-
- if (salt) {
- /* Compute the offset from the last write to the salt */
- off = KEY_TO_SALT_PADDING;
- if (! key)
- off += crypt_ftr->keysize;
-
- if (lseek64(fd, off, SEEK_CUR) == -1) {
- SLOGE("Cannot seek to real block device salt \n");
- goto errout;
- }
-
- if ( (cnt = write(fd, salt, SALT_LEN)) != SALT_LEN) {
- SLOGE("Cannot write salt for real block device %s\n", fname);
- goto errout;
- }
- }
-
- fstat(fd, &statbuf);
- /* If the keys are kept on a raw block device, do not try to truncate it. */
- if (S_ISREG(statbuf.st_mode) && (key_loc[0] == '/')) {
- if (ftruncate(fd, 0x4000)) {
- SLOGE("Cannot set footer file size\n", fname);
- goto errout;
- }
- }
-
- /* Success! */
- rc = 0;
-
-errout:
- close(fd);
- return rc;
-
+ // we don't need to update it...
+ return 0;
}
static int get_crypt_ftr_and_key(char *real_blk_name, struct crypt_mnt_ftr *crypt_ftr,
@@ -267,7 +161,11 @@ static int get_crypt_ftr_and_key(char *real_blk_name, struct crypt_mnt_ftr *cryp
/* Make sure it's 16 Kbytes in length */
fstat(fd, &statbuf);
- if (S_ISREG(statbuf.st_mode) && (statbuf.st_size != 0x4000)) {
+ if (S_ISREG(statbuf.st_mode) && (statbuf.st_size != 0x4000
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+ && statbuf.st_size != 0x8000
+#endif
+ )) {
printf("footer file %s is not the expected size!\n", fname);
goto errout;
}
@@ -282,8 +180,20 @@ static int get_crypt_ftr_and_key(char *real_blk_name, struct crypt_mnt_ftr *cryp
}
if (crypt_ftr->magic != CRYPT_MNT_MAGIC) {
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+ if (crypt_ftr->magic != CRYPT_MNT_MAGIC_SAMSUNG) {
+ printf("Bad magic for real block device %s\n", fname);
+ goto errout;
+ } else {
+ printf("Using Samsung encryption.\n");
+ using_samsung_encryption = 1;
+ memcpy(key, &crypt_ftr->edk_payload, sizeof(edk_payload_t));
+
+ }
+#else
printf("Bad magic for real block device %s\n", fname);
goto errout;
+#endif
}
if (crypt_ftr->major_version != 1) {
@@ -307,7 +217,7 @@ static int get_crypt_ftr_and_key(char *real_blk_name, struct crypt_mnt_ftr *cryp
}
}
- if (crypt_ftr->keysize != KEY_LEN_BYTES) {
+ if (crypt_ftr->keysize != sizeof(saved_master_key)) {
printf("Keysize of %d bits not supported for real block device %s\n",
crypt_ftr->keysize * 8, fname);
goto errout;
@@ -360,7 +270,7 @@ void convert_key_to_hex_ascii(unsigned char *master_key, unsigned int keysize,
}
static int create_crypto_blk_dev(struct crypt_mnt_ftr *crypt_ftr, unsigned char *master_key,
- char *real_blk_name, char *crypto_blk_name, const char *name)
+ const char *real_blk_name, char *crypto_blk_name, const char *name)
{
char buffer[DM_CRYPT_BUF_SIZE];
char master_key_ascii[129]; /* Large enough to hold 512 bit key and null */
@@ -407,6 +317,7 @@ static int create_crypto_blk_dev(struct crypt_mnt_ftr *crypt_ftr, unsigned char
convert_key_to_hex_ascii(master_key, crypt_ftr->keysize, master_key_ascii);
sprintf(crypt_params, "%s %s 0 %s 0", crypt_ftr->crypto_type_name,
master_key_ascii, real_blk_name);
+ //printf("cryptsetup params: '%s'\n", crypt_params);
crypt_params += strlen(crypt_params) + 1;
crypt_params = (char *) (((unsigned long)crypt_params + 7) & ~8); /* Align to an 8 byte boundary */
tgt->next = crypt_params - buffer;
@@ -433,7 +344,7 @@ errout:
return retval;
}
-static int delete_crypto_blk_dev(char *name)
+static int delete_crypto_blk_dev(const char *name)
{
int fd;
char buffer[DM_CRYPT_BUF_SIZE];
@@ -470,47 +381,17 @@ static void pbkdf2(char *passwd, unsigned char *salt, unsigned char *ikey)
HASH_COUNT, KEY_LEN_BYTES+IV_LEN_BYTES, ikey);
}
-static int encrypt_master_key(char *passwd, unsigned char *salt,
- unsigned char *decrypted_master_key,
- unsigned char *encrypted_master_key)
-{
- unsigned char ikey[32+32] = { 0 }; /* Big enough to hold a 256 bit key and 256 bit IV */
- EVP_CIPHER_CTX e_ctx;
- int encrypted_len, final_len;
-
- /* Turn the password into a key and IV that can decrypt the master key */
- pbkdf2(passwd, salt, ikey);
-
- /* Initialize the decryption engine */
- if (! EVP_EncryptInit(&e_ctx, EVP_aes_128_cbc(), ikey, ikey+KEY_LEN_BYTES)) {
- SLOGE("EVP_EncryptInit failed\n");
- return -1;
- }
- EVP_CIPHER_CTX_set_padding(&e_ctx, 0); /* Turn off padding as our data is block aligned */
-
- /* Encrypt the master key */
- if (! EVP_EncryptUpdate(&e_ctx, encrypted_master_key, &encrypted_len,
- decrypted_master_key, KEY_LEN_BYTES)) {
- SLOGE("EVP_EncryptUpdate failed\n");
- return -1;
- }
- if (! EVP_EncryptFinal(&e_ctx, encrypted_master_key + encrypted_len, &final_len)) {
- SLOGE("EVP_EncryptFinal failed\n");
- return -1;
- }
-
- if (encrypted_len + final_len != KEY_LEN_BYTES) {
- SLOGE("EVP_Encryption length check failed with %d, %d bytes\n", encrypted_len, final_len);
- return -1;
- } else {
- return 0;
- }
-}
-
static int decrypt_master_key(char *passwd, unsigned char *salt,
unsigned char *encrypted_master_key,
unsigned char *decrypted_master_key)
{
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+ if (using_samsung_encryption) {
+ property_set("rw.km_fips_status", "ready");
+ return decrypt_EDK((dek_t*)decrypted_master_key, (edk_payload_t*)encrypted_master_key, passwd);
+ }
+#endif
+
unsigned char ikey[32+32] = { 0 }; /* Big enough to hold a 256 bit key and 256 bit IV */
EVP_CIPHER_CTX d_ctx;
int decrypted_len, final_len;
@@ -539,25 +420,9 @@ static int decrypt_master_key(char *passwd, unsigned char *salt,
}
}
-static int create_encrypted_random_key(char *passwd, unsigned char *master_key, unsigned char *salt)
-{
- int fd;
- unsigned char key_buf[KEY_LEN_BYTES];
- EVP_CIPHER_CTX e_ctx;
- int encrypted_len, final_len;
-
- /* Get some random bits for a key */
- fd = open("/dev/urandom", O_RDONLY);
- read(fd, key_buf, sizeof(key_buf));
- read(fd, salt, SALT_LEN);
- close(fd);
-
- /* Now encrypt it with the password */
- return encrypt_master_key(passwd, salt, key_buf, master_key);
-}
-
-static int get_orig_mount_parms(char *mount_point, char *fs_type, char *real_blkdev,
- unsigned long *mnt_flags, char *fs_options)
+static int get_orig_mount_parms(
+ const char *mount_point, char *fs_type, char *real_blkdev,
+ unsigned long *mnt_flags, char *fs_options)
{
char mount_point2[PROPERTY_VALUE_MAX];
char fs_flags[PROPERTY_VALUE_MAX];
@@ -577,197 +442,34 @@ static int get_orig_mount_parms(char *mount_point, char *fs_type, char *real_blk
return 0;
}
-static int wait_and_unmount(char *mountpoint)
-{
- int i, rc;
-#define WAIT_UNMOUNT_COUNT 20
-
- /* Now umount the tmpfs filesystem */
- for (i=0; i<WAIT_UNMOUNT_COUNT; i++) {
- if (umount(mountpoint)) {
- if (errno == EINVAL) {
- /* EINVAL is returned if the directory is not a mountpoint,
- * i.e. there is no filesystem mounted there. So just get out.
- */
- break;
- }
- sleep(1);
- i++;
- } else {
- break;
- }
- }
-
- if (i < WAIT_UNMOUNT_COUNT) {
- SLOGD("unmounting %s succeeded\n", mountpoint);
- rc = 0;
- } else {
- SLOGE("unmounting %s failed\n", mountpoint);
- rc = -1;
- }
-
- return rc;
-}
-
-#define DATA_PREP_TIMEOUT 100
-static int prep_data_fs(void)
+static int get_orig_mount_parms_sd(
+ const char *mount_point, char *fs_type, char *real_blkdev)
{
- int i;
-
- /* Do the prep of the /data filesystem */
- property_set("vold.post_fs_data_done", "0");
- property_set("vold.decrypt", "trigger_post_fs_data");
- SLOGD("Just triggered post_fs_data\n");
-
- /* Wait a max of 25 seconds, hopefully it takes much less */
- for (i=0; i<DATA_PREP_TIMEOUT; i++) {
- char p[PROPERTY_VALUE_MAX];
-
- property_get("vold.post_fs_data_done", p, "0");
- if (*p == '1') {
- break;
- } else {
- usleep(250000);
- }
- }
- if (i == DATA_PREP_TIMEOUT) {
- /* Ugh, we failed to prep /data in time. Bail. */
- return -1;
- } else {
- SLOGD("post_fs_data done\n");
- return 0;
- }
-}
-
-int cryptfs_restart(void)
-{
- char fs_type[32];
- char real_blkdev[MAXPATHLEN];
- char crypto_blkdev[MAXPATHLEN];
- char fs_options[256];
- unsigned long mnt_flags;
- struct stat statbuf;
- int rc = -1, i;
- static int restart_successful = 0;
-
- /* Validate that it's OK to call this routine */
- if (! master_key_saved) {
- SLOGE("Encrypted filesystem not validated, aborting");
- return -1;
- }
-
- if (restart_successful) {
- SLOGE("System already restarted with encrypted disk, aborting");
- return -1;
- }
-
- /* Here is where we shut down the framework. The init scripts
- * start all services in one of three classes: core, main or late_start.
- * On boot, we start core and main. Now, we stop main, but not core,
- * as core includes vold and a few other really important things that
- * we need to keep running. Once main has stopped, we should be able
- * to umount the tmpfs /data, then mount the encrypted /data.
- * We then restart the class main, and also the class late_start.
- * At the moment, I've only put a few things in late_start that I know
- * are not needed to bring up the framework, and that also cause problems
- * with unmounting the tmpfs /data, but I hope to add add more services
- * to the late_start class as we optimize this to decrease the delay
- * till the user is asked for the password to the filesystem.
- */
+ char mount_point2[PROPERTY_VALUE_MAX];
- /* The init files are setup to stop the class main when vold.decrypt is
- * set to trigger_reset_main.
- */
- property_set("vold.decrypt", "trigger_reset_main");
- SLOGD("Just asked init to shut down class main\n");
+ property_get("ro.crypto.sd_fs_type", fs_type, "");
+ property_get("ro.crypto.sd_fs_real_blkdev", real_blkdev, "");
+ property_get("ro.crypto.sd_fs_mnt_point", mount_point2, "");
- /* Now that the framework is shutdown, we should be able to umount()
- * the tmpfs filesystem, and mount the real one.
- */
-
- property_get("ro.crypto.fs_crypto_blkdev", crypto_blkdev, "");
- if (strlen(crypto_blkdev) == 0) {
- SLOGE("fs_crypto_blkdev not set\n");
+ if (strcmp(mount_point, mount_point2)) {
+ /* Consistency check. These should match. If not, something odd happened. */
return -1;
}
- if (! get_orig_mount_parms(DATA_MNT_POINT, fs_type, real_blkdev, &mnt_flags, fs_options)) {
- SLOGD("Just got orig mount parms\n");
-
- if (! (rc = wait_and_unmount(DATA_MNT_POINT)) ) {
- /* If that succeeded, then mount the decrypted filesystem */
- mount(crypto_blkdev, DATA_MNT_POINT, fs_type, mnt_flags, fs_options);
-
- property_set("vold.decrypt", "trigger_load_persist_props");
- /* Create necessary paths on /data */
- if (prep_data_fs()) {
- return -1;
- }
-
- /* startup service classes main and late_start */
- property_set("vold.decrypt", "trigger_restart_framework");
- SLOGD("Just triggered restart_framework\n");
-
- /* Give it a few moments to get started */
- sleep(1);
- }
- }
-
- if (rc == 0) {
- restart_successful = 1;
- }
-
- return rc;
-}
-
-static int do_crypto_complete(char *mount_point)
-{
- struct crypt_mnt_ftr crypt_ftr;
- unsigned char encrypted_master_key[32];
- unsigned char salt[SALT_LEN];
- char real_blkdev[MAXPATHLEN];
- char fs_type[PROPERTY_VALUE_MAX];
- char fs_options[PROPERTY_VALUE_MAX];
- unsigned long mnt_flags;
- char encrypted_state[PROPERTY_VALUE_MAX];
-
- property_get("ro.crypto.state", encrypted_state, "");
- if (strcmp(encrypted_state, "encrypted") ) {
- SLOGE("not running with encryption, aborting");
- return 1;
- }
-
- if (get_orig_mount_parms(mount_point, fs_type, real_blkdev, &mnt_flags, fs_options)) {
- SLOGE("Error reading original mount parms for mount point %s\n", mount_point);
- return -1;
- }
-
- if (get_crypt_ftr_and_key(real_blkdev, &crypt_ftr, encrypted_master_key, salt)) {
- SLOGE("Error getting crypt footer and key\n");
- return -1;
- }
-
- if (crypt_ftr.flags & CRYPT_ENCRYPTION_IN_PROGRESS) {
- SLOGE("Encryption process didn't finish successfully\n");
- return -2; /* -2 is the clue to the UI that there is no usable data on the disk,
- * and give the user an option to wipe the disk */
- }
-
- /* We passed the test! We shall diminish, and return to the west */
- return 0;
+ return 0;
}
-static int test_mount_encrypted_fs(char *passwd, char *mount_point, char *label)
+static int test_mount_encrypted_fs(
+ char *passwd, char *mount_point, char *label, char *crypto_blkdev)
{
struct crypt_mnt_ftr crypt_ftr;
/* Allocate enough space for a 256 bit key, but we may use less */
- unsigned char encrypted_master_key[32], decrypted_master_key[32];
+ unsigned char encrypted_master_key[256], decrypted_master_key[32];
unsigned char salt[SALT_LEN];
- char crypto_blkdev[MAXPATHLEN];
char real_blkdev[MAXPATHLEN];
char fs_type[PROPERTY_VALUE_MAX];
char fs_options[PROPERTY_VALUE_MAX];
- char tmp_mount_point[64];
+ char tmp_mount_point[MAXPATHLEN];
unsigned long mnt_flags;
unsigned int orig_failed_decrypt_count;
char encrypted_state[PROPERTY_VALUE_MAX];
@@ -775,7 +477,7 @@ static int test_mount_encrypted_fs(char *passwd, char *mount_point, char *label)
property_get("ro.crypto.state", encrypted_state, "");
if ( master_key_saved || strcmp(encrypted_state, "encrypted") ) {
- printf("encrypted fs already validated or not running with encryption, aborting");
+ printf("encrypted fs already validated or not running with encryption, aborting %s\n", encrypted_state);
return -1;
}
@@ -789,15 +491,15 @@ static int test_mount_encrypted_fs(char *passwd, char *mount_point, char *label)
return -1;
}
- printf("crypt_ftr->fs_size = %lld\n", crypt_ftr.fs_size);
+ //printf("crypt_ftr->fs_size = %lld\n", crypt_ftr.fs_size);
orig_failed_decrypt_count = crypt_ftr.failed_decrypt_count;
if (! (crypt_ftr.flags & CRYPT_MNT_KEY_UNENCRYPTED) ) {
decrypt_master_key(passwd, salt, encrypted_master_key, decrypted_master_key);
}
- if (create_crypto_blk_dev(&crypt_ftr, decrypted_master_key,
- real_blkdev, crypto_blkdev, label)) {
+ if (create_crypto_blk_dev(&crypt_ftr, decrypted_master_key, real_blkdev,
+ crypto_blkdev, label)) {
printf("Error creating decrypted block device\n");
return -1;
}
@@ -811,7 +513,7 @@ static int test_mount_encrypted_fs(char *passwd, char *mount_point, char *label)
*/
sprintf(tmp_mount_point, "%s/tmp_mnt", mount_point);
mkdir(tmp_mount_point, 0755);
- if ( mount(crypto_blkdev, tmp_mount_point, "ext4", MS_RDONLY, "") ) {
+ if ( mount(crypto_blkdev, tmp_mount_point, fs_type, MS_RDONLY, "") ) {
printf("Error temp mounting decrypted block device\n");
delete_crypto_blk_dev(label);
crypt_ftr.failed_decrypt_count++;
@@ -823,9 +525,7 @@ static int test_mount_encrypted_fs(char *passwd, char *mount_point, char *label)
crypt_ftr.failed_decrypt_count = 0;
}
- if (orig_failed_decrypt_count != crypt_ftr.failed_decrypt_count) {
- put_crypt_ftr_and_key(real_blkdev, &crypt_ftr, 0, 0);
- }
+ rmdir(tmp_mount_point);
if (crypt_ftr.failed_decrypt_count) {
/* We failed to mount the device, so return an error */
@@ -840,7 +540,7 @@ static int test_mount_encrypted_fs(char *passwd, char *mount_point, char *label)
/* Also save a the master key so we can reencrypted the key
* the key when we want to change the password on it.
*/
- memcpy(saved_master_key, decrypted_master_key, KEY_LEN_BYTES);
+ memcpy(saved_master_key, decrypted_master_key, sizeof(saved_master_key));
saved_data_blkdev = strdup(real_blkdev);
saved_mount_point = strdup(mount_point);
master_key_saved = 1;
@@ -850,315 +550,152 @@ static int test_mount_encrypted_fs(char *passwd, char *mount_point, char *label)
return rc;
}
-/* Called by vold when it wants to undo the crypto mapping of a volume it
- * manages. This is usually in response to a factory reset, when we want
- * to undo the crypto mapping so the volume is formatted in the clear.
- */
-int cryptfs_revert_volume(const char *label)
+static int test_mount_encrypted_fs_sd(
+ const char *passwd, const char *mount_point, const char *label)
{
- return delete_crypto_blk_dev((char *)label);
-}
-
-/*
- * Called by vold when it's asked to mount an encrypted, nonremovable volume.
- * Setup a dm-crypt mapping, use the saved master key from
- * setting up the /data mapping, and return the new device path.
- */
-int cryptfs_setup_volume(const char *label, int major, int minor,
- char *crypto_sys_path, unsigned int max_path,
- int *new_major, int *new_minor)
-{
- char real_blkdev[MAXPATHLEN], crypto_blkdev[MAXPATHLEN];
- struct crypt_mnt_ftr sd_crypt_ftr;
- unsigned char key[32], salt[32];
- struct stat statbuf;
- int nr_sec, fd;
-
- sprintf(real_blkdev, "/dev/block/vold/%d:%d", major, minor);
-
- /* Just want the footer, but gotta get it all */
- get_crypt_ftr_and_key(saved_data_blkdev, &sd_crypt_ftr, key, salt);
-
- /* Update the fs_size field to be the size of the volume */
- fd = open(real_blkdev, O_RDONLY);
- nr_sec = get_blkdev_size(fd);
- close(fd);
- if (nr_sec == 0) {
- SLOGE("Cannot get size of volume %s\n", real_blkdev);
- return -1;
- }
-
- sd_crypt_ftr.fs_size = nr_sec;
- create_crypto_blk_dev(&sd_crypt_ftr, saved_master_key, real_blkdev,
- crypto_blkdev, label);
-
- stat(crypto_blkdev, &statbuf);
- *new_major = MAJOR(statbuf.st_rdev);
- *new_minor = MINOR(statbuf.st_rdev);
-
- /* Create path to sys entry for this block device */
- snprintf(crypto_sys_path, max_path, "/devices/virtual/block/%s", strrchr(crypto_blkdev, '/')+1);
-
- return 0;
-}
-
-int cryptfs_crypto_complete(void)
-{
- return do_crypto_complete("/data");
-}
-
-int cryptfs_check_passwd(char *passwd)
-{
- int rc = -1;
-
- rc = test_mount_encrypted_fs(passwd, DATA_MNT_POINT, "userdata");
-
- return rc;
-}
-
-int cryptfs_verify_passwd(char *passwd)
-{
- struct crypt_mnt_ftr crypt_ftr;
- /* Allocate enough space for a 256 bit key, but we may use less */
- unsigned char encrypted_master_key[32], decrypted_master_key[32];
- unsigned char salt[SALT_LEN];
char real_blkdev[MAXPATHLEN];
- char fs_type[PROPERTY_VALUE_MAX];
- char fs_options[PROPERTY_VALUE_MAX];
- unsigned long mnt_flags;
+ char crypto_blkdev[MAXPATHLEN];
+ char tmp_mount_point[MAXPATHLEN];
char encrypted_state[PROPERTY_VALUE_MAX];
+ char fs_type[PROPERTY_VALUE_MAX];
int rc;
property_get("ro.crypto.state", encrypted_state, "");
- if (strcmp(encrypted_state, "encrypted") ) {
- SLOGE("device not encrypted, aborting");
- return -2;
- }
-
- if (!master_key_saved) {
- SLOGE("encrypted fs not yet mounted, aborting");
+ if ( !master_key_saved || strcmp(encrypted_state, "encrypted") ) {
+ printf("encrypted fs not yet validated or not running with encryption, aborting\n");
return -1;
}
- if (!saved_mount_point) {
- SLOGE("encrypted fs failed to save mount point, aborting");
+ if (get_orig_mount_parms_sd(mount_point, fs_type, real_blkdev)) {
+ printf("Error reading original mount parms for mount point %s\n", mount_point);
return -1;
}
- if (get_orig_mount_parms(saved_mount_point, fs_type, real_blkdev, &mnt_flags, fs_options)) {
- SLOGE("Error reading original mount parms for mount point %s\n", saved_mount_point);
+ rc = cryptfs_setup_volume(label, real_blkdev, crypto_blkdev);
+ if(rc){
+ printf("Error setting up cryptfs volume %s\n", real_blkdev);
return -1;
}
- if (get_crypt_ftr_and_key(real_blkdev, &crypt_ftr, encrypted_master_key, salt)) {
- SLOGE("Error getting crypt footer and key\n");
- return -1;
- }
-
- if (crypt_ftr.flags & CRYPT_MNT_KEY_UNENCRYPTED) {
- /* If the device has no password, then just say the password is valid */
- rc = 0;
+ sprintf(tmp_mount_point, "%s/tmp_mnt", mount_point);
+ mkdir(tmp_mount_point, 0755);
+ if ( mount(crypto_blkdev, tmp_mount_point, fs_type, MS_RDONLY, "") ) {
+ printf("Error temp mounting decrypted block device\n");
+ delete_crypto_blk_dev(label);
} else {
- decrypt_master_key(passwd, salt, encrypted_master_key, decrypted_master_key);
- if (!memcmp(decrypted_master_key, saved_master_key, crypt_ftr.keysize)) {
- /* They match, the password is correct */
- rc = 0;
- } else {
- /* If incorrect, sleep for a bit to prevent dictionary attacks */
- sleep(1);
- rc = 1;
- }
- }
+ /* Success, so just umount and we'll mount it properly when we restart
+ * the framework.
+ */
+ umount(tmp_mount_point);
- return rc;
-}
-
-/* Initialize a crypt_mnt_ftr structure. The keysize is
- * defaulted to 16 bytes, and the filesystem size to 0.
- * Presumably, at a minimum, the caller will update the
- * filesystem size and crypto_type_name after calling this function.
- */
-static void cryptfs_init_crypt_mnt_ftr(struct crypt_mnt_ftr *ftr)
-{
- ftr->magic = CRYPT_MNT_MAGIC;
- ftr->major_version = 1;
- ftr->minor_version = 0;
- ftr->ftr_size = sizeof(struct crypt_mnt_ftr);
- ftr->flags = 0;
- ftr->keysize = KEY_LEN_BYTES;
- ftr->spare1 = 0;
- ftr->fs_size = 0;
- ftr->failed_decrypt_count = 0;
- ftr->crypto_type_name[0] = '\0';
-}
-
-static int cryptfs_enable_wipe(char *crypto_blkdev, off64_t size, int type)
-{
- char cmdline[256];
- int rc = -1;
-
- if (type == EXT4_FS) {
- snprintf(cmdline, sizeof(cmdline), "/system/bin/make_ext4fs -a /data -l %lld %s",
- size * 512, crypto_blkdev);
- SLOGI("Making empty filesystem with command %s\n", cmdline);
- } else if (type== FAT_FS) {
- snprintf(cmdline, sizeof(cmdline), "/system/bin/newfs_msdos -F 32 -O android -c 8 -s %lld %s",
- size, crypto_blkdev);
- SLOGI("Making empty filesystem with command %s\n", cmdline);
- } else {
- SLOGE("cryptfs_enable_wipe(): unknown filesystem type %d\n", type);
- return -1;
+ property_set("ro.crypto.sd_fs_crypto_blkdev", crypto_blkdev);
}
- if (system(cmdline)) {
- SLOGE("Error creating empty filesystem on %s\n", crypto_blkdev);
- } else {
- SLOGD("Successfully created empty filesystem on %s\n", crypto_blkdev);
- rc = 0;
- }
+ rmdir(tmp_mount_point);
return rc;
}
-static inline int unix_read(int fd, void* buff, int len)
-{
- int ret;
- do { ret = read(fd, buff, len); } while (ret < 0 && errno == EINTR);
- return ret;
-}
-
-static inline int unix_write(int fd, const void* buff, int len)
-{
- int ret;
- do { ret = write(fd, buff, len); } while (ret < 0 && errno == EINTR);
- return ret;
-}
-
-#define CRYPT_INPLACE_BUFSIZE 4096
-#define CRYPT_SECTORS_PER_BUFSIZE (CRYPT_INPLACE_BUFSIZE / 512)
-static int cryptfs_enable_inplace(char *crypto_blkdev, char *real_blkdev, off64_t size,
- off64_t *size_already_done, off64_t tot_size)
+/*
+ * Called by vold when it's asked to mount an encrypted, nonremovable volume.
+ * Setup a dm-crypt mapping, use the saved master key from
+ * setting up the /data mapping, and return the new device path.
+ */
+int cryptfs_setup_volume(const char *label, const char *real_blkdev, char *crypto_blkdev)
{
- int realfd, cryptofd;
- char *buf[CRYPT_INPLACE_BUFSIZE];
- int rc = -1;
- off64_t numblocks, i, remainder;
- off64_t one_pct, cur_pct, new_pct;
- off64_t blocks_already_done, tot_numblocks;
+ struct crypt_mnt_ftr sd_crypt_ftr;
+ unsigned char key[256], salt[32];
+ struct stat statbuf;
+ int nr_sec, fd, rc;
- if ( (realfd = open(real_blkdev, O_RDONLY)) < 0) {
- SLOGE("Error opening real_blkdev %s for inplace encrypt\n", real_blkdev);
- return -1;
- }
+ /* Just want the footer, but gotta get it all */
+ get_crypt_ftr_and_key(saved_data_blkdev, &sd_crypt_ftr, key, salt);
- if ( (cryptofd = open(crypto_blkdev, O_WRONLY)) < 0) {
- SLOGE("Error opening crypto_blkdev %s for inplace encrypt\n", crypto_blkdev);
- close(realfd);
+ /* Update the fs_size field to be the size of the volume */
+ fd = open(real_blkdev, O_RDONLY);
+ nr_sec = get_blkdev_size(fd);
+ close(fd);
+ if (nr_sec == 0) {
+ SLOGE("Cannot get size of volume %s\n", real_blkdev);
return -1;
}
- /* This is pretty much a simple loop of reading 4K, and writing 4K.
- * The size passed in is the number of 512 byte sectors in the filesystem.
- * So compute the number of whole 4K blocks we should read/write,
- * and the remainder.
- */
- numblocks = size / CRYPT_SECTORS_PER_BUFSIZE;
- remainder = size % CRYPT_SECTORS_PER_BUFSIZE;
- tot_numblocks = tot_size / CRYPT_SECTORS_PER_BUFSIZE;
- blocks_already_done = *size_already_done / CRYPT_SECTORS_PER_BUFSIZE;
-
- SLOGE("Encrypting filesystem in place...");
-
- one_pct = tot_numblocks / 100;
- cur_pct = 0;
- /* process the majority of the filesystem in blocks */
- for (i=0; i<numblocks; i++) {
- new_pct = (i + blocks_already_done) / one_pct;
- if (new_pct > cur_pct) {
- char buf[8];
-
- cur_pct = new_pct;
- snprintf(buf, sizeof(buf), "%lld", cur_pct);
- property_set("vold.encrypt_progress", buf);
- }
- if (unix_read(realfd, buf, CRYPT_INPLACE_BUFSIZE) <= 0) {
- SLOGE("Error reading real_blkdev %s for inplace encrypt\n", crypto_blkdev);
- goto errout;
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+ if(using_samsung_encryption) {
+ if(!access("/efs/essiv", R_OK)){
+ strcpy(sd_crypt_ftr.crypto_type_name, "aes-cbc-plain:sha1");
}
- if (unix_write(cryptofd, buf, CRYPT_INPLACE_BUFSIZE) <= 0) {
- SLOGE("Error writing crypto_blkdev %s for inplace encrypt\n", crypto_blkdev);
- goto errout;
+ else if(!access("/efs/cryptprop_essiv", R_OK)){
+ strcpy(sd_crypt_ftr.crypto_type_name, "aes-cbc-essiv:sha256");
}
}
+#endif
- /* Do any remaining sectors */
- for (i=0; i<remainder; i++) {
- if (unix_read(realfd, buf, 512) <= 0) {
- SLOGE("Error reading rival sectors from real_blkdev %s for inplace encrypt\n", crypto_blkdev);
- goto errout;
- }
- if (unix_write(cryptofd, buf, 512) <= 0) {
- SLOGE("Error writing final sectors to crypto_blkdev %s for inplace encrypt\n", crypto_blkdev);
- goto errout;
- }
- }
-
- *size_already_done += size;
- rc = 0;
+ sd_crypt_ftr.fs_size = nr_sec;
+ rc = create_crypto_blk_dev(
+ &sd_crypt_ftr, saved_master_key, real_blkdev, crypto_blkdev, label);
-errout:
- close(realfd);
- close(cryptofd);
+ stat(crypto_blkdev, &statbuf);
return rc;
}
-#define CRYPTO_ENABLE_WIPE 1
-#define CRYPTO_ENABLE_INPLACE 2
-
-#define FRAMEWORK_BOOT_WAIT 60
-
-static inline int should_encrypt(struct volume_info *volume)
-{
- return (volume->flags & (VOL_ENCRYPTABLE | VOL_NONREMOVABLE)) ==
- (VOL_ENCRYPTABLE | VOL_NONREMOVABLE);
-}
-
-int cryptfs_enable(char *howarg, char *passwd)
+int cryptfs_crypto_complete(void)
{
- // Code removed because it needs other parts of vold that aren't needed for decryption
- return -1;
+ return -1;
}
-int cryptfs_changepw(char *newpw)
+int cryptfs_check_passwd(const char *passwd)
{
- struct crypt_mnt_ftr crypt_ftr;
- unsigned char encrypted_master_key[KEY_LEN_BYTES], decrypted_master_key[KEY_LEN_BYTES];
- unsigned char salt[SALT_LEN];
- char real_blkdev[MAXPATHLEN];
+ char pwbuf[256];
+ char crypto_blkdev_data[MAXPATHLEN];
+ int rc = -1;
- /* This is only allowed after we've successfully decrypted the master key */
- if (! master_key_saved) {
- SLOGE("Key not saved, aborting");
- return -1;
- }
+ strcpy(pwbuf, passwd);
+ rc = test_mount_encrypted_fs(pwbuf, DATA_MNT_POINT, "userdata", crypto_blkdev_data);
- property_get("ro.crypto.fs_real_blkdev", real_blkdev, "");
- if (strlen(real_blkdev) == 0) {
- SLOGE("Can't find real blkdev");
- return -1;
- }
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+ if(using_samsung_encryption) {
- /* get key */
- if (get_crypt_ftr_and_key(real_blkdev, &crypt_ftr, encrypted_master_key, salt)) {
- SLOGE("Error getting crypt footer and key");
- return -1;
+ int rc2 = 1;
+#ifndef RECOVERY_SDCARD_ON_DATA
+ // internal storage for non data/media devices
+ if(!rc) {
+ strcpy(pwbuf, passwd);
+ rc2 = test_mount_encrypted_fs_sd(
+ pwbuf, EXPAND(TW_INTERNAL_STORAGE_PATH),
+ EXPAND(TW_INTERNAL_STORAGE_MOUNT_POINT));
+ }
+#endif
+#ifdef TW_EXTERNAL_STORAGE_PATH
+ printf("Temp mounting /data\n");
+ // mount data so mount_ecryptfs_drive can access edk in /data/system/
+ rc2 = mount(crypto_blkdev_data, DATA_MNT_POINT, CRYPTO_FS_TYPE, MS_RDONLY, "");
+ // external sd
+ char decrypt_external[256], external_blkdev[256];
+ property_get("ro.crypto.external_encrypted", decrypt_external, "0");
+ // First we have to mount the external storage
+ if (!rc2 && strcmp(decrypt_external, "1") == 0) {
+ printf("Mounting external...\n");
+ property_get("ro.crypto.external_blkdev", external_blkdev, "");
+ rc2 = mount(
+ external_blkdev, EXPAND(TW_EXTERNAL_STORAGE_PATH),
+ "vfat", MS_RDONLY, "");
+ }
+ // Mount the external storage as ecryptfs so that ecryptfs can act as a pass-through
+ if (!rc2) {
+ printf("Mounting external with ecryptfs...\n");
+ strcpy(pwbuf, passwd);
+ rc2 = mount_ecryptfs_drive(
+ pwbuf, EXPAND(TW_EXTERNAL_STORAGE_PATH),
+ EXPAND(TW_EXTERNAL_STORAGE_PATH), 0);
+ } else {
+ printf("Unable to mount external storage with ecryptfs.\n");
+ umount(EXPAND(TW_EXTERNAL_STORAGE_PATH));
+ }
+ umount(DATA_MNT_POINT);
}
-
- encrypt_master_key(newpw, salt, saved_master_key, encrypted_master_key);
-
- /* save the key */
- put_crypt_ftr_and_key(real_blkdev, &crypt_ftr, encrypted_master_key, salt);
-
- return 0;
+#endif // #ifdef TW_EXTERNAL_STORAGE_PATH
+#endif // #ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+ return rc;
}
diff --git a/crypto/ics/cryptfs.h b/crypto/ics/cryptfs.h
index 1c1bc1aea..e2fb7a7f3 100644
--- a/crypto/ics/cryptfs.h
+++ b/crypto/ics/cryptfs.h
@@ -25,6 +25,13 @@
* of the partition.
*/
+#ifndef __CRYPTFS_H__
+#define __CRYPTFS_H__
+
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+#include "../libcrypt_samsung/include/libcrypt_samsung.h"
+#endif
+
#define CRYPT_FOOTER_OFFSET 0x4000
#define MAX_CRYPTO_TYPE_NAME_LEN 64
@@ -37,11 +44,16 @@
#define CRYPT_ENCRYPTION_IN_PROGRESS 0x2 /* Set when starting encryption,
* clear when done before rebooting */
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+#define CRYPT_MNT_MAGIC_SAMSUNG 0xD0B5B1C5
+#endif
#define CRYPT_MNT_MAGIC 0xD0B5B1C4
#define __le32 unsigned int
#define __le16 unsigned short int
+#pragma pack(1)
+
struct crypt_mnt_ftr {
__le32 magic; /* See above */
__le16 major_version;
@@ -53,37 +65,25 @@ struct crypt_mnt_ftr {
__le64 fs_size; /* Size of the encrypted fs, in 512 byte sectors */
__le32 failed_decrypt_count; /* count of # of failed attempts to decrypt and
mount, set to 0 on successful mount */
- unsigned char crypto_type_name[MAX_CRYPTO_TYPE_NAME_LEN]; /* The type of encryption
+ char crypto_type_name[MAX_CRYPTO_TYPE_NAME_LEN]; /* The type of encryption
needed to decrypt this
partition, null terminated */
+#ifdef TW_INCLUDE_CRYPTO_SAMSUNG
+ edk_payload_t edk_payload;
+ __le32 unknown_end;
+#endif
};
-struct volume_info {
- unsigned int size;
- unsigned int flags;
- struct crypt_mnt_ftr crypt_ftr;
- char mnt_point[256];
- char blk_dev[256];
- char crypto_blkdev[256];
- char label[256];
-};
-#define VOL_NONREMOVABLE 0x1
-#define VOL_ENCRYPTABLE 0x2
+#pragma pack()
+
#ifdef __cplusplus
extern "C" {
#endif
- int cryptfs_crypto_complete(void);
- int cryptfs_check_passwd(char *pw);
- int cryptfs_verify_passwd(char *newpw);
- int cryptfs_restart(void);
- int cryptfs_enable(char *flag, char *passwd);
- int cryptfs_changepw(char *newpw);
- int cryptfs_setup_volume(const char *label, int major, int minor,
- char *crypto_dev_path, unsigned int max_pathlen,
- int *new_major, int *new_minor);
- int cryptfs_revert_volume(const char *label);
+ int cryptfs_check_passwd(const char *pw);
#ifdef __cplusplus
}
#endif
+#endif // __CRYPTFS_H__
+
diff --git a/crypto/libcrypt_samsung/Android.mk b/crypto/libcrypt_samsung/Android.mk
new file mode 100644
index 000000000..6e0e86903
--- /dev/null
+++ b/crypto/libcrypt_samsung/Android.mk
@@ -0,0 +1,11 @@
+LOCAL_PATH := $(call my-dir)
+
+ifneq ($(TARGET_SIMULATOR),true)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libcrypt_samsung
+LOCAL_SRC_FILES := $(LOCAL_MODULE).c
+LOCAL_MODULE_TAGS := eng
+include $(BUILD_STATIC_LIBRARY)
+
+endif
diff --git a/crypto/libcrypt_samsung/include/libcrypt_samsung.h b/crypto/libcrypt_samsung/include/libcrypt_samsung.h
new file mode 100644
index 000000000..48c7b3e6d
--- /dev/null
+++ b/crypto/libcrypt_samsung/include/libcrypt_samsung.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2013 a3955269 all rights reversed, no rights reserved.
+ */
+
+#ifndef __LIBCRYPT_SAMSUNG_H__
+#define __LIBCRYPT_SAMSUNG_H__
+
+//////////////////////////////////////////////////////////////////////////////
+// Name Address Ordinal
+// ---- ------- -------
+// SECKM_AES_set_encrypt_key 000010D8
+// SECKM_AES_set_decrypt_key 00001464
+// SECKM_AES_encrypt 00001600
+// SECKM_AES_decrypt 00001A10
+// SECKM_aes_selftest 00001D94
+// verify_EDK 00001F7C
+// encrypt_dek 00001FC8
+// decrypt_EDK 000020D4
+// change_EDK 0000218C
+// generate_dek_salt 000022A4
+// create_EDK 000023A0
+// free_DEK 000024DC
+// alloc_DEK 000024F4
+// SECKM_HMAC_SHA256 00002500
+// SECKM_HMAC_SHA256_selftest 00002690
+// pbkdf 000026FC
+// pbkdf_selftest 00002898
+// _SECKM_PRNG_get16 00002958
+// SECKM_PRNG_get16 00002C48
+// _SECKM_PRNG_init 00002C54
+// SECKM_PRNG_selftest 00002F38
+// SECKM_PRNG_set_seed 00002FF0
+// SECKM_PRNG_init 00002FF8
+// SECKM_SHA256_Transform 00003004
+// SECKM_SHA256_Final 000031D8
+// SECKM_SHA256_Update 00003330
+// SECKM_SHA256_Init 000033FC
+// SECKM_SHA2_selftest 00003430
+// integrity_check 00003488
+// update_system_property 00003580
+// setsec_km_fips_status 00003630
+// _all_checks 00003684
+// get_fips_status 000036D4
+
+
+// EDK Payload is defined as:
+// Encrypted DEK – EDK itself
+// HMAC of EDK (32 bytes ???)
+// Salt 16 bytes
+
+#define EDK_MAGIC 0x1001e4b1
+
+#pragma pack(1)
+
+typedef struct {
+ unsigned int magic; // EDK_MAGIC
+ unsigned int flags; // 2
+ unsigned int zeros[6];
+} dek_t;
+
+typedef struct {
+ unsigned char data[32];
+} edk_t;
+
+
+// size 0x70 -> 112
+typedef struct {
+ dek_t dek;
+ edk_t edk;
+ unsigned char hmac[32];
+ unsigned char salt[16];
+} edk_payload_t;
+
+#pragma pack()
+
+//////////////////////////////////////////////////////////////////////////////
+
+int decrypt_EDK(
+ dek_t *dek, const edk_payload_t *edk, /*const*/ char *passwd);
+
+typedef int (*decrypt_EDK_t)(
+ dek_t *dek, const edk_payload_t *edk, /*const*/ char *passwd);
+
+
+int verify_EDK(const edk_payload_t *edk, const char *passwd);
+//change_EDK()
+//create_EDK()
+
+// internally just mallocs 32 bytes
+dek_t *alloc_DEK();
+void free_DEK(dek_t *dek);
+//encrypt_dek()
+//generate_dek_salt()
+
+//pbkdf(_buf_, "passwordPASSWORDpassword", 0x18, "saltSALTsaltSALTsaltSALTsaltSALTsalt", 0x24, 0x1000, 0x140);
+int pbkdf(
+ void *buf, void *pw, int pwlen, void *salt, int saltlen, int hashcnt,
+ int keylen);
+
+// getprop("rw.km_fips_status")
+// "ready, undefined, error_selftest, error_integrity"
+int get_fips_status();
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// libsec_ecryptfs.so (internally uses libkeyutils.so)
+//
+// Name Address Ordinal
+// ---- ------- -------
+// unmount_ecryptfs_drive 00000A78
+// mount_ecryptfs_drive 00000B48
+// fips_read_edk 00000E44
+// fips_save_edk 00000EA4
+// fips_create_edk 00000F20
+// fips_change_password 00001018
+// fips_delete_edk 00001124
+//
+
+// might depend on /data beeing mounted for reading /data/system/edk_p_sd
+//
+// filter
+// 0: building options without file encryption filtering.
+// 1: building options with media files filtering.
+// 2: building options with all new files filtering.
+
+int mount_ecryptfs_drive(
+ const char *passwd, const char *source, const char *target, int filter);
+
+typedef int (*mount_ecryptfs_drive_t)(
+ const char *passwd, const char *source, const char *target, int filter);
+
+// calls 2 times umount2(source, MNT_EXPIRE)
+int unmount_ecryptfs_drive(
+ const char *source);
+
+//////////////////////////////////////////////////////////////////////////////
+
+#endif // #ifndef __LIBCRYPT_SAMSUNG_H__
+
+//////////////////////////////////////////////////////////////////////////////
+
diff --git a/crypto/libcrypt_samsung/libcrypt_samsung.c b/crypto/libcrypt_samsung/libcrypt_samsung.c
new file mode 100644
index 000000000..4b9b9c5d5
--- /dev/null
+++ b/crypto/libcrypt_samsung/libcrypt_samsung.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2013 a3955269 all rights reversed, no rights reserved.
+ */
+
+//////////////////////////////////////////////////////////////////////////////
+
+#include <string.h>
+#include <stdio.h>
+#include <dlfcn.h>
+
+#include "include/libcrypt_samsung.h"
+
+//////////////////////////////////////////////////////////////////////////////
+void xconvert_key_to_hex_ascii(unsigned char *master_key, unsigned int keysize,
+ char *master_key_ascii)
+{
+ unsigned int i, a;
+ unsigned char nibble;
+
+ for (i=0, a=0; i<keysize; i++, a+=2) {
+ /* For each byte, write out two ascii hex digits */
+ nibble = (master_key[i] >> 4) & 0xf;
+ master_key_ascii[a] = nibble + (nibble > 9 ? 0x37 : 0x30);
+
+ nibble = master_key[i] & 0xf;
+ master_key_ascii[a+1] = nibble + (nibble > 9 ? 0x37 : 0x30);
+ }
+
+ /* Add the null termination */
+ master_key_ascii[a] = '\0';
+
+}
+
+int decrypt_EDK(
+ dek_t *dek, const edk_payload_t *edk, /*const*/ char *passwd)
+{
+ void *lib = dlopen("libsec_km.so", RTLD_LAZY);
+
+ if(!lib)
+ return -100;
+
+ int r = -101;
+ decrypt_EDK_t sym = (decrypt_EDK_t)dlsym(lib, "decrypt_EDK");
+ if(sym)
+ r = sym(dek, edk, passwd);
+
+ dlclose(lib);
+
+ return r;
+}
+
+int mount_ecryptfs_drive(
+ const char *passwd, const char *source, const char *target, int filter)
+{
+ void *lib = dlopen("libsec_ecryptfs.so", RTLD_LAZY);
+ if(!lib)
+ return -100;
+
+ int r = -101;
+ mount_ecryptfs_drive_t sym = (mount_ecryptfs_drive_t)dlsym(lib, "mount_ecryptfs_drive");
+ if(sym)
+ r = sym(passwd, source, target, filter);
+
+ dlclose(lib);
+
+ return r;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 15:52:56 +0100