Adopted Storage support
-Detects, decrypts, and mounts an adopted SD card if a
secondary block device is defined (usually mmcblk1)
-Handles unified storage
-Displays the adopted storage in MTP along with internal
-Factory Reset - wiped just like a data media device, we
retain the keys folder and the storage.xml during a
factory reset
-Backup / Restore
-Disable mass storage when adopted storage is present
-Read storage nickname from storage.xml and apply it to
display names in the GUI
-Read storage.xml and determine what storage location is in
use for /sdcard and remap accordingly
libgpt_twrp is source code mostly kanged from an efimanager
project. It is GPL v2 or higher, so we will opt for GPL v3.
Change-Id: Ieda0030bec5155ba8d2b9167dc0016cebbf39d55
diff --git a/crypto/lollipop/cryptfs.c b/crypto/lollipop/cryptfs.c
index 1e65a22..fa440ed 100644
--- a/crypto/lollipop/cryptfs.c
+++ b/crypto/lollipop/cryptfs.c
@@ -1060,6 +1060,7 @@
if (! ioctl(fd, DM_TABLE_LOAD, io)) {
break;
}
+ printf("%i\n", errno);
usleep(500000);
}
@@ -1145,7 +1146,7 @@
ioctl_init(io, DM_CRYPT_BUF_SIZE, name, 0);
if (ioctl(fd, DM_DEV_CREATE, io)) {
- printf("Cannot create dm-crypt device\n");
+ printf("Cannot create dm-crypt device %i\n", errno);
goto errout;
}
@@ -2017,3 +2018,45 @@
return crypt_ftr.crypt_type;
}
+
+/*
+ * Called by vold when it's asked to mount an encrypted external
+ * storage volume. The incoming partition has no crypto header/footer,
+ * as any metadata is been stored in a separate, small partition.
+ *
+ * out_crypto_blkdev must be MAXPATHLEN.
+ */
+int cryptfs_setup_ext_volume(const char* label, const char* real_blkdev,
+ const unsigned char* key, int keysize, char* out_crypto_blkdev) {
+ int fd = open(real_blkdev, O_RDONLY|O_CLOEXEC);
+ if (fd == -1) {
+ printf("Failed to open %s: %s", real_blkdev, strerror(errno));
+ return -1;
+ }
+
+ unsigned long nr_sec = 0;
+ nr_sec = get_blkdev_size(fd);
+ close(fd);
+
+ if (nr_sec == 0) {
+ printf("Failed to get size of %s: %s", real_blkdev, strerror(errno));
+ return -1;
+ }
+
+ struct crypt_mnt_ftr ext_crypt_ftr;
+ memset(&ext_crypt_ftr, 0, sizeof(ext_crypt_ftr));
+ ext_crypt_ftr.fs_size = nr_sec;
+ ext_crypt_ftr.keysize = keysize;
+ strcpy((char*) ext_crypt_ftr.crypto_type_name, "aes-cbc-essiv:sha256");
+
+ return create_crypto_blk_dev(&ext_crypt_ftr, key, real_blkdev,
+ out_crypto_blkdev, label);
+}
+
+/*
+ * Called by vold when it's asked to unmount an encrypted external
+ * storage volume.
+ */
+int cryptfs_revert_ext_volume(const char* label) {
+ return delete_crypto_blk_dev((char*) label);
+}