进入recovery log :
01-01 08:02:46.165 362 362 D TrustyGateKeeper: TrustyGateKeeper Verify =========<<<<<<<<<<<<
01-01 08:02:46.165 455 455 D keystore: AddAuthenticationToken: timestamp = 51230, time_received = 47
01-01 08:02:46.168 455 455 E keystore: unlock called on uninitialized keystore.
01-01 08:02:46.168 744 998 I LockSettingsService: Unlocking user 0 with secret only, length 64
01-01 08:02:46.170 320 324 D vold : e4crypt_unlock_user_key 0 serial=0 token_present=0
01-01 08:02:46.171 320 324 D vold : Skipping non-key .
01-01 08:02:46.171 320 324 D vold : Skipping non-key ..
01-01 08:02:46.172 320 324 D vold : Trying user CE key /data/misc/vold/user_keys/ce/0/current
01-01 08:02:46.176 320 324 W vold : Password present but stretching is nopassword
01-01 08:02:46.178 320 324 E vold : Openssl error: 0
01-01 08:02:46.178 320 324 E vold : Failed to find working ce key for user 0
01-01 08:02:46.178 320 324 E vold : Couldn't read key for 0
01-01 08:02:46.178 320 324 E vold : Rebooting into recovery
[ 47.758234] c2 1 init: Received sys.powerctl='reboot,recovery' from pid: 320 (/system/bin/vold)
01-01 08:02:46.181 320 324 W libc : [SPRD_DBG]__system_property_set(sys.powerctl,reboot,recovery),pid = 320,proc = /system/bin/vold
[ 47.761176] c2 1 init: Clear action queue and start shutdown trigger
01-01 08:02:46.186 744 998 D ActivityManager: Started unlocking user 0
01-01 08:02:46.186 744 998 D LockSettingsService: unlockUser[ 47.763189] c2 1 init: processing action (shutdown_done) from (<Builtin Action>:0)
1、
06-13 11:03:14.180 268 2086 D vold : e4crypt_add_user_key_auth 0 serial=0 token_present=0
06-13 11:03:14.187 268 2086 D vold : Skipping non-key .
06-13 11:03:14.187 268 2086 D vold : Skipping non-key ..
06-13 11:03:14.187 268 2086 E vold : key_path = /data/misc/vold/user_keys/ce/0/cx0000000000
06-13 11:03:14.187 268 2086 E vold : tmp_path = /data/misc/vold/user_keys/temp
06-13 11:03:14.188 268 2086 E vold : writeStringToFileA /data/misc/vold/user_keys/temp/version: No such file or directory
06-13 11:03:14.189 268 2086 E vold :
修改密码时,将密码文件写入临时目录 /data/misc/vold/user_keys/temp/ ,相关文件encrypted_key secdiscardable stretching keymaster_key_blobversion version ,并创建密码文件 /data/misc/vold/user_keys/ce/0/cx0000000000
并将/data/misc/vold/user_keys/temp 重命名为 /data/misc/vold/user_keys/ce/0/cx0000000000
storeKeyAtomically 重命名
2、
06-13 11:03:14.312 268 2086 V vold : /system/bin/secdiscard
06-13 11:03:14.312 268 2086 V vold : --
06-13 11:03:14.312 268 2086 V vold : /data/misc/vold/user_keys/ce/0/current/encrypted_key
06-13 11:03:14.312 268 2086 V vold : /data/misc/vold/user_keys/ce/0/current/secdiscardable
06-13 11:03:14.312 268 2086 V vold : /data/misc/vold/user_keys/ce/0/current/keymaster_key_blob
06-13 11:03:14.379 268 2086 V vold : /system/bin/rm
06-13 11:03:14.379 268 2086 V vold : -rf
06-13 11:03:14.379 268 2086 V vold : /data/misc/vold/user_keys/ce/0/current
06-13 11:03:15.056 268 2086 D vold : Renaming /data/misc/vold/user_keys/ce/0/cx0000000000 to /data/misc/vold/user_keys/ce/0/current
删除之前的密码文件信息目录 /data/misc/vold/user_keys/ce/0/current
将新的密码文件 /data/misc/vold/user_keys/ce/0/cx0000000000 重命名为 /data/misc/vold/user_keys/ce/0/current
fixate_user_ce_key 重命名
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