知道小米版本號如何取得檔案下載網址的方式

twu2

原作來自 XDA: https://forum.xda-developers.com ... xiaomi-ota-t3691612
方法一不能用了, 不過方法二仍可以使用, 而且... 是目前的更新機制, 應該不容易改... 也許一直能用下去.

不知道為什麼, 原作者的 python 程式碼在我的機器上無法正常執行, 在 decrypt 那一個部份一直無法成功.
所以... 就用 php 改寫一下.

1. <?php
   
2. 
   
3. $cipher = 'rijndael-128';
   
4. $mode = 'cbc';
   
5. $miui_key = 'miuiotavalided11';
   
6. $miui_iv = '0102030405060708';
   
7. 
   
8. function miui_decrypt($s)
   
9. {
   
10.     global $cipher, $mode, $miui_key, $miui_iv;
    
11. 
    
12.     $td = mcrypt_module_open($cipher, '', $mode, '');
    
13.     mcrypt_generic_init($td, $miui_key, $miui_iv);
    
14.     $decrypted = mdecrypt_generic($td, base64_decode($s));
    
15.     mcrypt_generic_deinit($td);
    
16.     mcrypt_module_close($td);
    
17.     $pos = strrpos($decrypted, '}');
    
18.     if ($pos !== false)
    
19.         return substr($decrypted, 0, $pos + 1);
    
20.     return $decrypted;
    
21. }
    
22. 
    
23. function miui_encrypt($s)
    
24. {
    
25.     global $cipher, $mode, $miui_key, $miui_iv;
    
26. 
    
27.     $td = mcrypt_module_open($cipher, '', $mode, '');
    
28.     mcrypt_generic_init($td, $miui_key, $miui_iv);
    
29.     $bs = mcrypt_get_block_size($cipher, $mode);
    
30.     $n = $bs - (strlen($s) % $bs);
    
31.     while ($bs - (strlen($s) % $bs) != $bs)
    
32.         $s .= chr($n);
    
33.     $encrypted = base64_encode(mcrypt_generic($td, $s));
    
34.     mcrypt_generic_deinit($td);
    
35.     mcrypt_module_close($td);
    
36.     return $encrypted;
    
37. }
    
38. 
    
39. $checkurl = 'http://update.miui.com/updates/miotaV3.php';
    
40. 
    
41. $device_data = array(
    
42.     "a" => "0", # Don't know what this is.
    
43.     "c" => "7.0", # Same as 'c' above, it's the Android version.
    
44.     "b" => "F", # Same as above, 'X' for weekly build.
    
45.     "d" => "mido_global", # The device name, same as above, chiron for Chinese, chiron_global for global.
    
46.     "g" => "00000000000000000000000000000000", # This seems to be the android_id of the device. Maybe encoded somehow.
    
47.     "cts" => "0", # I don't know what this is.
    
48.     "i" => "0000000000000000000000000000000000000000000000000000000000000000", # This seems to be the imei of the device, obviously encoded somehow.
    
49.     "isR" => "0", # I don't know what this is.
    
50.     "f" => "1", # I don't know what this is.
    
51.     "l" => "en_US", # The locale.
    
52.     "n" => "",  # I don't know what this parameter is
    
53.     "sys" => "0", # I don't know what this is.
    
54.     "p" => "msm8953", # The chipset
    
55.     "unlock" => "1",  # 1 means bootloader is unlocked. 0 means locked.
    
56.     "r" => "CN", # I don't know what this is, maybe region of device?
    
57.     "sn" => "0x00000000", # Probably the serial number of the device, maybe encoded somehow.
    
58.     "v" => "MIUI-V9.0.5.0.NCFMIEI", # The version of MIUI installed.
    
59.     //"v" => "MIUI-V8.5.8.0.NCFMIED",
    
60.     "bv" => "9", # I don't know what this is.
    
61.     "id" => "", # I don't' know what this is.
    
62. );
    
63. 
    
64. $js = json_encode($device_data);
    
65. 
    
66. $postdata = "q=".urlencode(miui_encrypt($js))."&t=&s=1";
    
67. 
    
68. $curl = curl_init();
    
69. curl_setopt($curl, CURLOPT_URL, $checkurl);
    
70. curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    
71. curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    
72. curl_setopt($curl, CURLOPT_HEADER, 0);
    
73. curl_setopt($curl, CURLOPT_POST, 1);
    
74. curl_setopt($curl, CURLOPT_POSTFIELDS, $postdata);
    
75. $data = curl_exec($curl);
    
76. if ($data === false) {
    
77.     echo "*** curl_exec() failed: ".curl_errno($curl)." => ".curl_error($curl)."\n";
    
78.     curl_close($curl);
    
79.     exit;
    
80. }
    
81. 
    
82. $r = miui_decrypt($data);
    
83. $result = json_decode($r);
    
84. print_r($result);
    
85. 
    
86. exit;
    

複製代碼

上面那個是用紅米 Note4X 國際版為例子. 找 MIUI-V9.0.5.0.NCFMIEI 的升級版本.
如果要找其他的機型, 請改 c, d, v 這三個值, c 是 Android 版本, d 是機型代碼 (國際版加上 _global), v 是版本名稱.

會列出該版本之後的版本 (如果是最新的, 就會列出目前這個版本).
所以... 我們就可以取得 V9.0.5.0.NCFMIEI 這個版本的檔名: miui_HMNote4XGlobal_V9.0.5.0.NCFMIEI_d6176de291_7.0.zip

有檔名之後, 小米的路徑規則是 http://bigota.d.miui.com/版本/檔案
所以下載的網址就是 http://bigota.d.miui.com/V9.0.5. ... _d6176de291_7.0.zip