|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace LeKoala\Encrypt; |
|
4
|
|
|
|
|
5
|
|
|
use Exception; |
|
6
|
|
|
use SilverStripe\Assets\File; |
|
7
|
|
|
use SilverStripe\Control\Director; |
|
8
|
|
|
use SilverStripe\ORM\DataExtension; |
|
9
|
|
|
use SilverStripe\Core\Config\Config; |
|
10
|
|
|
use SilverStripe\Versioned\Versioned; |
|
11
|
|
|
use ParagonIE\CipherSweet\CipherSweet; |
|
12
|
|
|
use ParagonIE\CipherSweet\EncryptedFile; |
|
|
|
|
|
|
13
|
|
|
use SilverStripe\Assets\Flysystem\FlysystemAssetStore; |
|
14
|
|
|
|
|
15
|
|
|
/** |
|
16
|
|
|
* Safe and encrypted content file |
|
17
|
|
|
* Also make sure that files are not public assets! => use htaccess |
|
18
|
|
|
* @property bool $Encrypted |
|
19
|
|
|
* @property File&EncryptedDBFile $owner |
|
20
|
|
|
*/ |
|
21
|
|
|
class EncryptedDBFile extends DataExtension |
|
22
|
|
|
{ |
|
23
|
|
|
/** |
|
24
|
|
|
* @var EncryptedFile |
|
25
|
|
|
*/ |
|
26
|
|
|
protected static $encryptionEngine; |
|
27
|
|
|
|
|
28
|
|
|
/** |
|
29
|
|
|
* @var array<string,string> |
|
30
|
|
|
*/ |
|
31
|
|
|
private static $db = [ |
|
|
|
|
|
|
32
|
|
|
"Encrypted" => "Boolean", |
|
33
|
|
|
]; |
|
34
|
|
|
|
|
35
|
|
|
/** |
|
36
|
|
|
* @return string|bool |
|
37
|
|
|
*/ |
|
38
|
|
|
public function getDecryptionLink() |
|
39
|
|
|
{ |
|
40
|
|
|
$data = [ |
|
41
|
|
|
"ID" => $this->owner->ID, |
|
42
|
|
|
"Hash" => substr($this->owner->File->Hash, 0, 10), |
|
43
|
|
|
]; |
|
44
|
|
|
$url = "__decrypt/?" . http_build_query($data); |
|
45
|
|
|
return Director::absoluteURL($url); |
|
46
|
|
|
} |
|
47
|
|
|
|
|
48
|
|
|
/** |
|
49
|
|
|
* Check if the actual file on the filesystem is encrypted |
|
50
|
|
|
* You might also use the Encrypted field that should be accurate |
|
51
|
|
|
* |
|
52
|
|
|
* @return boolean |
|
53
|
|
|
*/ |
|
54
|
|
|
public function isEncrypted() |
|
55
|
|
|
{ |
|
56
|
|
|
$stream = $this->owner->getStream(); |
|
57
|
|
|
if (!$stream) { |
|
|
|
|
|
|
58
|
|
|
return false; |
|
59
|
|
|
} |
|
60
|
|
|
$encFile = EncryptHelper::getEncryptedFileInstance(); |
|
61
|
|
|
return $encFile->isStreamEncrypted($stream); |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
|
|
/** |
|
65
|
|
|
* @param boolean $forceStatus |
|
66
|
|
|
* @param boolean $write |
|
67
|
|
|
* @return boolean |
|
68
|
|
|
*/ |
|
69
|
|
|
public function updateEncryptionStatus($forceStatus = null, $write = true) |
|
70
|
|
|
{ |
|
71
|
|
|
if ($forceStatus !== null) { |
|
72
|
|
|
$this->owner->Encrypted = (bool)$forceStatus; |
|
73
|
|
|
} else { |
|
74
|
|
|
if ($this->isEncrypted()) { |
|
75
|
|
|
$this->owner->Encrypted = true; |
|
76
|
|
|
} else { |
|
77
|
|
|
$this->owner->Encrypted = false; |
|
78
|
|
|
} |
|
79
|
|
|
} |
|
80
|
|
|
if ($write) { |
|
81
|
|
|
if (class_exists(Versioned::class) && $this->owner->hasExtension(Versioned::class)) { |
|
82
|
|
|
$this->owner->writeWithoutVersion(); |
|
83
|
|
|
} else { |
|
84
|
|
|
$this->owner->write(); |
|
85
|
|
|
} |
|
86
|
|
|
} |
|
87
|
|
|
return $this->owner->Encrypted; |
|
88
|
|
|
} |
|
89
|
|
|
|
|
90
|
|
|
/** |
|
91
|
|
|
* Output file using regular php |
|
92
|
|
|
* Does not send headers, see EncryptHelper::sendDecryptedFile |
|
93
|
|
|
* |
|
94
|
|
|
* @throws Exception |
|
95
|
|
|
* @return void |
|
96
|
|
|
*/ |
|
97
|
|
|
public function sendDecryptedFile() |
|
98
|
|
|
{ |
|
99
|
|
|
if (ob_get_level()) { |
|
100
|
|
|
ob_end_clean(); |
|
101
|
|
|
} |
|
102
|
|
|
$stream = $this->owner->getStream(); |
|
103
|
|
|
if (!$stream) { |
|
|
|
|
|
|
104
|
|
|
throw new Exception("File not found"); |
|
105
|
|
|
} |
|
106
|
|
|
if ($this->owner->Encrypted) { |
|
107
|
|
|
$encFile = EncryptHelper::getEncryptedFileInstance(); |
|
108
|
|
|
$output = fopen('php://temp', 'w+b'); |
|
109
|
|
|
if (!$output) { |
|
110
|
|
|
throw new Exception("Failed to open output stream"); |
|
111
|
|
|
} |
|
112
|
|
|
|
|
113
|
|
|
// We need to decrypt stream |
|
114
|
|
|
if ($encFile->isStreamEncrypted($stream)) { |
|
115
|
|
|
$success = $encFile->decryptStream($stream, $output); |
|
116
|
|
|
if (!$success) { |
|
117
|
|
|
throw new Exception("Failed to decrypt stream"); |
|
118
|
|
|
} |
|
119
|
|
|
|
|
120
|
|
|
// Rewind first |
|
121
|
|
|
rewind($output); |
|
122
|
|
|
fpassthru($output); |
|
123
|
|
|
} else { |
|
124
|
|
|
fpassthru($stream); |
|
125
|
|
|
} |
|
126
|
|
|
} else { |
|
127
|
|
|
fpassthru($stream); |
|
128
|
|
|
} |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
|
|
/** |
|
132
|
|
|
* Files are not encrypted automatically |
|
133
|
|
|
* Call this method to encrypt them |
|
134
|
|
|
* |
|
135
|
|
|
* @throws Exception |
|
136
|
|
|
* @param bool $write |
|
137
|
|
|
* @return bool |
|
138
|
|
|
*/ |
|
139
|
|
|
public function encryptFileIfNeeded($write = true) |
|
140
|
|
|
{ |
|
141
|
|
|
// Already mark as encrypted |
|
142
|
|
|
if ($this->owner->Encrypted) { |
|
143
|
|
|
return true; |
|
144
|
|
|
} |
|
145
|
|
|
if (!$this->owner->exists()) { |
|
146
|
|
|
throw new Exception("File does not exist"); |
|
147
|
|
|
} |
|
148
|
|
|
$stream = $this->owner->getStream(); |
|
149
|
|
|
if (!$stream) { |
|
|
|
|
|
|
150
|
|
|
throw new Exception("Failed to get stream"); |
|
151
|
|
|
} |
|
152
|
|
|
|
|
153
|
|
|
$encFile = EncryptHelper::getEncryptedFileInstance(); |
|
154
|
|
|
$isEncrypted = $encFile->isStreamEncrypted($stream); |
|
155
|
|
|
|
|
156
|
|
|
// It's not yet encrypted |
|
157
|
|
|
if (!$isEncrypted) { |
|
158
|
|
|
// php://temp is not a file path, it's a pseudo protocol that always creates a new random temp file when used. |
|
159
|
|
|
$output = fopen('php://temp', 'wb'); |
|
160
|
|
|
if (!$output) { |
|
161
|
|
|
throw new Exception("Failed to decrypt stream"); |
|
162
|
|
|
} |
|
163
|
|
|
$success = $encFile->encryptStream($stream, $output); |
|
164
|
|
|
if (!$success) { |
|
165
|
|
|
throw new Exception("Failed to encrypt stream"); |
|
166
|
|
|
} |
|
167
|
|
|
// dont forget to rewind the stream ! |
|
168
|
|
|
rewind($output); |
|
169
|
|
|
|
|
170
|
|
|
// This is really ugly, see https://github.com/silverstripe/silverstripe-assets/issues/467 |
|
171
|
|
|
$configFlag = FlysystemAssetStore::config()->keep_empty_dirs; |
|
172
|
|
|
Config::modify()->set(FlysystemAssetStore::class, 'keep_empty_dirs', true); |
|
173
|
|
|
$fileResult = $this->owner->setFromStream($output, $this->owner->getFilename()); |
|
174
|
|
|
// Mark as encrypted in db |
|
175
|
|
|
$this->updateEncryptionStatus(true, $write); |
|
176
|
|
|
Config::modify()->set(FlysystemAssetStore::class, 'keep_empty_dirs', $configFlag); |
|
177
|
|
|
|
|
178
|
|
|
return true; |
|
179
|
|
|
} |
|
180
|
|
|
|
|
181
|
|
|
if ($this->owner->Encrypted != $isEncrypted) { |
|
182
|
|
|
$this->updateEncryptionStatus($isEncrypted, $write); |
|
183
|
|
|
} |
|
184
|
|
|
|
|
185
|
|
|
return $isEncrypted; |
|
186
|
|
|
} |
|
187
|
|
|
} |
|
188
|
|
|
|
lekoala /
silverstripe-encrypt
Loading history...
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: