|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* neuralyzer : Data Anonymization Library and CLI Tool |
|
4
|
|
|
* |
|
5
|
|
|
* PHP Version 7.0 |
|
6
|
|
|
* |
|
7
|
|
|
* @author Emmanuel Dyan |
|
8
|
|
|
* @author Rémi Sauvat |
|
9
|
|
|
* @copyright 2017 Emmanuel Dyan |
|
10
|
|
|
* |
|
11
|
|
|
* @package edyan/neuralyzer |
|
12
|
|
|
* |
|
13
|
|
|
* @license GNU General Public License v2.0 |
|
14
|
|
|
* |
|
15
|
|
|
* @link https://github.com/edyan/neuralyzer |
|
16
|
|
|
*/ |
|
17
|
|
|
|
|
18
|
|
|
namespace Inet\Neuralyzer\Anonymizer; |
|
19
|
|
|
|
|
20
|
|
|
use Inet\Neuralyzer\Exception\NeuralizerException; |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* DB Anonymizer |
|
24
|
|
|
*/ |
|
25
|
|
|
class DB extends AbstractAnonymizer |
|
26
|
|
|
{ |
|
27
|
|
|
/** |
|
28
|
|
|
* The PDO connection |
|
29
|
|
|
* |
|
30
|
|
|
* @var \PDO |
|
31
|
|
|
*/ |
|
32
|
|
|
private $pdo; |
|
33
|
|
|
|
|
34
|
|
|
/** |
|
35
|
|
|
* Prepared statement is stored for the update, to make the queries faster |
|
36
|
|
|
* |
|
37
|
|
|
* @var \PDOStatement |
|
38
|
|
|
*/ |
|
39
|
|
|
private $preparedStmt; |
|
40
|
|
|
|
|
41
|
|
|
/** |
|
42
|
|
|
* Constructor |
|
43
|
|
|
* |
|
44
|
|
|
* @param \PDO $pdo |
|
45
|
|
|
*/ |
|
46
|
2 |
|
public function __construct(\PDO $pdo) |
|
47
|
|
|
{ |
|
48
|
2 |
|
$this->pdo = $pdo; |
|
49
|
2 |
|
$this->pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION); |
|
50
|
2 |
|
} |
|
51
|
|
|
|
|
52
|
|
|
/** |
|
53
|
|
|
* Process an entity by reading / writing to the DB |
|
54
|
|
|
* |
|
55
|
|
|
* @param string $table |
|
56
|
|
|
* @param callable|null $callback |
|
57
|
|
|
* @param bool $pretend |
|
58
|
|
|
* @param bool $returnResult |
|
59
|
|
|
* |
|
60
|
|
|
* @return void|array |
|
61
|
|
|
*/ |
|
62
|
1 |
|
public function processEntity( |
|
63
|
|
|
string $table, |
|
64
|
|
|
callable $callback = null, |
|
65
|
|
|
bool $pretend = true, |
|
66
|
|
|
bool $returnResult = false |
|
67
|
|
|
) { |
|
68
|
1 |
|
$queries = []; |
|
69
|
1 |
|
$actionsOnThatEntity = $this->whatToDoWithEntity($table); |
|
70
|
|
|
|
|
71
|
1 |
|
if ($actionsOnThatEntity & self::TRUNCATE_TABLE) { |
|
72
|
|
|
$where = $this->getWhereConditionInConfig($table); |
|
73
|
|
|
$query = $this->runDelete($table, $where, $pretend); |
|
74
|
|
|
($returnResult === true ? array_push($queries, $query) : ''); |
|
75
|
|
|
} |
|
76
|
|
|
|
|
77
|
1 |
|
if ($actionsOnThatEntity & self::UPDATE_TABLE) { |
|
78
|
|
|
// I need to read line by line if I have to update the table |
|
79
|
|
|
// to make sure I do update by update (slower but no other choice for now) |
|
80
|
1 |
|
$i = 0; |
|
81
|
1 |
|
$this->preparedStmt = null; |
|
82
|
|
|
|
|
83
|
1 |
|
$key = $this->getPrimaryKey($table); |
|
84
|
1 |
|
$res = $this->pdo->query("SELECT $key FROM $table"); |
|
85
|
1 |
|
$res->setFetchMode(\PDO::FETCH_ASSOC); |
|
86
|
|
|
|
|
87
|
1 |
|
$this->pdo->beginTransaction(); |
|
88
|
|
|
|
|
89
|
1 |
|
while ($row = $res->fetch()) { |
|
90
|
1 |
|
$val = $row[$key]; |
|
91
|
1 |
|
$data = $this->generateFakeData($table); |
|
92
|
|
|
|
|
93
|
1 |
|
if ($pretend === false) { |
|
94
|
1 |
|
$this->runUpdate($table, $data, $key, $val); |
|
95
|
|
|
} |
|
96
|
1 |
|
($returnResult === true ? array_push($queries, $this->buildUpdateSQL($table, $data, "$key = '$val'")) : ''); |
|
97
|
|
|
|
|
98
|
1 |
|
if (!is_null($callback)) { |
|
99
|
1 |
|
$callback(++$i); |
|
100
|
|
|
} |
|
101
|
|
|
} |
|
102
|
|
|
|
|
103
|
|
|
// Commit, even if I am in pretend (that will do ... nothing) |
|
104
|
1 |
|
$this->pdo->commit(); |
|
105
|
|
|
} |
|
106
|
|
|
|
|
107
|
1 |
|
return $queries; |
|
108
|
|
|
} |
|
109
|
|
|
|
|
110
|
|
|
/** |
|
111
|
|
|
* Identify the primary key for a table |
|
112
|
|
|
* |
|
113
|
|
|
* @param string $table |
|
114
|
|
|
* |
|
115
|
|
|
* @return string Field's name |
|
116
|
|
|
*/ |
|
117
|
1 |
|
protected function getPrimaryKey(string $table) |
|
118
|
|
|
{ |
|
119
|
|
|
try { |
|
120
|
1 |
|
$res = $this->pdo->query("SHOW COLUMNS FROM $table WHERE `Key` = 'Pri'"); |
|
121
|
|
|
} catch (\Exception $e) { |
|
122
|
|
|
throw new NeuralizerException('Query Error : ' . $e->getMessage()); |
|
123
|
|
|
} |
|
124
|
|
|
|
|
125
|
1 |
|
$primary = $res->fetchAll(\PDO::FETCH_COLUMN); |
|
126
|
|
|
// Didn't find a primary key ! |
|
127
|
1 |
|
if (empty($primary)) { |
|
128
|
|
|
throw new NeuralizerException("Can't find a primary key for '$table'"); |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
1 |
|
return $primary[0]; |
|
132
|
|
|
} |
|
133
|
|
|
|
|
134
|
|
|
/** |
|
135
|
|
|
* Execute the Update with PDO |
|
136
|
|
|
* |
|
137
|
|
|
* @param string $table Name of the table |
|
138
|
|
|
* @param array $data Array of fields => value to update the table |
|
139
|
|
|
* @param string $primaryKey |
|
140
|
|
|
* @param string $val Primary Key's Value |
|
141
|
|
|
*/ |
|
142
|
1 |
|
private function runUpdate(string $table, array $data, string $primaryKey, $val) |
|
143
|
|
|
{ |
|
144
|
1 |
|
if (is_null($this->preparedStmt)) { |
|
145
|
1 |
|
$this->prepareStmt($table, $primaryKey, array_keys($data)); |
|
146
|
|
|
} |
|
147
|
|
|
|
|
148
|
1 |
|
$values = [":$primaryKey" => $val]; |
|
149
|
1 |
|
foreach ($data as $field => $value) { |
|
150
|
1 |
|
$values[":$field"] = $value; |
|
151
|
|
|
} |
|
152
|
|
|
|
|
153
|
|
|
try { |
|
154
|
1 |
|
$this->preparedStmt->execute($values); |
|
155
|
|
|
} catch (\PDOException $e) { |
|
156
|
|
|
$this->pdo->rollback(); |
|
157
|
|
|
throw new NeuralizerException("Problem anonymizing $table (" . $e->getMessage() . ')'); |
|
158
|
|
|
} |
|
159
|
1 |
|
} |
|
160
|
|
|
|
|
161
|
|
|
/** |
|
162
|
|
|
* Prepare the statement if asked |
|
163
|
|
|
* |
|
164
|
|
|
* @param string $table |
|
165
|
|
|
* @param string $primaryKey |
|
166
|
|
|
* @param array $fieldNames |
|
167
|
|
|
* |
|
168
|
|
|
* @return \PDOStatement |
|
169
|
|
|
*/ |
|
170
|
1 |
|
private function prepareStmt(string $table, string $primaryKey, array $fieldNames) |
|
171
|
|
|
{ |
|
172
|
1 |
|
$fields = []; |
|
173
|
1 |
|
foreach ($fieldNames as $field) { |
|
174
|
1 |
|
$fields[] = "$field = IF($field IS NOT NULL, :$field, NULL)"; |
|
175
|
|
|
} |
|
176
|
1 |
|
$sql = "UPDATE $table SET " . implode(', ', $fields) . " WHERE $primaryKey = :$primaryKey"; |
|
177
|
1 |
|
$this->preparedStmt = $this->pdo->prepare($sql); |
|
178
|
1 |
|
} |
|
179
|
|
|
|
|
180
|
|
|
/** |
|
181
|
|
|
* Execute the Delete with PDO |
|
182
|
|
|
* |
|
183
|
|
|
* @param string $table |
|
184
|
|
|
* @param string $where |
|
185
|
|
|
* @param bool $pretend |
|
186
|
|
|
* |
|
187
|
|
|
* @return string |
|
188
|
|
|
*/ |
|
189
|
|
|
private function runDelete(string $table, string $where, bool $pretend): string |
|
190
|
|
|
{ |
|
191
|
|
|
$where = empty($where) ? '' : " WHERE $where"; |
|
192
|
|
|
$sql = "DELETE FROM {$table}{$where}"; |
|
193
|
|
|
|
|
194
|
|
|
if ($pretend === true) { |
|
195
|
|
|
return $sql; |
|
196
|
|
|
} |
|
197
|
|
|
|
|
198
|
|
|
try { |
|
199
|
|
|
$this->pdo->query($sql); |
|
200
|
|
|
} catch (\Exception $e) { |
|
201
|
|
|
throw new NeuralizerException('Query DELETE Error (' . $e->getMessage() . ')'); |
|
202
|
|
|
} |
|
203
|
|
|
|
|
204
|
|
|
return $sql; |
|
205
|
|
|
} |
|
206
|
|
|
|
|
207
|
|
|
/** |
|
208
|
|
|
* Build the SQL just for debug |
|
209
|
|
|
* |
|
210
|
|
|
* @param string $table |
|
211
|
|
|
* @param array $data |
|
212
|
|
|
* @param string $where |
|
213
|
|
|
* |
|
214
|
|
|
* @return string |
|
215
|
|
|
*/ |
|
216
|
|
|
private function buildUpdateSQL(string $table, array $data, string $where): string |
|
217
|
|
|
{ |
|
218
|
|
|
$fieldsVals = []; |
|
219
|
|
|
foreach ($data as $field => $value) { |
|
220
|
|
|
$fieldsVals[] = "$field = IF($field IS NOT NULL, '" . $this->pdo->quote($value) . "', NULL)"; |
|
221
|
|
|
} |
|
222
|
|
|
|
|
223
|
|
|
$sql = "UPDATE $table SET " . implode(', ', $fieldsVals) . " WHERE $where"; |
|
224
|
|
|
|
|
225
|
|
|
return $sql; |
|
226
|
|
|
} |
|
227
|
|
|
} |
|
228
|
|
|
|
edyan /
neuralyzer
