Customize tiger hash

richardDobron · Nov 3, 2023 · 6b183df · 6b183df
1 parent 9dcc43d
commit 6b183df
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Showing 3 changed files with 50 additions and 13 deletions.
diff --git a/src/fbt/Transform/FbtHash.php b/src/fbt/Transform/FbtHash.php
@@ -65,19 +65,7 @@ public static function tiger($phrases): array
         return array_map(function ($phrase) {
             return array_map(
                 function ($text) use ($phrase) {
-                    return hash('tiger128,3', $text . ':::' . $phrase['desc'] . ':');
-                },
-                $phrase['texts']
-            );
-        }, $phrases);
-    }
-
-    public static function tiger_fb($phrases): array
-    {
-        return array_map(function ($phrase) {
-            return array_map(
-                function ($text) use ($phrase) {
-                    return hash('tiger128,3-fb', $text . ':::' . $phrase['desc'] . ':');
+                    return FbtTransform\fbtHash::oldTigerHash($text . ':::' . $phrase['desc'] . ':');
                 },
                 $phrase['texts']
             );

diff --git a/src/fbt/Transform/FbtTransform/fbtHash.php b/src/fbt/Transform/FbtTransform/fbtHash.php
@@ -76,4 +76,19 @@ public static function jenkinsHash(string $str): int
 
         return $hash;
     }
+
+    public static function oldTigerHash(string $input, int $digestBitLen = 128)
+    {
+        return substr(
+            implode(
+                array_map(
+                    function (string $h) {
+                        return str_pad(bin2hex(strrev($h)), 16, "0");
+                    },
+                    str_split(hash("tiger192,3", $input, true), 8)
+                )
+            ),
+            0, 48 - (192 - $digestBitLen) / 4
+        );
+    }
 }
diff --git a/tests/hashes/tigerHashTest.php b/tests/hashes/tigerHashTest.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace tests\hashes;
+
+use fbt\Transform\FbtTransform\fbtHash;
+
+class tigerHashTest extends \tests\TestCase
+{
+    public function dataProvider(): array
+    {
+        return [
+            ['', '24f0130c63ac933216166e76b1bb925f'],
+            ['abc', 'f258c1e88414ab2a527ab541ffc5b8bf'],
+            ['Tiger', '9f00f599072300dd276abb38c8eb6dec'],
+            ['ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-', '87fb2a9083851cf7470d2cf810e6df9e'],
+            ['ABCDEFGHIJKLMNOPQRSTUVWXYZ=abcdefghijklmnopqrstuvwxyz+0123456789', '467db80863ebce488df1cd1261655de9'],
+            ['Tiger - A Fast New Hash Function, by Ross Anderson and Eli Biham', '0c410a042968868a1671da5a3fd29a72'],
+            ['Tiger - A Fast New Hash Function, by Ross Anderson and Eli Biham, proceedings of Fast Software Encryption 3, Cambridge.', 'ebf591d5afa655ce7f22894ff87f54ac'],
+            ['Tiger - A Fast New Hash Function, by Ross Anderson and Eli Biham, proceedings of Fast Software Encryption 3, Cambridge, 1996.', '3d9aeb03d1bd1a6357b2774dfd6d5b24'],
+            ['ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-', '00b83eb4e53440c576ac6aaee0a74858'],
+            ["\u{1F4AF}k\u{00E5}\u{0019}-\u{00D4}\u{00B5}\u{00A6}\u{00A8}\u{00B7}G:\u{00ED}p\u{00D0}\u{FFFD}\u{001F}NT\u{0012}H\u{00E3}\u{FFFD}\u{001A}\u{00D2}", 'ed31a59cd617d2a2b0402d5af48ea74a'],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProvider
+     */
+    public function testTigerHash($input, $expected)
+    {
+        $this->assertEquals($expected, fbtHash::oldTigerHash($input));
+    }
+}