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修正 PNG 的驗證 #2

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Merged
merged 2 commits into from
Jul 2, 2025
Merged

修正 PNG 的驗證 #2

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93058ee
update reference of GCK File Signature Table
ballway Jul 2, 2025
b568573
修正 .PNG 的 File Signautre
ballway Jul 2, 2025
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9 changes: 3 additions & 6 deletions FileExtensionValidation/FileExtensionValidator.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,8 @@ public static class FileExtensionValidator
{
//https://en.wikipedia.org/wiki/List_of_file_signatures
//https://www.filesignatures.net/index.php
//https://www.garykessler.net/library/file_sigs.html
//https://www.garykessler.net/library/file_sigs.html (作者已退休，於 2025 轉交 SEARCH 團隊維護 https://filesig.search.org/)
//https://www.garykessler.net/library/file_sigs_GCK_latest.html
//https://asecuritysite.com/forensics/magic
private static Dictionary<string, List<(byte[] Signature, int Offset, int Skip, byte[] SecondSignature)>> fileSignature
= new Dictionary<string, List<(byte[] Signature, int Offset, int Skip, byte[] SecondSignature)>>() {
Expand All @@ -30,11 +31,7 @@ public static class FileExtensionValidator
(new byte[] { 0x57, 0x69, 0x6E, 0x5A, 0x69, 0x70 }, 0, 0, new byte[] { })
}
},
{ ".PNG", new List<(byte[], int, int, byte[])> { (new byte[] { 0x89, 0x50, 0x4E, 0x47 }, 0, 0, new byte[] { }),
(new byte[] { 0xFF, 0xD8, 0xFF, 0xE0 }, 0, 0, new byte[] { }),
(new byte[] { 0xFF, 0xD8, 0xFF, 0xE1 }, 0, 0, new byte[] { }),
(new byte[] { 0xFF, 0xD8, 0xFF, 0xE8 }, 0, 0, new byte[] { })
} },
{ ".PNG", new List<(byte[], int, int, byte[])> { (new byte[] { 0x89, 0x50, 0x4E, 0x47 }, 0, 0, new byte[] { })} },
{ ".JPG", new List<(byte[], int, int, byte[])>
{
(new byte[] { 0xFF, 0xD8, 0xFF, 0xE0 }, 0, 0, new byte[] { }),
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