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Fix hashing on write of 0-length files

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This commit is contained in:
Jordan Brown
2022-10-02 14:08:37 -04:00
parent 21f72e67a4
commit 639075af1e
1 changed files with 12 additions and 1 deletions
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src/Tgstation.Server.Host/IO/SynchronousIOManager.cs
+12 -1
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@@ -97,7 +97,18 @@ namespace Tgstation.Server.Host.IO
// suppressed due to only using for consistency checks
using (var sha1 = SHA1.Create())
{
string GetSha1(Stream dataToHash) => dataToHash != null && dataToHash.Length != 0 ? String.Join(String.Empty, sha1.ComputeHash(dataToHash).Select(b => b.ToString("x2", CultureInfo.InvariantCulture))) : null;
string GetSha1(Stream dataToHash)
{
if (dataToHash == null)
return null;
byte[] sha1Computed = dataToHash.Length != 0
? sha1.ComputeHash(dataToHash)
: sha1.ComputeHash(Array.Empty<byte>());
return String.Join(String.Empty, sha1Computed.Select(b => b.ToString("x2", CultureInfo.InvariantCulture)));
}
var originalSha1 = GetSha1(file);
if (originalSha1 != sha1InOut)
{