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hle: Improve safety (#2778)

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* timezone: Make timezone implementation safe

* hle: Do not use TrimEnd to parse ASCII strings

This adds an util that handle reading an ASCII string in a safe way.
Previously it was possible to read malformed data that could cause
various undefined behaviours in multiple services.

* hid: Remove an useless unsafe modifier on keyboard update

* Address gdkchan's comment

* Address gdkchan's comment
This commit is contained in:
Mary 2021-10-25 00:13:20 +02:00 • committed by GitHub
parent b4dc33efc2
commit 51fa1b2cb0
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9 changed files with 141 additions and 172 deletions
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13
Ryujinx.HLE/Utilities/StringUtils.cs
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@ -36,6 +36,15 @@ namespace Ryujinx.HLE.Utilities
return output;
}
public static string ReadInlinedAsciiString(BinaryReader reader, int maxSize)
{
byte[] data = reader.ReadBytes(maxSize);
int stringSize = Array.IndexOf<byte>(data, 0);
return Encoding.ASCII.GetString(data, 0, stringSize < 0 ? maxSize : stringSize);
}
public static byte[] HexToBytes(string hexString)
{
// Ignore last character if HexLength % 2 != 0.
@ -107,7 +116,7 @@ namespace Ryujinx.HLE.Utilities
}
}
public static unsafe int CompareCStr(char* s1, char* s2)
public static int CompareCStr(ReadOnlySpan<char> s1, ReadOnlySpan<char> s2)
{
int s1Index = 0;
int s2Index = 0;
@ -121,7 +130,7 @@ namespace Ryujinx.HLE.Utilities
return s2[s2Index] - s1[s1Index];
}
public static unsafe int LengthCstr(char* s)
public static int LengthCstr(ReadOnlySpan<char> s)
{
int i = 0;