public static bool IsELF(this BinaryAnalyzerContext target)
{
ELFBinary ret = target.Binary as ELFBinary;
if (ret == null)
{
return(false);
}
return(true);
}
public static ELFBinary ELFBinary(this BinaryAnalyzerContext target)
{
ELFBinary ret = target.Binary as ELFBinary;
if (ret == null)
{
// Attempted to cast a binary target to a '{0}', but was unable to. This indicates a programmer error in rules evaluating that sort of target.
throw new InvalidOperationException(string.Format(SdkResources.IllegalBinaryCast, "ELFBinary"));
}
return(ret);
}
public override AnalysisApplicability CanAnalyzeElf(ELFBinary target, Sarif.PropertiesDictionary policy, out string reasonForNotAnalyzing)
{
IELF elf = target.ELF;
if (elf.Type == FileType.Core || elf.Type == FileType.None || elf.Type == FileType.Relocatable)
{
reasonForNotAnalyzing = reasonForNotAnalyzing = MetadataConditions.ElfIsCoreNoneOrObject;
return(AnalysisApplicability.NotApplicableToSpecifiedTarget);
}
reasonForNotAnalyzing = null;
return(AnalysisApplicability.ApplicableToSpecifiedTarget);
}
public sealed override AnalysisApplicability CanAnalyze(BinaryAnalyzerContext context, out string reasonForNotAnalyzing)
{
if (context.IsELF())
{
ELFBinary target = context.ELFBinary();
return(CanAnalyzeElf(target, context.Policy, out reasonForNotAnalyzing));
}
else
{
reasonForNotAnalyzing = MetadataConditions.ImageIsNotElf;
return(AnalysisApplicability.NotApplicableToSpecifiedTarget);
}
}
// We may want to consider changing this to an extension/plugin model rather than a hardcoded list of supported binary parsers.
// However, for now this will do.
public static IBinary GetBinaryFromFile(Uri uri, string symbolPath = null, string localSymbolDirectories = null)
{
if (PEBinary.CanLoadBinary(uri))
{
return(new PEBinary(uri, symbolPath, localSymbolDirectories));
}
else if (ELFBinary.CanLoadBinary(uri))
{
return(new ELFBinary(uri));
}
else
{
return(null);
}
}
// We may want to consider changing this to an extension/plugin model rather than a hardcoded list of supported binary parsers.
// However, for now this will do.
public static IBinary GetBinaryFromFile(Uri uri)
{
if (PEBinary.CanLoadBinary(uri))
{
return(new PEBinary(uri));
}
else if (ELFBinary.CanLoadBinary(uri))
{
return(new ELFBinary(uri));
}
else
{
return(null);
}
}
public override AnalysisApplicability CanAnalyzeElf(ELFBinary target, Sarif.PropertiesDictionary policy, out string reasonForNotAnalyzing)
{
IELF elf = target.ELF;
if (elf.Type == FileType.Core || elf.Type == FileType.None || elf.Type == FileType.Relocatable)
{
reasonForNotAnalyzing = MetadataConditions.ElfIsCoreNoneOrObject;
return(AnalysisApplicability.NotApplicableToSpecifiedTarget);
}
// We check for "any usage of non-gcc" as a default/standard compilation with clang leads to [GCC, Clang]
// either because it links with a gcc-compiled object (cstdlib) or the linker also reading as GCC.
// This has a potential for a False Negative if teams are using GCC and other tools.
if (target.Compilers.Any(c => c.Compiler != ELFCompilerType.GCC))
{
reasonForNotAnalyzing = MetadataConditions.ElfNotBuiltWithGcc;
return(AnalysisApplicability.NotApplicableToSpecifiedTarget);
}
reasonForNotAnalyzing = null;
return(AnalysisApplicability.ApplicableToSpecifiedTarget);
}
public abstract AnalysisApplicability CanAnalyzeElf(ELFBinary target, Sarif.PropertiesDictionary policy, out string reasonForNotAnalyzing);
