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Strip leading +/- from github target diffs (#3244)

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The GitHub source generates chunks for targeted scans differently than it does for "normal" scans. One difference was the presence of leading + and - characters, which can interfere with detection in some cases.
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Cody Rose 2024-08-23 15:21:58 -04:00 committed by GitHub
parent 8f299ff8cd
commit 3b0b2909ca
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1 changed files with 8 additions and 1 deletions
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9
pkg/sources/github/github.go
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@ -1408,7 +1408,7 @@ func (s *Source) scanTarget(ctx context.Context, target sources.ChunkingTarget,
SourceID: s.SourceID(),
JobID: s.JobID(),
SecretID: target.SecretID,
Data: []byte(res),
Data: []byte(stripLeadingPlusMinus(res)),
SourceMetadata: &source_metadatapb.MetaData{
Data: &source_metadatapb.MetaData_Github{Github: meta},
},
@ -1417,3 +1417,10 @@ func (s *Source) scanTarget(ctx context.Context, target sources.ChunkingTarget,
return common.CancellableWrite(ctx, chunksChan, chunk)
}
// stripLeadingPlusMinus removes leading + and - characters from lines in a diff string. These characters exist in the
// diffs returned when performing a targeted scan and need to be removed so that detectors are operating on the correct
// text.
func stripLeadingPlusMinus(diff string) string {
return strings.ReplaceAll(strings.ReplaceAll(diff, "\n+", "\n"), "\n-", "\n")
}