add location field to google drive

* Use chunkbytes that includes the size of peek.

* linter.

* continue.

* add TotalChunkSize const.

go.mod

@@ -8,6 +8,7 @@ require (
 	cloud.google.com/go/secretmanager v1.11.1
 	cloud.google.com/go/storage v1.31.0
 	github.com/Azure/go-autorest/autorest/azure/auth v0.5.11
+	github.com/BobuSumisu/aho-corasick v1.0.3
 	github.com/TheZeroSlave/zapsentry v1.17.0
 	github.com/aws/aws-sdk-go v1.44.83
 	github.com/bill-rich/disk-buffer-reader v0.1.7
@@ -44,7 +45,6 @@ require (
 	github.com/mholt/archiver/v4 v4.0.0-alpha.8
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/paulbellamy/ratecounter v0.2.0
-	github.com/petar-dambovaliev/aho-corasick v0.0.0-20211021192214-5ab2d9280aa9
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.16.0
 	github.com/rabbitmq/amqp091-go v1.8.1
@@ -94,7 +94,7 @@ require (
 	github.com/cloudflare/circl v1.3.3 // indirect
 	github.com/connesc/cipherio v0.2.1 // indirect
 	github.com/containerd/stargz-snapshotter/estargz v0.14.3 // indirect
-	github.com/couchbase/gocbcore/v10 v10.2.3 // indirect
+	github.com/couchbase/gocbcore/v10 v10.2.4 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dimchansky/utfbom v1.1.1 // indirect
 	github.com/docker/cli v23.0.5+incompatible // indirect

go.sum

@@ -51,6 +51,8 @@ github.com/Azure/go-autorest/tracing v0.6.0 h1:TYi4+3m5t6K48TGI9AUdb+IzbnSxvnvUM
 github.com/Azure/go-autorest/tracing v0.6.0/go.mod h1:+vhtPC754Xsa23ID7GlGsrdKBpUA79WCAKPPZVC2DeU=
 github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 h1:mFRzDkZVAjdal+s7s0MwaRv9igoPqLRdzOLzw/8Xvq8=
 github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
+github.com/BobuSumisu/aho-corasick v1.0.3 h1:uuf+JHwU9CHP2Vx+wAy6jcksJThhJS9ehR8a+4nPE9g=
+github.com/BobuSumisu/aho-corasick v1.0.3/go.mod h1:hm4jLcvZKI2vRF2WDU1N4p/jpWtpOzp3nLmi9AzX/XE=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
@@ -119,8 +121,9 @@ github.com/containerd/stargz-snapshotter/estargz v0.14.3 h1:OqlDCK3ZVUO6C3B/5FSk
 github.com/containerd/stargz-snapshotter/estargz v0.14.3/go.mod h1:KY//uOCIkSuNAHhJogcZtrNHdKrA99/FCCRjE3HD36o=
 github.com/couchbase/gocb/v2 v2.6.3 h1:5RsMo+RRfK0mVxHLAfpBz3/tHlgXZb1WBNItLk9Ab+c=
 github.com/couchbase/gocb/v2 v2.6.3/go.mod h1:yF5F6BHTZ/ZowhEuZbySbXrlI4rHd1TIhm5azOaMbJU=
-github.com/couchbase/gocbcore/v10 v10.2.3 h1:PEkRSNSkKjUBXx82Ucr094+anoiCG5GleOOQZOHo6D4=
 github.com/couchbase/gocbcore/v10 v10.2.3/go.mod h1:lYQIIk+tzoMcwtwU5GzPbDdqEkwkH3isI2rkSpfL0oM=
+github.com/couchbase/gocbcore/v10 v10.2.4 h1:TDTQ1mSBUw9eajuV71ZDJcLRbmfGcsvZV9SMeUDAVGc=
+github.com/couchbase/gocbcore/v10 v10.2.4/go.mod h1:lYQIIk+tzoMcwtwU5GzPbDdqEkwkH3isI2rkSpfL0oM=
 github.com/couchbaselabs/gocaves/client v0.0.0-20230307083111-cc3960c624b1/go.mod h1:AVekAZwIY2stsJOMWLAS/0uA/+qdp7pjO8EHnl61QkY=
 github.com/couchbaselabs/gocaves/client v0.0.0-20230404095311-05e3ba4f0259 h1:2TXy68EGEzIMHOx9UvczR5ApVecwCfQZ0LjkmwMI6g4=
 github.com/couchbaselabs/gocaves/client v0.0.0-20230404095311-05e3ba4f0259/go.mod h1:AVekAZwIY2stsJOMWLAS/0uA/+qdp7pjO8EHnl61QkY=
@@ -382,8 +385,6 @@ github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaR
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/paulbellamy/ratecounter v0.2.0 h1:2L/RhJq+HA8gBQImDXtLPrDXK5qAj6ozWVK/zFXVJGs=
 github.com/paulbellamy/ratecounter v0.2.0/go.mod h1:Hfx1hDpSGoqxkVVpBi/IlYD7kChlfo5C6hzIHwPqfFE=
-github.com/petar-dambovaliev/aho-corasick v0.0.0-20211021192214-5ab2d9280aa9 h1:lL+y4Xv20pVlCGyLzNHRC0I0rIHhIL1lTvHizoS/dU8=
-github.com/petar-dambovaliev/aho-corasick v0.0.0-20211021192214-5ab2d9280aa9/go.mod h1:EHPiTAKtiFmrMldLUNswFwfZ2eJIYBHktdaUTZxYWRw=
 github.com/pierrec/lz4/v4 v4.1.15 h1:MO0/ucJhngq7299dKLwIMtgTfbkoSPF6AoMYDd8Q4q0=
 github.com/pierrec/lz4/v4 v4.1.15/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
 github.com/pingcap/errors v0.11.4 h1:lFuQV/oaUMGcD2tqt+01ROSmJs75VG1ToEOkZIZ4nE4=

pkg/detectors/npmtoken/npmtoken.go

@@ -36,7 +36,6 @@ func (s Scanner) Keywords() []string {
 // FromData will find and optionally verify NpmToken secrets in a given set of bytes.
 func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (results []detectors.Result, err error) {
 	dataStr := string(data)
-
 	matches := keyPat.FindAllStringSubmatch(dataStr, -1)
 	for _, match := range matches {
 		if len(match) != 2 {

pkg/engine/engine.go

@@ -10,7 +10,7 @@ import (
 	"sync/atomic"
 	"time"
 
-	ahocorasick "github.com/petar-dambovaliev/aho-corasick"
+	ahocorasick "github.com/BobuSumisu/aho-corasick"
 	"golang.org/x/sync/errgroup"
 	"google.golang.org/protobuf/proto"
 
@@ -43,7 +43,7 @@ type Engine struct {
 
 	// prefilter is a ahocorasick struct used for doing efficient string
 	// matching given a set of words (keywords from the rules in the config)
-	prefilter ahocorasick.AhoCorasick
+	prefilter ahocorasick.Trie
 }
 
 type EngineOption func(*Engine)
@@ -150,13 +150,7 @@ func Start(ctx context.Context, options ...EngineOption) *Engine {
 	for _, d := range e.detectors[true] {
 		keywords = append(keywords, d.Keywords()...)
 	}
-	builder := ahocorasick.NewAhoCorasickBuilder(ahocorasick.Opts{
-		AsciiCaseInsensitive: true,
-		MatchOnlyWholeWords:  false,
-		MatchKind:            ahocorasick.LeftMostLongestMatch,
-		DFA:                  true,
-	})
-	e.prefilter = builder.Build(keywords)
+	e.prefilter = *ahocorasick.NewTrieBuilder().AddStrings(keywords).Build()
 
 	ctx.Logger().Info("loaded decoders", "count", len(e.decoders))
 	ctx.Logger().Info("loaded detectors",
@@ -297,8 +291,8 @@ func (e *Engine) detectorWorker(ctx context.Context) {
 				}
 
 				// build a map of all keywords that were matched in the chunk
-				for _, m := range e.prefilter.FindAll(string(decoded.Data)) {
-					matchedKeywords[strings.ToLower(string(decoded.Data[m.Start():m.End()]))] = struct{}{}
+				for _, m := range e.prefilter.MatchString(string(decoded.Data)) {
+					matchedKeywords[strings.ToLower(m.MatchString())] = struct{}{}
 				}
 
 				for verify, detectorsSet := range e.detectors {

pkg/pb/source_metadatapb/source_metadata.pb.go

@@ -2294,6 +2294,7 @@ type GoogleDrive struct {
 	Timestamp      string `protobuf:"bytes,4,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
 	Shared         bool   `protobuf:"varint,5,opt,name=shared,proto3" json:"shared,omitempty"`
 	LastModifiedBy string `protobuf:"bytes,6,opt,name=last_modified_by,json=lastModifiedBy,proto3" json:"last_modified_by,omitempty"`
+	Location       string `protobuf:"bytes,7,opt,name=location,proto3" json:"location,omitempty"`
 }
 
 func (x *GoogleDrive) Reset() {
@@ -2370,6 +2371,13 @@ func (x *GoogleDrive) GetLastModifiedBy() string {
 	return ""
 }
 
+func (x *GoogleDrive) GetLocation() string {
+	if x != nil {
+		return x.Location
+	}
+	return ""
+}
+
 type MetaData struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -3049,7 +3057,7 @@ var file_source_metadata_proto_rawDesc = []byte{
 	0x73, 0x18, 0x05, 0x20, 0x01, 0x28, 0x03, 0x52, 0x05, 0x76, 0x69, 0x65, 0x77, 0x73, 0x12, 0x14,
 	0x0a, 0x05, 0x64, 0x6f, 0x63, 0x69, 0x64, 0x18, 0x06, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x64,
 	0x6f, 0x63, 0x69, 0x64, 0x12, 0x14, 0x0a, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x18, 0x07, 0x20,
-	0x01, 0x28, 0x09, 0x52, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x22, 0xab, 0x01, 0x0a, 0x0b, 0x47,
+	0x01, 0x28, 0x09, 0x52, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x22, 0xc7, 0x01, 0x0a, 0x0b, 0x47,
 	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x44, 0x72, 0x69, 0x76, 0x65, 0x12, 0x12, 0x0a, 0x04, 0x66, 0x69,
 	0x6c, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x66, 0x69, 0x6c, 0x65, 0x12, 0x12,
 	0x0a, 0x04, 0x6c, 0x69, 0x6e, 0x6b, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6c, 0x69,
@@ -3060,104 +3068,106 @@ var file_source_metadata_proto_rawDesc = []byte{
 	0x18, 0x05, 0x20, 0x01, 0x28, 0x08, 0x52, 0x06, 0x73, 0x68, 0x61, 0x72, 0x65, 0x64, 0x12, 0x28,
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+	0x74, 0x6f, 0x33,
 }
 
 var (

pkg/pb/source_metadatapb/source_metadata.pb.validate.go

@@ -2865,6 +2865,8 @@ func (m *GoogleDrive) validate(all bool) error {
 
 	// no validation rules for LastModifiedBy
 
+	// no validation rules for Location
+
 	if len(errors) > 0 {
 		return GoogleDriveMultiError(errors)
 	}

pkg/sources/chunker.go

@@ -12,6 +12,8 @@ const (
 	ChunkSize = 10 * 1024
 	// PeekSize is the size of the peek into the previous chunk.
 	PeekSize = 3 * 1024
+	// TotalChunkSize is the total size of a chunk with peek data.
+	TotalChunkSize = ChunkSize + PeekSize
 )
 
 // Chunker takes a chunk and splits it into chunks of ChunkSize.
@@ -19,27 +21,31 @@ func Chunker(originalChunk *Chunk) chan *Chunk {
 	chunkChan := make(chan *Chunk)
 	go func() {
 		defer close(chunkChan)
-		if len(originalChunk.Data) <= ChunkSize+PeekSize {
+		if len(originalChunk.Data) <= TotalChunkSize {
 			chunkChan <- originalChunk
 			return
 		}
 		r := bytes.NewReader(originalChunk.Data)
 		reader := bufio.NewReaderSize(bufio.NewReader(r), ChunkSize)
 		for {
-			chunkBytes := make([]byte, ChunkSize)
+			chunkBytes := make([]byte, TotalChunkSize)
 			chunk := *originalChunk
+			chunkBytes = chunkBytes[:ChunkSize]
 			n, err := reader.Read(chunkBytes)
 			if err != nil && !errors.Is(err, io.EOF) {
 				break
 			}
+			if n == 0 {
+				if errors.Is(err, io.EOF) {
+					break
+				}
+				continue
+			}
 			peekData, _ := reader.Peek(PeekSize)
-			chunk.Data = append(chunkBytes[:n], peekData...)
-			if n > 0 {
-				chunkChan <- &chunk
-			}
-			if errors.Is(err, io.EOF) {
-				break
-			}
+			copy(chunkBytes[n:], peekData)
+			chunk.Data = chunkBytes[:n+len(peekData)]
+
+			chunkChan <- &chunk
 		}
 	}()
 	return chunkChan

pkg/sources/chunker_test.go

@@ -72,3 +72,15 @@ func TestChunker(t *testing.T) {
 	}
 
 }
+
+func BenchmarkChunker(b *testing.B) {
+	data := bytes.Repeat([]byte("a"), ChunkSize*100)
+	chunk := &Chunk{
+		Data: data,
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		for range Chunker(chunk) {
+		}
+	}
+}