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| 1 | +package main |
| 2 | + |
| 3 | +/* |
| 4 | +This is an example of a test program that can execute a scan on a HTTP URL. |
| 5 | +It will return an array of AMaaS scan results as part of its JSON output. |
| 6 | +*/ |
| 7 | + |
| 8 | +import ( |
| 9 | + "context" |
| 10 | + "flag" |
| 11 | + "fmt" |
| 12 | + "io" |
| 13 | + "log" |
| 14 | + "os" |
| 15 | + "strings" |
| 16 | + |
| 17 | + amaasclient "github.com/trendmicro/tm-v1-fs-golang-sdk" |
| 18 | + |
| 19 | + "github.com/aws/aws-sdk-go-v2/config" |
| 20 | + "github.com/aws/aws-sdk-go-v2/service/s3" |
| 21 | + "github.com/aws/aws-sdk-go-v2/service/s3/types" |
| 22 | +) |
| 23 | + |
| 24 | +func main() { |
| 25 | + |
| 26 | + var bucketregion string |
| 27 | + var bucket string |
| 28 | + var key string |
| 29 | + |
| 30 | + var grpcAddr string |
| 31 | + var apiKey string |
| 32 | + var tls bool |
| 33 | + var caCert string |
| 34 | + var region string |
| 35 | + var pml bool |
| 36 | + var feedback bool |
| 37 | + var verbose bool |
| 38 | + var tag string |
| 39 | + var digest bool |
| 40 | + |
| 41 | + flag.StringVar(&bucketregion, "bucketregion", "us-west-2", "region for S3 bucket") |
| 42 | + flag.StringVar(&bucket, "bucket", "", "S3 bucket name") |
| 43 | + flag.StringVar(&key, "key", "", "S3 object key") |
| 44 | + |
| 45 | + flag.StringVar(&grpcAddr, "addr", "", "the address to connect to for GRPC") |
| 46 | + flag.StringVar(&apiKey, "apikey", "", "API key for service authentication") |
| 47 | + flag.BoolVar(&tls, "tls", false, "enable server TLS by client for GRPC.") |
| 48 | + flag.StringVar(®ion, "region", "", "the region to connect to") |
| 49 | + flag.BoolVar(&pml, "pml", false, "enable predictive machine learning detection") |
| 50 | + flag.BoolVar(&feedback, "feedback", false, "enable SPN feedback") |
| 51 | + flag.BoolVar(&verbose, "verbose", false, "enable verbose scan result") |
| 52 | + flag.StringVar(&tag, "tag", "", "tags to be used for scanning. separated by comma.") |
| 53 | + flag.StringVar(&caCert, "ca_cert", "", "CA certificate for self hosted AMaaS server") |
| 54 | + flag.BoolVar(&digest, "digest", false, "enable digest calculation. it might increase network traffic for cloud file.") |
| 55 | + |
| 56 | + flag.Parse() |
| 57 | + |
| 58 | + var ac *amaasclient.AmaasClient |
| 59 | + var err error |
| 60 | + |
| 61 | + if region != "" && grpcAddr != "" { |
| 62 | + log.Fatal("Both region and addr are specified. Please specify only one.") |
| 63 | + } else if region != "" { |
| 64 | + ac, err = amaasclient.NewClient(apiKey, region) |
| 65 | + if err != nil { |
| 66 | + log.Fatalf("Unable to create AMaaS scan client object. error: %v", err) |
| 67 | + } |
| 68 | + } else if grpcAddr != "" { |
| 69 | + ac, err = amaasclient.NewClientInternal(apiKey, grpcAddr, tls, caCert) |
| 70 | + if err != nil { |
| 71 | + log.Fatalf("Unable to create AMaaS scan client object. error: %v", err) |
| 72 | + } |
| 73 | + } else { |
| 74 | + log.Fatal("Neither region nor addr is specified. Please specify one.") |
| 75 | + } |
| 76 | + |
| 77 | + if pml { |
| 78 | + ac.SetPMLEnable() |
| 79 | + } |
| 80 | + |
| 81 | + if feedback { |
| 82 | + ac.SetFeedbackEnable() |
| 83 | + } |
| 84 | + |
| 85 | + if verbose { |
| 86 | + ac.SetVerboseEnable() |
| 87 | + } |
| 88 | + |
| 89 | + if !digest { |
| 90 | + // disable digest calculation to reduce network traffic if file is on cloud |
| 91 | + ac.SetDigestDisable() |
| 92 | + } |
| 93 | + |
| 94 | + var tagsArray []string |
| 95 | + if tag != "" { |
| 96 | + tagsArray = strings.Split(tag, ",") |
| 97 | + } |
| 98 | + |
| 99 | + reader, err := NewS3ClientReader(context.Background(), bucketregion, bucket, key) |
| 100 | + if err != nil { |
| 101 | + log.Fatalf("Unable to create S3 client reader. error: %v", err) |
| 102 | + } |
| 103 | + |
| 104 | + result, err := ac.ScanReader(reader, tagsArray) |
| 105 | + if err != nil { |
| 106 | + log.Fatalf("Unable to scan reader. error: %v", err) |
| 107 | + } |
| 108 | + |
| 109 | + fmt.Printf("%v", result) |
| 110 | + |
| 111 | + os.Exit(0) |
| 112 | +} |
| 113 | + |
| 114 | +type S3ClientReader struct { |
| 115 | + client *s3.Client |
| 116 | + bucket string |
| 117 | + key string |
| 118 | + size int64 |
| 119 | +} |
| 120 | + |
| 121 | +func NewS3ClientReader(ctx context.Context, bucketregion, bucket, key string) (*S3ClientReader, error) { |
| 122 | + // load default config from environment with specified region |
| 123 | + cfg, err := config.LoadDefaultConfig(ctx, config.WithRegion(bucketregion)) |
| 124 | + if err != nil { |
| 125 | + return nil, err |
| 126 | + } |
| 127 | + defer ctx.Done() |
| 128 | + |
| 129 | + // create S3 client with given config |
| 130 | + client := s3.NewFromConfig(cfg) |
| 131 | + |
| 132 | + attr, err := client.GetObjectAttributes(ctx, &s3.GetObjectAttributesInput{ |
| 133 | + Bucket: &bucket, |
| 134 | + Key: &key, |
| 135 | + ObjectAttributes: []types.ObjectAttributes{ |
| 136 | + types.ObjectAttributesObjectSize, |
| 137 | + }, |
| 138 | + }) |
| 139 | + if err != nil { |
| 140 | + return nil, err |
| 141 | + } |
| 142 | + |
| 143 | + if attr.ObjectSize == nil { |
| 144 | + return nil, fmt.Errorf("unable to get object size from S3") |
| 145 | + } |
| 146 | + |
| 147 | + return &S3ClientReader{ |
| 148 | + client: client, |
| 149 | + bucket: bucket, |
| 150 | + key: key, |
| 151 | + size: *attr.ObjectSize, |
| 152 | + }, nil |
| 153 | +} |
| 154 | + |
| 155 | +// S3ClientReader implements AmaasClientReader |
| 156 | +func (r *S3ClientReader) Identifier() string { |
| 157 | + return fmt.Sprintf("s3://%s/%s", r.bucket, r.key) |
| 158 | +} |
| 159 | + |
| 160 | +func (r *S3ClientReader) DataSize() (int64, error) { |
| 161 | + return r.size, nil |
| 162 | +} |
| 163 | + |
| 164 | +func (r *S3ClientReader) ReadBytes(offset int64, length int32) ([]byte, error) { |
| 165 | + var rng string = fmt.Sprintf("bytes=%d-%d", offset, offset+int64(length)-1) |
| 166 | + |
| 167 | + output, err := r.client.GetObject(context.Background(), &s3.GetObjectInput{ |
| 168 | + Bucket: &r.bucket, |
| 169 | + Key: &r.key, |
| 170 | + Range: &rng, |
| 171 | + }) |
| 172 | + if err != nil { |
| 173 | + return nil, err |
| 174 | + } |
| 175 | + defer output.Body.Close() |
| 176 | + |
| 177 | + bytes, err := io.ReadAll(output.Body) |
| 178 | + if err != nil && err != io.EOF { |
| 179 | + bytes = nil |
| 180 | + } |
| 181 | + |
| 182 | + return bytes, err |
| 183 | +} |
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