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check_exif_test.go
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check_exif_test.go
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package deanonymization
import (
"github.com/s-rah/onionscan/report"
"github.com/s-rah/onionscan/utils"
"io/ioutil"
"strings"
"testing"
)
var truncatedJpeg = []byte{
0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46, 0x49, 0x46, 0x00, 0x01, 0x02, 0x01, 0x01, 0x00,
0x01, 0x00, 0x00, 0x00, 0xff, 0xe1, 0x14, 0x0a, 0x45, 0x78, 0x69, 0x66, 0x00, 0x00, 0x49, 0x49}
var expectedExif = map[string]string{
"ColorSpace": "65535",
"ComponentsConfiguration": "\"\"",
"DateTime": "\"2012:11:04 05:42:02\"",
"ExifIFDPointer": "134",
"ExifVersion": "\"0210\"",
"FlashpixVersion": "\"0100\"",
"Orientation": "1",
"PixelXDimension": "0",
"PixelYDimension": "0",
"ResolutionUnit": "2",
"XResolution": "\"72/1\"",
"YCbCrPositioning": "1",
"YResolution": "\"72/1\"",
}
func TagsToMap(exiftags []report.ExifTag) map[string]string {
rv := make(map[string]string)
for _, tag := range exiftags {
rv[tag.Name] = tag.Value
}
return rv
}
func CompareMaps(t *testing.T, foundTags map[string]string, expectedTags map[string]string) {
var allTags []string
for k := range expectedTags {
allTags = append(allTags, k)
}
for k := range foundTags {
allTags = append(allTags, k)
}
utils.RemoveDuplicates(&allTags)
for _, tag := range allTags {
val1, ok1 := foundTags[tag]
val2, ok2 := expectedTags[tag]
if ok1 != ok2 {
if ok1 {
t.Errorf("Mismatch: tag %s found but not expected", tag)
} else {
t.Errorf("Mismatch: tag %s expected but not found", tag)
}
} else if val1 != val2 {
t.Errorf("Mismatch: tag %s found %s expected %s", tag, val1, val2)
}
}
}
func TestCheckExif(t *testing.T) {
ctx := CreateEnvContext(t)
defer ctx.Cleanup()
// Test 1: no EXIF images
CheckExif(ctx.osreport, ctx.report, ctx.osc)
if len(ctx.report.ExifImages) > 0 {
t.Errorf("Nothing crawled: Should not have detected EXIF")
}
// Test 2: corrupted JPEG image
ctx.CreateBinaryPage("/test.jpg", 200, "image/jpeg", truncatedJpeg)
CheckExif(ctx.osreport, ctx.report, ctx.osc)
if len(ctx.report.ExifImages) > 0 {
t.Errorf("Corrupt image: Should not have detected EXIF")
}
// Test 2: add real JPEG image
data, err := ioutil.ReadFile("testdata/f1-exif.jpg")
if err != nil {
t.Errorf("Error reading test image")
}
ctx.CreateBinaryPage("/test2.jpg", 200, "image/jpeg", data)
CheckExif(ctx.osreport, ctx.report, ctx.osc)
if len(ctx.report.ExifImages) != 1 {
t.Errorf("Should have detected EXIF in test image")
}
if !strings.HasSuffix(ctx.report.ExifImages[0].Location, "/test2.jpg") {
t.Errorf("Location on EXIF image doesn't match expected")
}
var foundTags = TagsToMap(ctx.report.ExifImages[0].ExifTags)
CompareMaps(t, foundTags, expectedExif)
}