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Code Issues Releases Wiki Activity

Added BIMI logging

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This commit is contained in:
M66B 2021-07-16 13:16:26 +02:00
parent a574d70fe3
commit 3d07d3e3a8
1 changed files with 21 additions and 7 deletions
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28
app/src/main/java/eu/faircode/email/Bimi.java
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@ -65,6 +65,9 @@ import java.util.Set;
import javax.net.ssl.HttpsURLConnection;
// Brand Indicators for Message Identification (BIMI)
// https://bimigroup.org/
public class Bimi {
// Beam me up, Scotty
private static final int CONNECT_TIMEOUT = 10 * 1000; // milliseconds
@ -77,6 +80,10 @@ public class Bimi {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
boolean bimi_vmc = prefs.getBoolean("bimi_vmc", false);
Bitmap bitmap = null;
boolean verified = !bimi_vmc;
// Get DNS record
String txt = selector + "._bimi." + domain;
Log.i("BIMI fetch TXT=" + txt);
DnsHelper.DnsRecord[] records = DnsHelper.lookup(context, txt, "txt");
@ -84,9 +91,7 @@ public class Bimi {
return null;
Log.i("BIMI got TXT=" + records[0].name);
Bitmap bitmap = null;
boolean verified = !bimi_vmc;
// Decode DNS record
Map<String, String> values = new HashMap<>();
String[] params = records[0].name.split(";");
for (String param : params) {
@ -96,9 +101,9 @@ public class Bimi {
values.put(kv[0].trim().toLowerCase(), kv[1].trim());
}
// Process DNS record
List<String> tags = new ArrayList<>(values.keySet());
Collections.sort(tags); // process certificate first
for (String tag : tags) {
switch (tag) {
// Version
@ -225,10 +230,16 @@ public class Bimi {
ASN1Sequence logotypeData = (ASN1Sequence) logotypeInfo.getObject();
ASN1Sequence logotypeImage = (ASN1Sequence) logotypeData.getObjectAt(0);
ASN1Sequence logotypeDetails = (ASN1Sequence) logotypeImage.getObjectAt(0);
DERIA5String mime = (DERIA5String) logotypeDetails.getObjectAt(0);
DERIA5String mediaType = (DERIA5String) logotypeDetails.getObjectAt(0);
Log.i("BIMI media type=" + mediaType.getString());
ASN1Sequence logotypeURI = (ASN1Sequence) logotypeDetails.getObjectAt(2);
if ("image/svg+xml".equalsIgnoreCase(mime.getString())) {
DERIA5String uri = (DERIA5String) logotypeURI.getObjectAt(0);
DERIA5String uri = (DERIA5String) logotypeURI.getObjectAt(0);
Log.i("BIMI log uri=" + uri.getString());
String mimeType = ImageHelper.getDataUriType(uri.getString());
if ("image/svg+xml".equalsIgnoreCase(mimeType)) {
InputStream is = ImageHelper.getDataUriStream(uri.getString());
bitmap = ImageHelper.renderSvg(is, Color.WHITE, scaleToPixels);
Log.i("BIMI URI image=" + bitmap.getWidth() + "x" + bitmap.getHeight());
@ -243,6 +254,8 @@ public class Bimi {
// Get trust anchors
Set<TrustAnchor> trustAnchors = new HashSet<>();
// Get root certificates from assets
for (String ca : context.getAssets().list(""))
if (ca.endsWith(".pem")) {
Log.i("Reading ca=" + ca);
@ -252,6 +265,7 @@ public class Bimi {
}
}
// Get root certificates from key store
KeyStore ks = KeyStore.getInstance("AndroidCAStore");
ks.load(null, null);
Enumeration<String> aliases = ks.aliases();