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-rw-r--r--src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java128
1 files changed, 105 insertions, 23 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java
index 9599aa37..7e4a4fc5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java
@@ -1,20 +1,35 @@
package de.thedevstack.conversationsplus.utils;
-import java.security.SecureRandom;
+import android.os.Bundle;
+import android.util.Pair;
+
+import org.bouncycastle.asn1.x500.X500Name;
+import org.bouncycastle.asn1.x500.style.BCStyle;
+import org.bouncycastle.asn1.x500.style.IETFUtils;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
+
+import java.security.MessageDigest;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.CertificateParsingException;
+import java.security.cert.X509Certificate;
import java.text.Normalizer;
+import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
+import java.util.Locale;
import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
public final class CryptoHelper {
public static final String FILETRANSFER = "?FILETRANSFERv1:";
private final static char[] hexArray = "0123456789abcdef".toCharArray();
- private final static char[] vowels = "aeiou".toCharArray();
- private final static char[] consonants = "bcdfghjklmnpqrstvwxyz".toCharArray();
final public static byte[] ONE = new byte[] { 0, 0, 0, 1 };
public static String bytesToHex(byte[] bytes) {
@@ -48,22 +63,6 @@ public final class CryptoHelper {
return result;
}
- public static String randomMucName(SecureRandom random) {
- return randomWord(3, random) + "." + randomWord(7, random);
- }
-
- private static String randomWord(int lenght, SecureRandom random) {
- StringBuilder builder = new StringBuilder(lenght);
- for (int i = 0; i < lenght; ++i) {
- if (i % 2 == 0) {
- builder.append(consonants[random.nextInt(consonants.length)]);
- } else {
- builder.append(vowels[random.nextInt(vowels.length)]);
- }
- }
- return builder.toString();
- }
-
/**
* Escapes usernames or passwords for SASL.
*/
@@ -96,11 +95,18 @@ public final class CryptoHelper {
} else if (fingerprint.length() < 40) {
return fingerprint;
}
+ StringBuilder builder = new StringBuilder(fingerprint.toLowerCase(Locale.US).replaceAll("\\s", ""));
+ for(int i=8;i<builder.length();i+=9) {
+ builder.insert(i, ' ');
+ }
+ return builder.toString();
+ }
+
+ public static String prettifyFingerprintCert(String fingerprint) {
StringBuilder builder = new StringBuilder(fingerprint);
- builder.insert(8, " ");
- builder.insert(17, " ");
- builder.insert(26, " ");
- builder.insert(35, " ");
+ for(int i=2;i < builder.length(); i+=3) {
+ builder.insert(i,':');
+ }
return builder.toString();
}
@@ -126,4 +132,80 @@ public final class CryptoHelper {
}
}
}
+
+ public static Pair<Jid,String> extractJidAndName(X509Certificate certificate) throws CertificateEncodingException, InvalidJidException, CertificateParsingException {
+ Collection<List<?>> alternativeNames = certificate.getSubjectAlternativeNames();
+ List<String> emails = new ArrayList<>();
+ if (alternativeNames != null) {
+ for(List<?> san : alternativeNames) {
+ Integer type = (Integer) san.get(0);
+ if (type == 1) {
+ emails.add((String) san.get(1));
+ }
+ }
+ }
+ X500Name x500name = new JcaX509CertificateHolder(certificate).getSubject();
+ if (emails.size() == 0) {
+ emails.add(IETFUtils.valueToString(x500name.getRDNs(BCStyle.EmailAddress)[0].getFirst().getValue()));
+ }
+ String name = IETFUtils.valueToString(x500name.getRDNs(BCStyle.CN)[0].getFirst().getValue());
+ if (emails.size() >= 1) {
+ return new Pair<>(Jid.fromString(emails.get(0)), name);
+ } else {
+ return null;
+ }
+ }
+
+ public static Bundle extractCertificateInformation(X509Certificate certificate) {
+ Bundle information = new Bundle();
+ try {
+ JcaX509CertificateHolder holder = new JcaX509CertificateHolder(certificate);
+ X500Name subject = holder.getSubject();
+ try {
+ information.putString("subject_cn", subject.getRDNs(BCStyle.CN)[0].getFirst().getValue().toString());
+ } catch (Exception e) {
+ //ignored
+ }
+ try {
+ information.putString("subject_o",subject.getRDNs(BCStyle.O)[0].getFirst().getValue().toString());
+ } catch (Exception e) {
+ //ignored
+ }
+
+ X500Name issuer = holder.getIssuer();
+ try {
+ information.putString("issuer_cn", issuer.getRDNs(BCStyle.CN)[0].getFirst().getValue().toString());
+ } catch (Exception e) {
+ //ignored
+ }
+ try {
+ information.putString("issuer_o", issuer.getRDNs(BCStyle.O)[0].getFirst().getValue().toString());
+ } catch (Exception e) {
+ //ignored
+ }
+ try {
+ MessageDigest md = MessageDigest.getInstance("SHA-1");
+ byte[] fingerprint = md.digest(certificate.getEncoded());
+ information.putString("sha1", prettifyFingerprintCert(bytesToHex(fingerprint)));
+ } catch (Exception e) {
+
+ }
+ return information;
+ } catch (CertificateEncodingException e) {
+ return information;
+ }
+ }
+
+ public static int encryptionTypeToText(int encryption) {
+ switch (encryption) {
+ case Message.ENCRYPTION_OTR:
+ return R.string.encryption_choice_otr;
+ case Message.ENCRYPTION_AXOLOTL:
+ return R.string.encryption_choice_omemo;
+ case Message.ENCRYPTION_NONE:
+ return R.string.encryption_choice_unencrypted;
+ default:
+ return R.string.encryption_choice_pgp;
+ }
+ }
}