use bouncycastle provider up to api 27

apparently using conscrypt on Android below version 7? throws an exception when using 16 byte IVs.
so we now use BC when ever possible (excluding api 28)

we don’t know why Conscrypt behaves differently on various android versions

1 files changed, 2 insertions, 2 deletions

diff --git a/src/main/java/de/pixart/messenger/crypto/axolotl/XmppAxolotlMessage.java b/src/main/java/de/pixart/messenger/crypto/axolotl/XmppAxolotlMessage.java
index 4b4395e60..71fbd40db 100644
--- a/src/main/java/de/pixart/messenger/crypto/axolotl/XmppAxolotlMessage.java
+++ b/src/main/java/de/pixart/messenger/crypto/axolotl/XmppAxolotlMessage.java
@@ -178,7 +178,7 @@ public class XmppAxolotlMessage {
         try {
             SecretKey secretKey = new SecretKeySpec(innerKey, KEYTYPE);
             IvParameterSpec ivSpec = new IvParameterSpec(iv);
-            Cipher cipher = Compatibility.twentyTwo() ? Cipher.getInstance(CIPHERMODE) : Cipher.getInstance(CIPHERMODE, PROVIDER);
+            Cipher cipher = Compatibility.twentyEight() ? Cipher.getInstance(CIPHERMODE) : Cipher.getInstance(CIPHERMODE, PROVIDER);
             cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);
             this.ciphertext = cipher.doFinal(Config.OMEMO_PADDING ? getPaddedBytes(plaintext) : plaintext.getBytes());
             if (Config.PUT_AUTH_TAG_INTO_KEY && this.ciphertext != null) {
@@ -294,7 +294,7 @@ public class XmppAxolotlMessage {
                     key = newKey;
                 }
 
-                Cipher cipher = Compatibility.twentyTwo() ? Cipher.getInstance(CIPHERMODE) : Cipher.getInstance(CIPHERMODE, PROVIDER);
+                Cipher cipher = Compatibility.twentyEight() ? Cipher.getInstance(CIPHERMODE) : Cipher.getInstance(CIPHERMODE, PROVIDER);
                 SecretKeySpec keySpec = new SecretKeySpec(key, KEYTYPE);
                 IvParameterSpec ivSpec = new IvParameterSpec(iv);