narayana/anotherim
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anotherim/src/main/java/eu/siacs/conversations/Config.java
Daniel Gultsch aecb771ab5 use 16 byte IVs for http upload files larger than 768KiB 
Ever since Android 9+ switched to Conscrypt we can no longer efficiently
encrypt (and decrypt) large files with AES-GCM. We did’t notice this before
because when using 16 byte IVs even modern Androids will fall back to bouncy
castle. However the 'bug'/'feature' in Conscrypt surfaced when we switched over
to 12 byte IVs (which uses Conscrypt on Android 9+)
Switching back entirely to 16 byte IVs is undesirable as this would break
compatibility with Monal. So we end up with a weird compromise where we use
12 byte for normale plain text OMEMO messages and 'small' files where the
inefficiencies aren’t a problem.

The result of this commit is that Monal won’t be able to receive our files
larger than 768KiB. However the alternative is that Conversations would always
OOM when attempting to send larger files (where large depends on the available
RAM.)

fixes #3653
2020-03-08 13:13:19 +01:00

191 lines
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package eu.siacs.conversations;
import android.graphics.Bitmap;
import java.util.Collections;
import java.util.List;
import eu.siacs.conversations.xmpp.chatstate.ChatState;
import rocks.xmpp.addr.Jid;
public final class Config {
private static final int UNENCRYPTED = 1;
private static final int OPENPGP = 2;
private static final int OTR = 4;
private static final int OMEMO = 8;
private static final int ENCRYPTION_MASK = UNENCRYPTED | OPENPGP | OTR | OMEMO;
public static boolean supportUnencrypted() {
return (ENCRYPTION_MASK & UNENCRYPTED) != 0;
}
public static boolean supportOpenPgp() {
return (ENCRYPTION_MASK & OPENPGP) != 0;
}
public static boolean supportOmemo() {
return (ENCRYPTION_MASK & OMEMO) != 0;
}
public static boolean multipleEncryptionChoices() {
return (ENCRYPTION_MASK & (ENCRYPTION_MASK - 1)) != 0;
}
public static final String LOGTAG = BuildConfig.LOGTAG;
public static final Jid BUG_REPORTS = Jid.of("bugs@conversations.im");
public static final String DOMAIN_LOCK = null; //only allow account creation for this domain
public static final String MAGIC_CREATE_DOMAIN = "conversations.im";
public static final String QUICKSY_DOMAIN = "quicksy.im";
public static final String CHANNEL_DISCOVERY = "https://search.jabber.network";
public static final boolean DISALLOW_REGISTRATION_IN_UI = false; //hide the register checkbox
public static final boolean USE_RANDOM_RESOURCE_ON_EVERY_BIND = false;
public static final boolean ALLOW_NON_TLS_CONNECTIONS = false; //very dangerous. you should have a good reason to set this to true
public static final long CONTACT_SYNC_RETRY_INTERVAL = 1000L * 60 * 5;
//Notification settings
public static final boolean HIDE_MESSAGE_TEXT_IN_NOTIFICATION = false;
public static final boolean ALWAYS_NOTIFY_BY_DEFAULT = false;
public static final boolean SUPPRESS_ERROR_NOTIFICATION = false;
public static final boolean DISABLE_BAN = false; // disables the ability to ban users from rooms
public static final int PING_MAX_INTERVAL = 300;
public static final int IDLE_PING_INTERVAL = 600; //540 is minimum according to docs;
public static final int PING_MIN_INTERVAL = 30;
public static final int LOW_PING_TIMEOUT = 1; // used after push received
public static final int PING_TIMEOUT = 15;
public static final int SOCKET_TIMEOUT = 15;
public static final int CONNECT_TIMEOUT = 90;
public static final int POST_CONNECTIVITY_CHANGE_PING_INTERVAL = 30;
public static final int CONNECT_DISCO_TIMEOUT = 20;
public static final int MINI_GRACE_PERIOD = 750;
public static final boolean XEP_0392 = true; //enables XEP-0392 v0.6.0
public static final int AVATAR_SIZE = 192;
public static final Bitmap.CompressFormat AVATAR_FORMAT = Bitmap.CompressFormat.JPEG;
public static final int AVATAR_CHAR_LIMIT = 9400;
public static final int IMAGE_SIZE = 1920;
public static final Bitmap.CompressFormat IMAGE_FORMAT = Bitmap.CompressFormat.JPEG;
public static final int IMAGE_QUALITY = 75;
public static final int MESSAGE_MERGE_WINDOW = 20;
public static final int PAGE_SIZE = 50;
public static final int MAX_NUM_PAGES = 3;
public static final int MAX_SEARCH_RESULTS = 300;
public static final int REFRESH_UI_INTERVAL = 500;
public static final int MAX_DISPLAY_MESSAGE_CHARS = 4096;
public static final int MAX_STORAGE_MESSAGE_CHARS = 2 * 1024 * 1024; //2MB
public static final long MILLISECONDS_IN_DAY = 24 * 60 * 60 * 1000;
//remove *other* omemo devices from *your* device list announcement after not seeing any activity from them for 42 days. They will automatically add themselves after coming back online.
public static final long OMEMO_AUTO_EXPIRY = 42 * MILLISECONDS_IN_DAY;
public static final boolean REMOVE_BROKEN_DEVICES = false;
public static final boolean OMEMO_PADDING = false;
public static final boolean PUT_AUTH_TAG_INTO_KEY = true;
public static final boolean USE_BOOKMARKS2 = false;
public static final boolean DISABLE_PROXY_LOOKUP = false; //useful to debug ibb
public static final boolean USE_DIRECT_JINGLE_CANDIDATES = true;
public static final boolean DISABLE_HTTP_UPLOAD = false;
public static final boolean EXTENDED_SM_LOGGING = false; // log stanza counts
public static final boolean BACKGROUND_STANZA_LOGGING = false; //log all stanzas that were received while the app is in background
public static final boolean RESET_ATTEMPT_COUNT_ON_NETWORK_CHANGE = true; //setting to true might increase power consumption
public static final boolean ENCRYPT_ON_HTTP_UPLOADED = false;
public static final boolean X509_VERIFICATION = false; //use x509 certificates to verify OMEMO keys
public static final boolean ONLY_INTERNAL_STORAGE = false; //use internal storage instead of sdcard to save attachments
public static final boolean IGNORE_ID_REWRITE_IN_MUC = true;
public static final boolean MUC_LEAVE_BEFORE_JOIN = true;
public static final boolean USE_LMC_VERSION_1_1 = true;
public static final long MAM_MAX_CATCHUP = MILLISECONDS_IN_DAY * 5;
public static final int MAM_MAX_MESSAGES = 750;
public static final ChatState DEFAULT_CHAT_STATE = ChatState.ACTIVE;
public static final int TYPING_TIMEOUT = 8;
public static final int EXPIRY_INTERVAL = 30 * 60 * 1000; // 30 minutes
public static final String[] ENABLED_CIPHERS = {
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA384",
"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA256",
"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
"TLS_DHE_RSA_WITH_AES_128_GCM_SHA256",
"TLS_DHE_RSA_WITH_AES_128_GCM_SHA384",
"TLS_DHE_RSA_WITH_AES_256_GCM_SHA256",
"TLS_DHE_RSA_WITH_AES_256_GCM_SHA384",
"TLS_DHE_RSA_WITH_CAMELLIA_256_SHA",
// Fallback.
"TLS_RSA_WITH_AES_128_GCM_SHA256",
"TLS_RSA_WITH_AES_128_GCM_SHA384",
"TLS_RSA_WITH_AES_256_GCM_SHA256",
"TLS_RSA_WITH_AES_256_GCM_SHA384",
"TLS_RSA_WITH_AES_128_CBC_SHA256",
"TLS_RSA_WITH_AES_128_CBC_SHA384",
"TLS_RSA_WITH_AES_256_CBC_SHA256",
"TLS_RSA_WITH_AES_256_CBC_SHA384",
"TLS_RSA_WITH_AES_128_CBC_SHA",
"TLS_RSA_WITH_AES_256_CBC_SHA",
};
public static final String[] WEAK_CIPHER_PATTERNS = {
"_NULL_",
"_EXPORT_",
"_anon_",
"_RC4_",
"_DES_",
"_MD5",
};
public static class OMEMO_EXCEPTIONS {
//if the own account matches one of the following domains OMEMO won’t be turned on automatically
public static final List<String> ACCOUNT_DOMAINS = Collections.singletonList("s.ms");
//if the contacts domain matches one of the following domains OMEMO won’t be turned on automatically
//can be used for well known, widely used gateways
public static final List<String> CONTACT_DOMAINS = Collections.singletonList("cheogram.com");
}
private Config() {
}
public static final class Map {
public final static double INITIAL_ZOOM_LEVEL = 4;
public final static double FINAL_ZOOM_LEVEL = 15;
public final static int MY_LOCATION_INDICATOR_SIZE = 10;
public final static int MY_LOCATION_INDICATOR_OUTLINE_SIZE = 3;
public final static long LOCATION_FIX_TIME_DELTA = 1000 * 10; // ms
public final static float LOCATION_FIX_SPACE_DELTA = 10; // m
public final static int LOCATION_FIX_SIGNIFICANT_TIME_DELTA = 1000 * 60 * 2; // ms
}
}
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