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read received DM. showed them.

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cant send DM, nor read sent DMs.
This commit is contained in:
Vishal 2022-09-02 01:14:23 +05:30
parent 45e3d8c357
commit 7c3bb36c63
3 changed files with 79 additions and 109 deletions
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2
lib/console_ui.dart
View File

@ -554,7 +554,7 @@ Future<void> channelMenuUI(Store node) async {
pageNum = (int.tryParse(messageToSend))??1;
} else {
// send message to the given room
await sendChatMessage(node, fullChannelId, messageToSend);
await sendDirectMessage(node, fullChannelId, messageToSend);
pageNum = 1; // reset it
}
}

155
lib/event_ds.dart
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@ -4,20 +4,10 @@ import 'package:intl/intl.dart';
import 'package:translator/translator.dart';
import 'package:crypto/crypto.dart';
import 'package:nostr_console/settings.dart';
import 'package:kepler/kepler.dart';
import "dart:typed_data";
import "dart:math";
import 'dart:convert' as convert;
import "package:pointycastle/export.dart";
import 'package:hex/hex.dart';
import 'package:base58check/base58.dart';
import 'package:pointycastle/src/impl/secure_random_base.dart';
import "package:pointycastle/src/registry/registry.dart";
import "package:pointycastle/src/ufixnum.dart";
import "package:pointycastle/export.dart";
import 'package:kepler/kepler.dart';
int gDebug = 0;
@ -179,13 +169,7 @@ class EventData {
}
void translateAndExpandMentions() {
if (content == "") {
return;
}
if( evaluatedContent != "") {
if (content == "" || evaluatedContent != "") {
return;
}
@ -213,76 +197,48 @@ class EventData {
break;
case 4:
break;
// not implemented yet. has issues.
if( pubkey == userPublicKey)
break;
if(!isUserDirectMessage(this)) {
break;
}
printEventData(0);
print("\n\n");
{ // sample from kepler
var alice = Kepler.generateKeyPair();
print(
"alice private key: " +
Kepler.strinifyPrivateKey(alice.privateKey as ECPrivateKey),
);
print(
"alice public key: " +
Kepler.strinifyPublicKey(alice.publicKey as ECPublicKey),
);
// Create Bob's keypair
var bob = Kepler.generateKeyPair();
// This is what alice wants to say to bob
var rawStr = 'Encrypt and decrypt data using secp256k1';
// use alic's privatekey and bob's publickey means alice says to bob
var encMap = Kepler.pubkeyEncrypt(
Kepler.strinifyPrivateKey(alice.privateKey as ECPrivateKey),
Kepler.strinifyPublicKey(bob.publicKey as ECPublicKey),
rawStr,
);
// Get encrypted base64 string
var encStr = encMap['enc'];
print("encrypted text: " + encStr!);
// Get random IV
var iv = encMap['iv'];
print("iv: " + iv!);
// Now, you can send enc_str and IV to Bob
// Use bob's privatekey and alice's publickey to decrypt alices message, for Bob to read.
var decryptd = Kepler.privateDecrypt(
Kepler.strinifyPrivateKey(bob.privateKey as ECPrivateKey),
Kepler.strinifyPublicKey(alice.publicKey as ECPublicKey),
encStr,
iv,
);
print('decrypted text: $decryptd');
}
print("in translateAndExpandMentions() for a dm pubkey = $pubkey content = $content");
print("tags = $tags");
/*print("in translateAndExpandMentions() for a dm \npubkey = $pubkey \ncontent = $content");
print("tags = $tags\n");
*/
int ivIndex = content.indexOf("?iv=");
var enc_str = content.substring(0, ivIndex);
var iv = content.substring( ivIndex + 4, content.length);
print("enc_str = $enc_str ; iv = $iv");
var decryptd = myPrivateDecrypt( userPrivateKey, "03" + pubkey, enc_str, iv); // use bob's privatekey and alic's publickey means bob can read message from alic
print('they say:${decryptd}');
break;
//print("enc_str = $enc_str ; iv = $iv");
var decryptd = myPrivateDecrypt( userPrivateKey, "02" + pubkey, enc_str, iv); // use bob's privatekey and alic's publickey means bob can read message from alic
evaluatedContent = decryptd;
//printEventData(0);
//print("\n\n");
break;
} // end switch
} // end translateAndExpandMentions
Uint8List aesCbcDecrypt(Uint8List key, Uint8List iv, Uint8List cipherText) {
// Create a CBC block cipher with AES, and initialize with key and IV
final cbc = CBCBlockCipher(AESFastEngine())
..init(false, ParametersWithIV(KeyParameter(key), iv)); // false=decrypt
// Decrypt the cipherText block-by-block
final paddedPlainText = Uint8List(cipherText.length); // allocate space
var offset = 0;
while (offset < cipherText.length) {
offset += cbc.processBlock(cipherText, offset, paddedPlainText, offset);
}
assert(offset == cipherText.length);
return paddedPlainText;
}
// only applicable for kind 42 event
String getChatRoomId() {
if( kind != 42) {
@ -611,7 +567,6 @@ bool processKind3Event(Event newContactEvent) {
return newEntry || entryModified;
}
// returns name by looking up global list gKindONames, which is populated by kind 0 events
String getAuthorName(String pubkey) {
String max3(String v) => v.length > 3? v.substring(0,3) : v.substring(0, v.length);
@ -623,7 +578,7 @@ String getAuthorName(String pubkey) {
Set<String> getPublicKeyFromName(String userName) {
Set<String> pubkeys = {};
if(gDebug >= 0) print("In getPublicKeyFromName: doing lookup for $userName len of gKindONames= ${gKindONames.length}");
if(gDebug > 0) print("In getPublicKeyFromName: doing lookup for $userName len of gKindONames= ${gKindONames.length}");
gKindONames.forEach((pk, value) {
// check both the user name, and the pubkey to search for the user
@ -646,9 +601,6 @@ int getSecondsDaysAgo( int N) {
return DateTime.now().subtract(Duration(days: N)).millisecondsSinceEpoch ~/ 1000;
}
void printUnderlined(String x) => { print("$x\n${getNumDashes(x.length)}")};
void printDepth(int d) {
@ -712,7 +664,6 @@ bool isWhitespace(String s) {
return s[0] == ' ' || s[0] == '\n' || s[0] == '\r' || s[0] == '\t';
}
extension StringX on String {
isChannelPageNumber(int max) {
@ -751,7 +702,6 @@ extension StringX on String {
return false;
}
isLatinAlphabet({caseSensitive = false}) {
int countLatinletters = 0;
for (int i = 0; i < length; i++) {
@ -770,7 +720,6 @@ extension StringX on String {
}
}
// The contact only stores id and relay of contact. The actual name is stored in a global variable/map
class Contact {
String id, relay;
@ -820,9 +769,7 @@ bool isUserDirectMessage(EventData directMessageData) {
return sentToUser;
}
/// Decrypt data using self private key
/// Decrypt data using self private key
String myPrivateDecrypt(
String privateString, String publicString, String b64encoded,
[String b64IV = ""]) {
@ -834,20 +781,38 @@ String myPrivateDecrypt(
}
Uint8List myPrivateDecryptRaw(
String privateString, String publicString, Uint8List encdData,
String privateString, String publicString, Uint8List cipherText,
[String b64IV = ""]) {
final secretIV = Kepler.byteSecret(privateString, publicString);
final secret = Uint8List.fromList(secretIV[0]);
final key = Uint8List.fromList(secretIV[0]);
final iv = b64IV.length > 6
? convert.base64.decode(b64IV)
: Uint8List.fromList(secretIV[1]);
ChaCha20Engine _cipher = ChaCha20Engine();
_cipher.reset();
_cipher.init(false, buildParams(secret, iv));
return _cipher.process(encdData);
// pointy castle source https://github.com/PointyCastle/pointycastle/blob/master/tutorials/aes-cbc.md
final cbc = CBCBlockCipher(AESFastEngine())
..init(false, ParametersWithIV(KeyParameter(key), iv)); // false=decrypt
// Decrypt the cipherText block-by-block
final paddedPlainText = Uint8List(cipherText.length); // allocate space
//print("going into while");
var offset = 0;
while (offset < cipherText.length) {
/*
convert.Utf8Decoder decode = const convert.Utf8Decoder();
print('in while loop $offset $paddedPlainText len = ${paddedPlainText}');
print( "paddedPlainText converted: ${decode.convert(paddedPlainText)}");
print("");
*/
offset += cbc.processBlock(cipherText, offset, paddedPlainText, offset);
}
assert(offset == cipherText.length);
return paddedPlainText;
}
ParametersWithIV<KeyParameter> buildParams(

31
lib/tree_ds.dart
View File

@ -845,24 +845,29 @@ class Store {
// shows the given directRoomId, where directRoomId is prefix-id or pubkey of the other user. returns full id of other user.
String showDirectRoom(String directRoomId, [int page = 1]) {
if( !directRooms.containsKey(directRoomId)) {
if( directRoomId.length > 64) { // TODO revisit cause if name is > 64 should not return
return "";
}
if( directRoomId.length != 64) {
return "";
}
for( String key in directRooms.keys) {
if( key == directRoomId ) {
DirectMessageRoom? room = directRooms[key];
if( room != null) {
printDirectMessageRoom(room, page);
Set<String> lookedUpName = getPublicKeyFromName(directRoomId);
if( lookedUpName.length == 1) {
DirectMessageRoom? room = directRooms[lookedUpName.first];
if( room != null) {
printDirectMessageRoom(room, page);
return lookedUpName.first;
}
} else {
//print("got more than one pubkey for $directRoomId which are $lookedUpName");
for( String key in directRooms.keys) {
//print("in direct room key = $key");
if( key == directRoomId) {
DirectMessageRoom? room = directRooms[key];
if( room != null) {
printDirectMessageRoom(room, page);
return key;
}
}
return key;
}
}
return "";
}