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Brainwallet

JavaScript Client-Side Bitcoin Address Generator

Notable features

  • Online converter, including Base58 decoder and encoder
  • OpenSSL point conversion and compressed keys support
  • Armory and Electrum deterministic wallets implementation
  • RFC 1751 JavaScript implementation
  • Bitcoin transactions editor
  • Signing and verifying messages with bitcoin address
  • Litecoin support

Changes:

index.html changes:

  • Add key-file tab for downloading 32 bytes key, which can be using as password to encryption and decryption.
  • This value is available in separate field "passphrase" and generating as:
  • this = SHA256(priv_hex) XOR sha256(hash_of_random_seed + current_addr);
  • downloading as text and as file. This function in beginning of brainwallet.js
  • Come back the tab "Important Security Update!"
  • Add XOR page to do XOR values.
  • Add new tab t-addr. Conversion between transparent-addr <-> bitcoin-addr.

Brainwallet.js:

  • Add multistring variable "var random_seed" to specify custom random-seed.
  • Dynamic text, for toggle buttons - added.
  • Generator update:
  • Add field "Coin parameters".
  • Add toogle-button for "passphrase".
  • Add "hash of random_seed" field.
  • Add XOR button to get generated private key, XORed by "hash of random_seed".
  • Now the same password with different random_seed - give different private keys.
  • Add "Secure Random button" for generating "secret exponent" (private key HEX).
  • Add button to switch type of address (Default address, SegWit and transparent t-addr).
  • Add toogle trigger when "private key" selected.
  • "Toogle key" button triggered to do show private key, when private key selected.

"Chains" update:

  • add "hash of random seed" and XOR button. Generated keys and specified keys can be xored to this.
  • add two strings in Paper Backup - to encode "Chain Code" and this is compatible with previous brainwallet.

Converter update:

  • Add SHA-256 to converter.
  • Add converting bitocoin address to ZCash t-addr and t-addr to bitcoin address.
  • Using locally Get-queries there (separate function).
  • Uploading files, for textarea - added.
  • download textarea, as binary - added.
  • download result as UTF-8 encoded text - added.
  • RAW encoding for source code of files - added.
  • Now, you can see hex-code of file, for example. Also you can download the same file as binary.
  • Now, you can upload any binary file, as RAW-data, see base64 or hex, sign this, verify, then decode this from hex -> to base64 and download as binary. This is the same file, and this opened after renaming, with add extension.

"Sign" and "Verify" update:

  • Fix. Armory HEX now give the verified status, after message signed, in the case when another coin selected in the list.
  • ARCH -> Sign -> Armory HEX -> Sign message -> verify -> Signed message -> MESSAGE VERIFIED.

Coins list update:

  • Now list with the coins is scrollable. Height is limited.
  • Add separate parameter to array with coins.
  • Now can be specified is coin using compressed or uncompressed keys and addresess.
  • Add autoswitching for the status of "Compressed" button, when coin selected in the list.
  • Add autoswitching public key byte when coin selected in list.
  • Chains-tab: Armory and Electrum now supporting compressed keys and addresses.
  • EmerCoin - added. Domain coin: https://explorer.emercoin.com/nvs
  • SixEleven - added. Good coin for domain names, where is supporting CNAME, for dynamic dns.
  • Here you can see old version of this brainwallet: https://brain.611.to
  • VertCoin - added. https://www.coinexplorer.net/VTC
  • GeertCoin - added. Only 9.6 million total coins, short blockchain. Cheap coin.
  • Waves - added just for google. They have DEX with many different tokens traded each for each.

-This code need to be optimized and compress. So many comments there.

What need to fix? Check and verify signatures for another altcoins, using compressed private keys... For example, Geertcoin have compressed private keys and address...

  1. Go to https://username1565.github.io/brainwallet.github.io/
  2. Select Geertcoin in the list.
  3. Default private key in generator: RZUp8o9zpfvDqHixCok4gcHLneqpo8ZEQBM1dVzTLBZ9p5TDnxd5 address corresponded for this private key is GNaix3HVRokcTW9CPM9N8vsVtuzmjguTrv - both are compressed...
  4. Go to "Sign" tab, and press the button "Sign Message".
  5. Signed message can be verified now, in brainwallet bitcoin-qt version of this message, can be verified too, and only in brainwallet...

But in geertcoin-qt.exe this message cann't be verified! Also, message, signed in geertcoin-qt.exe cannt be verified in brainwallet... This need to test for all altcoins, where using compressed and uncompressed keys.

Best regards...