@renovatebot/kbpgp/lib/openpgp/cfb.js

Keybase's PGP Implementation

// Generated by IcedCoffeeScript 112.8.1
var AES, WordArray, ciphers, decrypt, encrypt, ref;

ref = require('triplesec'), ciphers = ref.ciphers, WordArray = ref.WordArray;

AES = ciphers.AES;

encrypt = function(arg) {
  var block_cipher_class, block_size, c, cipher, e, iv, key, list, out, plaintext, pos;
  block_cipher_class = arg.block_cipher_class, key = arg.key, cipher = arg.cipher, plaintext = arg.plaintext, iv = arg.iv;
  block_cipher_class || (block_cipher_class = AES);
  cipher || (cipher = new block_cipher_class(WordArray.from_buffer(key)));
  block_size = cipher.blockSize;
  c = WordArray.from_buffer(iv.slice(0, block_size));
  pos = 0;
  list = (function() {
    var results;
    results = [];
    while (plaintext.length > pos) {
      cipher.encryptBlock(c.words, 0);
      e = c;
      c = WordArray.from_buffer(plaintext.slice(pos, pos + block_size));
      e.xor(c, {
        n_words: c.words.length
      });
      pos += block_size;
      c = e;
      results.push(e.to_buffer());
    }
    return results;
  })();
  out = Buffer.concat(list);
  return out.slice(0, plaintext.length);
};

decrypt = function(arg) {
  var b, block_cipher_class, block_size, cipher, ciphertext, d, i, iv, key, list, out, pos;
  block_cipher_class = arg.block_cipher_class, key = arg.key, cipher = arg.cipher, ciphertext = arg.ciphertext, iv = arg.iv;
  block_cipher_class || (block_cipher_class = AES);
  cipher || (cipher = new block_cipher_class(WordArray.from_buffer(key)));
  block_size = cipher.blockSize;
  iv || (iv = Buffer.from((function() {
    var j, ref1, results;
    results = [];
    for (i = j = 0, ref1 = block_size; 0 <= ref1 ? j < ref1 : j > ref1; i = 0 <= ref1 ? ++j : --j) {
      results.push(0);
    }
    return results;
  })()));
  b = WordArray.from_buffer(iv.slice(0, block_size));
  pos = 0;
  list = (function() {
    var results;
    results = [];
    while (ciphertext.length > pos) {
      cipher.encryptBlock(b.words, 0);
      d = b;
      b = WordArray.from_buffer(ciphertext.slice(pos, pos + block_size));
      d.xor(b, {});
      pos += block_size;
      results.push(d.to_buffer());
    }
    return results;
  })();
  out = Buffer.concat(list);
  return out.slice(out, ciphertext.length);
};

exports.encrypt = encrypt;

exports.decrypt = decrypt;

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