* `http`: padrão HTTP de sistemas autenticação, incluindo:
    * `bearer`: um header de `Authorization` com valor de `Bearer` adicionado de um token. Isso é herança do OAuth2.
    * HTTP Basic authentication.
    * HTTP Digest, etc.
* `oauth2`: todas as formas do OAuth2 para lidar com segurança (chamados "fluxos").
    * Vários desses fluxos são apropriados para construir um provedor de autenticação OAuth2 (como Google, Facebook, X (Twitter), GitHub, etc):

        this.fid = fid;
        this.offset = (int) (offset & 0xFFFFFFFFL);
        this.remaining = remaining;
        this.b = b;
        this.off = off;
        count = len;
        digest = null; /* otherwise recycled commands
                        * like writeandx will choke if session
                        * closes in between */
    }

    @Override

        dst[dstIndex++] = (byte) (byteCount & 0xFF);
        dst[dstIndex++] = (byte) (byteCount >> 8 & 0xFF);
        dstIndex += byteCount;

        length = dstIndex - start;

        if (digest != null) {
            digest.sign(dst, headerStart, length, this, response);
        }

        return length;
    }

    int decode(final byte[] buffer, int bufferIndex) {

        return baos.toByteArray();
    }

    private byte[] calculateBindingHash(byte[] bindingInfo) throws IOException {
        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-256");
            return digest.digest(bindingInfo);
        } catch (NoSuchAlgorithmException e) {
            throw new IOException("SHA-256 not available", e);
        }
    }

    for name, rev in peer.listkeys(b'bookmarks').items():
      h.update(name)
      h.update(b'=')
      h.update(rev)
      h.update(b'\n')
  print('r1:'+base64.standard_b64encode(h.digest()).decode('utf-8'))

@command(b'golookup', [], _('url rev'), norepo=True)
def golookup(ui, url, rev):
  """
  golookup looks up a single identifier in the repo,
  printing its hash.
  """

        this.fid = fid;
        this.offset = offset;
        this.remaining = remaining;
        this.b = b;
        this.off = off;
        dataLength = len;
        digest = null; /* otherwise recycled commands
                        * like writeandx will choke if session
                        * closes in between */
    }

    @Override
    int getBatchLimit(final byte command) {

        dstIndex += writeHeaderWireFormat(dst, dstIndex);
        dstIndex += writeAndXWireFormat(dst, dstIndex);
        length = dstIndex - start;

        if (digest != null) {
            digest.sign(dst, headerStart, length, this, response);
        }

        return length;
    }

    /*
     * We overload this because we want readAndXWireFormat to

        this.fid = fid;
        this.offset = (int) (offset & 0xFFFFFFFFL);
        this.remaining = remaining;
        this.b = b;
        this.off = off;
        this.count = len;
        this.digest = null; /*
                             * otherwise recycled commands
                             * like writeandx will choke if session
                             * closes in between
                             */
    }

      },
      "timestamp": {
        "type": "date",
        "format": "date_optional_time"
      },
      "expires": {
        "type": "date",
        "format": "date_optional_time"
      },
      "digest": {
        "type": "text",
        "index": false
      },
      "doc_id": {
        "type": "keyword"
      },
      "favorite_count": {
        "type": "long"
      },
      "filename": {

                    md4.update(responseKeyNT);
                    final byte[] userSessionKey = md4.digest();

                    final HMACT64 hmac = new HMACT64(userSessionKey);
                    hmac.update(sessionNonce);
                    final byte[] ntlm2SessionKey = hmac.digest();

                    if ((getFlags() & NTLMSSP_NEGOTIATE_KEY_EXCH) != 0) {
                        masterKey = new byte[16];