This repository will tell you how Navicat offline activation works.

• Navicat Activation Public Key

  It is a RSA-2048 public key that Navicat used to encrypt or decrypt offline activation information.

  It is stored in navicat.exe as a kind of resource called RCData. You can see it by a kind of software Resource Hacker. The concrete content is:

  -----BEGIN PUBLIC KEY-----
  MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw1dqF3SkCaAAmMzs889I
  qdW9M2dIdh3jG9yPcmLnmJiGpBF4E9VHSMGe8oPAy2kJDmdNt4BcEygvssEfginv
  a5t5jm352UAoDosUJkTXGQhpAWMF4fBmBpO3EedG62rOsqMBgmSdAyxCSPBRJIOF
  R0QgZFbRnU0frj34fiVmgYiLuZSAmIbs8ZxiHPdp1oD4tUpvsFci4QJtYNjNnGU2
  WPH6rvChGl1IRKrxMtqLielsvajUjyrgOC6NmymYMvZNER3htFEtL1eQbCyTfDmt
  YyQ1Wt4Ot12lxf0wVIR5mcGN7XCXJRHOFHSf1gzXWabRSvmt1nrl7sW6cjxljuuQ
  awIDAQAB
  -----END PUBLIC KEY-----

  If you have the corresponding private key, please tell me. I would be very appreciated for your generous.

• Request Code

  It is a Base64 string that represents 256-bytes-long data, while the 256-bytes-long data is the cipher text of the offline activation information encrypted by Navicat Activation Public Key.

• Offline Activation Request Information

  It is just a JSON-style ASCII string which contains 3 items. Respectively they are "K", "DI" and "P", which represent snKey, checksum (related with your machine and OS), Platform (Appropriately speaking, it should be OS Type).

  Like:

  {"K": "xxxxxxxxxxxxxxxx", "DI": "yyyyyyyyyyyyy", "P": "WIN8"}

• Activation Code

  It is a Base64 string that represents 256-bytes-long data, while the 256-bytes-long data is the cipher text of the offline activation response information encrypted by Navicat Activation Private Key (so far, we don't know official activation private key).

• Offline Activation Response Information

  Just like Offline Activation Request Information, it is also a JSON-style ASCII string. But it contains 5 items. Respectively they are "K", "N", "O", "T", 'DI'.

  "K" and "DI" has the same meaning mentioned in Offline Activation Request Information and must be same with the corresponding items in Offline Activation Request Information.

  "N", "O", "T" represent Name, Organization, Time respectively. Name and Organization are string and the type of Time is unknown.

  "T" can be omitted.

• snKey

  It is a 4-block-long string, while every block is 4-chars-long.

  snKey is generated by 10-bytes-long data. In order to explain it easily, I use data[10] to represent the 10-bytes-long data.

  1. data[0] and data[1] must be 0x68 and 0x2A respectively.

     May change when Navicat product changes. Uncertain yet.

  2. data[2], data[3] and data[4] can be any byte. Just set them whatever you want.

     May change when Navicat product changes. Uncertain yet. But it's very possible right.

  3. data[5] and data[6] must be 0xCE and 0x32 respectively.

     May change when Navicat product changes. Uncertain yet.

  4. data[7] represents whether it is commercial license or non-commercial license.

     In Navicat 12: 0x65 is commercial license, 0x66 is non-commercial license.
     In Navicat 11: 0x15 is commercial license, 0x16 is non-commercial license.

     May change when Navicat product changes. Uncertain yet.
Must change when version change.

  5. High 4 bits of data[8] represents version number. Low 4 bits is unknown, but we can use it to delay activation deadline. Possible value is 0000 or 0001.

     In Navicat 12: High 4 bits must be 1100, which is the binary of number 12. In Navicat 11: High 4 bits must be 1011, which is the binary of number 11.

     Must change when version change.

  6. data[9] is unknown, but you can set it 0xFD or 0xFC or 0xFB if you want to use not-for-resale license.

     May change when Navicat product changes. Uncertain yet.

  After that. Navicat use DES with ECB mode to encrypt the last 8 bytes which are from data[2] to data[9].

  The DES key is:

  unsigned char DESKey = { 0x64, 0xAD, 0xF3, 0x2F, 0xAE, 0xF2, 0x1A, 0x27 };

  Then encode the 10-bytes-long data:

  1. Regard data[10] as a 80-bits-long data.

     If data[10] starts with 0x68 and 0x2A, so the 80-bits-long data is 01011000 00101010......

  2. Divide the 80-bits-long data as 16 5-bits-long blocks.

     If data[10] starts with 0x68 and 0x2A, so the 80-bits-long data is 01011, 00000, 10101, 0...., ...

  3. So the value every block is less than 32. Map them by a encode-table:

     char EncodeTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";

     Then you will get a 16-char-long string.

     If data[10] starts with 0x68 and 0x2A, so after encoded, it should starts with "N", "A", "V".

  4. Divide the 16-char-long string to four 4-chars-long blocks, Then you get snKey.

1. Check whether sn_Key that user inputs is legal.

2. After user clicks Activate, Navicat will start online activation first. If fails, user can choose offline activation.

3. Navicat will use the snKey that user inputs and some information collected from user's machine to generate Offline Activation Request Information, then encrypt it by Navicat Activation Public Key and return Base64-encoded string as Request Code.

4. In legal way, the Request Code should be sent to Navicat official activation server by a Internet-accessible computer. And Navicat official activation server will return a legal Activation Code.

   But now, we use keygen to play the official activation server's role.

   1. According to the Request Code, Get "DI" value and "K" value.

   2. Fill Offline Activation Response Information with "K" value, name, organization name and "DI" value.

   3. Encrypt Offline Activation Response Information by Navicat Activation Private Key and you will get 256-byte-long data.

   4. Encode 256-byte-long data by Base64. The result is Activation Code.

5. Input Activation Code, then offline activation is done.