fbexport | exporting data and executing SQL statements | SQL Database library

The phonebook.ib is a proprietary file format. I did some analysis and got to the point where I am able to extract names and phones numbers from it.

• Header is 580 bytes and doesn't seem to contain anything interesting.
• Entries appear to begin with the entry length, encoded as 3 4-bit decimal nibbles followed by another digit (version number maybe?).

In my sample file all entries were 940 bytes and therefore had 94 03 as their first two bytes. Other field entries I identified at different offsets:

• entry+0x12a [1 byte]: Number of bytes representing phone number.
• entry+0x12b [1 byte]: Seems like a two-digit decimal coded flag. If high nibble is set (e.g. 10) then phone number begins with +.
• entry+0x12c: Phone number, decimal coded. For example, 123456 would appear as 21 43 65. Special digits:
  • a is *
  • b is #
  • f is ignored (seen as a last digit when the number of digits is not even).
• entry+0x16c [1 byte]: Name length.
• entry+0x16e: Name in UTF-16 (i.e. 2 bytes per char).

Taking your snippet as an example:

• 0x36e is the phone length, 4 bytes.
• 0x36f is the extra flag, high nibble is 0 so no + prefix.
• 0x370 is where the phone number begins, 07 12 80 88 translates to 70210888.

A simple reference parser can be found at my repo: https://github.com/yossigo/phonebook_ib_export