Key Format

Scality key format (160 bits):

152 bits     Entropy
4 bits       Class
4 bits       Replica

Dovecot generated key:

120 bits         MD5 part prefix
                 md5(timestamp + process id + hostname)

8 bits           Scality Service ID (= 0x83)

8 bits           MD5 part suffix

8 bits           Object Type:
                  0x00 = Unknown
                  0x01 = Message
                  0x02 = FTS index
                  0x03 = FTS index (as of 2.2.27.2)
                  0x08-0x0e = Indexes

8 bits           Unused (0x00)

4 bits           Class ID (configurable)

4 bits           Replica ID (0x00)