NAME

       mobidrm — Utility for decryption and encryption of MOBI format ebook files.

SYNOPSIS

       mobidrm -d [-o dir] [-p pid] [-s serial] file
       mobidrm -e [-o dir] [-s serial] [-f date] [-t date] file
       mobidrm [-hv]

DESCRIPTION

       The  program  encrypts  or  decrypts  MOBI  files with DRM schemes used on eInk devices. It is powered by
       libmobi library.

       It may encrypt documents targeting particular device by using its serial number or applying  generic  DRM
       scheme targeting all supported readers.

       Optionally  encryption may be valid only during chosen period. Kindles require both start and end date to
       be set.  This tool allows one to specify only one date (start or end).  In such case the other date  will
       be automatically set to respectively lowest (1970-01-01) or largest (10136-02-16) valid value.

       In  case of hybrid files mobidrm separately encrypts both enclosed parts and produces two files: mobi for
       legacy format and azw3 for KF8 format.

       The program also decrypts documents. One must supply device serial number or  document  PID  if  DRM  was
       applied for specific device.

       Invoked without arguments prints usage summary and exits.

       A list of flags and their descriptions.

       Decryption flags:

       -d       Decrypt. This flag must be set in order to decrypt document.

       -p pid   Set optional decryption pid (may be specified multiple times).

       -s serial
                Set optional device serial number (may be specified multiple times).

       Encryption flags:

       -e       Encrypt. This flag must be set in order to encrypt document.

       -f date  Set  optional  validity  period  from  date  formatted as yyyy-mm-dd. Document will not be valid
                before this date.

       -s serial
                Set optional device serial number. If not set document will be  encrypted  with  generic  reader
                key. This flag may be specified multiple times to target multiple devices.

       -t date  Set  optional  validity  period to date formatted as yyyy-mm-dd. Document will expire after this
                date.

       Common flags:

       -o dir   Save output to dir folder.

       -h       Show usage summary and exit.

       -v       Show version and exit.

EXAMPLES

       The following command decrypts document using given serial number. Decrypted output will be saved to /tmp
       folder.

             % mobidrm -d -s B001XXXXXXXXXXXX -o /tmp example.mobi

       The following command decrypts document trying multiple PIDs.

             % mobidrm -d -p XXXXXXXXX1 -p XXXXXXXXX2 example.mobi

       The following command encrypts document targeting two devices using their serial numbers.  Document  will
       be readable only on those devices.

             % mobidrm -e -s B001XXXXXXXXXX01 -s B001XXXXXXXXXX02 example.mobi

       The  following command encrypts document for device with given serial number. Document will only be valid
       within given period (inclusive).

             % mobidrm -e -s B001XXXXXXXXXX01 -f 2021-01-01 -t 2021-01-31 example.mobi

RETURN VALUES

       The mobidrm utility returns 0 on success, 1 on error.

COPYRIGHT

       Copyright (C) 2021-2022 Bartek Fabiszewski.

       Released under LGPL version 3 or any later (same as libmobi).

WEB SITE

       Visit http://www.fabiszewski.net for details.

DIAGNOSTICS

       For diagnostics libmobi must be configured with --enable-debug option.

SEE ALSO

       mobimeta(1) mobitool(1)

Unix                                            February 16, 2022                                     mobidrm(1)