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Top Forums UNIX for Advanced & Expert Users How to determine the encoding of this dd image? Post 302905992 by NICEPeppino on Monday 16th of June 2014 12:56:16 PM
Old 06-16-2014
Thank you for your reply

I have heard many times that this job cannot be done without knowing the source of my data and how it has been written on the tape and I agree with you. Unfortunately, I must do it without any insight and this is the reason why I started looking at its hexadecimal notation with an hex editor.

The tape is a mix of metadata and voice audio and I need to figure out how I can decrypt both these source within the image.

Thanks to the hex editor I now understand that before each audio there is a piece information concerning the audio.

The information above is regarding this info.
My knowledge about reverse engineering is limited but I must do it (Job is Job Smilie)

Apprarently I was previously wrong since I have copied and pasted this piece of data on this
HTML Code:
http://www.scadacore.com/field-applications/miscellaneous/online-hex-converter.html
website and the data format seems to be big endian 32 Smilie

Btw I have typed this command in the shell to convert the file

Code:
cat file | strings --encoding=B > convToString

but something went wrong.

whereas the command
Code:
cat file | strings > convToString

convert it but with many errors

Any help?
 

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mkdevalloc(1M)						  System Administration Commands					    mkdevalloc(1M)

NAME
mkdevalloc - Make device_allocate entries SYNOPSIS
/usr/sbin/mkdevalloc DESCRIPTION
The mkdevalloc command writes to standard out a set of device_allocate(4) entries describing the system's frame buffer, audio and removable media devices. The mkdevalloc command is used by the init.d(4) scripts to create or update the /etc/security/device_allocate file. Entries are generated based on the device special files found in /dev. For the different categories of devices, the mkdevalloc command checks for the following files under /dev: audio /dev/audio, /dev/audioctl, /dev/sound/... tape /dev/rst*, /dev/nrst*, /dev/rmt/... floppy /dev/diskette, /dev/fd*, /dev/rdiskette, /dev/rfd* removable disk /dev/sr*, /dev/nsr*, /dev/dsk/c0t?d0s?, /dev/rdsk/c0t?d0s? frame buffer /dev/fb All entries set the device-minimum and device-maximum fields to the hex representations of ADMIN_LOW and ADMIN_HIGH, respectively. The device-authorization field is set to solaris.device.allocate, except for the framebuffer entry, where it is set to *. The device-name, device-type and device-clean fields are set to the following values: device-name device-type device-clean audio audio audio audio_clean_wrapper tape mag_tape_0,1,... st st_clean floppy floppy_0,1,... fd disk_clean removable disk cdrom_0,1,... sr disk_clean frame buffer framebuffer fb /bin/true ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Obsolete | +-----------------------------+-----------------------------+ SEE ALSO
allocate(1), bsmconv(1M), attributes(5) NOTES
mkdevalloc might not be supported in a future release of the Solaris operating system. SunOS 5.11 8 Oct 2003 mkdevalloc(1M)
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