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Top Forums UNIX for Advanced & Expert Users How to determine the encoding of this dd image? Post 302905913 by NICEPeppino on Monday 16th of June 2014 04:08:17 AM
Old 06-16-2014
Gnome How to determine the encoding of this dd image?

I have extracted a raw data file from a magnetic tape using the dd command

Afterwards, I managed to read the extracted data with Bless HexEditor and I found out that at offset 0x200000 there is a sequence of value which originally was stored in a table.

I would like to extract this data and import it in an Excel or CSV file, but above all I would like to understand the data encryption.

This is an example of the data extracted in hexadecimal format and its representation in unsigned int little endian:
Code:
//Hex Not.    // Little-Endian unsigned int 32
10 00 00 00   // 84       (Ref Number)  
55 F1 2E 04   // 20070306 (Date)
A2 3F 32 01   // 15144184 (Time)
F8 14 E7 00   // 20070306 (Date)
A2 3F 32 01   // 15491037 (Time)
DD 5F EC 00   // 1
01 00 00 00   // 1
01 00 00 00   // 4486656
00 76 44 00   // 492
EC 01 00 00   // 1
01 00 00 00   // 814185724
FC 7C 87 30   // 814185728
00 7D 87 30   // 814185732
04 7D 87 30   // 16

New Line

10 00 00 00   // 84
55 F1 2E 04   // 20070306
A2 3F 32 01   // 15491037
DD 5F EC 00   // 20070306
A2 3F 32 01   // 15534889
29 0B ED 00   // 18
12 00 00 00   // 1
01 00 00 00   // 4486656
00 76 44 00   // 492
EC 01 00 00   // 1
01 00 00 00   // 814185724
FC 7C 87 30   // 814185728
00 7D 87 30   // 814185732
04 7D 87 30   // 16

Can you understand starting from this piece of converted data how the raw file is encoded and how I can create a bash script to decode it??

Thanks

Moderator's Comments:
Mod Comment Please use code tags next time for your code and data. Thanks

Last edited by NICEPeppino; 07-30-2014 at 08:03 AM..
 

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wanboot_keymgmt(1M)					  System Administration Commands				       wanboot_keymgmt(1M)

NAME
wanboot_keymgmt - insert and extract keys SYNOPSIS
/usr/lib/inet/wanboot/keymgmt -i -k key_file -s keystore -o type=keytype /usr/lib/inet/wanboot/keymgmt -x -f outfile -s keystore -o type=keytype DESCRIPTION
The keymgmt utility has two purposes: o To take a raw key, stored in key_file, and insert it in the repository specified by keystore. o To extract a key of a specified type from the repository specified by keystore, depositing it in outfile. outfile will be created if it does not already exist. The type of key being added or extracted is specified by keytype and may have one of four values: 3des, aes, rsa, or sha1 (the last used by HMAC SHA-1). When extracting a key, the first key with an OID matching the supplied type is used. ARGUMENTS
The following arguments are supported: -i Used in conjunction with -k to insert a raw key in keystore. -f outfile Used to specify a file to receive an extracted key. -k key_file Used in conjunction with -i to specify the file in which a raw key is stored. This key will be inserted in keystore. -o type=keytype Specifies the type of key being inserted or extracted. Must be one of 3des, aes, rsa, or sha1. -s keystore Specifies a repository in which a key will be inserted or from which a key will be extracted. -x Used in conjunction with -f to extract a key of a specified type and deposit it in outfile. EXIT STATUS
0 Successful operation. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWwbsup | +-----------------------------+-----------------------------+ |Interface Stability |Obsolete | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) ITU-T Recommendation X.208 SunOS 5.10 18 Apr 2003 wanboot_keymgmt(1M)
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