IBM Tivoli Netcool/OMNIbus SNMP Writer Gateway: Reference Guide

Table 11. nco_aes_crypt command line options
Command line option Description
-d or-e Use this option to specify the mode in which
the nco_aes_crypt tool runs:
d - decrypt mode
e - encrypt mode
The default is e.
-o string Use this option to specify the output file to
which the encrypted data will be written.
-k string Use this option to specify the path of the file
containing the key data.
-f string Use this option to specify the path of the file
containing data requiring encryption.
data Use this option to specify the data to be
encrypted or decrypted.
Encryption key file
The encryption key is stored in a flat file alongside the encrypted data. The key
storage file has an ASCII numeric key length indicator followed by a colon and the
key in binary form.
The format of the key file is as follows:
key_length:key_data
Where key_length is the length of the key in bits and the key_data is the key in
binary form. Valid length values are 128, 192 and 256.
For example:
128:1234567812345678
In this case, key_length is 128 since the ASCII string 1234567812345678 has 16
bytes (128 bits).
You can generate random or pre-defined keys of varying lengths using nco_keygen.
To generate a key file, use the following command:
nco_keygen -o outfile[-l length|-k]key][-h |-?]
The following table gives the descriptions of the above command line options.
Table 12. Encrytion key file command line options
Command line option Description
-o outfile Use this option to specify the output file
name.
-l length Use this option to specify the length (in bits)
of the key to write out.
The default is 128.
Note: The value that you specify must be
divisible by 8.
IBM Tivoli Netcool/OMNIbus SNMP Writer Gateway 25