3. Script Language > String commands > !STR.- String Command

STR.Chars C

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MiniRobotLanguage (MRL)

STR.Chars C

Generate a string with random Bytes

Intention

The used PRNG (Pseudo Random Number Generator) provides a source of cryptographically strong random 'bytes for use in creating session keys, One-TIme Pads and other similar purposes.

This CPRNG is based on the recursion-with-carry generator, invented by George Marsaglia.

Estimated Cycle length is 3 x 10^47.

This PRNG Passes All Test in ENT and in DIEHARD

ENT Can be found at: http://www.fourmilab.ch/random/

DIEHARD Can be found at: http://stat.fsu.edu/~geo/diehard.html

The command itself looks like this:

STR.CHARS C|$$CNT|$$RES

And here is a small example:

: $$NUM=5

STR.CHARS C|$$NUM|$$RES

MBX.$$RES

This is a larger example which produces a Pad of size 50.

: $$CNT=50

STR.CHARS C|$$CNT|$$RES

LEN.$$RES|$$LEN

MBX.$$LEN->$$RES

ENR.

It brings up this output:

Use the CTF. - Copy-To-File to write it to a USB-Stick or Harddisk.

Syntax

STR.CHARS C|P1[|P2]

Parameter Explanation

P1 - length of desired random string in bytes. If omitted, a default length of 32 byte length is used.

P2 - destination variable, if omitted TOS will be used for the result.

Example

'*************************************

' STR.CHARS C

'*************************************

: $$CNT=50

STR.CHARS C|$$CNT|$$RES

LEN.$$RES|$$LEN

MBX.$$LEN->$$RES

ENR.

Remarks

While we have made any effort to produce PRNG's of highest quality, there is no absolute warranty whatever, that these randomly generated strings are safe for use with cryptographic or safety software, or even for password-generation on a specific computer-hardware. Therefore you have to use them on your own risk.

Below you can see the results of the so called "ENT-Test Suite" for OTP's generated with this PRNG.

Limitations:

String Operations

String Operations

STR.Chars C

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