Description
Generate independent uniform nonzero octets in 1..255 for a bounded padding test block; not a security protocol or cryptographic padding guarantee.
A random construction is defined by its sampling support: positions, permutations, complete tilings, proposal sequences or another explicit set. Uniform choices at one stage do not necessarily make final visible outcomes uniform. A replay seed gives a deterministic sequence; equal values can hide different sampled positions. These tools are for reproducible synthetic examples rather than cryptographic entropy.
Generate independent uniform nonzero octets in 1..255 for a bounded padding test block; not a security protocol or cryptographic padding guarantee.
When to use this tool
Use this tool to generate independent uniform nonzero octets in 1..255 for a bounded padding test block; not a security protocol or cryptographic padding guarantee.
How to use the tool and how it works
- Enter count, seed using the definitions below.
- Run the operation. Resolve input-format errors before interpreting an output.
- Read result.seed, result.bytes, using the stated boundary, ordering, sign and absence conventions.
Draw count independent uniform integers from 1 through 255 and return them as a byte block; count is 1–128.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| count | Positive number of samples/items to request, within the generator’s eligible-support bounds. | Finite safe integer satisfying the stated bounds. |
| seed | Nonblank replay seed, at most 256 UTF-16 code units; an injected source overrides seeded draws. | Text, at most 8,192 UTF-16 code units; narrower grammar/range rules also apply. |
| Output field | Interpretation |
|---|---|
| result | Object containing the fields below. |
| result.seed | Original supplied seed string; injected-source replay additionally requires that source’s state. |
| result.bytes | Generated/reordered byte values as integers 0–255, with narrower nonzero rules where stated. |
{
"input": {
"count": 3,
"seed": "batch56"
},
"output": {
"result": {
"seed": "batch56",
"bytes": [
163,
252,
252
]
}
}
}Limitations and assumptions
- The bytes deliberately exclude zero. This is synthetic padding data, not cryptographic padding or a secure entropy source.
- A nonblank seed of at most 256 UTF-16 code units is required. With ordinary use the seed initializes one deterministic advancing source; an application-injected random source takes precedence and the seed alone then cannot replay the result. Uniformity statements assume independent uniform source draws in [0,1). Source calls are bounded and degenerate injected sources can fail a rejection budget. This is not cryptographically secure.
- Every declared outer field is required and unknown outer fields are rejected. Strings and JSON text have size limits, lists are bounded to 128 entries, and JSON nesting/node counts are bounded. Tighter operation-specific bounds stated above take precedence.
- Ordinary numeric outputs must be finite and within safe-integer magnitude. Exact large lengths/counts use decimal strings. Original record indexes and code-unit positions are zero-based; span ends are exclusive unless stated otherwise.
Alternative or Complementary methods
Choose a generator whose support matches the intended experiment and retain source-position provenance. Use a separate statistically justified process model or cryptographic source where those properties matter.
References
Similar or alternative tools
- Random Block Order Permutation
Uniform whole-block position permutation preserving internal order and duplicate display labels.
- Random Byte Replacement Position
Choose a uniform supplied byte position and a uniform different replacement byte among 255 alternatives; position and replacement both exposed.