# prng-kt

`prng-kt` is a Kotlin Multiplatform library that provides common pseudorandom number generators.

Supported PRNGs:
- LCG

Supported CSPRNGs:
- HMAC DRBG

## Targets

| Target           | Status        |
|------------------|---------------|
| JVM              | Supported     |
| JavaScript       | Supported     |
| Native (Linux)   | Supported     |
| Native (Windows) | Not Supported |

## Installation

Add the following to your `build.gradle.kts`.

```kotlin
repositories {
    maven("https://git.infendro.com/api/packages/Infendro/maven")
}

dependencies {
    implementation("com.infendro:prng:1.2.0")
}
```

## Usage

```kotlin
import com.infendro.hash.sha2.`SHA-256`
import com.infendro.random.csprng.CSPRNG

fun main() {
    // create a PRNG instance
    val rng = CSPRNG.HMAC(`SHA-256`)

    // seed the PRNG to receive predictable results
    rng.seed(/* some seed */)
    val a = rng.nextInt()
    val b = rng.nextInt()
    val c = rng.nextInt()

    // reseed the PRNG to add entropy to the following results
    rng.reseed(/* some random entropy */)
    val d = rng.nextInt()
    val e = rng.nextInt()
    val f = rng.nextInt()

    // each run:
    // a, b, and c will be predictable
    // d, e, and f will be random (assuming the entropy is also random)
}
```