zeroize 1.9.0: zeroize::Zeroize

# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4

[[package]]
name = "sample-zeroize"
version = "1.0.0"
dependencies = [
 "zeroize",
]

[[package]]
name = "zeroize"
version = "1.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e13c156562582aa81c60cb29407084cdb54c4164760106ab78e6c5b0858cf64e"

[package]
name = "sample-zeroize"
version = "1.0.0"
edition = "2021"
publish = false

[dependencies]
zeroize = "=1.9.0"

[[bin]]
name = "contract"
path = "test/contract.rs"

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify zeroize::Zeroize in pkg:cargo/zeroize@1.9.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/zeroize@1.9.0
Demonstrate these symbols/APIs:
  - zeroize::Zeroize

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:1715a680f2687b98ead71c93e3ef657598a483bf9a53f4a4fce54a94c06ac225","contract":["Zeroize::zeroize clears primitive integer and boolean scalar values to zero","Zeroize::zeroize clears fixed-size byte arrays and mutable slices in place","Zeroize::zeroize clears heap-allocated Vec elements and resets length to zero","Zeroize::zeroize clears String buffer contents and resets length to zero","Zeroize::zeroize clears Option value and transitions instance to None"],"goal":"verify zeroize::Zeroize in pkg:cargo/zeroize@1.9.0","kind":"HOW","packages":["pkg:cargo/zeroize@1.9.0"],"schemaVersion":1,"symbols":["zeroize::Zeroize"]},"contractCommand":["cargo","run","--offline"],"environment":{"arch":"x64","distro":"alpine","ecosystem":"cargo","libc":"musl","os":"linux","packageManager":"cargo","schemaVersion":1},"license":"MIT-0","packages":["pkg:cargo/zeroize@1.9.0"],"schemaVersion":1,"subject":"pkg:cargo/zeroize@1.9.0","symbols":["zeroize::Zeroize"],"verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify zeroize::Zeroize in pkg:cargo/zeroize@1.9.0",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/zeroize@1.9.0"
  ],
  "symbols": [
    "zeroize::Zeroize"
  ]
}

//! Clean-room verification sample for zeroize.

pub use zeroize::*;

use zeroize::Zeroize;

fn main() {
    // 1. Zeroize::zeroize clears primitive integer and boolean scalar values to zero
    let mut val_u64: u64 = 0xdeadbeefcafebabe;
    val_u64.zeroize();
    assert_eq!(val_u64, 0);

    let mut val_bool: bool = true;
    val_bool.zeroize();
    assert_eq!(val_bool, false);

    // 2. Zeroize::zeroize clears fixed-size byte arrays and mutable slices in place
    let mut arr = [42u8; 32];
    arr.zeroize();
    assert_eq!(arr, [0u8; 32]);

    let mut slice_data = [99u8; 8];
    slice_data.as_mut_slice().zeroize();
    assert_eq!(slice_data, [0u8; 8]);

    // 3. Zeroize::zeroize clears heap-allocated Vec elements and resets length to zero
    let mut vec = vec![10u8, 20, 30, 40, 50];
    vec.zeroize();
    assert_eq!(vec.len(), 0);
    assert!(vec.capacity() >= 5);

    // 4. Zeroize::zeroize clears String buffer contents and resets length to zero
    let mut s = String::from("top-secret-passphrase");
    s.zeroize();
    assert_eq!(s.len(), 0);
    assert!(s.capacity() >= 21);

    // 5. Zeroize::zeroize clears Option value and transitions instance to None
    let mut opt_some: Option<u32> = Some(12345);
    opt_some.zeroize();
    assert_eq!(opt_some, None);

    println!("All zeroize::Zeroize contract assertions passed successfully.");
}