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{"files":{".cargo_vcs_info.json":"0cbb607c92cdc7920b56befbb8eb96f741a36241f03d7f9d37c8b1dd8b9ce187","CHANGELOG.md":"9b29dc390134f5d026e29311a862559c003a5363541a674ef00e884832fc165a","Cargo.toml":"62bd1d0d66663a600c785b814f57cdf4930b95ae58df19019cc1b3886ea74453","Cargo.toml.orig":"66c14cae30e38ac9ce991c4e7c1ae50bafbf921f2d272ec60833f73bf5f56e75","LICENSE-APACHE":"cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30","LICENSE-MIT":"1264c45618bccf48df48b9e9beefdc704dc094ddedccf5ddef0243a031b9e114","README.md":"1bae85f14381957680b1b3c3849fedf21fa28def929ea6008bb19d55163618dd","src/lib.rs":"51227abd342005b263a7bef2dd21ea0fcfe677db0242be116ed3c1bb59c8baa4"},"package":"e891af845473308773346dc847b2c23ee78fe442e0472ac50e22a18a93d3ae5a"}

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{
"git": {
"sha1": "70eaa76ea3f4bacd67f3027c4a52948485a67d32"
},
"path_in_vcs": "secrecy"
}

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# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## 0.10.3 (2024-10-09)
### Added
- Make integer primitive `SecretSlice`s cloneable ([#1236])
- Impl `From<&str>` for `SecretString` ([#1237])
[#1236]: https://github.com/iqlusioninc/crates/pull/1236
[#1237]: https://github.com/iqlusioninc/crates/pull/1237
## 0.10.2 (2024-09-20)
### Added
- Impl `Deserialize` for `SecretString` ([#1220])
[#1220]: https://github.com/iqlusioninc/crates/pull/1220
## 0.10.1 (2024-09-18)
### Added
- Impl `Clone` for `SecretString` ([#1217])
[#1217]: https://github.com/iqlusioninc/crates/pull/1217
## 0.10.0 (2024-09-17)
This release represents a significant redesign of the `secrecy` crate. We will update this section
with upgrade instructions based on feedback from people upgrading, as it's been a long time since
the previous release, and this release includes a number of breaking changes.
The most notable change is the generic `Secret<T>` type has been removed: instead use `SecretBox<T>`
which stores secrets on the heap instead of the stack. Many of the other changes fall out of this
change and things which were previously type aliases of `Secret<T>` are now type aliases of
`SecretBox<T>`.
This unfortunately means this crate no longer has support for "heapless" `no_std` targets. We don't
have a good solution for these targets, which was a motivation for this change in the first place.
### Added
- `SecretBox::{init_with, try_init_with}` ([#1212])
- `SecretBox::init_with_mut` ([#1213])
- `?Sized` bounds for `SecretBox` ([#1213])
- `SecretSlice<T>` ([#1214])
### Changed
- Rust 2021 edition upgrade ([#889])
- MSRV 1.60 ([#1105])
- `SecretBox<T>` is now a newtype rather than a type alias of `Secret<Box<T>> ([#1140])
- `SecretString` is now a type alias for `SecretBox<str>` ([#1213])
- Disable `serde` default features ([#1194])
### Removed
- `alloc` feature: now a hard dependency ([#1140])
- `bytes` crate integration: no replacement ([#1140])
- `DebugSecret` trait: no replacement ([#1140])
- `Secret<T>`: use `SecretBox<T>` instead ([#1140])
[#889]: https://github.com/iqlusioninc/crates/pull/889
[#1105]: https://github.com/iqlusioninc/crates/pull/1105
[#1140]: https://github.com/iqlusioninc/crates/pull/1140
[#1194]: https://github.com/iqlusioninc/crates/pull/1194
[#1212]: https://github.com/iqlusioninc/crates/pull/1212
[#1213]: https://github.com/iqlusioninc/crates/pull/1213
[#1214]: https://github.com/iqlusioninc/crates/pull/1214
## 0.9.0 (Skipped)
## 0.8.0 (2021-07-18)
NOTE: This release includes an MSRV bump to Rust 1.56. Please use `secrecy = "0.7.0"`
if you would like to support older Rust versions.
### Added
- impl `From<T>` for `Secret` ([#482])
### Changed
- Bump `bytes` to v1.0 ([#592])
- Switch to `resolver = "2"`; MSRV 1.56 ([#755])
[#482]: https://github.com/iqlusioninc/crates/pull/482
[#592]: https://github.com/iqlusioninc/crates/pull/592
[#755]: https://github.com/iqlusioninc/crates/pull/755
## 0.7.0 (2020-07-08)
### Added
- Re-export zeroize ([#466])
- `rustdoc` improvements ([#464], [#465])
### Changed
- Have `DebugSecret` take a formatter ([#467])
- Make `FromStr` impl for `SecretString` be `Infallible` ([#323])
### Fixed
- Use `SerializableSecret` in `Serialize` bounds ([#463])
[#467]: https://github.com/iqlusioninc/crates/pull/467
[#466]: https://github.com/iqlusioninc/crates/pull/466
[#465]: https://github.com/iqlusioninc/crates/pull/465
[#464]: https://github.com/iqlusioninc/crates/pull/464
[#463]: https://github.com/iqlusioninc/crates/pull/463
[#323]: https://github.com/iqlusioninc/crates/pull/323
## 0.6.0 (2019-12-12)
- Impl `CloneableSecret` for `Secret<[T; N]>` where `T: Clone` ([#311])
- Impl `DebugSecret` for `[T; N]` where `N` <= 64 ([#310])
- Impl `FromStr` for `SecretString` ([#309])
- Upgrade to `bytes` v0.5 ([#301], [#308], [#312])
[#312]: https://github.com/iqlusioninc/crates/pull/312
[#311]: https://github.com/iqlusioninc/crates/pull/311
[#310]: https://github.com/iqlusioninc/crates/pull/310
[#309]: https://github.com/iqlusioninc/crates/pull/309
[#308]: https://github.com/iqlusioninc/crates/pull/308
[#301]: https://github.com/iqlusioninc/crates/pull/301
## 0.5.2 (2019-12-18)
- Backport Impl `FromStr` for `SecretString` ([#309])
[#309]: https://github.com/iqlusioninc/crates/pull/309
## 0.5.1 (2019-11-30)
- Change default `DebugSecret` string to `[REDACTED]` ([#290])
[#290]: https://github.com/iqlusioninc/crates/pull/290
## 0.5.0 (2019-10-13)
- Upgrade to `zeroize` v1.0.0 ([#279])
[#279]: https://github.com/iqlusioninc/crates/pull/279
## 0.4.1 (2019-10-13)
- Upgrade to `zeroize` v1.0.0-pre ([#268])
[#268]: https://github.com/iqlusioninc/crates/pull/268
## 0.4.0 (2019-09-03)
- Add `SerializableSecret` ([#262])
- Add (optional) concrete `SecretBytes` type ([#258], [#259], [#260], [#261])
[#262]: https://github.com/iqlusioninc/crates/pull/262
[#261]: https://github.com/iqlusioninc/crates/pull/261
[#260]: https://github.com/iqlusioninc/crates/pull/260
[#259]: https://github.com/iqlusioninc/crates/pull/259
[#258]: https://github.com/iqlusioninc/crates/pull/258
## 0.3.1 (2019-08-26)
- Impl `CloneableSecret` for `String` ([#256])
[#256]: https://github.com/iqlusioninc/crates/pull/256
## 0.3.0 (2019-08-20)
- Add support for `alloc` types ([#253])
- `zeroize` v0.10.0 ([#248])
- Add a default impl for `DebugSecret` trait ([#241])
[#253]: https://github.com/iqlusioninc/crates/pull/253
[#248]: https://github.com/iqlusioninc/crates/pull/248
[#241]: https://github.com/iqlusioninc/crates/pull/241
## 0.2.2 (2019-06-28)
- README.md: add Gitter badges; update image links ([#221])
[#221]: https://github.com/iqlusioninc/crates/pull/221
## 0.2.1 (2019-06-04)
- `zeroize` v0.9.0 ([#215])
[#215]: https://github.com/iqlusioninc/crates/pull/215
## 0.2.0 (2019-05-29)
- Add `CloneableSecret` marker trait ([#210])
[#210]: https://github.com/iqlusioninc/crates/pull/210
## 0.1.0 (2019-05-23)
- Initial release

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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
edition = "2021"
rust-version = "1.60"
name = "secrecy"
version = "0.10.3"
authors = ["Tony Arcieri <tony@iqlusion.io>"]
build = false
autobins = false
autoexamples = false
autotests = false
autobenches = false
description = """
Wrapper types and traits for secret management which help ensure
they aren't accidentally copied, logged, or otherwise exposed
(as much as possible), and also ensure secrets are securely wiped
from memory when dropped.
"""
homepage = "https://github.com/iqlusioninc/crates/"
readme = "README.md"
keywords = [
"clear",
"memory",
"secret",
"secure",
"wipe",
]
categories = [
"cryptography",
"memory-management",
"no-std",
"os",
]
license = "Apache-2.0 OR MIT"
repository = "https://github.com/iqlusioninc/crates/tree/main/secrecy"
[package.metadata.docs.rs]
all-features = true
rustdoc-args = [
"--cfg",
"docsrs",
]
[lib]
name = "secrecy"
path = "src/lib.rs"
[dependencies.serde]
version = "1"
features = ["alloc"]
optional = true
default-features = false
[dependencies.zeroize]
version = "1.6"
features = ["alloc"]
default-features = false

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MIT License
Copyright (c) 2019-2024 iqlusion
Permission is hereby granted, free of charge, to any person obtaining a copy
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# secrecy.rs 🤐 <a href="https://www.iqlusion.io"><img src="https://storage.googleapis.com/iqlusion-production-web/img/logo/iqlusion-rings-sm.png" alt="iqlusion" width="24" height="24"></a>
[![Crate][crate-image]][crate-link]
[![Docs][docs-image]][docs-link]
![Apache 2.0/MIT Licensed][license-image]
![MSRV][rustc-image]
[![Safety Dance][safety-image]][safety-link]
[![Build Status][build-image]][build-link]
A simple secret-keeping library for Rust.
[Documentation][docs-link]
## About
**secrecy** is a *simple*, safe (i.e. `forbid(unsafe_code)` library which
provides wrapper types and traits for secret management in Rust, namely the
`Secret<T>` type for wrapping another value in a "secret cell" which attempts
to limit exposure (only available through a special `ExposeSecret` trait).
This helps to ensure secrets aren't accidentally copied, logged, or otherwise
exposed (as much as possible), and also ensures secrets are securely wiped
from memory when dropped.
## Minimum Supported Rust Version
Rust **1.60** or newer.
In the future, we reserve the right to change MSRV (i.e. MSRV is out-of-scope
for this crate's SemVer guarantees), however when we do it will be accompanied by
a minor version bump.
## serde support
Optional `serde` support for parsing owned secret values is available, gated
under the `serde` cargo feature.
It uses the `Deserialize` and `DeserializeOwned` traits to implement
deserializing secret types which also impl these traits.
This doesn't guarantee `serde` (or code providing input to `serde`) won't
accidentally make additional copies of the secret, but does the best it can
with what it is given and tries to minimize risk of exposure as much as
possible.
## License
Copyright © 2019-2024 iqlusion
**secrecy** is distributed under the terms of either the MIT license
or the Apache License (Version 2.0), at your option.
See [LICENSE] (Apache License, Version 2.0) file in the `iqlusioninc/crates`
toplevel directory of this repository or [LICENSE-MIT] for details.
## Contribution
Unless you explicitly state otherwise, any contribution intentionally
submitted for inclusion in the work by you shall be dual licensed as above,
without any additional terms or conditions.
[//]: # (badges)
[crate-image]: https://img.shields.io/crates/v/secrecy.svg?logo=rust
[crate-link]: https://crates.io/crates/secrecy
[docs-image]: https://docs.rs/secrecy/badge.svg
[docs-link]: https://docs.rs/secrecy/
[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
[rustc-image]: https://img.shields.io/badge/rustc-1.60+-blue.svg
[safety-image]: https://img.shields.io/badge/unsafe-forbidden-success.svg
[safety-link]: https://github.com/rust-secure-code/safety-dance/
[build-image]: https://github.com/iqlusioninc/crates/actions/workflows/secrecy.yml/badge.svg
[build-link]: https://github.com/iqlusioninc/crates/actions/workflows/secrecy.yml
[//]: # (general links)
[LICENSE]: https://github.com/iqlusioninc/crates/blob/main/LICENSE
[LICENSE-MIT]: https://github.com/iqlusioninc/crates/blob/main/secrecy/LICENSE-MIT

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//! [`SecretBox`] wrapper type for more carefully handling secret values
//! (e.g. passwords, cryptographic keys, access tokens or other credentials)
//!
//! # Goals
//!
//! - Make secret access explicit and easy-to-audit via the
//! [`ExposeSecret`] and [`ExposeSecretMut`] traits.
//! - Prevent accidental leakage of secrets via channels like debug logging
//! - Ensure secrets are wiped from memory on drop securely
//! (using the [`zeroize`] crate)
//!
//! Presently this crate favors a simple, `no_std`-friendly, safe i.e.
//! `forbid(unsafe_code)`-based implementation and does not provide more advanced
//! memory protection mechanisms e.g. ones based on `mlock(2)`/`mprotect(2)`.
//! We may explore more advanced protection mechanisms in the future.
//! Those who don't mind `std` and `libc` dependencies should consider using
//! the [`secrets`](https://crates.io/crates/secrets) crate.
//!
//! # `serde` support
//!
//! When the `serde` feature of this crate is enabled, the [`SecretBox`] type will
//! receive a [`Deserialize`] impl for all `SecretBox<T>` types where
//! `T: DeserializeOwned`. This allows *loading* secret values from data
//! deserialized from `serde` (be careful to clean up any intermediate secrets
//! when doing this, e.g. the unparsed input!)
//!
//! To prevent exfiltration of secret values via `serde`, by default `SecretBox<T>`
//! does *not* receive a corresponding [`Serialize`] impl. If you would like
//! types of `SecretBox<T>` to be serializable with `serde`, you will need to impl
//! the [`SerializableSecret`] marker trait on `T`.
#![no_std]
#![cfg_attr(docsrs, feature(doc_auto_cfg))]
#![forbid(unsafe_code)]
#![warn(missing_docs, rust_2018_idioms, unused_qualifications)]
extern crate alloc;
use alloc::{boxed::Box, string::String, vec::Vec};
use core::{
any,
fmt::{self, Debug},
};
use zeroize::{Zeroize, ZeroizeOnDrop};
#[cfg(feature = "serde")]
use serde::{de, ser, Deserialize, Serialize};
pub use zeroize;
/// Wrapper type for values that contains secrets, which attempts to limit
/// accidental exposure and ensure secrets are wiped from memory when dropped.
/// (e.g. passwords, cryptographic keys, access tokens or other credentials)
///
/// Access to the secret inner value occurs through the [`ExposeSecret`]
/// or [`ExposeSecretMut`] traits, which provide methods for accessing the inner secret value.
pub struct SecretBox<S: Zeroize + ?Sized> {
inner_secret: Box<S>,
}
impl<S: Zeroize + ?Sized> Zeroize for SecretBox<S> {
fn zeroize(&mut self) {
self.inner_secret.as_mut().zeroize()
}
}
impl<S: Zeroize + ?Sized> Drop for SecretBox<S> {
fn drop(&mut self) {
self.zeroize()
}
}
impl<S: Zeroize + ?Sized> ZeroizeOnDrop for SecretBox<S> {}
impl<S: Zeroize + ?Sized> From<Box<S>> for SecretBox<S> {
fn from(source: Box<S>) -> Self {
Self::new(source)
}
}
impl<S: Zeroize + ?Sized> SecretBox<S> {
/// Create a secret value using a pre-boxed value.
pub fn new(boxed_secret: Box<S>) -> Self {
Self {
inner_secret: boxed_secret,
}
}
}
impl<S: Zeroize + Default> SecretBox<S> {
/// Create a secret value using a function that can initialize the value in-place.
pub fn init_with_mut(ctr: impl FnOnce(&mut S)) -> Self {
let mut secret = Self::default();
ctr(secret.expose_secret_mut());
secret
}
}
impl<S: Zeroize + Clone> SecretBox<S> {
/// Create a secret value using the provided function as a constructor.
///
/// The implementation makes an effort to zeroize the locally constructed value
/// before it is copied to the heap, and constructing it inside the closure minimizes
/// the possibility of it being accidentally copied by other code.
///
/// **Note:** using [`Self::new`] or [`Self::init_with_mut`] is preferable when possible,
/// since this method's safety relies on empiric evidence and may be violated on some targets.
pub fn init_with(ctr: impl FnOnce() -> S) -> Self {
let mut data = ctr();
let secret = Self {
inner_secret: Box::new(data.clone()),
};
data.zeroize();
secret
}
/// Same as [`Self::init_with`], but the constructor can be fallible.
///
///
/// **Note:** using [`Self::new`] or [`Self::init_with_mut`] is preferable when possible,
/// since this method's safety relies on empyric evidence and may be violated on some targets.
pub fn try_init_with<E>(ctr: impl FnOnce() -> Result<S, E>) -> Result<Self, E> {
let mut data = ctr()?;
let secret = Self {
inner_secret: Box::new(data.clone()),
};
data.zeroize();
Ok(secret)
}
}
impl<S: Zeroize + Default> Default for SecretBox<S> {
fn default() -> Self {
Self {
inner_secret: Box::<S>::default(),
}
}
}
impl<S: Zeroize + ?Sized> Debug for SecretBox<S> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "SecretBox<{}>([REDACTED])", any::type_name::<S>())
}
}
impl<S> Clone for SecretBox<S>
where
S: CloneableSecret,
{
fn clone(&self) -> Self {
SecretBox {
inner_secret: self.inner_secret.clone(),
}
}
}
impl<S: Zeroize + ?Sized> ExposeSecret<S> for SecretBox<S> {
fn expose_secret(&self) -> &S {
self.inner_secret.as_ref()
}
}
impl<S: Zeroize + ?Sized> ExposeSecretMut<S> for SecretBox<S> {
fn expose_secret_mut(&mut self) -> &mut S {
self.inner_secret.as_mut()
}
}
/// Secret slice type.
///
/// This is a type alias for [`SecretBox<[S]>`] which supports some helpful trait impls.
///
/// Notably it has a [`From<Vec<S>>`] impl which is the preferred method for construction.
pub type SecretSlice<S> = SecretBox<[S]>;
impl<S> From<Vec<S>> for SecretSlice<S>
where
S: Zeroize,
[S]: Zeroize,
{
fn from(vec: Vec<S>) -> Self {
Self::from(vec.into_boxed_slice())
}
}
impl<S> Clone for SecretSlice<S>
where
S: CloneableSecret + Zeroize,
[S]: Zeroize,
{
fn clone(&self) -> Self {
SecretBox {
inner_secret: Vec::from(&*self.inner_secret).into_boxed_slice(),
}
}
}
impl<S> Default for SecretSlice<S>
where
S: Zeroize,
[S]: Zeroize,
{
fn default() -> Self {
Vec::new().into()
}
}
/// Secret string type.
///
/// This is a type alias for [`SecretBox<str>`] which supports some helpful trait impls.
///
/// Notably it has a [`From<String>`] impl which is the preferred method for construction.
pub type SecretString = SecretBox<str>;
impl From<String> for SecretString {
fn from(s: String) -> Self {
Self::from(s.into_boxed_str())
}
}
impl From<&str> for SecretString {
fn from(s: &str) -> Self {
Self::from(String::from(s))
}
}
impl Clone for SecretString {
fn clone(&self) -> Self {
SecretBox {
inner_secret: self.inner_secret.clone(),
}
}
}
impl Default for SecretString {
fn default() -> Self {
String::default().into()
}
}
/// Marker trait for secrets which are allowed to be cloned
pub trait CloneableSecret: Clone + Zeroize {}
// Mark integer primitives as cloneable secrets
impl CloneableSecret for i8 {}
impl CloneableSecret for i16 {}
impl CloneableSecret for i32 {}
impl CloneableSecret for i64 {}
impl CloneableSecret for i128 {}
impl CloneableSecret for isize {}
impl CloneableSecret for u8 {}
impl CloneableSecret for u16 {}
impl CloneableSecret for u32 {}
impl CloneableSecret for u64 {}
impl CloneableSecret for u128 {}
impl CloneableSecret for usize {}
/// Expose a reference to an inner secret
pub trait ExposeSecret<S: ?Sized> {
/// Expose secret: this is the only method providing access to a secret.
fn expose_secret(&self) -> &S;
}
/// Expose a mutable reference to an inner secret
pub trait ExposeSecretMut<S: ?Sized> {
/// Expose secret: this is the only method providing access to a secret.
fn expose_secret_mut(&mut self) -> &mut S;
}
/// Marker trait for secret types which can be [`Serialize`]-d by [`serde`].
///
/// When the `serde` feature of this crate is enabled and types are marked with
/// this trait, they receive a [`Serialize` impl][1] for `SecretBox<T>`.
/// (NOTE: all types which impl `DeserializeOwned` receive a [`Deserialize`]
/// impl)
///
/// This is done deliberately to prevent accidental exfiltration of secrets
/// via `serde` serialization.
///
/// If you really want to have `serde` serialize those types, use the
/// [`serialize_with`][2] attribute to specify a serializer that exposes the secret.
///
/// [1]: https://docs.rs/secrecy/latest/secrecy/struct.Secret.html#implementations
/// [2]: https://serde.rs/field-attrs.html#serialize_with
#[cfg(feature = "serde")]
pub trait SerializableSecret: Serialize {}
#[cfg(feature = "serde")]
impl<'de, T> Deserialize<'de> for SecretBox<T>
where
T: Zeroize + Clone + de::DeserializeOwned + Sized,
{
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: de::Deserializer<'de>,
{
Self::try_init_with(|| T::deserialize(deserializer))
}
}
#[cfg(feature = "serde")]
impl<'de> Deserialize<'de> for SecretString {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: de::Deserializer<'de>,
{
String::deserialize(deserializer).map(Into::into)
}
}
#[cfg(feature = "serde")]
impl<T> Serialize for SecretBox<T>
where
T: Zeroize + SerializableSecret + Serialize + Sized,
{
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: ser::Serializer,
{
self.expose_secret().serialize(serializer)
}
}

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