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#![no_std]
#![cfg_attr(docsrs, feature(doc_cfg))]
#![doc(
html_logo_url = "https://raw.githubusercontent.com/RustCrypto/meta/master/logo.svg",
html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/meta/master/logo.svg",
html_root_url = "https://docs.rs/pkcs5/0.2.0"
)]
#![forbid(unsafe_code)]
#![warn(missing_docs, rust_2018_idioms, unused_qualifications)]
#[cfg(all(feature = "alloc", feature = "pbes2"))]
extern crate alloc;
pub mod pbes1;
pub mod pbes2;
pub use der::{self, Error, ObjectIdentifier};
pub use spki::AlgorithmIdentifier;
use core::{
convert::{TryFrom, TryInto},
fmt,
};
use der::{message, Any, Encodable, Encoder, Length};
#[cfg(all(feature = "alloc", feature = "pbes2"))]
use alloc::vec::Vec;
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub struct CryptoError;
impl fmt::Display for CryptoError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("PKCS#5 cryptographic error")
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
#[non_exhaustive]
#[allow(clippy::large_enum_variant)]
pub enum EncryptionScheme<'a> {
Pbes1(pbes1::Parameters),
Pbes2(pbes2::Parameters<'a>),
}
impl<'a> EncryptionScheme<'a> {
#[cfg(all(feature = "alloc", feature = "pbes2"))]
#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
#[cfg_attr(docsrs, doc(cfg(feature = "pbes2")))]
pub fn decrypt(
&self,
password: impl AsRef<[u8]>,
ciphertext: &[u8],
) -> Result<Vec<u8>, CryptoError> {
match self {
Self::Pbes2(params) => params.decrypt(password, ciphertext),
_ => Err(CryptoError),
}
}
#[cfg(feature = "pbes2")]
#[cfg_attr(docsrs, doc(cfg(feature = "pbes2")))]
pub fn decrypt_in_place<'b>(
&self,
password: impl AsRef<[u8]>,
buffer: &'b mut [u8],
) -> Result<&'b [u8], CryptoError> {
match self {
Self::Pbes2(params) => params.decrypt_in_place(password, buffer),
_ => Err(CryptoError),
}
}
#[cfg(all(feature = "alloc", feature = "pbes2"))]
#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
#[cfg_attr(docsrs, doc(cfg(feature = "pbes2")))]
pub fn encrypt(
&self,
password: impl AsRef<[u8]>,
plaintext: &[u8],
) -> Result<Vec<u8>, CryptoError> {
match self {
Self::Pbes2(params) => params.encrypt(password, plaintext),
_ => Err(CryptoError),
}
}
#[cfg(feature = "pbes2")]
#[cfg_attr(docsrs, doc(cfg(feature = "pbes2")))]
pub fn encrypt_in_place<'b>(
&self,
password: impl AsRef<[u8]>,
buffer: &'b mut [u8],
pos: usize,
) -> Result<&'b [u8], CryptoError> {
match self {
Self::Pbes2(params) => params.encrypt_in_place(password, buffer, pos),
_ => Err(CryptoError),
}
}
pub fn oid(&self) -> ObjectIdentifier {
match self {
Self::Pbes1(params) => params.oid(),
Self::Pbes2(_) => pbes2::PBES2_OID,
}
}
pub fn pbes1(&self) -> Option<&pbes1::Parameters> {
match self {
Self::Pbes1(params) => Some(params),
_ => None,
}
}
pub fn pbes2(&self) -> Option<&pbes2::Parameters<'a>> {
match self {
Self::Pbes2(params) => Some(params),
_ => None,
}
}
}
impl<'a> TryFrom<&'a [u8]> for EncryptionScheme<'a> {
type Error = Error;
fn try_from(bytes: &'a [u8]) -> der::Result<EncryptionScheme<'a>> {
AlgorithmIdentifier::try_from(bytes).and_then(TryInto::try_into)
}
}
impl<'a> TryFrom<Any<'a>> for EncryptionScheme<'a> {
type Error = Error;
fn try_from(any: Any<'a>) -> der::Result<EncryptionScheme<'a>> {
AlgorithmIdentifier::try_from(any).and_then(TryInto::try_into)
}
}
impl<'a> TryFrom<AlgorithmIdentifier<'a>> for EncryptionScheme<'a> {
type Error = Error;
fn try_from(alg: AlgorithmIdentifier<'a>) -> der::Result<EncryptionScheme<'_>> {
match alg.oid {
pbes2::PBES2_OID => pbes2::Parameters::try_from(alg.parameters_any()?).map(Into::into),
_ => pbes1::Parameters::try_from(alg).map(Into::into),
}
}
}
impl<'a> From<pbes1::Parameters> for EncryptionScheme<'a> {
fn from(params: pbes1::Parameters) -> EncryptionScheme<'a> {
Self::Pbes1(params)
}
}
impl<'a> From<pbes2::Parameters<'a>> for EncryptionScheme<'a> {
fn from(params: pbes2::Parameters<'a>) -> EncryptionScheme<'a> {
Self::Pbes2(params)
}
}
impl<'a> Encodable for EncryptionScheme<'a> {
fn encoded_len(&self) -> der::Result<Length> {
match self {
Self::Pbes1(pbes1) => pbes1.encoded_len(),
Self::Pbes2(pbes2) => message::encoded_len(&[&pbes2::PBES2_OID, pbes2]),
}
}
fn encode(&self, encoder: &mut Encoder<'_>) -> der::Result<()> {
match self {
Self::Pbes1(pbes1) => pbes1.encode(encoder),
Self::Pbes2(pbes2) => encoder.message(&[&pbes2::PBES2_OID, pbes2]),
}
}
}