// Copyright 2015 Brian Smith.

//

// Permission to use, copy, modify, and/or distribute this software for any

// purpose with or without fee is hereby granted, provided that the above

// copyright notice and this permission notice appear in all copies.

//

// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES

// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR

// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

//! webpki: Web PKI X.509 Certificate Validation.

//!

//! See `EndEntityCert`'s documentation for a description of the certificate

//! processing steps necessary for a TLS connection.

//!

//! # Features

//!

//! | Feature | Description |

//! | ------- | ----------- |

//! | `alloc` | Enable features that require use of the heap. Currently all RSA signature algorithms require this feature. |

//! | `std` | Enable features that require libstd. Implies `alloc`. |

//! | `ring` | Enable use of the *ring* crate for cryptography. |

//! | `aws_lc_rs` | Enable use of the aws-lc-rs crate for cryptography. |

#![no_std]

#![warn(elided_lifetimes_in_paths, unreachable_pub, clippy::use_self)]

#![deny(missing_docs, clippy::as_conversions)]

#![allow(

    clippy::len_without_is_empty,

    clippy::new_without_default,

    clippy::single_match,

    clippy::single_match_else,

    clippy::type_complexity,

    clippy::upper_case_acronyms

)]

// Enable documentation for all features on docs.rs

#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]

#[cfg(any(feature = "std", test))]

extern crate std;

#[cfg(any(test, feature = "alloc"))]

#[cfg_attr(test, macro_use)]

extern crate alloc;

#[macro_use]

mod der;

#[cfg(feature = "aws_lc_rs")]

mod aws_lc_rs_algs;

mod cert;

mod end_entity;

mod error;

#[cfg(feature = "ring")]

mod ring_algs;

mod rpk_entity;

mod signed_data;

mod subject_name;

mod time;

mod trust_anchor;

mod crl;

mod verify_cert;

mod x509;

#[cfg(test)]

pub(crate) mod test_utils;

pub use {

    cert::Cert,

    crl::{

        BorrowedCertRevocationList, BorrowedRevokedCert, CertRevocationList, ExpirationPolicy,

        RevocationCheckDepth, RevocationOptions, RevocationOptionsBuilder, RevocationReason,

        UnknownStatusPolicy,

    },

    end_entity::EndEntityCert,

    error::{DerTypeId, Error},

    rpk_entity::RawPublicKeyEntity,

    signed_data::alg_id,

    trust_anchor::anchor_from_trusted_cert,

    verify_cert::KeyUsage,

    verify_cert::VerifiedPath,

};

pub use pki_types as types;

#[cfg(feature = "alloc")]

pub use crl::{OwnedCertRevocationList, OwnedRevokedCert};

#[cfg(feature = "ring")]

/// Signature verification algorithm implementations using the *ring* crypto library.

pub mod ring {

    pub use super::ring_algs::{

        ECDSA_P256_SHA256, ECDSA_P256_SHA384, ECDSA_P384_SHA256, ECDSA_P384_SHA384, ED25519,

    };

    #[cfg(feature = "alloc")]

    pub use super::ring_algs::{

        RSA_PKCS1_2048_8192_SHA256, RSA_PKCS1_2048_8192_SHA384, RSA_PKCS1_2048_8192_SHA512,

        RSA_PKCS1_3072_8192_SHA384, RSA_PSS_2048_8192_SHA256_LEGACY_KEY,

        RSA_PSS_2048_8192_SHA384_LEGACY_KEY, RSA_PSS_2048_8192_SHA512_LEGACY_KEY,

    };

}

#[cfg(feature = "aws_lc_rs")]

/// Signature verification algorithm implementations using the aws-lc-rs crypto library.

pub mod aws_lc_rs {

    pub use super::aws_lc_rs_algs::{

        ECDSA_P256_SHA256, ECDSA_P256_SHA384, ECDSA_P384_SHA256, ECDSA_P384_SHA384,

        ECDSA_P521_SHA256, ECDSA_P521_SHA384, ECDSA_P521_SHA512, ED25519,

        RSA_PKCS1_2048_8192_SHA256, RSA_PKCS1_2048_8192_SHA384, RSA_PKCS1_2048_8192_SHA512,

        RSA_PKCS1_3072_8192_SHA384, RSA_PSS_2048_8192_SHA256_LEGACY_KEY,

        RSA_PSS_2048_8192_SHA384_LEGACY_KEY, RSA_PSS_2048_8192_SHA512_LEGACY_KEY,

    };

}

/// An array of all the verification algorithms exported by this crate.

///

/// This will be empty if the crate is built without the `ring` and `aws_lc_rs` features.

pub static ALL_VERIFICATION_ALGS: &[&dyn types::SignatureVerificationAlgorithm] = &[

    #[cfg(feature = "ring")]

    ring::ECDSA_P256_SHA256,

    #[cfg(feature = "ring")]

    ring::ECDSA_P256_SHA384,

    #[cfg(feature = "ring")]

    ring::ECDSA_P384_SHA256,

    #[cfg(feature = "ring")]

    ring::ECDSA_P384_SHA384,

    #[cfg(feature = "ring")]

    ring::ED25519,

    #[cfg(all(feature = "ring", feature = "alloc"))]

    ring::RSA_PKCS1_2048_8192_SHA256,

    #[cfg(all(feature = "ring", feature = "alloc"))]

    ring::RSA_PKCS1_2048_8192_SHA384,

    #[cfg(all(feature = "ring", feature = "alloc"))]

    ring::RSA_PKCS1_2048_8192_SHA512,

    #[cfg(all(feature = "ring", feature = "alloc"))]

    ring::RSA_PKCS1_3072_8192_SHA384,

    #[cfg(all(feature = "ring", feature = "alloc"))]

    ring::RSA_PSS_2048_8192_SHA256_LEGACY_KEY,

    #[cfg(all(feature = "ring", feature = "alloc"))]

    ring::RSA_PSS_2048_8192_SHA384_LEGACY_KEY,

    #[cfg(all(feature = "ring", feature = "alloc"))]

    ring::RSA_PSS_2048_8192_SHA512_LEGACY_KEY,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::ECDSA_P256_SHA256,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::ECDSA_P256_SHA384,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::ECDSA_P384_SHA256,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::ECDSA_P384_SHA384,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::ECDSA_P521_SHA256,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::ECDSA_P521_SHA384,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::ECDSA_P521_SHA512,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::ED25519,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::RSA_PKCS1_2048_8192_SHA256,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::RSA_PKCS1_2048_8192_SHA384,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::RSA_PKCS1_2048_8192_SHA512,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::RSA_PKCS1_3072_8192_SHA384,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::RSA_PSS_2048_8192_SHA256_LEGACY_KEY,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::RSA_PSS_2048_8192_SHA384_LEGACY_KEY,

    #[cfg(feature = "aws_lc_rs")]

    aws_lc_rs::RSA_PSS_2048_8192_SHA512_LEGACY_KEY,

];

fn public_values_eq(a: untrusted::Input<'_>, b: untrusted::Input<'_>) -> bool {

    a.as_slice_less_safe() == b.as_slice_less_safe()

}