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//! OpenPGP data types and associated machinery.
//!
//! This crate aims to provide a complete implementation of OpenPGP as
//! defined by [RFC 4880] as well as some extensions (e.g., [RFC
//! 6637], which describes ECC cryptography for OpenPGP. This
//! includes support for unbuffered message processing.
//!
//! A few features that the OpenPGP community considers to be
//! deprecated (e.g., version 3 compatibility) have been left out. We
//! have also updated some OpenPGP defaults to avoid foot guns (e.g.,
//! we selected modern algorithm defaults). If some functionality is
//! missing, please file a bug report.
//!
//! A non-goal of this crate is support for any sort of high-level,
//! bolted-on functionality. For instance, [RFC 4880] does not define
//! trust models, such as the web of trust, direct trust, or TOFU.
//! Neither does this crate. [RFC 4880] does provide some mechanisms
//! for creating trust models (specifically, UserID certifications),
//! and this crate does expose those mechanisms.
//!
//! We also try hard to avoid dictating how OpenPGP should be used.
//! This doesn't mean that we don't have opinions about how OpenPGP
//! should be used in a number of common scenarios (for instance,
//! message validation). But, in this crate, we refrain from
//! expressing those opinions; we expose an opinionated, high-level
//! interface in the [sequoia-core] and related crates. In our
//! opinion, you should generally use those crates instead of this
//! one.
//!
//! [RFC 4880]: https://tools.ietf.org/html/rfc4880
//! [RFC 6637]: https://tools.ietf.org/html/rfc6637
//! [sequoia-core]: ../sequoia_core
//!
//! # Experimental Features
//!
//! This crate implements functionality from [RFC 4880bis], notably
//! AEAD encryption containers. As of this writing, this RFC is still
//! a draft and the syntax or semantic defined in it may change or go
//! away. Therefore, all related functionality may change and
//! artifacts created using this functionality may not be usable in
//! the future. Do not use it for things other than experiments.
//!
//! [RFC 4880bis]: https://tools.ietf.org/html/draft-ietf-openpgp-rfc4880bis-08
#![warn(missing_docs)]
#[cfg(test)]
#[macro_use]
extern crate quickcheck;
#[macro_use]
extern crate lazy_static;
#[macro_use]
mod macros;
#[cfg(not(feature = "crypto-nettle"))]
compile_error!("Sequoia currently requires the Nettle cryptographic library for now");
// On debug builds, Vec<u8>::truncate is very, very slow. For
// instance, running the decrypt_test_stream test takes 51 seconds on
// my (Neal's) computer using Vec<u8>::truncate and <0.1 seconds using
// `unsafe { v.set_len(len); }`.
//
// The issue is that the compiler calls drop on every element that is
// dropped, even though a u8 doesn't have a drop implementation. The
// compiler optimizes this away at high optimization levels, but those
// levels make debugging harder.
fn vec_truncate(v: &mut Vec<u8>, len: usize) {
if cfg!(debug_assertions) {
if len < v.len() {
unsafe { v.set_len(len); }
}
} else {
v.truncate(len);
}
}
/// Like `drop(Vec<u8>::drain(..prefix_len))`, but fast in debug
/// builds.
fn vec_drain_prefix(v: &mut Vec<u8>, prefix_len: usize) {
if cfg!(debug_assertions) {
// Panic like v.drain(..prefix_len).
assert!(prefix_len <= v.len(), "prefix len {} > vector len {}",
prefix_len, v.len());
let new_len = v.len() - prefix_len;
unsafe {
std::ptr::copy(v[prefix_len..].as_ptr(),
v[..].as_mut_ptr(),
new_len);
}
vec_truncate(v, new_len);
} else {
v.drain(..prefix_len);
}
}
// Like assert!, but checks a pattern.
//
// assert_match!(Some(_) = x);
//
// Note: For modules to see this macro, we need to define it before we
// declare the modules.
#[allow(unused_macros)]
macro_rules! assert_match {
( $error: pat = $expr:expr, $fmt:expr, $($pargs:expr),* ) => {{
let x = $expr;
if let $error = x {
/* Pass. */
} else {
let extra = format!($fmt, $($pargs),*);
panic!("Expected {}, got {:?}{}{}",
stringify!($error), x,
if $fmt.len() > 0 { ": " } else { "." }, extra);
}
}};
( $error: pat = $expr: expr, $fmt:expr ) => {
assert_match!($error = $expr, $fmt, );
};
( $error: pat = $expr: expr ) => {
assert_match!($error = $expr, "");
};
}
#[macro_use]
pub mod armor;
pub mod fmt;
pub mod crypto;
pub mod packet;
pub use packet::Packet;
use crate::packet::key;
pub mod parse;
pub mod cert;
pub use cert::Cert;
pub mod serialize;
mod packet_pile;
pub use packet_pile::PacketPile;
pub mod message;
pub use message::Message;
pub mod types;
use crate::types::{
PublicKeyAlgorithm,
SymmetricAlgorithm,
HashAlgorithm,
SignatureType,
};
mod fingerprint;
pub use fingerprint::Fingerprint;
mod keyid;
pub use keyid::KeyID;
mod keyhandle;
pub use keyhandle::KeyHandle;
pub mod policy;
pub(crate) mod utils;
#[cfg(test)]
mod tests;
/// Returns a timestamp for the tests.
///
/// The time is chosen to that the subkeys in
/// openpgp/tests/data/keys/neal.pgp are not expired.
#[cfg(test)]
fn frozen_time() -> std::time::SystemTime {
crate::types::Timestamp::from(1554542220 - 1).into()
}
/// The version of this crate.
pub const VERSION: &'static str = env!("CARGO_PKG_VERSION");
/// Crate result specialization.
pub type Result<T> = ::std::result::Result<T, anyhow::Error>;
/// Errors used in this crate.
///
/// Note: This enum cannot be exhaustively matched to allow future
/// extensions.
#[derive(thiserror::Error, Debug, Clone, PartialEq, Eq)]
pub enum Error {
/// Invalid argument.
#[error("Invalid argument: {0}")]
InvalidArgument(String),
/// Invalid operation.
#[error("Invalid operation: {0}")]
InvalidOperation(String),
/// A malformed packet.
#[error("Malformed packet: {0}")]
MalformedPacket(String),
/// Packet size exceeds the configured limit.
#[error("{} Packet ({} bytes) exceeds limit of {} bytes",
_0, _1, _2)]
PacketTooLarge(packet::Tag, u32, u32),
/// Unsupported packet type.
#[error("Unsupported packet type. Tag: {0}")]
UnsupportedPacketType(packet::Tag),
/// Unsupported hash algorithm identifier.
#[error("Unsupported hash algorithm: {0}")]
UnsupportedHashAlgorithm(HashAlgorithm),
/// Unsupported public key algorithm identifier.
#[error("Unsupported public key algorithm: {0}")]
UnsupportedPublicKeyAlgorithm(PublicKeyAlgorithm),
/// Unsupported elliptic curve ASN.1 OID.
#[error("Unsupported elliptic curve: {0}")]
UnsupportedEllipticCurve(types::Curve),
/// Unsupported symmetric key algorithm.
#[error("Unsupported symmetric algorithm: {0}")]
UnsupportedSymmetricAlgorithm(SymmetricAlgorithm),
/// Unsupported AEAD algorithm.
#[error("Unsupported AEAD algorithm: {0}")]
UnsupportedAEADAlgorithm(types::AEADAlgorithm),
/// Unsupported Compression algorithm.
#[error("Unsupported Compression algorithm: {0}")]
UnsupportedCompressionAlgorithm(types::CompressionAlgorithm),
/// Unsupported signature type.
#[error("Unsupported signature type: {0}")]
UnsupportedSignatureType(SignatureType),
/// Invalid password.
#[error("Invalid password")]
InvalidPassword,
/// Invalid session key.
#[error("Invalid session key: {0}")]
InvalidSessionKey(String),
/// Missing session key.
#[error("Missing session key: {0}")]
MissingSessionKey(String),
/// Malformed MPI.
#[error("Malformed MPI: {0}")]
MalformedMPI(String),
/// Bad signature.
#[error("Bad signature: {0}")]
BadSignature(String),
/// Message has been manipulated.
#[error("Message has been manipulated")]
ManipulatedMessage,
/// Malformed message.
#[error("Malformed Message: {0}")]
MalformedMessage(String),
/// Malformed certificate.
#[error("Malformed Cert: {0}")]
MalformedCert(String),
/// Unsupported Cert.
///
/// This usually occurs, because the primary key is in an
/// unsupported format. In particular, Sequoia does not support
/// version 3 keys.
#[error("Unsupported Cert: {0}")]
UnsupportedCert(String),
/// Index out of range.
#[error("Index out of range")]
IndexOutOfRange,
/// Expired.
#[error("Expired on {}", crate::fmt::time(.0))]
Expired(std::time::SystemTime),
/// Not yet live.
#[error("Not live until {}", crate::fmt::time(.0))]
NotYetLive(std::time::SystemTime),
/// No binding signature.
#[error("No binding signature at time {}", crate::fmt::time(.0))]
NoBindingSignature(std::time::SystemTime),
/// Invalid key.
#[error("Invalid key: {0:?}")]
InvalidKey(String),
/// The operation is not allowed, because it violates the policy.
///
/// The optional time is the time at which the operation was
/// determined to no longer be secure.
#[error("{0} is not considered secure{}",
.1.as_ref().map(|t| format!(" since {}", crate::fmt::time(t)))
.unwrap_or("".into()))]
PolicyViolation(String, Option<std::time::SystemTime>),
/// This marks this enum as non-exhaustive. Do not use this
/// variant.
#[doc(hidden)] #[error("__Nonexhaustive")] __Nonexhaustive,
}
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