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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 several extensions (e.g., [RFC
//! 6637], which describes ECC cryptography for OpenPGP, and [RFC
//! 4880bis], the draft of the next OpenPGP standard). 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 as
//! well as support for functionality that we consider to be not only
//! completely useless, but also dangerous (e.g., support for
//! [unhashed signature subpackets]). We have also updated some
//! OpenPGP defaults to avoid foot guns (e.g., this crate does not
//! fallback to IDEA, but instead assumes all OpenPGP implementations
//! understand AES). 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
//! [RFC 4880bis]: https://tools.ietf.org/html/draft-ietf-openpgp-rfc4880bis-05
//! [unhashed signature subpackets]: https://tools.ietf.org/html/rfc4880#section-5.2.3.2
//! [sequoia-core]: ../sequoia_core
#![warn(missing_docs)]
extern crate lalrpop_util;
#[macro_use]
extern crate failure;
extern crate buffered_reader;
extern crate memsec;
extern crate nettle;
#[cfg(feature = "compression-deflate")]
extern crate flate2;
#[cfg(feature = "compression-bzip2")]
extern crate bzip2;
#[cfg(test)]
#[macro_use]
extern crate quickcheck;
#[cfg(not(test))]
extern crate quickcheck;
extern crate rand;
extern crate time;
#[macro_use] extern crate lazy_static;
extern crate idna;
#[macro_use]
mod macros;
// 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 autocrypt;
pub mod conversions;
pub mod crypto;
pub mod packet;
use crate::packet::{Container, key};
pub mod parse;
pub mod tpk;
pub use tpk::TPK;
pub mod serialize;
mod packet_pile;
pub mod message;
pub mod constants;
use crate::constants::{
PublicKeyAlgorithm,
SymmetricAlgorithm,
HashAlgorithm,
SignatureType,
};
mod fingerprint;
mod keyid;
#[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() -> time::Tm {
use crate::conversions::Time;
time::Tm::from_pgp(1554542220 - 1)
}
/// Crate result specialization.
pub type Result<T> = ::std::result::Result<T, failure::Error>;
#[derive(Fail, Debug, Clone)]
/// Errors returned by this module.
pub enum Error {
/// Invalid argument.
#[fail(display = "Invalid argument: {}", _0)]
InvalidArgument(String),
/// Invalid operation.
#[fail(display = "Invalid operation: {}", _0)]
InvalidOperation(String),
/// A malformed packet.
#[fail(display = "Malformed packet: {}", _0)]
MalformedPacket(String),
/// Packet size exceeds the configured limit.
#[fail(display = "{} Packet ({} bytes) exceeds limit of {} bytes",
_0, _1, _2)]
PacketTooLarge(packet::Tag, u32, u32),
/// Unsupported packet type.
#[fail(display = "Unsupported packet type. Tag: {}", _0)]
UnsupportedPacketType(packet::Tag),
/// Unsupported hash algorithm identifier.
#[fail(display = "Unsupported hash algorithm: {}", _0)]
UnsupportedHashAlgorithm(HashAlgorithm),
/// Unsupported public key algorithm identifier.
#[fail(display = "Unsupported public key algorithm: {}", _0)]
UnsupportedPublicKeyAlgorithm(PublicKeyAlgorithm),
/// Unsupported elliptic curve ASN.1 OID.
#[fail(display = "Unsupported elliptic curve: {}", _0)]
UnsupportedEllipticCurve(constants::Curve),
/// Unsupported symmetric key algorithm.
#[fail(display = "Unsupported symmetric algorithm: {}", _0)]
UnsupportedSymmetricAlgorithm(SymmetricAlgorithm),
/// Unsupported AEAD algorithm.
#[fail(display = "Unsupported AEAD algorithm: {}", _0)]
UnsupportedAEADAlgorithm(constants::AEADAlgorithm),
/// Unsupported Compression algorithm.
#[fail(display = "Unsupported Compression algorithm: {}", _0)]
UnsupportedCompressionAlgorithm(constants::CompressionAlgorithm),
/// Unsupported signature type.
#[fail(display = "Unsupported signature type: {}", _0)]
UnsupportedSignatureType(SignatureType),
/// Invalid password.
#[fail(display = "Invalid password")]
InvalidPassword,
/// Invalid session key.
#[fail(display = "Invalid session key: {}", _0)]
InvalidSessionKey(String),
/// Missing session key.
#[fail(display = "Missing session key: {}", _0)]
MissingSessionKey(String),
/// Malformed MPI.
#[fail(display = "Malformed MPI: {}", _0)]
MalformedMPI(String),
/// Bad signature.
#[fail(display = "Bad signature: {}", _0)]
BadSignature(String),
/// Message has been manipulated.
#[fail(display = "Message has been manipulated")]
ManipulatedMessage,
/// Malformed message.
#[fail(display = "Malformed Message: {}", _0)]
MalformedMessage(String),
/// Malformed tranferable public key.
#[fail(display = "Malformed TPK: {}", _0)]
MalformedTPK(String),
/// Unsupported TPK.
///
/// This usually occurs, because the primary key is in an
/// unsupported format. In particular, Sequoia does not support
/// version 3 keys.
#[fail(display = "Unsupported TPK: {}", _0)]
UnsupportedTPK(String),
/// Index out of range.
#[fail(display = "Index out of range")]
IndexOutOfRange,
}
/// The OpenPGP packets that Sequoia understands.
///
/// The different OpenPGP packets are detailed in [Section 5 of RFC 4880].
///
/// The `Unknown` packet allows Sequoia to deal with packets that it
/// doesn't understand. The `Unknown` packet is basically a binary
/// blob that includes the packet's tag.
///
/// The unknown packet is also used for packets that are understood,
/// but use unsupported options. For instance, when the packet parser
/// encounters a compressed data packet with an unknown compression
/// algorithm, it returns the packet in an `Unknown` packet rather
/// than a `CompressedData` packet.
///
/// [Section 5 of RFC 4880]: https://tools.ietf.org/html/rfc4880#section-5
#[derive(Debug)]
#[derive(PartialEq, Eq, Hash, Clone)]
pub enum Packet {
/// Unknown packet.
Unknown(packet::Unknown),
/// Signature packet.
Signature(packet::Signature),
/// One pass signature packet.
OnePassSig(packet::OnePassSig),
/// Public key packet.
PublicKey(packet::key::PublicKey),
/// Public subkey packet.
PublicSubkey(packet::key::PublicSubkey),
/// Public/Secret key pair.
SecretKey(packet::key::SecretKey),
/// Public/Secret subkey pair.
SecretSubkey(packet::key::SecretSubkey),
/// Marker packet.
Marker(packet::Marker),
/// Trust packet.
Trust(packet::Trust),
/// User ID packet.
UserID(packet::UserID),
/// User attribute packet.
UserAttribute(packet::UserAttribute),
/// Literal data packet.
Literal(packet::Literal),
|