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|
use std::borrow::Cow;
use std::io;
use std::ops::{Deref, DerefMut};
use std::path::Path;
use {
Result,
TPK,
Error,
};
use packet::{
signature::{Signature, KeyPair},
Tag,
UserID,
Key,
};
use serialize::{
Serialize,
SerializeKey,
};
use parse::{Parse, PacketParserResult};
/// A transferable secret key (TSK).
///
/// A TSK (see [RFC 4880, section 11.2]) can be used to create
/// signatures and decrypt data.
///
/// [RFC 4880, section 11.2]: https://tools.ietf.org/html/rfc4880#section-11.2
#[derive(Debug, PartialEq)]
pub struct TSK {
key: TPK,
}
impl Deref for TSK {
type Target = TPK;
fn deref(&self) -> &Self::Target {
&self.key
}
}
impl DerefMut for TSK {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.key
}
}
impl<'a> Parse<'a, TSK> for TSK {
/// Initializes a `TSK` from a `Read`er.
fn from_reader<R: 'a + io::Read>(reader: R) -> Result<Self> {
TPK::from_reader(reader).map(|tpk| Self::from_tpk(tpk))
}
/// Initializes a `TSK` from a `File`.
fn from_file<P: AsRef<Path>>(path: P) -> Result<Self> {
TPK::from_file(path).map(|tpk| Self::from_tpk(tpk))
}
/// Initializes a `TSK` from a byte string.
fn from_bytes(data: &'a [u8]) -> Result<Self> {
TPK::from_bytes(data).map(|tpk| Self::from_tpk(tpk))
}
}
impl TSK {
/// Initializes a `TSK` from a `PacketParser`.
pub fn from_packet_parser<'a>(ppr: PacketParserResult<'a>) -> Result<Self> {
TPK::from_packet_parser(ppr).map(|tpk| Self::from_tpk(tpk))
}
pub(crate) fn from_tpk(tpk: TPK) -> TSK {
TSK{ key: tpk }
}
/// Generates a new key OpenPGP key. The key will be capable of encryption
/// and signing. If no user id is given the primary self signature will be
/// a direct key signature.
pub fn new<'a, O: Into<Option<Cow<'a,str>>>>(primary_uid: O)
-> Result<(TSK, Signature)> {
use tpk::TPKBuilder;
let mut key = TPKBuilder::autocrypt(None);
match primary_uid.into() {
Some(uid) => { key = key.add_userid(&uid); }
None => {}
}
let (tpk, revocation) = key.generate()?;
Ok((TSK::from_tpk(tpk), revocation))
}
/// Returns a reference to the corresponding TPK.
pub fn tpk<'a>(&'a self) -> &'a TPK {
&self.key
}
/// Converts to a TPK.
pub fn into_tpk(self) -> TPK {
self.key
}
/// Signs `key` and `userid` with a 3rd party certification.
pub fn certify_userid(&self, key: &Key, userid: &UserID) -> Result<Signature> {
use packet::{KeyFlags, signature, key::SecretKey};
use constants::{HashAlgorithm, SignatureType};
let caps = KeyFlags::default().set_certify(true);
let keys = self.key.select_keys(caps, None);
match keys.first() {
Some(ref my_key) => {
match my_key.secret() {
Some(&SecretKey::Unencrypted{ ref mpis }) => {
signature::Builder::new(SignatureType::GenericCertificate)
.sign_userid_binding(
&mut KeyPair::new(my_key, mpis)?,
key, userid, HashAlgorithm::SHA512)
}
_ => Err(Error::InvalidOperation(
"secret key missing or encrypted".into()).into()),
}
}
None => Err(Error::InvalidOperation(
"this key cannot certify keys".into()).into()),
}
}
/// Signs the primary key's self signatures of `key`.
pub fn certify_key(&self, key: &TPK) -> Result<Signature> {
match key.primary_key_signature_full() {
None | Some((None, _)) =>
Err(Error::InvalidOperation(
"this key has nothing to certify".into()).into()),
Some((Some(uid), _)) =>
self.certify_userid(key.primary(), uid.userid()),
}
}
}
impl Serialize for TSK {
/// Serializes the TSK.
fn serialize<W: io::Write>(&self, o: &mut W) -> Result<()> {
self.key.primary.serialize(o, Tag::SecretKey)?;
for s in self.key.primary_selfsigs.iter() {
s.serialize(o)?;
}
for s in self.key.primary_self_revocations.iter() {
s.serialize(o)?;
}
for s in self.key.primary_certifications.iter() {
s.serialize(o)?;
}
for s in self.key.primary_other_revocations.iter() {
s.serialize(o)?;
}
for u in self.key.userids() {
u.userid().serialize(o)?;
for s in u.self_revocations() {
s.serialize(o)?;
}
for s in u.selfsigs() {
s.serialize(o)?;
}
for s in u.other_revocations() {
s.serialize(o)?;
}
for s in u.certifications() {
s.serialize(o)?;
}
}
for u in self.key.user_attributes() {
u.user_attribute().serialize(o)?;
for s in u.self_revocations() {
s.serialize(o)?;
}
for s in u.selfsigs() {
s.serialize(o)?;
}
for s in u.other_revocations() {
s.serialize(o)?;
}
for s in u.certifications() {
s.serialize(o)?;
}
}
for k in self.key.subkeys() {
k.subkey().serialize(o, Tag::SecretSubkey)?;
for s in k.self_revocations</
|
