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|
use std::fmt;
use crate::{
RevocationStatus,
packet::key,
packet::Key,
packet::key::SecretKeyMaterial,
constants::KeyFlags,
packet::Signature,
TPK,
tpk::KeyBindingIter,
};
/// An iterator over all `Key`s (both the primary key and any subkeys)
/// in a TPK.
///
/// Returned by `TPK::keys_all()` and `TPK::keys_valid()`.
///
/// `KeyIter` follows the builder pattern. There is no need to
/// explicitly finalize it, however: it already implements the
/// `Iterator` interface.
///
/// By default, `KeyIter` will only return live, non-revoked keys. It
/// is possible to control how `KeyIter` filters using, for instance,
/// `KeyIter::flags` to only return keys with particular flags set.
pub struct KeyIter<'a, P: key::KeyParts, R: key::KeyRole> {
// This is an option to make it easier to create an empty KeyIter.
tpk: Option<&'a TPK>,
primary: bool,
subkey_iter: KeyBindingIter<'a,
key::PublicParts,
key::SubordinateRole>,
// If not None, only returns keys with the specified flags.
flags: Option<KeyFlags>,
// If not None, only returns keys that are live at the specified
// time.
alive_at: Option<time::Tm>,
// If not None, filters by revocation status.
revoked: Option<bool>,
// If not None, filters by whether a key has a secret.
secret: Option<bool>,
// If not None, filters by whether a key has an unencrypted
// secret.
unencrypted_secret: Option<bool>,
_p: std::marker::PhantomData<P>,
_r: std::marker::PhantomData<R>,
}
impl<'a, P: key::KeyParts, R: key::KeyRole> fmt::Debug
for KeyIter<'a, P, R>
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("KeyIter")
.field("flags", &self.flags)
.field("alive_at", &self.alive_at)
.field("revoked", &self.revoked)
.field("secret", &self.secret)
.field("unencrypted_secret", &self.unencrypted_secret)
.finish()
}
}
impl<'a, P: 'a + key::KeyParts, R: 'a + key::KeyRole> Iterator
for KeyIter<'a, P, R>
where &'a Key<P, R>: From<&'a Key<key::PublicParts,
key::UnspecifiedRole>>
{
type Item = (Option<&'a Signature>, RevocationStatus<'a>, &'a Key<P, R>);
fn next(&mut self) -> Option<Self::Item> {
tracer!(false, "KeyIter::next", 0);
t!("KeyIter: {:?}", self);
if self.tpk.is_none() {
return None;
}
let tpk = self.tpk.unwrap();
if let Some(flags) = self.flags.as_ref() {
if flags.is_empty() {
// Nothing to do.
t!("short circuiting: flags is empty");
return None;
}
}
loop {
let (sigo, revoked, key) : (_, _, &key::UnspecifiedPublic)
= if ! self.primary {
self.primary = true;
(tpk.primary_key_signature(None),
tpk.revoked(None),
tpk.primary().key().into())
} else {
self.subkey_iter.next()
.map(|sk_binding| (sk_binding.binding_signature(None),
sk_binding.revoked(None),
sk_binding.key().into(),))?
};
t!("Considering key: {:?}", key);
if let Some(flags) = self.flags.as_ref() {
if let Some(sig) = sigo {
if (&sig.key_flags() & &flags).is_empty() {
t!("Have flags: {:?}, want flags: {:?}... skipping.",
sig.key_flags(), flags);
continue;
}
} else {
// No self-signature, skip it.
t!("No self-signature... skipping.");
continue;
}
}
if let Some(alive_at) = self.alive_at {
if let Some(sig) = sigo {
if ! sig.key_alive_at(key, alive_at) {
t!("Key not alive... skipping.");
continue;
}
} else {
// No self-signature, skip it.
t!("No self-signature... skipping.");
continue;
}
}
if let Some(want_revoked) = self.revoked {
if let RevocationStatus::Revoked(_) = revoked {
// The key is definitely revoked.
if ! want_revoked {
t!("Key revoked... skipping.");
continue;
}
} else {
// The key is probably not revoked.
if want_revoked {
t!("Key not revoked... skipping.");
continue;
}
}
}
if let Some(want_secret) = self.secret {
if key.secret().is_some() {
// We have a secret.
if ! want_secret {
t!("Have a secret... skipping.");
continue;
}
} else {
if want_secret {
t!("No secret... skipping.");
continue;
}
}
}
if let Some(want_unencrypted_secret) = self.unencrypted_secret {
if let Some(secret) = key.secret() {
if let SecretKeyMaterial::Unencrypted { .. } = secret {
if ! want_unencrypted_secret {
|