[−][src]Struct sequoia_openpgp::parse::stream::Verifier
Verifies a signed OpenPGP message.
Signature verification requires processing the whole message first. Therefore, OpenPGP implementations supporting streaming operations necessarily must output unverified data. This has been a source of problems in the past. To alleviate this, we buffer up to 25 megabytes of net message data first, and verify the signatures if the message fits into our buffer. Nevertheless it is important to treat the data as unverified and untrustworthy until you have seen a positive verification.
For a signature to be considered valid: The signature must have a
Signature Creation Time
subpacket. The signature must be alive
at the signature verification time (the time passed to
Verifier::from_reader
). The key used to verify the signature
must be alive at the signature creation time, not have been soft
revoked at the signature creation time, not have ever been hard
revoked, and be signing capable at the signature creation time.
Example
extern crate sequoia_openpgp as openpgp; use std::io::Read; use openpgp::{KeyID, Cert, Result}; use openpgp::parse::stream::*; use openpgp::policy::StandardPolicy; let p = &StandardPolicy::new(); // This fetches keys and computes the validity of the verification. struct Helper {}; impl VerificationHelper for Helper { fn get_public_keys(&mut self, _ids: &[openpgp::KeyHandle]) -> Result<Vec<Cert>> { Ok(Vec::new()) // Feed the Certs to the verifier here... } fn check(&mut self, structure: MessageStructure) -> Result<()> { Ok(()) // Implement your verification policy here. } } let message = b"-----BEGIN PGP MESSAGE----- xA0DAAoWBpwMNI3YLBkByxJiAAAAAABIZWxsbyBXb3JsZCHCdQQAFgoAJwWCW37P 8RahBI6MM/pGJjN5dtl5eAacDDSN2CwZCZAGnAw0jdgsGQAAeZQA/2amPbBXT96Q O7PFms9DRuehsVVrFkaDtjN2WSxI4RGvAQDq/pzNdCMpy/Yo7AZNqZv5qNMtDdhE b2WH5lghfKe/AQ== =DjuO -----END PGP MESSAGE-----"; let h = Helper {}; let mut v = Verifier::from_bytes(p, message, h, None)?; let mut content = Vec::new(); v.read_to_end(&mut content)?; assert_eq!(content, b"Hello World!");
Implementations
impl<'a, H: VerificationHelper> Verifier<'a, H>
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pub fn from_reader<R, T>(
policy: &'a dyn Policy,
reader: R,
helper: H,
t: T
) -> Result<Verifier<'a, H>> where
R: Read + 'a,
T: Into<Option<SystemTime>>,
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policy: &'a dyn Policy,
reader: R,
helper: H,
t: T
) -> Result<Verifier<'a, H>> where
R: Read + 'a,
T: Into<Option<SystemTime>>,
Creates a Verifier
from the given reader.
Signature verifications are done relative to time t
, or the
current time, if t
is None
.
pub fn from_file<P, T>(
policy: &'a dyn Policy,
path: P,
helper: H,
t: T
) -> Result<Verifier<'a, H>> where
P: AsRef<Path>,
T: Into<Option<SystemTime>>,
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policy: &'a dyn Policy,
path: P,
helper: H,
t: T
) -> Result<Verifier<'a, H>> where
P: AsRef<Path>,
T: Into<Option<SystemTime>>,
Creates a Verifier
from the given file.
Signature verifications are done relative to time t
, or the
current time, if t
is None
.
pub fn from_bytes<T>(
policy: &'a dyn Policy,
bytes: &'a [u8],
helper: H,
t: T
) -> Result<Verifier<'a, H>> where
T: Into<Option<SystemTime>>,
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policy: &'a dyn Policy,
bytes: &'a [u8],
helper: H,
t: T
) -> Result<Verifier<'a, H>> where
T: Into<Option<SystemTime>>,
Creates a Verifier
from the given buffer.
Signature verifications are done relative to time t
, or the
current time, if t
is None
.
pub fn helper_ref(&self) -> &H
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Returns a reference to the helper.
pub fn helper_mut(&mut self) -> &mut H
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Returns a mutable reference to the helper.
pub fn into_helper(self) -> H
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Recovers the helper.
pub fn message_processed(&self) -> bool
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Returns true if the whole message has been processed and the verification result is ready.
If the function returns false the message did not fit into the internal buffer and
unverified data must be read()
from the instance until EOF.
Trait Implementations
impl<'a, H: VerificationHelper> Read for Verifier<'a, H>
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fn read(&mut self, buf: &mut [u8]) -> Result<usize>
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fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> Result<usize, Error>
1.36.0[src]
fn is_read_vectored(&self) -> bool
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unsafe fn initializer(&self) -> Initializer
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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>
1.0.0[src]
fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
1.0.0[src]
fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
1.6.0[src]
fn by_ref(&mut self) -> &mut Self
1.0.0[src]
fn bytes(self) -> Bytes<Self>
1.0.0[src]
fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,
1.0.0[src]
R: Read,
fn take(self, limit: u64) -> Take<Self>
1.0.0[src]
Auto Trait Implementations
impl<'a, H> !RefUnwindSafe for Verifier<'a, H>
impl<'a, H> !Send for Verifier<'a, H>
impl<'a, H> !Sync for Verifier<'a, H>
impl<'a, H> Unpin for Verifier<'a, H> where
H: Unpin,
H: Unpin,
impl<'a, H> !UnwindSafe for Verifier<'a, H>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,