[−][src]Struct sequoia_openpgp::packet::user_attribute::UserAttribute
Holds a UserAttribute packet.
See Section 5.12 of RFC 4880 for details.
Implementations
impl UserAttribute
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pub fn new(subpackets: &[Subpacket]) -> Result<Self>
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Returns a new UserAttribute
packet.
Note: a valid UserAttribute has at least one subpacket.
pub fn hash_algo_security(&self) -> HashAlgoSecurity
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The security requirements of the hash algorithm for self-signatures.
A cryptographic hash algorithm usually has three security properties: pre-image resistance, second pre-image resistance, and collision resistance. If an attacker can influence the signed data, then the hash algorithm needs to have both second pre-image resistance, and collision resistance. If not, second pre-image resistance is sufficient.
In general, an attacker may be able to influence third-party signatures. But direct key signatures, and binding signatures are only over data fully determined by signer. And, an attacker's control over self signatures over User IDs is limited due to their structure.
These observations can be used to extend the life of a hash algorithm after its collision resistance has been partially compromised, but not completely broken. For more details, please refer to the documentation for HashAlgoSecurity.
pub fn value(&self) -> &[u8]
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Gets the user attribute packet's raw, unparsed value.
Most likely you will want to use subpackets()
to iterate
over the subpackets.
pub fn value_mut(&mut self) -> &mut Vec<u8>
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Gets a mutable reference to the user attribute packet's raw value.
pub fn subpackets(&self) -> SubpacketIterator<'_>ⓘNotable traits for SubpacketIterator<'a>
impl<'a> Iterator for SubpacketIterator<'a> type Item = Result<Subpacket>;
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Notable traits for SubpacketIterator<'a>
impl<'a> Iterator for SubpacketIterator<'a> type Item = Result<Subpacket>;
Iterates over the subpackets.
impl UserAttribute
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pub fn bind(
&self,
signer: &mut dyn Signer,
cert: &Cert,
signature: SignatureBuilder
) -> Result<Signature>
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&self,
signer: &mut dyn Signer,
cert: &Cert,
signature: SignatureBuilder
) -> Result<Signature>
Creates a binding signature.
The signature binds this user attribute to cert
. signer
will be used to create a signature using signature
as
builder. Thehash_algo
defaults to SHA512, creation_time
to the current time.
This function adds a creation time subpacket, a issuer fingerprint subpacket, and a issuer subpacket to the signature.
Examples
This example demonstrates how to bind this user attribute to a
Cert. Note that in general, the CertBuilder
is a better way
to add userids to a Cert.
// Generate a Cert, and create a keypair from the primary key. let (cert, _) = CertBuilder::new() .generate()?; let mut keypair = cert.primary_key().key().clone() .parts_into_secret()?.into_keypair()?; assert_eq!(cert.userids().len(), 0); // Generate a user attribute and a binding signature. let user_attr = UserAttribute::new(&[ Subpacket::Image( Image::Private(100, vec![0, 1, 2].into_boxed_slice())), ])?; let builder = signature::SignatureBuilder::new(SignatureType::PositiveCertification); let binding = user_attr.bind(&mut keypair, &cert, builder)?; // Now merge the user attribute and binding signature into the Cert. let cert = cert.insert_packets(vec![Packet::from(user_attr), binding.into()])?; // Check that we have a user attribute. assert_eq!(cert.user_attributes().count(), 1);
pub fn certify<S, H, T>(
&self,
signer: &mut dyn Signer,
cert: &Cert,
signature_type: S,
hash_algo: H,
creation_time: T
) -> Result<Signature> where
S: Into<Option<SignatureType>>,
H: Into<Option<HashAlgorithm>>,
T: Into<Option<SystemTime>>,
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&self,
signer: &mut dyn Signer,
cert: &Cert,
signature_type: S,
hash_algo: H,
creation_time: T
) -> Result<Signature> where
S: Into<Option<SignatureType>>,
H: Into<Option<HashAlgorithm>>,
T: Into<Option<SystemTime>>,
Returns a certificate for the user attribute.
The signature binds this user attribute to cert
. signer
will be
used to create a certification signature of type
signature_type
. signature_type
defaults to
SignatureType::GenericCertification
, hash_algo
to SHA512,
creation_time
to the current time.
This function adds a creation time subpacket, a issuer fingerprint subpacket, and a issuer subpacket to the signature.
Errors
Returns Error::InvalidArgument
if signature_type
is not
one of SignatureType::{Generic, Persona, Casual, Positive}Certificate
Examples
This example demonstrates how to certify a userid.
// Generate a Cert, and create a keypair from the primary key. let (alice, _) = CertBuilder::new() .add_userid("alice@example.org") .generate()?; let mut keypair = alice.primary_key().key().clone() .parts_into_secret()?.into_keypair()?; // Generate a Cert for Bob. let user_attr = UserAttribute::new(&[ Subpacket::Image( Image::Private(100, vec![0, 1, 2].into_boxed_slice())), ])?; let (bob, _) = CertBuilder::new() .set_primary_key_flags(KeyFlags::empty().set_certification()) .add_user_attribute(user_attr) .generate()?; // Alice now certifies the binding between `bob@example.org` and `bob`. let certificate = bob.user_attributes().nth(0).unwrap() .certify(&mut keypair, &bob, SignatureType::PositiveCertification, None, None)?; // `certificate` can now be used, e.g. by merging it into `bob`. let bob = bob.insert_packets(certificate)?; // Check that we have a certification on the userid. assert_eq!(bob.user_attributes().nth(0).unwrap() .certifications().len(), 1);
Trait Implementations
impl Clone for UserAttribute
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pub fn clone(&self) -> UserAttribute
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pub fn clone_from(&mut self, source: &Self)
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impl Debug for UserAttribute
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impl Eq for UserAttribute
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impl From<UserAttribute> for Packet
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pub fn from(s: UserAttribute) -> Self
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impl From<Vec<u8, Global>> for UserAttribute
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impl Hash for UserAttribute
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impl Hash for UserAttribute
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pub fn hash<__H: Hasher>(&self, state: &mut __H)
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pub fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl IntoIterator for UserAttribute
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Implement IntoIterator
so that
cert::insert_packets(sig)
just works.
type Item = UserAttribute
The type of the elements being iterated over.
type IntoIter = Once<UserAttribute>
Which kind of iterator are we turning this into?
pub fn into_iter(self) -> Self::IntoIter
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impl Marshal for UserAttribute
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pub fn serialize(&self, o: &mut dyn Write) -> Result<()>
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pub fn export(&self, o: &mut dyn Write) -> Result<()>
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impl MarshalInto for UserAttribute
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pub fn serialized_len(&self) -> usize
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pub fn serialize_into(&self, buf: &mut [u8]) -> Result<usize>
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pub fn to_vec(&self) -> Result<Vec<u8>>
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pub fn export_into(&self, buf: &mut [u8]) -> Result<usize>
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pub fn export_to_vec(&self) -> Result<Vec<u8>>
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impl Ord for UserAttribute
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pub fn cmp(&self, other: &UserAttribute) -> Ordering
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#[must_use]pub fn max(self, other: Self) -> Self
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#[must_use]pub fn min(self, other: Self) -> Self
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#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self
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impl<'a> Parse<'a, UserAttribute> for UserAttribute
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pub fn from_reader<R: 'a + Read + Send + Sync>(reader: R) -> Result<Self>
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pub fn from_file<P: AsRef<Path>>(path: P) -> Result<T>
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pub fn from_bytes<D: AsRef<[u8]> + ?Sized + Send + Sync>(
data: &'a D
) -> Result<T>
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data: &'a D
) -> Result<T>
impl PartialEq<UserAttribute> for UserAttribute
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pub fn eq(&self, other: &UserAttribute) -> bool
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pub fn ne(&self, other: &UserAttribute) -> bool
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impl PartialOrd<UserAttribute> for UserAttribute
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pub fn partial_cmp(&self, other: &UserAttribute) -> Option<Ordering>
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pub fn lt(&self, other: &UserAttribute) -> bool
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pub fn le(&self, other: &UserAttribute) -> bool
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pub fn gt(&self, other: &UserAttribute) -> bool
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pub fn ge(&self, other: &UserAttribute) -> bool
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impl StructuralEq for UserAttribute
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impl StructuralPartialEq for UserAttribute
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Auto Trait Implementations
impl RefUnwindSafe for UserAttribute
impl Send for UserAttribute
impl Sync for UserAttribute
impl Unpin for UserAttribute
impl UnwindSafe for UserAttribute
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,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> DynClone for T where
T: Clone,
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T: Clone,
pub fn __clone_box(&self, Private) -> *mut ()
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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> Same<T> for T
type Output = T
Should always be Self
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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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.
pub 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>,