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pub enum RevocationType {
    Hard,
    Soft,
}
Expand description

Describes whether a ReasonForRevocation should be consider hard or soft.

A hard revocation is a revocation that indicates that the key was somehow compromised, and the provence of all artifacts should be called into question.

A soft revocation is a revocation that indicates that the key should be considered invalid after the revocation signature’s creation time. KeySuperseded, KeyRetired, and UIDRetired are considered soft revocations.

Examples

A certificate is considered to be revoked when a hard revocation is present even if it is not live at the specified time.

Here, a certificate is generated at t0 and then revoked later at t2. At t1 (t0 < t1 < t2) depending on the revocation type it will be either considered revoked (hard revocation) or not revoked (soft revocation):

use std::time::{Duration, SystemTime};
use openpgp::cert::prelude::*;
use openpgp::types::{RevocationStatus, ReasonForRevocation};
use openpgp::policy::StandardPolicy;

let p = &StandardPolicy::new();

let t0 = SystemTime::now();
let (cert, _) =
    CertBuilder::general_purpose(None, Some("alice@example.org"))
    .set_creation_time(t0)
    .generate()?;

let t2 = t0 + Duration::from_secs(3600);

let mut signer = cert.primary_key().key().clone()
    .parts_into_secret()?.into_keypair()?;

// Create a hard revocation (KeyCompromised):
let sig = CertRevocationBuilder::new()
    .set_reason_for_revocation(ReasonForRevocation::KeyCompromised,
                               b"The butler did it :/")?
    .set_signature_creation_time(t2)?
    .build(&mut signer, &cert, None)?;

let t1 = t0 + Duration::from_secs(1200);
let cert1 = cert.clone().insert_packets(sig.clone())?;
assert_eq!(cert1.revocation_status(p, Some(t1)),
           RevocationStatus::Revoked(vec![&sig.into()]));

// Create a soft revocation (KeySuperseded):
let sig = CertRevocationBuilder::new()
    .set_reason_for_revocation(ReasonForRevocation::KeySuperseded,
                               b"Migrated to key XYZ")?
    .set_signature_creation_time(t2)?
    .build(&mut signer, &cert, None)?;

let t1 = t0 + Duration::from_secs(1200);
let cert2 = cert.clone().insert_packets(sig.clone())?;
assert_eq!(cert2.revocation_status(p, Some(t1)),
           RevocationStatus::NotAsFarAsWeKnow);

Variants

Hard

A hard revocation.

Artifacts stemming from the revoked object should not be trusted.

Soft

A soft revocation.

Artifacts stemming from the revoked object after the revocation time should not be trusted. Earlier objects should be considered okay.

Only KeySuperseded, KeyRetired, and UIDRetired are considered soft revocations. All other reasons for revocations including unknown reasons are considered hard revocations.

Trait Implementations

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