Function load_verifier

pub fn load_verifier(
    input: Option<DirOrFile>,
    technology: Technology,
) -> Result<impl VerifierWriter + Debug, Error>

Returns an implementation of VerifierWriter from an input.

Depending on technology, attempts to load a verifier from file or directory if input is a DirOrFile. Attempts to load a verifier from stdin if input is None.

Note

Currently only supports Technology::Openpgp.

Errors

Returns an error if

• a verifier cannot be loaded from file/directory or stdin,
• an unsupported technology is provided.

Examples

use std::io::Write;

use tempfile::{NamedTempFile, tempdir};
use voa::commands::load_verifier;

// Write a generic OpenPGP certificate to a temporary file.
let cert = r#"-----BEGIN PGP PUBLIC KEY BLOCK-----

xjMEaNBDAhYJKwYBBAHaRw8BAQdAzjzrpQ/AEteCmzjd1xTdXGaHV0VKSm4HLy6l
HVcmWT3NH0pvaG4gRG9lIDxqb2huLmRvZUBleGFtcGxlLm9yZz7CmgQQFggAQgUC
aNBDAhYhBEauMg3lOimFWKbyoPtSEBy0DfYKAhsDAh4BBAsJCAcGFQ4KCQwIARYN
JwkCCAIHAgkBCAEHAQIZAQAKCRD7UhActA32CkhIAP9bhoLJeZRCAc+q1kFEkstT
uXBPlzHagF6ghuUfToMmVQD+KaakONKSekglKR4rJxzhleQJ4qsptt1gjXX13QgF
Xwo=
=Pkv9
-----END PGP PUBLIC KEY BLOCK-----"#;
let mut temp_file = NamedTempFile::new()?;
write!(temp_file, "{cert}")?;
let input_path = temp_file.path();

// Load an OpenPGP verifier from file.
let verifier = load_verifier(Some(input_path.try_into()?), "openpgp".parse()?)?;

// Loading a verifier from file for an unknown technology will fail.
assert!(load_verifier(Some(input_path.try_into()?), "foo".parse()?).is_err());