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use super::error::{Error, ErrorKind, Result};
use std::fmt;
/// A type which represents the various kinds of keys.
#[derive(Clone, Debug, PartialEq)]
pub enum KeyTypeKind {
/// Represents an RSA key type.
Rsa,
/// Represents a DSA key type.
Dsa,
/// Represents an ED25519 key type.
Ed25519,
/// Represents an ECDSA key type.
Ecdsa,
/// Represents an RSA certificate key type.
RsaCert,
/// Represents a DSA certificate key type.
DsaCert,
/// Represents an ED25519 certificate key type.
Ed25519Cert,
/// Represents an ECDSA certificate key type.
EcdsaCert,
/// Represents an ED25519 key type, generated by a security key.
Ed25519Sk,
/// Represents an ECDSA key type, generated by a security key.
EcdsaSk,
}
/// `KeyType` represents the type of an OpenSSH key.
#[derive(Clone, Debug, PartialEq)]
pub struct KeyType {
/// Name of the key type.
pub name: &'static str,
/// Short name of the key type.
pub short_name: &'static str,
/// Indicates whether the key type represents a certificate or not.
pub is_cert: bool,
/// Indicates whether the key type is used with a security key or not
pub is_sk: bool,
/// Kind of the key type.
pub kind: KeyTypeKind,
/// The cert-less equivalent to a certified key type.
pub plain: &'static str,
}
impl KeyType {
/// Creates a new `KeyType` from a given name.
///
/// # Example
/// ```rust
/// # use sshkeys;
/// let kt = sshkeys::KeyType::from_name("ssh-rsa").unwrap();
/// assert_eq!(kt.kind, sshkeys::KeyTypeKind::Rsa);
/// ```
pub fn from_name(name: &str) -> Result<KeyType> {
let kt = match name {
"ssh-rsa" => KeyType {
name: "ssh-rsa",
plain: "ssh-rsa",
short_name: "RSA",
is_cert: false,
is_sk: false,
kind: KeyTypeKind::Rsa,
},
"ssh-rsa-cert-v01@openssh.com" => KeyType {
name: "ssh-rsa-cert-v01@openssh.com",
plain: "ssh-rsa",
short_name: "RSA-CERT",
is_cert: true,
is_sk: false,
kind: KeyTypeKind::RsaCert,
},
"ssh-dss" => KeyType {
name: "ssh-dss",
plain: "ssh-dss",
short_name: "DSA",
is_cert: false,
is_sk: false,
kind: KeyTypeKind::Dsa,
},
"ssh-dss-cert-v01@openssh.com" => KeyType {
name: "ssh-dss-cert-v01@openssh.com",
plain: "ssh-dss",
short_name: "DSA-CERT",
is_cert: true,
is_sk: false,
kind: KeyTypeKind::DsaCert,
},
"ecdsa-sha2-nistp256" => KeyType {
name: "ecdsa-sha2-nistp256",
plain: "ecdsa-sha2-nistp256",
short_name: "ECDSA",
is_cert: false,
is_sk: false,
kind: KeyTypeKind::Ecdsa,
},
"ecdsa-sha2-nistp384" => KeyType {
name: "ecdsa-sha2-nistp384",
plain: "ecdsa-sha2-nistp384",
short_name: "ECDSA",
is_cert: false,
is_sk: false,
kind: KeyTypeKind::Ecdsa,
},
"ecdsa-sha2-nistp521" => KeyType {
name: "ecdsa-sha2-nistp521",
plain: "ecdsa-sha2-nistp521",
short_name: "ECDSA",
is_cert: false,
is_sk: false,
kind: KeyTypeKind::Ecdsa,
},
"ecdsa-sha2-nistp256-cert-v01@openssh.com" => KeyType {
name: "ecdsa-sha2-nistp256-cert-v01@openssh.com",
plain: "ecdsa-sha2-nistp256",
short_name: "ECDSA-CERT",
is_cert: true,
is_sk: false,
kind: KeyTypeKind::EcdsaCert,
},
"ecdsa-sha2-nistp384-cert-v01@openssh.com" => KeyType {
name: "ecdsa-sha2-nistp384-cert-v01@openssh.com",
plain: "ecdsa-sha2-nistp384",
short_name: "ECDSA-CERT",
is_cert: true,
is_sk: false,
kind: KeyTypeKind::EcdsaCert,
},
"ecdsa-sha2-nistp521-cert-v01@openssh.com" => KeyType {
name: "ecdsa-sha2-nistp521-cert-v01@openssh.com",
plain: "ecdsa-sha2-nistp521",
short_name: "ECDSA-CERT",
is_cert: true,
is_sk: false,
kind: KeyTypeKind::EcdsaCert,
},
"ssh-ed25519" => KeyType {
name: "ssh-ed25519",
plain: "ssh-ed25519",
short_name: "ED25519",
is_cert: false,
is_sk: false,
kind: KeyTypeKind::Ed25519,
},
"ssh-ed25519-cert-v01@openssh.com" => KeyType {
name: "ssh-ed25519-cert-v01@openssh.com",
plain: "ssh-ed25519",
short_name: "ED25519-CERT",
is_cert: true,
is_sk: false,
kind: KeyTypeKind::Ed25519Cert,
},
"sk-ecdsa-sha2-nistp256@openssh.com" => KeyType {
name: "sk-ecdsa-sha2-nistp256@openssh.com",
plain: "sk-ecdsa-sha2-nistp256@openssh.com",
short_name: "ECDSA-SK",
is_cert: false,
is_sk: true,
kind: KeyTypeKind::EcdsaSk,
},
"sk-ssh-ed25519@openssh.com" => KeyType {
name: "sk-ssh-ed25519@openssh.com",
plain: "sk-ssh-ed25519@openssh.com",
short_name: "ED25519-SK",
is_cert: false,
is_sk: true,
kind: KeyTypeKind::Ed25519Sk,
},
_ => {
return Err(Error::with_kind(ErrorKind::UnknownKeyType(
name.to_string(),
)))
}
};
Ok(kt)
}
}
impl fmt::Display for KeyType {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.name)
}
}