1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160

use super::error::{Error, ErrorKind, Result};
use std::fmt;
/// A type which represents the various kinds of keys.
#[derive(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,
}

/// `KeyType` represents the type of an OpenSSH key.
#[derive(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,

    /// 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,
                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,
                kind: KeyTypeKind::RsaCert,
            },
            "ssh-dss" => KeyType {
                name: "ssh-dss",
                plain: "ssh-dss",
                short_name: "DSA",
                is_cert: 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,
                kind: KeyTypeKind::DsaCert,
            },
            "ecdsa-sha2-nistp256" => KeyType {
                name: "ecdsa-sha2-nistp256",
                plain: "ecdsa-sha2-nistp256",
                short_name: "ECDSA",
                is_cert: false,
                kind: KeyTypeKind::Ecdsa,
            },
            "ecdsa-sha2-nistp384" => KeyType {
                name: "ecdsa-sha2-nistp384",
                plain: "ecdsa-sha2-nistp384",
                short_name: "ECDSA",
                is_cert: false,
                kind: KeyTypeKind::Ecdsa,
            },
            "ecdsa-sha2-nistp521" => KeyType {
                name: "ecdsa-sha2-nistp521",
                plain: "ecdsa-sha2-nistp521",
                short_name: "ECDSA",
                is_cert: 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,
                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,
                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,
                kind: KeyTypeKind::EcdsaCert,
            },
            "ssh-ed25519" => KeyType {
                name: "ssh-ed25519",
                plain: "ssh-ed25519",
                short_name: "ED25519",
                is_cert: 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,
                kind: KeyTypeKind::Ed25519Cert,
            },
            _ => {
                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)
    }
}