vsmtp-config 2.0.1-rc.4

Next-gen MTA. Secured, Faster and Greener
Documentation 
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

/*
 * vSMTP mail transfer agent
 * Copyright (C) 2022 viridIT SAS
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see https://www.gnu.org/licenses/.
 *
*/
use crate::{
    field::{FieldServerVirtualTls, SecretFile},
    parser::{tls_certificate, tls_private_key},
};
use vsmtp_auth::dkim;

impl<'de> serde::Deserialize<'de> for SecretFile<rustls::PrivateKey> {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        let s = <String as serde::Deserialize>::deserialize(deserializer)?;
        Ok(Self {
            inner: tls_private_key::from_path(&s).map_err(serde::de::Error::custom)?,
            path: s.into(),
        })
    }
}

impl<'de> serde::Deserialize<'de> for SecretFile<Vec<rustls::Certificate>> {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        let s = <String as serde::Deserialize>::deserialize(deserializer)?;
        Ok(Self {
            inner: tls_certificate::from_path(&s).map_err(serde::de::Error::custom)?,
            path: s.into(),
        })
    }
}

impl<'de> serde::Deserialize<'de> for SecretFile<rsa::RsaPrivateKey> {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        let s = <String as serde::Deserialize>::deserialize(deserializer)?;
        Ok(Self {
            inner: <rsa::RsaPrivateKey as rsa::pkcs8::DecodePrivateKey>::read_pkcs8_pem_file(&s)
                .or_else(|_| {
                    <rsa::RsaPrivateKey as rsa::pkcs1::DecodeRsaPrivateKey>::read_pkcs1_pem_file(&s)
                })
                .map_err(serde::de::Error::custom)?,
            path: s.into(),
        })
    }
}

impl<'de> serde::Deserialize<'de> for SecretFile<std::sync::Arc<dkim::PrivateKey>> {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        let filepath = <String as serde::Deserialize>::deserialize(deserializer)?;

        let rsa =
            <rsa::RsaPrivateKey as rsa::pkcs8::DecodePrivateKey>::read_pkcs8_pem_file(&filepath)
                .or_else(|_| {
                    <rsa::RsaPrivateKey as rsa::pkcs1::DecodeRsaPrivateKey>::read_pkcs1_pem_file(
                        &filepath,
                    )
                });

        if let Ok(rsa) = rsa {
            return Ok(Self {
                inner: std::sync::Arc::new(dkim::PrivateKey::Rsa(Box::new(rsa))),
                path: filepath.into(),
            });
        }

        let content = std::fs::read_to_string(&filepath)
            .map_err(|e| serde::de::Error::custom(format!("Read '{filepath}' produced: '{e}'")))?;

        let content_pem = pem::parse(content).map_err(|e| {
            serde::de::Error::custom(format!("Parsing '{filepath}' produced: '{e}'"))
        })?;

        let ed25519 = ring_compat::ring::signature::Ed25519KeyPair::from_pkcs8_maybe_unchecked(
            &content_pem.contents,
        )
        .map_err(|e| {
            serde::de::Error::custom(format!("Failed to parse '{filepath}' as ed25519: '{e}'"))
        })?;

        Ok(Self {
            inner: std::sync::Arc::new(dkim::PrivateKey::Ed25519(Box::new(ed25519))),
            path: filepath.into(),
        })
    }
}

impl FieldServerVirtualTls {
    /// create a virtual tls configuration from the certificate & private key paths.
    ///
    /// # Errors
    ///
    /// * certificate file not found.
    /// * private key file not found.
    pub fn from_path(certificate: &str, private_key: &str) -> anyhow::Result<Self> {
        Ok(Self {
            protocol_version: vec![vsmtp_common::ProtocolVersion(
                rustls::ProtocolVersion::TLSv1_3,
            )],
            certificate: SecretFile::<Vec<rustls::Certificate>> {
                inner: tls_certificate::from_path(certificate)?,
                path: certificate.into(),
            },
            private_key: SecretFile::<rustls::PrivateKey> {
                inner: tls_private_key::from_path(private_key)?,
                path: private_key.into(),
            },
        })
    }
}