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a8f268af DM |
1 | //! Proxmox Backup Server Configuration library |
2 | //! | |
3 | //! This library contains helper to read, parse and write the | |
4 | //! configuration files. | |
5 | ||
f7d4e4b5 | 6 | use anyhow::{bail, format_err, Error}; |
f8fd5095 DM |
7 | use std::path::PathBuf; |
8 | use nix::sys::stat::Mode; | |
9 | use openssl::rsa::{Rsa}; | |
10 | use openssl::x509::{X509Builder}; | |
11 | use openssl::pkey::PKey; | |
a8f268af | 12 | |
f8fd5095 | 13 | use proxmox::tools::fs::{CreateOptions, replace_file}; |
9ea4bce4 | 14 | use proxmox::try_block; |
e18a6c9e | 15 | |
a8f268af DM |
16 | use crate::buildcfg; |
17 | ||
5c6cdf98 | 18 | pub mod acl; |
423e6561 | 19 | pub mod cached_user_info; |
90d515c9 | 20 | pub mod datastore; |
f34d4401 | 21 | pub mod network; |
90d515c9 | 22 | pub mod remote; |
6f652b1b | 23 | pub mod sync; |
f8adf8f8 | 24 | pub mod token_shadow; |
90d515c9 | 25 | pub mod user; |
9b2bad7a | 26 | pub mod verify; |
5c20e2da | 27 | |
a8f268af DM |
28 | /// Check configuration directory permissions |
29 | /// | |
30 | /// For security reasons, we want to make sure they are set correctly: | |
31 | /// * owned by 'backup' user/group | |
32 | /// * nobody else can read (mode 0700) | |
8fdef1a8 | 33 | pub fn check_configdir_permissions() -> Result<(), Error> { |
a8f268af | 34 | let cfgdir = buildcfg::CONFIGDIR; |
f74a03da DM |
35 | |
36 | let backup_user = crate::backup::backup_user()?; | |
37 | let backup_uid = backup_user.uid.as_raw(); | |
38 | let backup_gid = backup_user.gid.as_raw(); | |
a8f268af DM |
39 | |
40 | try_block!({ | |
41 | let stat = nix::sys::stat::stat(cfgdir)?; | |
42 | ||
43 | if stat.st_uid != backup_uid { | |
5c20e2da | 44 | bail!("wrong user ({} != {})", stat.st_uid, backup_uid); |
a8f268af DM |
45 | } |
46 | if stat.st_gid != backup_gid { | |
5c20e2da | 47 | bail!("wrong group ({} != {})", stat.st_gid, backup_gid); |
a8f268af DM |
48 | } |
49 | ||
50 | let perm = stat.st_mode & 0o777; | |
51 | if perm != 0o700 { | |
5c20e2da | 52 | bail!("wrong permission ({:o} != {:o})", perm, 0o700); |
a8f268af DM |
53 | } |
54 | Ok(()) | |
5c20e2da WB |
55 | }) |
56 | .map_err(|err| { | |
57 | format_err!( | |
58 | "configuration directory '{}' permission problem - {}", | |
59 | cfgdir, | |
60 | err | |
61 | ) | |
62 | }) | |
a8f268af DM |
63 | } |
64 | ||
65 | pub fn create_configdir() -> Result<(), Error> { | |
a8f268af | 66 | let cfgdir = buildcfg::CONFIGDIR; |
a8f268af DM |
67 | |
68 | match nix::unistd::mkdir(cfgdir, Mode::from_bits_truncate(0o700)) { | |
5c20e2da | 69 | Ok(()) => {} |
a8f268af | 70 | Err(nix::Error::Sys(nix::errno::Errno::EEXIST)) => { |
8fdef1a8 | 71 | check_configdir_permissions()?; |
a8f268af | 72 | return Ok(()); |
5c20e2da WB |
73 | } |
74 | Err(err) => bail!( | |
75 | "unable to create configuration directory '{}' - {}", | |
76 | cfgdir, | |
77 | err | |
78 | ), | |
a8f268af DM |
79 | } |
80 | ||
f74a03da | 81 | let backup_user = crate::backup::backup_user()?; |
a8f268af | 82 | |
f74a03da DM |
83 | nix::unistd::chown(cfgdir, Some(backup_user.uid), Some(backup_user.gid)) |
84 | .map_err(|err| { | |
85 | format_err!( | |
86 | "unable to set configuration directory '{}' permissions - {}", | |
87 | cfgdir, | |
88 | err | |
89 | ) | |
90 | }) | |
a8f268af | 91 | } |
f8fd5095 DM |
92 | |
93 | /// Update self signed node certificate. | |
94 | pub fn update_self_signed_cert(force: bool) -> Result<(), Error> { | |
95 | ||
96 | let backup_user = crate::backup::backup_user()?; | |
97 | ||
98 | create_configdir()?; | |
99 | ||
100 | let key_path = PathBuf::from(configdir!("/proxy.key")); | |
101 | let cert_path = PathBuf::from(configdir!("/proxy.pem")); | |
102 | ||
103 | if key_path.exists() && cert_path.exists() && !force { return Ok(()); } | |
104 | ||
105 | let rsa = Rsa::generate(4096).unwrap(); | |
106 | ||
107 | let priv_pem = rsa.private_key_to_pem()?; | |
108 | ||
109 | replace_file( | |
110 | &key_path, | |
111 | &priv_pem, | |
112 | CreateOptions::new() | |
113 | .perm(Mode::from_bits_truncate(0o0640)) | |
114 | .owner(nix::unistd::ROOT) | |
115 | .group(backup_user.gid), | |
116 | )?; | |
117 | ||
118 | let mut x509 = X509Builder::new()?; | |
119 | ||
120 | x509.set_version(2)?; | |
121 | ||
122 | let today = openssl::asn1::Asn1Time::days_from_now(0)?; | |
123 | x509.set_not_before(&today)?; | |
124 | let expire = openssl::asn1::Asn1Time::days_from_now(365*1000)?; | |
125 | x509.set_not_after(&expire)?; | |
126 | ||
127 | let nodename = proxmox::tools::nodename(); | |
128 | let mut fqdn = nodename.to_owned(); | |
129 | ||
130 | let resolv_conf = crate::api2::node::dns::read_etc_resolv_conf()?; | |
131 | if let Some(search) = resolv_conf["search"].as_str() { | |
132 | fqdn.push('.'); | |
133 | fqdn.push_str(search); | |
134 | } | |
135 | ||
136 | // we try to generate an unique 'subject' to avoid browser problems | |
137 | //(reused serial numbers, ..) | |
138 | let uuid = proxmox::tools::uuid::Uuid::generate(); | |
139 | ||
140 | let mut subject_name = openssl::x509::X509NameBuilder::new()?; | |
141 | subject_name.append_entry_by_text("O", "Proxmox Backup Server")?; | |
142 | subject_name.append_entry_by_text("OU", &format!("{:X}", uuid))?; | |
143 | subject_name.append_entry_by_text("CN", &fqdn)?; | |
144 | let subject_name = subject_name.build(); | |
145 | ||
146 | x509.set_subject_name(&subject_name)?; | |
147 | x509.set_issuer_name(&subject_name)?; | |
148 | ||
149 | let bc = openssl::x509::extension::BasicConstraints::new(); // CA = false | |
150 | let bc = bc.build()?; | |
151 | x509.append_extension(bc)?; | |
152 | ||
153 | let usage = openssl::x509::extension::ExtendedKeyUsage::new() | |
154 | .server_auth() | |
155 | .build()?; | |
156 | x509.append_extension(usage)?; | |
157 | ||
158 | let context = x509.x509v3_context(None, None); | |
159 | ||
160 | let mut alt_names = openssl::x509::extension::SubjectAlternativeName::new(); | |
161 | ||
162 | alt_names.ip("127.0.0.1"); | |
163 | alt_names.ip("::1"); | |
164 | ||
165 | alt_names.dns("localhost"); | |
166 | ||
167 | if nodename != "localhost" { alt_names.dns(nodename); } | |
168 | if nodename != fqdn { alt_names.dns(&fqdn); } | |
169 | ||
170 | let alt_names = alt_names.build(&context)?; | |
171 | ||
172 | x509.append_extension(alt_names)?; | |
173 | ||
174 | let pub_pem = rsa.public_key_to_pem()?; | |
175 | let pubkey = PKey::public_key_from_pem(&pub_pem)?; | |
176 | ||
177 | x509.set_pubkey(&pubkey)?; | |
178 | ||
179 | let context = x509.x509v3_context(None, None); | |
180 | let ext = openssl::x509::extension::SubjectKeyIdentifier::new().build(&context)?; | |
181 | x509.append_extension(ext)?; | |
182 | ||
183 | let context = x509.x509v3_context(None, None); | |
184 | let ext = openssl::x509::extension::AuthorityKeyIdentifier::new() | |
185 | .keyid(true) | |
186 | .build(&context)?; | |
187 | x509.append_extension(ext)?; | |
188 | ||
189 | let privkey = PKey::from_rsa(rsa)?; | |
190 | ||
191 | x509.sign(&privkey, openssl::hash::MessageDigest::sha256())?; | |
192 | ||
193 | let x509 = x509.build(); | |
194 | let cert_pem = x509.to_pem()?; | |
195 | ||
196 | replace_file( | |
197 | &cert_path, | |
198 | &cert_pem, | |
199 | CreateOptions::new() | |
200 | .perm(Mode::from_bits_truncate(0o0640)) | |
201 | .owner(nix::unistd::ROOT) | |
202 | .group(backup_user.gid), | |
203 | )?; | |
204 | ||
205 | Ok(()) | |
206 | } |