src/bin/proxmox-backup-manager.rs: add cli to generate proxy certificate

Without calling external openssl binary.

src/api2/node.rs

@@ -4,7 +4,7 @@ use proxmox::api::list_subdirs_api_method;
 mod tasks;
 mod time;
 mod network;
-mod dns;
+pub mod dns;
 mod syslog;
 mod journal;
 mod services;

src/api2/node/dns.rs

@@ -16,7 +16,7 @@ use crate::api2::types::*;
 
 static RESOLV_CONF_FN: &str = "/etc/resolv.conf";
 
-fn read_etc_resolv_conf() -> Result<Value, Error> {
+pub fn read_etc_resolv_conf() -> Result<Value, Error> {
 
     let mut result = json!({});
 

src/bin/proxmox-backup-manager.rs

@@ -1,10 +1,15 @@
 use failure::*;
 use serde_json::{json, Value};
+use std::path::PathBuf;
+use nix::sys::stat::Mode;
 
+use proxmox::tools::fs::{CreateOptions, replace_file};
 use proxmox::api::{api, cli::*};
 
+use proxmox_backup::configdir;
 use proxmox_backup::tools;
 use proxmox_backup::config;
+use proxmox_backup::backup::*;
 use proxmox_backup::api2::types::*;
 use proxmox_backup::client::*;
 use proxmox_backup::tools::ticket::*;
@@ -260,11 +265,163 @@ fn task_mgmt_cli() -> CommandLineInterface {
     cmd_def.into()
 }
 
+#[api(
+    input: {
+        properties: {
+            force: {
+	        description: "Force generation of new SSL certifate.",
+	        type:  Boolean,
+	        optional:true,
+	    },
+        }
+    },
+)]
+/// Update node certificates and generate all needed files/directories.
+fn update_certs(force: Option<bool>) -> Result<(), Error> {
+
+    let backup_user = backup_user()?;
+
+    config::create_configdir()?;
+
+    if let Err(err) = generate_auth_key() {
+        bail!("unable to generate auth key - {}", err);
+    }
+
+    if let Err(err) = generate_csrf_key() {
+        bail!("unable to generate csrf key - {}", err);
+    }
+
+    //openssl req -x509 -newkey rsa:4096 -keyout /etc/proxmox-backup/proxy.key -out /etc/proxmox-backup/proxy.pem -nodes
+    let key_path = PathBuf::from(configdir!("/proxy.key"));
+    let cert_path = PathBuf::from(configdir!("/proxy.pem"));
+
+    if key_path.exists() && cert_path.exists() && !force.unwrap_or(false) { return Ok(()); }
+
+    use openssl::rsa::{Rsa};
+    use openssl::x509::{X509Builder};
+    use openssl::pkey::PKey;
+
+    let rsa = Rsa::generate(4096).unwrap();
+
+    let priv_pem = rsa.private_key_to_pem()?;
+
+    replace_file(
+        &key_path,
+        &priv_pem,
+        CreateOptions::new()
+            .perm(Mode::from_bits_truncate(0o0640))
+            .owner(nix::unistd::ROOT)
+            .group(backup_user.gid),
+    )?;
+
+    let mut x509 = X509Builder::new()?;
+
+    x509.set_version(2)?;
+
+    let today = openssl::asn1::Asn1Time::days_from_now(0)?;
+    x509.set_not_before(&today)?;
+    let expire = openssl::asn1::Asn1Time::days_from_now(365*1000)?;
+    x509.set_not_after(&expire)?;
+
+    let nodename = proxmox::tools::nodename();
+    let mut fqdn = nodename.to_owned();
+
+    let resolv_conf = proxmox_backup::api2::node::dns::read_etc_resolv_conf()?;
+    if let Some(search) = resolv_conf["search"].as_str() {
+        fqdn.push('.');
+        fqdn.push_str(search);
+    }
+
+    // we try to generate an unique 'subject' to avoid browser problems
+    //(reused serial numbers, ..)
+    let uuid = proxmox::tools::uuid::Uuid::generate();
+
+    let mut subject_name = openssl::x509::X509NameBuilder::new()?;
+    subject_name.append_entry_by_text("O", "Proxmox Backup Server")?;
+    subject_name.append_entry_by_text("OU", &format!("{:X}", uuid))?;
+    subject_name.append_entry_by_text("CN", &fqdn)?;
+    let subject_name = subject_name.build();
+
+    x509.set_subject_name(&subject_name)?;
+    x509.set_issuer_name(&subject_name)?;
+
+    let bc = openssl::x509::extension::BasicConstraints::new(); // CA = false
+    let bc = bc.build()?;
+    x509.append_extension(bc)?;
+
+    let usage = openssl::x509::extension::ExtendedKeyUsage::new()
+        .server_auth()
+        .build()?;
+    x509.append_extension(usage)?;
+
+    let context = x509.x509v3_context(None, None);
+
+    let mut alt_names = openssl::x509::extension::SubjectAlternativeName::new();
+
+    alt_names.ip("127.0.0.1");
+    alt_names.ip("::1");
+
+    // fixme: add local node IPs
+
+    alt_names.dns("localhost");
+
+    if nodename != "localhost" { alt_names.dns(nodename); }
+    if nodename != fqdn { alt_names.dns(&fqdn); }
+
+    let alt_names = alt_names.build(&context)?;
+
+    x509.append_extension(alt_names)?;
+
+    let pub_pem = rsa.public_key_to_pem()?;
+    let pubkey = PKey::public_key_from_pem(&pub_pem)?;
+
+    x509.set_pubkey(&pubkey)?;
+
+    let context = x509.x509v3_context(None, None);
+    let ext = openssl::x509::extension::SubjectKeyIdentifier::new().build(&context)?;
+    x509.append_extension(ext)?;
+
+    let context = x509.x509v3_context(None, None);
+    let ext = openssl::x509::extension::AuthorityKeyIdentifier::new()
+        .keyid(true)
+        .build(&context)?;
+    x509.append_extension(ext)?;
+
+    let privkey = PKey::from_rsa(rsa)?;
+
+    x509.sign(&privkey, openssl::hash::MessageDigest::sha256())?;
+
+    let x509 = x509.build();
+    let cert_pem = x509.to_pem()?;
+
+    replace_file(
+        &cert_path,
+        &cert_pem,
+        CreateOptions::new()
+            .perm(Mode::from_bits_truncate(0o0640))
+            .owner(nix::unistd::ROOT)
+            .group(backup_user.gid),
+    )?;
+
+    Ok(())
+}
+
+fn cert_mgmt_cli() -> CommandLineInterface {
+
+    let update_cert_cmd_def = CliCommand::new(&API_METHOD_UPDATE_CERTS);
+
+    let cmd_def = CliCommandMap::new()
+        .insert("update", update_cert_cmd_def);
+
+    cmd_def.into()
+}
+
 fn main() {
 
     let cmd_def = CliCommandMap::new()
         .insert("datastore", datastore_commands())
         .insert("garbage-collection", garbage_collection_commands())
+        .insert("cert", cert_mgmt_cli())
         .insert("task", task_mgmt_cli());
 
     run_cli_command(cmd_def);