[PATCH proxmox-backup 05/16] config: use proxmox_tls_certificates for generating self-signed certificates

[Shannon Sterz <s.sterz@proxmox.com>]

to avoid duplicating almost identical code here, re-use the version
from `proxmox_tls_certificates::create_self_signed_cert`. for
`days_valid` specify `None` to opt into the default of 3650 days.

Signed-off-by: Shannon Sterz <s.sterz@proxmox.com>
---
 Cargo.toml        |  3 ++
 debian/control    |  2 +
 src/config/mod.rs | 94 ++++-------------------------------------------
 3 files changed, 13 insertions(+), 86 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index a2dcf85c3..df5f8942c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -97,6 +97,7 @@ proxmox-sys = "1"
 proxmox-systemd = "1.0.1"
 proxmox-tfa = { version = "6.0.3", features = [ "api", "api-types" ] }
 proxmox-time = "2"
+proxmox-tls-certificates = { version = "1", features = [ "impl" ] }
 proxmox-upgrade-checks = "1"
 proxmox-uuid = { version = "1", features = [ "serde" ] }
 proxmox-worker-task = "1"
@@ -255,6 +256,7 @@ proxmox-sys = { workspace = true, features = [ "timer" ] }
 proxmox-systemd.workspace = true
 proxmox-tfa.workspace = true
 proxmox-time.workspace = true
+proxmox-tls-certificates.workspace = true
 proxmox-upgrade-checks.workspace = true
 proxmox-uuid.workspace = true
 proxmox-worker-task.workspace = true
@@ -325,6 +327,7 @@ proxmox-rrd-api-types.workspace = true
 #proxmox-systemd = { path = "../proxmox/proxmox-systemd" }
 #proxmox-tfa = { path = "../proxmox/proxmox-tfa" }
 #proxmox-time = { path = "../proxmox/proxmox-time" }
+#proxmox-tls-certificates = { path = "../proxmox/proxmox-tls-certificates" }
 #proxmox-upgrade-checks = { path = "../proxmox/proxmox-upgrade-checks" }
 #proxmox-uuid = { path = "../proxmox/proxmox-uuid" }
 #proxmox-worker-task = { path = "../proxmox/proxmox-worker-task" }
diff --git a/debian/control b/debian/control
index d8dcabdb7..8b9607fff 100644
--- a/debian/control
+++ b/debian/control
@@ -132,6 +132,8 @@ Build-Depends: debhelper (>= 12~),
                librust-proxmox-tfa-6+api-types-dev (>= 6.0.3-~~),
                librust-proxmox-tfa-6+default-dev (>= 6.0.3-~~),
                librust-proxmox-time-2+default-dev,
+               librust-proxmox-tls-certificates-1+default-dev,
+               librust-proxmox-tls-certificates-1+impl-dev,
                librust-proxmox-upgrade-checks-1+default-dev,
                librust-proxmox-uuid-1+default-dev,
                librust-proxmox-uuid-1+serde-dev,
diff --git a/src/config/mod.rs b/src/config/mod.rs
index 98683186e..bbca5a9af 100644
--- a/src/config/mod.rs
+++ b/src/config/mod.rs
@@ -5,9 +5,6 @@
 
 use anyhow::{Error, bail, format_err};
 use nix::sys::stat::Mode;
-use openssl::pkey::PKey;
-use openssl::rsa::Rsa;
-use openssl::x509::X509Builder;
 use std::path::Path;
 
 use proxmox_lang::try_block;
@@ -90,92 +87,17 @@ pub fn update_self_signed_cert(force: bool) -> Result<(), Error> {
     if key_path.exists() && cert_path.exists() && !force {
         return Ok(());
     }
-
-    let rsa = Rsa::generate(4096).unwrap();
-
-    let priv_pem = rsa.private_key_to_pem()?;
-
-    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_sys::nodename();
-    let mut fqdn = nodename.to_owned();
-
     let resolv_conf = crate::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_uuid::Uuid::generate();
+    let (priv_key, cert) = proxmox_tls_certificates::create_self_signed_cert(
+        "Proxmox Backup Server",
+        proxmox_sys::nodename(),
+        resolv_conf["search"].as_str(),
+        None,
+    )?;
 
-    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!("{uuid:X}"))?;
-    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");
-
-    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()?;
+    let cert_pem = cert.to_pem()?;
+    let priv_pem = priv_key.private_key_to_pem_pkcs8()?;
 
     set_proxy_certificate(&cert_pem, &priv_pem)?;
 
-- 
2.47.3