[pbs-devel] [PATCH proxmox-backup 1/3] refactor CertInfo to tools

[Dominik Csapak <d.csapak@proxmox.com>]

we want to reuse some of the functionality elsewhere

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 src/bin/proxmox_backup_manager/cert.rs | 29 ++---------
 src/tools.rs                           |  1 +
 src/tools/cert.rs                      | 67 ++++++++++++++++++++++++++
 3 files changed, 73 insertions(+), 24 deletions(-)
 create mode 100644 src/tools/cert.rs

diff --git a/src/bin/proxmox_backup_manager/cert.rs b/src/bin/proxmox_backup_manager/cert.rs
index f5f725a..845c8ed 100644
--- a/src/bin/proxmox_backup_manager/cert.rs
+++ b/src/bin/proxmox_backup_manager/cert.rs
@@ -1,32 +1,18 @@
-use std::path::PathBuf;
-
 use anyhow::{bail, Error};
 
 use proxmox::api::{api, cli::*};
 
 use proxmox_backup::config;
-use proxmox_backup::configdir;
 use proxmox_backup::auth_helpers::*;
-
-fn x509name_to_string(name: &openssl::x509::X509NameRef) -> Result<String, Error> {
-    let mut parts = Vec::new();
-    for entry in name.entries() {
-        parts.push(format!("{} = {}", entry.object().nid().short_name()?, entry.data().as_utf8()?));
-    }
-    Ok(parts.join(", "))
-}
+use proxmox_backup::tools::cert::CertInfo;
 
 #[api]
 /// Display node certificate information.
 fn cert_info() -> Result<(), Error> {
 
-    let cert_path = PathBuf::from(configdir!("/proxy.pem"));
+    let cert = CertInfo::new()?;
 
-    let cert_pem = proxmox::tools::fs::file_get_contents(&cert_path)?;
-
-    let cert = openssl::x509::X509::from_pem(&cert_pem)?;
-
-    println!("Subject: {}", x509name_to_string(cert.subject_name())?);
+    println!("Subject: {}", cert.subject_name()?);
 
     if let Some(san) = cert.subject_alt_names() {
         for name in san.iter() {
@@ -42,17 +28,12 @@ fn cert_info() -> Result<(), Error> {
         }
     }
 
-    println!("Issuer: {}", x509name_to_string(cert.issuer_name())?);
+    println!("Issuer: {}", cert.issuer_name()?);
     println!("Validity:");
     println!("    Not Before: {}", cert.not_before());
     println!("    Not After : {}", cert.not_after());
 
-    let fp = cert.digest(openssl::hash::MessageDigest::sha256())?;
-    let fp_string = proxmox::tools::digest_to_hex(&fp);
-    let fp_string = fp_string.as_bytes().chunks(2).map(|v| std::str::from_utf8(v).unwrap())
-        .collect::<Vec<&str>>().join(":");
-
-    println!("Fingerprint (sha256): {}", fp_string);
+    println!("Fingerprint (sha256): {}", cert.fingerprint()?);
 
     let pubkey = cert.public_key()?;
     println!("Public key type: {}", openssl::nid::Nid::from_raw(pubkey.id().as_raw()).long_name()?);
diff --git a/src/tools.rs b/src/tools.rs
index 75c8d9f..4bfc35c 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -23,6 +23,7 @@ pub use proxmox::tools::fd::Fd;
 pub mod acl;
 pub mod async_io;
 pub mod borrow;
+pub mod cert;
 pub mod daemon;
 pub mod disks;
 pub mod fs;
diff --git a/src/tools/cert.rs b/src/tools/cert.rs
new file mode 100644
index 0000000..0c7e9e5
--- /dev/null
+++ b/src/tools/cert.rs
@@ -0,0 +1,67 @@
+use std::path::PathBuf;
+
+use anyhow::Error;
+use openssl::x509::{X509, GeneralName};
+use openssl::stack::Stack;
+use openssl::pkey::{Public, PKey};
+
+use crate::configdir;
+
+pub struct CertInfo {
+    x509: X509,
+}
+
+fn x509name_to_string(name: &openssl::x509::X509NameRef) -> Result<String, Error> {
+    let mut parts = Vec::new();
+    for entry in name.entries() {
+        parts.push(format!("{} = {}", entry.object().nid().short_name()?, entry.data().as_utf8()?));
+    }
+    Ok(parts.join(", "))
+}
+
+impl CertInfo {
+    pub fn new() -> Result<Self, Error> {
+        Self::from_path(PathBuf::from(configdir!("/proxy.pem")))
+    }
+
+    pub fn from_path(path: PathBuf) -> Result<Self, Error> {
+        let cert_pem = proxmox::tools::fs::file_get_contents(&path)?;
+        let x509 = openssl::x509::X509::from_pem(&cert_pem)?;
+        Ok(Self{
+            x509
+        })
+    }
+
+    pub fn subject_alt_names(&self) -> Option<Stack<GeneralName>> {
+        self.x509.subject_alt_names()
+    }
+
+    pub fn subject_name(&self) -> Result<String, Error> {
+        Ok(x509name_to_string(self.x509.subject_name())?)
+    }
+
+    pub fn issuer_name(&self) -> Result<String, Error> {
+        Ok(x509name_to_string(self.x509.issuer_name())?)
+    }
+
+    pub fn fingerprint(&self) -> Result<String, Error> {
+        let fp = self.x509.digest(openssl::hash::MessageDigest::sha256())?;
+        let fp_string = proxmox::tools::digest_to_hex(&fp);
+        let fp_string = fp_string.as_bytes().chunks(2).map(|v| std::str::from_utf8(v).unwrap())
+            .collect::<Vec<&str>>().join(":");
+        Ok(fp_string)
+    }
+
+    pub fn public_key(&self) -> Result<PKey<Public>, Error> {
+        let pubkey = self.x509.public_key()?;
+        Ok(pubkey)
+    }
+
+    pub fn not_before(&self) -> &openssl::asn1::Asn1TimeRef {
+        self.x509.not_before()
+    }
+
+    pub fn not_after(&self) -> &openssl::asn1::Asn1TimeRef {
+        self.x509.not_after()
+    }
+}
-- 
2.20.1