subscription: move most of the implmentation into impl feature

so we can use the types without having openssl, proxmox-sys, etc. as
dependencies.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

proxmox-subscription/Cargo.toml

@@ -13,20 +13,21 @@ rust-version.workspace = true
 
 [dependencies]
 anyhow.workspace = true
-base64.workspace = true
-hex.workspace = true
-openssl.workspace = true
+base64 = { workspace = true, optional = true }
+hex = { workspace = true, optional = true }
+openssl = { workspace = true, optional = true }
 regex.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 
-proxmox-http = { workspace = true, features = ["client-trait", "http-helpers"] }
+proxmox-http = { workspace = true, optional = true, features = ["client-trait", "http-helpers"] }
 proxmox-serde.workspace = true
-proxmox-sys.workspace = true
-proxmox-time.workspace = true
+proxmox-sys = { workspace = true, optional = true }
+proxmox-time = { workspace = true, optional = true }
 
 proxmox-schema = { workspace = true, features = ["api-macro"], optional = true }
 
 [features]
-default = []
+default = ["impl"]
+impl = [ "dep:base64", "dep:hex", "dep:openssl", "dep:proxmox-http", "dep:proxmox-sys", "dep:proxmox-time"]
 api-types = ["dep:proxmox-schema"]

proxmox-subscription/src/lib.rs

@@ -1,10 +1,17 @@
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
 
 mod subscription_info;
+#[cfg(feature = "impl")]
 pub use subscription_info::{
     get_hardware_address, ProductType, SubscriptionInfo, SubscriptionStatus,
 };
 
+#[cfg(not(feature = "impl"))]
+pub use subscription_info::{ProductType, SubscriptionInfo, SubscriptionStatus};
+
+#[cfg(feature = "impl")]
 pub mod check;
+#[cfg(feature = "impl")]
 pub mod files;
+#[cfg(feature = "impl")]
 pub mod sign;

proxmox-subscription/src/subscription_info.rs

@@ -1,23 +1,11 @@
-use std::{fmt::Display, path::Path, str::FromStr};
+use std::{fmt::Display, str::FromStr};
 
-use anyhow::{bail, format_err, Error};
-use openssl::hash::{hash, DigestBytes, MessageDigest};
-use proxmox_sys::fs::file_get_contents;
-use proxmox_time::TmEditor;
+use anyhow::{bail, Error};
 use serde::{Deserialize, Serialize};
 
 #[cfg(feature = "api-types")]
 use proxmox_schema::{api, Updater};
 
-use crate::sign::Verifier;
-
-pub(crate) const SHARED_KEY_DATA: &str = "kjfdlskfhiuewhfk947368";
-
-/// How long the local key is valid for in between remote checks
-pub(crate) const SUBSCRIPTION_MAX_LOCAL_KEY_AGE: i64 = 15 * 24 * 3600;
-pub(crate) const SUBSCRIPTION_MAX_LOCAL_SIGNED_KEY_AGE: i64 = 365 * 24 * 3600;
-pub(crate) const SUBSCRIPTION_MAX_KEY_CHECK_FAILURE_AGE: i64 = 5 * 24 * 3600;
-
 // Aliases are needed for PVE compat!
 #[cfg_attr(feature = "api-types", api())]
 #[derive(Default, Debug, Copy, Clone, Eq, PartialEq, Serialize, Deserialize)]
@@ -144,7 +132,35 @@ pub struct SubscriptionInfo {
     pub signature: Option<String>,
 }
 
-impl SubscriptionInfo {
+#[cfg(feature = "impl")]
+pub use _impl::get_hardware_address;
+
+#[cfg(feature = "impl")]
+pub(crate) use _impl::{md5sum, SHARED_KEY_DATA};
+
+#[cfg(feature = "impl")]
+mod _impl {
+
+    use std::path::Path;
+
+    use anyhow::format_err;
+    use anyhow::{bail, Error};
+    use openssl::hash::{hash, DigestBytes, MessageDigest};
+    use proxmox_sys::fs::file_get_contents;
+    use proxmox_time::TmEditor;
+
+    use crate::sign::Verifier;
+
+    pub(crate) const SHARED_KEY_DATA: &str = "kjfdlskfhiuewhfk947368";
+
+    /// How long the local key is valid for in between remote checks
+    pub(crate) const SUBSCRIPTION_MAX_LOCAL_KEY_AGE: i64 = 15 * 24 * 3600;
+    pub(crate) const SUBSCRIPTION_MAX_LOCAL_SIGNED_KEY_AGE: i64 = 365 * 24 * 3600;
+    pub(crate) const SUBSCRIPTION_MAX_KEY_CHECK_FAILURE_AGE: i64 = 5 * 24 * 3600;
+
+    use super::{ProductType, SubscriptionInfo, SubscriptionStatus};
+
+    impl SubscriptionInfo {
         /// Returns the canonicalized signed data and, if available, signature contained in `self`.
         pub fn signed_data(&self) -> Result<(Vec<u8>, Option<String>), Error> {
             let mut data = serde_json::to_value(self)?;
@@ -293,25 +309,26 @@ impl SubscriptionInfo {
                 .ok_or_else(|| format_err!("no next due date set"))
                 .map(|e| parse_next_due(e))?
         }
-}
+    }
 
-/// Shortcut for md5 sums.
-pub(crate) fn md5sum(data: &[u8]) -> Result<DigestBytes, Error> {
+    /// Shortcut for md5 sums.
+    pub(crate) fn md5sum(data: &[u8]) -> Result<DigestBytes, Error> {
         hash(MessageDigest::md5(), data).map_err(Error::from)
-}
+    }
 
-/// Generate the current system's "server ID".
-pub fn get_hardware_address() -> Result<String, Error> {
+    /// Generate the current system's "server ID".
+    pub fn get_hardware_address() -> Result<String, Error> {
         static FILENAME: &str = "/etc/ssh/ssh_host_rsa_key.pub";
 
         let contents = proxmox_sys::fs::file_get_contents(FILENAME)
             .map_err(|e| format_err!("Error getting host key - {}", e))?;
-    let digest = md5sum(&contents).map_err(|e| format_err!("Error digesting host key - {}", e))?;
+        let digest =
+            md5sum(&contents).map_err(|e| format_err!("Error digesting host key - {}", e))?;
 
         Ok(hex::encode(digest).to_uppercase())
-}
+    }
 
-fn parse_next_due(value: &str) -> Result<i64, Error> {
+    fn parse_next_due(value: &str) -> Result<i64, Error> {
         let mut components = value.split('-');
         let year = components
             .next()
@@ -336,4 +353,5 @@ fn parse_next_due(value: &str) -> Result<i64, Error> {
         tm.set_mday(day)?;
 
         tm.into_epoch()
+    }
 }