move fingerprint helpers from pbs-tools to pbs-api-types

Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>

pbs-api-types/Cargo.toml

@@ -7,6 +7,7 @@ description = "general API type helpers for PBS"
 
 [dependencies]
 anyhow = "1.0"
+hex = "0.4.3"
 lazy_static = "1.4"
 libc = "0.2"
 nix = "0.19.1"
@@ -21,4 +22,3 @@ proxmox-time = "1.0.0"
 proxmox-uuid = { version = "1.0.0", features = [ "serde" ] }
 
 proxmox-systemd = { path = "../proxmox-systemd" }
-pbs-tools = { path = "../pbs-tools" }

pbs-api-types/src/crypto.rs

@@ -5,8 +5,6 @@ use serde::{Deserialize, Serialize};
 
 use proxmox_schema::api;
 
-use pbs_tools::format::{as_fingerprint, bytes_as_fingerprint};
-
 #[api(default: "encrypt")]
 #[derive(Copy, Clone, Debug, Eq, PartialEq, Deserialize, Serialize)]
 #[serde(rename_all = "kebab-case")]
@@ -55,3 +53,43 @@ impl std::str::FromStr for Fingerprint {
     }
 }
 
+fn as_fingerprint(bytes: &[u8]) -> String {
+    hex::encode(bytes)
+        .as_bytes()
+        .chunks(2)
+        .map(|v| unsafe { std::str::from_utf8_unchecked(v) }) // it's a hex string
+        .collect::<Vec<&str>>().join(":")
+}
+
+pub mod bytes_as_fingerprint {
+    use std::mem::MaybeUninit;
+
+    use serde::{Deserialize, Serializer, Deserializer};
+
+    pub fn serialize<S>(
+        bytes: &[u8; 32],
+        serializer: S,
+    ) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let s = super::as_fingerprint(bytes);
+        serializer.serialize_str(&s)
+    }
+
+    pub fn deserialize<'de, D>(
+        deserializer: D,
+    ) -> Result<[u8; 32], D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        // TODO: more efficiently implement with a Visitor implementing visit_str using split() and
+        // hex::decode by-byte
+        let mut s = String::deserialize(deserializer)?;
+        s.retain(|c| c != ':');
+        let mut out = MaybeUninit::<[u8; 32]>::uninit();
+        hex::decode_to_slice(s.as_bytes(), unsafe { &mut (*out.as_mut_ptr())[..] })
+            .map_err(serde::de::Error::custom)?;
+        Ok(unsafe { out.assume_init() })
+    }
+}

pbs-api-types/src/lib.rs

@@ -64,7 +64,7 @@ pub use user::*;
 pub use proxmox_schema::upid::*;
 
 mod crypto;
-pub use crypto::{CryptMode, Fingerprint};
+pub use crypto::{CryptMode, Fingerprint, bytes_as_fingerprint};
 
 pub mod file_restore;