refactor: move dc_preconfigure_keypair() implementation into deltachat crate

This allows to hide `DcKey` trait from public API.

deltachat-ffi/src/lib.rs

@@ -29,10 +29,9 @@ use deltachat::contact::{Contact, ContactId, Origin};
 use deltachat::context::Context;
 use deltachat::ephemeral::Timer as EphemeralTimer;
 use deltachat::imex::BackupProvider;
-use deltachat::key::DcKey;
+use deltachat::key::preconfigure_keypair;
 use deltachat::message::MsgId;
 use deltachat::net::read_url_blob;
-use deltachat::pgp::KeyPair;
 use deltachat::qr_code_generator::{generate_backup_qr, get_securejoin_qr_svg};
 use deltachat::reaction::{get_msg_reactions, send_reaction, Reactions};
 use deltachat::stock_str::StockMessage;
@@ -796,21 +795,13 @@ pub unsafe extern "C" fn dc_preconfigure_keypair(
         return 0;
     }
     let ctx = &*context;
-    block_on(async move {
-        let addr = tools::EmailAddress::new(&to_string_lossy(addr))?;
-        let public = key::SignedPublicKey::from_asc(&to_string_lossy(public_data))?.0;
-        let secret = key::SignedSecretKey::from_asc(&to_string_lossy(secret_data))?.0;
-        let keypair = KeyPair {
-            addr,
-            public,
-            secret,
-        };
-        key::store_self_keypair(ctx, &keypair, key::KeyPairUse::Default).await?;
-        Ok::<_, anyhow::Error>(1)
-    })
-    .context("Failed to save keypair")
-    .log_err(ctx)
-    .unwrap_or(0)
+    let addr = to_string_lossy(addr);
+    let public_data = to_string_lossy(public_data);
+    let secret_data = to_string_lossy(secret_data);
+    block_on(preconfigure_keypair(ctx, &addr, &public_data, &secret_data))
+        .context("Failed to save keypair")
+        .log_err(ctx)
+        .is_ok() as libc::c_int
 }
 
 #[no_mangle]

src/key.rs

@@ -24,7 +24,7 @@ use crate::tools::{time, EmailAddress};
 /// This trait is implemented for rPGP's [SignedPublicKey] and
 /// [SignedSecretKey] types and makes working with them a little
 /// easier in the deltachat world.
-pub trait DcKey: Serialize + Deserializable + KeyTrait + Clone {
+pub(crate) trait DcKey: Serialize + Deserializable + KeyTrait + Clone {
     /// Create a key from some bytes.
     fn from_slice(bytes: &[u8]) -> Result<Self> {
         Ok(<Self as Deserializable>::from_bytes(Cursor::new(bytes))?)
@@ -307,6 +307,29 @@ pub async fn store_self_keypair(
     Ok(())
 }
 
+/// Saves a keypair as the default keys.
+///
+/// This API is used for testing purposes
+/// to avoid generating the key in tests.
+/// Use import/export APIs instead.
+pub async fn preconfigure_keypair(
+    context: &Context,
+    addr: &str,
+    public_data: &str,
+    secret_data: &str,
+) -> Result<()> {
+    let addr = EmailAddress::new(addr)?;
+    let public = SignedPublicKey::from_asc(public_data)?.0;
+    let secret = SignedSecretKey::from_asc(secret_data)?.0;
+    let keypair = KeyPair {
+        addr,
+        public,
+        secret,
+    };
+    store_self_keypair(context, &keypair, KeyPairUse::Default).await?;
+    Ok(())
+}
+
 /// A key fingerprint
 #[derive(Clone, Eq, PartialEq, Hash, serde::Serialize, serde::Deserialize)]
 pub struct Fingerprint(Vec<u8>);