Pass buffers to pgp.rs as slices

src/dc_imex.rs

@@ -211,12 +211,8 @@ pub fn dc_render_setup_file(context: &Context, passphrase: &str) -> Result<Strin
     let encr = {
         let private_key_asc_c = CString::yolo(private_key_asc);
         let passphrase_c = CString::yolo(passphrase);
-        dc_pgp_symm_encrypt(
-            passphrase_c.as_ptr(),
-            private_key_asc_c.as_ptr() as *const libc::c_void,
-            private_key_asc_c.as_bytes().len(),
-        )
-        .ok_or(format_err!("Failed to encrypt private key."))?
+        dc_pgp_symm_encrypt(passphrase_c.as_ptr(), private_key_asc_c.as_bytes())
+            .ok_or(format_err!("Failed to encrypt private key."))?
     };
     let replacement = format!(
         concat!(
@@ -449,9 +445,10 @@ pub unsafe fn dc_decrypt_setup_file(
             || binary_bytes == 0)
         {
             /* decrypt symmetrically */
-            if let Some(plain) =
-                dc_pgp_symm_decrypt(passphrase, binary as *const libc::c_void, binary_bytes)
-            {
+            if let Some(plain) = dc_pgp_symm_decrypt(
+                passphrase,
+                std::slice::from_raw_parts(binary as *const u8, binary_bytes),
+            ) {
                 let payload_c = CString::new(plain).unwrap();
                 payload = strdup(payload_c.as_ptr());
             }

src/e2ee.rs

@@ -299,8 +299,10 @@ impl E2eeHelper {
                                 ok_to_continue = false;
                             } else {
                                 if let Some(ctext_v) = dc_pgp_pk_encrypt(
-                                    (*plain).str_0 as *const libc::c_void,
-                                    (*plain).len,
+                                    std::slice::from_raw_parts(
+                                        (*plain).str_0 as *const u8,
+                                        (*plain).len,
+                                    ),
                                     &keyring,
                                     sign_key.as_ref(),
                                 ) {
@@ -907,8 +909,7 @@ unsafe fn decrypt_part(
 
                 /*if we already have fingerprints, do not add more; this ensures, only the fingerprints from the outer-most part are collected */
                 if let Some(plain) = dc_pgp_pk_decrypt(
-                    decoded_data as *const libc::c_void,
-                    decoded_data_bytes,
+                    std::slice::from_raw_parts(decoded_data as *const u8, decoded_data_bytes),
                     &private_keyring,
                     &public_keyring_for_validate,
                     add_signatures,

src/pgp.rs

@@ -188,15 +188,11 @@ pub fn dc_pgp_create_keypair(addr: impl AsRef<str>) -> Option<(Key, Key)> {
 }
 
 pub fn dc_pgp_pk_encrypt(
-    plain_text: *const libc::c_void,
-    plain_bytes: size_t,
+    plain: &[u8],
     public_keys_for_encryption: &Keyring,
     private_key_for_signing: Option<&Key>,
 ) -> Option<String> {
-    assert!(!plain_text.is_null() && !plain_bytes > 0, "invalid input");
-
-    let bytes = unsafe { std::slice::from_raw_parts(plain_text as *const u8, plain_bytes) };
-    let lit_msg = Message::new_literal_bytes("", bytes);
+    let lit_msg = Message::new_literal_bytes("", plain);
     let pkeys: Vec<&SignedPublicKey> = public_keys_for_encryption
         .keys()
         .into_iter()
@@ -227,16 +223,11 @@ pub fn dc_pgp_pk_encrypt(
 }
 
 pub fn dc_pgp_pk_decrypt(
-    ctext: *const libc::c_void,
-    ctext_bytes: size_t,
+    ctext: &[u8],
     private_keys_for_decryption: &Keyring,
     public_keys_for_validation: &Keyring,
     ret_signature_fingerprints: Option<&mut HashSet<String>>,
 ) -> Option<Vec<u8>> {
-    assert!(!ctext.is_null() && ctext_bytes > 0, "invalid input");
-
-    let ctext = unsafe { std::slice::from_raw_parts(ctext as *const u8, ctext_bytes) };
-
     // TODO: proper error handling
     if let Ok((msg, _)) = Message::from_armor_single(Cursor::new(ctext)) {
         let skeys: Vec<&SignedSecretKey> = private_keys_for_decryption
@@ -283,19 +274,13 @@ pub fn dc_pgp_pk_decrypt(
 }
 
 /// Symmetric encryption.
-pub fn dc_pgp_symm_encrypt(
-    passphrase: *const libc::c_char,
-    plain: *const libc::c_void,
-    plain_bytes: size_t,
-) -> Option<String> {
+pub fn dc_pgp_symm_encrypt(passphrase: *const libc::c_char, plain: &[u8]) -> Option<String> {
     assert!(!passphrase.is_null(), "invalid passphrase");
-    assert!(!plain.is_null() && !plain_bytes > 0, "invalid input");
 
     let pw = unsafe { CStr::from_ptr(passphrase).to_str().unwrap() };
-    let bytes = unsafe { std::slice::from_raw_parts(plain as *const u8, plain_bytes) };
 
     let mut rng = thread_rng();
-    let lit_msg = Message::new_literal_bytes("", bytes);
+    let lit_msg = Message::new_literal_bytes("", plain);
 
     let s2k = StringToKey::new_default(&mut rng);
     let msg = lit_msg.encrypt_with_password(&mut rng, s2k, Default::default(), || pw.into());
@@ -304,18 +289,12 @@ pub fn dc_pgp_symm_encrypt(
 }
 
 /// Symmetric decryption.
-pub fn dc_pgp_symm_decrypt(
-    passphrase: *const libc::c_char,
-    ctext: *const libc::c_void,
-    ctext_bytes: size_t,
-) -> Option<Vec<u8>> {
+pub fn dc_pgp_symm_decrypt(passphrase: *const libc::c_char, ctext: &[u8]) -> Option<Vec<u8>> {
     assert!(!passphrase.is_null(), "invalid passphrase");
-    assert!(!ctext.is_null() && !ctext_bytes > 0, "invalid input");
 
     let pw = unsafe { CStr::from_ptr(passphrase).to_str().unwrap() };
-    let bytes = unsafe { std::slice::from_raw_parts(ctext as *const u8, ctext_bytes) };
 
-    let enc_msg = Message::from_bytes(Cursor::new(bytes));
+    let enc_msg = Message::from_bytes(Cursor::new(ctext));
 
     enc_msg
         .and_then(|msg| {