more work on DexField and DexType

androscalpel/src/apk.rs

@@ -174,13 +174,30 @@ impl Apk {
                     parameters,
                 }))
             }
+            // TODO: need method to be implemented first
             EncodedValue::MethodHandle(_val) => todo!(), //Ok(DexValue::MethodHandle(DexMethodHandle(*val))),
             EncodedValue::String(val) => Ok(DexValue::String(dex.get_string(*val)?.into())),
             EncodedValue::Type(val) => Ok(DexValue::Type(DexType(
                 dex.get_string(dex.get_type_id(*val as usize)?.descriptor_idx)?
                     .into(),
             ))),
-            EncodedValue::Field(val) => Ok(DexValue::Field(DexField(*val))),
+            EncodedValue::Field(val) => {
+                let field = dex.get_field_id(*val as usize)?;
+                let name = dex.get_string(field.name_idx)?.into();
+                let type_ = DexType(
+                    dex.get_string(dex.get_type_id(field.type_idx as usize)?.descriptor_idx)?
+                        .into(),
+                );
+                let class_ = DexType(
+                    dex.get_string(dex.get_type_id(field.class_idx as usize)?.descriptor_idx)?
+                        .into(),
+                );
+                Ok(DexValue::Field(DexField {
+                    name,
+                    type_,
+                    class_,
+                }))
+            }
             EncodedValue::Method(val) => Ok(DexValue::Method(DexMethod(*val))),
             EncodedValue::Enum(val) => Ok(DexValue::Enum(DexEnum(*val))),
             EncodedValue::Array(_val) => todo!(), //Ok(DexValue::Array(DexArray(*val))),
@@ -200,10 +217,8 @@ impl Apk {
             idx += field.field_idx_diff.0;
 
             let id_item = dex.get_field_id(idx as usize)?;
-            // Check class_idx == class? ¯\_(ツ)/¯ at least it usefull for debug
             let class_ty = dex.get_type_id(id_item.class_idx as usize)?;
             let class: DexString = dex.get_string(class_ty.descriptor_idx)?.into();
-            let class: String = class.into();
             let ty = dex.get_type_id(id_item.type_idx as usize)?;
             let ty = dex.get_string(ty.descriptor_idx)?.into();
             let name: DexString = dex.get_string(id_item.name_idx)?.into();
@@ -223,6 +238,7 @@ impl Apk {
                 (false, false, true) => FieldVisibility::Protected,
                 (false, false, false) => FieldVisibility::None_,
                 (pbl, prv, prt) => {
+                    let class: String = class.into();
                     let name: String = name.into();
                     return Err(Error::InconsistantStruct(format!(
                         "Inconsistant visiblity found in {class}.{name}: \
@@ -230,9 +246,13 @@ impl Apk {
                     )));
                 }
             };
-            fields.push(Field {
+            let descriptor = DexField {
                 name,
-                type_: ty,
+                type_: DexType(ty),
+                class_: DexType(class),
+            };
+            fields.push(Field {
+                descriptor,
                 visibility,
                 is_static,
                 is_final,

androscalpel/src/field.rs

@@ -9,13 +9,9 @@ use crate::DexString;
 #[pyclass]
 #[derive(Debug, Clone)]
 pub struct Field {
-    /// The name of the field, format described at
-    /// <https://source.android.com/docs/core/runtime/dex-format#membername>
+    /// The structure used to reference this field.
     #[pyo3(get, set)]
-    pub name: DexString,
-    /// The type of the field, format described at <>
-    #[pyo3(get, set)]
-    pub type_: DexString,
+    pub descriptor: DexField,
     /// The field visibility
     #[pyo3(get, set)]
     pub visibility: FieldVisibility,
@@ -54,10 +50,9 @@ pub enum FieldVisibility {
 #[pymethods]
 impl Field {
     #[new]
-    pub fn new(name: DexString, type_: DexString) -> Self {
+    pub fn new(descriptor: DexField) -> Self {
         Self {
-            name,
-            type_,
+            descriptor,
             visibility: FieldVisibility::Public,
             is_static: false,
             is_final: false,
@@ -101,8 +96,8 @@ impl Field {
     }
 
     pub fn __repr__(&self) -> String {
-        let name: String = (&self.name).into();
-        let ty: String = (&self.type_).into();
+        let name: String = (&self.descriptor.name).into();
+        let ty: String = (&self.descriptor.type_.0).into();
         format!("Field({name}, {ty})")
     }
 
@@ -316,6 +311,8 @@ impl DexMethodType {
 }
 
 impl DexMethodType {
+    /// Compute the format for the shorty as described in
+    /// <https://source.android.com/docs/core/runtime/dex-format#shortydescriptor>
     pub fn get_shorty(return_type: &DexType, parameters: &[DexType]) -> DexString {
         todo!()
     }
@@ -386,39 +383,55 @@ impl DexType {
     }
 
     pub fn get_name(&self) -> DexString {
-        self.0
+        self.0.clone()
     }
 
     pub fn __str__(&self) -> String {
-        self.0.into()
+        (&self.0).into()
     }
 
     pub fn __repr__(&self) -> String {
-        let name: String = self.0.into();
+        let name: String = (&self.0).into();
         format!("DexType({name})")
     }
 }
 
 #[pyclass]
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub struct DexField(pub u32);
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct DexField {
+    /// The name of the field, format described at
+    /// <https://source.android.com/docs/core/runtime/dex-format#membername>
+    #[pyo3(get, set)]
+    pub name: DexString,
+    /// The type of the field.
+    #[pyo3(get, set)]
+    pub type_: DexType,
+    /// The class that own the field.
+    #[pyo3(get, set)]
+    pub class_: DexType,
+}
+
 #[pymethods]
 impl DexField {
     #[new]
-    pub fn new(val: u32) -> Self {
-        Self(val)
-    }
-
-    pub fn get_value(&self) -> u32 {
-        self.0
+    pub fn new(name: DexString, type_: DexType, class_: DexType) -> Self {
+        Self {
+            name,
+            type_,
+            class_,
+        }
     }
 
     pub fn __str__(&self) -> String {
-        self.__repr__()
+        let class: String = self.class_.get_name().into();
+        let name: String = (&self.name).into();
+        format!("{class}.{name}")
     }
 
     pub fn __repr__(&self) -> String {
-        format!("DexField({})", self.0)
+        let class: String = self.class_.get_name().into();
+        let name: String = (&self.name).into();
+        format!("DexField({class}.{name})")
     }
 }
 
@@ -634,7 +647,7 @@ impl IntoPy<PyObject> for DexValue {
             DexValue::Long(val) => val.into_py(py),
             DexValue::Float(val) => val.into_py(py),
             DexValue::Double(val) => val.into_py(py),
-            //DexValue::MethodType(val) => val.into_py(py),
+            DexValue::MethodType(val) => val.into_py(py),
             //DexValue::MethodHandle(val) => val.into_py(py),
             DexValue::String(val) => val.into_py(py),
             DexValue::Type(val) => val.into_py(py),