diff --git a/diced/src/error.rs b/diced/src/error.rs
new file mode 100644
index 0000000..92aa97c
--- /dev/null
+++ b/diced/src/error.rs
@@ -0,0 +1,125 @@
+// Copyright 2021, The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use android_security_dice::aidl::android::security::dice::ResponseCode::ResponseCode;
+use anyhow::Result;
+use binder::{
+    public_api::Result as BinderResult, ExceptionCode, Status as BinderStatus, StatusCode,
+};
+use keystore2_selinux as selinux;
+use std::ffi::CString;
+
+/// This is the main Diced error type. It wraps the Diced `ResponseCode` generated
+/// from AIDL in the `Rc` variant and Binder and BinderTransaction errors in the respective
+/// variants.
+#[allow(dead_code)] // Binder error forwarding will be needed when proxy nodes are implemented.
+#[derive(Debug, thiserror::Error, Eq, PartialEq, Clone)]
+pub enum Error {
+    /// Wraps a dice `ResponseCode` as defined by the android.security.dice AIDL interface
+    /// specification.
+    #[error("Error::Rc({0:?})")]
+    Rc(ResponseCode),
+    /// Wraps a Binder exception code other than a service specific exception.
+    #[error("Binder exception code {0:?}, {1:?}")]
+    Binder(ExceptionCode, i32),
+    /// Wraps a Binder status code.
+    #[error("Binder transaction error {0:?}")]
+    BinderTransaction(StatusCode),
+}
+
+/// This function should be used by dice service calls to translate error conditions
+/// into service specific exceptions.
+///
+/// All error conditions get logged by this function.
+///
+/// All `Error::Rc(x)` variants get mapped onto a service specific error code of x.
+/// `selinux::Error::PermissionDenied` is mapped on `ResponseCode::PERMISSION_DENIED`.
+///
+/// All non `Error` error conditions and the Error::Binder variant get mapped onto
+/// ResponseCode::SYSTEM_ERROR`.
+///
+/// `handle_ok` will be called if `result` is `Ok(value)` where `value` will be passed
+/// as argument to `handle_ok`. `handle_ok` must generate a `BinderResult<T>`, but it
+/// typically returns Ok(value).
+///
+/// # Examples
+///
+/// ```
+/// fn do_something() -> anyhow::Result<Vec<u8>> {
+///     Err(anyhow!(Error::Rc(ResponseCode::NOT_IMPLEMENTED)))
+/// }
+///
+/// map_or_log_err(do_something(), Ok)
+/// ```
+pub fn map_or_log_err<T, U, F>(result: Result<U>, handle_ok: F) -> BinderResult<T>
+where
+    F: FnOnce(U) -> BinderResult<T>,
+{
+    map_err_with(
+        result,
+        |e| {
+            log::error!("{:?}", e);
+            e
+        },
+        handle_ok,
+    )
+}
+
+/// This function behaves similar to map_or_log_error, but it does not log the errors, instead
+/// it calls map_err on the error before mapping it to a binder result allowing callers to
+/// log or transform the error before mapping it.
+fn map_err_with<T, U, F1, F2>(result: Result<U>, map_err: F1, handle_ok: F2) -> BinderResult<T>
+where
+    F1: FnOnce(anyhow::Error) -> anyhow::Error,
+    F2: FnOnce(U) -> BinderResult<T>,
+{
+    result.map_or_else(
+        |e| {
+            let e = map_err(e);
+            let msg = match CString::new(format!("{:?}", e)) {
+                Ok(msg) => Some(msg),
+                Err(_) => {
+                    log::warn!(
+                        "Cannot convert error message to CStr. It contained a nul byte.
+                         Omitting message from service specific error."
+                    );
+                    None
+                }
+            };
+            let rc = get_error_code(&e);
+            Err(BinderStatus::new_service_specific_error(rc, msg.as_deref()))
+        },
+        handle_ok,
+    )
+}
+
+/// Extracts the error code from an `anyhow::Error` mapping any error that does not have a
+/// root cause of `Error::Rc` onto `ResponseCode::SYSTEM_ERROR` and to `e` with `Error::Rc(e)`
+/// otherwise.
+fn get_error_code(e: &anyhow::Error) -> i32 {
+    let root_cause = e.root_cause();
+    match root_cause.downcast_ref::<Error>() {
+        Some(Error::Rc(rcode)) => rcode.0,
+        // If an Error::Binder reaches this stage we report a system error.
+        // The exception code and possible service specific error will be
+        // printed in the error log above.
+        Some(Error::Binder(_, _)) | Some(Error::BinderTransaction(_)) => {
+            ResponseCode::SYSTEM_ERROR.0
+        }
+        None => match root_cause.downcast_ref::<selinux::Error>() {
+            Some(selinux::Error::PermissionDenied) => ResponseCode::PERMISSION_DENIED.0,
+            _ => ResponseCode::SYSTEM_ERROR.0,
+        },
+    }
+}