diff --git a/confirmationui/aidl/Android.bp b/confirmationui/aidl/Android.bp
new file mode 100644
index 0000000..4ba4acd
--- /dev/null
+++ b/confirmationui/aidl/Android.bp
@@ -0,0 +1,38 @@
+// Copyright (C) 2022 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.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+aidl_interface {
+    name: "android.hardware.confirmationui",
+    vendor_available: true,
+    imports: [
+        "android.hardware.security.keymint-V2",
+    ],
+    srcs: ["android/hardware/confirmationui/*.aidl"],
+    stability: "vintf",
+    backend: {
+        java: {
+            platform_apis: true,
+        },
+        ndk: {
+            apps_enabled: false,
+        },
+        cpp: {
+            enabled: false,
+        },
+    },
+}
diff --git a/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/IConfirmationResultCallback.aidl b/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/IConfirmationResultCallback.aidl
new file mode 100644
index 0000000..6d6ec97
--- /dev/null
+++ b/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/IConfirmationResultCallback.aidl
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.confirmationui;
+@VintfStability
+interface IConfirmationResultCallback {
+  void result(in int error, in byte[] formattedMessage, in byte[] confirmationToken);
+}
diff --git a/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/IConfirmationUI.aidl b/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/IConfirmationUI.aidl
new file mode 100644
index 0000000..c5c7aa7
--- /dev/null
+++ b/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/IConfirmationUI.aidl
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.confirmationui;
+@VintfStability
+interface IConfirmationUI {
+  void abort();
+  void deliverSecureInputEvent(in android.hardware.security.keymint.HardwareAuthToken secureInputToken);
+  void promptUserConfirmation(in android.hardware.confirmationui.IConfirmationResultCallback resultCB, in byte[] promptText, in byte[] extraData, in @utf8InCpp String locale, in android.hardware.confirmationui.UIOption[] uiOptions);
+  const int OK = 0;
+  const int CANCELED = 1;
+  const int ABORTED = 2;
+  const int OPERATION_PENDING = 3;
+  const int IGNORED = 4;
+  const int SYSTEM_ERROR = 5;
+  const int UNIMPLEMENTED = 6;
+  const int UNEXPECTED = 7;
+  const int UI_ERROR = 65536;
+  const int UI_ERROR_MISSING_GLYPH = 65537;
+  const int UI_ERROR_MESSAGE_TOO_LONG = 65538;
+  const int UI_ERROR_MALFORMED_UTF8ENCODING = 65539;
+  const int TEST_KEY_BYTE = 165;
+  const int MAX_MESSAGE_SIZE = 6144;
+}
diff --git a/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/TestModeCommands.aidl b/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/TestModeCommands.aidl
new file mode 100644
index 0000000..b8629d1
--- /dev/null
+++ b/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/TestModeCommands.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.confirmationui;
+@Backing(type="int") @VintfStability
+enum TestModeCommands {
+  OK_EVENT = 0,
+  CANCEL_EVENT = 1,
+}
diff --git a/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/UIOption.aidl b/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/UIOption.aidl
new file mode 100644
index 0000000..ebecf9e
--- /dev/null
+++ b/confirmationui/aidl/aidl_api/android.hardware.confirmationui/current/android/hardware/confirmationui/UIOption.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.confirmationui;
+@Backing(type="int") @VintfStability
+enum UIOption {
+  ACCESSIBILITY_INVERTED = 0,
+  ACCESSIBILITY_MAGNIFIED = 1,
+}
diff --git a/confirmationui/aidl/android/hardware/confirmationui/IConfirmationResultCallback.aidl b/confirmationui/aidl/android/hardware/confirmationui/IConfirmationResultCallback.aidl
new file mode 100644
index 0000000..2165fdd
--- /dev/null
+++ b/confirmationui/aidl/android/hardware/confirmationui/IConfirmationResultCallback.aidl
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+package android.hardware.confirmationui;
+
+import android.hardware.confirmationui.IConfirmationUI;
+
+/**
+ * Callback interface passed to IConfirmationUI::promptUserConfirmation().
+ * Informs the caller about the result of the prompt operation.
+ */
+@VintfStability
+interface IConfirmationResultCallback {
+    /**
+     * This callback is called by the confirmation provider when it stops prompting the user.
+     * Iff the user has confirmed the prompted text, error is ErrorCode::OK and the
+     * parameters formattedMessage and confirmationToken hold the values needed to request
+     * a signature from keymaster.
+     * In all other cases formattedMessage and confirmationToken must be of length 0.
+     *
+     * @param error - OK: IFF the user has confirmed the prompt.
+     *              - CANCELED: If the user has pressed the cancel button.
+     *              - ABORTED: If IConfirmationUI::abort() was called.
+     *              - SYSTEM_ERROR: If an unexpected System error occurred that prevented the TUI
+     *                             from being shut down gracefully.
+     *
+     * @param formattedMessage holds the prompt text and extra data.
+     *                         The message is CBOR (RFC 7049) encoded and has the following format:
+     *                         CBOR_MAP{ "prompt", <promptText>, "extra", <extraData> }
+     *                         The message is a CBOR encoded map (type 5) with the keys
+     *                         "prompt" and "extra". The keys are encoded as CBOR text string
+     *                         (type 3). The value <promptText> is encoded as CBOR text string
+     *                         (type 3), and the value <extraData> is encoded as CBOR byte string
+     *                         (type 2). The map must have exactly one key value pair for each of
+     *                         the keys "prompt" and "extra". Other keys are not allowed.
+     *                         The value of "prompt" is given by the proptText argument to
+     *                         IConfirmationUI::promptUserConfirmation and must not be modified
+     *                         by the implementation.
+     *                         The value of "extra" is given by the extraData argument to
+     *                         IConfirmationUI::promptUserConfirmation and must not be modified
+     *                         or interpreted by the implementation.
+     *
+     * @param confirmationToken a 32-byte HMAC-SHA256 value, computed over
+     *                          "confirmation token" || <formattedMessage>
+     *                          i.e. the literal UTF-8 encoded string "confirmation token", without
+     *                          the "", concatenated with the formatted message as returned in the
+     *                          formattedMessage argument. The HMAC is keyed with a 256-bit secret
+     *                          which is shared with Keymaster. In test mode the test key MUST be
+     *                          used (see types.hal TestModeCommands and
+     * IConfirmationUI::TEST_KEY_BYTE).
+     */
+    void result(in int error, in byte[] formattedMessage, in byte[] confirmationToken);
+}
diff --git a/confirmationui/aidl/android/hardware/confirmationui/IConfirmationUI.aidl b/confirmationui/aidl/android/hardware/confirmationui/IConfirmationUI.aidl
new file mode 100644
index 0000000..f071126
--- /dev/null
+++ b/confirmationui/aidl/android/hardware/confirmationui/IConfirmationUI.aidl
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+package android.hardware.confirmationui;
+
+import android.hardware.confirmationui.IConfirmationResultCallback;
+import android.hardware.confirmationui.UIOption;
+import android.hardware.security.keymint.HardwareAuthToken;
+
+@VintfStability
+interface IConfirmationUI {
+    // Possible Errors.
+    /**
+     * API call succeeded or the user gave approval (result callback).
+     */
+    const int OK = 0;
+    /**
+     * The user canceled the TUI (result callback).
+     */
+    const int CANCELED = 1;
+    /**
+     * IConfirmationUI::abort() was called. (result callback).
+     */
+    const int ABORTED = 2;
+    /**
+     * Cannot start another prompt.
+     */
+    const int OPERATION_PENDING = 3;
+    /**
+     * IConfirmationUI::deliverSecureInputEvent call was ignored.
+     */
+    const int IGNORED = 4;
+    /**
+     * An unexpected system error occurred.
+     */
+    const int SYSTEM_ERROR = 5;
+    /**
+     * Returned by an unimplemented API call.
+     */
+    const int UNIMPLEMENTED = 6;
+    /**
+     * This is returned when an error is diagnosed that should have been
+     * caught by earlier input sanitization. Should never be seen in production.
+     */
+    const int UNEXPECTED = 7;
+    /**
+     * General UI error.
+     */
+    const int UI_ERROR = 0x10000;
+    /**
+     * This is returned if there is no corresponding glyph for a character.
+     */
+    const int UI_ERROR_MISSING_GLYPH = 0x10001;
+    /**
+     * The implementation must return this error code on promptUserConfirmation if the
+     * resulting formatted message does not fit into MAX_MESSAGE_SIZE bytes. It is
+     * advised that the implementation formats the message upon receiving this API call to
+     * be able to diagnose this syndrome.
+     */
+    const int UI_ERROR_MESSAGE_TOO_LONG = 0x10002;
+    /**
+     * This is returned if the UTF8 encoding is malformed.
+     */
+    const int UI_ERROR_MALFORMED_UTF8ENCODING = 0x10003;
+
+    // Constants
+    /**
+     * The test key is 32byte word with all bytes set to TEST_KEY_BYTE.
+     */
+    const int TEST_KEY_BYTE = 0xA5;
+    /**
+     * This defines the maximum message size. This indirectly limits the size of the prompt text
+     * and the extra data that can be passed to the confirmation UI. The prompt text and extra data
+     * must fit in to this size including CBOR header information.
+     */
+    const int MAX_MESSAGE_SIZE = 0x1800;
+
+    /**
+     * Aborts a pending user prompt. This allows the framework to gracefully end a TUI dialog.
+     * If a TUI operation was pending the corresponding call back is informed with
+     * ErrorCode::Aborted.
+     */
+    void abort();
+
+    /**
+     * DeliverSecureInput is used by the framework to deliver a secure input event to the
+     * confirmation provider.
+     *
+     * VTS test mode:
+     * This function can be used to test certain code paths non-interactively.
+     * See TestModeCommands.aidl for details.
+     *
+     * @param secureInputToken An authentication token as generated by Android authentication
+     *                         providers.
+     */
+    void deliverSecureInputEvent(in HardwareAuthToken secureInputToken);
+
+    /**
+     * Asynchronously initiates a confirmation UI dialog prompting the user to confirm a given text.
+     * The TUI prompt must be implemented in such a way that a positive response indicates with
+     * high confidence that a user has seen the given prompt text even if the Android framework
+     * including the kernel was compromised.
+     *
+     * Service status return:
+     *
+     * OK IFF the dialog was successfully started. In this case, and only in this
+     *                      case, the implementation must, eventually, call the callback to
+     *                      indicate completion.
+     * OPERATION_PENDING is returned when the confirmation provider is currently
+     *                      in use.
+     * SYSTEM_ERROR an error occurred trying to communicate with the confirmation
+     *                      provider (e.g. trusted app).
+     * UI_ERROR the confirmation provider encountered an issue with displaying
+     *                      the prompt text to the user.
+     *
+     * @param resultCB Implementation of IResultCallback. Used by the implementation to report
+     *                 the result of the current pending user prompt.
+     *
+     * @param promptText UTF-8 encoded bytes which is to be presented to the user.
+     *
+     * @param extraData A binary blob that must be included in the formatted output message as is.
+     *                  It is opaque to the implementation. Implementations must neither interpret
+     *                  nor modify the content.
+     *
+     * @param locale String specifying the locale that must be used by the TUI dialog. The string
+     *                      is an IETF BCP 47 tag.
+     *
+     * @param uiOptions A set of uiOptions manipulating how the confirmation prompt is displayed.
+     *                  Refer to UIOption in types.hal for possible options.
+     */
+    void promptUserConfirmation(in IConfirmationResultCallback resultCB, in byte[] promptText,
+            in byte[] extraData, in @utf8InCpp String locale, in UIOption[] uiOptions);
+}
diff --git a/confirmationui/aidl/android/hardware/confirmationui/TestModeCommands.aidl b/confirmationui/aidl/android/hardware/confirmationui/TestModeCommands.aidl
new file mode 100644
index 0000000..5b1d8fb
--- /dev/null
+++ b/confirmationui/aidl/android/hardware/confirmationui/TestModeCommands.aidl
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+package android.hardware.confirmationui;
+
+/**
+ * Test mode commands.
+ *
+ * IConfirmationUI::deliverSecureInputEvent can be used to test certain code paths.
+ * To that end, the caller passes an auth token that has an HMAC keyed with the test key
+ * (see IConfirmationUI::TEST_KEY_BYTE). Implementations first check the HMAC against test key.
+ * If the test key produces a matching HMAC, the implementation evaluates the challenge field
+ * of the auth token against the values defined in TestModeCommand.
+ * If the command indicates that a confirmation token is to be generated the test key MUST be used
+ * to generate this confirmation token.
+ *
+ * See command code for individual test command descriptions.
+ */
+@VintfStability
+@Backing(type="int")
+enum TestModeCommands {
+    /**
+     * Simulates the user pressing the OK button on the UI. If no operation is pending
+     * ResponseCode::Ignored must be returned. A pending operation is finalized successfully
+     * see IConfirmationResultCallback::result, however, the test key
+     * (see IConfirmationUI::TEST_KEY_BYTE) MUST be used to generate the confirmation token.
+     */
+    OK_EVENT = 0,
+    /**
+     * Simulates the user pressing the CANCEL button on the UI. If no operation is pending
+     * Result::Ignored must be returned. A pending operation is finalized as specified in
+     * IConfirmationResultCallback.hal.
+     */
+    CANCEL_EVENT = 1,
+}
diff --git a/confirmationui/aidl/android/hardware/confirmationui/UIOption.aidl b/confirmationui/aidl/android/hardware/confirmationui/UIOption.aidl
new file mode 100644
index 0000000..b242c53
--- /dev/null
+++ b/confirmationui/aidl/android/hardware/confirmationui/UIOption.aidl
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+package android.hardware.confirmationui;
+
+/**
+ * UI modification options.
+ */
+@VintfStability
+@Backing(type="int")
+enum UIOption {
+    /**
+     * Accessibility: Requests color inverted style.
+     */
+    ACCESSIBILITY_INVERTED = 0,
+    /**
+     * Accessibility: Requests magnified style.
+     */
+    ACCESSIBILITY_MAGNIFIED = 1,
+}