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Merge changes from topic "authgraph-hal" into main am: 93439a212b am: 5fcc930ba4 am: bea03d2949

Browse source 
Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2786800

Change-Id: Ia7f66e6b00dd216a5c57478ddfe66029783a63f7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Hasini Gunasinghe 2023-11-01 17:16:15 +00:00 committed by Automerger Merge Worker
commit 0118ba7157
39 changed files with 2249 additions and 0 deletions
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8
compatibility_matrices/compatibility_matrix.9.xml
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@ -502,6 +502,14 @@
<regex-instance>SIM[1-9][0-9]*</regex-instance>
</interface>
</hal>
<hal format="aidl" optional="true" updatable-via-apex="true">
<name>android.hardware.security.authgraph</name>
<version>1</version>
<interface>
<name>IAuthGraphKeyExchange</name>
<instance>nonsecure</instance>
</interface>
</hal>
<hal format="aidl" optional="true" updatable-via-apex="true">
<name>android.hardware.security.secureclock</name>
<version>1</version>

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security/authgraph/aidl/Android.bp Normal file
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// Copyright (C) 2023 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 {
// See: http://go/android-license-faq
// A large-scale-change added 'default_applicable_licenses' to import
// all of the 'license_kinds' from "hardware_interfaces_license"
// to get the below license kinds:
// SPDX-license-identifier-Apache-2.0
default_applicable_licenses: ["hardware_interfaces_license"],
}
aidl_interface {
name: "android.hardware.security.authgraph",
vendor_available: true,
srcs: [
"android/hardware/security/authgraph/*.aidl",
],
stability: "vintf",
frozen: false,
backend: {
java: {
platform_apis: true,
},
ndk: {
apps_enabled: false,
},
rust: {
enabled: true,
apex_available: [
"//apex_available:platform",
"com.android.virt",
],
},
},
}
// cc_defaults that includes the latest Authgraph AIDL library.
// Modules that depend on Authgraph directly can include this cc_defaults to avoid
// managing dependency versions explicitly.
cc_defaults {
name: "authgraph_use_latest_hal_aidl_ndk_static",
static_libs: [
"android.hardware.security.authgraph-V1-ndk",
],
}
cc_defaults {
name: "authgraph_use_latest_hal_aidl_ndk_shared",
shared_libs: [
"android.hardware.security.authgraph-V1-ndk",
],
}
cc_defaults {
name: "authgraph_use_latest_hal_aidl_cpp_static",
static_libs: [
"android.hardware.security.authgraph-V1-cpp",
],
}
cc_defaults {
name: "authgraph_use_latest_hal_aidl_cpp_shared",
shared_libs: [
"android.hardware.security.authgraph-V1-cpp",
],
}
// A rust_defaults that includes the latest Authgraph AIDL library.
// Modules that depend on Authgraph directly can include this rust_defaults to avoid
// managing dependency versions explicitly.
rust_defaults {
name: "authgraph_use_latest_hal_aidl_rust",
rustlibs: [
"android.hardware.security.authgraph-V1-rust",
],
}

39
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/Arc.aidl Normal file
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@ -0,0 +1,39 @@
/*
* Copyright (C) 2023 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.security.authgraph;
/* @hide */
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable Arc {
byte[] arc;
}

50
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/Error.aidl Normal file
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@ -0,0 +1,50 @@
/*
* Copyright (C) 2023 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.security.authgraph;
/* @hide */
@Backing(type="int") @VintfStability
enum Error {
OK = 0,
INVALID_PEER_NONCE = (-1) /* -1 */,
INVALID_PEER_KE_KEY = (-2) /* -2 */,
INVALID_IDENTITY = (-3) /* -3 */,
INVALID_CERT_CHAIN = (-4) /* -4 */,
INVALID_SIGNATURE = (-5) /* -5 */,
INVALID_KE_KEY = (-6) /* -6 */,
INVALID_PUB_KEY_IN_KEY = (-7) /* -7 */,
INVALID_PRIV_KEY_ARC_IN_KEY = (-8) /* -8 */,
INVALID_SHARED_KEY_ARCS = (-9) /* -9 */,
MEMORY_ALLOCATION_FAILED = (-10) /* -10 */,
INCOMPATIBLE_PROTOCOL_VERSION = (-11) /* -11 */,
}

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security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/IAuthGraphKeyExchange.aidl Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (C) 2023 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.security.authgraph;
/* @hide */
@VintfStability
interface IAuthGraphKeyExchange {
android.hardware.security.authgraph.SessionInitiationInfo create();
android.hardware.security.authgraph.KeInitResult init(in android.hardware.security.authgraph.PubKey peerPubKey, in android.hardware.security.authgraph.Identity peerId, in byte[] peerNonce, in int peerVersion);
android.hardware.security.authgraph.SessionInfo finish(in android.hardware.security.authgraph.PubKey peerPubKey, in android.hardware.security.authgraph.Identity peerId, in android.hardware.security.authgraph.SessionIdSignature peerSignature, in byte[] peerNonce, in int peerVersion, in android.hardware.security.authgraph.Key ownKey);
android.hardware.security.authgraph.Arc[2] authenticationComplete(in android.hardware.security.authgraph.SessionIdSignature peerSignature, in android.hardware.security.authgraph.Arc[2] sharedKeys);
}

38
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/Identity.aidl Normal file
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@ -0,0 +1,38 @@
/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable Identity {
byte[] identity;
}

39
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/KeInitResult.aidl Normal file
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@ -0,0 +1,39 @@
/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable KeInitResult {
android.hardware.security.authgraph.SessionInitiationInfo sessionInitiationInfo;
android.hardware.security.authgraph.SessionInfo sessionInfo;
}

39
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/Key.aidl Normal file
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@ -0,0 +1,39 @@
/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable Key {
@nullable android.hardware.security.authgraph.PubKey pubKey;
@nullable android.hardware.security.authgraph.Arc arcFromPBK;
}

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security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/PlainPubKey.aidl Normal file
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@ -0,0 +1,38 @@
/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable PlainPubKey {
byte[] plainPubKey;
}

39
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/PubKey.aidl Normal file
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@ -0,0 +1,39 @@
/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
union PubKey {
android.hardware.security.authgraph.PlainPubKey plainKey;
android.hardware.security.authgraph.SignedPubKey signedKey;
}

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security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/SessionIdSignature.aidl Normal file
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@ -0,0 +1,38 @@
/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable SessionIdSignature {
byte[] signature;
}

40
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/SessionInfo.aidl Normal file
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@ -0,0 +1,40 @@
/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable SessionInfo {
android.hardware.security.authgraph.Arc[2] sharedKeys;
byte[] sessionId;
android.hardware.security.authgraph.SessionIdSignature signature;
}

41
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/SessionInitiationInfo.aidl Normal file
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/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable SessionInitiationInfo {
android.hardware.security.authgraph.Key key;
android.hardware.security.authgraph.Identity identity;
byte[] nonce;
int version;
}

38
security/authgraph/aidl/aidl_api/android.hardware.security.authgraph/current/android/hardware/security/authgraph/SignedPubKey.aidl Normal file
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/*
* Copyright (C) 2023 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.security.authgraph;
@RustDerive(Clone=true, Eq=true, PartialEq=true) @VintfStability
parcelable SignedPubKey {
byte[] signedPubKey;
}

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/*
* Copyright (C) 2023 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.security.authgraph;
/**
* This is the definition of the data format of an Arc.
* @hide
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable Arc {
/**
* The messages exchanged between the domains in the AuthGraph protocol are called Arcs.
* An arc is simply AES-GCM. Encryption of a payload P with a key K and additional
* authentication data (AAD) D: (i.e. Arc = Enc(K, P, D)).
*
* Data is CBOR-encoded according to the `Arc` CDDL definition in Arc.cddl.
*/
byte[] arc;
}

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;
; Copyright (C) 2023 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.
;
Arc = [ ; COSE_Encrypt0 [RFC9052 s5.2]
protected : bstr .cbor ArcProtectedHeaders,
unprotected : {
5 : bstr .size 12 ; IV
},
ciphertext : bstr ; Enc(K, bstr .cbor Payload, encoded ArcEncStruct)
]
ArcProtectedHeaders = {
1 : 3, ; Algorithm: AES-GCM mode w/ 256-bit key, 128-bit tag
? -70001 : { + Permission }, ; One or more Permissions
? -70002 : { + Limitation }, ; One or more Limitations
? -70003 : int, ; Timestamp in milliseconds since some starting point (generally
; the most recent device boot) which all of the applications within
; the secure domain must agree upon
? -70004 : bstr .size 16, ; Nonce used in key exchange methods
? -70005 : PayloadType, ; Payload type, if needed to disambiguate, when processing an arc
? -70006 : int, ; Version of the payload structure (if applicable)
? -70007 : int, ; Sequence number (if needed to prevent replay attacks)
? -70008 : Direction ; Direction of the encryption key (i.e. whether it is used to
; encrypt incoming messages or outgoing messages)
? -70009 : bool, ; "authentication_completed" - this is used during authenticated
; key exchange indicate whether signature verification is done
? -70010 : bstr .size 32 ; "session_id" computed during key exchange protocol
}
; Permissions indicate what an arc can be used with. Permissions are added to an arc during the
; `create()` primitive operation and are propagated during `mint` and `snap` primitive operations.
Permission = &(
-4770552 : IdentityEncoded, ; "source_id" - in the operations performed by a source, the
; source adds its own identity to the permissions of an arc.
-4770553 : IdentityEncoded, ; "sink_id" - in the operations performed by a sink, the sink
; adds its own identity to the permissions of an arc.
-4770555 : [ +IdentityEncoded ] ; "minting_allowed" - defines the set of TA identities
; to whom the payload key is allowed to be minted.
-4770556 : bool ; "deleted_on_biometric_change" - A Boolean value that
; indicates whether an auth key issued from a biometric TA is
; invalidated on new biometric enrollment or removal of all
; biometrics.
)
; Limitations indicate what restrictions are applied on the usage of an arc. Permissions are added
; to an arc during the `create` primitive operation and are propagated during `snap` primitive
; operation.
Limitation = &(
-4770554 : bstr, ; "challenge" - is added to an arc that transfers an auth key to a channel
; key, in order to ensure the freshness of the authentication.
; A challenge is issued by a sink (e.g. Keymint TA, Biometric TAs).
)
; INCLUDE Identity.cddl for: Identity
IdentityEncoded = bstr .cbor Identity
Direction = &(
In: 1,
Out: 2,
)
PayloadType = &(
SecretKey: 1,
Arc: 2,
; Any other payload types should also be defined here
)
Payload = &(
SecretKey,
Arc,
; Any other payload formats should also be defined here
)
SecretKey = &( ; One of the payload types of an Arc is a secret key
SymmetricKey,
ECPrivateKey, ; Private key of a key pair generated for key exchange
)
ECPrivateKey = { ; COSE_Key [RFC9052 s7]
1 : 2, ; Key type : EC2
3 : -25, ; Algorithm: ECDH ES w/ HKDF 256 - generate key directly
? 4 : [7], ; Key_ops: [derive key]
-1 : 1, ; Curve: P-256
? -2 : bstr, ; x coordinate
? -3 : bstr, ; y coordinate
-4 : bstr, ; private key (d)
}
SymmetricKey = { ; COSE_Key [RFC9052 s7] - For symmetric key encryption
1 : 4, ; Key type : Symmetric
3 : 3, ; Algorithm : AES-GCM mode w/ 256-bit key, 128-bit tag
4 : [ 4 ], ; Key_ops: [decrypt]
-1 : bstr .size 32, ; Key value (k)
}
ArcEncStruct = [ ; COSE_Enc_structure [RFC9052 s5.3]
context : "Encrypt0",
protected : bstr .cbor ArcProtectedHeaders,
external_aad : bstr .size 0,
]
; INCLUDE generateCertificateRequestV2.cddl for: PubKeyEd25519, PubKeyECDSA256, PubKeyECDSA384
; from hardware/interfaces/security/rkp/aidl/android/hardware/security/keymint/

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;
; Copyright (C) 2023 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.
;
DicePolicy = [
1, ; dice policy version
+ nodeConstraintList ; for each entry in dice chain
]
nodeConstraintList = [
* nodeConstraint
]
; We may add a hashConstraint item later
nodeConstraint = exactMatchConstraint / geConstraint
exactMatchConstraint = [1, keySpec, value]
geConstraint = [2, keySpec, int]
keySpec = [value+]
value = bool / int / tstr / bstr

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/*
* Copyright (C) 2023 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.security.authgraph;
/**
* AuthGraph error codes. Aidl will return these error codes as service specific errors in
* EX_SERVICE_SPECIFIC.
* @hide
*/
@VintfStability
@Backing(type="int")
enum Error {
/* Success */
OK = 0,
/* Invalid peer nonce for key exchange */
INVALID_PEER_NONCE = -1,
/* Invalid key exchange public key by the peer */
INVALID_PEER_KE_KEY = -2,
/* Invalid identity of the peer */
INVALID_IDENTITY = -3,
/* Invalid certificate chain in the identity of the peer */
INVALID_CERT_CHAIN = -4,
/* Invalid signature by the peer */
INVALID_SIGNATURE = -5,
/* Invalid key exchange key created by a particular party themselves to be used as a handle */
INVALID_KE_KEY = -6,
/* Invalid public key in the `Key` struct */
INVALID_PUB_KEY_IN_KEY = -7,
/* Invalid private key arc in the `Key` struct */
INVALID_PRIV_KEY_ARC_IN_KEY = -8,
/* Invalid shared key arcs */
INVALID_SHARED_KEY_ARCS = -9,
/* Memory allocation failed */
MEMORY_ALLOCATION_FAILED = -10,
/* The protocol version negotiated with the sink is incompatible */
INCOMPATIBLE_PROTOCOL_VERSION = -11,
}

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;
; Copyright (C) 2023 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.
;
ExplicitKeyDiceCertChain = [
1, ; version, hopefully will never change
DiceCertChainInitialPayload,
* DiceChainEntry
]
DiceCertChainInitialPayload = {
-4670552 : bstr .cbor PubKeyEd25519 /
bstr .cbor PubKeyECDSA256 /
bstr .cbor PubKeyECDSA384 ; subjectPublicKey
}
; INCLUDE generateCertificateRequestV2.cddl for: PubKeyEd25519, PubKeyECDSA256, PubKeyECDSA384,
; DiceChainEntry
; from hardware/interfaces/security/rkp/aidl/android/hardware/security/keymint/

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/*
* Copyright (C) 2023 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.security.authgraph;
import android.hardware.security.authgraph.Arc;
import android.hardware.security.authgraph.Identity;
import android.hardware.security.authgraph.KeInitResult;
import android.hardware.security.authgraph.Key;
import android.hardware.security.authgraph.PubKey;
import android.hardware.security.authgraph.SessionIdSignature;
import android.hardware.security.authgraph.SessionInfo;
import android.hardware.security.authgraph.SessionInitiationInfo;
/**
* AuthGraph interface definition for authenticated key exchange between two parties: P1 (source)
* and P2 (sink).
* Pre-requisites: each participant should have a:
* 1. Persistent identity - e.g. a signing key pair with a self signed certificate or a DICE
* certificate chain.
* 2. A symmetric encryption key kept in memory with per-boot life time of the participant
* (a.k.a per-boot key)
*
* ErrorCodes are defined in android.hardware.security.authgraph.ErrorCode.aidl.
* @hide
*/
@VintfStability
interface IAuthGraphKeyExchange {
/**
* This method is invoked on P1 (source).
* Create an ephermeral EC key pair on NIST curve P-256 and a nonce (of 16 bytes) for
* key exchange.
*
* @return SessionInitiationInfo including the `Key` containing the public key of the created
* key pair and an arc from the per-boot key to the private key, the nonce, the persistent
* identity and the latest protocol version (i.e. AIDL version) supported.
*
* Note: The arc from the per-boot key to the private key in `Key` of the return type:
* `SessionInitiationInfo` serves two purposes:
* i. A mapping to correlate `create` and `finish` calls to P1 in a particular instance of the
* key exchange protocol.
* ii.A way to minimize the in-memory storage (P1 can include the nonce in the protected headers
* of the arc).
* However, P1 should maintain some form of in-memory record to be able to verify that the input
* `Key` sent to `finish` is from an unfinished instance of a key exchange protocol, to prevent
* any replay attacks in `finish`.
*/
SessionInitiationInfo create();
/**
* This method is invoked on P2 (sink).
* Perform the following steps for key exchange:
* 0. If either `peerPubKey`, `peerId`, `peerNonce` is not in the expected format, return
* errors: INVALID_PEER_KE_KEY, INVALID_IDENTITY, INVALID_PEER_NONCE respectively.
* 1. Create an ephemeral EC key pair on NIST curve P-256.
* 2. Create a nonce (of 16 bytes).
* 3. Compute the diffie-hellman shared secret: Z.
* 4. Compute a salt = bstr .cbor [
* source_version: int, ; from input `peerVersion`
* sink_pub_key: bstr .cbor PlainPubKey, ; from step #1
* source_pub_key: bstr .cbor PlainPubKey, ; from input `peerPubKey`
* sink_nonce: bstr .size 16, ; from step #2
* source_nonce: bstr .size 16, ; from input `peerNonce`
* sink_cert_chain: bstr .cbor ExplicitKeyDiceCertChain, ; from own identity
* source_cert_chain: bstr .cbor ExplicitKeyDiceCertChain, ; from input `peerId`
* ]
* 5. Extract a cryptographic secret S from Z, using the salt from #4 above.
* 6. Derive two symmetric encryption keys of 256 bits with:
* i. b"KE_ENCRYPTION_KEY_SOURCE_TO_SINK" as context for the key used to encrypt incoming
* messages
* ii. b"KE_ENCRYPTION_KEY_SINK_TO_SOURCE" as context for the key used to encrypt outgoing
* messages
* 7. Create arcs from the per-boot key to each of the two shared keys from step #6 and
* mark authentication_complete = false in arcs' protected headers.
* 8. Derive a MAC key with b"KE_HMAC_KEY" as the context.
* 9. Compute session_id_input = bstr .cbor [
* sink_nonce: bstr .size 16,
* source_nonce: bstr .size 16,
* ],
* 10.Compute a session_id as a 256 bits HMAC over the session_id_input from step#9 with
* the key from step #8.
* 11.Create a signature over the session_id from step #10, using the signing key which is
* part of the party's identity.
*
* @param peerPubKey - the public key of the key pair created by the peer (P1) for key exchange
*
* @param peerId - the persistent identity of the peer
*
* @param peerNonce - nonce created by the peer
*
* @param peerVersion - an integer representing the latest protocol version (i.e. AIDL version)
* supported by the peer
*
* @return KeInitResult including the `Key` containing the public key of the created key pair,
* the nonce, the persistent identity, two shared key arcs from step #7, session id, signature
* over the session id and the negotiated protocol version. The negotiated protocol version
* should be less than or equal to the peer's version.
*
* Note: The two shared key arcs in the return type: `KeInitResult` serves two purposes:
* i. A mapping to correlate `init` and `authenticationComplete` calls to P2 in a particular
* instance of the key exchange protocol.
* ii.A way to minimize the in-memory storage of P2 allocated for key exchange.
* However, P2 should maintain some in-memory record to be able to verify that the input
* `sharedkeys` sent to `authenticationComplete` and to any subsequent AuthGraph protocol
* methods are valid shared keys agreed with the party identified by `peerId`, to prevent
* any replay attacks in `authenticationComplete` and in any subsequent AuthGraph protocol
* methods which use the shared keys to encrypt the secret messages.
*/
KeInitResult init(
in PubKey peerPubKey, in Identity peerId, in byte[] peerNonce, in int peerVersion);
/**
* This method is invoked on P1 (source).
* Perform the following steps:
* 0. If either `peerPubKey`, `peerId`, `peerNonce` is not in the expected format, return
* errors: INVALID_PEER_KE_KEY, INVALID_IDENTITY, INVALID_PEER_NONCE respectively. If
* `peerVersion` is greater than the version advertised in `create`, return error:
* INCOMPATIBLE_PROTOCOL_VERSION.
* If `ownKey` is not in the in-memory records for unfinished instances of a key
* exchange protocol, return error: INVALID_KE_KEY. Similarly, if the public key or the
* arc containing the private key in `ownKey` is invalid, return INVALID_PUB_KEY_IN_KEY
* and INVALID_PRIV_KEY_ARC_IN_KEY respectively.
* 1. Compute the diffie-hellman shared secret: Z.
* 2. Compute a salt = bstr .cbor [
* source_version: int, ; the protocol version used in `create`
* sink_pub_key: bstr .cbor PlainPubKey, ; from input `peerPubKey`
* source_pub_key: bstr .cbor PlainPubKey, ; from the output of `create`
* sink_nonce: bstr .size 16, ; from input `peerNonce`
* source_nonce: bstr .size 16, ; from the output of `create`
* sink_cert_chain: bstr .cbor ExplicitKeyDiceCertChain, ; from input `peerId`
* source_cert_chain: bstr .cbor ExplicitKeyDiceCertChain, ; from own identity
* ]
* 3. Extract a cryptographic secret S from Z, using the salt from #2 above.
* 4. Derive two symmetric encryption keys of 256 bits with:
* i. b"KE_ENCRYPTION_KEY_SOURCE_TO_SINK" as context for the key used to encrypt outgoing
* messages
* ii. b"KE_ENCRYPTION_KEY_SINK_TO_SOURCE" as context for the key used to encrypt incoming
* messages
* 5. Derive a MAC key with b"KE_HMAC_KEY" as the context.
* 6. Compute session_id_input = bstr .cbor [
* sink_nonce: bstr .size 16,
* source_nonce: bstr .size 16,
* ],
* 7. Compute a session_id as a 256 bits HMAC over the session_id_input from step #6 with
* the key from step #5.
* 8. Verify the peer's signature over the session_id from step #7. If successful, proceed,
* otherwise, return error: INVALID_SIGNATURE.
* 9. Create arcs from the per-boot key to each of the two shared keys from step #4 and
* mark authentication_complete = true in arcs' protected headers.
* 10.Create a signature over the session_id from step #7, using the signing key which is
* part of the party's identity.
*
* @param peerPubKey - the public key of the key pair created by the peer (P2) for key exchange
*
* @param peerId - the persistent identity of the peer
*
* @param peerSignature - the signature created by the peer over the session id computed by the
* peer
*
* @param peerNonce - nonce created by the peer
*
* @param peerVersion - an integer representing the protocol version (i.e. AIDL version)
* negotiated with the peer
*
* @param ownKey - the key created by P1 (source) in `create()` for key exchange
*
* @return SessionInfo including the two shared key arcs from step #9, session id and the
* signature over the session id.
*
* Note: The two shared key arcs in the return type: `SessionInfo` serves two purposes:
* i. A mapping to correlate the key exchange protocol taken place with a particular peer and
* subsequent AuthGraph protocols execued with the same peer.
* ii.A way to minimize the in-memory storage for shared keys.
* However, P1 should maintain some in-memory record to be able to verify that the shared key
* arcs sent to any subsequent AuthGraph protocol methods are valid shared keys agreed with the
* party identified by `peerId`, to prevent any replay attacks.
*/
SessionInfo finish(in PubKey peerPubKey, in Identity peerId,
in SessionIdSignature peerSignature, in byte[] peerNonce, in int peerVersion,
in Key ownKey);
/**
* This method is invoked on P2 (sink).
* Perform the following steps:
* 0. If input `sharedKeys` is invalid (i.e. they cannot be decrypted with P2's per-boot key
* or they are not in P2's in-memory records as valid shared keys agreed with the party
* identified by `peerId`), return error: INVALID_SHARED_KEY_ARCS.
* 1. Verify that both shared key arcs have the same session id and peer identity.
* 2. Verify the peer's signature over the session id attached to the shared key arcs'
* headers. If successful, proceed, otherwise, return error: INVALID_SIGNATURE.
* 3. Mark authentication_complete = true in the shared key arcs' headers
*
* @param peerSignature - the signature created by the peer over the session id computed by the
* peer
*
* @param sharedKeys - two shared key arcs created by P2 in `init`. P2 obtains from the arcs'
* protected headers, the session id and the peer's identity to verify the
* peer's signature over the session id.
*
* @return Arc[] - an array of two updated shared key arcs
*/
Arc[2] authenticationComplete(in SessionIdSignature peerSignature, in Arc[2] sharedKeys);
}

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/*
* Copyright (C) 2023 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.security.authgraph;
/**
* Persistent (versioned) identity of a participant of Authgraph key exchange.
* Identity consists of two main parts:
* 1. a certificate chain (e.g. a DICE certificate chain)
* 2. (optional) a policy specifying how to verify the certificate chain - if a policy is not
* provided, a simple byte-to-byte comparison of the certificate chain is assumed.
*
* During identity verification, the certificate chain of the identity attached to the access
* request is compared against the policy of the identity attached to the persistent resources.
*
* The usage of policy based identity verification in Authgraph is three-fold:
* 1. Retain access to persistent resources for the newer versions of the party who
* created them, even when parts of the certificate chain are updated in the new version.
* 2. Deny access to the new persistent resources for the older versions of the party
* who created the new persistent resources.
* 3. Trigger rotation of critical keys encrypted in persistent arcs created by the previous
* version of the party, by including an updated policy in the identity attached to the
* access request.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable Identity {
/* Data is CBOR-encoded according to the `Identity` CDDL definition in Identity.cddl */
byte[] identity;
}

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;
; Copyright (C) 2023 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.
;
Identity = [
1, ; Version
cert_chain: bstr .cbor ExplicitKeyDiceCertChain,
policy: bstr .cbor DicePolicy / nil,
]
; INCLUDE ExplicitKeyDiceCertChain.cddl for: ExplicitKeyDiceCertChain
; INCLUDE DicePolicy.cddl for: DicePolicy

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/*
* Copyright (C) 2023 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.security.authgraph;
import android.hardware.security.authgraph.SessionInfo;
import android.hardware.security.authgraph.SessionInitiationInfo;
/**
* The return type for the init() step of authenticated key exchange.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable KeInitResult {
/**
* Session initiation information.
*/
SessionInitiationInfo sessionInitiationInfo;
/**
* Session information.
*/
SessionInfo sessionInfo;
}

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/*
* Copyright (C) 2023 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.security.authgraph;
import android.hardware.security.authgraph.Arc;
import android.hardware.security.authgraph.PubKey;
/**
* The type that encapsulates a key. Key can be either a symmetric key or an asymmetric key.
* If it is an asymmetric key, it is used for key exchange.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable Key {
/**
* If the Key is an asymmetric key, public key should be present.
*/
@nullable PubKey pubKey;
/**
* Arc from the per-boot key to the payload key. The payload key is either the symmetric key
* or the private key of an asymmetric key, based on the type of the key being created.
* This is marked as optional because there are instances where only the public key is returned,
* e.g. `init` method in the key exchange protocol.
*/
@nullable Arc arcFromPBK;
}

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/*
* Copyright (C) 2023 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.security.authgraph;
/**
* One of the two enum variants of the enum type: `PubKey`. This represents the plain public key
* material encoded as a COSE_Key.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable PlainPubKey {
/* Data is CBOR-encoded according to the `PlainPubKey` CDDL definition in PlainPubKey.cddl */
byte[] plainPubKey;
}

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;
; Copyright (C) 2023 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.
;
; P-256 public key for key exchange.
PlainPubKey = [ ; COSE_Key [RFC9052 s7]
1 : 2, ; Key type : EC2
3 : -27, ; Algorithm : ECDH-SS + HKDF-256
-1 : 1, ; Curve: P256
-2 : bstr, ; X coordinate, big-endian
-3 : bstr ; Y coordinate, big-endian
]

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/*
* Copyright (C) 2023 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.security.authgraph;
import android.hardware.security.authgraph.PlainPubKey;
import android.hardware.security.authgraph.SignedPubKey;
/**
* The enum type representing the public key of an asymmetric key pair.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
union PubKey {
/**
* Plain public key material encoded as a COSE_Key.
*/
PlainPubKey plainKey;
/**
* Public key signed with the long term signing key of the party.
*/
SignedPubKey signedKey;
}

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/*
* Copyright (C) 2023 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.security.authgraph;
/**
* Signature computed by a party over the session id during authenticated key exchange.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable SessionIdSignature {
/* Data is CBOR-encoded according to the `SessionIdSignature` CDDL definition in
* SessionIdSignature.cddl */
byte[] signature;
}

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;
; Copyright (C) 2023 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.
;
SessionIdSignature = [ ; COSE_Sign1 (untagged) [RFC9052 s4.2]
protected: bstr .cbor SessionIdSignatureProtected,
unprotected: {},
payload: nil, ; session ID payload to be transported separately
signature: bstr ; PureEd25519(privateKey, SessionIdSignatureSigStruct) /
; ECDSA(privateKey, SessionIdSignatureSigStruct)
]
SessionIdSignatureProtected = {
1 : AlgorithmEdDSA / AlgorithmES256,
}
SessionIdSignatureSigStruct = [ ; Sig_structure for SessionIdSignature [ RFC9052 s4.4]
context: "Signature1",
protected: bstr SessionIdSignatureProtected,
external_aad: bstr .size 0,
payload: bstr, ; session ID payload provided separately
]

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/*
* Copyright (C) 2023 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.security.authgraph;
import android.hardware.security.authgraph.Arc;
import android.hardware.security.authgraph.SessionIdSignature;
/**
* Session information returned as part of authenticated key exchange.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable SessionInfo {
/**
* The arcs that encrypt the two derived symmetric encryption keys (for two-way communication)
* from the party's per-boot key.
*/
Arc[2] sharedKeys;
/**
* The value of the session id computed by the two parties during the authenticate key
* exchange. Apart from the usage of the session id by the two peers, session id is also useful
* to verify (by a third party) that the key exchange was successful.
*/
byte[] sessionId;
/**
* The signature over the session id, created by the party who computed the session id.
*
* If there is one or more `DiceChainEntry` in the `ExplicitKeyDiceCertChain` of the party's
* identity, the signature is verified with the public key in the leaf of the chain of
* DiceChainEntries (i.e the public key in the last of the array of DiceChainEntries).
* Otherwise, the signature is verified with the `DiceCertChainInitialPayload`.
*/
SessionIdSignature signature;
}

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/*
* Copyright (C) 2023 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.security.authgraph;
import android.hardware.security.authgraph.Arc;
import android.hardware.security.authgraph.Identity;
import android.hardware.security.authgraph.Key;
/**
* Session initiation information returned as part of authenticated key exchange.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable SessionInitiationInfo {
/**
* An ephemeral EC key created for the ECDH process.
*/
Key key;
/**
* The identity of the party who created the Diffie-Hellman key exchange key.
*/
Identity identity;
/**
* Nonce value specific to this session. The nonce serves three purposes:
* 1. freshness of key exchange
* 2. creating a session id (a publicly known value related to the exchanged keys)
* 3. usage as salt into the HKDF-EXTRACT function during key derivation from the shared DH key
*/
byte[] nonce;
/**
* The protocol version (i.e. AIDL version) - This is used to prevent version downgrade attacks
* as follows:
* 1. In `create`, the source advertises the latest protocol version supported by the source,
* which is given as input to the `init` call on the sink in the input parameter:
* `peerVersion`.
* 2. In `init`, the sink includes the `peerVersion` in the inputs to the derivation of the
* shared keys. Then the sink returns the latest protocol version supported by the sink,
* which is given as input to the `finish` call on the source in the input parameter:
* `peerVersion`.
* 3. In `finish`, the source first checks whether the sink's version is equal or less than the
* source's version and includes in the source's version in the inputs to the derivation of
* the shared keys.
* Analysis: if an attacker-in-the-middle wanted the two parties to use an older (vulnerable)
* version of the protocol, they can invoke `init` with a version that is lower than the version
* advertised by the source in `create`. However, since both parties include the source's
* version in the inputs to the derivation of the shared keys, the two parties won't end up with
* the same shared keys in the presence of such an attack. This is detected when checking the
* signature on the session id in `finish`, at which point the protocol aborts. Therefore,
* an attacker cannot successfully launch a version downgrade attack on this protocol.
*/
int version;
}

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/*
* Copyright (C) 2023 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.security.authgraph;
/**
* One of the two enum variants of the enum type: `PubKey`. This represents the public key signed
* with the long term signing key of the party.
*/
@VintfStability
@RustDerive(Clone=true, Eq=true, PartialEq=true)
parcelable SignedPubKey {
/* Data is CBOR-encoded according to the `SignedPubKey` CDDL definition in SignedPubKey.cddl */
byte[] signedPubKey;
}

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;
; Copyright (C) 2023 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.
;
SignedPubKey = [ ; COSE_Sign1 (untagged) [RFC9052 s4.2]
protected: bstr .cbor SignedPubKeyProtected,
unprotected: {},
payload: bstr .cbor PlainPubKey,
signature: bstr ; PureEd25519(privateKey, SignedPubKeySigStruct) /
; ECDSA(privateKey, SignedPubKeySigStruct)
]
SignedPubKeyProtected = {
1 : AlgorithmEdDSA / AlgorithmES256,
? -70011 : Identity, ; the party who performs the signing operation adds its own
; identity to the protected headers.
}
SignedPubKeySigStruct = [ ; Sig_structure for SignedPubKey [ RFC9052 s4.4]
context: "Signature1",
protected: bstr SignedPubKeyProtected,
external_aad: bstr .size 0,
payload: bstr .cbor PlainPubKey,
]
AlgorithmES256 = -7 ; [RFC9053 s2.1]
AlgorithmEdDSA = -8 ; [RFC9053 s2.2]
; INCLUDE PlainPubKey.cddl for: PlainPubKey
; INCLUDE Identity.cddl for: Identity

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//
// Copyright (C) 2023 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 {
// See: http://go/android-license-faq
// A large-scale-change added 'default_applicable_licenses' to import
// all of the 'license_kinds' from "hardware_interfaces_license"
// to get the below license kinds:
// SPDX-license-identifier-Apache-2.0
default_applicable_licenses: ["hardware_interfaces_license"],
}
cc_test {
name: "VtsAidlAuthGraphSessionTest",
defaults: [
"VtsHalTargetTestDefaults",
"authgraph_use_latest_hal_aidl_ndk_static",
"use_libaidlvintf_gtest_helper_static",
],
cflags: [
"-Wall",
"-Wextra",
],
srcs: [
"AuthGraphSessionTest.cpp",
],
shared_libs: [
"libbinder_ndk",
"libcrypto",
],
test_suites: [
"general-tests",
"vts",
],
}

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/*
* Copyright (C) 2023 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.
*/
#define LOG_TAG "authgraph_session_test"
#include <android-base/logging.h>
#include <aidl/Gtest.h>
#include <aidl/Vintf.h>
#include <aidl/android/hardware/security/authgraph/Error.h>
#include <aidl/android/hardware/security/authgraph/IAuthGraphKeyExchange.h>
#include <android/binder_manager.h>
#include <binder/ProcessState.h>
#include <gtest/gtest.h>
#include <vector>
namespace aidl::android::hardware::security::authgraph::test {
using ::aidl::android::hardware::security::authgraph::Error;
namespace {
// Check that the signature in the encoded COSE_Sign1 data is correct, and that the payload matches.
// TODO: maybe drop separate payload, and extract it from cose_sign1.payload (and return it).
void CheckSignature(std::vector<uint8_t>& /*pub_cose_key*/, std::vector<uint8_t>& /*payload*/,
std::vector<uint8_t>& /*cose_sign1*/) {
// TODO: implement me
}
void CheckSignature(std::vector<uint8_t>& pub_cose_key, std::vector<uint8_t>& payload,
SessionIdSignature& signature) {
return CheckSignature(pub_cose_key, payload, signature.signature);
}
std::vector<uint8_t> SigningKeyFromIdentity(const Identity& identity) {
// TODO: This is a CBOR-encoded `Identity` which currently happens to be a COSE_Key with the
// pubkey This will change in future.
return identity.identity;
}
} // namespace
class AuthGraphSessionTest : public ::testing::TestWithParam<std::string> {
public:
enum ErrorType { AIDL_ERROR, BINDER_ERROR };
union ErrorValue {
Error aidl_error;
int32_t binder_error;
};
struct ReturnedError {
ErrorType err_type;
ErrorValue err_val;
friend bool operator==(const ReturnedError& lhs, const ReturnedError& rhs) {
return lhs.err_type == rhs.err_type;
switch (lhs.err_type) {
case ErrorType::AIDL_ERROR:
return lhs.err_val.aidl_error == rhs.err_val.aidl_error;
case ErrorType::BINDER_ERROR:
return lhs.err_val.binder_error == rhs.err_val.binder_error;
}
}
};
const ReturnedError OK = {.err_type = ErrorType::AIDL_ERROR, .err_val.aidl_error = Error::OK};
ReturnedError GetReturnError(const ::ndk::ScopedAStatus& result) {
if (result.isOk()) {
return OK;
}
int32_t exception_code = result.getExceptionCode();
int32_t error_code = result.getServiceSpecificError();
if (exception_code == EX_SERVICE_SPECIFIC && error_code != 0) {
ReturnedError re = {.err_type = ErrorType::AIDL_ERROR,
.err_val.aidl_error = static_cast<Error>(error_code)};
return re;
}
ReturnedError re = {.err_type = ErrorType::BINDER_ERROR,
.err_val.binder_error = exception_code};
return re;
}
// Build the parameters for the VTS test by enumerating the available HAL instances
static std::vector<std::string> build_params() {
auto params = ::android::getAidlHalInstanceNames(IAuthGraphKeyExchange::descriptor);
return params;
}
void SetUp() override {
ASSERT_TRUE(AServiceManager_isDeclared(GetParam().c_str()))
<< "No instance declared for " << GetParam();
::ndk::SpAIBinder binder(AServiceManager_waitForService(GetParam().c_str()));
authNode_ = IAuthGraphKeyExchange::fromBinder(binder);
ASSERT_NE(authNode_, nullptr) << "Failed to get Binder reference for " << GetParam();
}
void TearDown() override {}
protected:
std::shared_ptr<IAuthGraphKeyExchange> authNode_;
};
TEST_P(AuthGraphSessionTest, Mainline) {
std::shared_ptr<IAuthGraphKeyExchange> source = authNode_;
std::shared_ptr<IAuthGraphKeyExchange> sink = authNode_;
// Step 1: create an ephemeral ECDH key at the source.
SessionInitiationInfo source_init_info;
ASSERT_EQ(OK, GetReturnError(source->create(&source_init_info)));
ASSERT_TRUE(source_init_info.key.pubKey.has_value());
ASSERT_TRUE(source_init_info.key.arcFromPBK.has_value());
// Step 2: pass the source's ECDH public key and other session info to the sink.
KeInitResult init_result;
ASSERT_EQ(OK, GetReturnError(sink->init(source_init_info.key.pubKey.value(),
source_init_info.identity, source_init_info.nonce,
source_init_info.version, &init_result)));
SessionInitiationInfo sink_init_info = init_result.sessionInitiationInfo;
ASSERT_TRUE(sink_init_info.key.pubKey.has_value());
// The sink_init_info.arcFromPBK need not be populated, as the ephemeral key agreement
// key is no longer needed.
SessionInfo sink_info = init_result.sessionInfo;
ASSERT_EQ((int)sink_info.sharedKeys.size(), 2) << "Expect two symmetric keys from init()";
ASSERT_GT((int)sink_info.sessionId.size(), 0) << "Expect non-empty session ID from sink";
std::vector<uint8_t> sink_signing_key = SigningKeyFromIdentity(sink_init_info.identity);
CheckSignature(sink_signing_key, sink_info.sessionId, sink_info.signature);
// Step 3: pass the sink's ECDH public key and other session info to the source, so it can
// calculate the same pair of symmetric keys.
SessionInfo source_info;
ASSERT_EQ(OK, GetReturnError(source->finish(sink_init_info.key.pubKey.value(),
sink_init_info.identity, sink_info.signature,
sink_init_info.nonce, sink_init_info.version,
source_init_info.key, &source_info)));
ASSERT_EQ((int)source_info.sharedKeys.size(), 2) << "Expect two symmetric keys from finsh()";
ASSERT_GT((int)source_info.sessionId.size(), 0) << "Expect non-empty session ID from source";
std::vector<uint8_t> source_signing_key = SigningKeyFromIdentity(source_init_info.identity);
CheckSignature(source_signing_key, source_info.sessionId, source_info.signature);
// Both ends should agree on the session ID.
ASSERT_EQ(source_info.sessionId, sink_info.sessionId);
// Step 4: pass the source's session ID info back to the sink, so it can check it and
// update the symmetric keys so they're marked as authentication complete.
std::array<Arc, 2> auth_complete_result;
ASSERT_EQ(OK, GetReturnError(sink->authenticationComplete(
source_info.signature, sink_info.sharedKeys, &auth_complete_result)));
ASSERT_EQ((int)auth_complete_result.size(), 2)
<< "Expect two symmetric keys from authComplete()";
sink_info.sharedKeys = auth_complete_result;
// At this point the sink and source have agreed on the same pair of symmetric keys,
// encoded as `sink_info.sharedKeys` and `source_info.sharedKeys`.
}
TEST_P(AuthGraphSessionTest, ParallelSink) {
std::shared_ptr<IAuthGraphKeyExchange> source = authNode_;
std::shared_ptr<IAuthGraphKeyExchange> sink1 = authNode_;
std::shared_ptr<IAuthGraphKeyExchange> sink2 = authNode_;
// Step 1: create ephemeral ECDH keys at the source.
SessionInitiationInfo source_init1_info;
ASSERT_EQ(OK, GetReturnError(source->create(&source_init1_info)));
ASSERT_TRUE(source_init1_info.key.pubKey.has_value());
ASSERT_TRUE(source_init1_info.key.arcFromPBK.has_value());
SessionInitiationInfo source_init2_info;
ASSERT_EQ(OK, GetReturnError(source->create(&source_init2_info)));
ASSERT_TRUE(source_init2_info.key.pubKey.has_value());
ASSERT_TRUE(source_init2_info.key.arcFromPBK.has_value());
// Step 2: pass the source's ECDH public keys and other session info to the sinks.
KeInitResult init1_result;
ASSERT_EQ(OK, GetReturnError(sink1->init(source_init1_info.key.pubKey.value(),
source_init1_info.identity, source_init1_info.nonce,
source_init1_info.version, &init1_result)));
SessionInitiationInfo sink1_init_info = init1_result.sessionInitiationInfo;
ASSERT_TRUE(sink1_init_info.key.pubKey.has_value());
SessionInfo sink1_info = init1_result.sessionInfo;
ASSERT_EQ((int)sink1_info.sharedKeys.size(), 2) << "Expect two symmetric keys from init()";
ASSERT_GT((int)sink1_info.sessionId.size(), 0) << "Expect non-empty session ID from sink";
std::vector<uint8_t> sink1_signing_key = SigningKeyFromIdentity(sink1_init_info.identity);
CheckSignature(sink1_signing_key, sink1_info.sessionId, sink1_info.signature);
KeInitResult init2_result;
ASSERT_EQ(OK, GetReturnError(sink2->init(source_init2_info.key.pubKey.value(),
source_init2_info.identity, source_init2_info.nonce,
source_init2_info.version, &init2_result)));
SessionInitiationInfo sink2_init_info = init2_result.sessionInitiationInfo;
ASSERT_TRUE(sink2_init_info.key.pubKey.has_value());
SessionInfo sink2_info = init2_result.sessionInfo;
ASSERT_EQ((int)sink2_info.sharedKeys.size(), 2) << "Expect two symmetric keys from init()";
ASSERT_GT((int)sink2_info.sessionId.size(), 0) << "Expect non-empty session ID from sink";
std::vector<uint8_t> sink2_signing_key = SigningKeyFromIdentity(sink2_init_info.identity);
CheckSignature(sink2_signing_key, sink2_info.sessionId, sink2_info.signature);
// Step 3: pass each sink's ECDH public key and other session info to the source, so it can
// calculate the same pair of symmetric keys.
SessionInfo source_info1;
ASSERT_EQ(OK, GetReturnError(source->finish(sink1_init_info.key.pubKey.value(),
sink1_init_info.identity, sink1_info.signature,
sink1_init_info.nonce, sink1_init_info.version,
source_init1_info.key, &source_info1)));
ASSERT_EQ((int)source_info1.sharedKeys.size(), 2) << "Expect two symmetric keys from finsh()";
ASSERT_GT((int)source_info1.sessionId.size(), 0) << "Expect non-empty session ID from source";
std::vector<uint8_t> source_signing_key1 = SigningKeyFromIdentity(source_init1_info.identity);
CheckSignature(source_signing_key1, source_info1.sessionId, source_info1.signature);
SessionInfo source_info2;
ASSERT_EQ(OK, GetReturnError(source->finish(sink2_init_info.key.pubKey.value(),
sink2_init_info.identity, sink2_info.signature,
sink2_init_info.nonce, sink2_init_info.version,
source_init2_info.key, &source_info2)));
ASSERT_EQ((int)source_info2.sharedKeys.size(), 2) << "Expect two symmetric keys from finsh()";
ASSERT_GT((int)source_info2.sessionId.size(), 0) << "Expect non-empty session ID from source";
std::vector<uint8_t> source_signing_key2 = SigningKeyFromIdentity(source_init2_info.identity);
CheckSignature(source_signing_key2, source_info2.sessionId, source_info2.signature);
// Both ends should agree on the session ID.
ASSERT_EQ(source_info1.sessionId, sink1_info.sessionId);
ASSERT_EQ(source_info2.sessionId, sink2_info.sessionId);
// Step 4: pass the source's session ID info back to the sink, so it can check it and
// update the symmetric keys so they're marked as authentication complete.
std::array<Arc, 2> auth_complete_result1;
ASSERT_EQ(OK, GetReturnError(sink1->authenticationComplete(
source_info1.signature, sink1_info.sharedKeys, &auth_complete_result1)));
ASSERT_EQ((int)auth_complete_result1.size(), 2)
<< "Expect two symmetric keys from authComplete()";
sink1_info.sharedKeys = auth_complete_result1;
std::array<Arc, 2> auth_complete_result2;
ASSERT_EQ(OK, GetReturnError(sink2->authenticationComplete(
source_info2.signature, sink2_info.sharedKeys, &auth_complete_result2)));
ASSERT_EQ((int)auth_complete_result2.size(), 2)
<< "Expect two symmetric keys from authComplete()";
sink2_info.sharedKeys = auth_complete_result2;
}
TEST_P(AuthGraphSessionTest, ParallelSource) {
std::shared_ptr<IAuthGraphKeyExchange> source1 = authNode_;
std::shared_ptr<IAuthGraphKeyExchange> source2 = authNode_;
std::shared_ptr<IAuthGraphKeyExchange> sink = authNode_;
// Step 1: create an ephemeral ECDH key at each of the sources.
SessionInitiationInfo source1_init_info;
ASSERT_EQ(OK, GetReturnError(source1->create(&source1_init_info)));
ASSERT_TRUE(source1_init_info.key.pubKey.has_value());
ASSERT_TRUE(source1_init_info.key.arcFromPBK.has_value());
SessionInitiationInfo source2_init_info;
ASSERT_EQ(OK, GetReturnError(source1->create(&source2_init_info)));
ASSERT_TRUE(source2_init_info.key.pubKey.has_value());
ASSERT_TRUE(source2_init_info.key.arcFromPBK.has_value());
// Step 2: pass each source's ECDH public key and other session info to the sink.
KeInitResult init1_result;
ASSERT_EQ(OK, GetReturnError(sink->init(source1_init_info.key.pubKey.value(),
source1_init_info.identity, source1_init_info.nonce,
source1_init_info.version, &init1_result)));
SessionInitiationInfo sink_init1_info = init1_result.sessionInitiationInfo;
ASSERT_TRUE(sink_init1_info.key.pubKey.has_value());
SessionInfo sink_info1 = init1_result.sessionInfo;
ASSERT_EQ((int)sink_info1.sharedKeys.size(), 2) << "Expect two symmetric keys from init()";
ASSERT_GT((int)sink_info1.sessionId.size(), 0) << "Expect non-empty session ID from sink";
std::vector<uint8_t> sink_signing_key1 = SigningKeyFromIdentity(sink_init1_info.identity);
CheckSignature(sink_signing_key1, sink_info1.sessionId, sink_info1.signature);
KeInitResult init2_result;
ASSERT_EQ(OK, GetReturnError(sink->init(source2_init_info.key.pubKey.value(),
source2_init_info.identity, source2_init_info.nonce,
source2_init_info.version, &init2_result)));
SessionInitiationInfo sink_init2_info = init2_result.sessionInitiationInfo;
ASSERT_TRUE(sink_init2_info.key.pubKey.has_value());
SessionInfo sink_info2 = init2_result.sessionInfo;
ASSERT_EQ((int)sink_info2.sharedKeys.size(), 2) << "Expect two symmetric keys from init()";
ASSERT_GT((int)sink_info2.sessionId.size(), 0) << "Expect non-empty session ID from sink";
std::vector<uint8_t> sink_signing_key2 = SigningKeyFromIdentity(sink_init2_info.identity);
CheckSignature(sink_signing_key2, sink_info2.sessionId, sink_info2.signature);
// Step 3: pass the sink's ECDH public keys and other session info to the each of the sources.
SessionInfo source1_info;
ASSERT_EQ(OK, GetReturnError(source1->finish(sink_init1_info.key.pubKey.value(),
sink_init1_info.identity, sink_info1.signature,
sink_init1_info.nonce, sink_init1_info.version,
source1_init_info.key, &source1_info)));
ASSERT_EQ((int)source1_info.sharedKeys.size(), 2) << "Expect two symmetric keys from finsh()";
ASSERT_GT((int)source1_info.sessionId.size(), 0) << "Expect non-empty session ID from source";
std::vector<uint8_t> source1_signing_key = SigningKeyFromIdentity(source1_init_info.identity);
CheckSignature(source1_signing_key, source1_info.sessionId, source1_info.signature);
SessionInfo source2_info;
ASSERT_EQ(OK, GetReturnError(source2->finish(sink_init2_info.key.pubKey.value(),
sink_init2_info.identity, sink_info2.signature,
sink_init2_info.nonce, sink_init2_info.version,
source2_init_info.key, &source2_info)));
ASSERT_EQ((int)source2_info.sharedKeys.size(), 2) << "Expect two symmetric keys from finsh()";
ASSERT_GT((int)source2_info.sessionId.size(), 0) << "Expect non-empty session ID from source";
std::vector<uint8_t> source2_signing_key = SigningKeyFromIdentity(source2_init_info.identity);
CheckSignature(source2_signing_key, source2_info.sessionId, source2_info.signature);
// Both ends should agree on the session ID.
ASSERT_EQ(source1_info.sessionId, sink_info1.sessionId);
ASSERT_EQ(source2_info.sessionId, sink_info2.sessionId);
// Step 4: pass the each source's session ID info back to the sink, so it can check it and
// update the symmetric keys so they're marked as authentication complete.
std::array<Arc, 2> auth_complete_result1;
ASSERT_EQ(OK, GetReturnError(sink->authenticationComplete(
source1_info.signature, sink_info1.sharedKeys, &auth_complete_result1)));
ASSERT_EQ((int)auth_complete_result1.size(), 2)
<< "Expect two symmetric keys from authComplete()";
sink_info1.sharedKeys = auth_complete_result1;
std::array<Arc, 2> auth_complete_result2;
ASSERT_EQ(OK, GetReturnError(sink->authenticationComplete(
source2_info.signature, sink_info2.sharedKeys, &auth_complete_result2)));
ASSERT_EQ((int)auth_complete_result2.size(), 2)
<< "Expect two symmetric keys from authComplete()";
sink_info2.sharedKeys = auth_complete_result2;
}
TEST_P(AuthGraphSessionTest, FreshNonces) {
std::shared_ptr<IAuthGraphKeyExchange> source = authNode_;
std::shared_ptr<IAuthGraphKeyExchange> sink = authNode_;
SessionInitiationInfo source_init_info1;
ASSERT_EQ(OK, GetReturnError(source->create(&source_init_info1)));
SessionInitiationInfo source_init_info2;
ASSERT_EQ(OK, GetReturnError(source->create(&source_init_info2)));
// Two calls to create() should result in the same identity but different nonce values.
ASSERT_EQ(source_init_info1.identity, source_init_info2.identity);
ASSERT_NE(source_init_info1.nonce, source_init_info2.nonce);
ASSERT_NE(source_init_info1.key.pubKey, source_init_info2.key.pubKey);
ASSERT_NE(source_init_info1.key.arcFromPBK, source_init_info2.key.arcFromPBK);
KeInitResult init_result1;
ASSERT_EQ(OK, GetReturnError(sink->init(source_init_info1.key.pubKey.value(),
source_init_info1.identity, source_init_info1.nonce,
source_init_info1.version, &init_result1)));
KeInitResult init_result2;
ASSERT_EQ(OK, GetReturnError(sink->init(source_init_info2.key.pubKey.value(),
source_init_info2.identity, source_init_info2.nonce,
source_init_info2.version, &init_result2)));
// Two calls to init() should result in the same identity buf different nonces and session IDs.
ASSERT_EQ(init_result1.sessionInitiationInfo.identity,
init_result2.sessionInitiationInfo.identity);
ASSERT_NE(init_result1.sessionInitiationInfo.nonce, init_result2.sessionInitiationInfo.nonce);
ASSERT_NE(init_result1.sessionInfo.sessionId, init_result2.sessionInfo.sessionId);
}
INSTANTIATE_TEST_SUITE_P(PerInstance, AuthGraphSessionTest,
testing::ValuesIn(AuthGraphSessionTest::build_params()),
::android::PrintInstanceNameToString);
GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(AuthGraphSessionTest);
} // namespace aidl::android::hardware::security::authgraph::test
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}

46
security/authgraph/default/Android.bp Normal file
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@ -0,0 +1,46 @@
//
// Copyright (C) 2023 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 {
// See: http://go/android-license-faq
// A large-scale-change added 'default_applicable_licenses' to import
// all of the 'license_kinds' from "hardware_interfaces_license"
// to get the below license kinds:
// SPDX-license-identifier-Apache-2.0
default_applicable_licenses: ["hardware_interfaces_license"],
}
rust_binary {
name: "android.hardware.security.authgraph-service.nonsecure",
relative_install_path: "hw",
vendor: true,
init_rc: ["authgraph.rc"],
vintf_fragments: ["authgraph.xml"],
defaults: [
"authgraph_use_latest_hal_aidl_rust",
],
rustlibs: [
"libandroid_logger",
"libauthgraph_core",
"libauthgraph_boringssl",
"libauthgraph_hal",
"libbinder_rs",
"liblibc",
"liblog_rust",
],
srcs: [
"src/main.rs",
],
}

5
security/authgraph/default/authgraph.rc Normal file
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service vendor.authgraph /vendor/bin/hw/android.hardware.security.authgraph-service.nonsecure
interface aidl android.hardware.security.authgraph.IAuthGraph/nonsecure
class hal
user nobody
group nobody

10
security/authgraph/default/authgraph.xml Normal file
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<manifest version="1.0" type="device">
<hal format="aidl">
<name>android.hardware.security.authgraph</name>
<version>1</version>
<interface>
<name>IAuthGraphKeyExchange</name>
<instance>nonsecure</instance>
</interface>
</hal>
</manifest>

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/*
* Copyright (C) 2023 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.
*/
//! Default implementation of the AuthGraph key exchange HAL.
//!
//! This implementation of the HAL is only intended to allow testing and policy compliance. A real
//! implementation of the AuthGraph HAL would be implemented in a secure environment, and would not
//! be independently registered with service manager (a secure component that uses AuthGraph would
//! expose an entrypoint that allowed retrieval of the specific IAuthGraphKeyExchange instance that
//! is correlated with the component).
use android_hardware_security_authgraph::aidl::android::hardware::security::authgraph::{
Arc::Arc, IAuthGraphKeyExchange::BnAuthGraphKeyExchange,
IAuthGraphKeyExchange::IAuthGraphKeyExchange, Identity::Identity, KeInitResult::KeInitResult,
Key::Key, PubKey::PubKey, SessionIdSignature::SessionIdSignature, SessionInfo::SessionInfo,
SessionInitiationInfo::SessionInitiationInfo,
};
use authgraph_boringssl as boring;
use authgraph_core::{key::MillisecondsSinceEpoch, keyexchange as ke, traits};
use authgraph_hal::{err_to_binder, Innto, TryInnto};
use log::{error, info};
use std::ffi::CString;
use std::sync::Mutex;
static SERVICE_NAME: &str = "android.hardware.security.authgraph.IAuthGraphKeyExchange";
static SERVICE_INSTANCE: &str = "nonsecure";
/// Local error type for failures in the HAL service.
#[derive(Debug, Clone)]
struct HalServiceError(String);
impl From<String> for HalServiceError {
fn from(s: String) -> Self {
Self(s)
}
}
fn main() {
if let Err(e) = inner_main() {
panic!("HAL service failed: {:?}", e);
}
}
fn inner_main() -> Result<(), HalServiceError> {
// Initialize Android logging.
android_logger::init_once(
android_logger::Config::default()
.with_tag("authgraph-hal-nonsecure")
.with_min_level(log::Level::Info)
.with_log_id(android_logger::LogId::System),
);
// Redirect panic messages to logcat.
std::panic::set_hook(Box::new(|panic_info| {
error!("{}", panic_info);
}));
info!("Insecure AuthGraph key exchange HAL service is starting.");
info!("Starting thread pool now.");
binder::ProcessState::start_thread_pool();
// Register the service
let service = AuthGraphService::new_as_binder();
let service_name = format!("{}/{}", SERVICE_NAME, SERVICE_INSTANCE);
binder::add_service(&service_name, service.as_binder()).map_err(|e| {
format!(
"Failed to register service {} because of {:?}.",
service_name, e
)
})?;
info!("Successfully registered AuthGraph HAL services.");
binder::ProcessState::join_thread_pool();
info!("AuthGraph HAL service is terminating."); // should not reach here
Ok(())
}
/// Non-secure implementation of the AuthGraph key exchange service.
struct AuthGraphService {
imp: Mutex<traits::TraitImpl>,
}
impl AuthGraphService {
/// Create a new instance.
fn new() -> Self {
Self {
imp: Mutex::new(traits::TraitImpl {
aes_gcm: Box::new(boring::BoringAes),
ecdh: Box::new(boring::BoringEcDh),
ecdsa: Box::new(boring::BoringEcDsa),
hmac: Box::new(boring::BoringHmac),
hkdf: Box::new(boring::BoringHkdf),
sha256: Box::new(boring::BoringSha256),
rng: Box::new(boring::BoringRng),
device: Box::<boring::test_device::AgDevice>::default(),
clock: Some(Box::new(StdClock)),
}),
}
}
/// Create a new instance wrapped in a proxy object.
pub fn new_as_binder() -> binder::Strong<dyn IAuthGraphKeyExchange> {
BnAuthGraphKeyExchange::new_binder(Self::new(), binder::BinderFeatures::default())
}
}
impl binder::Interface for AuthGraphService {}
/// Extract (and require) an unsigned public key as bytes from a [`PubKey`].
fn unsigned_pub_key(pub_key: &PubKey) -> binder::Result<&[u8]> {
match pub_key {
PubKey::PlainKey(key) => Ok(&key.plainPubKey),
PubKey::SignedKey(_) => Err(binder::Status::new_exception(
binder::ExceptionCode::ILLEGAL_ARGUMENT,
Some(&CString::new("expected unsigned public key").unwrap()),
)),
}
}
/// This nonsecure implementation of the AuthGraph HAL interface directly calls the AuthGraph
/// reference implementation library code; a real implementation requires the AuthGraph
/// code to run in a secure environment, not within Android.
impl IAuthGraphKeyExchange for AuthGraphService {
fn create(&self) -> binder::Result<SessionInitiationInfo> {
info!("create()");
let mut imp = self.imp.lock().unwrap();
let info = ke::create(&mut *imp).map_err(err_to_binder)?;
Ok(info.innto())
}
fn init(
&self,
peer_pub_key: &PubKey,
peer_id: &Identity,
peer_nonce: &[u8],
peer_version: i32,
) -> binder::Result<KeInitResult> {
info!("init(v={peer_version})");
let mut imp = self.imp.lock().unwrap();
let peer_pub_key = unsigned_pub_key(peer_pub_key)?;
let result = ke::init(
&mut *imp,
peer_pub_key,
&peer_id.identity,
&peer_nonce,
peer_version,
)
.map_err(err_to_binder)?;
Ok(result.innto())
}
fn finish(
&self,
peer_pub_key: &PubKey,
peer_id: &Identity,
peer_signature: &SessionIdSignature,
peer_nonce: &[u8],
peer_version: i32,
own_key: &Key,
) -> binder::Result<SessionInfo> {
info!("finish(v={peer_version})");
let mut imp = self.imp.lock().unwrap();
let peer_pub_key = unsigned_pub_key(peer_pub_key)?;
let own_key: Key = own_key.clone();
let own_key: authgraph_core::key::Key = own_key.try_innto()?;
let session_info = ke::finish(
&mut *imp,
peer_pub_key,
&peer_id.identity,
&peer_signature.signature,
&peer_nonce,
peer_version,
own_key,
)
.map_err(err_to_binder)?;
Ok(session_info.innto())
}
fn authenticationComplete(
&self,
peer_signature: &SessionIdSignature,
shared_keys: &[Arc; 2],
) -> binder::Result<[Arc; 2]> {
info!("authComplete()");
let mut imp = self.imp.lock().unwrap();
let shared_keys = [shared_keys[0].arc.clone(), shared_keys[1].arc.clone()];
let arcs = ke::authentication_complete(&mut *imp, &peer_signature.signature, shared_keys)
.map_err(err_to_binder)?;
Ok(arcs.map(|arc| Arc { arc }))
}
}
/// Monotonic clock.
#[derive(Default)]
pub struct StdClock;
impl traits::MonotonicClock for StdClock {
fn now(&self) -> authgraph_core::key::MillisecondsSinceEpoch {
let mut time = libc::timespec {
tv_sec: 0, // libc::time_t
tv_nsec: 0, // libc::c_long
};
let rc =
// Safety: `time` is a valid structure.
unsafe { libc::clock_gettime(libc::CLOCK_BOOTTIME, &mut time as *mut libc::timespec) };
if rc < 0 {
log::warn!("failed to get time!");
return MillisecondsSinceEpoch(0);
}
// The types in `libc::timespec` may be different on different architectures,
// so allow conversion to `i64`.
#[allow(clippy::unnecessary_cast)]
MillisecondsSinceEpoch((time.tv_sec as i64 * 1000) + (time.tv_nsec as i64 / 1000 / 1000))
}
}