diff --git a/identity/aidl/default/IdentityCredential.h b/identity/aidl/default/IdentityCredential.h
new file mode 100644
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+++ b/identity/aidl/default/IdentityCredential.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2019, 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.
+ */
+
+#ifndef ANDROID_HARDWARE_IDENTITY_IDENTITYCREDENTIAL_H
+#define ANDROID_HARDWARE_IDENTITY_IDENTITYCREDENTIAL_H
+
+#include <aidl/android/hardware/identity/BnIdentityCredential.h>
+#include <aidl/android/hardware/keymaster/HardwareAuthToken.h>
+#include <android/hardware/identity/support/IdentityCredentialSupport.h>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+
+#include <cppbor/cppbor.h>
+
+namespace aidl::android::hardware::identity {
+
+using ::aidl::android::hardware::keymaster::HardwareAuthToken;
+using ::std::map;
+using ::std::string;
+using ::std::vector;
+
+using MapStringToVectorOfStrings = map<string, vector<string>>;
+
+class IdentityCredential : public BnIdentityCredential {
+  public:
+    IdentityCredential(const vector<uint8_t>& credentialData)
+        : credentialData_(credentialData), numStartRetrievalCalls_(0), authChallenge_(0) {}
+
+    // Parses and decrypts credentialData_, return a status code from
+    // IIdentityCredentialStore. Must be called right after construction.
+    int initialize();
+
+    // Methods from IIdentityCredential follow.
+    ndk::ScopedAStatus deleteCredential(vector<int8_t>* outProofOfDeletionSignature) override;
+    ndk::ScopedAStatus createEphemeralKeyPair(vector<int8_t>* outKeyPair) override;
+    ndk::ScopedAStatus setReaderEphemeralPublicKey(const vector<int8_t>& publicKey) override;
+    ndk::ScopedAStatus createAuthChallenge(int64_t* outChallenge) override;
+    ndk::ScopedAStatus startRetrieval(
+            const vector<SecureAccessControlProfile>& accessControlProfiles,
+            const HardwareAuthToken& authToken, const vector<int8_t>& itemsRequest,
+            const vector<int8_t>& sessionTranscript, const vector<int8_t>& readerSignature,
+            const vector<int32_t>& requestCounts) override;
+    ndk::ScopedAStatus startRetrieveEntryValue(
+            const string& nameSpace, const string& name, int32_t entrySize,
+            const vector<int32_t>& accessControlProfileIds) override;
+    ndk::ScopedAStatus retrieveEntryValue(const vector<int8_t>& encryptedContent,
+                                          vector<int8_t>* outContent) override;
+    ndk::ScopedAStatus finishRetrieval(const vector<int8_t>& signingKeyBlob, vector<int8_t>* outMac,
+                                       vector<int8_t>* outDeviceNameSpaces) override;
+    ndk::ScopedAStatus generateSigningKeyPair(vector<int8_t>* outSigningKeyBlob,
+                                              Certificate* outSigningKeyCertificate) override;
+
+  private:
+    // Set by constructor
+    vector<uint8_t> credentialData_;
+    int numStartRetrievalCalls_;
+
+    // Set by initialize()
+    string docType_;
+    bool testCredential_;
+    vector<uint8_t> storageKey_;
+    vector<uint8_t> credentialPrivKey_;
+
+    // Set by createEphemeralKeyPair()
+    vector<uint8_t> ephemeralPublicKey_;
+
+    // Set by setReaderEphemeralPublicKey()
+    vector<uint8_t> readerPublicKey_;
+
+    // Set by createAuthChallenge()
+    uint64_t authChallenge_;
+
+    // Set at startRetrieval() time.
+    map<int32_t, int> profileIdToAccessCheckResult_;
+    vector<uint8_t> sessionTranscript_;
+    std::unique_ptr<cppbor::Item> sessionTranscriptItem_;
+    vector<uint8_t> itemsRequest_;
+    vector<int32_t> requestCountsRemaining_;
+    MapStringToVectorOfStrings requestedNameSpacesAndNames_;
+    cppbor::Map deviceNameSpacesMap_;
+    cppbor::Map currentNameSpaceDeviceNameSpacesMap_;
+
+    // Set at startRetrieveEntryValue() time.
+    string currentNameSpace_;
+    string currentName_;
+    size_t entryRemainingBytes_;
+    vector<uint8_t> entryValue_;
+    vector<uint8_t> entryAdditionalData_;
+};
+
+}  // namespace aidl::android::hardware::identity
+
+#endif  // ANDROID_HARDWARE_IDENTITY_IDENTITYCREDENTIAL_H