diff --git a/verifierold.h b/verifierold.h
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--- /dev/null
+++ b/verifierold.h
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+/*
+ * Copyright (C) 2008 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 _RECOVERY_VERIFIER_H
+#define _RECOVERY_VERIFIER_H
+
+#include "mincrypt/rsa.h"
+
+#define ASSUMED_UPDATE_BINARY_NAME  "META-INF/com/google/android/update-binary"
+
+enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT };
+
+static const float VERIFICATION_PROGRESS_FRACTION = 0.25;
+
+typedef struct Certificate {
+    int hash_len;  // SHA_DIGEST_SIZE (SHA-1) or SHA256_DIGEST_SIZE (SHA-256)
+    RSAPublicKey* public_key;
+} Certificate;
+
+/* Look in the file for a signature footer, and verify that it
+ * matches one of the given keys.  Return one of the constants below.
+ */
+int verify_file(const char* path);
+
+Certificate* load_keys(const char* filename, int* numKeys);
+
+#define VERIFY_SUCCESS        0
+#define VERIFY_FAILURE        1
+
+#endif  /* _RECOVERY_VERIFIER_H */