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diff --git a/third_party/boringssl/include/aes.h b/third_party/boringssl/include/aes.h
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+++ b/third_party/boringssl/include/aes.h
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+/* ====================================================================
+ * Copyright (c) 2002-2006 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ==================================================================== */
+
+#ifndef __CROS_EC_AES_H
+#define __CROS_EC_AES_H
+
+#include <stdint.h>
+
+#define AES_ENCRYPT 1
+#define AES_DECRYPT 0
+
+/* AES_MAXNR is the maximum number of AES rounds. */
+#define AES_MAXNR 14
+
+#define AES_BLOCK_SIZE 16
+
+/*
+ * aes_key_st should be an opaque type, but EVP requires that the size be
+ * known.
+ */
+struct aes_key_st {
+  uint32_t rd_key[4 * (AES_MAXNR + 1)];
+  unsigned rounds;
+};
+typedef struct aes_key_st AES_KEY;
+
+/*
+ * These functions are provided by either common/aes.c, or assembly code,
+ * and should not be called directly.
+ */
+void aes_nohw_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
+void aes_nohw_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
+int aes_nohw_set_encrypt_key(const uint8_t *key, unsigned bits,
+                             AES_KEY *aeskey);
+int aes_nohw_set_decrypt_key(const uint8_t *key, unsigned bits,
+                             AES_KEY *aeskey);
+
+/**
+ * AES_set_encrypt_key configures |aeskey| to encrypt with the |bits|-bit key,
+ * |key|.
+ *
+ * WARNING: unlike other OpenSSL functions, this returns zero on success and a
+ * negative number on error.
+ */
+static inline int AES_set_encrypt_key(const uint8_t *key, unsigned int bits,
+				      AES_KEY *aeskey)
+{
+	return aes_nohw_set_encrypt_key(key, bits, aeskey);
+}
+
+/**
+ * AES_set_decrypt_key configures |aeskey| to decrypt with the |bits|-bit key,
+ * |key|.
+ *
+ * WARNING: unlike other OpenSSL functions, this returns zero on success and a
+ * negative number on error.
+ */
+static inline int AES_set_decrypt_key(const uint8_t *key, unsigned int bits,
+				      AES_KEY *aeskey)
+{
+	return aes_nohw_set_decrypt_key(key, bits, aeskey);
+}
+
+/**
+ * AES_encrypt encrypts a single block from |in| to |out| with |key|. The |in|
+ * and |out| pointers may overlap.
+ */
+static inline void AES_encrypt(const uint8_t *in, uint8_t *out,
+			       const AES_KEY *key)
+{
+	aes_nohw_encrypt(in, out, key);
+}
+
+/**
+ * AES_decrypt decrypts a single block from |in| to |out| with |key|. The |in|
+ * and |out| pointers may overlap.
+ */
+static inline void AES_decrypt(const uint8_t *in, uint8_t *out,
+			const AES_KEY *key)
+{
+	aes_nohw_decrypt(in, out, key);
+}
+
+#endif  /* __CROS_EC_AES_H */