third_party/openssl: add ChaCha20+Poly1305 support.

openssl/crypto/chacha/chacha.h

-/* crypto/srp/srp_lcl.h */
-/* Written by Peter Sylvester (peter.sylvester@edelweb.fr)  
- * for the EdelKey project and contributed to the OpenSSL project 2004.
+/*
+ *  Chacha stream algorithm.
+ *
+ *  Created on: Jun, 2013
+ *  Author: Elie Bursztein (elieb@google.com)
+ *
+ *  Adapted from the estream code by D. Bernstein.
  */
 /* ====================================================================
- * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 2011-2013 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. 
+ *    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/)"
@@ skipping 18 matching lines @@
  * 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.
  * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
  */
-#ifndef HEADER_SRP_LCL_H
-#define HEADER_SRP_LCL_H
+#ifndef HEADER_CHACHA_H
+#define HEADER_CHACHA_H
 
-#include <openssl/srp.h>
-#include <openssl/sha.h>
+#include <openssl/opensslconf.h>
 
-#if 0
-#define srp_bn_print(a) {fprintf(stderr, #a "="); BN_print_fp(stderr,a); \
-   fprintf(stderr,"\n");}
-#else
-#define   srp_bn_print(a)
+#if defined(OPENSSL_NO_CHACHA)
+#error ChaCha support is disabled.
 #endif
 
-
+#include <stddef.h>
 
 #ifdef  __cplusplus
 extern "C" {
 #endif
 
-
+/* CRYPTO_chacha_20 encrypts |in_len| bytes from |in| with the given key and
+ * nonce and writes the result to |out|, which may be equal to |in|. The
+ * initial block counter is specified by |counter|. */
+void CRYPTO_chacha_20(unsigned char *out,
+                      const unsigned char *in, size_t in_len,
+                      const unsigned char key[32],
+                      const unsigned char nonce[8],
+                      size_t counter);
 
 #ifdef  __cplusplus
 }
 #endif
 
 #endif