third_party/openssl: add ChaCha20+Poly1305 support.

openssl/crypto/poly1305/poly1305.h

-/* crypto/uid.c */
+/*
+ *  Poly1305
+ *
+ *  Created on: Jun, 2013
+ *  Author: Elie Bursztein (elieb@google.com)
+ *
+ *  Adapted from the estream code by D. Bernstein.
+ */
 /* ====================================================================
- * Copyright (c) 2001 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).
- *
  */
 
-#include <openssl/crypto.h>
+#ifndef HEADER_POLY1305_H_
+#define HEADER_POLY1305_H_
+
+#include <stdint.h>
 #include <openssl/opensslconf.h>
 
-#if defined(__OpenBSD__) || (defined(__FreeBSD__) && __FreeBSD__ > 2)
-
-#include OPENSSL_UNISTD
-
-int OPENSSL_issetugid(void)
-        {
-        return issetugid();
-        }
-
-#elif defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE)
-
-int OPENSSL_issetugid(void)
-        {
-        return 0;
-        }
-
-#else
-
-#include OPENSSL_UNISTD
-#include <sys/types.h>
-
-int OPENSSL_issetugid(void)
-        {
-        if (getuid() != geteuid()) return 1;
-        if (getgid() != getegid()) return 1;
-        return 0;
-        }
+#if defined(OPENSSL_NO_POLY1305)
+#error Poly1305 support is disabled.
 #endif
 
+typedef unsigned char poly1305_state[512];
 
+/* poly1305_init sets up |state| so that it can be used to calculate an
+ * authentication tag with the one-time key |key|. Note that |key| is a
+ * one-time key and therefore there is no `reset' method because that would
+ * enable several messages to be authenticated with the same key. */
+extern void CRYPTO_poly1305_init(poly1305_state* state,
+                                 const unsigned char key[32]);
 
+/* poly1305_update processes |in_len| bytes from |in|. It can be called zero or
+ * more times after poly1305_init. */
+extern void CRYPTO_poly1305_update(poly1305_state* state,
+                                   const unsigned char *in,
+                                   size_t in_len);
+
+/* poly1305_finish completes the poly1305 calculation and writes a 16 byte
+ * authentication tag to |mac|. */
+extern void CRYPTO_poly1305_finish(poly1305_state* state,
+                                   unsigned char mac[16]);
+
+#endif  /* HEADER_POLY1305_H_ */