third_party/openssl: add ChaCha20+Poly1305 support.

openssl/crypto/evp/evp_locl.h

 /* evp_locl.h */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2000.
  */
 /* ====================================================================
  * Copyright (c) 1999 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:
@@ skipping 330 matching lines @@
 
 
         } /* EVP_PKEY_METHOD */;
 
 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
 
 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
                              ASN1_TYPE *param,
                              const EVP_CIPHER *c, const EVP_MD *md, int en_de);
 
+/* EVP_AEAD represents a specific AEAD algorithm. */
+struct evp_aead_st {
+        unsigned char key_len;
+        unsigned char nonce_len;
+        unsigned char overhead;
+        unsigned char max_tag_len;
+
+        int (*init) (struct evp_aead_ctx_st*, const unsigned char *key,
+                     size_t key_len, size_t tag_len);
+        void (*cleanup) (struct evp_aead_ctx_st*);
+
+        ssize_t (*seal) (const struct evp_aead_ctx_st *ctx,
+                         unsigned char *out, size_t max_out_len,
+                         const unsigned char *nonce, size_t nonce_len,
+                         const unsigned char *in, size_t in_len,
+                         const unsigned char *ad, size_t ad_len);
+
+        ssize_t (*open) (const struct evp_aead_ctx_st *ctx,
+                         unsigned char *out, size_t max_out_len,
+                         const unsigned char *nonce, size_t nonce_len,
+                         const unsigned char *in, size_t in_len,
+                         const unsigned char *ad, size_t ad_len);
+};
+
 #ifdef OPENSSL_FIPS
 
 #ifdef OPENSSL_DOING_MAKEDEPEND
 #undef SHA1_Init
 #undef SHA1_Update
 #undef SHA224_Init
 #undef SHA256_Init
 #undef SHA384_Init
 #undef SHA512_Init
 #undef DES_set_key_unchecked
@@ skipping 15 matching lines @@
 #define BF_set_key      private_BF_set_key
 #define CAST_set_key    private_CAST_set_key
 #define idea_set_encrypt_key    private_idea_set_encrypt_key
 #define SEED_set_key    private_SEED_set_key
 #define RC2_set_key     private_RC2_set_key
 #define RC4_set_key     private_RC4_set_key
 #define DES_set_key_unchecked   private_DES_set_key_unchecked
 #define Camellia_set_key        private_Camellia_set_key
 
 #endif