third_party/openssl: add ChaCha20+Poly1305 support.

openssl/include/openssl/ssl.h

Index: openssl/include/openssl/ssl.h
diff --git a/openssl/include/openssl/ssl.h b/openssl/include/openssl/ssl.h
index 2853a914ffe60bbb04c72fb6f94e67da99b8e85a..a3944f177dda9ae8f632a6e70bb8d93081355233 100644
--- a/openssl/include/openssl/ssl.h
+++ b/openssl/include/openssl/ssl.h
@@ -291,6 +291,7 @@ extern "C" {
 #define SSL_TXT_CAMELLIA128	"CAMELLIA128"
 #define SSL_TXT_CAMELLIA256	"CAMELLIA256"
 #define SSL_TXT_CAMELLIA	"CAMELLIA"
+#define SSL_TXT_CHACHA20	"CHACHA20"
 
 #define SSL_TXT_MD5		"MD5"
 #define SSL_TXT_SHA1		"SHA1"
@@ -399,7 +400,9 @@ struct ssl_cipher_st
 	unsigned long algorithm_ssl;	/* (major) protocol version */
 
 	unsigned long algo_strength;	/* strength and export flags */
-	unsigned long algorithm2;	/* Extra flags */
+	unsigned long algorithm2;	/* Extra flags. See SSL2_CF_* in ssl2.h
+					   and algorithm2 section in
+					   ssl_locl.h */
 	int strength_bits;		/* Number of bits really used */
 	int alg_bits;			/* Number of bits for algorithm */
 	};
@@ -728,6 +731,9 @@ int SRP_generate_client_master_secret(SSL *s,unsigned char *master_key);
 
 #endif
 
+struct ssl_aead_ctx_st;
+typedef struct ssl_aead_ctx_st SSL_AEAD_CTX;
+
 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
 #define SSL_MAX_CERT_LIST_DEFAULT 1024*30 /* 30k max cert list :-) */
 #else
@@ -1213,6 +1219,9 @@ struct ssl_st
 	/* These are the ones being used, the ones in SSL_SESSION are
 	 * the ones to be 'copied' into these ones */
 	int mac_flags; 
+	SSL_AEAD_CTX *aead_read_ctx;	/* AEAD context. If non-NULL, then
+					   |enc_read_ctx| and |read_hash| are
+					   ignored. */
 	EVP_CIPHER_CTX *enc_read_ctx;		/* cryptographic state */
 	EVP_MD_CTX *read_hash;		/* used for mac generation */
 #ifndef OPENSSL_NO_COMP
@@ -1221,6 +1230,9 @@ struct ssl_st
 	char *expand;
 #endif
 
+	SSL_AEAD_CTX *aead_write_ctx;	/* AEAD context. If non-NULL, then
+					   |enc_write_ctx| and |write_hash| are
+					   ignored. */
 	EVP_CIPHER_CTX *enc_write_ctx;		/* cryptographic state */
 	EVP_MD_CTX *write_hash;		/* used for mac generation */
 #ifndef OPENSSL_NO_COMP
@@ -2327,8 +2339,11 @@ void ERR_load_SSL_strings(void);
 #define SSL_F_SSL_USE_RSAPRIVATEKEY_FILE		 206
 #define SSL_F_SSL_VERIFY_CERT_CHAIN			 207
 #define SSL_F_SSL_WRITE					 208
+#define SSL_F_TLS1_AEAD_CTX_INIT			 339
 #define SSL_F_TLS1_CERT_VERIFY_MAC			 286
 #define SSL_F_TLS1_CHANGE_CIPHER_STATE			 209
+#define SSL_F_TLS1_CHANGE_CIPHER_STATE_AEAD		 340
+#define SSL_F_TLS1_CHANGE_CIPHER_STATE_CIPHER		 338
 #define SSL_F_TLS1_CHECK_SERVERHELLO_TLSEXT		 274
 #define SSL_F_TLS1_ENC					 210
 #define SSL_F_TLS1_EXPORT_KEYING_MATERIAL		 314