Add ChaCha20-Poly1305 based ciphersuites.

Based on Adam Langley's chromium patches.

Tested by and ok sthen@

1 files changed, 14 insertions, 2 deletions

diff --git a/src/lib/libssl/ssl_ciph.c b/src/lib/libssl/ssl_ciph.c
index 25291bfd4a..a89c8253c8 100644
--- a/src/lib/libssl/ssl_ciph.c
+++ b/src/lib/libssl/ssl_ciph.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssl_ciph.c,v 1.52 2014/06/12 15:49:31 deraadt Exp $ */
+/* $OpenBSD: ssl_ciph.c,v 1.53 2014/06/13 13:28:53 jsing Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -916,6 +916,11 @@ ssl_cipher_get_evp_aead(const SSL_SESSION *s, const EVP_AEAD **aead)
                 *aead = EVP_aead_aes_256_gcm();
                 return 1;
 #endif
+#if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
+        case SSL_CHACHA20POLY1305:
+                *aead = EVP_aead_chacha20_poly1305();
+                return 1;
+#endif
         default:
                 break;
         }
@@ -1617,7 +1622,11 @@ ssl_create_cipher_list(const SSL_METHOD *ssl_method,
         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
 
-        /* AES is our preferred symmetric cipher */
+        /*
+         * CHACHA20 is fast and safe on all hardware and is thus our preferred
+         * symmetric cipher, with AES second.
+         */
+        ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
 
         /* Temporarily enable everything else for sorting */
@@ -1871,6 +1880,9 @@ SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
         case SSL_SEED:
                 enc="SEED(128)";
                 break;
+        case SSL_CHACHA20POLY1305:
+                enc = "ChaCha20-Poly1305";
+                break;
         default:
                 enc="unknown";
                 break;