From 523d54282c543c650be946602c618cf48ec008de Mon Sep 17 00:00:00 2001
From: jsing <>
Date: Thu, 29 May 2014 16:00:16 +0000
Subject: Make it substantially easier to identify protocol version
 requirements by adding an enc_flags field to the ssl3_enc_method, specifying
 four flags that are used with this field and providing macros for evaluating
 these conditions. Currently the version requirements are identified by
 continually checking the version number and other criteria.

This change also adds separate SSL3_ENC_METHOD data for TLS v1.1 and v1.2,
since they have different enc_flags from TLS v1.

Based on changes in OpenSSL head.

No objection from miod@
---
 src/lib/libssl/ssl_locl.h | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

(limited to 'src/lib/libssl/ssl_locl.h')

diff --git a/src/lib/libssl/ssl_locl.h b/src/lib/libssl/ssl_locl.h
index 464a4a88fe..11250ba468 100644
--- a/src/lib/libssl/ssl_locl.h
+++ b/src/lib/libssl/ssl_locl.h
@@ -408,8 +408,20 @@
 				(c)->algo_strength)
 #define SSL_C_EXPORT_PKEYLENGTH(c)	SSL_EXPORT_PKEYLENGTH((c)->algo_strength)
 
+/* Check if an SSL structure is using DTLS. */
+#define SSL_IS_DTLS(s) (s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
 
+/* See if we need explicit IV. */
+#define SSL_USE_EXPLICIT_IV(s) \
+	(s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_EXPLICIT_IV)
 
+/* See if we use signature algorithms extension. */
+#define SSL_USE_SIGALGS(s) \
+	(s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_SIGALGS)
+
+/* Allow TLS 1.2 ciphersuites: applies to DTLS 1.2 as well as TLS 1.2. */
+#define SSL_USE_TLS1_2_CIPHERS(s) \
+	(s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)
 
 /* Mostly for SSLv3 */
 #define SSL_PKEY_RSA_ENC	0
@@ -535,8 +547,29 @@ typedef struct ssl3_enc_method {
 	int (*export_keying_material)(SSL *, unsigned char *, size_t,
 	    const char *, size_t, const unsigned char *, size_t,
 	    int use_context);
+	/* Flags indicating protocol version requirements. */
+	unsigned int enc_flags;
 } SSL3_ENC_METHOD;
 
+/*
+ * Flag values for enc_flags.
+ */
+
+/* Uses explicit IV. */
+#define SSL_ENC_FLAG_EXPLICIT_IV        (1 << 0)
+
+/* Uses signature algorithms extension. */
+#define SSL_ENC_FLAG_SIGALGS            (1 << 1)
+
+/* Uses SHA256 default PRF. */
+#define SSL_ENC_FLAG_SHA256_PRF         (1 << 2)
+
+/* Is DTLS. */
+#define SSL_ENC_FLAG_DTLS               (1 << 3)
+
+/* Allow TLS 1.2 ciphersuites: applies to DTLS 1.2 as well as TLS 1.2. */
+#define SSL_ENC_FLAG_TLS1_2_CIPHERS     (1 << 4)
+
 #ifndef OPENSSL_NO_COMP
 /* Used for holding the relevant compression methods loaded into SSL_CTX */
 typedef struct ssl3_comp_st {
@@ -552,11 +585,11 @@ extern SSL_CIPHER ssl3_ciphers[];
 SSL_METHOD *ssl_bad_method(int ver);
 
 extern SSL3_ENC_METHOD TLSv1_enc_data;
+extern SSL3_ENC_METHOD TLSv1_1_enc_data;
+extern SSL3_ENC_METHOD TLSv1_2_enc_data;
 extern SSL3_ENC_METHOD SSLv3_enc_data;
 extern SSL3_ENC_METHOD DTLSv1_enc_data;
 
-#define SSL_IS_DTLS(s) (s->method->version == DTLS1_VERSION)
-
 void ssl_clear_cipher_ctx(SSL *s);
 int ssl_clear_bad_session(SSL *s);
 CERT *ssl_cert_new(void);
-- 
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