* ext/openssl/ossl_cipher.c: fix errors for installations that do not

feature Authenticated Encryption.
* ext/openssl/extconf.rb: detect presence of EVP_CTRL_GCM_GET_TAG to
  determine whether Authenticated Encryption can be used.
  [Feature #6980] [ruby-core:47426]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38492 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Thu Dec 20 16:39:04 2012  Martin Bosslet  <Martin.Bosslet@gmail.com>
+
+	* ext/openssl/ossl_cipher.c: fix errors for installations that do not
+	  feature Authenticated Encryption.
+	* ext/openssl/extconf.rb: detect presence of EVP_CTRL_GCM_GET_TAG to
+	  determine whether Authenticated Encryption can be used.
+	  [Feature #6980] [ruby-core:47426]
+
 Thu Dec 20 15:55:46 2012  Martin Bosslet  <Martin.Bosslet@gmail.com>
 
 	* ext/openssl/ossl.c: do not use FIPS_mode_set if not available.

ext/openssl/extconf.rb

@@ -148,6 +148,7 @@ have_struct_member("EVP_CIPHER_CTX", "flags", "openssl/evp.h")
 have_struct_member("EVP_CIPHER_CTX", "engine", "openssl/evp.h")
 have_struct_member("X509_ATTRIBUTE", "single", "openssl/x509.h")
 have_macro("OPENSSL_FIPS", ['openssl/opensslconf.h']) && $defs.push("-DHAVE_OPENSSL_FIPS")
+have_macro("EVP_CTRL_GCM_GET_TAG", ['openssl/evp.h']) && $defs.push("-DHAVE_AUTHENTICATED_ENCRYPTION")
 
 Logging::message "=== Checking done. ===\n"
 

ext/openssl/ossl_cipher.c

@@ -482,6 +482,7 @@ ossl_cipher_set_iv(VALUE self, VALUE iv)
     return iv;
 }
 
+#ifdef HAVE_AUTHENTICATED_ENCRYPTION
 /*
  *  call-seq:
  *     cipher.auth_data = string -> string
@@ -644,6 +645,12 @@ ossl_cipher_is_authenticated(VALUE self)
 	return Qfalse;
     }
 }
+#else
+#define ossl_cipher_set_auth_data rb_f_notimplement
+#define ossl_cipher_get_auth_tag rb_f_notimplement
+#define ossl_cipher_set_auth_tag rb_f_notimplement
+#define ossl_cipher_is_authenticated rb_f_notimplement
+#endif
 
 /*
  *  call-seq: