Merge the get_ssl_method hooks between TLS and SSLv3.

Remove one more difference to worry about switching between TLS and SSLv3
method tables.

Although this does change the get_ssl_method hook for the version-specific
tables (before TLS and SSLv3 would be somewhat partitioned), it does not appear
to do anything. get_ssl_method is only ever called in SSL_set_session for
client session resumption. Either you're using the version-specific method
tables and don't know about other versions anyway or you're using SSLv23 and
don't partition TLS vs SSL3 anyway.

BUG=chromium:403378

Change-Id: I8cbdf02847653a01b04dbbcaf61fcb3fa4753a99
Reviewed-on: https://boringssl-review.googlesource.com/1842
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/ssl/CMakeLists.txt b/ssl/CMakeLists.txt
index 49f7c3d..47ef92b 100644
--- a/ssl/CMakeLists.txt
+++ b/ssl/CMakeLists.txt
@@ -37,12 +37,9 @@
 	ssl_sess.c
 	ssl_stat.c
 	ssl_txt.c
-	t1_clnt.c
 	t1_enc.c
 	t1_lib.c
-	t1_meth.c
 	t1_reneg.c
-	t1_srvr.c
 
 	$<TARGET_OBJECTS:pqueue>
 )
diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index f73cf08..6574f5a 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -165,16 +165,41 @@
 #include "ssl_locl.h"
 #include "../crypto/dh/internal.h"
 
-static const SSL_METHOD *ssl3_get_client_method(int ver);
-
 static const SSL_METHOD *ssl3_get_client_method(int ver)
 	{
-	if (ver == SSL3_VERSION)
-		return(SSLv3_client_method());
-	else
-		return(NULL);
+	switch (ver)
+		{
+	case TLS1_2_VERSION:
+		return TLSv1_2_client_method();
+	case TLS1_1_VERSION:
+		return TLSv1_1_client_method();
+	case TLS1_VERSION:
+		return TLSv1_client_method();
+	case SSL3_VERSION:
+		return SSLv3_client_method();
+	default:
+		return NULL;
+		}
 	}
 
+IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_client_method,
+			ssl_undefined_function,
+			ssl3_connect,
+			ssl3_get_client_method,
+			TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_client_method,
+			ssl_undefined_function,
+			ssl3_connect,
+			ssl3_get_client_method,
+			TLSv1_1_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_client_method,
+			ssl_undefined_function,
+			ssl3_connect,
+			ssl3_get_client_method,
+			TLSv1_enc_data)
+
 IMPLEMENT_tls_meth_func(SSL3_VERSION, SSLv3_client_method,
 			ssl_undefined_function,
 			ssl3_connect,
diff --git a/ssl/s3_meth.c b/ssl/s3_meth.c
index dcdf84e..e730d47 100644
--- a/ssl/s3_meth.c
+++ b/ssl/s3_meth.c
@@ -62,15 +62,41 @@
 #include "ssl_locl.h"
 
 
-static const SSL_METHOD *ssl3_get_method(int ver);
 static const SSL_METHOD *ssl3_get_method(int ver)
 	{
-	if (ver == SSL3_VERSION)
-		return(SSLv3_method());
-	else 
-		return(NULL);
+	switch (ver)
+		{
+	case TLS1_2_VERSION:
+		return TLSv1_2_method();
+	case TLS1_1_VERSION:
+		return TLSv1_1_method();
+	case TLS1_VERSION:
+		return TLSv1_method();
+	case SSL3_VERSION:
+		return SSLv3_method();
+	default:
+		return NULL;
+		}
 	}
 
+IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_method,
+			ssl3_accept,
+			ssl3_connect,
+			ssl3_get_method,
+			TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_method,
+			ssl3_accept,
+			ssl3_connect,
+			ssl3_get_method,
+			TLSv1_1_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_method,
+			ssl3_accept,
+			ssl3_connect,
+			ssl3_get_method,
+			TLSv1_enc_data)
+
 IMPLEMENT_tls_meth_func(SSL3_VERSION, SSLv3_method,
 			ssl3_accept,
 			ssl3_connect,
diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c
index 3b2ab76..b355f5b 100644
--- a/ssl/s3_srvr.c
+++ b/ssl/s3_srvr.c
@@ -171,16 +171,41 @@
 #include "ssl_locl.h"
 #include "../crypto/dh/internal.h"
 
-static const SSL_METHOD *ssl3_get_server_method(int ver);
-
 static const SSL_METHOD *ssl3_get_server_method(int ver)
 	{
-	if (ver == SSL3_VERSION)
-		return(SSLv3_server_method());
-	else
-		return(NULL);
+	switch (ver)
+		{
+	case TLS1_2_VERSION:
+		return TLSv1_2_server_method();
+	case TLS1_1_VERSION:
+		return TLSv1_1_server_method();
+	case TLS1_VERSION:
+		return TLSv1_server_method();
+	case SSL3_VERSION:
+		return SSLv3_server_method();
+	default:
+		return NULL;
+		}
 	}
 
+IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_server_method,
+			ssl3_accept,
+			ssl_undefined_function,
+			ssl3_get_server_method,
+			TLSv1_2_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_server_method,
+			ssl3_accept,
+			ssl_undefined_function,
+			ssl3_get_server_method,
+			TLSv1_1_enc_data)
+
+IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_server_method,
+			ssl3_accept,
+			ssl_undefined_function,
+			ssl3_get_server_method,
+			TLSv1_enc_data)
+
 IMPLEMENT_tls_meth_func(SSL3_VERSION, SSLv3_server_method,
 			ssl3_accept,
 			ssl_undefined_function,
diff --git a/ssl/t1_clnt.c b/ssl/t1_clnt.c
deleted file mode 100644
index e83c79c..0000000
--- a/ssl/t1_clnt.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
-#include <stdio.h>
-
-#include <openssl/buf.h>
-#include <openssl/rand.h>
-#include <openssl/obj.h>
-#include <openssl/evp.h>
-
-#include "ssl_locl.h"
-
-
-static const SSL_METHOD *tls1_get_client_method(int ver);
-static const SSL_METHOD *tls1_get_client_method(int ver)
-	{
-	if (ver == TLS1_2_VERSION)
-		return TLSv1_2_client_method();
-	if (ver == TLS1_1_VERSION)
-		return TLSv1_1_client_method();
-	if (ver == TLS1_VERSION)
-		return TLSv1_client_method();
-	return NULL;
-	}
-
-IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_client_method,
-			ssl_undefined_function,
-			ssl3_connect,
-			tls1_get_client_method,
-			TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_client_method,
-			ssl_undefined_function,
-			ssl3_connect,
-			tls1_get_client_method,
-			TLSv1_1_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_client_method,
-			ssl_undefined_function,
-			ssl3_connect,
-			tls1_get_client_method,
-			TLSv1_enc_data)
diff --git a/ssl/t1_meth.c b/ssl/t1_meth.c
deleted file mode 100644
index 313ce65..0000000
--- a/ssl/t1_meth.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/* ssl/t1_meth.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
-#include <stdio.h>
-
-#include <openssl/obj.h>
-
-#include "ssl_locl.h"
-
-
-static const SSL_METHOD *tls1_get_method(int ver)
-	{
-	if (ver == TLS1_2_VERSION)
-		return TLSv1_2_method();
-	if (ver == TLS1_1_VERSION)
-		return TLSv1_1_method();
-	if (ver == TLS1_VERSION)
-		return TLSv1_method();
-	return NULL;
-	}
-
-IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_method,
-			ssl3_accept,
-			ssl3_connect,
-			tls1_get_method,
-			TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_method,
-			ssl3_accept,
-			ssl3_connect,
-			tls1_get_method,
-			TLSv1_1_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_method,
-			ssl3_accept,
-			ssl3_connect,
-			tls1_get_method,
-			TLSv1_enc_data)
diff --git a/ssl/t1_srvr.c b/ssl/t1_srvr.c
deleted file mode 100644
index 6fa7da6..0000000
--- a/ssl/t1_srvr.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
-#include <stdio.h>
-
-#include <openssl/buf.h>
-#include <openssl/evp.h>
-#include <openssl/obj.h>
-#include <openssl/rand.h>
-#include <openssl/x509.h>
-
-#include "ssl_locl.h"
-
-
-static const SSL_METHOD *tls1_get_server_method(int ver);
-static const SSL_METHOD *tls1_get_server_method(int ver)
-	{
-	if (ver == TLS1_2_VERSION)
-		return TLSv1_2_server_method();
-	if (ver == TLS1_1_VERSION)
-		return TLSv1_1_server_method();
-	if (ver == TLS1_VERSION)
-		return TLSv1_server_method();
-	return NULL;
-	}
-
-IMPLEMENT_tls_meth_func(TLS1_2_VERSION, TLSv1_2_server_method,
-			ssl3_accept,
-			ssl_undefined_function,
-			tls1_get_server_method,
-			TLSv1_2_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_1_VERSION, TLSv1_1_server_method,
-			ssl3_accept,
-			ssl_undefined_function,
-			tls1_get_server_method,
-			TLSv1_1_enc_data)
-
-IMPLEMENT_tls_meth_func(TLS1_VERSION, TLSv1_server_method,
-			ssl3_accept,
-			ssl_undefined_function,
-			tls1_get_server_method,
-			TLSv1_enc_data)