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Test mac-then-encrypt

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Verify that the encrypt-then-mac negotiation is handled
correctly. Additionally, when compiled with no-asm, this test ensures
coverage for the constant-time MAC copying code in
ssl3_cbc_copy_mac. The proxy-based CBC padding test covers that as
well but it's nevertheless better to have an explicit handshake test
for mac-then-encrypt.

Reviewed-by: Andy Polyakov <appro@openssl.org>
This commit is contained in:
Emilia Kasper 2016-11-25 17:05:30 +01:00
parent c6d67f09f3
commit b3618f44a7
6 changed files with 254 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
CHANGES
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@ -18,6 +18,9 @@
*) Heartbeat support has been removed; the ABI is changed for now.
[Richard Levitte, Rich Salz]
*) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd.
[Emilia Käsper]
Changes between 1.1.0b and 1.1.0c [xx XXX xxxx]
*) ChaCha20/Poly1305 heap-buffer-overflow

4
doc/man3/SSL_CONF_cmd.pod
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@ -353,6 +353,10 @@ B<UnsafeLegacyServerConnect> permits the use of unsafe legacy renegotiation
for OpenSSL clients only. Equivalent to B<SSL_OP_LEGACY_SERVER_CONNECT>.
Set by default.
B<EncryptThenMac>: use encrypt-then-mac extension, enabled by
default. Inverse of B<SSL_OP_NO_ENCRYPT_THEN_MAC>: that is,
B<-EncryptThenMac> is the same as setting B<SSL_OP_NO_ENCRYPT_THEN_MAC>.
=item B<VerifyMode>
The B<value> argument is a comma separated list of flags to set.

1
ssl/ssl_conf.c
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@ -357,6 +357,7 @@ static int cmd_Options(SSL_CONF_CTX *cctx, const char *value)
SSL_FLAG_TBL_SRV("ECDHSingle", SSL_OP_SINGLE_ECDH_USE),
SSL_FLAG_TBL("UnsafeLegacyRenegotiation",
SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
SSL_FLAG_TBL_INV("EncryptThenMac", SSL_OP_NO_ENCRYPT_THEN_MAC),
};
if (value == NULL)
return -3;

2
test/recipes/80-test_ssl_new.t
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@ -29,7 +29,7 @@ map { s/\.in// } @conf_files;
# We hard-code the number of tests to double-check that the globbing above
# finds all files as expected.
plan tests => 18; # = scalar @conf_srcs
plan tests => 19; # = scalar @conf_srcs
# Some test results depend on the configuration of enabled protocols. We only
# verify generated sources in the default configuration.

156
test/ssl-tests/19-mac-then-encrypt.conf Normal file
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@ -0,0 +1,156 @@
# Generated with generate_ssl_tests.pl
num_tests = 6
test-0 = 0-disable-encrypt-then-mac-server-sha
test-1 = 1-disable-encrypt-then-mac-client-sha
test-2 = 2-disable-encrypt-then-mac-both-sha
test-3 = 3-disable-encrypt-then-mac-server-sha2
test-4 = 4-disable-encrypt-then-mac-client-sha2
test-5 = 5-disable-encrypt-then-mac-both-sha2
# ===========================================================
[0-disable-encrypt-then-mac-server-sha]
ssl_conf = 0-disable-encrypt-then-mac-server-sha-ssl
[0-disable-encrypt-then-mac-server-sha-ssl]
server = 0-disable-encrypt-then-mac-server-sha-server
client = 0-disable-encrypt-then-mac-server-sha-client
[0-disable-encrypt-then-mac-server-sha-server]
Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
CipherString = DEFAULT
Options = -EncryptThenMac
PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
[0-disable-encrypt-then-mac-server-sha-client]
CipherString = AES128-SHA
VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
VerifyMode = Peer
[test-0]
ExpectedResult = Success
# ===========================================================
[1-disable-encrypt-then-mac-client-sha]
ssl_conf = 1-disable-encrypt-then-mac-client-sha-ssl
[1-disable-encrypt-then-mac-client-sha-ssl]
server = 1-disable-encrypt-then-mac-client-sha-server
client = 1-disable-encrypt-then-mac-client-sha-client
[1-disable-encrypt-then-mac-client-sha-server]
Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
CipherString = DEFAULT
PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
[1-disable-encrypt-then-mac-client-sha-client]
CipherString = AES128-SHA
Options = -EncryptThenMac
VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
VerifyMode = Peer
[test-1]
ExpectedResult = Success
# ===========================================================
[2-disable-encrypt-then-mac-both-sha]
ssl_conf = 2-disable-encrypt-then-mac-both-sha-ssl
[2-disable-encrypt-then-mac-both-sha-ssl]
server = 2-disable-encrypt-then-mac-both-sha-server
client = 2-disable-encrypt-then-mac-both-sha-client
[2-disable-encrypt-then-mac-both-sha-server]
Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
CipherString = DEFAULT
Options = -EncryptThenMac
PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
[2-disable-encrypt-then-mac-both-sha-client]
CipherString = AES128-SHA
Options = -EncryptThenMac
VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
VerifyMode = Peer
[test-2]
ExpectedResult = Success
# ===========================================================
[3-disable-encrypt-then-mac-server-sha2]
ssl_conf = 3-disable-encrypt-then-mac-server-sha2-ssl
[3-disable-encrypt-then-mac-server-sha2-ssl]
server = 3-disable-encrypt-then-mac-server-sha2-server
client = 3-disable-encrypt-then-mac-server-sha2-client
[3-disable-encrypt-then-mac-server-sha2-server]
Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
CipherString = DEFAULT
Options = -EncryptThenMac
PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
[3-disable-encrypt-then-mac-server-sha2-client]
CipherString = AES128-SHA256
VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
VerifyMode = Peer
[test-3]
ExpectedResult = Success
# ===========================================================
[4-disable-encrypt-then-mac-client-sha2]
ssl_conf = 4-disable-encrypt-then-mac-client-sha2-ssl
[4-disable-encrypt-then-mac-client-sha2-ssl]
server = 4-disable-encrypt-then-mac-client-sha2-server
client = 4-disable-encrypt-then-mac-client-sha2-client
[4-disable-encrypt-then-mac-client-sha2-server]
Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
CipherString = DEFAULT
PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
[4-disable-encrypt-then-mac-client-sha2-client]
CipherString = AES128-SHA256
Options = -EncryptThenMac
VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
VerifyMode = Peer
[test-4]
ExpectedResult = Success
# ===========================================================
[5-disable-encrypt-then-mac-both-sha2]
ssl_conf = 5-disable-encrypt-then-mac-both-sha2-ssl
[5-disable-encrypt-then-mac-both-sha2-ssl]
server = 5-disable-encrypt-then-mac-both-sha2-server
client = 5-disable-encrypt-then-mac-both-sha2-client
[5-disable-encrypt-then-mac-both-sha2-server]
Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
CipherString = DEFAULT
Options = -EncryptThenMac
PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
[5-disable-encrypt-then-mac-both-sha2-client]
CipherString = AES128-SHA256
Options = -EncryptThenMac
VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
VerifyMode = Peer
[test-5]
ExpectedResult = Success

89
test/ssl-tests/19-mac-then-encrypt.conf.in Normal file
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@ -0,0 +1,89 @@
# -*- mode: perl; -*-
# Copyright 2016-2016 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
## SSL test configurations
package ssltests;
our @tests = (
{
name => "disable-encrypt-then-mac-server-sha",
server => {
"Options" => "-EncryptThenMac",
},
client => {
"CipherString" => "AES128-SHA",
},
test => {
"ExpectedResult" => "Success",
},
},
{
name => "disable-encrypt-then-mac-client-sha",
server => {
},
client => {
"CipherString" => "AES128-SHA",
"Options" => "-EncryptThenMac",
},
test => {
"ExpectedResult" => "Success",
},
},
{
name => "disable-encrypt-then-mac-both-sha",
server => {
"Options" => "-EncryptThenMac",
},
client => {
"CipherString" => "AES128-SHA",
"Options" => "-EncryptThenMac",
},
test => {
"ExpectedResult" => "Success",
},
},
{
name => "disable-encrypt-then-mac-server-sha2",
server => {
"Options" => "-EncryptThenMac",
},
client => {
"CipherString" => "AES128-SHA256",
},
test => {
"ExpectedResult" => "Success",
},
},
{
name => "disable-encrypt-then-mac-client-sha2",
server => {
},
client => {
"CipherString" => "AES128-SHA256",
"Options" => "-EncryptThenMac",
},
test => {
"ExpectedResult" => "Success",
},
},
{
name => "disable-encrypt-then-mac-both-sha2",
server => {
"Options" => "-EncryptThenMac",
},
client => {
"CipherString" => "AES128-SHA256",
"Options" => "-EncryptThenMac",
},
test => {
"ExpectedResult" => "Success",
},
},
);