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Replace OpenSSL base64 impl with a simple direct impl.

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Unit tests, too.
This commit is contained in:
John Hood
2015-10-04 20:16:25 -04:00
parent 1307dc4a0f
commit db311f92f7
8 changed files with 256 additions and 88 deletions
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src/tests/Makefile.am
+12 -2
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@@ -16,12 +16,16 @@ displaytests = \
unicode-combine-fallback-assert.test \
unicode-later-combining.test
check_PROGRAMS = ocb-aes encrypt-decrypt
TESTS = ocb-aes encrypt-decrypt $(displaytests)
check_PROGRAMS = ocb-aes encrypt-decrypt base64
TESTS = ocb-aes encrypt-decrypt base64 $(displaytests)
XFAIL_TESTS = \
e2e-failure.test \
emulation-back-tab.test
base64_vector.cc: $(srcdir)/genbase64.pl
$(AM_V_GEN)echo '#include "base64_vector.h"' > base64_vector.cc || rm base64_vector.cc
$(AM_V_GEN)perl $(srcdir)/genbase64.pl >> base64_vector.cc || rm base64_vector.cc
ocb_aes_SOURCES = ocb-aes.cc test_utils.cc test_utils.h
ocb_aes_CPPFLAGS = -I$(srcdir)/../crypto -I$(srcdir)/../util
ocb_aes_LDADD = ../crypto/libmoshcrypto.a ../util/libmoshutil.a $(OPENSSL_LIBS)
@@ -30,7 +34,13 @@ encrypt_decrypt_SOURCES = encrypt-decrypt.cc test_utils.cc test_utils.h
encrypt_decrypt_CPPFLAGS = -I$(srcdir)/../crypto -I$(srcdir)/../util
encrypt_decrypt_LDADD = ../crypto/libmoshcrypto.a ../util/libmoshutil.a $(OPENSSL_LIBS)
base64_SOURCES = base64.cc base64_vector.cc base64_vector.h genbase64.pl
base64_CPPFLAGS = $(ocb_aes_CPPFLAGS)
base64_LDADD = $(ocb_aes_LDADD)
clean-local: clean-local-check
.PHONY: clean-local-check
clean-local-check:
-for i in $(displaytests); do rm -rf $$i.d/; done
CLEANFILES = base64_vector.cc
src/tests/base64.cc
+141
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@@ -0,0 +1,141 @@
/*
Mosh: the mobile shell
Copyright 2012 Keith Winstein
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
In addition, as a special exception, the copyright holders give
permission to link the code of portions of this program with the
OpenSSL library under certain conditions as described in each
individual source file, and distribute linked combinations including
the two.
You must obey the GNU General Public License in all respects for all
of the code used other than OpenSSL. If you modify file(s) with this
exception, you may extend this exception to your version of the
file(s), but you are not obligated to do so. If you do not wish to do
so, delete this exception statement from your version. If you delete
this exception statement from all source files in the program, then
also delete it here.
*/
/* Test suite for the OCB-AES reference implementation included with Mosh.
This tests cryptographic primitives implemented by others. It uses the
same interfaces and indeed the same compiled object code as the Mosh
client and server. It does not particularly test any code written for
the Mosh project. */
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include "base64.h"
#include "base64_vector.h"
#include "crypto.h"
#include "prng.h"
#include "fatal_assert.h"
// #include "test_utils.h"
#define KEY_LEN 16
#define NONCE_LEN 12
#define TAG_LEN 16
bool verbose = false;
static void test_base64( void ) {
/* run through a test vector */
char encoded[25];
uint8_t decoded[16];
size_t b64_len = 24;
size_t raw_len = 16;
for ( base64_test_row *row = static_base64_vector; *row->native != '\0'; row++ ) {
memset(encoded, '\0', sizeof encoded);
memset(decoded, '\0', sizeof decoded);
base64_encode(static_cast<const uint8_t *>(row->native), raw_len, encoded, b64_len);
fatal_assert( b64_len == 24 );
fatal_assert( !memcmp(row->encoded, encoded, sizeof encoded));
fatal_assert( base64_decode(row->encoded, b64_len, decoded, &raw_len ));
fatal_assert( raw_len == 16 );
fatal_assert( !memcmp(row->native, decoded, sizeof decoded));
}
if ( verbose ) {
printf( "validation PASSED\n" );
}
/* try 0..255 in the last byte; make sure the final two characters are output properly */
uint8_t source[16];
memset(source, '\0', sizeof source);
for ( int i = 0; i < 256; i++ ) {
source[15] = i;
base64_encode(source, raw_len, encoded, b64_len);
fatal_assert( b64_len == 24 );
fatal_assert( base64_decode(encoded, b64_len, decoded, &raw_len ));
fatal_assert( raw_len == 16 );
fatal_assert( !memcmp(source, decoded, sizeof decoded));
}
if ( verbose ) {
printf( "last-byte PASSED\n" );
}
/* randomly try keys */
PRNG prng;
for ( int i = 0; i < ( 1<<17 ); i++ ) {
Base64Key key1(prng);
Base64Key key2(key1.printable_key());
fatal_assert( key1.printable_key() == key2.printable_key() && !memcmp(key1.data(), key2.data(), 16 ));
}
if ( verbose ) {
printf( "random PASSED\n" );
}
/* test bad keys */
const char *bad_keys[] = {
"",
"AAAAAAAAAAAAAAAAAAAAAA",
"AAAAAAAAAAAAAAAAAAAAAA=",
"AAAAAAAAAAAAAAAAAAAAA==",
"AAAAAAAAAAAAAAAAAAAAAAA==",
"AAAAAAAAAAAAAAAAAAAAAAAA==",
"AAAAAAAAAAAAAAAAAAAAAA~=",
"AAAAAAAAAAAAAAAAAAAAAA=~",
"~AAAAAAAAAAAAAAAAAAAAA==",
"AAAAAAAAAAAAAAAAAAAA~A==",
"AAAAAAAAAAAAAAAAAAAAA~==",
"AAAAAAAAAA~AAAAAAAAAAA==",
"AAAAAAAAAA==",
NULL,
};
for ( const char **key = bad_keys; *key != NULL; key++ ) {
b64_len = 24;
raw_len = 16;
fatal_assert( !base64_decode(*key, b64_len, decoded, &raw_len ));
}
if ( verbose ) {
printf( "bad-keys PASSED\n" );
}
}
int main( int argc, char *argv[] )
{
if ( argc >= 2 && strcmp( argv[ 1 ], "-v" ) == 0 ) {
verbose = true;
}
test_base64();
return 0;
}
src/tests/base64_vector.h
+3
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@@ -0,0 +1,3 @@
struct base64_test_row { const unsigned char native[17]; const char encoded[25]; };
typedef base64_test_row *base64_test_vector;
extern base64_test_row static_base64_vector[];
src/tests/genbase64.pl
Executable
+28
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@@ -0,0 +1,28 @@
#!/usr/bin/perl
use strict;
use warnings;
use MIME::Base64;
my @vectors = (
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff",
"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00",
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa",
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\x55\x55\x55\x55\x55\x55\x55\x55",
"\x55\x55\x55\x55\x55\x55\x55\x55\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa",
"\x01\x02\x04\x08\x10\x20\x40\x80\xfe\xfd\xfb\xf7\xef\xdf\xbf\x7f",
);
print 'base64_test_row static_base64_vector[] = {' . "\n";
for my $v (@vectors) {
print ' { "';
my @chars = split '', $v;
for my $c (@chars) {
printf "\\x%02x", ord($c);
}
print '", "' . encode_base64($v, "") . '" },' . "\n";
}
print ' { "", "" }' . "\n";
print "};\n";