- Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and example application (programs/ssl/o_p_test) (Requires OpenSSL)

- Handle encryption with private key and decryption with public key as per RFC 2313
This commit is contained in:
Paul Bakker 2012-05-19 08:43:48 +00:00
parent 50546921ac
commit e6ee41f932
5 changed files with 317 additions and 17 deletions

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@ -17,6 +17,8 @@ Features
* Added GCM suites to TLS 1.2 (RFC 5288)
* Added commandline error code convertor (util/strerror)
* Added support for Hardware Acceleration hooking in SSL/TLS
* Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and
example application (programs/ssl/o_p_test) (Requires OpenSSL)
Changes
* Removed redundant POLARSSL_DEBUG_MSG define
@ -34,6 +36,8 @@ Bugfix
* Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)
* mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
#52)
* Handle encryption with private key and decryption with public key as per
RFC 2313
Security
* Fixed potential memory corruption on miscrafted client messages (found by

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@ -386,23 +386,34 @@ int rsa_pkcs1_encrypt( rsa_context *ctx,
nb_pad = olen - 3 - ilen;
*p++ = 0;
*p++ = RSA_CRYPT;
while( nb_pad-- > 0 )
if( mode == RSA_PUBLIC )
{
int rng_dl = 100;
*p++ = RSA_CRYPT;
do {
ret = f_rng( p_rng, p, 1 );
} while( *p == 0 && --rng_dl && ret == 0 );
while( nb_pad-- > 0 )
{
int rng_dl = 100;
// Check if RNG failed to generate data
//
if( rng_dl == 0 || ret != 0)
return POLARSSL_ERR_RSA_RNG_FAILED + ret;
do {
ret = f_rng( p_rng, p, 1 );
} while( *p == 0 && --rng_dl && ret == 0 );
p++;
// Check if RNG failed to generate data
//
if( rng_dl == 0 || ret != 0)
return POLARSSL_ERR_RSA_RNG_FAILED + ret;
p++;
}
}
else
{
*p++ = RSA_SIGN;
while( nb_pad-- > 0 )
*p++ = 0xFF;
}
*p++ = 0;
memcpy( p, input, ilen );
break;
@ -475,6 +486,7 @@ int rsa_pkcs1_decrypt( rsa_context *ctx,
int ret;
size_t ilen;
unsigned char *p;
unsigned char bt;
unsigned char buf[1024];
#if defined(POLARSSL_PKCS1_V21)
unsigned char lhash[POLARSSL_MD_MAX_SIZE];
@ -501,16 +513,37 @@ int rsa_pkcs1_decrypt( rsa_context *ctx,
{
case RSA_PKCS_V15:
if( *p++ != 0 || *p++ != RSA_CRYPT )
if( *p++ != 0 )
return( POLARSSL_ERR_RSA_INVALID_PADDING );
while( *p != 0 )
bt = *p++;
if( ( bt != RSA_CRYPT && mode == RSA_PRIVATE ) ||
( bt != RSA_SIGN && mode == RSA_PUBLIC ) )
{
if( p >= buf + ilen - 1 )
return( POLARSSL_ERR_RSA_INVALID_PADDING );
}
if( bt == RSA_CRYPT )
{
while( *p != 0 && p < buf + ilen - 1 )
p++;
if( *p != 0 || p >= buf + ilen - 1 )
return( POLARSSL_ERR_RSA_INVALID_PADDING );
p++;
}
p++;
else
{
while( *p == 0xFF && p < buf + ilen - 1 )
p++;
if( *p != 0 || p >= buf + ilen - 1 )
return( POLARSSL_ERR_RSA_INVALID_PADDING );
p++;
}
break;
#if defined(POLARSSL_PKCS1_V21)

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@ -36,6 +36,10 @@ APPS = aes/aescrypt2 aes/crypt_and_hash \
x509/cert_app x509/crl_app \
x509/cert_req
ifdef OPENSSL
APPS += test/o_p_test
endif
.SILENT:
all: $(APPS)
@ -168,6 +172,10 @@ test/ssl_test: test/ssl_test.c ../library/libpolarssl.a
echo " CC test/ssl_test.c"
$(CC) $(CFLAGS) $(OFLAGS) test/ssl_test.c $(LDFLAGS) -o $@
test/o_p_test: test/o_p_test.c ../library/libpolarssl.a
echo " CC test/o_p_test.c"
$(CC) $(CFLAGS) $(OFLAGS) test/o_p_test.c $(LDFLAGS) -o $@ -lssl -lcrypto
util/strerror: util/strerror.c ../library/libpolarssl.a
echo " CC util/strerror.c"
$(CC) $(CFLAGS) $(OFLAGS) util/strerror.c $(LDFLAGS) -o $@

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@ -1,3 +1,5 @@
FIND_PACKAGE(OpenSSL)
set(libs
polarssl
)
@ -21,3 +23,13 @@ target_link_libraries(ssl_cert_test ${libs})
install(TARGETS selftest benchmark ssl_test ssl_cert_test
DESTINATION "bin"
PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
if(OPENSSL_FOUND)
add_executable(o_p_test o_p_test.c)
target_link_libraries(o_p_test ${libs} ${OPENSSL_LIBRARIES})
install(TARGETS o_p_test
DESTINATION "bin"
PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
endif(OPENSSL_FOUND)

243
programs/test/o_p_test.c Normal file
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@ -0,0 +1,243 @@
/*
* Test application that shows some PolarSSL and OpenSSL compatibility
*
* Copyright (C) 2011-2012 Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _CRT_SECURE_NO_DEPRECATE
#define _CRT_SECURE_NO_DEPRECATE 1
#endif
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <openssl/rsa.h>
#include <openssl/engine.h>
#include <openssl/pem.h>
#include <openssl/bio.h>
#include "polarssl/config.h"
#include "polarssl/x509.h"
#include "polarssl/rsa.h"
#include "polarssl/entropy.h"
#include "polarssl/ctr_drbg.h"
int main( int argc, char *argv[] )
{
int ret;
FILE *key_file;
size_t olen;
rsa_context p_rsa;
RSA *o_rsa;
entropy_context entropy;
ctr_drbg_context ctr_drbg;
unsigned char input[1024];
unsigned char p_pub_encrypted[512];
unsigned char o_pub_encrypted[512];
unsigned char p_pub_decrypted[512];
unsigned char o_pub_decrypted[512];
unsigned char p_priv_encrypted[512];
unsigned char o_priv_encrypted[512];
unsigned char p_priv_decrypted[512];
unsigned char o_priv_decrypted[512];
char *pers = "o_p_test_example";
entropy_init( &entropy );
if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
(unsigned char *) pers, strlen( pers ) ) ) != 0 )
{
printf( " failed\n ! ctr_drbg_init returned %d\n", ret );
goto exit;
}
ERR_load_crypto_strings();
ret = 1;
if( argc != 3 )
{
printf( "usage: o_p_test <keyfile with private_key> <string of max 100 characters>\n" );
#ifdef WIN32
printf( "\n" );
#endif
goto exit;
}
printf( " . Reading private key from %s into PolarSSL ...", argv[1] );
fflush( stdout );
rsa_init( &p_rsa, RSA_PKCS_V15, 0 );
if( x509parse_keyfile( &p_rsa, argv[1], NULL ) != 0 )
{
ret = 1;
printf( " failed\n ! Could not load key.\n\n" );
goto exit;
}
printf( " passed\n");
printf( " . Reading private key from %s into OpenSSL ...", argv[1] );
fflush( stdout );
key_file = fopen( argv[1], "r" );
o_rsa = PEM_read_RSAPrivateKey(key_file, 0, 0, 0);
fclose(key_file);
if( o_rsa == NULL )
{
ret = 1;
printf( " failed\n ! Could not load key.\n\n" );
goto exit;
}
printf( " passed\n");
printf( "\n" );
if( strlen( argv[1] ) > 100 )
{
printf( " Input data larger than 100 characters.\n\n" );
goto exit;
}
memcpy( input, argv[2], strlen( argv[2] ) );
/*
* Calculate the RSA encryption with public key.
*/
printf( " . Generating the RSA encrypted value with PolarSSL (RSA_PUBLIC) ..." );
fflush( stdout );
if( ( ret = rsa_pkcs1_encrypt( &p_rsa, ctr_drbg_random, &ctr_drbg, RSA_PUBLIC, strlen( argv[1] ), input, p_pub_encrypted ) ) != 0 )
{
printf( " failed\n ! rsa_pkcs1_encrypt returned %d\n\n", ret );
goto exit;
}
else
printf( " passed\n");
printf( " . Generating the RSA encrypted value with OpenSSL (PUBLIC) ..." );
fflush( stdout );
if( ( ret = RSA_public_encrypt( strlen( argv[1] ), input, o_pub_encrypted, o_rsa, RSA_PKCS1_PADDING ) ) == -1 )
{
unsigned long code = ERR_get_error();
printf( " failed\n ! RSA_public_encrypt returned %d %s\n\n", ret, ERR_error_string( code, NULL ) );
goto exit;
}
else
printf( " passed\n");
/*
* Calculate the RSA encryption with private key.
*/
printf( " . Generating the RSA encrypted value with PolarSSL (RSA_PRIVATE) ..." );
fflush( stdout );
if( ( ret = rsa_pkcs1_encrypt( &p_rsa, ctr_drbg_random, &ctr_drbg, RSA_PRIVATE, strlen( argv[1] ), input, p_priv_encrypted ) ) != 0 )
{
printf( " failed\n ! rsa_pkcs1_encrypt returned %d\n\n", ret );
goto exit;
}
else
printf( " passed\n");
printf( " . Generating the RSA encrypted value with OpenSSL (PRIVATE) ..." );
fflush( stdout );
if( ( ret = RSA_private_encrypt( strlen( argv[1] ), input, o_priv_encrypted, o_rsa, RSA_PKCS1_PADDING ) ) == -1 )
{
unsigned long code = ERR_get_error();
printf( " failed\n ! RSA_private_encrypt returned %d %s\n\n", ret, ERR_error_string( code, NULL ) );
goto exit;
}
else
printf( " passed\n");
printf( "\n" );
/*
* Calculate the RSA decryption with private key.
*/
printf( " . Generating the RSA decrypted value for OpenSSL (PUBLIC) with PolarSSL (PRIVATE) ..." );
fflush( stdout );
if( ( ret = rsa_pkcs1_decrypt( &p_rsa, RSA_PRIVATE, &olen, o_pub_encrypted, p_pub_decrypted, 1024 ) ) != 0 )
{
printf( " failed\n ! rsa_pkcs1_decrypt returned %d\n\n", ret );
}
else
printf( " passed\n");
printf( " . Generating the RSA decrypted value for PolarSSL (PUBLIC) with OpenSSL (PRIVATE) ..." );
fflush( stdout );
if( ( ret = RSA_private_decrypt( p_rsa.len, p_pub_encrypted, o_pub_decrypted, o_rsa, RSA_PKCS1_PADDING ) ) == -1 )
{
unsigned long code = ERR_get_error();
printf( " failed\n ! RSA_private_decrypt returned %d %s\n\n", ret, ERR_error_string( code, NULL ) );
}
else
printf( " passed\n");
/*
* Calculate the RSA decryption with public key.
*/
printf( " . Generating the RSA decrypted value for OpenSSL (PRIVATE) with PolarSSL (PUBLIC) ..." );
fflush( stdout );
if( ( ret = rsa_pkcs1_decrypt( &p_rsa, RSA_PUBLIC, &olen, o_priv_encrypted, p_priv_decrypted, 1024 ) ) != 0 )
{
printf( " failed\n ! rsa_pkcs1_decrypt returned %d\n\n", ret );
}
else
printf( " passed\n");
printf( " . Generating the RSA decrypted value for PolarSSL (PRIVATE) with OpenSSL (PUBLIC) ..." );
fflush( stdout );
if( ( ret = RSA_public_decrypt( p_rsa.len, p_priv_encrypted, o_priv_decrypted, o_rsa, RSA_PKCS1_PADDING ) ) == -1 )
{
unsigned long code = ERR_get_error();
printf( " failed\n ! RSA_public_decrypt returned %d %s\n\n", ret, ERR_error_string( code, NULL ) );
}
else
printf( " passed\n");
printf( "\n" );
printf( "String value (OpenSSL Public Encrypt, PolarSSL Private Decrypt): '%s'\n", p_pub_decrypted );
printf( "String value (PolarSSL Public Encrypt, OpenSSL Private Decrypt): '%s'\n", o_pub_decrypted );
printf( "String value (OpenSSL Private Encrypt, PolarSSL Public Decrypt): '%s'\n", p_priv_decrypted );
printf( "String value (PolarSSL Private Encrypt, OpenSSL Public Decrypt): '%s'\n", o_priv_decrypted );
exit:
#ifdef WIN32
printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}