path: root/engines/e_padlock.c

/* 
 * Support for VIA PadLock Advanced Cryptography Engine (ACE)
 * Written by Michal Ludvig <michal@logix.cz>
 *            http://www.logix.cz/michal
 *
 * Big thanks to Andy Polyakov for a help with optimization, 
 * assembler fixes, port to MS Windows and a lot of other 
 * valuable work on this engine!
 */

/* ====================================================================
 * Copyright (c) 1999-2001 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */


#include <stdio.h>
#include <string.h>

#include <openssl/opensslconf.h>
#include <openssl/crypto.h>
#include <openssl/dso.h>
#include <openssl/engine.h>
#include <openssl/evp.h>
#ifndef OPENSSL_NO_AES
#include <openssl/aes.h>
#endif
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/modes.h>

#ifndef OPENSSL_NO_HW
#ifndef OPENSSL_NO_HW_PADLOCK

/* Attempt to have a single source for both 0.9.7 and 0.9.8 :-) */
#if (OPENSSL_VERSION_NUMBER >= 0x00908000L)
#  ifndef OPENSSL_NO_DYNAMIC_ENGINE
#    define DYNAMIC_ENGINE
#  endif
#elif (OPENSSL_VERSION_NUMBER >= 0x00907000L)
#  ifdef ENGINE_DYNAMIC_SUPPORT
#    define DYNAMIC_ENGINE
#  endif
#else
#  error "Only OpenSSL >= 0.9.7 is supported"
#endif

/* VIA PadLock AES is available *ONLY* on some x86 CPUs.
   Not only that it doesn't exist elsewhere, but it
   even can't be compiled on other platforms! */
 
#undef COMPILE_HW_PADLOCK
#if !defined(I386_ONLY) && !defined(OPENSSL_NO_ASM)
# if	defined(__i386__) || defined(__i386) || \
	defined(__x86_64__) || defined(__x86_64) || \
	defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || \
	defined(__INTEL__)
#  define COMPILE_HW_PADLOCK
#  ifdef OPENSSL_NO_DYNAMIC_ENGINE
static ENGINE *ENGINE_padlock (void);
#  endif
# endif
#endif

#ifdef OPENSSL_NO_DYNAMIC_ENGINE

void ENGINE_load_padlock (void)
{
/* On non-x86 CPUs it just returns. */
#ifdef COMPILE_HW_PADLOCK
	ENGINE *toadd = ENGINE_padlock ();
	if (!toadd) return;
	ENGINE_add (toadd);
	ENGINE_free (toadd);
	ERR_clear_error ();
#endif
}

#endif

#ifdef COMPILE_HW_PADLOCK

/* Function for ENGINE detection and control */
static int padlock_available(void);
static int padlock_init(ENGINE *e);

/* RNG Stuff */
static RAND_METHOD padlock_rand;

/* Cipher Stuff */
#ifndef OPENSSL_NO_AES
static int padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid);
#endif

/* Engine names */
static const char *padlock_id = "padlock";
static char padlock_name[100];

/* Available features */
static int padlock_use_ace = 0;	/* Advanced Cryptography Engine */
static int padlock_use_rng = 0;	/* Random Number Generator */

/* ===== Engine "management" functions ===== */

/* Prepare the ENGINE structure for registration */
static int
padlock_bind_helper(ENGINE *e)
{
	/* Check available features */
	padlock_available();

#if 1	/* disable RNG for now, see commentary in vicinity of RNG code */
	padlock_use_rng=0;
#endif

	/* Generate a nice engine name with available features */
	BIO_snprintf(padlock_name, sizeof(padlock_name),
		"VIA PadLock (%s, %s)", 
		 padlock_use_rng ? "RNG" : "no-RNG",
		 padlock_use_ace ? "ACE" : "no-ACE");

	/* Register everything or return with an error */ 
	if (!ENGINE_set_id(e, padlock_id) ||
	    !ENGINE_set_name(e, padlock_name) ||

	    !ENGINE_set_init_function(e, padlock_init) ||
#ifndef OPENSSL_NO_AES
	    (padlock_use_ace && !ENGINE_set_ciphers (e, padlock_ciphers)) ||
#endif
	    (padlock_use_rng && !ENGINE_set_RAND (e, &padlock_rand))) {
		return 0;
	}

	/* Everything looks good */
	return 1;
}

#ifdef OPENSSL_NO_DYNAMIC_ENGINE
/* Constructor */
static ENGINE *
ENGINE_padlock(void)
{
	ENGINE *eng = ENGINE_new();

	if (!eng) {
		return NULL;
	}

	if (!padlock_bind_helper(eng)) {
		ENGINE_free(eng);
		return NULL;
	}

	return eng;
}
#endif

/* Check availability of the engine */
static int
padlock_init(ENGINE *e)
{
	return (padlock_use_rng || padlock_use_ace);
}

/* This stuff is needed if this ENGINE is being compiled into a self-contained
 * shared-library.
 */
#ifdef DYNAMIC_ENGINE
static int
padlock_bind_fn(ENGINE *e, const char *id)
{
	if (id && (strcmp(id, padlock_id) != 0)) {
		return 0;
	}

	if (!padlock_bind_helper(e))  {
		return 0;
	}

	return 1;
}

IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN (padlock_bind_fn)
#endif /* DYNAMIC_ENGINE */

/* ===== Here comes the "real" engine ===== */

#ifndef OPENSSL_NO_AES
/* Some AES-related constants */
#define AES_BLOCK_SIZE		16
#define AES_KEY_SIZE_128	16
#define AES_KEY_SIZE_192	24
#define AES_KEY_SIZE_256	32

/* Here we store the status information relevant to the 
   current context. */
/* BIG FAT WARNING:
 * 	Inline assembler in PADLOCK_XCRYPT_ASM()
 * 	depends on the order of items in this structure.
 * 	Don't blindly modify, reorder, etc!
 */
struct padlock_cipher_data
{
	unsigned char iv[AES_BLOCK_SIZE];	/* Initialization vector */
	union {	unsigned int pad[4];
		struct {
			int rounds:4;
			int dgst:1;	/* n/a in C3 */
			int align:1;	/* n/a in C3 */
			int ciphr:1;	/* n/a in C3 */
			unsigned int keygen:1;
			int interm:1;
			unsigned int encdec:1;
			int ksize:2;
		} b;
	} cword;		/* Control word */
	AES_KEY ks;		/* Encryption key */
};
#endif

/* Interface to assembler module */
unsigned int padlock_capability();
void padlock_key_bswap(AES_KEY *key);
void padlock_verify_context(struct padlock_cipher_data *ctx);
void padlock_reload_key();
void padlock_aes_block(void *out, const void *inp,
		struct padlock_cipher_data *ctx);
int  padlock_ecb_encrypt(void *out, const void *inp,
		struct padlock_cipher_data *ctx, size_t len);
int  padlock_cbc_encrypt(void *out, const void *inp,
		struct padlock_cipher_data *ctx, size_t len);
int  padlock_cfb_en