mirror of
https://github.com/openssl/openssl.git
synced 2024-12-09 05:51:54 +08:00
0f113f3ee4
Reviewed-by: Tim Hudson <tjh@openssl.org>
802 lines
24 KiB
C
802 lines
24 KiB
C
/*-
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* Support for VIA PadLock Advanced Cryptography Engine (ACE)
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* Written by Michal Ludvig <michal@logix.cz>
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* http://www.logix.cz/michal
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*
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* Big thanks to Andy Polyakov for a help with optimization,
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* assembler fixes, port to MS Windows and a lot of other
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* valuable work on this engine!
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*/
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/* ====================================================================
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* Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <openssl/opensslconf.h>
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#include <openssl/crypto.h>
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#include <openssl/dso.h>
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#include <openssl/engine.h>
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#include <openssl/evp.h>
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#ifndef OPENSSL_NO_AES
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# include <openssl/aes.h>
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#endif
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#include <openssl/rand.h>
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#include <openssl/err.h>
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#include <openssl/modes.h>
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#ifndef OPENSSL_NO_HW
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# ifndef OPENSSL_NO_HW_PADLOCK
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/* Attempt to have a single source for both 0.9.7 and 0.9.8 :-) */
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# if (OPENSSL_VERSION_NUMBER >= 0x00908000L)
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# ifndef OPENSSL_NO_DYNAMIC_ENGINE
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# define DYNAMIC_ENGINE
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# endif
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# elif (OPENSSL_VERSION_NUMBER >= 0x00907000L)
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# ifdef ENGINE_DYNAMIC_SUPPORT
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# define DYNAMIC_ENGINE
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# endif
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# else
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# error "Only OpenSSL >= 0.9.7 is supported"
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# endif
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/*
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* VIA PadLock AES is available *ONLY* on some x86 CPUs. Not only that it
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* doesn't exist elsewhere, but it even can't be compiled on other platforms!
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*/
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# undef COMPILE_HW_PADLOCK
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# if !defined(I386_ONLY) && !defined(OPENSSL_NO_ASM)
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# if defined(__i386__) || defined(__i386) || \
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defined(__x86_64__) || defined(__x86_64) || \
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defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || \
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defined(__INTEL__)
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# define COMPILE_HW_PADLOCK
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# ifdef OPENSSL_NO_DYNAMIC_ENGINE
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static ENGINE *ENGINE_padlock(void);
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# endif
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# endif
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# endif
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# ifdef OPENSSL_NO_DYNAMIC_ENGINE
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void ENGINE_load_padlock(void)
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{
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/* On non-x86 CPUs it just returns. */
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# ifdef COMPILE_HW_PADLOCK
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ENGINE *toadd = ENGINE_padlock();
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if (!toadd)
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return;
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ENGINE_add(toadd);
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ENGINE_free(toadd);
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ERR_clear_error();
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# endif
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}
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# endif
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# ifdef COMPILE_HW_PADLOCK
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/* Function for ENGINE detection and control */
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static int padlock_available(void);
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static int padlock_init(ENGINE *e);
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/* RNG Stuff */
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static RAND_METHOD padlock_rand;
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/* Cipher Stuff */
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# ifndef OPENSSL_NO_AES
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static int padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
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const int **nids, int nid);
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# endif
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/* Engine names */
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static const char *padlock_id = "padlock";
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static char padlock_name[100];
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/* Available features */
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static int padlock_use_ace = 0; /* Advanced Cryptography Engine */
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static int padlock_use_rng = 0; /* Random Number Generator */
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/* ===== Engine "management" functions ===== */
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/* Prepare the ENGINE structure for registration */
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static int padlock_bind_helper(ENGINE *e)
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{
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/* Check available features */
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padlock_available();
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# if 1 /* disable RNG for now, see commentary in
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* vicinity of RNG code */
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padlock_use_rng = 0;
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# endif
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/* Generate a nice engine name with available features */
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BIO_snprintf(padlock_name, sizeof(padlock_name),
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"VIA PadLock (%s, %s)",
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padlock_use_rng ? "RNG" : "no-RNG",
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padlock_use_ace ? "ACE" : "no-ACE");
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/* Register everything or return with an error */
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if (!ENGINE_set_id(e, padlock_id) ||
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!ENGINE_set_name(e, padlock_name) ||
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!ENGINE_set_init_function(e, padlock_init) ||
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# ifndef OPENSSL_NO_AES
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(padlock_use_ace && !ENGINE_set_ciphers(e, padlock_ciphers)) ||
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# endif
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(padlock_use_rng && !ENGINE_set_RAND(e, &padlock_rand))) {
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return 0;
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}
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/* Everything looks good */
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return 1;
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}
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# ifdef OPENSSL_NO_DYNAMIC_ENGINE
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/* Constructor */
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static ENGINE *ENGINE_padlock(void)
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{
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ENGINE *eng = ENGINE_new();
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if (!eng) {
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return NULL;
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}
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if (!padlock_bind_helper(eng)) {
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ENGINE_free(eng);
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return NULL;
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}
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return eng;
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}
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# endif
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/* Check availability of the engine */
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static int padlock_init(ENGINE *e)
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{
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return (padlock_use_rng || padlock_use_ace);
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}
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/*
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* This stuff is needed if this ENGINE is being compiled into a
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* self-contained shared-library.
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*/
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# ifdef DYNAMIC_ENGINE
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static int padlock_bind_fn(ENGINE *e, const char *id)
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{
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if (id && (strcmp(id, padlock_id) != 0)) {
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return 0;
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}
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if (!padlock_bind_helper(e)) {
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return 0;
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}
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return 1;
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}
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IMPLEMENT_DYNAMIC_CHECK_FN()
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IMPLEMENT_DYNAMIC_BIND_FN(padlock_bind_fn)
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# endif /* DYNAMIC_ENGINE */
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/* ===== Here comes the "real" engine ===== */
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# ifndef OPENSSL_NO_AES
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/* Some AES-related constants */
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# define AES_BLOCK_SIZE 16
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# define AES_KEY_SIZE_128 16
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# define AES_KEY_SIZE_192 24
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# define AES_KEY_SIZE_256 32
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/*
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* Here we store the status information relevant to the current context.
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*/
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/*
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* BIG FAT WARNING: Inline assembler in PADLOCK_XCRYPT_ASM() depends on
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* the order of items in this structure. Don't blindly modify, reorder,
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* etc!
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*/
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struct padlock_cipher_data {
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unsigned char iv[AES_BLOCK_SIZE]; /* Initialization vector */
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union {
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unsigned int pad[4];
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struct {
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int rounds:4;
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int dgst:1; /* n/a in C3 */
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int align:1; /* n/a in C3 */
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int ciphr:1; /* n/a in C3 */
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unsigned int keygen:1;
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int interm:1;
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unsigned int encdec:1;
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int ksize:2;
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} b;
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} cword; /* Control word */
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AES_KEY ks; /* Encryption key */
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};
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# endif
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/* Interface to assembler module */
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unsigned int padlock_capability();
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void padlock_key_bswap(AES_KEY *key);
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void padlock_verify_context(struct padlock_cipher_data *ctx);
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void padlock_reload_key();
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void padlock_aes_block(void *out, const void *inp,
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struct padlock_cipher_data *ctx);
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int padlock_ecb_encrypt(void *out, const void *inp,
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struct padlock_cipher_data *ctx, size_t len);
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int padlock_cbc_encrypt(void *out, const void *inp,
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struct padlock_cipher_data *ctx, size_t len);
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int padlock_cfb_encrypt(void *out, const void *inp,
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struct padlock_cipher_data *ctx, size_t len);
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int padlock_ofb_encrypt(void *out, const void *inp,
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struct padlock_cipher_data *ctx, size_t len);
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int padlock_ctr32_encrypt(void *out, const void *inp,
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struct padlock_cipher_data *ctx, size_t len);
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int padlock_xstore(void *out, int edx);
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void padlock_sha1_oneshot(void *ctx, const void *inp, size_t len);
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void padlock_sha1(void *ctx, const void *inp, size_t len);
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void padlock_sha256_oneshot(void *ctx, const void *inp, size_t len);
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void padlock_sha256(void *ctx, const void *inp, size_t len);
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/*
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* Load supported features of the CPU to see if the PadLock is available.
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*/
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static int padlock_available(void)
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{
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unsigned int edx = padlock_capability();
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/* Fill up some flags */
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padlock_use_ace = ((edx & (0x3 << 6)) == (0x3 << 6));
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padlock_use_rng = ((edx & (0x3 << 2)) == (0x3 << 2));
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return padlock_use_ace + padlock_use_rng;
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}
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/* ===== AES encryption/decryption ===== */
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# ifndef OPENSSL_NO_AES
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# if defined(NID_aes_128_cfb128) && ! defined (NID_aes_128_cfb)
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# define NID_aes_128_cfb NID_aes_128_cfb128
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# endif
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# if defined(NID_aes_128_ofb128) && ! defined (NID_aes_128_ofb)
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# define NID_aes_128_ofb NID_aes_128_ofb128
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# endif
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# if defined(NID_aes_192_cfb128) && ! defined (NID_aes_192_cfb)
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# define NID_aes_192_cfb NID_aes_192_cfb128
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# endif
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# if defined(NID_aes_192_ofb128) && ! defined (NID_aes_192_ofb)
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# define NID_aes_192_ofb NID_aes_192_ofb128
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# endif
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# if defined(NID_aes_256_cfb128) && ! defined (NID_aes_256_cfb)
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# define NID_aes_256_cfb NID_aes_256_cfb128
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# endif
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# if defined(NID_aes_256_ofb128) && ! defined (NID_aes_256_ofb)
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# define NID_aes_256_ofb NID_aes_256_ofb128
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# endif
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/* List of supported ciphers. */
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static const int padlock_cipher_nids[] = {
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NID_aes_128_ecb,
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NID_aes_128_cbc,
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NID_aes_128_cfb,
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NID_aes_128_ofb,
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NID_aes_128_ctr,
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NID_aes_192_ecb,
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NID_aes_192_cbc,
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NID_aes_192_cfb,
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NID_aes_192_ofb,
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NID_aes_192_ctr,
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NID_aes_256_ecb,
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NID_aes_256_cbc,
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NID_aes_256_cfb,
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NID_aes_256_ofb,
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NID_aes_256_ctr
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};
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static int padlock_cipher_nids_num = (sizeof(padlock_cipher_nids) /
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sizeof(padlock_cipher_nids[0]));
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/* Function prototypes ... */
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static int padlock_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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# define NEAREST_ALIGNED(ptr) ( (unsigned char *)(ptr) + \
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( (0x10 - ((size_t)(ptr) & 0x0F)) & 0x0F ) )
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# define ALIGNED_CIPHER_DATA(ctx) ((struct padlock_cipher_data *)\
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NEAREST_ALIGNED(ctx->cipher_data))
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static int
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padlock_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
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const unsigned char *in_arg, size_t nbytes)
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{
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return padlock_ecb_encrypt(out_arg, in_arg,
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ALIGNED_CIPHER_DATA(ctx), nbytes);
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}
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static int
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padlock_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
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const unsigned char *in_arg, size_t nbytes)
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{
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struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
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int ret;
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memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
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if ((ret = padlock_cbc_encrypt(out_arg, in_arg, cdata, nbytes)))
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memcpy(ctx->iv, cdata->iv, AES_BLOCK_SIZE);
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return ret;
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}
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static int
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padlock_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
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const unsigned char *in_arg, size_t nbytes)
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{
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struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
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size_t chunk;
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if ((chunk = ctx->num)) { /* borrow chunk variable */
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unsigned char *ivp = ctx->iv;
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if (chunk >= AES_BLOCK_SIZE)
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return 0; /* bogus value */
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if (ctx->encrypt)
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while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
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ivp[chunk] = *(out_arg++) = *(in_arg++) ^ ivp[chunk];
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chunk++, nbytes--;
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} else
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while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
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unsigned char c = *(in_arg++);
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*(out_arg++) = c ^ ivp[chunk];
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ivp[chunk++] = c, nbytes--;
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}
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ctx->num = chunk % AES_BLOCK_SIZE;
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}
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if (nbytes == 0)
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return 1;
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memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
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if ((chunk = nbytes & ~(AES_BLOCK_SIZE - 1))) {
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if (!padlock_cfb_encrypt(out_arg, in_arg, cdata, chunk))
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return 0;
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nbytes -= chunk;
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}
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if (nbytes) {
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unsigned char *ivp = cdata->iv;
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out_arg += chunk;
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in_arg += chunk;
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ctx->num = nbytes;
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if (cdata->cword.b.encdec) {
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cdata->cword.b.encdec = 0;
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padlock_reload_key();
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padlock_aes_block(ivp, ivp, cdata);
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cdata->cword.b.encdec = 1;
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padlock_reload_key();
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while (nbytes) {
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unsigned char c = *(in_arg++);
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*(out_arg++) = c ^ *ivp;
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*(ivp++) = c, nbytes--;
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}
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} else {
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padlock_reload_key();
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padlock_aes_block(ivp, ivp, cdata);
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padlock_reload_key();
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while (nbytes) {
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*ivp = *(out_arg++) = *(in_arg++) ^ *ivp;
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ivp++, nbytes--;
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}
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}
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}
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memcpy(ctx->iv, cdata->iv, AES_BLOCK_SIZE);
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return 1;
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}
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static int
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padlock_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
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const unsigned char *in_arg, size_t nbytes)
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{
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struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
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size_t chunk;
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/*
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* ctx->num is maintained in byte-oriented modes, such as CFB and OFB...
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*/
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if ((chunk = ctx->num)) { /* borrow chunk variable */
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unsigned char *ivp = ctx->iv;
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if (chunk >= AES_BLOCK_SIZE)
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return 0; /* bogus value */
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while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
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*(out_arg++) = *(in_arg++) ^ ivp[chunk];
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chunk++, nbytes--;
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}
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ctx->num = chunk % AES_BLOCK_SIZE;
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}
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if (nbytes == 0)
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return 1;
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memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
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if ((chunk = nbytes & ~(AES_BLOCK_SIZE - 1))) {
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if (!padlock_ofb_encrypt(out_arg, in_arg, cdata, chunk))
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return 0;
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nbytes -= chunk;
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}
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if (nbytes) {
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unsigned char *ivp = cdata->iv;
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out_arg += chunk;
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|
in_arg += chunk;
|
|
ctx->num = nbytes;
|
|
padlock_reload_key(); /* empirically found */
|
|
padlock_aes_block(ivp, ivp, cdata);
|
|
padlock_reload_key(); /* empirically found */
|
|
while (nbytes) {
|
|
*(out_arg++) = *(in_arg++) ^ *ivp;
|
|
ivp++, nbytes--;
|
|
}
|
|
}
|
|
|
|
memcpy(ctx->iv, cdata->iv, AES_BLOCK_SIZE);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void padlock_ctr32_encrypt_glue(const unsigned char *in,
|
|
unsigned char *out, size_t blocks,
|
|
struct padlock_cipher_data *ctx,
|
|
const unsigned char *ivec)
|
|
{
|
|
memcpy(ctx->iv, ivec, AES_BLOCK_SIZE);
|
|
padlock_ctr32_encrypt(out, in, ctx, AES_BLOCK_SIZE * blocks);
|
|
}
|
|
|
|
static int
|
|
padlock_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
|
|
const unsigned char *in_arg, size_t nbytes)
|
|
{
|
|
struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
|
|
unsigned int num = ctx->num;
|
|
|
|
CRYPTO_ctr128_encrypt_ctr32(in_arg, out_arg, nbytes,
|
|
cdata, ctx->iv, ctx->buf, &num,
|
|
(ctr128_f) padlock_ctr32_encrypt_glue);
|
|
|
|
ctx->num = (size_t)num;
|
|
return 1;
|
|
}
|
|
|
|
# define EVP_CIPHER_block_size_ECB AES_BLOCK_SIZE
|
|
# define EVP_CIPHER_block_size_CBC AES_BLOCK_SIZE
|
|
# define EVP_CIPHER_block_size_OFB 1
|
|
# define EVP_CIPHER_block_size_CFB 1
|
|
# define EVP_CIPHER_block_size_CTR 1
|
|
|
|
/*
|
|
* Declaring so many ciphers by hand would be a pain. Instead introduce a bit
|
|
* of preprocessor magic :-)
|
|
*/
|
|
# define DECLARE_AES_EVP(ksize,lmode,umode) \
|
|
static const EVP_CIPHER padlock_aes_##ksize##_##lmode = { \
|
|
NID_aes_##ksize##_##lmode, \
|
|
EVP_CIPHER_block_size_##umode, \
|
|
AES_KEY_SIZE_##ksize, \
|
|
AES_BLOCK_SIZE, \
|
|
0 | EVP_CIPH_##umode##_MODE, \
|
|
padlock_aes_init_key, \
|
|
padlock_##lmode##_cipher, \
|
|
NULL, \
|
|
sizeof(struct padlock_cipher_data) + 16, \
|
|
EVP_CIPHER_set_asn1_iv, \
|
|
EVP_CIPHER_get_asn1_iv, \
|
|
NULL, \
|
|
NULL \
|
|
}
|
|
|
|
DECLARE_AES_EVP(128, ecb, ECB);
|
|
DECLARE_AES_EVP(128, cbc, CBC);
|
|
DECLARE_AES_EVP(128, cfb, CFB);
|
|
DECLARE_AES_EVP(128, ofb, OFB);
|
|
DECLARE_AES_EVP(128, ctr, CTR);
|
|
|
|
DECLARE_AES_EVP(192, ecb, ECB);
|
|
DECLARE_AES_EVP(192, cbc, CBC);
|
|
DECLARE_AES_EVP(192, cfb, CFB);
|
|
DECLARE_AES_EVP(192, ofb, OFB);
|
|
DECLARE_AES_EVP(192, ctr, CTR);
|
|
|
|
DECLARE_AES_EVP(256, ecb, ECB);
|
|
DECLARE_AES_EVP(256, cbc, CBC);
|
|
DECLARE_AES_EVP(256, cfb, CFB);
|
|
DECLARE_AES_EVP(256, ofb, OFB);
|
|
DECLARE_AES_EVP(256, ctr, CTR);
|
|
|
|
static int
|
|
padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids,
|
|
int nid)
|
|
{
|
|
/* No specific cipher => return a list of supported nids ... */
|
|
if (!cipher) {
|
|
*nids = padlock_cipher_nids;
|
|
return padlock_cipher_nids_num;
|
|
}
|
|
|
|
/* ... or the requested "cipher" otherwise */
|
|
switch (nid) {
|
|
case NID_aes_128_ecb:
|
|
*cipher = &padlock_aes_128_ecb;
|
|
break;
|
|
case NID_aes_128_cbc:
|
|
*cipher = &padlock_aes_128_cbc;
|
|
break;
|
|
case NID_aes_128_cfb:
|
|
*cipher = &padlock_aes_128_cfb;
|
|
break;
|
|
case NID_aes_128_ofb:
|
|
*cipher = &padlock_aes_128_ofb;
|
|
break;
|
|
case NID_aes_128_ctr:
|
|
*cipher = &padlock_aes_128_ctr;
|
|
break;
|
|
|
|
case NID_aes_192_ecb:
|
|
*cipher = &padlock_aes_192_ecb;
|
|
break;
|
|
case NID_aes_192_cbc:
|
|
*cipher = &padlock_aes_192_cbc;
|
|
break;
|
|
case NID_aes_192_cfb:
|
|
*cipher = &padlock_aes_192_cfb;
|
|
break;
|
|
case NID_aes_192_ofb:
|
|
*cipher = &padlock_aes_192_ofb;
|
|
break;
|
|
case NID_aes_192_ctr:
|
|
*cipher = &padlock_aes_192_ctr;
|
|
break;
|
|
|
|
case NID_aes_256_ecb:
|
|
*cipher = &padlock_aes_256_ecb;
|
|
break;
|
|
case NID_aes_256_cbc:
|
|
*cipher = &padlock_aes_256_cbc;
|
|
break;
|
|
case NID_aes_256_cfb:
|
|
*cipher = &padlock_aes_256_cfb;
|
|
break;
|
|
case NID_aes_256_ofb:
|
|
*cipher = &padlock_aes_256_ofb;
|
|
break;
|
|
case NID_aes_256_ctr:
|
|
*cipher = &padlock_aes_256_ctr;
|
|
break;
|
|
|
|
default:
|
|
/* Sorry, we don't support this NID */
|
|
*cipher = NULL;
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Prepare the encryption key for PadLock usage */
|
|
static int
|
|
padlock_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
struct padlock_cipher_data *cdata;
|
|
int key_len = EVP_CIPHER_CTX_key_length(ctx) * 8;
|
|
unsigned long mode = EVP_CIPHER_CTX_mode(ctx);
|
|
|
|
if (key == NULL)
|
|
return 0; /* ERROR */
|
|
|
|
cdata = ALIGNED_CIPHER_DATA(ctx);
|
|
memset(cdata, 0, sizeof(struct padlock_cipher_data));
|
|
|
|
/* Prepare Control word. */
|
|
if (mode == EVP_CIPH_OFB_MODE || mode == EVP_CIPH_CTR_MODE)
|
|
cdata->cword.b.encdec = 0;
|
|
else
|
|
cdata->cword.b.encdec = (ctx->encrypt == 0);
|
|
cdata->cword.b.rounds = 10 + (key_len - 128) / 32;
|
|
cdata->cword.b.ksize = (key_len - 128) / 64;
|
|
|
|
switch (key_len) {
|
|
case 128:
|
|
/*
|
|
* PadLock can generate an extended key for AES128 in hardware
|
|
*/
|
|
memcpy(cdata->ks.rd_key, key, AES_KEY_SIZE_128);
|
|
cdata->cword.b.keygen = 0;
|
|
break;
|
|
|
|
case 192:
|
|
case 256:
|
|
/*
|
|
* Generate an extended AES key in software. Needed for AES192/AES256
|
|
*/
|
|
/*
|
|
* Well, the above applies to Stepping 8 CPUs and is listed as
|
|
* hardware errata. They most likely will fix it at some point and
|
|
* then a check for stepping would be due here.
|
|
*/
|
|
if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
|
|
&& !enc)
|
|
AES_set_decrypt_key(key, key_len, &cdata->ks);
|
|
else
|
|
AES_set_encrypt_key(key, key_len, &cdata->ks);
|
|
# ifndef AES_ASM
|
|
/*
|
|
* OpenSSL C functions use byte-swapped extended key.
|
|
*/
|
|
padlock_key_bswap(&cdata->ks);
|
|
# endif
|
|
cdata->cword.b.keygen = 1;
|
|
break;
|
|
|
|
default:
|
|
/* ERROR */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This is done to cover for cases when user reuses the
|
|
* context for new key. The catch is that if we don't do
|
|
* this, padlock_eas_cipher might proceed with old key...
|
|
*/
|
|
padlock_reload_key();
|
|
|
|
return 1;
|
|
}
|
|
|
|
# endif /* OPENSSL_NO_AES */
|
|
|
|
/* ===== Random Number Generator ===== */
|
|
/*
|
|
* This code is not engaged. The reason is that it does not comply
|
|
* with recommendations for VIA RNG usage for secure applications
|
|
* (posted at http://www.via.com.tw/en/viac3/c3.jsp) nor does it
|
|
* provide meaningful error control...
|
|
*/
|
|
/*
|
|
* Wrapper that provides an interface between the API and the raw PadLock
|
|
* RNG
|
|
*/
|
|
static int padlock_rand_bytes(unsigned char *output, int count)
|
|
{
|
|
unsigned int eax, buf;
|
|
|
|
while (count >= 8) {
|
|
eax = padlock_xstore(output, 0);
|
|
if (!(eax & (1 << 6)))
|
|
return 0; /* RNG disabled */
|
|
/* this ---vv--- covers DC bias, Raw Bits and String Filter */
|
|
if (eax & (0x1F << 10))
|
|
return 0;
|
|
if ((eax & 0x1F) == 0)
|
|
continue; /* no data, retry... */
|
|
if ((eax & 0x1F) != 8)
|
|
return 0; /* fatal failure... */
|
|
output += 8;
|
|
count -= 8;
|
|
}
|
|
while (count > 0) {
|
|
eax = padlock_xstore(&buf, 3);
|
|
if (!(eax & (1 << 6)))
|
|
return 0; /* RNG disabled */
|
|
/* this ---vv--- covers DC bias, Raw Bits and String Filter */
|
|
if (eax & (0x1F << 10))
|
|
return 0;
|
|
if ((eax & 0x1F) == 0)
|
|
continue; /* no data, retry... */
|
|
if ((eax & 0x1F) != 1)
|
|
return 0; /* fatal failure... */
|
|
*output++ = (unsigned char)buf;
|
|
count--;
|
|
}
|
|
*(volatile unsigned int *)&buf = 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Dummy but necessary function */
|
|
static int padlock_rand_status(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* Prepare structure for registration */
|
|
static RAND_METHOD padlock_rand = {
|
|
NULL, /* seed */
|
|
padlock_rand_bytes, /* bytes */
|
|
NULL, /* cleanup */
|
|
NULL, /* add */
|
|
padlock_rand_bytes, /* pseudorand */
|
|
padlock_rand_status, /* rand status */
|
|
};
|
|
|
|
# else /* !COMPILE_HW_PADLOCK */
|
|
# ifndef OPENSSL_NO_DYNAMIC_ENGINE
|
|
OPENSSL_EXPORT
|
|
int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
|
|
OPENSSL_EXPORT
|
|
int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
IMPLEMENT_DYNAMIC_CHECK_FN()
|
|
# endif
|
|
# endif /* COMPILE_HW_PADLOCK */
|
|
# endif /* !OPENSSL_NO_HW_PADLOCK */
|
|
#endif /* !OPENSSL_NO_HW */
|