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shand@ubuntu.eng.hq.xensource.com
f2a4d188c4
This is a software implementation for people without h/w vTPM support. Signed-off-by: Vinnie Scarlata <vincent.r.scarlata@intel.com> Signed-off-by: Joseph Cihula <joseph.cihula@intel.com> Signed-off-by: Steven Hand <steven@xensource.com>
89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
// ===================================================================
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//
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// Copyright (c) 2005, Intel Corp.
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// 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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// * 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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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Intel Corporation nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; 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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// crypto.c
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//
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// This file will handle all the TPM Crypto functionality
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//
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// ==================================================================
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#include <string.h>
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#include <openssl/crypto.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/rand.h>
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#include "crypto.h"
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#include "log.h"
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/**
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* Initialize cryptography library
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* @rand: random seed
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* @size: size of @rand
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*/
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void Crypto_Init(const BYTE* rand, int size) {
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ERR_load_crypto_strings();
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CRYPTO_malloc_init();
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OpenSSL_add_all_algorithms();
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SYM_CIPHER = EVP_aes_128_cbc();
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RAND_poll();
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if (rand == NULL)
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return;
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RAND_add(rand, size, size);
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}
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/**
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* Shutdown cryptography library
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*/
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void Crypto_Exit() {
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ERR_free_strings();
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ERR_remove_state(0);
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EVP_cleanup();
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}
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/**
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* Get random data
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* @data: (OUT) Random data
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* @size: Size of @data
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*/
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void Crypto_GetRandom(void* data, int size) {
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int result;
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result = RAND_pseudo_bytes((BYTE*) data, size);
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if (result <= 0)
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vtpmlogerror (VTPM_LOG_CRYPTO, "RAND_pseudo_bytes failed: %s\n",
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ERR_error_string (ERR_get_error(), NULL));
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}
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