source: trunk/packages/xen-common/xen-common/tools/vtpm_manager/crypto/crypto.c @ 95

Last change on this file since 95 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

  • Property svn:mime-type set to text/cpp
File size: 2.8 KB
Line 
1// ===================================================================
2//
3// Copyright (c) 2005, Intel Corp.
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions
8// are met:
9//
10//   * Redistributions of source code must retain the above copyright
11//     notice, this list of conditions and the following disclaimer.
12//   * Redistributions in binary form must reproduce the above
13//     copyright notice, this list of conditions and the following
14//     disclaimer in the documentation and/or other materials provided
15//     with the distribution.
16//   * Neither the name of Intel Corporation nor the names of its
17//     contributors may be used to endorse or promote products derived
18//     from this software without specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
29// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
31// OF THE POSSIBILITY OF SUCH DAMAGE.
32// ===================================================================
33//
34// crypto.c
35//
36//  This file will handle all the TPM Crypto functionality
37//
38// ==================================================================
39
40#include <string.h>
41#include <openssl/crypto.h>
42#include <openssl/err.h>
43#include <openssl/evp.h>
44#include <openssl/rand.h>
45#include "crypto.h"
46#include "log.h"
47
48/**
49 * Initialize cryptography library
50 * @rand: random seed
51 * @size: size of @rand
52 */
53void Crypto_Init(const BYTE* rand, int size) {
54        ERR_load_crypto_strings();
55  CRYPTO_malloc_init();
56  OpenSSL_add_all_algorithms();
57  SYM_CIPHER = EVP_aes_128_cbc();
58  RAND_poll();
59  if (rand == NULL)
60    return;
61
62  RAND_add(rand, size, size);
63}
64
65/**
66 * Shutdown cryptography library
67 */
68void Crypto_Exit() {
69  ERR_free_strings();
70  ERR_remove_state(0);
71  EVP_cleanup();
72}
73
74
75/**
76 * Get random data
77 * @data: (OUT) Random data
78 * @size: Size of @data
79 */
80void Crypto_GetRandom(void* data, int size) {
81  int result;
82 
83  result = RAND_pseudo_bytes((BYTE*) data, size);
84 
85  if (result <= 0)
86    vtpmlogerror (VTPM_LOG_CRYPTO, "RAND_pseudo_bytes failed: %s\n",
87             ERR_error_string (ERR_get_error(), NULL));
88}
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