[331] | 1 | /*
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| 2 | * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <string.h>
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| 12 |
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| 13 | #include <openssl/opensslconf.h>
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| 14 | #include <openssl/crypto.h>
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| 15 | #include <openssl/engine.h>
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| 16 | #include <openssl/evp.h>
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| 17 | #include <openssl/aes.h>
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| 18 | #include <openssl/rand.h>
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| 19 | #include <openssl/err.h>
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| 20 | #include <openssl/modes.h>
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| 21 |
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| 22 | #ifndef OPENSSL_NO_HW
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| 23 | # ifndef OPENSSL_NO_HW_PADLOCK
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| 24 |
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| 25 | /* Attempt to have a single source for both 0.9.7 and 0.9.8 :-) */
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| 26 | # if (OPENSSL_VERSION_NUMBER >= 0x00908000L)
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| 27 | # ifndef OPENSSL_NO_DYNAMIC_ENGINE
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| 28 | # define DYNAMIC_ENGINE
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| 29 | # endif
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| 30 | # elif (OPENSSL_VERSION_NUMBER >= 0x00907000L)
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| 31 | # ifdef ENGINE_DYNAMIC_SUPPORT
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| 32 | # define DYNAMIC_ENGINE
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| 33 | # endif
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| 34 | # else
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| 35 | # error "Only OpenSSL >= 0.9.7 is supported"
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| 36 | # endif
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| 37 |
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| 38 | /*
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| 39 | * VIA PadLock AES is available *ONLY* on some x86 CPUs. Not only that it
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| 40 | * doesn't exist elsewhere, but it even can't be compiled on other platforms!
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| 41 | */
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| 42 |
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| 43 | # undef COMPILE_HW_PADLOCK
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| 44 | # if !defined(I386_ONLY) && defined(PADLOCK_ASM)
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| 45 | # define COMPILE_HW_PADLOCK
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| 46 | # ifdef OPENSSL_NO_DYNAMIC_ENGINE
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| 47 | static ENGINE *ENGINE_padlock(void);
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| 48 | # endif
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| 49 | # endif
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| 50 |
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| 51 | # ifdef OPENSSL_NO_DYNAMIC_ENGINE
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| 52 | void engine_load_padlock_int(void);
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| 53 | void engine_load_padlock_int(void)
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| 54 | {
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| 55 | /* On non-x86 CPUs it just returns. */
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| 56 | # ifdef COMPILE_HW_PADLOCK
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| 57 | ENGINE *toadd = ENGINE_padlock();
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| 58 | if (!toadd)
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| 59 | return;
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| 60 | ENGINE_add(toadd);
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| 61 | ENGINE_free(toadd);
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| 62 | ERR_clear_error();
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| 63 | # endif
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| 64 | }
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| 65 |
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| 66 | # endif
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| 67 |
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| 68 | # ifdef COMPILE_HW_PADLOCK
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| 69 |
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| 70 | /* Function for ENGINE detection and control */
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| 71 | static int padlock_available(void);
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| 72 | static int padlock_init(ENGINE *e);
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| 73 |
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| 74 | /* RNG Stuff */
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| 75 | static RAND_METHOD padlock_rand;
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| 76 |
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| 77 | /* Cipher Stuff */
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| 78 | static int padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
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| 79 | const int **nids, int nid);
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| 80 |
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| 81 | /* Engine names */
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| 82 | static const char *padlock_id = "padlock";
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| 83 | static char padlock_name[100];
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| 84 |
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| 85 | /* Available features */
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| 86 | static int padlock_use_ace = 0; /* Advanced Cryptography Engine */
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| 87 | static int padlock_use_rng = 0; /* Random Number Generator */
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| 88 |
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| 89 | /* ===== Engine "management" functions ===== */
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| 90 |
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| 91 | /* Prepare the ENGINE structure for registration */
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| 92 | static int padlock_bind_helper(ENGINE *e)
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| 93 | {
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| 94 | /* Check available features */
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| 95 | padlock_available();
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| 96 |
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| 97 | /*
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| 98 | * RNG is currently disabled for reasons discussed in commentary just
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| 99 | * before padlock_rand_bytes function.
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| 100 | */
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| 101 | padlock_use_rng = 0;
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| 102 |
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| 103 | /* Generate a nice engine name with available features */
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| 104 | BIO_snprintf(padlock_name, sizeof(padlock_name),
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| 105 | "VIA PadLock (%s, %s)",
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| 106 | padlock_use_rng ? "RNG" : "no-RNG",
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| 107 | padlock_use_ace ? "ACE" : "no-ACE");
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| 108 |
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| 109 | /* Register everything or return with an error */
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| 110 | if (!ENGINE_set_id(e, padlock_id) ||
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| 111 | !ENGINE_set_name(e, padlock_name) ||
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| 112 | !ENGINE_set_init_function(e, padlock_init) ||
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| 113 | (padlock_use_ace && !ENGINE_set_ciphers(e, padlock_ciphers)) ||
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| 114 | (padlock_use_rng && !ENGINE_set_RAND(e, &padlock_rand))) {
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| 115 | return 0;
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| 116 | }
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| 117 |
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| 118 | /* Everything looks good */
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| 119 | return 1;
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| 120 | }
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| 121 |
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| 122 | # ifdef OPENSSL_NO_DYNAMIC_ENGINE
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| 123 | /* Constructor */
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| 124 | static ENGINE *ENGINE_padlock(void)
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| 125 | {
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| 126 | ENGINE *eng = ENGINE_new();
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| 127 |
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| 128 | if (eng == NULL) {
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| 129 | return NULL;
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| 130 | }
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| 131 |
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| 132 | if (!padlock_bind_helper(eng)) {
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| 133 | ENGINE_free(eng);
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| 134 | return NULL;
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| 135 | }
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| 136 |
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| 137 | return eng;
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| 138 | }
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| 139 | # endif
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| 140 |
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| 141 | /* Check availability of the engine */
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| 142 | static int padlock_init(ENGINE *e)
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| 143 | {
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| 144 | return (padlock_use_rng || padlock_use_ace);
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| 145 | }
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| 146 |
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| 147 | /*
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| 148 | * This stuff is needed if this ENGINE is being compiled into a
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| 149 | * self-contained shared-library.
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| 150 | */
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| 151 | # ifdef DYNAMIC_ENGINE
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| 152 | static int padlock_bind_fn(ENGINE *e, const char *id)
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| 153 | {
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| 154 | if (id && (strcmp(id, padlock_id) != 0)) {
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| 155 | return 0;
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| 156 | }
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| 157 |
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| 158 | if (!padlock_bind_helper(e)) {
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| 159 | return 0;
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| 160 | }
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| 161 |
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| 162 | return 1;
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| 163 | }
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| 164 |
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| 165 | IMPLEMENT_DYNAMIC_CHECK_FN()
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| 166 | IMPLEMENT_DYNAMIC_BIND_FN(padlock_bind_fn)
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| 167 | # endif /* DYNAMIC_ENGINE */
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| 168 | /* ===== Here comes the "real" engine ===== */
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| 169 |
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| 170 | /* Some AES-related constants */
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| 171 | # define AES_BLOCK_SIZE 16
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| 172 | # define AES_KEY_SIZE_128 16
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| 173 | # define AES_KEY_SIZE_192 24
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| 174 | # define AES_KEY_SIZE_256 32
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| 175 | /*
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| 176 | * Here we store the status information relevant to the current context.
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| 177 | */
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| 178 | /*
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| 179 | * BIG FAT WARNING: Inline assembler in PADLOCK_XCRYPT_ASM() depends on
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| 180 | * the order of items in this structure. Don't blindly modify, reorder,
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| 181 | * etc!
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| 182 | */
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| 183 | struct padlock_cipher_data {
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| 184 | unsigned char iv[AES_BLOCK_SIZE]; /* Initialization vector */
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| 185 | union {
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| 186 | unsigned int pad[4];
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| 187 | struct {
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| 188 | int rounds:4;
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| 189 | int dgst:1; /* n/a in C3 */
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| 190 | int align:1; /* n/a in C3 */
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| 191 | int ciphr:1; /* n/a in C3 */
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| 192 | unsigned int keygen:1;
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| 193 | int interm:1;
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| 194 | unsigned int encdec:1;
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| 195 | int ksize:2;
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| 196 | } b;
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| 197 | } cword; /* Control word */
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| 198 | AES_KEY ks; /* Encryption key */
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| 199 | };
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| 200 |
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| 201 | /* Interface to assembler module */
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| 202 | unsigned int padlock_capability();
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| 203 | void padlock_key_bswap(AES_KEY *key);
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| 204 | void padlock_verify_context(struct padlock_cipher_data *ctx);
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| 205 | void padlock_reload_key();
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| 206 | void padlock_aes_block(void *out, const void *inp,
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| 207 | struct padlock_cipher_data *ctx);
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| 208 | int padlock_ecb_encrypt(void *out, const void *inp,
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| 209 | struct padlock_cipher_data *ctx, size_t len);
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| 210 | int padlock_cbc_encrypt(void *out, const void *inp,
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| 211 | struct padlock_cipher_data *ctx, size_t len);
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| 212 | int padlock_cfb_encrypt(void *out, const void *inp,
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| 213 | struct padlock_cipher_data *ctx, size_t len);
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| 214 | int padlock_ofb_encrypt(void *out, const void *inp,
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| 215 | struct padlock_cipher_data *ctx, size_t len);
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| 216 | int padlock_ctr32_encrypt(void *out, const void *inp,
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| 217 | struct padlock_cipher_data *ctx, size_t len);
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| 218 | int padlock_xstore(void *out, int edx);
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| 219 | void padlock_sha1_oneshot(void *ctx, const void *inp, size_t len);
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| 220 | void padlock_sha1(void *ctx, const void *inp, size_t len);
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| 221 | void padlock_sha256_oneshot(void *ctx, const void *inp, size_t len);
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| 222 | void padlock_sha256(void *ctx, const void *inp, size_t len);
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| 223 |
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| 224 | /*
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| 225 | * Load supported features of the CPU to see if the PadLock is available.
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| 226 | */
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| 227 | static int padlock_available(void)
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| 228 | {
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| 229 | unsigned int edx = padlock_capability();
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| 230 |
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| 231 | /* Fill up some flags */
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| 232 | padlock_use_ace = ((edx & (0x3 << 6)) == (0x3 << 6));
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| 233 | padlock_use_rng = ((edx & (0x3 << 2)) == (0x3 << 2));
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| 234 |
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| 235 | return padlock_use_ace + padlock_use_rng;
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| 236 | }
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| 237 |
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| 238 | /* ===== AES encryption/decryption ===== */
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| 239 |
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| 240 | # if defined(NID_aes_128_cfb128) && ! defined (NID_aes_128_cfb)
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| 241 | # define NID_aes_128_cfb NID_aes_128_cfb128
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| 242 | # endif
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| 243 |
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| 244 | # if defined(NID_aes_128_ofb128) && ! defined (NID_aes_128_ofb)
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| 245 | # define NID_aes_128_ofb NID_aes_128_ofb128
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| 246 | # endif
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| 247 |
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| 248 | # if defined(NID_aes_192_cfb128) && ! defined (NID_aes_192_cfb)
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| 249 | # define NID_aes_192_cfb NID_aes_192_cfb128
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| 250 | # endif
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| 251 |
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| 252 | # if defined(NID_aes_192_ofb128) && ! defined (NID_aes_192_ofb)
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| 253 | # define NID_aes_192_ofb NID_aes_192_ofb128
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| 254 | # endif
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| 255 |
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| 256 | # if defined(NID_aes_256_cfb128) && ! defined (NID_aes_256_cfb)
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| 257 | # define NID_aes_256_cfb NID_aes_256_cfb128
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| 258 | # endif
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| 259 |
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| 260 | # if defined(NID_aes_256_ofb128) && ! defined (NID_aes_256_ofb)
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| 261 | # define NID_aes_256_ofb NID_aes_256_ofb128
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| 262 | # endif
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| 263 |
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| 264 | /* List of supported ciphers. */
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| 265 | static const int padlock_cipher_nids[] = {
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| 266 | NID_aes_128_ecb,
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| 267 | NID_aes_128_cbc,
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| 268 | NID_aes_128_cfb,
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| 269 | NID_aes_128_ofb,
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| 270 | NID_aes_128_ctr,
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| 271 |
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| 272 | NID_aes_192_ecb,
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| 273 | NID_aes_192_cbc,
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| 274 | NID_aes_192_cfb,
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| 275 | NID_aes_192_ofb,
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| 276 | NID_aes_192_ctr,
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| 277 |
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| 278 | NID_aes_256_ecb,
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| 279 | NID_aes_256_cbc,
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| 280 | NID_aes_256_cfb,
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| 281 | NID_aes_256_ofb,
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| 282 | NID_aes_256_ctr
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| 283 | };
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| 284 |
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| 285 | static int padlock_cipher_nids_num = (sizeof(padlock_cipher_nids) /
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| 286 | sizeof(padlock_cipher_nids[0]));
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| 287 |
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| 288 | /* Function prototypes ... */
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| 289 | static int padlock_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 290 | const unsigned char *iv, int enc);
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| 291 |
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| 292 | # define NEAREST_ALIGNED(ptr) ( (unsigned char *)(ptr) + \
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| 293 | ( (0x10 - ((size_t)(ptr) & 0x0F)) & 0x0F ) )
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| 294 | # define ALIGNED_CIPHER_DATA(ctx) ((struct padlock_cipher_data *)\
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| 295 | NEAREST_ALIGNED(EVP_CIPHER_CTX_get_cipher_data(ctx)))
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| 296 |
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| 297 | static int
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| 298 | padlock_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
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| 299 | const unsigned char *in_arg, size_t nbytes)
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| 300 | {
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| 301 | return padlock_ecb_encrypt(out_arg, in_arg,
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| 302 | ALIGNED_CIPHER_DATA(ctx), nbytes);
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| 303 | }
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| 304 |
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| 305 | static int
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| 306 | padlock_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
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| 307 | const unsigned char *in_arg, size_t nbytes)
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| 308 | {
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| 309 | struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
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| 310 | int ret;
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| 311 |
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| 312 | memcpy(cdata->iv, EVP_CIPHER_CTX_iv(ctx), AES_BLOCK_SIZE);
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| 313 | if ((ret = padlock_cbc_encrypt(out_arg, in_arg, cdata, nbytes)))
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| 314 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), cdata->iv, AES_BLOCK_SIZE);
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| 315 | return ret;
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| 316 | }
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| 317 |
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| 318 | static int
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| 319 | padlock_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
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| 320 | const unsigned char *in_arg, size_t nbytes)
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| 321 | {
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| 322 | struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
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| 323 | size_t chunk;
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| 324 |
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| 325 | if ((chunk = EVP_CIPHER_CTX_num(ctx))) { /* borrow chunk variable */
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| 326 | unsigned char *ivp = EVP_CIPHER_CTX_iv_noconst(ctx);
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| 327 |
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| 328 | if (chunk >= AES_BLOCK_SIZE)
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| 329 | return 0; /* bogus value */
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| 330 |
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| 331 | if (EVP_CIPHER_CTX_encrypting(ctx))
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| 332 | while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
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| 333 | ivp[chunk] = *(out_arg++) = *(in_arg++) ^ ivp[chunk];
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| 334 | chunk++, nbytes--;
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| 335 | } else
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| 336 | while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
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| 337 | unsigned char c = *(in_arg++);
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| 338 | *(out_arg++) = c ^ ivp[chunk];
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| 339 | ivp[chunk++] = c, nbytes--;
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| 340 | }
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| 341 |
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| 342 | EVP_CIPHER_CTX_set_num(ctx, chunk % AES_BLOCK_SIZE);
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| 343 | }
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| 344 |
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| 345 | if (nbytes == 0)
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| 346 | return 1;
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| 347 |
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| 348 | memcpy(cdata->iv, EVP_CIPHER_CTX_iv(ctx), AES_BLOCK_SIZE);
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| 349 |
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| 350 | if ((chunk = nbytes & ~(AES_BLOCK_SIZE - 1))) {
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| 351 | if (!padlock_cfb_encrypt(out_arg, in_arg, cdata, chunk))
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| 352 | return 0;
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| 353 | nbytes -= chunk;
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| 354 | }
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| 355 |
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| 356 | if (nbytes) {
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| 357 | unsigned char *ivp = cdata->iv;
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| 358 |
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| 359 | out_arg += chunk;
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| 360 | in_arg += chunk;
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| 361 | EVP_CIPHER_CTX_set_num(ctx, nbytes);
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| 362 | if (cdata->cword.b.encdec) {
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| 363 | cdata->cword.b.encdec = 0;
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| 364 | padlock_reload_key();
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| 365 | padlock_aes_block(ivp, ivp, cdata);
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| 366 | cdata->cword.b.encdec = 1;
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| 367 | padlock_reload_key();
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| 368 | while (nbytes) {
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| 369 | unsigned char c = *(in_arg++);
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| 370 | *(out_arg++) = c ^ *ivp;
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| 371 | *(ivp++) = c, nbytes--;
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| 372 | }
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| 373 | } else {
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| 374 | padlock_reload_key();
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| 375 | padlock_aes_block(ivp, ivp, cdata);
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| 376 | padlock_reload_key();
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| 377 | while (nbytes) {
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| 378 | *ivp = *(out_arg++) = *(in_arg++) ^ *ivp;
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| 379 | ivp++, nbytes--;
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| 380 | }
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| 381 | }
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| 382 | }
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| 383 |
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| 384 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), cdata->iv, AES_BLOCK_SIZE);
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| 385 |
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| 386 | return 1;
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| 387 | }
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| 388 |
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| 389 | static int
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| 390 | padlock_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
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| 391 | const unsigned char *in_arg, size_t nbytes)
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| 392 | {
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| 393 | struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
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| 394 | size_t chunk;
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| 395 |
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| 396 | /*
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| 397 | * ctx->num is maintained in byte-oriented modes, such as CFB and OFB...
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| 398 | */
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| 399 | if ((chunk = EVP_CIPHER_CTX_num(ctx))) { /* borrow chunk variable */
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| 400 | unsigned char *ivp = EVP_CIPHER_CTX_iv_noconst(ctx);
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| 401 |
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| 402 | if (chunk >= AES_BLOCK_SIZE)
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| 403 | return 0; /* bogus value */
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| 404 |
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| 405 | while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
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| 406 | *(out_arg++) = *(in_arg++) ^ ivp[chunk];
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| 407 | chunk++, nbytes--;
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| 408 | }
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| 409 |
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| 410 | EVP_CIPHER_CTX_set_num(ctx, chunk % AES_BLOCK_SIZE);
|
---|
| 411 | }
|
---|
| 412 |
|
---|
| 413 | if (nbytes == 0)
|
---|
| 414 | return 1;
|
---|
| 415 |
|
---|
| 416 | memcpy(cdata->iv, EVP_CIPHER_CTX_iv(ctx), AES_BLOCK_SIZE);
|
---|
| 417 |
|
---|
| 418 | if ((chunk = nbytes & ~(AES_BLOCK_SIZE - 1))) {
|
---|
| 419 | if (!padlock_ofb_encrypt(out_arg, in_arg, cdata, chunk))
|
---|
| 420 | return 0;
|
---|
| 421 | nbytes -= chunk;
|
---|
| 422 | }
|
---|
| 423 |
|
---|
| 424 | if (nbytes) {
|
---|
| 425 | unsigned char *ivp = cdata->iv;
|
---|
| 426 |
|
---|
| 427 | out_arg += chunk;
|
---|
| 428 | in_arg += chunk;
|
---|
| 429 | EVP_CIPHER_CTX_set_num(ctx, nbytes);
|
---|
| 430 | padlock_reload_key(); /* empirically found */
|
---|
| 431 | padlock_aes_block(ivp, ivp, cdata);
|
---|
| 432 | padlock_reload_key(); /* empirically found */
|
---|
| 433 | while (nbytes) {
|
---|
| 434 | *(out_arg++) = *(in_arg++) ^ *ivp;
|
---|
| 435 | ivp++, nbytes--;
|
---|
| 436 | }
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), cdata->iv, AES_BLOCK_SIZE);
|
---|
| 440 |
|
---|
| 441 | return 1;
|
---|
| 442 | }
|
---|
| 443 |
|
---|
| 444 | static void padlock_ctr32_encrypt_glue(const unsigned char *in,
|
---|
| 445 | unsigned char *out, size_t blocks,
|
---|
| 446 | struct padlock_cipher_data *ctx,
|
---|
| 447 | const unsigned char *ivec)
|
---|
| 448 | {
|
---|
| 449 | memcpy(ctx->iv, ivec, AES_BLOCK_SIZE);
|
---|
| 450 | padlock_ctr32_encrypt(out, in, ctx, AES_BLOCK_SIZE * blocks);
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 | static int
|
---|
| 454 | padlock_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
|
---|
| 455 | const unsigned char *in_arg, size_t nbytes)
|
---|
| 456 | {
|
---|
| 457 | struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
|
---|
| 458 | unsigned int num = EVP_CIPHER_CTX_num(ctx);
|
---|
| 459 |
|
---|
| 460 | CRYPTO_ctr128_encrypt_ctr32(in_arg, out_arg, nbytes,
|
---|
| 461 | cdata, EVP_CIPHER_CTX_iv_noconst(ctx),
|
---|
| 462 | EVP_CIPHER_CTX_buf_noconst(ctx), &num,
|
---|
| 463 | (ctr128_f) padlock_ctr32_encrypt_glue);
|
---|
| 464 |
|
---|
| 465 | EVP_CIPHER_CTX_set_num(ctx, (size_t)num);
|
---|
| 466 | return 1;
|
---|
| 467 | }
|
---|
| 468 |
|
---|
| 469 | # define EVP_CIPHER_block_size_ECB AES_BLOCK_SIZE
|
---|
| 470 | # define EVP_CIPHER_block_size_CBC AES_BLOCK_SIZE
|
---|
| 471 | # define EVP_CIPHER_block_size_OFB 1
|
---|
| 472 | # define EVP_CIPHER_block_size_CFB 1
|
---|
| 473 | # define EVP_CIPHER_block_size_CTR 1
|
---|
| 474 |
|
---|
| 475 | /*
|
---|
| 476 | * Declaring so many ciphers by hand would be a pain. Instead introduce a bit
|
---|
| 477 | * of preprocessor magic :-)
|
---|
| 478 | */
|
---|
| 479 | # define DECLARE_AES_EVP(ksize,lmode,umode) \
|
---|
| 480 | static EVP_CIPHER *_hidden_aes_##ksize##_##lmode = NULL; \
|
---|
| 481 | static const EVP_CIPHER *padlock_aes_##ksize##_##lmode(void) \
|
---|
| 482 | { \
|
---|
| 483 | if (_hidden_aes_##ksize##_##lmode == NULL \
|
---|
| 484 | && ((_hidden_aes_##ksize##_##lmode = \
|
---|
| 485 | EVP_CIPHER_meth_new(NID_aes_##ksize##_##lmode, \
|
---|
| 486 | EVP_CIPHER_block_size_##umode, \
|
---|
| 487 | AES_KEY_SIZE_##ksize)) == NULL \
|
---|
| 488 | || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_##ksize##_##lmode, \
|
---|
| 489 | AES_BLOCK_SIZE) \
|
---|
| 490 | || !EVP_CIPHER_meth_set_flags(_hidden_aes_##ksize##_##lmode, \
|
---|
| 491 | 0 | EVP_CIPH_##umode##_MODE) \
|
---|
| 492 | || !EVP_CIPHER_meth_set_init(_hidden_aes_##ksize##_##lmode, \
|
---|
| 493 | padlock_aes_init_key) \
|
---|
| 494 | || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_##ksize##_##lmode, \
|
---|
| 495 | padlock_##lmode##_cipher) \
|
---|
| 496 | || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_##ksize##_##lmode, \
|
---|
| 497 | sizeof(struct padlock_cipher_data) + 16) \
|
---|
| 498 | || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_aes_##ksize##_##lmode, \
|
---|
| 499 | EVP_CIPHER_set_asn1_iv) \
|
---|
| 500 | || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_aes_##ksize##_##lmode, \
|
---|
| 501 | EVP_CIPHER_get_asn1_iv))) { \
|
---|
| 502 | EVP_CIPHER_meth_free(_hidden_aes_##ksize##_##lmode); \
|
---|
| 503 | _hidden_aes_##ksize##_##lmode = NULL; \
|
---|
| 504 | } \
|
---|
| 505 | return _hidden_aes_##ksize##_##lmode; \
|
---|
| 506 | }
|
---|
| 507 |
|
---|
| 508 | DECLARE_AES_EVP(128, ecb, ECB)
|
---|
| 509 | DECLARE_AES_EVP(128, cbc, CBC)
|
---|
| 510 | DECLARE_AES_EVP(128, cfb, CFB)
|
---|
| 511 | DECLARE_AES_EVP(128, ofb, OFB)
|
---|
| 512 | DECLARE_AES_EVP(128, ctr, CTR)
|
---|
| 513 |
|
---|
| 514 | DECLARE_AES_EVP(192, ecb, ECB)
|
---|
| 515 | DECLARE_AES_EVP(192, cbc, CBC)
|
---|
| 516 | DECLARE_AES_EVP(192, cfb, CFB)
|
---|
| 517 | DECLARE_AES_EVP(192, ofb, OFB)
|
---|
| 518 | DECLARE_AES_EVP(192, ctr, CTR)
|
---|
| 519 |
|
---|
| 520 | DECLARE_AES_EVP(256, ecb, ECB)
|
---|
| 521 | DECLARE_AES_EVP(256, cbc, CBC)
|
---|
| 522 | DECLARE_AES_EVP(256, cfb, CFB)
|
---|
| 523 | DECLARE_AES_EVP(256, ofb, OFB)
|
---|
| 524 | DECLARE_AES_EVP(256, ctr, CTR)
|
---|
| 525 |
|
---|
| 526 | static int
|
---|
| 527 | padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids,
|
---|
| 528 | int nid)
|
---|
| 529 | {
|
---|
| 530 | /* No specific cipher => return a list of supported nids ... */
|
---|
| 531 | if (!cipher) {
|
---|
| 532 | *nids = padlock_cipher_nids;
|
---|
| 533 | return padlock_cipher_nids_num;
|
---|
| 534 | }
|
---|
| 535 |
|
---|
| 536 | /* ... or the requested "cipher" otherwise */
|
---|
| 537 | switch (nid) {
|
---|
| 538 | case NID_aes_128_ecb:
|
---|
| 539 | *cipher = padlock_aes_128_ecb();
|
---|
| 540 | break;
|
---|
| 541 | case NID_aes_128_cbc:
|
---|
| 542 | *cipher = padlock_aes_128_cbc();
|
---|
| 543 | break;
|
---|
| 544 | case NID_aes_128_cfb:
|
---|
| 545 | *cipher = padlock_aes_128_cfb();
|
---|
| 546 | break;
|
---|
| 547 | case NID_aes_128_ofb:
|
---|
| 548 | *cipher = padlock_aes_128_ofb();
|
---|
| 549 | break;
|
---|
| 550 | case NID_aes_128_ctr:
|
---|
| 551 | *cipher = padlock_aes_128_ctr();
|
---|
| 552 | break;
|
---|
| 553 |
|
---|
| 554 | case NID_aes_192_ecb:
|
---|
| 555 | *cipher = padlock_aes_192_ecb();
|
---|
| 556 | break;
|
---|
| 557 | case NID_aes_192_cbc:
|
---|
| 558 | *cipher = padlock_aes_192_cbc();
|
---|
| 559 | break;
|
---|
| 560 | case NID_aes_192_cfb:
|
---|
| 561 | *cipher = padlock_aes_192_cfb();
|
---|
| 562 | break;
|
---|
| 563 | case NID_aes_192_ofb:
|
---|
| 564 | *cipher = padlock_aes_192_ofb();
|
---|
| 565 | break;
|
---|
| 566 | case NID_aes_192_ctr:
|
---|
| 567 | *cipher = padlock_aes_192_ctr();
|
---|
| 568 | break;
|
---|
| 569 |
|
---|
| 570 | case NID_aes_256_ecb:
|
---|
| 571 | *cipher = padlock_aes_256_ecb();
|
---|
| 572 | break;
|
---|
| 573 | case NID_aes_256_cbc:
|
---|
| 574 | *cipher = padlock_aes_256_cbc();
|
---|
| 575 | break;
|
---|
| 576 | case NID_aes_256_cfb:
|
---|
| 577 | *cipher = padlock_aes_256_cfb();
|
---|
| 578 | break;
|
---|
| 579 | case NID_aes_256_ofb:
|
---|
| 580 | *cipher = padlock_aes_256_ofb();
|
---|
| 581 | break;
|
---|
| 582 | case NID_aes_256_ctr:
|
---|
| 583 | *cipher = padlock_aes_256_ctr();
|
---|
| 584 | break;
|
---|
| 585 |
|
---|
| 586 | default:
|
---|
| 587 | /* Sorry, we don't support this NID */
|
---|
| 588 | *cipher = NULL;
|
---|
| 589 | return 0;
|
---|
| 590 | }
|
---|
| 591 |
|
---|
| 592 | return 1;
|
---|
| 593 | }
|
---|
| 594 |
|
---|
| 595 | /* Prepare the encryption key for PadLock usage */
|
---|
| 596 | static int
|
---|
| 597 | padlock_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
---|
| 598 | const unsigned char *iv, int enc)
|
---|
| 599 | {
|
---|
| 600 | struct padlock_cipher_data *cdata;
|
---|
| 601 | int key_len = EVP_CIPHER_CTX_key_length(ctx) * 8;
|
---|
| 602 | unsigned long mode = EVP_CIPHER_CTX_mode(ctx);
|
---|
| 603 |
|
---|
| 604 | if (key == NULL)
|
---|
| 605 | return 0; /* ERROR */
|
---|
| 606 |
|
---|
| 607 | cdata = ALIGNED_CIPHER_DATA(ctx);
|
---|
| 608 | memset(cdata, 0, sizeof(*cdata));
|
---|
| 609 |
|
---|
| 610 | /* Prepare Control word. */
|
---|
| 611 | if (mode == EVP_CIPH_OFB_MODE || mode == EVP_CIPH_CTR_MODE)
|
---|
| 612 | cdata->cword.b.encdec = 0;
|
---|
| 613 | else
|
---|
| 614 | cdata->cword.b.encdec = (EVP_CIPHER_CTX_encrypting(ctx) == 0);
|
---|
| 615 | cdata->cword.b.rounds = 10 + (key_len - 128) / 32;
|
---|
| 616 | cdata->cword.b.ksize = (key_len - 128) / 64;
|
---|
| 617 |
|
---|
| 618 | switch (key_len) {
|
---|
| 619 | case 128:
|
---|
| 620 | /*
|
---|
| 621 | * PadLock can generate an extended key for AES128 in hardware
|
---|
| 622 | */
|
---|
| 623 | memcpy(cdata->ks.rd_key, key, AES_KEY_SIZE_128);
|
---|
| 624 | cdata->cword.b.keygen = 0;
|
---|
| 625 | break;
|
---|
| 626 |
|
---|
| 627 | case 192:
|
---|
| 628 | case 256:
|
---|
| 629 | /*
|
---|
| 630 | * Generate an extended AES key in software. Needed for AES192/AES256
|
---|
| 631 | */
|
---|
| 632 | /*
|
---|
| 633 | * Well, the above applies to Stepping 8 CPUs and is listed as
|
---|
| 634 | * hardware errata. They most likely will fix it at some point and
|
---|
| 635 | * then a check for stepping would be due here.
|
---|
| 636 | */
|
---|
| 637 | if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
|
---|
| 638 | && !enc)
|
---|
| 639 | AES_set_decrypt_key(key, key_len, &cdata->ks);
|
---|
| 640 | else
|
---|
| 641 | AES_set_encrypt_key(key, key_len, &cdata->ks);
|
---|
| 642 | # ifndef AES_ASM
|
---|
| 643 | /*
|
---|
| 644 | * OpenSSL C functions use byte-swapped extended key.
|
---|
| 645 | */
|
---|
| 646 | padlock_key_bswap(&cdata->ks);
|
---|
| 647 | # endif
|
---|
| 648 | cdata->cword.b.keygen = 1;
|
---|
| 649 | break;
|
---|
| 650 |
|
---|
| 651 | default:
|
---|
| 652 | /* ERROR */
|
---|
| 653 | return 0;
|
---|
| 654 | }
|
---|
| 655 |
|
---|
| 656 | /*
|
---|
| 657 | * This is done to cover for cases when user reuses the
|
---|
| 658 | * context for new key. The catch is that if we don't do
|
---|
| 659 | * this, padlock_eas_cipher might proceed with old key...
|
---|
| 660 | */
|
---|
| 661 | padlock_reload_key();
|
---|
| 662 |
|
---|
| 663 | return 1;
|
---|
| 664 | }
|
---|
| 665 |
|
---|
| 666 | /* ===== Random Number Generator ===== */
|
---|
| 667 | /*
|
---|
| 668 | * This code is not engaged. The reason is that it does not comply
|
---|
| 669 | * with recommendations for VIA RNG usage for secure applications
|
---|
| 670 | * (posted at http://www.via.com.tw/en/viac3/c3.jsp) nor does it
|
---|
| 671 | * provide meaningful error control...
|
---|
| 672 | */
|
---|
| 673 | /*
|
---|
| 674 | * Wrapper that provides an interface between the API and the raw PadLock
|
---|
| 675 | * RNG
|
---|
| 676 | */
|
---|
| 677 | static int padlock_rand_bytes(unsigned char *output, int count)
|
---|
| 678 | {
|
---|
| 679 | unsigned int eax, buf;
|
---|
| 680 |
|
---|
| 681 | while (count >= 8) {
|
---|
| 682 | eax = padlock_xstore(output, 0);
|
---|
| 683 | if (!(eax & (1 << 6)))
|
---|
| 684 | return 0; /* RNG disabled */
|
---|
| 685 | /* this ---vv--- covers DC bias, Raw Bits and String Filter */
|
---|
| 686 | if (eax & (0x1F << 10))
|
---|
| 687 | return 0;
|
---|
| 688 | if ((eax & 0x1F) == 0)
|
---|
| 689 | continue; /* no data, retry... */
|
---|
| 690 | if ((eax & 0x1F) != 8)
|
---|
| 691 | return 0; /* fatal failure... */
|
---|
| 692 | output += 8;
|
---|
| 693 | count -= 8;
|
---|
| 694 | }
|
---|
| 695 | while (count > 0) {
|
---|
| 696 | eax = padlock_xstore(&buf, 3);
|
---|
| 697 | if (!(eax & (1 << 6)))
|
---|
| 698 | return 0; /* RNG disabled */
|
---|
| 699 | /* this ---vv--- covers DC bias, Raw Bits and String Filter */
|
---|
| 700 | if (eax & (0x1F << 10))
|
---|
| 701 | return 0;
|
---|
| 702 | if ((eax & 0x1F) == 0)
|
---|
| 703 | continue; /* no data, retry... */
|
---|
| 704 | if ((eax & 0x1F) != 1)
|
---|
| 705 | return 0; /* fatal failure... */
|
---|
| 706 | *output++ = (unsigned char)buf;
|
---|
| 707 | count--;
|
---|
| 708 | }
|
---|
| 709 | OPENSSL_cleanse(&buf, sizeof(buf));
|
---|
| 710 |
|
---|
| 711 | return 1;
|
---|
| 712 | }
|
---|
| 713 |
|
---|
| 714 | /* Dummy but necessary function */
|
---|
| 715 | static int padlock_rand_status(void)
|
---|
| 716 | {
|
---|
| 717 | return 1;
|
---|
| 718 | }
|
---|
| 719 |
|
---|
| 720 | /* Prepare structure for registration */
|
---|
| 721 | static RAND_METHOD padlock_rand = {
|
---|
| 722 | NULL, /* seed */
|
---|
| 723 | padlock_rand_bytes, /* bytes */
|
---|
| 724 | NULL, /* cleanup */
|
---|
| 725 | NULL, /* add */
|
---|
| 726 | padlock_rand_bytes, /* pseudorand */
|
---|
| 727 | padlock_rand_status, /* rand status */
|
---|
| 728 | };
|
---|
| 729 |
|
---|
| 730 | # endif /* COMPILE_HW_PADLOCK */
|
---|
| 731 | # endif /* !OPENSSL_NO_HW_PADLOCK */
|
---|
| 732 | #endif /* !OPENSSL_NO_HW */
|
---|
| 733 |
|
---|
| 734 | #if defined(OPENSSL_NO_HW) || defined(OPENSSL_NO_HW_PADLOCK) \
|
---|
| 735 | || !defined(COMPILE_HW_PADLOCK)
|
---|
| 736 | # ifndef OPENSSL_NO_DYNAMIC_ENGINE
|
---|
| 737 | OPENSSL_EXPORT
|
---|
| 738 | int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
|
---|
| 739 | OPENSSL_EXPORT
|
---|
| 740 | int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns)
|
---|
| 741 | {
|
---|
| 742 | return 0;
|
---|
| 743 | }
|
---|
| 744 |
|
---|
| 745 | IMPLEMENT_DYNAMIC_CHECK_FN()
|
---|
| 746 | # endif
|
---|
| 747 | #endif
|
---|