| 1 | /*
|
|---|
| 2 | * Copyright 2011-2020 The OpenSSL Project Authors. All Rights Reserved.
|
|---|
| 3 | *
|
|---|
| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
|
|---|
| 5 | * this file except in compliance with the License. You can obtain a copy
|
|---|
| 6 | * in the file LICENSE in the source distribution or at
|
|---|
| 7 | * https://www.openssl.org/source/license.html
|
|---|
| 8 | */
|
|---|
| 9 |
|
|---|
| 10 | /* We need to use some engine deprecated APIs */
|
|---|
| 11 | #define OPENSSL_SUPPRESS_DEPRECATED
|
|---|
| 12 |
|
|---|
| 13 | #include <openssl/opensslconf.h>
|
|---|
| 14 |
|
|---|
| 15 | #include <stdio.h>
|
|---|
| 16 | #include <string.h>
|
|---|
| 17 | #include "crypto/engine.h"
|
|---|
| 18 | #include "internal/cryptlib.h"
|
|---|
| 19 | #include <openssl/rand.h>
|
|---|
| 20 | #include <openssl/err.h>
|
|---|
| 21 | #include <openssl/crypto.h>
|
|---|
| 22 |
|
|---|
| 23 | #if (defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
|
|---|
| 24 | defined(__x86_64) || defined(__x86_64__) || \
|
|---|
| 25 | defined(_M_AMD64) || defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ)
|
|---|
| 26 |
|
|---|
| 27 | size_t OPENSSL_ia32_rdrand_bytes(unsigned char *buf, size_t len);
|
|---|
| 28 |
|
|---|
| 29 | static int get_random_bytes(unsigned char *buf, int num)
|
|---|
| 30 | {
|
|---|
| 31 | if (num < 0) {
|
|---|
| 32 | return 0;
|
|---|
| 33 | }
|
|---|
| 34 |
|
|---|
| 35 | return (size_t)num == OPENSSL_ia32_rdrand_bytes(buf, (size_t)num);
|
|---|
| 36 | }
|
|---|
| 37 |
|
|---|
| 38 | static int random_status(void)
|
|---|
| 39 | {
|
|---|
| 40 | return 1;
|
|---|
| 41 | }
|
|---|
| 42 |
|
|---|
| 43 | static RAND_METHOD rdrand_meth = {
|
|---|
| 44 | NULL, /* seed */
|
|---|
| 45 | get_random_bytes,
|
|---|
| 46 | NULL, /* cleanup */
|
|---|
| 47 | NULL, /* add */
|
|---|
| 48 | get_random_bytes,
|
|---|
| 49 | random_status,
|
|---|
| 50 | };
|
|---|
| 51 |
|
|---|
| 52 | static int rdrand_init(ENGINE *e)
|
|---|
| 53 | {
|
|---|
| 54 | return 1;
|
|---|
| 55 | }
|
|---|
| 56 |
|
|---|
| 57 | static const char *engine_e_rdrand_id = "rdrand";
|
|---|
| 58 | static const char *engine_e_rdrand_name = "Intel RDRAND engine";
|
|---|
| 59 |
|
|---|
| 60 | static int bind_helper(ENGINE *e)
|
|---|
| 61 | {
|
|---|
| 62 | if (!ENGINE_set_id(e, engine_e_rdrand_id) ||
|
|---|
| 63 | !ENGINE_set_name(e, engine_e_rdrand_name) ||
|
|---|
| 64 | !ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL) ||
|
|---|
| 65 | !ENGINE_set_init_function(e, rdrand_init) ||
|
|---|
| 66 | !ENGINE_set_RAND(e, &rdrand_meth))
|
|---|
| 67 | return 0;
|
|---|
| 68 |
|
|---|
| 69 | return 1;
|
|---|
| 70 | }
|
|---|
| 71 |
|
|---|
| 72 | static ENGINE *ENGINE_rdrand(void)
|
|---|
| 73 | {
|
|---|
| 74 | ENGINE *ret = ENGINE_new();
|
|---|
| 75 | if (ret == NULL)
|
|---|
| 76 | return NULL;
|
|---|
| 77 | if (!bind_helper(ret)) {
|
|---|
| 78 | ENGINE_free(ret);
|
|---|
| 79 | return NULL;
|
|---|
| 80 | }
|
|---|
| 81 | return ret;
|
|---|
| 82 | }
|
|---|
| 83 |
|
|---|
| 84 | void engine_load_rdrand_int(void)
|
|---|
| 85 | {
|
|---|
| 86 | if (OPENSSL_ia32cap_P[1] & (1 << (62 - 32))) {
|
|---|
| 87 | ENGINE *toadd = ENGINE_rdrand();
|
|---|
| 88 | if (!toadd)
|
|---|
| 89 | return;
|
|---|
| 90 | ERR_set_mark();
|
|---|
| 91 | ENGINE_add(toadd);
|
|---|
| 92 | /*
|
|---|
| 93 | * If the "add" worked, it gets a structural reference. So either way, we
|
|---|
| 94 | * release our just-created reference.
|
|---|
| 95 | */
|
|---|
| 96 | ENGINE_free(toadd);
|
|---|
| 97 | /*
|
|---|
| 98 | * If the "add" didn't work, it was probably a conflict because it was
|
|---|
| 99 | * already added (eg. someone calling ENGINE_load_blah then calling
|
|---|
| 100 | * ENGINE_load_builtin_engines() perhaps).
|
|---|
| 101 | */
|
|---|
| 102 | ERR_pop_to_mark();
|
|---|
| 103 | }
|
|---|
| 104 | }
|
|---|
| 105 | #else
|
|---|
| 106 | void engine_load_rdrand_int(void)
|
|---|
| 107 | {
|
|---|
| 108 | }
|
|---|
| 109 | #endif
|
|---|
