Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 1 | /* |
| 2 | * QEMU Crypto PBKDF support (Password-Based Key Derivation Function) |
| 3 | * |
| 4 | * Copyright (c) 2015-2016 Red Hat, Inc. |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
Thomas Huth | b7cbb87 | 2019-02-13 16:54:59 +0100 | [diff] [blame] | 9 | * version 2.1 of the License, or (at your option) any later version. |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 22 | #include "qapi/error.h" |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 23 | #include "crypto/pbkdf.h" |
| 24 | #ifndef _WIN32 |
| 25 | #include <sys/resource.h> |
| 26 | #endif |
Jungmin Park | bf98afc | 2022-08-24 21:37:06 +0900 | [diff] [blame] | 27 | #ifdef CONFIG_DARWIN |
| 28 | #include <mach/mach_init.h> |
| 29 | #include <mach/thread_act.h> |
| 30 | #include <mach/mach_port.h> |
| 31 | #endif |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 32 | |
| 33 | |
| 34 | static int qcrypto_pbkdf2_get_thread_cpu(unsigned long long *val_ms, |
| 35 | Error **errp) |
| 36 | { |
| 37 | #ifdef _WIN32 |
| 38 | FILETIME creation_time, exit_time, kernel_time, user_time; |
| 39 | ULARGE_INTEGER thread_time; |
| 40 | |
| 41 | if (!GetThreadTimes(GetCurrentThread(), &creation_time, &exit_time, |
| 42 | &kernel_time, &user_time)) { |
| 43 | error_setg(errp, "Unable to get thread CPU usage"); |
| 44 | return -1; |
| 45 | } |
| 46 | |
| 47 | thread_time.LowPart = user_time.dwLowDateTime; |
| 48 | thread_time.HighPart = user_time.dwHighDateTime; |
| 49 | |
| 50 | /* QuadPart is units of 100ns and we want ms as unit */ |
| 51 | *val_ms = thread_time.QuadPart / 10000ll; |
| 52 | return 0; |
Jungmin Park | bf98afc | 2022-08-24 21:37:06 +0900 | [diff] [blame] | 53 | #elif defined(CONFIG_DARWIN) |
| 54 | mach_port_t thread; |
| 55 | kern_return_t kr; |
| 56 | mach_msg_type_number_t count; |
| 57 | thread_basic_info_data_t info; |
| 58 | |
| 59 | thread = mach_thread_self(); |
| 60 | count = THREAD_BASIC_INFO_COUNT; |
| 61 | kr = thread_info(thread, THREAD_BASIC_INFO, (thread_info_t)&info, &count); |
| 62 | mach_port_deallocate(mach_task_self(), thread); |
| 63 | if (kr != KERN_SUCCESS || (info.flags & TH_FLAGS_IDLE) != 0) { |
| 64 | error_setg_errno(errp, errno, "Unable to get thread CPU usage"); |
| 65 | return -1; |
| 66 | } |
| 67 | |
| 68 | *val_ms = ((info.user_time.seconds * 1000ll) + |
| 69 | (info.user_time.microseconds / 1000)); |
| 70 | return 0; |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 71 | #elif defined(RUSAGE_THREAD) |
| 72 | struct rusage ru; |
| 73 | if (getrusage(RUSAGE_THREAD, &ru) < 0) { |
| 74 | error_setg_errno(errp, errno, "Unable to get thread CPU usage"); |
| 75 | return -1; |
| 76 | } |
| 77 | |
| 78 | *val_ms = ((ru.ru_utime.tv_sec * 1000ll) + |
| 79 | (ru.ru_utime.tv_usec / 1000)); |
| 80 | return 0; |
| 81 | #else |
| 82 | *val_ms = 0; |
| 83 | error_setg(errp, "Unable to calculate thread CPU usage on this platform"); |
| 84 | return -1; |
| 85 | #endif |
| 86 | } |
| 87 | |
Daniel P. Berrange | 59b060b | 2016-09-12 12:50:12 +0100 | [diff] [blame] | 88 | uint64_t qcrypto_pbkdf2_count_iters(QCryptoHashAlgorithm hash, |
| 89 | const uint8_t *key, size_t nkey, |
| 90 | const uint8_t *salt, size_t nsalt, |
Daniel P. Berrange | e74aabc | 2016-09-07 12:43:29 +0100 | [diff] [blame] | 91 | size_t nout, |
Daniel P. Berrange | 59b060b | 2016-09-12 12:50:12 +0100 | [diff] [blame] | 92 | Error **errp) |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 93 | { |
Daniel P. Berrange | 8813800 | 2016-09-07 12:38:07 +0100 | [diff] [blame] | 94 | uint64_t ret = -1; |
Daniel P. Berrangé | 57b9f11 | 2019-07-23 16:22:36 +0100 | [diff] [blame] | 95 | g_autofree uint8_t *out = g_new(uint8_t, nout); |
Daniel P. Berrange | 59b060b | 2016-09-12 12:50:12 +0100 | [diff] [blame] | 96 | uint64_t iterations = (1 << 15); |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 97 | unsigned long long delta_ms, start_ms, end_ms; |
| 98 | |
| 99 | while (1) { |
| 100 | if (qcrypto_pbkdf2_get_thread_cpu(&start_ms, errp) < 0) { |
Daniel P. Berrange | 8813800 | 2016-09-07 12:38:07 +0100 | [diff] [blame] | 101 | goto cleanup; |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 102 | } |
| 103 | if (qcrypto_pbkdf2(hash, |
| 104 | key, nkey, |
| 105 | salt, nsalt, |
| 106 | iterations, |
Daniel P. Berrange | e74aabc | 2016-09-07 12:43:29 +0100 | [diff] [blame] | 107 | out, nout, |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 108 | errp) < 0) { |
Daniel P. Berrange | 8813800 | 2016-09-07 12:38:07 +0100 | [diff] [blame] | 109 | goto cleanup; |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 110 | } |
| 111 | if (qcrypto_pbkdf2_get_thread_cpu(&end_ms, errp) < 0) { |
Daniel P. Berrange | 8813800 | 2016-09-07 12:38:07 +0100 | [diff] [blame] | 112 | goto cleanup; |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | delta_ms = end_ms - start_ms; |
| 116 | |
| 117 | if (delta_ms > 500) { |
| 118 | break; |
| 119 | } else if (delta_ms < 100) { |
| 120 | iterations = iterations * 10; |
| 121 | } else { |
| 122 | iterations = (iterations * 1000 / delta_ms); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | iterations = iterations * 1000 / delta_ms; |
| 127 | |
Daniel P. Berrange | 8813800 | 2016-09-07 12:38:07 +0100 | [diff] [blame] | 128 | ret = iterations; |
| 129 | |
| 130 | cleanup: |
Daniel P. Berrange | e74aabc | 2016-09-07 12:43:29 +0100 | [diff] [blame] | 131 | memset(out, 0, nout); |
Daniel P. Berrange | 8813800 | 2016-09-07 12:38:07 +0100 | [diff] [blame] | 132 | return ret; |
Daniel P. Berrange | 37788f2 | 2015-10-14 13:14:04 +0100 | [diff] [blame] | 133 | } |