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-rw-r--r--qemu/crypto/pbkdf.c110
1 files changed, 0 insertions, 110 deletions
diff --git a/qemu/crypto/pbkdf.c b/qemu/crypto/pbkdf.c
deleted file mode 100644
index 695cc35df..000000000
--- a/qemu/crypto/pbkdf.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * QEMU Crypto PBKDF support (Password-Based Key Derivation Function)
- *
- * Copyright (c) 2015-2016 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "crypto/pbkdf.h"
-#ifndef _WIN32
-#include <sys/resource.h>
-#endif
-
-
-static int qcrypto_pbkdf2_get_thread_cpu(unsigned long long *val_ms,
- Error **errp)
-{
-#ifdef _WIN32
- FILETIME creation_time, exit_time, kernel_time, user_time;
- ULARGE_INTEGER thread_time;
-
- if (!GetThreadTimes(GetCurrentThread(), &creation_time, &exit_time,
- &kernel_time, &user_time)) {
- error_setg(errp, "Unable to get thread CPU usage");
- return -1;
- }
-
- thread_time.LowPart = user_time.dwLowDateTime;
- thread_time.HighPart = user_time.dwHighDateTime;
-
- /* QuadPart is units of 100ns and we want ms as unit */
- *val_ms = thread_time.QuadPart / 10000ll;
- return 0;
-#elif defined(RUSAGE_THREAD)
- struct rusage ru;
- if (getrusage(RUSAGE_THREAD, &ru) < 0) {
- error_setg_errno(errp, errno, "Unable to get thread CPU usage");
- return -1;
- }
-
- *val_ms = ((ru.ru_utime.tv_sec * 1000ll) +
- (ru.ru_utime.tv_usec / 1000));
- return 0;
-#else
- *val_ms = 0;
- error_setg(errp, "Unable to calculate thread CPU usage on this platform");
- return -1;
-#endif
-}
-
-int qcrypto_pbkdf2_count_iters(QCryptoHashAlgorithm hash,
- const uint8_t *key, size_t nkey,
- const uint8_t *salt, size_t nsalt,
- Error **errp)
-{
- uint8_t out[32];
- long long int iterations = (1 << 15);
- unsigned long long delta_ms, start_ms, end_ms;
-
- while (1) {
- if (qcrypto_pbkdf2_get_thread_cpu(&start_ms, errp) < 0) {
- return -1;
- }
- if (qcrypto_pbkdf2(hash,
- key, nkey,
- salt, nsalt,
- iterations,
- out, sizeof(out),
- errp) < 0) {
- return -1;
- }
- if (qcrypto_pbkdf2_get_thread_cpu(&end_ms, errp) < 0) {
- return -1;
- }
-
- delta_ms = end_ms - start_ms;
-
- if (delta_ms > 500) {
- break;
- } else if (delta_ms < 100) {
- iterations = iterations * 10;
- } else {
- iterations = (iterations * 1000 / delta_ms);
- }
- }
-
- iterations = iterations * 1000 / delta_ms;
-
- if (iterations > INT32_MAX) {
- error_setg(errp, "Iterations %lld too large for a 32-bit int",
- iterations);
- return -1;
- }
-
- return iterations;
-}