* 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.
+ * version 2.1 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
*/
#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "crypto/pbkdf.h"
#ifndef _WIN32
#include <sys/resource.h>
#endif
}
-int qcrypto_pbkdf2_count_iters(QCryptoHashAlgorithm hash,
- const uint8_t *key, size_t nkey,
- const uint8_t *salt, size_t nsalt,
- Error **errp)
+uint64_t qcrypto_pbkdf2_count_iters(QCryptoHashAlgorithm hash,
+ const uint8_t *key, size_t nkey,
+ const uint8_t *salt, size_t nsalt,
+ size_t nout,
+ Error **errp)
{
- uint8_t out[32];
- long long int iterations = (1 << 15);
+ uint64_t ret = -1;
+ g_autofree uint8_t *out = g_new(uint8_t, nout);
+ uint64_t 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;
+ goto cleanup;
}
if (qcrypto_pbkdf2(hash,
key, nkey,
salt, nsalt,
iterations,
- out, sizeof(out),
+ out, nout,
errp) < 0) {
- return -1;
+ goto cleanup;
}
if (qcrypto_pbkdf2_get_thread_cpu(&end_ms, errp) < 0) {
- return -1;
+ goto cleanup;
}
delta_ms = end_ms - start_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;
- }
+ ret = iterations;
- return iterations;
+ cleanup:
+ memset(out, 0, nout);
+ return ret;
}