f540a43052
Some highlights from NEWS: ** Added OpenSSL 3.0 compatibility. ** Removed OpenSSL 1.0 compatibility. ** Support for FIDO 2.1 "minPinLength" extension. ** Support for COSE_EDDSA, COSE_ES256, and COSE_RS1 attestation. ** Support for TPM 2.0 attestation. ** Support for device timeouts; see fido_dev_set_timeout(). ** New API calls: - es256_pk_from_EVP_PKEY; - fido_cred_attstmt_len; - fido_cred_attstmt_ptr; - fido_cred_pin_minlen; - fido_cred_set_attstmt; - fido_cred_set_pin_minlen; - fido_dev_set_pin_minlen_rpid; - fido_dev_set_timeout; - rs256_pk_from_EVP_PKEY. ** Reliability and portability fixes. ** Better handling of HID devices without identification strings; gh#381. Relnotes: Yes Sponsored by: The FreeBSD Foundation
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/*
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* Copyright (c) 2021 Yubico AB. All rights reserved.
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* Use of this source code is governed by a BSD-style
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* license that can be found in the LICENSE file.
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*/
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#include <stdint.h>
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#include <time.h>
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#include "mutator_aux.h"
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/*
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* A pseudo-random monotonic clock with a probabilistic discontinuity to
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* the end of time (as measured by struct timespec).
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*/
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extern int prng_up;
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extern int __wrap_clock_gettime(clockid_t, struct timespec *);
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extern int __real_clock_gettime(clockid_t, struct timespec *);
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extern int __wrap_usleep(unsigned int);
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static TLS struct timespec fuzz_clock;
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static void
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tick(unsigned int usec)
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{
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long long drift;
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/*
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* Simulate a jump to the end of time with 0.125% probability.
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* This condition should be gracefully handled by callers of
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* clock_gettime().
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*/
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if (uniform_random(800) < 1) {
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fuzz_clock.tv_sec = LLONG_MAX;
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fuzz_clock.tv_nsec = LONG_MAX;
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return;
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}
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drift = usec * 1000LL + (long long)uniform_random(10000000); /* 10ms */
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if (LLONG_MAX - drift < (long long)fuzz_clock.tv_nsec) {
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fuzz_clock_reset(); /* Not much we can do here. */
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} else if (drift + (long long)fuzz_clock.tv_nsec < 1000000000) {
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fuzz_clock.tv_nsec += (long)(drift);
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} else {
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fuzz_clock.tv_sec += (long)(drift / 1000000000);
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fuzz_clock.tv_nsec += (long)(drift % 1000000000);
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}
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}
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int
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__wrap_clock_gettime(clockid_t clk_id, struct timespec *tp)
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{
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if (!prng_up || clk_id != CLOCK_MONOTONIC)
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return __real_clock_gettime(clk_id, tp);
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if (uniform_random(400) < 1)
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return -1;
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tick(0);
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*tp = fuzz_clock;
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return 0;
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}
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int
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__wrap_usleep(unsigned int usec)
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{
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if (uniform_random(400) < 1)
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return -1;
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tick(usec);
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return 0;
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}
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void
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fuzz_clock_reset(void)
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{
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memset(&fuzz_clock, 0, sizeof(fuzz_clock));
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}
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