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-rw-r--r--fuzz/fuzz_mgmt.c528
1 files changed, 528 insertions, 0 deletions
diff --git a/fuzz/fuzz_mgmt.c b/fuzz/fuzz_mgmt.c
new file mode 100644
index 0000000..6a5e7b6
--- /dev/null
+++ b/fuzz/fuzz_mgmt.c
@@ -0,0 +1,528 @@
+/*
+ * Copyright (c) 2019-2022 Yubico AB. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <assert.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "mutator_aux.h"
+#include "wiredata_fido2.h"
+#include "dummy.h"
+
+#include "../openbsd-compat/openbsd-compat.h"
+
+#define MAXRPID 64
+
+struct param {
+ char pin1[MAXSTR];
+ char pin2[MAXSTR];
+ struct blob reset_wire_data;
+ struct blob info_wire_data;
+ struct blob set_pin_wire_data;
+ struct blob change_pin_wire_data;
+ struct blob retry_wire_data;
+ struct blob config_wire_data;
+ int seed;
+};
+
+static const uint8_t dummy_reset_wire_data[] = {
+ WIREDATA_CTAP_INIT,
+ WIREDATA_CTAP_CBOR_INFO,
+ WIREDATA_CTAP_KEEPALIVE,
+ WIREDATA_CTAP_KEEPALIVE,
+ WIREDATA_CTAP_KEEPALIVE,
+ WIREDATA_CTAP_CBOR_STATUS,
+};
+
+static const uint8_t dummy_info_wire_data[] = {
+ WIREDATA_CTAP_INIT,
+ WIREDATA_CTAP_CBOR_INFO,
+ WIREDATA_CTAP_CBOR_INFO,
+};
+
+static const uint8_t dummy_set_pin_wire_data[] = {
+ WIREDATA_CTAP_INIT,
+ WIREDATA_CTAP_CBOR_INFO,
+ WIREDATA_CTAP_CBOR_AUTHKEY,
+ WIREDATA_CTAP_CBOR_STATUS,
+};
+
+static const uint8_t dummy_change_pin_wire_data[] = {
+ WIREDATA_CTAP_INIT,
+ WIREDATA_CTAP_CBOR_INFO,
+ WIREDATA_CTAP_CBOR_AUTHKEY,
+ WIREDATA_CTAP_CBOR_STATUS,
+};
+
+static const uint8_t dummy_retry_wire_data[] = {
+ WIREDATA_CTAP_INIT,
+ WIREDATA_CTAP_CBOR_INFO,
+ WIREDATA_CTAP_CBOR_RETRIES,
+};
+
+static const uint8_t dummy_config_wire_data[] = {
+ WIREDATA_CTAP_INIT,
+ WIREDATA_CTAP_CBOR_INFO,
+ WIREDATA_CTAP_CBOR_STATUS,
+};
+
+struct param *
+unpack(const uint8_t *ptr, size_t len)
+{
+ cbor_item_t *item = NULL, **v;
+ struct cbor_load_result cbor;
+ struct param *p;
+ int ok = -1;
+
+ if ((p = calloc(1, sizeof(*p))) == NULL ||
+ (item = cbor_load(ptr, len, &cbor)) == NULL ||
+ cbor.read != len ||
+ cbor_isa_array(item) == false ||
+ cbor_array_is_definite(item) == false ||
+ cbor_array_size(item) != 9 ||
+ (v = cbor_array_handle(item)) == NULL)
+ goto fail;
+
+ if (unpack_int(v[0], &p->seed) < 0 ||
+ unpack_string(v[1], p->pin1) < 0 ||
+ unpack_string(v[2], p->pin2) < 0 ||
+ unpack_blob(v[3], &p->reset_wire_data) < 0 ||
+ unpack_blob(v[4], &p->info_wire_data) < 0 ||
+ unpack_blob(v[5], &p->set_pin_wire_data) < 0 ||
+ unpack_blob(v[6], &p->change_pin_wire_data) < 0 ||
+ unpack_blob(v[7], &p->retry_wire_data) < 0 ||
+ unpack_blob(v[8], &p->config_wire_data) < 0)
+ goto fail;
+
+ ok = 0;
+fail:
+ if (ok < 0) {
+ free(p);
+ p = NULL;
+ }
+
+ if (item)
+ cbor_decref(&item);
+
+ return p;
+}
+
+size_t
+pack(uint8_t *ptr, size_t len, const struct param *p)
+{
+ cbor_item_t *argv[9], *array = NULL;
+ size_t cbor_alloc_len, cbor_len = 0;
+ unsigned char *cbor = NULL;
+
+ memset(argv, 0, sizeof(argv));
+
+ if ((array = cbor_new_definite_array(9)) == NULL ||
+ (argv[0] = pack_int(p->seed)) == NULL ||
+ (argv[1] = pack_string(p->pin1)) == NULL ||
+ (argv[2] = pack_string(p->pin2)) == NULL ||
+ (argv[3] = pack_blob(&p->reset_wire_data)) == NULL ||
+ (argv[4] = pack_blob(&p->info_wire_data)) == NULL ||
+ (argv[5] = pack_blob(&p->set_pin_wire_data)) == NULL ||
+ (argv[6] = pack_blob(&p->change_pin_wire_data)) == NULL ||
+ (argv[7] = pack_blob(&p->retry_wire_data)) == NULL ||
+ (argv[8] = pack_blob(&p->config_wire_data)) == NULL)
+ goto fail;
+
+ for (size_t i = 0; i < 9; i++)
+ if (cbor_array_push(array, argv[i]) == false)
+ goto fail;
+
+ if ((cbor_len = cbor_serialize_alloc(array, &cbor,
+ &cbor_alloc_len)) > len) {
+ cbor_len = 0;
+ goto fail;
+ }
+
+ memcpy(ptr, cbor, cbor_len);
+fail:
+ for (size_t i = 0; i < 9; i++)
+ if (argv[i])
+ cbor_decref(&argv[i]);
+
+ if (array)
+ cbor_decref(&array);
+
+ free(cbor);
+
+ return cbor_len;
+}
+
+size_t
+pack_dummy(uint8_t *ptr, size_t len)
+{
+ struct param dummy;
+ uint8_t blob[MAXCORPUS];
+ size_t blob_len;
+
+ memset(&dummy, 0, sizeof(dummy));
+
+ strlcpy(dummy.pin1, dummy_pin1, sizeof(dummy.pin1));
+ strlcpy(dummy.pin2, dummy_pin2, sizeof(dummy.pin2));
+
+ dummy.reset_wire_data.len = sizeof(dummy_reset_wire_data);
+ dummy.info_wire_data.len = sizeof(dummy_info_wire_data);
+ dummy.set_pin_wire_data.len = sizeof(dummy_set_pin_wire_data);
+ dummy.change_pin_wire_data.len = sizeof(dummy_change_pin_wire_data);
+ dummy.retry_wire_data.len = sizeof(dummy_retry_wire_data);
+ dummy.config_wire_data.len = sizeof(dummy_config_wire_data);
+
+ memcpy(&dummy.reset_wire_data.body, &dummy_reset_wire_data,
+ dummy.reset_wire_data.len);
+ memcpy(&dummy.info_wire_data.body, &dummy_info_wire_data,
+ dummy.info_wire_data.len);
+ memcpy(&dummy.set_pin_wire_data.body, &dummy_set_pin_wire_data,
+ dummy.set_pin_wire_data.len);
+ memcpy(&dummy.change_pin_wire_data.body, &dummy_change_pin_wire_data,
+ dummy.change_pin_wire_data.len);
+ memcpy(&dummy.retry_wire_data.body, &dummy_retry_wire_data,
+ dummy.retry_wire_data.len);
+ memcpy(&dummy.config_wire_data.body, &dummy_config_wire_data,
+ dummy.config_wire_data.len);
+
+ assert((blob_len = pack(blob, sizeof(blob), &dummy)) != 0);
+
+ if (blob_len > len) {
+ memcpy(ptr, blob, len);
+ return len;
+ }
+
+ memcpy(ptr, blob, blob_len);
+
+ return blob_len;
+}
+
+static void
+dev_reset(const struct param *p)
+{
+ fido_dev_t *dev;
+
+ set_wire_data(p->reset_wire_data.body, p->reset_wire_data.len);
+
+ if ((dev = open_dev(0)) == NULL)
+ return;
+
+ fido_dev_reset(dev);
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_get_cbor_info(const struct param *p)
+{
+ fido_dev_t *dev;
+ fido_cbor_info_t *ci;
+ uint64_t n;
+ uint8_t proto, major, minor, build, flags;
+ bool v;
+
+ set_wire_data(p->info_wire_data.body, p->info_wire_data.len);
+
+ if ((dev = open_dev(0)) == NULL)
+ return;
+
+ proto = fido_dev_protocol(dev);
+ major = fido_dev_major(dev);
+ minor = fido_dev_minor(dev);
+ build = fido_dev_build(dev);
+ flags = fido_dev_flags(dev);
+
+ consume(&proto, sizeof(proto));
+ consume(&major, sizeof(major));
+ consume(&minor, sizeof(minor));
+ consume(&build, sizeof(build));
+ consume(&flags, sizeof(flags));
+
+ if ((ci = fido_cbor_info_new()) == NULL)
+ goto out;
+
+ fido_dev_get_cbor_info(dev, ci);
+
+ for (size_t i = 0; i < fido_cbor_info_versions_len(ci); i++) {
+ char * const *sa = fido_cbor_info_versions_ptr(ci);
+ consume(sa[i], strlen(sa[i]));
+ }
+
+ for (size_t i = 0; i < fido_cbor_info_extensions_len(ci); i++) {
+ char * const *sa = fido_cbor_info_extensions_ptr(ci);
+ consume(sa[i], strlen(sa[i]));
+ }
+
+ for (size_t i = 0; i < fido_cbor_info_transports_len(ci); i++) {
+ char * const *sa = fido_cbor_info_transports_ptr(ci);
+ consume(sa[i], strlen(sa[i]));
+ }
+
+ for (size_t i = 0; i < fido_cbor_info_options_len(ci); i++) {
+ char * const *sa = fido_cbor_info_options_name_ptr(ci);
+ const bool *va = fido_cbor_info_options_value_ptr(ci);
+ consume(sa[i], strlen(sa[i]));
+ consume(&va[i], sizeof(va[i]));
+ }
+
+ /* +1 on purpose */
+ for (size_t i = 0; i <= fido_cbor_info_algorithm_count(ci); i++) {
+ const char *type = fido_cbor_info_algorithm_type(ci, i);
+ int cose = fido_cbor_info_algorithm_cose(ci, i);
+ consume_str(type);
+ consume(&cose, sizeof(cose));
+ }
+
+ for (size_t i = 0; i < fido_cbor_info_certs_len(ci); i++) {
+ char * const *na = fido_cbor_info_certs_name_ptr(ci);
+ const uint64_t *va = fido_cbor_info_certs_value_ptr(ci);
+ consume(na[i], strlen(na[i]));
+ consume(&va[i], sizeof(va[i]));
+ }
+
+ n = fido_cbor_info_maxmsgsiz(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_maxcredbloblen(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_maxcredcntlst(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_maxcredidlen(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_maxlargeblob(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_fwversion(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_minpinlen(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_maxrpid_minpinlen(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_uv_attempts(ci);
+ consume(&n, sizeof(n));
+ n = fido_cbor_info_uv_modality(ci);
+ consume(&n, sizeof(n));
+ n = (uint64_t)fido_cbor_info_rk_remaining(ci);
+ consume(&n, sizeof(n));
+
+ consume(fido_cbor_info_aaguid_ptr(ci), fido_cbor_info_aaguid_len(ci));
+ consume(fido_cbor_info_protocols_ptr(ci),
+ fido_cbor_info_protocols_len(ci));
+
+ v = fido_cbor_info_new_pin_required(ci);
+ consume(&v, sizeof(v));
+
+out:
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+
+ fido_cbor_info_free(&ci);
+}
+
+static void
+dev_set_pin(const struct param *p)
+{
+ fido_dev_t *dev;
+
+ set_wire_data(p->set_pin_wire_data.body, p->set_pin_wire_data.len);
+
+ if ((dev = open_dev(0)) == NULL)
+ return;
+
+ fido_dev_set_pin(dev, p->pin1, NULL);
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_change_pin(const struct param *p)
+{
+ fido_dev_t *dev;
+
+ set_wire_data(p->change_pin_wire_data.body, p->change_pin_wire_data.len);
+
+ if ((dev = open_dev(0)) == NULL)
+ return;
+
+ fido_dev_set_pin(dev, p->pin2, p->pin1);
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_get_retry_count(const struct param *p)
+{
+ fido_dev_t *dev;
+ int n = 0;
+
+ set_wire_data(p->retry_wire_data.body, p->retry_wire_data.len);
+
+ if ((dev = open_dev(0)) == NULL)
+ return;
+
+ fido_dev_get_retry_count(dev, &n);
+ consume(&n, sizeof(n));
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_get_uv_retry_count(const struct param *p)
+{
+ fido_dev_t *dev;
+ int n = 0;
+
+ set_wire_data(p->retry_wire_data.body, p->retry_wire_data.len);
+
+ if ((dev = open_dev(0)) == NULL)
+ return;
+
+ fido_dev_get_uv_retry_count(dev, &n);
+ consume(&n, sizeof(n));
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_enable_entattest(const struct param *p)
+{
+ fido_dev_t *dev;
+ const char *pin;
+ int r;
+
+ set_wire_data(p->config_wire_data.body, p->config_wire_data.len);
+ if ((dev = open_dev(0)) == NULL)
+ return;
+ pin = p->pin1;
+ if (strlen(pin) == 0)
+ pin = NULL;
+ r = fido_dev_enable_entattest(dev, pin);
+ consume_str(fido_strerr(r));
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_toggle_always_uv(const struct param *p)
+{
+ fido_dev_t *dev;
+ const char *pin;
+ int r;
+
+ set_wire_data(p->config_wire_data.body, p->config_wire_data.len);
+ if ((dev = open_dev(0)) == NULL)
+ return;
+ pin = p->pin1;
+ if (strlen(pin) == 0)
+ pin = NULL;
+ r = fido_dev_toggle_always_uv(dev, pin);
+ consume_str(fido_strerr(r));
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_force_pin_change(const struct param *p)
+{
+ fido_dev_t *dev;
+ const char *pin;
+ int r;
+
+ set_wire_data(p->config_wire_data.body, p->config_wire_data.len);
+ if ((dev = open_dev(0)) == NULL)
+ return;
+ pin = p->pin1;
+ if (strlen(pin) == 0)
+ pin = NULL;
+ r = fido_dev_force_pin_change(dev, pin);
+ consume_str(fido_strerr(r));
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_set_pin_minlen(const struct param *p)
+{
+ fido_dev_t *dev;
+ const char *pin;
+ int r;
+
+ set_wire_data(p->config_wire_data.body, p->config_wire_data.len);
+ if ((dev = open_dev(0)) == NULL)
+ return;
+ pin = p->pin1;
+ if (strlen(pin) == 0)
+ pin = NULL;
+ r = fido_dev_set_pin_minlen(dev, strlen(p->pin2), pin);
+ consume_str(fido_strerr(r));
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+static void
+dev_set_pin_minlen_rpid(const struct param *p)
+{
+ fido_dev_t *dev;
+ const char *rpid[MAXRPID];
+ const char *pin;
+ size_t n;
+ int r;
+
+ set_wire_data(p->config_wire_data.body, p->config_wire_data.len);
+ if ((dev = open_dev(0)) == NULL)
+ return;
+ n = uniform_random(MAXRPID);
+ for (size_t i = 0; i < n; i++)
+ rpid[i] = dummy_rp_id;
+ pin = p->pin1;
+ if (strlen(pin) == 0)
+ pin = NULL;
+ r = fido_dev_set_pin_minlen_rpid(dev, rpid, n, pin);
+ consume_str(fido_strerr(r));
+ fido_dev_close(dev);
+ fido_dev_free(&dev);
+}
+
+void
+test(const struct param *p)
+{
+ prng_init((unsigned int)p->seed);
+ fuzz_clock_reset();
+ fido_init(FIDO_DEBUG);
+ fido_set_log_handler(consume_str);
+
+ dev_reset(p);
+ dev_get_cbor_info(p);
+ dev_set_pin(p);
+ dev_change_pin(p);
+ dev_get_retry_count(p);
+ dev_get_uv_retry_count(p);
+ dev_enable_entattest(p);
+ dev_toggle_always_uv(p);
+ dev_force_pin_change(p);
+ dev_set_pin_minlen(p);
+ dev_set_pin_minlen_rpid(p);
+}
+
+void
+mutate(struct param *p, unsigned int seed, unsigned int flags) NO_MSAN
+{
+ if (flags & MUTATE_SEED)
+ p->seed = (int)seed;
+
+ if (flags & MUTATE_PARAM) {
+ mutate_string(p->pin1);
+ mutate_string(p->pin2);
+ }
+
+ if (flags & MUTATE_WIREDATA) {
+ mutate_blob(&p->reset_wire_data);
+ mutate_blob(&p->info_wire_data);
+ mutate_blob(&p->set_pin_wire_data);
+ mutate_blob(&p->change_pin_wire_data);
+ mutate_blob(&p->retry_wire_data);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 13:02:27 +0000