Adding upstream version 1.12.0.upstream/1.12.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 235 insertions, 0 deletions

diff --git a/src/config.c b/src/config.c
new file mode 100644
index 0000000..5302e11
--- /dev/null
+++ b/src/config.c
@@ -0,0 +1,235 @@
+/*
+ * Copyright (c) 2020-2022 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 "fido.h"
+#include "fido/config.h"
+#include "fido/es256.h"
+
+#define CMD_ENABLE_ENTATTEST	0x01
+#define CMD_TOGGLE_ALWAYS_UV	0x02
+#define CMD_SET_PIN_MINLEN	0x03
+
+static int
+config_prepare_hmac(uint8_t subcmd, const cbor_item_t *item, fido_blob_t *hmac)
+{
+	uint8_t prefix[32 + 2 * sizeof(uint8_t)], cbor[128];
+	size_t cbor_len = 0;
+
+	memset(prefix, 0xff, sizeof(prefix));
+	prefix[sizeof(prefix) - 2] = CTAP_CBOR_CONFIG;
+	prefix[sizeof(prefix) - 1] = subcmd;
+
+	if (item != NULL) {
+		if ((cbor_len = cbor_serialize(item, cbor, sizeof(cbor))) == 0) {
+			fido_log_debug("%s: cbor_serialize", __func__);
+			return -1;
+		}
+	}
+	if ((hmac->ptr = malloc(cbor_len + sizeof(prefix))) == NULL) {
+		fido_log_debug("%s: malloc", __func__);
+		return -1;
+	}
+	memcpy(hmac->ptr, prefix, sizeof(prefix));
+	memcpy(hmac->ptr + sizeof(prefix), cbor, cbor_len);
+	hmac->len = cbor_len + sizeof(prefix);
+
+	return 0;
+}
+
+static int
+config_tx(fido_dev_t *dev, uint8_t subcmd, cbor_item_t **paramv, size_t paramc,
+    const char *pin, int *ms)
+{
+	cbor_item_t *argv[4];
+	es256_pk_t *pk = NULL;
+	fido_blob_t *ecdh = NULL, f, hmac;
+	const uint8_t cmd = CTAP_CBOR_CONFIG;
+	int r = FIDO_ERR_INTERNAL;
+
+	memset(&f, 0, sizeof(f));
+	memset(&hmac, 0, sizeof(hmac));
+	memset(&argv, 0, sizeof(argv));
+
+	/* subCommand */
+	if ((argv[0] = cbor_build_uint8(subcmd)) == NULL) {
+		fido_log_debug("%s: cbor encode", __func__);
+		goto fail;
+	}
+
+	/* subCommandParams */
+	if (paramc != 0 &&
+	    (argv[1] = cbor_flatten_vector(paramv, paramc)) == NULL) {
+		fido_log_debug("%s: cbor_flatten_vector", __func__);
+		goto fail;
+	}
+
+	/* pinProtocol, pinAuth */
+	if (pin != NULL ||
+	    (fido_dev_supports_permissions(dev) && fido_dev_has_uv(dev))) {
+		if (config_prepare_hmac(subcmd, argv[1], &hmac) < 0) {
+			fido_log_debug("%s: config_prepare_hmac", __func__);
+			goto fail;
+		}
+		if ((r = fido_do_ecdh(dev, &pk, &ecdh, ms)) != FIDO_OK) {
+			fido_log_debug("%s: fido_do_ecdh", __func__);
+			goto fail;
+		}
+		if ((r = cbor_add_uv_params(dev, cmd, &hmac, pk, ecdh, pin,
+		    NULL, &argv[3], &argv[2], ms)) != FIDO_OK) {
+			fido_log_debug("%s: cbor_add_uv_params", __func__);
+			goto fail;
+		}
+	}
+
+	/* framing and transmission */
+	if (cbor_build_frame(cmd, argv, nitems(argv), &f) < 0 ||
+	    fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) {
+		fido_log_debug("%s: fido_tx", __func__);
+		r = FIDO_ERR_TX;
+		goto fail;
+	}
+
+	r = FIDO_OK;
+fail:
+	cbor_vector_free(argv, nitems(argv));
+	es256_pk_free(&pk);
+	fido_blob_free(&ecdh);
+	free(f.ptr);
+	free(hmac.ptr);
+
+	return r;
+}
+
+static int
+config_enable_entattest_wait(fido_dev_t *dev, const char *pin, int *ms)
+{
+	int r;
+
+	if ((r = config_tx(dev, CMD_ENABLE_ENTATTEST, NULL, 0, pin,
+	    ms)) != FIDO_OK)
+		return r;
+
+	return fido_rx_cbor_status(dev, ms);
+}
+
+int
+fido_dev_enable_entattest(fido_dev_t *dev, const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return (config_enable_entattest_wait(dev, pin, &ms));
+}
+
+static int
+config_toggle_always_uv_wait(fido_dev_t *dev, const char *pin, int *ms)
+{
+	int r;
+
+	if ((r = config_tx(dev, CMD_TOGGLE_ALWAYS_UV, NULL, 0, pin,
+	    ms)) != FIDO_OK)
+		return r;
+
+	return (fido_rx_cbor_status(dev, ms));
+}
+
+int
+fido_dev_toggle_always_uv(fido_dev_t *dev, const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return config_toggle_always_uv_wait(dev, pin, &ms);
+}
+
+static int
+config_pin_minlen_tx(fido_dev_t *dev, size_t len, bool force,
+    const fido_str_array_t *rpid, const char *pin, int *ms)
+{
+	cbor_item_t *argv[3];
+	int r;
+
+	memset(argv, 0, sizeof(argv));
+
+	if ((rpid == NULL && len == 0 && !force) || len > UINT8_MAX) {
+		r = FIDO_ERR_INVALID_ARGUMENT;
+		goto fail;
+	}
+	if (len && (argv[0] = cbor_build_uint8((uint8_t)len)) == NULL) {
+		fido_log_debug("%s: cbor_encode_uint8", __func__);
+		r = FIDO_ERR_INTERNAL;
+		goto fail;
+	}
+	if (rpid != NULL && (argv[1] = cbor_encode_str_array(rpid)) == NULL) {
+		fido_log_debug("%s: cbor_encode_str_array", __func__);
+		r = FIDO_ERR_INTERNAL;
+		goto fail;
+	}
+	if (force && (argv[2] = cbor_build_bool(true)) == NULL) {
+		fido_log_debug("%s: cbor_build_bool", __func__);
+		r = FIDO_ERR_INTERNAL;
+		goto fail;
+	}
+	if ((r = config_tx(dev, CMD_SET_PIN_MINLEN, argv, nitems(argv),
+	    pin, ms)) != FIDO_OK) {
+		fido_log_debug("%s: config_tx", __func__);
+		goto fail;
+	}
+
+fail:
+	cbor_vector_free(argv, nitems(argv));
+
+	return r;
+}
+
+static int
+config_pin_minlen(fido_dev_t *dev, size_t len, bool force,
+    const fido_str_array_t *rpid, const char *pin, int *ms)
+{
+	int r;
+
+	if ((r = config_pin_minlen_tx(dev, len, force, rpid, pin,
+	    ms)) != FIDO_OK)
+		return r;
+
+	return fido_rx_cbor_status(dev, ms);
+}
+
+int
+fido_dev_set_pin_minlen(fido_dev_t *dev, size_t len, const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return config_pin_minlen(dev, len, false, NULL, pin, &ms);
+}
+
+int
+fido_dev_force_pin_change(fido_dev_t *dev, const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return config_pin_minlen(dev, 0, true, NULL, pin, &ms);
+}
+
+int
+fido_dev_set_pin_minlen_rpid(fido_dev_t *dev, const char * const *rpid,
+    size_t n, const char *pin)
+{
+	fido_str_array_t sa;
+	int ms = dev->timeout_ms;
+	int r;
+
+	memset(&sa, 0, sizeof(sa));
+	if (fido_str_array_pack(&sa, rpid, n) < 0) {
+		fido_log_debug("%s: fido_str_array_pack", __func__);
+		r = FIDO_ERR_INTERNAL;
+		goto fail;
+	}
+	r = config_pin_minlen(dev, 0, false, &sa, pin, &ms);
+fail:
+	fido_str_array_free(&sa);
+
+	return r;
+}