Adding upstream version 1.12.0.upstream/1.12.0upstream

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

1 files changed, 601 insertions, 0 deletions

diff --git a/src/dev.c b/src/dev.c
new file mode 100644
index 0000000..2d662a6
--- /dev/null
+++ b/src/dev.c
@@ -0,0 +1,601 @@
+/*
+ * Copyright (c) 2018-2022 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"
+
+#ifndef TLS
+#define TLS
+#endif
+
+static TLS bool disable_u2f_fallback;
+
+#ifdef FIDO_FUZZ
+static void
+set_random_report_len(fido_dev_t *dev)
+{
+	dev->rx_len = CTAP_MIN_REPORT_LEN +
+	    uniform_random(CTAP_MAX_REPORT_LEN - CTAP_MIN_REPORT_LEN + 1);
+	dev->tx_len = CTAP_MIN_REPORT_LEN +
+	    uniform_random(CTAP_MAX_REPORT_LEN - CTAP_MIN_REPORT_LEN + 1);
+}
+#endif
+
+static void
+fido_dev_set_extension_flags(fido_dev_t *dev, const fido_cbor_info_t *info)
+{
+	char * const	*ptr = fido_cbor_info_extensions_ptr(info);
+	size_t		 len = fido_cbor_info_extensions_len(info);
+
+	for (size_t i = 0; i < len; i++)
+		if (strcmp(ptr[i], "credProtect") == 0)
+			dev->flags |= FIDO_DEV_CRED_PROT;
+}
+
+static void
+fido_dev_set_option_flags(fido_dev_t *dev, const fido_cbor_info_t *info)
+{
+	char * const	*ptr = fido_cbor_info_options_name_ptr(info);
+	const bool	*val = fido_cbor_info_options_value_ptr(info);
+	size_t		 len = fido_cbor_info_options_len(info);
+
+	for (size_t i = 0; i < len; i++)
+		if (strcmp(ptr[i], "clientPin") == 0) {
+			dev->flags |= val[i] ?
+			    FIDO_DEV_PIN_SET : FIDO_DEV_PIN_UNSET;
+		} else if (strcmp(ptr[i], "credMgmt") == 0 ||
+			   strcmp(ptr[i], "credentialMgmtPreview") == 0) {
+			if (val[i])
+				dev->flags |= FIDO_DEV_CREDMAN;
+		} else if (strcmp(ptr[i], "uv") == 0) {
+			dev->flags |= val[i] ?
+			    FIDO_DEV_UV_SET : FIDO_DEV_UV_UNSET;
+		} else if (strcmp(ptr[i], "pinUvAuthToken") == 0) {
+			if (val[i])
+				dev->flags |= FIDO_DEV_TOKEN_PERMS;
+		}
+}
+
+static void
+fido_dev_set_protocol_flags(fido_dev_t *dev, const fido_cbor_info_t *info)
+{
+	const uint8_t	*ptr = fido_cbor_info_protocols_ptr(info);
+	size_t		 len = fido_cbor_info_protocols_len(info);
+
+	for (size_t i = 0; i < len; i++)
+		switch (ptr[i]) {
+		case CTAP_PIN_PROTOCOL1:
+			dev->flags |= FIDO_DEV_PIN_PROTOCOL1;
+			break;
+		case CTAP_PIN_PROTOCOL2:
+			dev->flags |= FIDO_DEV_PIN_PROTOCOL2;
+			break;
+		default:
+			fido_log_debug("%s: unknown protocol %u", __func__,
+			    ptr[i]);
+			break;
+		}
+}
+
+static void
+fido_dev_set_flags(fido_dev_t *dev, const fido_cbor_info_t *info)
+{
+	fido_dev_set_extension_flags(dev, info);
+	fido_dev_set_option_flags(dev, info);
+	fido_dev_set_protocol_flags(dev, info);
+}
+
+static int
+fido_dev_open_tx(fido_dev_t *dev, const char *path, int *ms)
+{
+	int r;
+
+	if (dev->io_handle != NULL) {
+		fido_log_debug("%s: handle=%p", __func__, dev->io_handle);
+		return (FIDO_ERR_INVALID_ARGUMENT);
+	}
+
+	if (dev->io.open == NULL || dev->io.close == NULL) {
+		fido_log_debug("%s: NULL open/close", __func__);
+		return (FIDO_ERR_INVALID_ARGUMENT);
+	}
+
+	if (dev->cid != CTAP_CID_BROADCAST) {
+		fido_log_debug("%s: cid=0x%x", __func__, dev->cid);
+		return (FIDO_ERR_INVALID_ARGUMENT);
+	}
+
+	if (fido_get_random(&dev->nonce, sizeof(dev->nonce)) < 0) {
+		fido_log_debug("%s: fido_get_random", __func__);
+		return (FIDO_ERR_INTERNAL);
+	}
+
+	if ((dev->io_handle = dev->io.open(path)) == NULL) {
+		fido_log_debug("%s: dev->io.open", __func__);
+		return (FIDO_ERR_INTERNAL);
+	}
+
+	if (dev->io_own) {
+		dev->rx_len = CTAP_MAX_REPORT_LEN;
+		dev->tx_len = CTAP_MAX_REPORT_LEN;
+	} else {
+		dev->rx_len = fido_hid_report_in_len(dev->io_handle);
+		dev->tx_len = fido_hid_report_out_len(dev->io_handle);
+	}
+
+#ifdef FIDO_FUZZ
+	set_random_report_len(dev);
+#endif
+
+	if (dev->rx_len < CTAP_MIN_REPORT_LEN ||
+	    dev->rx_len > CTAP_MAX_REPORT_LEN) {
+		fido_log_debug("%s: invalid rx_len %zu", __func__, dev->rx_len);
+		r = FIDO_ERR_RX;
+		goto fail;
+	}
+
+	if (dev->tx_len < CTAP_MIN_REPORT_LEN ||
+	    dev->tx_len > CTAP_MAX_REPORT_LEN) {
+		fido_log_debug("%s: invalid tx_len %zu", __func__, dev->tx_len);
+		r = FIDO_ERR_TX;
+		goto fail;
+	}
+
+	if (fido_tx(dev, CTAP_CMD_INIT, &dev->nonce, sizeof(dev->nonce),
+	    ms) < 0) {
+		fido_log_debug("%s: fido_tx", __func__);
+		r = FIDO_ERR_TX;
+		goto fail;
+	}
+
+	return (FIDO_OK);
+fail:
+	dev->io.close(dev->io_handle);
+	dev->io_handle = NULL;
+
+	return (r);
+}
+
+static int
+fido_dev_open_rx(fido_dev_t *dev, int *ms)
+{
+	fido_cbor_info_t	*info = NULL;
+	int			 reply_len;
+	int			 r;
+
+	if ((reply_len = fido_rx(dev, CTAP_CMD_INIT, &dev->attr,
+	    sizeof(dev->attr), ms)) < 0) {
+		fido_log_debug("%s: fido_rx", __func__);
+		r = FIDO_ERR_RX;
+		goto fail;
+	}
+
+#ifdef FIDO_FUZZ
+	dev->attr.nonce = dev->nonce;
+#endif
+
+	if ((size_t)reply_len != sizeof(dev->attr) ||
+	    dev->attr.nonce != dev->nonce) {
+		fido_log_debug("%s: invalid nonce", __func__);
+		r = FIDO_ERR_RX;
+		goto fail;
+	}
+
+	dev->flags = 0;
+	dev->cid = dev->attr.cid;
+
+	if (fido_dev_is_fido2(dev)) {
+		if ((info = fido_cbor_info_new()) == NULL) {
+			fido_log_debug("%s: fido_cbor_info_new", __func__);
+			r = FIDO_ERR_INTERNAL;
+			goto fail;
+		}
+		if ((r = fido_dev_get_cbor_info_wait(dev, info,
+		    ms)) != FIDO_OK) {
+			fido_log_debug("%s: fido_dev_cbor_info_wait: %d",
+			    __func__, r);
+			if (disable_u2f_fallback)
+				goto fail;
+			fido_log_debug("%s: falling back to u2f", __func__);
+			fido_dev_force_u2f(dev);
+		} else {
+			fido_dev_set_flags(dev, info);
+		}
+	}
+
+	if (fido_dev_is_fido2(dev) && info != NULL) {
+		dev->maxmsgsize = fido_cbor_info_maxmsgsiz(info);
+		fido_log_debug("%s: FIDO_MAXMSG=%d, maxmsgsiz=%lu", __func__,
+		    FIDO_MAXMSG, (unsigned long)dev->maxmsgsize);
+	}
+
+	r = FIDO_OK;
+fail:
+	fido_cbor_info_free(&info);
+
+	if (r != FIDO_OK) {
+		dev->io.close(dev->io_handle);
+		dev->io_handle = NULL;
+	}
+
+	return (r);
+}
+
+static int
+fido_dev_open_wait(fido_dev_t *dev, const char *path, int *ms)
+{
+	int r;
+
+#ifdef USE_WINHELLO
+	if (strcmp(path, FIDO_WINHELLO_PATH) == 0)
+		return (fido_winhello_open(dev));
+#endif
+	if ((r = fido_dev_open_tx(dev, path, ms)) != FIDO_OK ||
+	    (r = fido_dev_open_rx(dev, ms)) != FIDO_OK)
+		return (r);
+
+	return (FIDO_OK);
+}
+
+static void
+run_manifest(fido_dev_info_t *devlist, size_t ilen, size_t *olen,
+    const char *type, int (*manifest)(fido_dev_info_t *, size_t, size_t *))
+{
+	size_t ndevs = 0;
+	int r;
+
+	if (*olen >= ilen) {
+		fido_log_debug("%s: skipping %s", __func__, type);
+		return;
+	}
+	if ((r = manifest(devlist + *olen, ilen - *olen, &ndevs)) != FIDO_OK)
+		fido_log_debug("%s: %s: 0x%x", __func__, type, r);
+	fido_log_debug("%s: found %zu %s device%s", __func__, ndevs, type,
+	    ndevs == 1 ? "" : "s");
+	*olen += ndevs;
+}
+
+int
+fido_dev_info_manifest(fido_dev_info_t *devlist, size_t ilen, size_t *olen)
+{
+	*olen = 0;
+
+	run_manifest(devlist, ilen, olen, "hid", fido_hid_manifest);
+#ifdef USE_NFC
+	run_manifest(devlist, ilen, olen, "nfc", fido_nfc_manifest);
+#endif
+#ifdef USE_PCSC
+	run_manifest(devlist, ilen, olen, "pcsc", fido_pcsc_manifest);
+#endif
+#ifdef USE_WINHELLO
+	run_manifest(devlist, ilen, olen, "winhello", fido_winhello_manifest);
+#endif
+
+	return (FIDO_OK);
+}
+
+int
+fido_dev_open_with_info(fido_dev_t *dev)
+{
+	int ms = dev->timeout_ms;
+
+	if (dev->path == NULL)
+		return (FIDO_ERR_INVALID_ARGUMENT);
+
+	return (fido_dev_open_wait(dev, dev->path, &ms));
+}
+
+int
+fido_dev_open(fido_dev_t *dev, const char *path)
+{
+	int ms = dev->timeout_ms;
+
+#ifdef USE_NFC
+	if (fido_is_nfc(path) && fido_dev_set_nfc(dev) < 0) {
+		fido_log_debug("%s: fido_dev_set_nfc", __func__);
+		return FIDO_ERR_INTERNAL;
+	}
+#endif
+#ifdef USE_PCSC
+	if (fido_is_pcsc(path) && fido_dev_set_pcsc(dev) < 0) {
+		fido_log_debug("%s: fido_dev_set_pcsc", __func__);
+		return FIDO_ERR_INTERNAL;
+	}
+#endif
+
+	return (fido_dev_open_wait(dev, path, &ms));
+}
+
+int
+fido_dev_close(fido_dev_t *dev)
+{
+#ifdef USE_WINHELLO
+	if (dev->flags & FIDO_DEV_WINHELLO)
+		return (fido_winhello_close(dev));
+#endif
+	if (dev->io_handle == NULL || dev->io.close == NULL)
+		return (FIDO_ERR_INVALID_ARGUMENT);
+
+	dev->io.close(dev->io_handle);
+	dev->io_handle = NULL;
+	dev->cid = CTAP_CID_BROADCAST;
+
+	return (FIDO_OK);
+}
+
+int
+fido_dev_set_sigmask(fido_dev_t *dev, const fido_sigset_t *sigmask)
+{
+	if (dev->io_handle == NULL || sigmask == NULL)
+		return (FIDO_ERR_INVALID_ARGUMENT);
+
+#ifdef USE_NFC
+	if (dev->transport.rx == fido_nfc_rx && dev->io.read == fido_nfc_read)
+		return (fido_nfc_set_sigmask(dev->io_handle, sigmask));
+#endif
+	if (dev->transport.rx == NULL && dev->io.read == fido_hid_read)
+		return (fido_hid_set_sigmask(dev->io_handle, sigmask));
+
+	return (FIDO_ERR_INVALID_ARGUMENT);
+}
+
+int
+fido_dev_cancel(fido_dev_t *dev)
+{
+	int ms = dev->timeout_ms;
+
+#ifdef USE_WINHELLO
+	if (dev->flags & FIDO_DEV_WINHELLO)
+		return (fido_winhello_cancel(dev));
+#endif
+	if (fido_dev_is_fido2(dev) == false)
+		return (FIDO_ERR_INVALID_ARGUMENT);
+	if (fido_tx(dev, CTAP_CMD_CANCEL, NULL, 0, &ms) < 0)
+		return (FIDO_ERR_TX);
+
+	return (FIDO_OK);
+}
+
+int
+fido_dev_set_io_functions(fido_dev_t *dev, const fido_dev_io_t *io)
+{
+	if (dev->io_handle != NULL) {
+		fido_log_debug("%s: non-NULL handle", __func__);
+		return (FIDO_ERR_INVALID_ARGUMENT);
+	}
+
+	if (io == NULL || io->open == NULL || io->close == NULL ||
+	    io->read == NULL || io->write == NULL) {
+		fido_log_debug("%s: NULL function", __func__);
+		return (FIDO_ERR_INVALID_ARGUMENT);
+	}
+
+	dev->io = *io;
+	dev->io_own = true;
+
+	return (FIDO_OK);
+}
+
+int
+fido_dev_set_transport_functions(fido_dev_t *dev, const fido_dev_transport_t *t)
+{
+	if (dev->io_handle != NULL) {
+		fido_log_debug("%s: non-NULL handle", __func__);
+		return (FIDO_ERR_INVALID_ARGUMENT);
+	}
+
+	dev->transport = *t;
+	dev->io_own = true;
+
+	return (FIDO_OK);
+}
+
+void *
+fido_dev_io_handle(const fido_dev_t *dev)
+{
+
+	return (dev->io_handle);
+}
+
+void
+fido_init(int flags)
+{
+	if (flags & FIDO_DEBUG || getenv("FIDO_DEBUG") != NULL)
+		fido_log_init();
+
+	disable_u2f_fallback = (flags & FIDO_DISABLE_U2F_FALLBACK);
+}
+
+fido_dev_t *
+fido_dev_new(void)
+{
+	fido_dev_t *dev;
+
+	if ((dev = calloc(1, sizeof(*dev))) == NULL)
+		return (NULL);
+
+	dev->cid = CTAP_CID_BROADCAST;
+	dev->timeout_ms = -1;
+	dev->io = (fido_dev_io_t) {
+		&fido_hid_open,
+		&fido_hid_close,
+		&fido_hid_read,
+		&fido_hid_write,
+	};
+
+	return (dev);
+}
+
+fido_dev_t *
+fido_dev_new_with_info(const fido_dev_info_t *di)
+{
+	fido_dev_t *dev;
+
+	if ((dev = calloc(1, sizeof(*dev))) == NULL)
+		return (NULL);
+
+#if 0
+	if (di->io.open == NULL || di->io.close == NULL ||
+	    di->io.read == NULL || di->io.write == NULL) {
+		fido_log_debug("%s: NULL function", __func__);
+		fido_dev_free(&dev);
+		return (NULL);
+	}
+#endif
+
+	dev->io = di->io;
+	dev->io_own = di->transport.tx != NULL || di->transport.rx != NULL;
+	dev->transport = di->transport;
+	dev->cid = CTAP_CID_BROADCAST;
+	dev->timeout_ms = -1;
+
+	if ((dev->path = strdup(di->path)) == NULL) {
+		fido_log_debug("%s: strdup", __func__);
+		fido_dev_free(&dev);
+		return (NULL);
+	}
+
+	return (dev);
+}
+
+void
+fido_dev_free(fido_dev_t **dev_p)
+{
+	fido_dev_t *dev;
+
+	if (dev_p == NULL || (dev = *dev_p) == NULL)
+		return;
+
+	free(dev->path);
+	free(dev);
+
+	*dev_p = NULL;
+}
+
+uint8_t
+fido_dev_protocol(const fido_dev_t *dev)
+{
+	return (dev->attr.protocol);
+}
+
+uint8_t
+fido_dev_major(const fido_dev_t *dev)
+{
+	return (dev->attr.major);
+}
+
+uint8_t
+fido_dev_minor(const fido_dev_t *dev)
+{
+	return (dev->attr.minor);
+}
+
+uint8_t
+fido_dev_build(const fido_dev_t *dev)
+{
+	return (dev->attr.build);
+}
+
+uint8_t
+fido_dev_flags(const fido_dev_t *dev)
+{
+	return (dev->attr.flags);
+}
+
+bool
+fido_dev_is_fido2(const fido_dev_t *dev)
+{
+	return (dev->attr.flags & FIDO_CAP_CBOR);
+}
+
+bool
+fido_dev_is_winhello(const fido_dev_t *dev)
+{
+	return (dev->flags & FIDO_DEV_WINHELLO);
+}
+
+bool
+fido_dev_supports_pin(const fido_dev_t *dev)
+{
+	return (dev->flags & (FIDO_DEV_PIN_SET|FIDO_DEV_PIN_UNSET));
+}
+
+bool
+fido_dev_has_pin(const fido_dev_t *dev)
+{
+	return (dev->flags & FIDO_DEV_PIN_SET);
+}
+
+bool
+fido_dev_supports_cred_prot(const fido_dev_t *dev)
+{
+	return (dev->flags & FIDO_DEV_CRED_PROT);
+}
+
+bool
+fido_dev_supports_credman(const fido_dev_t *dev)
+{
+	return (dev->flags & FIDO_DEV_CREDMAN);
+}
+
+bool
+fido_dev_supports_uv(const fido_dev_t *dev)
+{
+	return (dev->flags & (FIDO_DEV_UV_SET|FIDO_DEV_UV_UNSET));
+}
+
+bool
+fido_dev_has_uv(const fido_dev_t *dev)
+{
+	return (dev->flags & FIDO_DEV_UV_SET);
+}
+
+bool
+fido_dev_supports_permissions(const fido_dev_t *dev)
+{
+	return (dev->flags & FIDO_DEV_TOKEN_PERMS);
+}
+
+void
+fido_dev_force_u2f(fido_dev_t *dev)
+{
+	dev->attr.flags &= (uint8_t)~FIDO_CAP_CBOR;
+	dev->flags = 0;
+}
+
+void
+fido_dev_force_fido2(fido_dev_t *dev)
+{
+	dev->attr.flags |= FIDO_CAP_CBOR;
+}
+
+uint8_t
+fido_dev_get_pin_protocol(const fido_dev_t *dev)
+{
+	if (dev->flags & FIDO_DEV_PIN_PROTOCOL2)
+		return (CTAP_PIN_PROTOCOL2);
+	else if (dev->flags & FIDO_DEV_PIN_PROTOCOL1)
+		return (CTAP_PIN_PROTOCOL1);
+
+	return (0);
+}
+
+uint64_t
+fido_dev_maxmsgsize(const fido_dev_t *dev)
+{
+	return (dev->maxmsgsize);
+}
+
+int
+fido_dev_set_timeout(fido_dev_t *dev, int ms)
+{
+	if (ms < -1)
+		return (FIDO_ERR_INVALID_ARGUMENT);
+
+	dev->timeout_ms = ms;
+
+	return (FIDO_OK);
+}