[tpmdd-devel,v6,11/11] A test program for vTPM device creation
diff mbox

Message ID 1457545170-30120-12-git-send-email-stefanb@linux.vnet.ibm.com
State New
Headers show

Commit Message

Stefan Berger March 9, 2016, 5:39 p.m. UTC
This patch provides a program that is for testing purposes only.

Build it using the following commands:

make headers_install ARCH=x86_64  INSTALL_HDR_PATH=/usr

gcc vtpmctrl.c -o vtpmctrl

To use it:

To create a device pair and have vtpmctrl listen for commands, display
them and respond with TPM success messages do:

Created TPM device /dev/tpm0; vTPM device has fd 4, major/minor = 10/224.

In another shell do

00000000 00 c4 00 00 00 0a 00 00 00 00
00000012

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
---
 vtpmctrl.c | 163 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 vtpmctrl.c

Comments

Stefan Berger March 10, 2016, 8:57 p.m. UTC | #1
Stefan Berger <stefanb@linux.vnet.ibm.com> wrote on 03/09/2016 12:39:30 
PM:
> 
> This patch provides a program that is for testing purposes only.
> 
> Build it using the following commands:
> 
> make headers_install ARCH=x86_64  INSTALL_HDR_PATH=/usr
> 
> gcc vtpmctrl.c -o vtpmctrl
> 
> To use it:
> 
> To create a device pair and have vtpmctrl listen for commands, display
> them and respond with TPM success messages do:
> 
> Created TPM device /dev/tpm0; vTPM device has fd 4, major/minor = 
10/224.
> 
> In another shell do
> 
> 00000000 00 c4 00 00 00 0a 00 00 00 00
> 00000012


This test program is now available as part of a test suite at:

https://github.com/stefanberger/linux-vtpm-tests


   Stefan
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Jarkko Sakkinen March 11, 2016, 10:30 a.m. UTC | #2
On Thu, Mar 10, 2016 at 03:57:58PM -0500, Stefan Berger wrote:
>    Stefan Berger <stefanb@linux.vnet.ibm.com> wrote on 03/09/2016 12:39:30
>    PM:
>    >
>    > This patch provides a program that is for testing purposes only.
>    >
>    > Build it using the following commands:
>    >
>    > make headers_install ARCH=x86_64  INSTALL_HDR_PATH=/usr
>    >
>    > gcc vtpmctrl.c -o vtpmctrl
>    >
>    > To use it:
>    >
>    > To create a device pair and have vtpmctrl listen for commands, display
>    > them and respond with TPM success messages do:
>    >
>    > Created TPM device /dev/tpm0; vTPM device has fd 4, major/minor =
>    10/224.
>    >
>    > In another shell do
>    >
>    > 00000000 00 c4 00 00 00 0a 00 00 00 00
>    > 00000012
> 
>    This test program is now available as part of a test suite at:
> 
>    https://github.com/stefanberger/linux-vtpm-tests

I've ported TPM 2.0 simulator proxy here

git://git.infradead.org/users/jjs/tpm2-scripts.git

At the moment it gets blocked on write() at client side and on read() at
server side. Haven't yet applied the timeouts patch but I'd expect
things to work without that patch since it's a separate patch

My environment is such that:

* I have built my environment with
  git://git.infradead.org/users/jjs/buildroot-tpmdd.git [1]
* I'm using QEMU.
* I have MS TPM 2.0 emulator running on the host side with wine.
* I use tpm2-simulator-vtpm script to connect the simulator to
  a tpm device.

If I run for example my tpm2-list-handles script it gets stuck
and read call to the returned fd inside my test script never
returns.

>       Stefan

[1] make tpmdd_defconfig && make and you will get a legacy/UEFI
    bootable tpmdd.img + bleeding edge kernel from my master
    branch.

/Jarkko

------------------------------------------------------------------------------
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Accelerate data analysis in your applications with
Intel Data Analytics Acceleration Library.
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Patch
diff mbox

diff --git a/vtpmctrl.c b/vtpmctrl.c
new file mode 100644
index 0000000..071be45
--- /dev/null
+++ b/vtpmctrl.c
@@ -0,0 +1,163 @@ 
+/*
+ * vtpmctrl.c -- Linux vTPM driver control program
+ *
+ * (c) Copyright IBM Corporation 2015.
+ *
+ * Author: Stefan Berger <stefanb@us.ibm.com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * Neither the names of the IBM Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include <linux/vtpm.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <endian.h>
+#include <stdint.h>
+
+int vtpmctrl_create(void)
+{
+	int fd, n, option, li, serverfd, nn;
+	struct vtpm_new_dev vtpm_new_dev = {
+		.flags = 0,
+	};
+	char tpmdev[16];
+	unsigned char buffer[4096];
+	const unsigned char tpm_startup_resp[] = {
+		0x00, 0xc4, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00, 0x00
+	};
+	const unsigned char timeout_req[] = {
+		0x00, 0xc1, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x65,
+		0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00,
+		0x01, 0x15
+	};
+	const unsigned char timeout_res[] = {
+		0x00, 0xc4, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00,
+		0x00, 0x01, 0x00, 0x00,
+		0x00, 0x02, 0x00, 0x00,
+		0x00, 0x03, 0x00, 0x00,
+		0x00, 0x04, 0x00, 0x00,
+	};
+	const unsigned char duration_req[] = {
+		0x00, 0xc1, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x65,
+		0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00,
+		0x01, 0x20
+	};
+	const unsigned char duration_res[] = {
+		0x00, 0xc4, 0x00, 0x00, 0x00, 0x1a, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00,
+		0x00, 0x01, 0x00, 0x00,
+		0x00, 0x02, 0x00, 0x00,
+		0x00, 0x03, 0x00, 0x00,
+	};
+	uint32_t ordinal;
+
+	fd = open("/dev/vtpmx", O_RDWR);
+	if (fd < 0) {
+		perror("Could not open /dev/vtpmx");
+		return 1;
+	}
+
+	n = ioctl(fd, VTPM_NEW_DEV, &vtpm_new_dev);
+	if (n != 0) {
+		perror("ioctl to create new device failed");
+		close(fd);
+		return 1;
+	}
+
+	snprintf(tpmdev, sizeof(tpmdev), "/dev/tpm%u",
+		 vtpm_new_dev.dev_num);
+
+	serverfd = vtpm_new_dev.fd;
+
+	printf("Created TPM device %s; vTPM device has fd %d, "
+	       "major/minor = %u/%u.\n",
+	       tpmdev, serverfd, vtpm_new_dev.major, vtpm_new_dev.minor);
+
+	close(fd);
+
+	while (1) {
+		n = read(serverfd, buffer, sizeof(buffer));
+		if (n > 0) {
+			printf("Request with %d bytes:\n", n);
+			nn = 0;
+			while (nn < n) {
+				printf("0x%02x ", buffer[nn]);
+				nn++;
+				if (nn % 16 == 0)
+					printf("\n");
+			}
+			printf("\n");
+			ordinal = be32toh(*(uint32_t *)&(buffer[6]));
+			switch (ordinal) {
+			case 0x99:
+				n = write(serverfd, tpm_startup_resp, sizeof(tpm_startup_resp));
+				break;
+			case 0x65:
+				if (!memcmp(timeout_req, buffer, sizeof(timeout_req))) {
+					n = write(serverfd, timeout_res, sizeof(timeout_res));
+
+				} else if (!memcmp(duration_req, buffer, sizeof(duration_req))) {
+					n = write(serverfd, duration_res, sizeof(duration_res));
+				} else {
+					n = write(serverfd, tpm_startup_resp, sizeof(tpm_startup_resp));
+				}
+				break;
+			default:
+				n = write(serverfd, tpm_startup_resp, sizeof(tpm_startup_resp));
+				break;
+			}
+			if (n < 0) {
+				printf("Error from writing the response: %s\n",
+				       strerror(errno));
+				break;
+			} else {
+				printf("Sent response with %d bytes.\n", n);
+			}
+		} else {
+			break;
+		}
+	}
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	return vtpmctrl_create();
+}