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: #> ./vtpmctrl Created TPM device /dev/tpm0; vTPM device has fd 4, major/minor = 10/224. In another shell do #> exec 100<>/dev/tpm0 #> /bin/echo -en '\x00\xc1\x00\x00\x00\x0a\x00\x00\x00\x00' >&100 #> od -t x1 <&100 00000000 00 c4 00 00 00 0a 00 00 00 00 00000012 #> exec 100>&- Signed-off-by: Stefan Berger <[email protected]> --- vtpmctrl.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 vtpmctrl.c diff --git a/vtpmctrl.c b/vtpmctrl.c new file mode 100644 index 0000000..d39cb23 --- /dev/null +++ b/vtpmctrl.c @@ -0,0 +1,117 @@ +/* + * vtpmctrl.c -- Linux vTPM driver control program + * + * (c) Copyright IBM Corporation 2015. + * + * Author: Stefan Berger <[email protected]> + * + * 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> + +int vtpmctrl_create(void) +{ + int fd, n, option, li, serverfd, nn; + struct vtpm_new_pair vtpm_new_pair = { + .flags = 0, + }; + char tpmdev[16]; + unsigned char buffer[4096]; + const unsigned char response[] = { + 0x00, 0xc4, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00, 0x00 + }; + + 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_pair); + if (n != 0) { + perror("ioctl to create dev pair failed"); + close(fd); + return 1; + } + + snprintf(tpmdev, sizeof(tpmdev), "/dev/tpm%u", + vtpm_new_pair.tpm_dev_num); + + serverfd = vtpm_new_pair.fd; + + printf("Created TPM device %s; vTPM device has fd %d, " + "major/minor = %u/%u.\n", + tpmdev, serverfd, vtpm_new_pair.major, vtpm_new_pair.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"); + n = write(serverfd, response, sizeof(response)); + 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(); +} -- 2.4.3 ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ tpmdd-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
