Add simple RPMB host testing tool. It can be used to program key, write and read data block, and retrieve write counter. Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx> --- MAINTAINERS | 1 + tools/Makefile | 16 +- tools/rpmb/.gitignore | 2 + tools/rpmb/Makefile | 32 ++ tools/rpmb/rpmb.c | 807 ++++++++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 853 insertions(+), 5 deletions(-) create mode 100644 tools/rpmb/.gitignore create mode 100644 tools/rpmb/Makefile create mode 100644 tools/rpmb/rpmb.c diff --git a/MAINTAINERS b/MAINTAINERS index 8704b40eaf27..75e63de9283a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9432,6 +9432,7 @@ F: drivers/char/rpmb/* F: include/uapi/linux/rpmb.h F: include/linux/rpmb.h F: Documentation/ABI/testing/sysfs-class-rpmb +F: tools/rpmb/ RTL2830 MEDIA DRIVER M: Antti Palosaari <crope@xxxxxx> diff --git a/tools/Makefile b/tools/Makefile index 60c7e6c8ff17..5b37ccd95cab 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -19,6 +19,7 @@ help: @echo ' lguest - a minimal 32-bit x86 hypervisor' @echo ' net - misc networking tools' @echo ' perf - Linux performance measurement and analysis tool' + @echo ' rpmb - Replay protected memory block access tool' @echo ' selftests - various kernel selftests' @echo ' spi - spi tools' @echo ' objtool - an ELF object analysis tool' @@ -55,7 +56,8 @@ acpi: FORCE cpupower: FORCE $(call descend,power/$@) -cgroup firewire hv guest spi usb virtio vm net iio gpio objtool: FORCE +cgroup firewire hv guest rpmb spi usb virtio vm net iio gpio objtool: FORCE +cgroup firewire hv guest rpmb spi usb virtio vm net iio: FORCE $(call descend,$@) liblockdep: FORCE @@ -85,7 +87,7 @@ freefall: FORCE $(call descend,laptop/$@) all: acpi cgroup cpupower hv firewire lguest \ - perf selftests turbostat usb \ + perf rpmb selftests turbostat usb \ virtio vm net x86_energy_perf_policy \ tmon freefall objtool @@ -95,7 +97,8 @@ acpi_install: cpupower_install: $(call descend,power/$(@:_install=),install) -cgroup_install firewire_install hv_install lguest_install perf_install usb_install virtio_install vm_install net_install objtool_install: +cgroup_install firewire_install hv_install lguest_install perf_install rpmb_install usb_install virtio_install vm_install net_install objtool_install: +cgroup_install firewire_install hv_install lguest_install perf_install rpmb_install usb_install virtio_install vm_install net_install: $(call descend,$(@:_install=),install) selftests_install: @@ -111,7 +114,7 @@ freefall_install: $(call descend,laptop/$(@:_install=),install) install: acpi_install cgroup_install cpupower_install hv_install firewire_install lguest_install \ - perf_install selftests_install turbostat_install usb_install \ + perf_install rpmb_install selftests_install turbostat_install usb_install \ virtio_install vm_install net_install x86_energy_perf_policy_install \ tmon_install freefall_install objtool_install @@ -139,6 +142,9 @@ libsubcmd_clean: perf_clean: $(call descend,$(@:_clean=),clean) +rpmb_clean: + $(call descend,$(@:_clean=),clean) + selftests_clean: $(call descend,testing/$(@:_clean=),clean) @@ -155,7 +161,7 @@ build_clean: $(call descend,build,clean) clean: acpi_clean cgroup_clean cpupower_clean hv_clean firewire_clean lguest_clean \ - perf_clean selftests_clean turbostat_clean spi_clean usb_clean virtio_clean \ + perf_clean rpmb_clean selftests_clean turbostat_clean spi_clean usb_clean virtio_clean \ vm_clean net_clean iio_clean x86_energy_perf_policy_clean tmon_clean \ freefall_clean build_clean libbpf_clean libsubcmd_clean liblockdep_clean \ gpio_clean objtool_clean diff --git a/tools/rpmb/.gitignore b/tools/rpmb/.gitignore new file mode 100644 index 000000000000..218f680548e6 --- /dev/null +++ b/tools/rpmb/.gitignore @@ -0,0 +1,2 @@ +*.o +rpmb diff --git a/tools/rpmb/Makefile b/tools/rpmb/Makefile new file mode 100644 index 000000000000..e0e51f306dac --- /dev/null +++ b/tools/rpmb/Makefile @@ -0,0 +1,32 @@ +CC = $(CROSS_COMPILE)gcc +LD = $(CROSS_COMPILE)ld +PKG_CONFIG = $(CROSS_COMPILE)pkg-config + +ifeq ($(srctree),) +srctree := $(patsubst %/,%,$(dir $(shell pwd))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +#$(info Determined 'srctree' to be $(srctree)) +endif + +INSTALL = install +prefix ?= /usr/local +bindir = $(prefix)/bin + + +CFLAGS += -D__EXPORTED_HEADERS__ +CFLAGS += -I$(srctree)/include/uapi -I$(srctree)/include +LDLIBS += $(shell $(PKG_CONFIG) --libs libcrypto) + +prog := rpmb + +all : $(prog) + +$(prog): rpmb.o + +clean : + $(RM) $(prog) *.o + +install: $(prog) + $(INSTALL) -m755 -d $(DESTDIR)$(bindir) + $(INSTALL) $(prog) $(DESTDIR)$(bindir) + diff --git a/tools/rpmb/rpmb.c b/tools/rpmb/rpmb.c new file mode 100644 index 000000000000..e55f4d4e7ef7 --- /dev/null +++ b/tools/rpmb/rpmb.c @@ -0,0 +1,807 @@ +/****************************************************************************** + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2016 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * Contact Information: + * Intel Corporation. + * linux-mei@xxxxxxxxxxxxxxx + * http://www.intel.com + * + * BSD LICENSE + * + * Copyright(c) 2016 Intel Corporation. All rights reserved. + * 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 name Intel 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 + * OWNER 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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <dirent.h> +#include <sys/stat.h> +#include <unistd.h> +#include <fcntl.h> +#include <libgen.h> +#include <limits.h> +#include <ctype.h> +#include <errno.h> +#include <stdint.h> +#include <stdbool.h> + +#include <openssl/engine.h> +#include <openssl/hmac.h> + +#include "linux/rpmb.h" + +#define RPMB_KEY_SIZE 32 +#define RPMB_MAC_SIZE 32 +#define RPMB_NONCE_SIZE 16 + +#define rpmb_msg(fmt, ARGS...) \ + fprintf(stderr, "rpmb: " fmt, ##ARGS) + +#define rpmb_err(fmt, ARGS...) \ + fprintf(stderr, "rpmb: error: " fmt, ##ARGS) + +static const char *rpmb_op_str(uint16_t op) +{ +#define RPMB_OP(_op) case RPMB_##_op: return #_op + + switch (op) { + RPMB_OP(PROGRAM_KEY); + RPMB_OP(GET_WRITE_COUNTER); + RPMB_OP(WRITE_DATA); + RPMB_OP(READ_DATA); + RPMB_OP(RESULT_READ); + break; + default: + return "unknown"; + } +} + +static const char *rpmb_result_str(enum rpmb_op_result result) +{ +#define str(x) #x +#define RPMB_ERR(_res) case RPMB_ERR_##_res: \ + { if (result & RPMB_ERR_COUNTER_EXPIRED) \ + return "COUNTER_EXPIRE:" str(_res); \ + else \ + return #_res; \ + } + + switch (result & 0x000F) { + RPMB_ERR(OK); + RPMB_ERR(GENERAL); + RPMB_ERR(AUTH); + RPMB_ERR(COUNTER); + RPMB_ERR(ADDRESS); + RPMB_ERR(WRITE); + RPMB_ERR(READ); + RPMB_ERR(NO_KEY); + break; + default: + return "unknown"; + } +#undef RPMB_ERR +}; + +static inline void __dump_buffer(const char *buf) +{ + fprintf(stderr, "%s\n", buf); +} +static void rpmb_dump_hex_buffer(const unsigned char *buf, size_t len) +{ + const size_t pbufsz = 16 * 3; + char pbuf[pbufsz]; + int j = 0; + + while (len-- > 0) { + snprintf(&pbuf[j], pbufsz - j, "%02X ", *buf++); + j += 3; + if (j == 16 * 3) { + __dump_buffer(pbuf); + j = 0; + } + } + if (j) + __dump_buffer(pbuf); +} + +static int open_dev_file(const char *devfile) +{ + int fd; + + fd = open(devfile, O_RDWR); + if (fd < 0) + rpmb_err("Cannot open: %s: %s\n", devfile, strerror(errno)); + return fd; +} + +static int open_rd_file(const char *datafile, const char *type) +{ + int fd; + + if (!strcmp(datafile, "-")) + fd = STDIN_FILENO; + else + fd = open(datafile, O_RDONLY); + + if (fd < 0) + rpmb_err("Cannot open %s: %s: %s\n", + type, datafile, strerror(errno)); + + return fd; +} + +static int open_wr_file(const char *datafile, const char *type) +{ + int fd; + + if (!strcmp(datafile, "-")) + fd = STDOUT_FILENO; + else + fd = open(datafile, O_WRONLY | O_CREAT | O_APPEND, + S_IRUSR | S_IWUSR); + if (fd < 0) + rpmb_err("Cannot open %s: %s: %s\n", + type, datafile, strerror(errno)); + return fd; +} + +static void close_fd(int fd) +{ + if (fd > 0 && fd != STDIN_FILENO && fd != STDOUT_FILENO) + close(fd); +} + +/* blocking rw wrapper */ +#define rw(func, fd, buf, size) \ +({ \ + ssize_t nread = 0, n; \ + char *_buf = (char *)buf; \ + do { \ + n = func(fd, _buf + nread, size - nread); \ + if (n == -1 && errno != EINTR) { \ + nread = -1; \ + break; \ + } else if (n > 0) { \ + nread += n; \ + } \ + } while (n != 0 && (size_t)nread != size); \ + nread; \ +}) + + +static ssize_t read_file(int fd, unsigned char *data, size_t size) +{ + ssize_t ret; + + ret = rw(read, fd, data, size); + if (ret < 0) { + rpmb_err("cannot read file: %s\n", strerror(errno)); + } else if (ret != size) { + rpmb_err("read %zd but must be %zu bytes length\n", + ret, size); + ret = -EINVAL; + } + + return ret; +} + +static ssize_t write_file(int fd, unsigned char *data, size_t size) +{ + ssize_t ret; + + ret = rw(write, fd, data, size); + if (ret < 0) { + rpmb_err("cannot read file: %s\n", strerror(errno)); + } else if (ret != size) { + rpmb_err("data is %zd but must be %zu bytes length\n", + ret, size); + ret = -EINVAL; + } + return ret; +} + +static int rpmb_calc_hmac_sha256(struct rpmb_frame *frames, size_t blocks_cnt, + const unsigned char key[], + unsigned int key_size, + unsigned char mac[], + unsigned int mac_size) +{ + HMAC_CTX ctx; + int ret; + int i; + + /* SSL returns 1 on success 0 on failure */ + + HMAC_CTX_init(&ctx); + ret = HMAC_Init_ex(&ctx, key, key_size, EVP_sha256(), NULL); + if (ret == 0) + goto out; + for (i = 0; i < blocks_cnt; i++) + HMAC_Update(&ctx, frames[i].data, hmac_data_len); + + ret = HMAC_Final(&ctx, mac, &mac_size); + if (ret == 0) + goto out; + if (mac_size != RPMB_MAC_SIZE) + ret = 0; + + ret = 1; +out: + HMAC_CTX_cleanup(&ctx); + return ret == 1 ? 0 : -1; +} + +static int rpmb_ioctl(int fd, uint16_t req, + const struct rpmb_frame *frames_in, + unsigned int in_cnt, + struct rpmb_frame *frames_out, + unsigned int out_cnt) +{ + int ret; + struct rpmb_ioc_cmd icmd; + + icmd.req = req; + icmd.in_frames_count = in_cnt; + rpmb_ioc_cmd_set_in_frames(icmd, frames_in); + rpmb_ioc_cmd_set_out_frames(icmd, frames_out); + icmd.out_frames_count = out_cnt; + + ret = ioctl(fd, RPMB_IOC_REQ, &icmd); + if (ret < 0) + rpmb_err("ioctl failure %d: %s\n", ret, strerror(errno)); + + return ret; +} + + +static int op_rpmb_program_key(int nargs, char *argv[]) +{ + int ret; + int dev_fd = -1, key_fd = -1; + uint16_t req = RPMB_PROGRAM_KEY; + struct rpmb_frame frame_in, frame_out; + + ret = -EINVAL; + if (nargs != 2) + return ret; + + dev_fd = open_dev_file(argv[0]); + if (dev_fd < 0) + goto out; + argv++; + + key_fd = open_rd_file(argv[0], "key file"); + if (key_fd < 0) + goto out; + argv++; + + memset(&frame_in, 0, sizeof(frame_in)); + frame_in.req_resp = htobe16(req); + + read_file(key_fd, frame_in.key_mac, RPMB_KEY_SIZE); + + ret = rpmb_ioctl(dev_fd, req, &frame_in, 1, &frame_out, 1); + if (ret) + goto out; + + ret = be16toh(frame_out.result); + if (ret) + rpmb_err("RPMB operation %s failed, %s[0x%04x]\n", + rpmb_op_str(req), rpmb_result_str(ret), ret); + +out: + close_fd(dev_fd); + close_fd(key_fd); + + return ret; +} + +static int rpmb_get_write_counter(int dev_fd, unsigned int *cnt, + const unsigned char *key) +{ + int ret; + uint16_t req = RPMB_GET_WRITE_COUNTER; + unsigned char mac[RPMB_MAC_SIZE]; + struct rpmb_frame frame_in; + struct rpmb_frame frame_out; + + memset(&frame_in, 0, sizeof(frame_in)); + frame_in.req_resp = htobe16(req); + RAND_bytes(frame_in.nonce, RPMB_NONCE_SIZE); + + ret = rpmb_ioctl(dev_fd, req, &frame_in, 1, &frame_out, 1); + if (ret != 0) + return ret; + + ret = be16toh(frame_out.result); + if (ret) + goto out; + + if (key) { + rpmb_calc_hmac_sha256(&frame_out, 1, + key, RPMB_KEY_SIZE, + mac, RPMB_MAC_SIZE); + if (memcmp(mac, frame_out.key_mac, RPMB_MAC_SIZE)) { + rpmb_err("RPMB hmac mismatch\n"); + rpmb_dump_hex_buffer(frame_out.key_mac, RPMB_MAC_SIZE); + rpmb_dump_hex_buffer(mac, RPMB_MAC_SIZE); + ret = RPMB_ERR_AUTH; + goto out; + } + } + + *cnt = be32toh(frame_out.write_counter); + +out: + if (ret) { + rpmb_err("RPMB operation %s failed, %s[0x%04x]\n", + rpmb_op_str(req), rpmb_result_str(ret), ret); + } + return ret; +} + +static int op_rpmb_get_write_counter(int nargs, char **argv) +{ + int ret; + int dev_fd = -1, key_fd = -1; + bool has_key; + unsigned char key[RPMB_KEY_SIZE]; + unsigned int cnt; + + if (nargs == 2) + has_key = true; + else if (nargs == 1) + has_key = false; + else + return -EINVAL; + + ret = -EINVAL; + dev_fd = open_dev_file(argv[0]); + if (dev_fd < 0) + return ret; + argv++; + + if (has_key) { + key_fd = open_rd_file(argv[0], "key file"); + if (key_fd < 0) + goto out; + argv++; + + ret = read_file(key_fd, key, RPMB_KEY_SIZE); + if (ret < 0) + goto out; + + ret = rpmb_get_write_counter(dev_fd, &cnt, key); + } else { + ret = rpmb_get_write_counter(dev_fd, &cnt, NULL); + } + + if (!ret) + printf("Counter value: 0x%08x\n", cnt); + +out: + close_fd(dev_fd); + close_fd(key_fd); + return ret; +} + +static int op_rpmb_read_blocks(int nargs, char **argv) +{ + int i, ret; + int dev_fd = -1, data_fd = -1, key_fd = -1; + uint16_t req = RPMB_READ_DATA; + uint16_t addr, blocks_cnt; + unsigned char key[RPMB_KEY_SIZE]; + unsigned char mac[RPMB_MAC_SIZE]; + unsigned long numarg; + bool has_key; + struct rpmb_frame frame_in; + struct rpmb_frame *frames_out = NULL; + struct rpmb_frame *frame_out; + + ret = -EINVAL; + if (nargs == 4) + has_key = false; + else if (nargs == 5) + has_key = true; + else + return ret; + + dev_fd = open_dev_file(argv[0]); + if (dev_fd < 0) + goto out; + argv++; + + errno = 0; + numarg = strtoul(argv[0], NULL, 0); + if (errno || numarg > USHRT_MAX) { + rpmb_err("wrong block address\n"); + goto out; + } + addr = (uint16_t)numarg; + argv++; + + errno = 0; + numarg = strtoul(argv[0], NULL, 0); + if (errno || numarg > USHRT_MAX) { + rpmb_err("wrong blocks count\n"); + goto out; + } + blocks_cnt = (uint16_t)numarg; + argv++; + + if (blocks_cnt == 0) { + rpmb_err("wrong blocks count\n"); + goto out; + } + + data_fd = open_wr_file(argv[0], "output data"); + if (data_fd < 0) + goto out; + argv++; + + if (has_key) { + key_fd = open_rd_file(argv[0], "key file"); + if (key_fd < 0) + goto out; + argv++; + + ret = read_file(key_fd, key, RPMB_KEY_SIZE); + if (ret < 0) + goto out; + } + + ret = 0; + memset(&frame_in, 0, sizeof(frame_in)); + frame_in.req_resp = htobe16(req); + frame_in.addr = htobe16(addr); + frame_in.block_count = htobe16(blocks_cnt); + if (has_key) + RAND_bytes(frame_in.nonce, RPMB_NONCE_SIZE); + + frames_out = calloc(blocks_cnt, sizeof(struct rpmb_frame)); + if (!frames_out) { + rpmb_err("Cannot allocate %d RPMB frames\n", blocks_cnt); + ret = -ENOMEM; + goto out; + } + + ret = rpmb_ioctl(dev_fd, req, &frame_in, 1, frames_out, blocks_cnt); + if (ret) + goto out; + + frame_out = &frames_out[blocks_cnt - 1]; + ret = be16toh(frame_out->result); + if (ret) { + rpmb_err("RPMB operation %s failed, %s[0x%04x]\n", + rpmb_op_str(req), rpmb_result_str(ret), ret); + goto out; + } + + if (has_key) { + rpmb_calc_hmac_sha256(frames_out, blocks_cnt, + key, RPMB_KEY_SIZE, + mac, RPMB_MAC_SIZE); + if (memcmp(mac, frame_out->key_mac, RPMB_MAC_SIZE)) { + rpmb_err("RPMB hmac mismatch\n"); + rpmb_dump_hex_buffer(frame_out->key_mac, RPMB_MAC_SIZE); + rpmb_dump_hex_buffer(mac, RPMB_MAC_SIZE); + ret = RPMB_ERR_AUTH; + goto out; + } + } + + for (i = 0; i < blocks_cnt; i++) { + ret = write_file(data_fd, + frames_out[i].data, sizeof(frames_out[i].data)); + if (ret < 0) + goto out; + } + +out: + free(frames_out); + close_fd(dev_fd); + close_fd(data_fd); + close_fd(key_fd); + + return ret; +} + +static int op_rpmb_write_blocks(int nargs, char **argv) +{ + int ret; + int dev_fd = -1, key_fd = -1, data_fd = -1; + int i; + uint16_t req = RPMB_WRITE_DATA; + unsigned char key[RPMB_KEY_SIZE]; + unsigned char mac[RPMB_MAC_SIZE]; + unsigned long numarg; + uint16_t addr, blocks_cnt; + unsigned int cnt; + struct rpmb_frame *frames_in; + struct rpmb_frame frame_out; + + ret = -EINVAL; + if (nargs != 5) + goto out; + + dev_fd = open_dev_file(argv[0]); + if (dev_fd < 0) + goto out; + argv++; + + errno = 0; + numarg = strtoul(argv[0], NULL, 0); + if (errno || numarg > USHRT_MAX) { + rpmb_err("wrong block address %s\n", argv[0]); + goto out; + } + addr = (uint16_t)numarg; + argv++; + + errno = 0; + numarg = strtoul(argv[0], NULL, 0); + if (errno || numarg > USHRT_MAX) { + rpmb_err("wrong blocks count\n"); + goto out; + } + blocks_cnt = (uint16_t)numarg; + argv++; + + if (blocks_cnt == 0) { + rpmb_err("wrong blocks count\n"); + goto out; + } + + data_fd = open_rd_file(argv[0], "data file"); + if (data_fd < 0) + goto out; + argv++; + + key_fd = open_rd_file(argv[0], "key file"); + if (key_fd < 0) + goto out; + argv++; + + ret = read_file(key_fd, key, RPMB_KEY_SIZE); + if (ret < 0) + goto out; + + frames_in = calloc(blocks_cnt, sizeof(struct rpmb_frame)); + if (!frames_in) { + rpmb_err("can't allocate memory for RPMB outer frames\n"); + exit(EXIT_FAILURE); + } + + ret = rpmb_get_write_counter(dev_fd, &cnt, key); + if (ret) + goto out; + + for (i = 0; i < blocks_cnt; i++) { + frames_in[i].req_resp = htobe16(req); + frames_in[i].block_count = htobe16(blocks_cnt); + frames_in[i].addr = htobe16(addr); + frames_in[i].write_counter = htobe32(cnt); + } + + for (i = 0; i < blocks_cnt; i++) { + ret = read_file(data_fd, frames_in[i].data, + sizeof(frames_in[0].data)); + if (ret < 0) + goto out; + } + + rpmb_calc_hmac_sha256(frames_in, blocks_cnt, + key, RPMB_KEY_SIZE, + mac, RPMB_MAC_SIZE); + memcpy(frames_in[blocks_cnt - 1].key_mac, mac, RPMB_MAC_SIZE); + ret = rpmb_ioctl(dev_fd, req, frames_in, blocks_cnt, &frame_out, 1); + if (ret != 0) + goto out; + + ret = be16toh(frame_out.result); + if (ret) { + rpmb_err("RPMB operation %s failed, %s[0x%04x]\n", + rpmb_op_str(req), rpmb_result_str(ret), ret); + } +out: + close_fd(dev_fd); + close_fd(data_fd); + close_fd(key_fd); + return ret; +} + +typedef int (*rpmb_op)(int argc, char *argv[]); + +struct rpmb_cmd { + const char *op_name; + rpmb_op op; + const char *usage; /* usage title */ + const char *help; /* help */ +}; + + +static const struct rpmb_cmd cmds[] = { + { + "program-key", + op_rpmb_program_key, + "<RPMB_DEVICE> <KEY_FILE>", + " Program authentication key of 32 bytes length from the KEY_FILE\n" + " when KEY_FILE is -, read standard input.\n" + " NOTE: This is a one-time programmable irreversible change.\n", + }, + { + "write-counter", + op_rpmb_get_write_counter, + "<RPMB_DEVICE> [KEY_FILE]", + " Rertrive write counter value from the <RPMB_DEVICE> to stdout.\n" + " When KEY_FILE is present data is verified via HMAC\n" + " when KEY_FILE is -, read standard input.\n" + }, + { + "write-blocks", + op_rpmb_write_blocks, + "<RPMB_DEVICE> <address> <block_count> <DATA_FILE> <KEY_FILE>", + " <block count> of 256 bytes will be written from the DATA_FILE\n" + " to the <RPMB_DEVICE> at block offset <address>.\n" + " When DATA_FILE is -, read from standard input.\n", + }, + { + "read-blocks", + op_rpmb_read_blocks, + "<RPMB_DEVICE> <address> <blocks count> <OUTPUT_FILE> [KEY_FILE]", + " <block count> of 256 bytes will be read from <RPMB_DEVICE>\n" + " to the OUTPUT_FILE\n" + " When KEY_FILE is present data is verified via HMAC\n" + " When OUTPUT/KEY_FILE is -, read from standard input.\n" + " When OUTPUT_FILE is -, write to standard output\n", + }, + + { NULL, NULL, NULL, NULL } +}; + +static void help(const char *prog, const struct rpmb_cmd *cmd) +{ + printf("%s %s %s\n", prog, cmd->op_name, cmd->usage); + printf("%s\n", cmd->help); +} + +static void usage(const char *prog) +{ + int i; + + printf("\n"); + printf("Usage: %s <command> <args>\n\n", prog); + for (i = 0; cmds[i].op_name; i++) + printf(" %s %s %s\n", + prog, cmds[i].op_name, cmds[i].usage); + + printf("\n"); + printf(" %s help : shows this help\n", prog); + printf(" %s help <command>: shows detailed help\n", prog); +} + +static bool call_for_help(const char *arg) +{ + return !strcmp(arg, "help") || + !strcmp(arg, "-h") || + !strcmp(arg, "--help"); +} + +static const +struct rpmb_cmd *parse_args(const char *prog, int *_argc, char **_argv[]) +{ + + int i; + int argc = *_argc; + char **argv = *_argv; + const struct rpmb_cmd *cmd = NULL; + bool need_help = false; + + argc--; argv++; + + if (argc == 0) + goto out; + + if (call_for_help(argv[0])) { + argc--; argv++; + if (argc == 0) + goto out; + else + need_help = true; + } + + for (i = 0; cmds[i].op_name; i++) { + if (!strncmp(argv[0], cmds[i].op_name, + strlen(cmds[i].op_name))) { + cmd = &cmds[i]; + argc--; argv++; + break; + } + } + + if (!cmd) + goto out; + + if (need_help || (argc > 0 && call_for_help(argv[0]))) { + help(prog, cmd); + argc--; argv++; + return NULL; + } + +out: + *_argc = argc; + *_argv = argv; + + if (!cmd) + usage(prog); + + return cmd; +} + +int main(int argc, char *argv[]) +{ + const char *prog = basename(argv[0]); + const struct rpmb_cmd *cmd; + int ret; + + cmd = parse_args(prog, &argc, &argv); + if (!cmd) + exit(EXIT_SUCCESS); + + ret = cmd->op(argc, argv); + if (ret == -EINVAL) + help(prog, cmd); + + if (ret) + exit(EXIT_FAILURE); + + exit(EXIT_SUCCESS); +} -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
