diff options
Diffstat (limited to 'util')
| -rw-r--r-- | util/ectool.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/util/ectool.c b/util/ectool.c index b77215bdb8..59feee5f39 100644 --- a/util/ectool.c +++ b/util/ectool.c @@ -242,6 +242,8 @@ const char help_str[] = " Set keyboard backlight in percent\n" " pwmsetduty\n" " Set 16 bit duty cycle of given PWM\n" + " rand <num_bytes>\n" + " generate <num_bytes> of random numbers\n" " readtest <patternoffset> <size>\n" " Reads a pattern from the EC via LPC\n" " reboot_ec <RO|RW|cold|hibernate|hibernate-clear-ap-off|disable-jump>" @@ -1112,6 +1114,53 @@ int cmd_flash_info(int argc, char *argv[]) return 0; } +int cmd_rand(int argc, char *argv[]) +{ + struct ec_params_rand_num p; + struct ec_response_rand_num *r; + size_t r_size; + int64_t num_bytes; + int64_t i; + char *e; + int rv = 0; + + if (argc < 2) { + fprintf(stderr, "Usage: %s <num_bytes>\n", argv[0]); + return -1; + } + + num_bytes = strtol(argv[1], &e, 0); + if ((e && *e) || (errno == ERANGE)) { + fprintf(stderr, "Invalid num_bytes argument\n"); + return -1; + } + + r = ec_inbuf; + + for (i = 0; i < num_bytes; i += ec_max_insize) { + p.num_rand_bytes = ec_max_insize; + if (num_bytes - i < p.num_rand_bytes) + p.num_rand_bytes = num_bytes - i; + + r_size = p.num_rand_bytes; + + rv = ec_command(EC_CMD_RAND_NUM, EC_VER_RAND_NUM, &p, sizeof(p), + r, r_size); + if (rv < 0) { + fprintf(stderr, "Random number command failed\n"); + return -1; + } + + rv = write(STDOUT_FILENO, r->rand, r_size); + if (rv != r_size) { + fprintf(stderr, "Failed to write stdout\n"); + return -1; + } + } + + return 0; +} + int cmd_flash_spi_info(int argc, char *argv[]) { struct ec_response_flash_spi_info r; @@ -9000,6 +9049,7 @@ const struct command commands[] = { {"pwmsetfanrpm", cmd_pwm_set_fan_rpm}, {"pwmsetkblight", cmd_pwm_set_keyboard_backlight}, {"pwmsetduty", cmd_pwm_set_duty}, + {"rand", cmd_rand}, {"readtest", cmd_read_test}, {"reboot_ec", cmd_reboot_ec}, {"rollbackinfo", cmd_rollback_info}, |