diff options
Diffstat (limited to 'util/nvmutil/nvmutil.c')
| -rw-r--r-- | util/nvmutil/nvmutil.c | 295 |
1 files changed, 147 insertions, 148 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c index 8d9dec4e..d2bc0aa5 100644 --- a/util/nvmutil/nvmutil.c +++ b/util/nvmutil/nvmutil.c @@ -25,8 +25,8 @@ #if defined(__OpenBSD__) || defined(__FreeBSD__) || \ defined(__NetBSD__) || defined(__APPLE__) || \ defined(__DragonFly__) -#ifndef HAVE_ARC4RANDOM_BUF -#define HAVE_ARC4RANDOM_BUF 1 +#ifndef NVMUTIL_ARC4RANDOM_BUF +#define NVMUTIL_ARC4RANDOM_BUF 1 #endif #endif @@ -57,20 +57,23 @@ static void check_enum_bin(size_t a, const char *a_name, static void set_cmd(int argc, char *argv[]); static void set_cmd_args(int argc, char *argv[]); static size_t conv_argv_part_num(const char *part_str); +static void set_io_flags(int argc, char *argv[]); static void run_cmd(size_t c); static void check_command_num(size_t c); static uint8_t valid_command(size_t c); -static void set_io_flags(int argc, char *argv[]); -static void open_gbe_file(void); -#ifndef HAVE_ARC4RANDOM_BUF +static int xstrxcmp(const char *a, const char *b, size_t maxlen); +#ifndef NVMUTIL_ARC4RANDOM_BUF static void open_dev_urandom(void); #endif +static void open_gbe_file(void); static void xopen(int *fd, const char *path, int flags, struct stat *st); static void read_gbe_file(void); static void read_gbe_file_part(size_t part); static void read_checksums(void); +static int good_checksum(size_t partnum); static void cmd_setmac(void); static void parse_mac_string(void); +static size_t xstrxlen(const char *scmp, size_t maxlen); static void set_mac_byte(size_t mac_byte_pos); static void set_mac_nib(size_t mac_str_pos, size_t mac_byte_pos, size_t mac_nib_pos); @@ -83,7 +86,6 @@ static void cmd_dump(void); static void print_mac_from_nvm(size_t partnum); static void hexdump(size_t partnum); static void cmd_brick(void); -static int good_checksum(size_t partnum); static void write_gbe_file(void); static void override_part_modified(void); static void set_checksum(size_t part); @@ -97,13 +99,11 @@ static off_t gbe_file_offset(size_t part, const char *f_op); static void *gbe_mem_offset(size_t part, const char *f_op); static off_t gbe_x_offset(size_t part, const char *f_op, const char *d_type, off_t nsize, off_t ncmp); -static void usage(uint8_t usage_exit); -static size_t xstrxlen(const char *scmp, size_t maxlen); -static int xstrxcmp(const char *a, const char *b, size_t maxlen); static void err(int nvm_errval, const char *msg, ...); +static void close_files(void); static const char *getnvmprogname(void); static void set_err(int errval); -static void close_files(void); +static void usage(uint8_t usage_exit); /* * Sizes in bytes: @@ -145,7 +145,7 @@ static void close_files(void); */ #define items(x) (sizeof((x)) / sizeof((x)[0])) -#ifndef HAVE_ARC4RANDOM_BUF +#ifndef NVMUTIL_ARC4RANDOM_BUF static const char newrandom[] = "/dev/urandom"; static const char oldrandom[] = "/dev/random"; /* fallback on OLD unix */ static const char *rname = NULL; @@ -166,7 +166,7 @@ static uint16_t mac_buf[3]; static off_t gbe_file_size; static int gbe_flags; -#ifndef HAVE_ARC4RANDOM_BUF +#ifndef NVMUTIL_ARC4RANDOM_BUF static int urandom_fd = -1; #endif static int gbe_fd = -1; @@ -252,7 +252,7 @@ static const struct commands command[] = { { CMD_DUMP, "dump", cmd_dump, ARGC_3, NO_INVERT, SET_MOD_OFF, ARG_NOPART, - SKIP_CHECKSUM_READ, SKIP_CHECKSUM_WRITE, + CHECKSUM_READ, SKIP_CHECKSUM_WRITE, NVM_SIZE }, { CMD_SETMAC, "setmac", cmd_setmac, ARGC_3, @@ -360,7 +360,7 @@ main(int argc, char *argv[]) #endif #endif -#ifndef HAVE_ARC4RANDOM_BUF +#ifndef NVMUTIL_ARC4RANDOM_BUF #if defined(__OpenBSD__) || defined(__FreeBSD__) || \ defined(__NetBSD__) || defined(__APPLE__) || \ defined(__DragonFly__) @@ -414,8 +414,13 @@ sanitize_command_index(size_t c) check_command_num(c); - if (command[c].argc < 2) - err(ECANCELED, "cmd index %zu: argc below 2, %d", + if (ARGC_3 != 3) + err(ECANCELED, "ARGC_3 is not equal to 3"); + if (ARGC_4 != 4) + err(ECANCELED, "ARGC_4 is not equal to 4"); + + if (command[c].argc < 3) + err(ECANCELED, "cmd index %zu: argc below 3, %d", c, command[c].argc); if (command[c].str == NULL) @@ -560,6 +565,18 @@ conv_argv_part_num(const char *part_str) } static void +set_io_flags(int argc, char *argv[]) +{ + gbe_flags = O_RDWR; + + if (argc < 3) + return; + + if (xstrxcmp(argv[2], "dump", MAX_CMD_LEN) == 0) + gbe_flags = O_RDONLY; +} + +static void run_cmd(size_t c) { check_command_num(c); @@ -587,19 +604,42 @@ valid_command(size_t c) return 1; } -static void -set_io_flags(int argc, char *argv[]) +/* + * Portable strcmp() but blocks NULL/empty/unterminated + * strings. Even stricter than strncmp(). + */ +static int +xstrxcmp(const char *a, const char *b, size_t maxlen) { - gbe_flags = O_RDWR; + size_t i; - if (argc < 3) - return; + if (a == NULL || b == NULL) + err(EINVAL, "NULL input to xstrxcmp"); - if (xstrxcmp(argv[2], "dump", MAX_CMD_LEN) == 0) - gbe_flags = O_RDONLY; + if (*a == '\0' || *b == '\0') + err(EINVAL, "Empty string in xstrxcmp"); + + for (i = 0; i < maxlen; i++) { + if (a[i] != b[i]) + return (unsigned char)a[i] - (unsigned char)b[i]; + + if (a[i] == '\0') + return 0; + } + + /* + * We reached maxlen, so assume unterminated string. + */ + err(EINVAL, "Unterminated string in xstrxcmp"); + + /* + * Should never reach here. This keeps compilers happy. + */ + errno = EINVAL; + return -1; } -#ifndef HAVE_ARC4RANDOM_BUF +#ifndef NVMUTIL_ARC4RANDOM_BUF static void open_dev_urandom(void) { @@ -734,12 +774,31 @@ read_checksums(void) fname); } +static int +good_checksum(size_t partnum) +{ + size_t w; + uint16_t total = 0; + + for (w = 0; w <= NVM_CHECKSUM_WORD; w++) + total += nvm_word(w, partnum); + + if (total == NVM_CHECKSUM) + return 1; + + fprintf(stderr, "WARNING: BAD checksum in part %zu\n", + partnum ^ command[cmd_index].invert); + + set_err(ECANCELED); + return 0; +} + static void cmd_setmac(void) { size_t partnum; - #ifdef HAVE_ARC4RANDOM_BUF + #ifdef NVMUTIL_ARC4RANDOM_BUF printf("Randomisation method: arc4random_buf\n"); #else printf("Randomisation method: %s\n", rname); @@ -772,6 +831,33 @@ parse_mac_string(void) err(EINVAL, "Must not specify multicast MAC address"); } +/* + * strnlen() but aborts on NULL input, and empty strings. + * Our version also prohibits unterminated strings. + * strnlen() was standardized in POSIX.1-2008 and is not + * available on some older systems, so we provide our own. + */ +static size_t +xstrxlen(const char *scmp, size_t maxlen) +{ + size_t xstr_index; + + if (scmp == NULL) + err(EINVAL, "NULL input to xstrxlen"); + + if (*scmp == '\0') + err(EINVAL, "Empty string in xstrxlen"); + + for (xstr_index = 0; + xstr_index < maxlen && scmp[xstr_index] != '\0'; + xstr_index++); + + if (xstr_index == maxlen) + err(EINVAL, "Unterminated string in xstrxlen"); + + return xstr_index; +} + static void set_mac_byte(size_t mac_byte_pos) { @@ -846,7 +932,7 @@ rhex(void) if (!n) { n = sizeof(rnum); -#ifdef HAVE_ARC4RANDOM_BUF +#ifdef NVMUTIL_ARC4RANDOM_BUF arc4random_buf(rnum, n); #else read_file_exact(urandom_fd, rnum, n, 0, rname, NULL); @@ -912,19 +998,13 @@ static void cmd_dump(void) { size_t partnum; - int num_invalid = 0; for (partnum = 0; partnum < 2; partnum++) { - if (!good_checksum(partnum)) - ++num_invalid; printf("MAC (part %zu): ", partnum); print_mac_from_nvm(partnum); hexdump(partnum); } - - if (num_invalid < 2) - errno = 0; } static void @@ -968,25 +1048,6 @@ cmd_brick(void) set_nvm_word(NVM_CHECKSUM_WORD, part, checksum_word ^ 1); } -static int -good_checksum(size_t partnum) -{ - size_t w; - uint16_t total = 0; - - for (w = 0; w <= NVM_CHECKSUM_WORD; w++) - total += nvm_word(w, partnum); - - if (total == NVM_CHECKSUM) - return 1; - - fprintf(stderr, "WARNING: BAD checksum in part %zu\n", - partnum ^ command[cmd_index].invert); - - set_err(ECANCELED); - return 0; -} - static void write_gbe_file(void) { @@ -1208,93 +1269,6 @@ gbe_x_offset(size_t p, const char *f_op, const char *d_type, } static void -usage(uint8_t usage_exit) -{ - const char *util = getnvmprogname(); - -#ifdef NVMUTIL_PLEDGE - if (pledge("stdio", NULL) == -1) - err(ECANCELED, "pledge"); -#endif - fprintf(stderr, - "Modify Intel GbE NVM images e.g. set MAC\n" - "USAGE:\n" - "\t%s FILE dump\n" - "\t%s FILE # same as setmac without [MAC]\n" - "\t%s FILE setmac [MAC]\n" - "\t%s FILE swap\n" - "\t%s FILE copy 0|1\n" - "\t%s FILE brick 0|1\n" - "\t%s FILE setchecksum 0|1\n", - util, util, util, util, util, util, util); - - if (usage_exit) - err(ECANCELED, "Too few arguments"); -} - -/* - * strnlen() but aborts on NULL input, and empty strings. - * Our version also prohibits unterminated strings. - * strnlen() was standardized in POSIX.1-2008 and is not - * available on some older systems, so we provide our own. - */ -static size_t -xstrxlen(const char *scmp, size_t maxlen) -{ - size_t xstr_index; - - if (scmp == NULL) - err(EINVAL, "NULL input to xstrxlen"); - - if (*scmp == '\0') - err(EINVAL, "Empty string in xstrxlen"); - - for (xstr_index = 0; - xstr_index < maxlen && scmp[xstr_index] != '\0'; - xstr_index++); - - if (xstr_index == maxlen) - err(EINVAL, "Unterminated string in xstrxlen"); - - return xstr_index; -} - -/* - * Portable, secure strcmp() with the same mentality - * as our xstrxlen - */ -static int -xstrxcmp(const char *a, const char *b, size_t maxlen) -{ - size_t i; - - if (a == NULL || b == NULL) - err(EINVAL, "NULL input to xstrxcmp"); - - if (*a == '\0' || *b == '\0') - err(EINVAL, "Empty string in xstrxcmp"); - - for (i = 0; i < maxlen; i++) { - if (a[i] != b[i]) - return (unsigned char)a[i] - (unsigned char)b[i]; - - if (a[i] == '\0') - return 0; - } - - /* - * We reached maxlen, so assume unterminated string. - */ - err(EINVAL, "Unterminated string in xstrxcmp"); - - /* - * Should never reach here. This keeps compilers happy. - */ - errno = EINVAL; - return -1; -} - -static void err(int nvm_errval, const char *msg, ...) { if (nvm_errval != -1) @@ -1315,6 +1289,22 @@ err(int nvm_errval, const char *msg, ...) exit(EXIT_FAILURE); } +static void +close_files(void) +{ + if (gbe_fd > -1) { + if (close(gbe_fd) == -1) + err(-1, "close '%s'", fname); + } + +#ifndef NVMUTIL_ARC4RANDOM_BUF + if (urandom_fd > -1) { + if (close(urandom_fd) == -1) + err(-1, "close '%s'", rname); + } +#endif +} + static const char * getnvmprogname(void) { @@ -1343,17 +1333,26 @@ set_err(int x) } static void -close_files(void) +usage(uint8_t usage_exit) { - if (gbe_fd > -1) { - if (close(gbe_fd) == -1) - err(-1, "close '%s'", fname); - } + const char *util = getnvmprogname(); -#ifndef HAVE_ARC4RANDOM_BUF - if (urandom_fd > -1) { - if (close(urandom_fd) == -1) - err(-1, "close '%s'", rname); - } +#ifdef NVMUTIL_PLEDGE + if (pledge("stdio", NULL) == -1) + err(ECANCELED, "pledge"); #endif + fprintf(stderr, + "Modify Intel GbE NVM images e.g. set MAC\n" + "USAGE:\n" + "\t%s FILE dump\n" + "\t%s FILE # same as setmac without [MAC]\n" + "\t%s FILE setmac [MAC]\n" + "\t%s FILE swap\n" + "\t%s FILE copy 0|1\n" + "\t%s FILE brick 0|1\n" + "\t%s FILE setchecksum 0|1\n", + util, util, util, util, util, util, util); + + if (usage_exit) + err(ECANCELED, "Too few arguments"); } |