diff options
Diffstat (limited to 'toys/lsb/md5sum.c')
| -rw-r--r-- | toys/lsb/md5sum.c | 97 |
1 files changed, 88 insertions, 9 deletions
diff --git a/toys/lsb/md5sum.c b/toys/lsb/md5sum.c index 12f04503..be9932a8 100644 --- a/toys/lsb/md5sum.c +++ b/toys/lsb/md5sum.c @@ -8,38 +8,45 @@ * They're combined this way to share infrastructure, and because md5sum is * and LSB standard command, sha1sum is just a good idea. -USE_MD5SUM(NEWTOY(md5sum, "b", TOYFLAG_USR|TOYFLAG_BIN)) -USE_SHA1SUM(NEWTOY(sha1sum, "b", TOYFLAG_USR|TOYFLAG_BIN)) +USE_MD5SUM(NEWTOY(md5sum, "bc*[!bc]", TOYFLAG_USR|TOYFLAG_BIN)) +USE_SHA1SUM(NEWTOY(sha1sum, "bc*[!bc]", TOYFLAG_USR|TOYFLAG_BIN)) config MD5SUM bool "md5sum" default y help - usage: md5sum [FILE]... + usage: md5sum [-b] [-c FILE] [FILE]... Calculate md5 hash for each input file, reading from stdin if none. Output one hash (16 hex digits) for each input file, followed by filename. -b brief (hash only, no filename) + -c Check each line of FILE is the same hash+filename we'd output. config SHA1SUM bool "sha1sum" default y help - usage: sha1sum [FILE]... + usage: sha1sum [-b] [-c FILE] [FILE]... calculate sha1 hash for each input file, reading from stdin if none. Output one hash (20 hex digits) for each input file, followed by filename. -b brief (hash only, no filename) + -c Check each line of FILE is the same hash+filename we'd output. */ #define FOR_md5sum #include "toys.h" GLOBALS( + struct arg_list *c; + + int sawline; + + // Crypto variables blanked after summing unsigned state[5]; unsigned oldstate[5]; uint64_t count; @@ -228,18 +235,90 @@ static void do_hash(int fd, char *name) if (sha1) for (i = 0; i < 20; i++) - printf("%02x", 255&(TT.state[i>>2] >> ((3-(i & 3)) * 8))); - else for (i=0; i<4; i++) printf("%08x", bswap_32(TT.state[i])); + sprintf(toybuf+2*i, "%02x", 255&(TT.state[i>>2] >> ((3-(i & 3)) * 8))); + else for (i=0; i<4; i++) sprintf(toybuf+8*i, "%08x", bswap_32(TT.state[i])); + + if (name) + printf((toys.optflags & FLAG_b) ? "%s\n" : "%s %s\n", toybuf, name); // Wipe variables. Cryptographer paranoia. - memset(&TT, 0, sizeof(TT)); + memset(TT.state, 0, sizeof(TT)-((long)TT.state-(long)&TT)); + i = strlen(toybuf)+1; + memset(toybuf+i, 0, sizeof(toybuf)-i); +} + +static int do_c(char *line, size_t len) +{ + int space = 0, fail = 0; + char *name; + + for (name = line; *name; name++) { + if (isspace(*name)) { + space++; + *name = 0; + } else if (space) break; + } + + if (!space || !*line || !*name) error_msg("bad line %s", line); + else { + int fd = !strcmp(name, "-") ? 0 : open(name, O_RDONLY); + + TT.sawline = 1; + if (fd==-1) { + perror_msg_raw(name); + *toybuf = 0; + } else do_hash(fd, 0); + if (strcasecmp(line, toybuf)) toys.exitval = fail = 1; + printf("%s: %s\n", name, fail ? "FAILED" : "OK"); + if (fd>0) close(fd); + } + + return 0; +} - printf((toys.optflags & FLAG_b) ? "\n" : " %s\n", name); +// Open file, read each line, and call do_line(). Returns 0 if file existed +// and we read it to the end, 1 if interrupted by callback, 2 of didn't exist +// do_line returns 0 to free line, 1 to keep line, 2 to end loop +int looplines(char *name, int trim, int (*do_line)(char *line, size_t len)) +{ + FILE *fp = !strcmp(name, "-") ? stdin : fopen(name, "r"); + int rc = 0; + + if (!fp) { + perror_msg_raw(name); + + return 2; + } + + for (;;) { + char *line = 0; + ssize_t len; + + if ((len = getline(&line, (void *)&len, fp))<1) break; + if (line[len-1]=='\n') len--; + if (trim) line[len] = 0; + len = do_line(line, len); + if (!len) free(line); + if (len==2) { + rc = 2; + break; + } + } + if (fp!=stdin) fclose(fp); + + return rc; } void md5sum_main(void) { - loopfiles(toys.optargs, do_hash); + struct arg_list *al; + + if (!TT.c) loopfiles(toys.optargs, do_hash); + else for (al = TT.c; al; al = al->next) { + TT.sawline = 0; + looplines(al->arg, 1, do_c); + if (!TT.sawline) error_msg("%s: no lines", al->arg); + } } void sha1sum_main(void) |