--- /dev/null
+/* -*-c-*-
+ *
+ * $Id: hashsum.c,v 1.1 2000/07/15 20:52:34 mdw Exp $
+ *
+ * Hash files using some secure hash function
+ *
+ * (c) 2000 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: hashsum.c,v $
+ * Revision 1.1 2000/07/15 20:52:34 mdw
+ * Useful replacement for `md5sum' with support for many different hash
+ * functions and for reading filename lists from `find'.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include "config.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <mLib/alloc.h>
+#include <mLib/dstr.h>
+#include <mLib/mdwopt.h>
+#include <mLib/quis.h>
+#include <mLib/report.h>
+#include <mLib/sub.h>
+#include <mLib/str.h>
+
+#include "ghash.h"
+
+#include "md4.h"
+#include "md5.h"
+#include "rmd128.h"
+#include "rmd160.h"
+#include "rmd256.h"
+#include "rmd320.h"
+#include "sha.h"
+#include "tiger.h"
+
+/*----- Static variables --------------------------------------------------*/
+
+static const gchash *hashtab[] = {
+ &md5, &md4, &sha, &rmd128, &rmd160, &rmd256, &rmd320, &tiger,
+ 0
+};
+
+enum {
+ f_binary = 1,
+ f_bogus = 2,
+ f_verbose = 4,
+ f_check = 8,
+ f_files = 16,
+ f_raw = 32,
+ f_oddhash = 64,
+ f_escape = 128
+};
+
+/*----- Support functions -------------------------------------------------*/
+
+/* --- @fhash@ --- *
+ *
+ * Arguments: @const char *file@ = file name to be hashed (null for stdin)
+ * @unsigned f@ = flags to set
+ * @const gchash *gch@ = pointer to hash function to use
+ * @void *buf@ = pointer to hash output buffer
+ *
+ * Returns: Zero if it worked, nonzero on error.
+ *
+ * Use: Hashes a file.
+ */
+
+static int fhash(const char *file, unsigned f, const gchash *gch, void *buf)
+{
+ FILE *fp;
+ char fbuf[BUFSIZ];
+ size_t sz;
+ ghash *h;
+ int e;
+
+ if (!file)
+ fp = stdin;
+ else if ((fp = fopen(file, f & f_binary ? "rb" : "r")) == 0)
+ return (-1);
+
+ h = gch->init();
+ while ((sz = fread(fbuf, 1, sizeof(fbuf), fp)) > 0)
+ h->ops->hash(h, fbuf, sz);
+ h->ops->done(h, buf);
+ h->ops->destroy(h);
+ e = ferror(fp);
+ if (file)
+ fclose(fp);
+ return (e ? -1 : 0);
+}
+
+/* --- @puthex@ --- *
+ *
+ * Arguments: @const octet *buf@ = pointer to a binary buffer
+ * @size_t sz@ = size of the buffer
+ * @FILE *fp@ = pointer to output file handle
+ *
+ * Returns: ---
+ *
+ * Use: Writes a hex dump of a block of memory.
+ */
+
+static void puthex(const octet *buf, size_t sz, FILE *fp)
+{
+ while (sz) {
+ fprintf(fp, "%02x", *buf++);
+ sz--;
+ }
+}
+
+/* --- @gethex@ --- *
+ *
+ * Arguments: @const char *p@ = pointer to input string
+ * @octet *q@ = pointer to output buffer
+ * @size_t sz@ = size of the output buffer
+ * @char **pp@ = where to put the end pointer
+ *
+ * Returns: The number of bytes written to the buffer.
+ *
+ * Use: Reads hex dumps from the input string.
+ */
+
+static size_t gethex(const char *p, octet *q, size_t sz, char **pp)
+{
+ size_t i = 0;
+ while (sz > 0 &&
+ isxdigit((unsigned char)p[0]) &&
+ isxdigit((unsigned char)p[1])) {
+ char buf[3];
+ buf[0] = p[0];
+ buf[1] = p[1];
+ buf[2] = 0;
+ *q++ = strtoul(buf, 0, 16);
+ sz--;
+ p += 2;
+ i++;
+ }
+ if (pp)
+ *pp = (char *)p;
+ return (i);
+}
+
+/* --- @gethash@ --- *
+ *
+ * Arguments: @const char *name@ = pointer to name string
+ *
+ * Returns: Pointer to appropriate hash class.
+ *
+ * Use: Chooses a hash function by name.
+ */
+
+static const gchash *gethash(const char *name)
+{
+ const gchash **g, *gg = 0;
+ size_t sz = strlen(name);
+ for (g = hashtab; *g; g++) {
+ if (strncmp(name, (*g)->name, sz) == 0) {
+ if ((*g)->name[sz] == 0) {
+ gg = *g;
+ break;
+ } else if (gg)
+ return (0);
+ else
+ gg = *g;
+ }
+ }
+ return (gg);
+}
+
+/* --- @getstring@ --- *
+ *
+ * Arguments: @FILE *fp@ = stream from which to read
+ * @const char *p@ = string to read from instead
+ * @dstr *d@ = destination string
+ * @unsigned raw@ = raw or cooked read
+ *
+ * Returns: Zero if OK, nonzero on end-of-file.
+ *
+ * Use: Reads a filename (or something similar) from a stream.
+ */
+
+static int getstring(FILE *fp, const char *p, dstr *d, unsigned raw)
+{
+ int ch;
+ int q = 0;
+
+ /* --- Raw: just read exactly what's written up to a null byte --- */
+
+#define NEXTCH (fp ? getc(fp) : *p++)
+#define EOFCH (fp ? EOF : 0)
+
+ if (raw) {
+ if ((ch = NEXTCH) == EOFCH)
+ return (EOF);
+ for (;;) {
+ if (!ch)
+ break;
+ DPUTC(d, ch);
+ if ((ch = NEXTCH) == EOFCH)
+ break;
+ }
+ DPUTZ(d);
+ return (0);
+ }
+
+ /* --- Skip as far as whitespace --- *
+ *
+ * Also skip past comments.
+ */
+
+again:
+ ch = NEXTCH;
+ while (isspace((unsigned char)ch))
+ ch = NEXTCH;
+ if (ch == '#') {
+ do ch = NEXTCH; while (ch != '\n' && ch != EOFCH);
+ goto again;
+ }
+ if (ch == EOFCH)
+ return (EOF);
+
+ /* --- If the character is a quote then read a quoted string --- */
+
+ switch (ch) {
+ case '`':
+ ch = '\'';
+ case '\'':
+ case '\"':
+ q = ch;
+ ch = NEXTCH;
+ break;
+ }
+
+ /* --- Now read all sorts of interesting things --- */
+
+ for (;;) {
+
+ /* --- Handle an escaped thing --- */
+
+ if (ch == '\\') {
+ ch = NEXTCH;
+ if (ch == EOFCH)
+ break;
+ switch (ch) {
+ case 'a': ch = '\a'; break;
+ case 'b': ch = '\b'; break;
+ case 'f': ch = '\f'; break;
+ case 'n': ch = '\n'; break;
+ case 'r': ch = '\r'; break;
+ case 't': ch = '\t'; break;
+ case 'v': ch = '\v'; break;
+ }
+ DPUTC(d, ch);
+ ch = NEXTCH;
+ continue;
+ }
+
+ /* --- If it's a quote or some other end marker then stop --- */
+
+ if (ch == q)
+ break;
+ if (!q && isspace((unsigned char)ch))
+ break;
+
+ /* --- Otherwise contribute and continue --- */
+
+ DPUTC(d, ch);
+ if ((ch = NEXTCH) == EOFCH)
+ break;
+ }
+
+ /* --- Done --- */
+
+ DPUTZ(d);
+ return (0);
+
+#undef NEXTCH
+#undef EOFCH
+}
+
+/* --- @putstring@ --- *
+ *
+ * Arguments: @FILE *fp@ = stream to write on
+ * @const char *p@ = pointer to text
+ * @unsigned raw@ = whether the string is to be written raw
+ *
+ * Returns: ---
+ *
+ * Use: Emits a string to a stream.
+ */
+
+static void putstring(FILE *fp, const char *p, unsigned raw)
+{
+ size_t sz = strlen(p);
+ unsigned qq;
+ const char *q;
+
+ /* --- Just write the string null terminated if raw --- */
+
+ if (raw) {
+ fwrite(p, 1, sz + 1, fp);
+ return;
+ }
+
+ /* --- Check for any dodgy characters --- */
+
+ qq = 0;
+ for (q = p; *q; q++) {
+ if (isspace((unsigned char)*q)) {
+ qq = '\"';
+ break;
+ }
+ }
+
+ if (qq)
+ putc(qq, fp);
+
+ /* --- Emit the string --- */
+
+ for (q = p; *q; q++) {
+ switch (*q) {
+ case '\a': fputc('\\', fp); fputc('a', fp); break;
+ case '\b': fputc('\\', fp); fputc('b', fp); break;
+ case '\f': fputc('\\', fp); fputc('f', fp); break;
+ case '\n': fputc('\\', fp); fputc('n', fp); break;
+ case '\r': fputc('\\', fp); fputc('r', fp); break;
+ case '\t': fputc('\\', fp); fputc('t', fp); break;
+ case '\v': fputc('\\', fp); fputc('v', fp); break;
+ case '`': fputc('\\', fp); fputc('`', fp); break;
+ case '\'': fputc('\\', fp); fputc('\'', fp); break;
+ case '\"': fputc('\\', fp); fputc('\"', fp); break;
+ case '#': fputc('\\', fp); fputc('#', fp); break;
+ default:
+ putc(*q, fp);
+ break;
+ }
+ }
+
+ /* --- Done --- */
+
+ if (qq)
+ putc(qq, fp);
+}
+
+/*----- Guts --------------------------------------------------------------*/
+
+static int checkhash(const char *file, unsigned f, const gchash *gch)
+{
+ int rc;
+ FILE *fp;
+ dstr d = DSTR_INIT;
+ dstr dd = DSTR_INIT;
+ unsigned long n = 0, nfail = 0;
+ octet *buf = xmalloc(2 * gch->hashsz);
+
+ if (!file)
+ fp = stdin;
+ else if ((fp = fopen(file, f & f_raw ? "r" : "rb")) == 0) {
+ moan("couldn't open `%s': %s", file, strerror(errno));
+ return (EXIT_FAILURE);
+ }
+
+ while (DRESET(&d), dstr_putline(&d, fp) != EOF) {
+ char *p = d.buf;
+ char *q;
+ unsigned ff = f;
+
+ /* --- Handle a directive --- */
+
+ if (*p == '#') {
+ p++;
+ if ((q = str_getword(&p)) == 0)
+ continue;
+ if (strcmp(q, "hash") == 0) {
+ const gchash *g;
+ if ((q = str_getword(&p)) == 0)
+ continue;
+ if ((g = gethash(q)) == 0)
+ continue;
+ gch = g;
+ xfree(buf);
+ buf = xmalloc(2 * gch->hashsz);
+ } else if (strcmp(q, "escape") == 0)
+ f |= f_escape;
+ continue;
+ }
+
+ /* --- Otherwise it's a hex thing --- */
+
+ if ((q = str_getword(&p)) == 0)
+ continue;
+ if (gethex(q, buf, gch->hashsz, 0) < gch->hashsz)
+ continue;
+ while (isspace((unsigned char)*p))
+ p++;
+ if (*p == '*') {
+ p++;
+ ff |= f_binary;
+ }
+ if (!*p)
+ continue;
+
+ if (f & f_escape) {
+ DRESET(&dd);
+ getstring(0, p, &dd, 0);
+ p = dd.buf;
+ }
+
+ if (fhash(p, ff, gch, buf + gch->hashsz)) {
+ moan("couldn't read `%s': %s", p, strerror(errno));
+ rc = EXIT_FAILURE;
+ continue;
+ }
+ if (memcmp(buf, buf + gch->hashsz, gch->hashsz) != 0) {
+ if (ff & f_verbose)
+ fprintf(stderr, "FAIL %s\n", p);
+ else
+ moan("%s check failed for `%s'", gch->name, p);
+ nfail++;
+ rc = EXIT_FAILURE;
+ } else {
+ if (ff & f_verbose)
+ fprintf(stderr, "OK %s\n", p);
+ }
+ n++;
+ }
+
+ dstr_destroy(&d);
+ dstr_destroy(&dd);
+ xfree(buf);
+ if ((f & f_verbose) && nfail)
+ moan("%lu of %lu file(s) failed %s check", nfail, n, gch->name);
+ else if (!n)
+ moan("no files checked");
+ return (0);
+}
+
+static int dohash(const char *file, unsigned f, const gchash *gch)
+{
+ int rc = 0;
+ octet *p = xmalloc(gch->hashsz);
+
+ if (fhash(file, f, gch, p)) {
+ moan("couldn't read `%s': %s", file ? file : "<stdin>", strerror(errno));
+ rc = EXIT_FAILURE;
+ } else {
+ puthex(p, gch->hashsz, stdout);
+ if (file) {
+ fputc(' ', stdout);
+ fputc(f & f_binary ? '*' : ' ', stdout);
+ if (f & f_escape)
+ putstring(stdout, file, 0);
+ else
+ fputs(file, stdout);
+ }
+ fputc('\n', stdout);
+ }
+
+ xfree(p);
+ return (rc);
+}
+
+static int hashfiles(const char *file, unsigned f, const gchash *gch)
+{
+ FILE *fp;
+ dstr d = DSTR_INIT;
+ int rc = 0;
+ int rrc;
+
+ if (!file)
+ fp = stdin;
+ else if ((fp = fopen(file, f & f_raw ? "r" : "rb")) == 0) {
+ moan("couldn't open `%s': %s", file, strerror(errno));
+ return (EXIT_FAILURE);
+ }
+
+ for (;;) {
+ DRESET(&d);
+ if (getstring(fp, 0, &d, f & f_raw))
+ break;
+ if ((rrc = dohash(d.buf, f, gch)) != 0)
+ rc = rrc;
+ }
+
+ return (rc);
+}
+
+static int hashsum(const char *file, unsigned f, const gchash *gch)
+{
+ if (f & f_check)
+ return (checkhash(file, f, gch));
+ if (f & f_files)
+ return (hashfiles(file, f, gch));
+ return (dohash(file, f, gch));
+}
+
+/*----- Main driver -------------------------------------------------------*/
+
+static void version(FILE *fp)
+{
+ pquis(fp, "$, Catacomb version " VERSION "\n");
+}
+
+static void usage(FILE *fp)
+{
+ pquis(fp, "Usage: $ [-f0bcv] [-a algorithm] [files...]\n");
+}
+
+static void help(FILE *fp, const gchash *gch)
+{
+ version(fp);
+ fputc('\n', fp);
+ usage(fp);
+ pquis(fp, "\n\
+Generates or checks message digests on files. Options available:\n\
+\n\
+-h, --help Display this help message.\n\
+-V, --version Display program's version number.\n\
+-u, --usage Display a terse usage message.\n\
+\n\
+-a, --algorithm=ALG Use the message digest algorithm ALG.\n\
+\n\
+-f, --files Read a list of file names from standard input.\n\
+-0, --null File names are null terminated, not plain text.\n\
+\n\
+-e, --escape Escape funny characters in filenames.\n\
+-c, --check Check message digests rather than emitting them.\n\
+-b, --binary When reading files, treat them as binary.\n\
+-v, --verbose Be verbose when checking digests.\n\
+\n\
+For a list of supported message digest algorithms, type `$ --list'.\n\
+");
+ if (gch)
+ fprintf(fp, "The default message digest algorithm is %s.\n", gch->name);
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned f = 0;
+ const gchash *gch = 0;
+ int rc;
+
+ /* --- Initialization --- */
+
+ ego(argv[0]);
+ sub_init();
+
+ /* --- Choose a hash function from the name --- */
+
+ {
+ char *q = xstrdup(QUIS);
+ size_t len = strlen(q);
+ if (len > 3 && strcmp(q + len - 3, "sum") == 0) {
+ q[len - 3] = 0;
+ gch = gethash(q);
+ }
+ if (!gch)
+ gch = hashtab[0];
+ xfree(q);
+ }
+
+ /* --- Read options --- */
+
+ for (;;) {
+ static struct option opts[] = {
+ { "help", 0, 0, 'h' },
+ { "verbose", 0, 0, 'V' },
+ { "usage", 0, 0, 'u' },
+
+ { "algorithm", OPTF_ARGREQ, 0, 'a' },
+ { "hash", OPTF_ARGREQ, 0, 'a' },
+ { "list", 0, 0, 'l' },
+
+ { "files", 0, 0, 'f' },
+ { "find", 0, 0, 'f' },
+ { "null", 0, 0, '0' },
+
+ { "escape", 0, 0, 'e' },
+ { "check", 0, 0, 'c' },
+ { "binary", 0, 0, 'b' },
+ { "verbose", 0, 0, 'v' },
+
+ { 0, 0, 0, 0 }
+ };
+ int i = mdwopt(argc, argv, "hVu a:l f0 ecbv", opts, 0, 0, 0);
+ if (i < 0)
+ break;
+
+ switch (i) {
+ case 'h':
+ help(stdout, gch);
+ exit(0);
+ case 'V':
+ version(stdout);
+ exit(0);
+ case 'u':
+ usage(stdout);
+ exit(0);
+ case 'a':
+ if ((gch = gethash(optarg)) == 0)
+ die(EXIT_FAILURE, "unknown hash algorithm `%s'", optarg);
+ f |= f_oddhash;
+ break;
+ case 'l': {
+ unsigned j;
+ for (j = 0; hashtab[j]; j++) {
+ if (j)
+ fputc(' ', stdout);
+ printf("%s", hashtab[j]->name);
+ }
+ fputc('\n', stdout);
+ exit(0);
+ } break;
+ case 'f':
+ f |= f_files;
+ break;
+ case '0':
+ f |= f_raw;
+ break;
+ case 'e':
+ f |= f_escape;
+ break;
+ case 'c':
+ f |= f_check;
+ break;
+ case 'b':
+ f |= f_binary;
+ break;
+ case 'v':
+ f |= f_verbose;
+ break;
+ default:
+ f |= f_bogus;
+ break;
+ }
+ }
+
+ if (f & f_bogus) {
+ usage(stderr);
+ exit(EXIT_FAILURE);
+ }
+ argv += optind;
+ argc -= optind;
+
+ /* --- Generate output --- */
+
+ if (!(f & f_check)) {
+ if (f & f_oddhash)
+ printf("#hash %s\n", gch->name);
+ if (f & f_escape)
+ fputs("#escape\n", stdout);
+ }
+
+ if (argc) {
+ int i;
+ int rrc;
+ rc = 0;
+ for (i = 0; i < argc; i++) {
+ if ((rrc = hashsum(argv[i], f, gch)) != 0)
+ rc = rrc;
+ }
+ } else
+ rc = hashsum(0, f, gch);
+
+ return (rc);
+}
+
+/*----- That's all, folks -------------------------------------------------*/
projects / u / mdw / catacomb / commitdiff