157 lines
3.0 KiB
C
157 lines
3.0 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../crypt.h"
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#include "../text.h"
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#include "../util.h"
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static int
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hexdec(int c)
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{
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if (c >= '0' && c <= '9')
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return c - '0';
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else if (c >= 'A' && c <= 'F')
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return c - 'A' + 10;
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else if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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return -1; /* unknown character */
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}
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static int
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mdcheckline(const char *s, uint8_t *md, size_t sz)
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{
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size_t i;
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int b1, b2;
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for (i = 0; i < sz; i++) {
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if (!*s || (b1 = hexdec(*s++)) < 0)
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return -1; /* invalid format */
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if (!*s || (b2 = hexdec(*s++)) < 0)
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return -1; /* invalid format */
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if ((uint8_t)((b1 << 4) | b2) != md[i])
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return 0; /* value mismatch */
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}
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return (i == sz) ? 1 : 0;
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}
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int
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cryptcheck(char *sumfile, int argc, char *argv[],
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struct crypt_ops *ops, uint8_t *md, size_t sz)
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{
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FILE *cfp, *fp;
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char *line = NULL, *file, *p;
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int r, nonmatch = 0, formatsucks = 0, noread = 0, ret = 0;
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size_t bufsiz = 0;
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if (!sumfile)
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cfp = stdin;
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else if (!(cfp = fopen(sumfile, "r")))
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eprintf("fopen %s:", sumfile);
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while (getline(&line, &bufsiz, cfp) != -1) {
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if (!(file = strstr(line, " "))) {
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formatsucks++;
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continue;
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}
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if ((file - line) / 2 != sz) {
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formatsucks++; /* checksum length mismatch */
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continue;
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}
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*file = '\0';
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file += 2;
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for (p = file; *p && *p != '\n' && *p != '\r'; p++); /* strip newline */
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*p = '\0';
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if (!(fp = fopen(file, "r"))) {
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weprintf("fopen %s:", file);
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noread++;
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continue;
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}
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cryptsum(ops, fp, file, md);
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r = mdcheckline(line, md, sz);
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if (r == 1) {
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printf("%s: OK\n", file);
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} else if (r == 0) {
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printf("%s: FAILED\n", file);
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nonmatch++;
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} else {
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formatsucks++;
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}
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fclose(fp);
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}
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if (sumfile)
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fclose(cfp);
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free(line);
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if (formatsucks > 0) {
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weprintf("%d lines are improperly formatted\n", formatsucks);
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ret = 1;
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}
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if (noread > 0) {
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weprintf("%d listed file could not be read\n", noread);
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ret = 1;
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}
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if (nonmatch > 0) {
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weprintf("%d computed checksums did NOT match\n", nonmatch);
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ret = 1;
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}
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return ret;
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}
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int
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cryptmain(int argc, char *argv[],
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struct crypt_ops *ops, uint8_t *md, size_t sz)
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{
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FILE *fp;
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int ret = 0;
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if (argc == 0) {
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cryptsum(ops, stdin, "<stdin>", md);
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mdprint(md, "<stdin>", sz);
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} else {
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for (; argc > 0; argc--) {
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if (!(fp = fopen(*argv, "r"))) {
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weprintf("fopen %s:", *argv);
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ret = 1;
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continue;
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}
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if (cryptsum(ops, fp, *argv, md) == 1)
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ret = 1;
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else
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mdprint(md, *argv, sz);
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fclose(fp);
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argv++;
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}
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}
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return ret;
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}
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int
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cryptsum(struct crypt_ops *ops, FILE *fp, const char *f,
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uint8_t *md)
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{
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uint8_t buf[BUFSIZ];
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size_t n;
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ops->init(ops->s);
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while ((n = fread(buf, 1, sizeof(buf), fp)) > 0)
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ops->update(ops->s, buf, n);
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if (ferror(fp)) {
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weprintf("%s: read error:", f);
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return 1;
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}
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ops->sum(ops->s, md);
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return 0;
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}
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void
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mdprint(const uint8_t *md, const char *f, size_t len)
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{
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size_t i;
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for (i = 0; i < len; i++)
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printf("%02x", md[i]);
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printf(" %s\n", f);
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}
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