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config/git: import suckless sbase
i currently use the output of sha512sum in several places of xbmk, which is a bit unreliable in case output changes. other cases where i use util outputs in variables are probably reliable, because i'm using mostly posix utilities in those. to mitigate this, i now import suckless sbase, which has a reasonable sha512sum implementation. *every* binary it builds is being placed in build.list, because i'll probably start using more of them. for example, i may start modifying the "date" implementation, adding the GNU-specific options that i need as mentioned on init.sh i'm importing it in util/ because the sha512sum util is needed for verifying project sources, so if sbase itself is a "project source", that means we can into a chicken and egg bootstrapping problem. this is sbase at revision: 055cc1ae1b3a13c3d8f25af0a4a3316590efcd48 Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
@@ -0,0 +1,184 @@
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/* See LICENSE file for copyright and license details. */
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#include <fcntl.h>
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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 <unistd.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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static void
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mdchecklist(FILE *listfp, struct crypt_ops *ops, uint8_t *md, size_t sz,
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int *formatsucks, int *noread, int *nonmatch)
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{
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int fd;
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size_t bufsiz = 0;
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int r;
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char *line = NULL, *file, *p;
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while (getline(&line, &bufsiz, listfp) > 0) {
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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 ((fd = open(file, O_RDONLY)) < 0) {
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weprintf("open %s:", file);
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(*noread)++;
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continue;
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}
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if (cryptsum(ops, fd, file, md)) {
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(*noread)++;
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continue;
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}
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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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close(fd);
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}
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free(line);
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}
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int
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cryptcheck(int argc, char *argv[], 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 formatsucks = 0, noread = 0, nonmatch = 0, ret = 0;
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if (argc == 0) {
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mdchecklist(stdin, ops, md, sz, &formatsucks, &noread, &nonmatch);
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} else {
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for (; *argv; argc--, argv++) {
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if ((*argv)[0] == '-' && !(*argv)[1]) {
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fp = stdin;
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} else 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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mdchecklist(fp, ops, md, sz, &formatsucks, &noread, &nonmatch);
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if (fp != stdin)
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fclose(fp);
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}
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}
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if (formatsucks) {
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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) {
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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) {
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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[], struct crypt_ops *ops, uint8_t *md, size_t sz)
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{
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int fd;
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int ret = 0;
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if (argc == 0) {
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if (cryptsum(ops, 0, "<stdin>", md))
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ret = 1;
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else
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mdprint(md, "<stdin>", sz);
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} else {
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for (; *argv; argc--, argv++) {
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if ((*argv)[0] == '-' && !(*argv)[1]) {
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*argv = "<stdin>";
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fd = 0;
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} else if ((fd = open(*argv, O_RDONLY)) < 0) {
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weprintf("open %s:", *argv);
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ret = 1;
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continue;
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}
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if (cryptsum(ops, fd, *argv, md))
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ret = 1;
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else
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mdprint(md, *argv, sz);
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if (fd != 0)
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close(fd);
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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, int fd, const char *f, uint8_t *md)
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{
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uint8_t buf[BUFSIZ];
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ssize_t n;
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ops->init(ops->s);
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while ((n = read(fd, buf, sizeof(buf))) > 0)
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ops->update(ops->s, buf, n);
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if (n < 0) {
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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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