134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2013-2017 Todd C. Miller <Todd.Miller@courtesan.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#ifdef HAVE_STRING_H
|
|
# include <string.h>
|
|
#endif /* HAVE_STRING_H */
|
|
#ifdef HAVE_STRINGS_H
|
|
# include <strings.h>
|
|
#endif /* HAVE_STRINGS_H */
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
|
|
#include <openssl/sha.h>
|
|
|
|
#include "sudoers.h"
|
|
#include "parse.h"
|
|
|
|
union ANY_CTX {
|
|
SHA256_CTX sha256;
|
|
SHA512_CTX sha512;
|
|
};
|
|
|
|
static struct digest_function {
|
|
const unsigned int digest_len;
|
|
int (*init)(union ANY_CTX *);
|
|
int (*update)(union ANY_CTX *, const void *, size_t);
|
|
int (*final)(unsigned char *, union ANY_CTX *);
|
|
} digest_functions[] = {
|
|
{
|
|
SHA224_DIGEST_LENGTH,
|
|
(int (*)(union ANY_CTX *))SHA224_Init,
|
|
(int (*)(union ANY_CTX *, const void *, size_t))SHA224_Update,
|
|
(int (*)(unsigned char *, union ANY_CTX *))SHA224_Final
|
|
}, {
|
|
SHA256_DIGEST_LENGTH,
|
|
(int (*)(union ANY_CTX *))SHA256_Init,
|
|
(int (*)(union ANY_CTX *, const void *, size_t))SHA256_Update,
|
|
(int (*)(unsigned char *, union ANY_CTX *))SHA256_Final
|
|
}, {
|
|
SHA384_DIGEST_LENGTH,
|
|
(int (*)(union ANY_CTX *))SHA384_Init,
|
|
(int (*)(union ANY_CTX *, const void *, size_t))SHA384_Update,
|
|
(int (*)(unsigned char *, union ANY_CTX *))SHA384_Final
|
|
}, {
|
|
SHA512_DIGEST_LENGTH,
|
|
(int (*)(union ANY_CTX *))SHA512_Init,
|
|
(int (*)(union ANY_CTX *, const void *, size_t))SHA512_Update,
|
|
(int (*)(unsigned char *, union ANY_CTX *))SHA512_Final
|
|
}, {
|
|
0
|
|
}
|
|
};
|
|
|
|
unsigned char *
|
|
sudo_filedigest(int fd, const char *file, int digest_type, size_t *digest_len)
|
|
{
|
|
struct digest_function *func = NULL;
|
|
unsigned char *file_digest = NULL;
|
|
unsigned char buf[32 * 1024];
|
|
size_t nread;
|
|
union ANY_CTX ctx;
|
|
int i, fd2;
|
|
FILE *fp = NULL;
|
|
debug_decl(sudo_filedigest, SUDOERS_DEBUG_UTIL)
|
|
|
|
for (i = 0; digest_functions[i].digest_len != 0; i++) {
|
|
if (digest_type == i) {
|
|
func = &digest_functions[i];
|
|
break;
|
|
}
|
|
}
|
|
if (func == NULL) {
|
|
sudo_warnx(U_("unsupported digest type %d for %s"), digest_type, file);
|
|
goto bad;
|
|
}
|
|
|
|
if ((fd2 = dup(fd)) == -1) {
|
|
sudo_debug_printf(SUDO_DEBUG_INFO, "unable to dup %s: %s",
|
|
file, strerror(errno));
|
|
goto bad;
|
|
}
|
|
if ((fp = fdopen(fd2, "r")) == NULL) {
|
|
sudo_debug_printf(SUDO_DEBUG_INFO, "unable to fdopen %s: %s",
|
|
file, strerror(errno));
|
|
close(fd2);
|
|
goto bad;
|
|
}
|
|
if ((file_digest = malloc(func->digest_len)) == NULL) {
|
|
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
|
|
goto bad;
|
|
}
|
|
|
|
func->init(&ctx);
|
|
while ((nread = fread(buf, 1, sizeof(buf), fp)) != 0) {
|
|
func->update(&ctx, buf, nread);
|
|
}
|
|
if (ferror(fp)) {
|
|
sudo_warnx(U_("%s: read error"), file);
|
|
goto bad;
|
|
}
|
|
func->final(file_digest, &ctx);
|
|
fclose(fp);
|
|
|
|
*digest_len = func->digest_len;
|
|
debug_return_ptr(file_digest);
|
|
bad:
|
|
free(file_digest);
|
|
if (fp != NULL)
|
|
fclose(fp);
|
|
debug_return_ptr(NULL);
|
|
}
|