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Differential D9423 Diff 24712 head/sbin/hastd/hast_checksum.c

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head/sbin/hastd/hast_checksum.c

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#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include <errno.h> #include <errno.h>
#include <string.h> #include <string.h>
#include <strings.h> #include <strings.h>
#ifdef HAVE_CRYPTO
#include <openssl/sha.h>
#endif
#include <crc32.h> #include <crc32.h>
#include <hast.h> #include <hast.h>
#include <nv.h> #include <nv.h>
#include <sha256.h>
#include <pjdlog.h> #include <pjdlog.h>
#include "hast_checksum.h" #include "hast_checksum.h"
#ifdef HAVE_CRYPTO
#define MAX_HASH_SIZE SHA256_DIGEST_LENGTH #define MAX_HASH_SIZE SHA256_DIGEST_LENGTH
#else
#define MAX_HASH_SIZE 4
#endif
static void static void
hast_crc32_checksum(const unsigned char *data, size_t size, hast_crc32_checksum(const unsigned char *data, size_t size,
unsigned char *hash, size_t *hsizep) unsigned char *hash, size_t *hsizep)
{ {
uint32_t crc; uint32_t crc;
crc = crc32(data, size); crc = crc32(data, size);
/* XXXPJD: Do we have to use htole32() on crc first? */ /* XXXPJD: Do we have to use htole32() on crc first? */
bcopy(&crc, hash, sizeof(crc)); bcopy(&crc, hash, sizeof(crc));
*hsizep = sizeof(crc); *hsizep = sizeof(crc);
} }
#ifdef HAVE_CRYPTO
static void static void
hast_sha256_checksum(const unsigned char *data, size_t size, hast_sha256_checksum(const unsigned char *data, size_t size,
unsigned char *hash, size_t *hsizep) unsigned char *hash, size_t *hsizep)
{ {
SHA256_CTX ctx; SHA256_CTX ctx;
SHA256_Init(&ctx); SHA256_Init(&ctx);
SHA256_Update(&ctx, data, size); SHA256_Update(&ctx, data, size);
SHA256_Final(hash, &ctx); SHA256_Final(hash, &ctx);
*hsizep = SHA256_DIGEST_LENGTH; *hsizep = SHA256_DIGEST_LENGTH;
} }
#endif /* HAVE_CRYPTO */
const char * const char *
checksum_name(int num) checksum_name(int num)
{ {
switch (num) { switch (num) {
case HAST_CHECKSUM_NONE: case HAST_CHECKSUM_NONE:
return ("none"); return ("none");
Show All 13 Lineschecksum_send(const struct hast_resource *res, struct nv *nv, void **datap,
size_t hsize; size_t hsize;
switch (res->hr_checksum) { switch (res->hr_checksum) {
case HAST_CHECKSUM_NONE: case HAST_CHECKSUM_NONE:
return (0); return (0);
case HAST_CHECKSUM_CRC32: case HAST_CHECKSUM_CRC32:
hast_crc32_checksum(*datap, *sizep, hash, &hsize); hast_crc32_checksum(*datap, *sizep, hash, &hsize);
break; break;
#ifdef HAVE_CRYPTO
case HAST_CHECKSUM_SHA256: case HAST_CHECKSUM_SHA256:
hast_sha256_checksum(*datap, *sizep, hash, &hsize); hast_sha256_checksum(*datap, *sizep, hash, &hsize);
break; break;
#endif
default: default:
PJDLOG_ABORT("Invalid checksum: %d.", res->hr_checksum); PJDLOG_ABORT("Invalid checksum: %d.", res->hr_checksum);
} }
nv_add_string(nv, checksum_name(res->hr_checksum), "checksum"); nv_add_string(nv, checksum_name(res->hr_checksum), "checksum");
nv_add_uint8_array(nv, hash, hsize, "hash"); nv_add_uint8_array(nv, hash, hsize, "hash");
if (nv_error(nv) != 0) { if (nv_error(nv) != 0) {
errno = nv_error(nv); errno = nv_error(nv);
return (-1); return (-1);
Show All 15 Lines if (algo == NULL)
return (0); /* No checksum. */ return (0); /* No checksum. */
rhash = nv_get_uint8_array(nv, &rhsize, "hash"); rhash = nv_get_uint8_array(nv, &rhsize, "hash");
if (rhash == NULL) { if (rhash == NULL) {
pjdlog_error("Hash is missing."); pjdlog_error("Hash is missing.");
return (-1); /* Hash not found. */ return (-1); /* Hash not found. */
} }
if (strcmp(algo, "crc32") == 0) if (strcmp(algo, "crc32") == 0)
hast_crc32_checksum(*datap, *sizep, chash, &chsize); hast_crc32_checksum(*datap, *sizep, chash, &chsize);
#ifdef HAVE_CRYPTO
else if (strcmp(algo, "sha256") == 0) else if (strcmp(algo, "sha256") == 0)
hast_sha256_checksum(*datap, *sizep, chash, &chsize); hast_sha256_checksum(*datap, *sizep, chash, &chsize);
#endif
else { else {
pjdlog_error("Unknown checksum algorithm '%s'.", algo); pjdlog_error("Unknown checksum algorithm '%s'.", algo);
return (-1); /* Unknown checksum algorithm. */ return (-1); /* Unknown checksum algorithm. */
} }
if (rhsize != chsize) { if (rhsize != chsize) {
pjdlog_error("Invalid hash size (%zu) for %s, should be %zu.", pjdlog_error("Invalid hash size (%zu) for %s, should be %zu.",
rhsize, algo, chsize); rhsize, algo, chsize);
return (-1); /* Different hash size. */ return (-1); /* Different hash size. */
} }
if (bcmp(rhash, chash, chsize) != 0) { if (bcmp(rhash, chash, chsize) != 0) {
pjdlog_error("Hash mismatch."); pjdlog_error("Hash mismatch.");
return (-1); /* Hash mismatch. */ return (-1); /* Hash mismatch. */
} }
return (0); return (0);
} }