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Remove isc_safe_memcompare, it's not needed anywhere and can't be replaced with CRYPTO_memcmp()

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This commit is contained in:
Ondřej Surý
2018-07-20 10:06:14 -04:00
parent 66ba2fdad5
commit b105ccee68
5 changed files with 5 additions and 29 deletions
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2
bin/dnssec/dnssec-signzone.c
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@@ -789,7 +789,7 @@ hashlist_add_dns_name(hashlist_t *l, /*const*/ dns_name_t *name,
static int
hashlist_comp(const void *a, const void *b) {
return (isc_safe_memcompare(a, b, hash_length + 1));
return (memcmp(a, b, hash_length + 1));
}
static void

4
lib/dns/nsec3.c
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@@ -1955,7 +1955,7 @@ dns_nsec3_noexistnodata(dns_rdatatype_t type, const dns_name_t *name,
* Work out what this NSEC3 covers.
* Inside (<0) or outside (>=0).
*/
scope = isc_safe_memcompare(owner, nsec3.next, nsec3.next_length);
scope = memcmp(owner, nsec3.next, nsec3.next_length);
/*
* Prepare to compute all the hashes.
@@ -1979,7 +1979,7 @@ dns_nsec3_noexistnodata(dns_rdatatype_t type, const dns_name_t *name,
return (ISC_R_IGNORE);
}
order = isc_safe_memcompare(hash, owner, length);
order = memcmp(hash, owner, length);
if (first && order == 0) {
/*
* The hashes are the same.

4
lib/dns/spnego.c
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@@ -368,7 +368,7 @@ gssapi_spnego_decapsulate(OM_uint32 *,
/* mod_auth_kerb.c */
static int
static isc_boolean_t
cmp_gss_type(gss_buffer_t token, gss_OID gssoid)
{
unsigned char *p;
@@ -392,7 +392,7 @@ cmp_gss_type(gss_buffer_t token, gss_OID gssoid)
if (((OM_uint32) *p++) != gssoid->length)
return (GSS_S_DEFECTIVE_TOKEN);
return (isc_safe_memcompare(p, gssoid->elements, gssoid->length));
return (!isc_safe_memequal(p, gssoid->elements, gssoid->length));
}
/* accept_sec_context.c */

5
lib/isc/include/isc/safe.h
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@@ -29,11 +29,6 @@ ISC_LANG_BEGINDECLS
*
*/
#define isc_safe_memcompare(b1, b2, n) CRYPTO_memcmp(b1, b2, n)
/*%<
* Clone of libc memcmp() which is safe to differential timing attacks.
*/
#define isc_safe_memwipe(ptr, len) OPENSSL_cleanse(ptr, len)
/*%<
* Clear the memory of length `len` pointed to by `ptr`.

19
lib/isc/tests/safe_test.c
View File

@@ -39,24 +39,6 @@ ATF_TC_BODY(isc_safe_memequal, tc) {
"\x00\x00\x00\x00", 4));
}
ATF_TC(isc_safe_memcompare);
ATF_TC_HEAD(isc_safe_memcompare, tc) {
atf_tc_set_md_var(tc, "descr", "safe memcompare()");
}
ATF_TC_BODY(isc_safe_memcompare, tc) {
UNUSED(tc);
ATF_CHECK(isc_safe_memcompare("test", "test", 4) == 0);
ATF_CHECK(isc_safe_memcompare("test", "tesc", 4) > 0);
ATF_CHECK(isc_safe_memcompare("test", "tesy", 4) < 0);
ATF_CHECK(isc_safe_memcompare("\x00\x00\x00\x00",
"\x00\x00\x00\x00", 4) == 0);
ATF_CHECK(isc_safe_memcompare("\x00\x00\x00\x00",
"\x00\x00\x00\x01", 4) < 0);
ATF_CHECK(isc_safe_memcompare("\x00\x00\x00\x02",
"\x00\x00\x00\x00", 4) > 0);
}
ATF_TC(isc_safe_memwipe);
ATF_TC_HEAD(isc_safe_memwipe, tc) {
atf_tc_set_md_var(tc, "descr", "isc_safe_memwipe()");
@@ -106,7 +88,6 @@ ATF_TC_BODY(isc_safe_memwipe, tc) {
*/
ATF_TP_ADD_TCS(tp) {
ATF_TP_ADD_TC(tp, isc_safe_memequal);
ATF_TP_ADD_TC(tp, isc_safe_memcompare);
ATF_TP_ADD_TC(tp, isc_safe_memwipe);
return (atf_no_error());
}