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Import OpenSSL 1.1.0i

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This commit is contained in:
Steve Dower
2018-08-14 08:22:53 -07:00
parent 807cee26df
commit 6960e8d7c7
282 changed files with 5215 additions and 2261 deletions
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85
crypto/bn/bn_lib.c
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@@ -12,6 +12,7 @@
#include "internal/cryptlib.h"
#include "bn_lcl.h"
#include <openssl/opensslconf.h>
#include "internal/constant_time_locl.h"
/* This stuff appears to be completely unused, so is deprecated */
#if OPENSSL_API_COMPAT < 0x00908000L
@@ -222,8 +223,6 @@ static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
const BN_ULONG *B;
int i;
bn_check_top(b);
if (words > (INT_MAX / (4 * BN_BITS2))) {
BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);
return NULL;
@@ -298,8 +297,6 @@ static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
BIGNUM *bn_expand2(BIGNUM *b, int words)
{
bn_check_top(b);
if (words > b->dmax) {
BN_ULONG *a = bn_expand_internal(b, words);
if (!a)
@@ -312,7 +309,6 @@ BIGNUM *bn_expand2(BIGNUM *b, int words)
b->dmax = words;
}
bn_check_top(b);
return b;
}
@@ -379,12 +375,19 @@ BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
memcpy(a->d, b->d, sizeof(b->d[0]) * b->top);
#endif
a->top = b->top;
a->neg = b->neg;
a->top = b->top;
a->flags |= b->flags & BN_FLG_FIXED_TOP;
bn_check_top(a);
return (a);
}
#define FLAGS_DATA(flags) ((flags) & (BN_FLG_STATIC_DATA \
| BN_FLG_CONSTTIME \
| BN_FLG_SECURE \
| BN_FLG_FIXED_TOP))
#define FLAGS_STRUCT(flags) ((flags) & (BN_FLG_MALLOCED))
void BN_swap(BIGNUM *a, BIGNUM *b)
{
int flags_old_a, flags_old_b;
@@ -412,10 +415,8 @@ void BN_swap(BIGNUM *a, BIGNUM *b)
b->dmax = tmp_dmax;
b->neg = tmp_neg;
a->flags =
(flags_old_a & BN_FLG_MALLOCED) | (flags_old_b & BN_FLG_STATIC_DATA);
b->flags =
(flags_old_b & BN_FLG_MALLOCED) | (flags_old_a & BN_FLG_STATIC_DATA);
a->flags = FLAGS_STRUCT(flags_old_a) | FLAGS_DATA(flags_old_b);
b->flags = FLAGS_STRUCT(flags_old_b) | FLAGS_DATA(flags_old_a);
bn_check_top(a);
bn_check_top(b);
}
@@ -425,8 +426,9 @@ void BN_clear(BIGNUM *a)
bn_check_top(a);
if (a->d != NULL)
OPENSSL_cleanse(a->d, sizeof(*a->d) * a->dmax);
a->top = 0;
a->neg = 0;
a->top = 0;
a->flags &= ~BN_FLG_FIXED_TOP;
}
BN_ULONG BN_get_word(const BIGNUM *a)
@@ -447,6 +449,7 @@ int BN_set_word(BIGNUM *a, BN_ULONG w)
a->neg = 0;
a->d[0] = w;
a->top = (w ? 1 : 0);
a->flags &= ~BN_FLG_FIXED_TOP;
bn_check_top(a);
return (1);
}
@@ -499,24 +502,29 @@ BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)
/* ignore negative */
static int bn2binpad(const BIGNUM *a, unsigned char *to, int tolen)
{
int i;
int n;
size_t i, inc, lasti, j;
BN_ULONG l;
bn_check_top(a);
i = BN_num_bytes(a);
n = BN_num_bytes(a);
if (tolen == -1)
tolen = i;
else if (tolen < i)
tolen = n;
else if (tolen < n)
return -1;
/* Add leading zeroes if necessary */
if (tolen > i) {
memset(to, 0, tolen - i);
to += tolen - i;
if (n == 0) {
OPENSSL_cleanse(to, tolen);
return tolen;
}
while (i--) {
lasti = n - 1;
for (i = 0, inc = 1, j = tolen; j > 0;) {
l = a->d[i / BN_BYTES];
*(to++) = (unsigned char)(l >> (8 * (i % BN_BYTES))) & 0xff;
to[--j] = (unsigned char)(l >> (8 * (i % BN_BYTES)) & (0 - inc));
inc = (i - lasti) >> (8 * sizeof(i) - 1);
i += inc; /* stay on top limb */
}
return tolen;
}
@@ -683,6 +691,7 @@ int BN_set_bit(BIGNUM *a, int n)
for (k = a->top; k < i + 1; k++)
a->d[k] = 0;
a->top = i + 1;
a->flags &= ~BN_FLG_FIXED_TOP;
}
a->d[i] |= (((BN_ULONG)1) << j);
@@ -824,6 +833,34 @@ void BN_consttime_swap(BN_ULONG condition, BIGNUM *a, BIGNUM *b, int nwords)
a->top ^= t;
b->top ^= t;
t = (a->neg ^ b->neg) & condition;
a->neg ^= t;
b->neg ^= t;
/*-
* Idea behind BN_FLG_STATIC_DATA is actually to
* indicate that data may not be written to.
* Intention is actually to treat it as it's
* read-only data, and some (if not most) of it does
* reside in read-only segment. In other words
* observation of BN_FLG_STATIC_DATA in
* BN_consttime_swap should be treated as fatal
* condition. It would either cause SEGV or
* effectively cause data corruption.
* BN_FLG_MALLOCED refers to BN structure itself,
* and hence must be preserved. Remaining flags are
* BN_FLG_CONSTIME and BN_FLG_SECURE. Latter must be
* preserved, because it determines how x->d was
* allocated and hence how to free it. This leaves
* BN_FLG_CONSTTIME that one can do something about.
* To summarize it's sufficient to mask and swap
* BN_FLG_CONSTTIME alone. BN_FLG_STATIC_DATA should
* be treated as fatal.
*/
t = ((a->flags ^ b->flags) & BN_FLG_CONSTTIME) & condition;
a->flags ^= t;
b->flags ^= t;
#define BN_CONSTTIME_SWAP(ind) \
do { \
t = (a->d[ind] ^ b->d[ind]) & condition; \
@@ -887,8 +924,9 @@ int BN_security_bits(int L, int N)
void BN_zero_ex(BIGNUM *a)
{
a->top = 0;
a->neg = 0;
a->top = 0;
a->flags &= ~BN_FLG_FIXED_TOP;
}
int BN_abs_is_word(const BIGNUM *a, const BN_ULONG w)
@@ -1012,5 +1050,6 @@ void bn_correct_top(BIGNUM *a)
}
if (a->top == 0)
a->neg = 0;
a->flags &= ~BN_FLG_FIXED_TOP;
bn_pollute(a);
}