}
/* some misc internal functions */
+#if BN_BITS2 != 64
static BN_ULONG _256_data[BN_NIST_256_TOP*6];
static int _is_set_256_data = 0;
static void _init_256_data(void);
+#endif
-static BN_ULONG _384_data[BN_NIST_384_TOP*8];
-static int _is_set_384_data = 0;
-static void _init_384_data(void);
-
-#define BN_NIST_ADD_ONE(a) while (!(++(*(a)))) ++(a);
+#define BN_NIST_ADD_ONE(a) while (!(*(a)=(*(a)+1)&BN_MASK2)) ++(a);
static void nist_cp_bn_0(BN_ULONG *buf, BN_ULONG *a, int top, int max)
{
BN_CTX *ctx)
{
int top = a->top, i;
- BN_ULONG carry = 0;
register BN_ULONG *r_d, *a_d = a->d;
BN_ULONG t_d[BN_NIST_192_TOP],
buf[BN_NIST_192_TOP];
nist_cp_bn_0(buf, a_d + BN_NIST_192_TOP, top - BN_NIST_192_TOP, BN_NIST_192_TOP);
+#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
+# pragma message save
+# pragma message disable BADSUBSCRIPT
+#endif
+
nist_set_192(t_d, buf, 0, 3, 3);
if (bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP))
- ++carry;
+ bn_sub_words(r_d, r_d, _nist_p_192, BN_NIST_192_TOP);
nist_set_192(t_d, buf, 4, 4, 0);
if (bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP))
- ++carry;
+ bn_sub_words(r_d, r_d, _nist_p_192, BN_NIST_192_TOP);
+
+#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
+# pragma message restore
+#endif
nist_set_192(t_d, buf, 5, 5, 5)
if (bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP))
- ++carry;
+ bn_sub_words(r_d, r_d, _nist_p_192, BN_NIST_192_TOP);
- while (carry)
- {
- if (bn_sub_words(r_d, r_d, _nist_p_192, BN_NIST_192_TOP))
- --carry;
- }
r->top = BN_NIST_192_TOP;
bn_correct_top(r);
if (BN_ucmp(r, field) >= 0)
int BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
BN_CTX *ctx)
{
-#if BN_BITS2 != 64
+#if BN_BITS2 == 32
int top = a->top, i;
- int carry = 0;
BN_ULONG *r_d, *a_d = a->d;
BN_ULONG t_d[BN_NIST_224_TOP],
buf[BN_NIST_224_TOP];
nist_set_224(t_d, buf, 10, 9, 8, 7, 0, 0, 0);
if (bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP))
- ++carry;
+ bn_sub_words(r_d,r_d,_nist_p_224,BN_NIST_224_TOP);
nist_set_224(t_d, buf, 0, 13, 12, 11, 0, 0, 0);
if (bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP))
- ++carry;
+ bn_sub_words(r_d,r_d,_nist_p_224,BN_NIST_224_TOP);
nist_set_224(t_d, buf, 13, 12, 11, 10, 9, 8, 7);
if (bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP))
- --carry;
+ bn_add_words(r_d,r_d,_nist_p_224,BN_NIST_224_TOP);
nist_set_224(t_d, buf, 0, 0, 0, 0, 13, 12, 11);
if (bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP))
- --carry;
-
- if (carry > 0)
- while (carry)
- {
- if (bn_sub_words(r_d,r_d,_nist_p_224,BN_NIST_224_TOP))
- --carry;
- }
- else if (carry < 0)
- while (carry)
- {
- if (bn_add_words(r_d,r_d,_nist_p_224,BN_NIST_224_TOP))
- ++carry;
- }
+ bn_add_words(r_d,r_d,_nist_p_224,BN_NIST_224_TOP);
r->top = BN_NIST_224_TOP;
bn_correct_top(r);
#endif
}
+#if BN_BITS2 == 32
static void _init_256_data(void)
{
int i;
}
_is_set_256_data = 1;
}
+#endif
#define nist_set_256(to, from, a1, a2, a3, a4, a5, a6, a7, a8) \
{ \
int BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
BN_CTX *ctx)
{
-#if BN_BITS2 != 64
+#if BN_BITS2 == 32
int i, top = a->top;
int carry = 0;
register BN_ULONG *a_d = a->d, *r_d;
nist_set_256(t_d, buf, 15, 14, 13, 12, 11, 0, 0, 0);
/*S2*/
nist_set_256(t_d2,buf, 0, 15, 14, 13, 12, 0, 0, 0);
- if (bn_add_words(t_d, t_d, t_d2, BN_NIST_256_TOP))
- carry = 2;
+ carry = bn_add_words(t_d, t_d, t_d2, BN_NIST_256_TOP);
/* left shift */
{
register BN_ULONG *ap,t,c;
*(ap++)=((t<<1)|c)&BN_MASK2;
c=(t & BN_TBIT)?1:0;
}
- if (c)
- ++carry;
+ carry <<= 1;
+ carry |= c;
}
- if (bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP))
- ++carry;
+ carry += bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
/*S3*/
nist_set_256(t_d, buf, 15, 14, 0, 0, 0, 10, 9, 8);
- if (bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP))
- ++carry;
+ carry += bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
/*S4*/
nist_set_256(t_d, buf, 8, 13, 15, 14, 13, 11, 10, 9);
- if (bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP))
- ++carry;
+ carry += bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
+
+ if (carry)
+ bn_sub_words(r_d, r_d, _256_data + BN_NIST_256_TOP *
+ (carry-1), BN_NIST_256_TOP);
+
/*D1*/
nist_set_256(t_d, buf, 10, 8, 0, 0, 0, 13, 12, 11);
- if (bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP))
- --carry;
+ carry = bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
/*D2*/
nist_set_256(t_d, buf, 11, 9, 0, 0, 15, 14, 13, 12);
- if (bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP))
- --carry;
+ carry += bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
/*D3*/
nist_set_256(t_d, buf, 12, 0, 10, 9, 8, 15, 14, 13);
- if (bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP))
- --carry;
+ carry += bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
/*D4*/
nist_set_256(t_d, buf, 13, 0, 11, 10, 9, 0, 15, 14);
- if (bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP))
- --carry;
+ carry += bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
if (carry)
- {
- if (carry > 0)
- bn_sub_words(r_d, r_d, _256_data + BN_NIST_256_TOP *
- --carry, BN_NIST_256_TOP);
- else
- {
- carry = -carry;
- bn_add_words(r_d, r_d, _256_data + BN_NIST_256_TOP *
- --carry, BN_NIST_256_TOP);
- }
- }
+ bn_add_words(r_d, r_d, _256_data + BN_NIST_256_TOP *
+ (carry-1), BN_NIST_256_TOP);
r->top = BN_NIST_256_TOP;
bn_correct_top(r);
#endif
}
-static void _init_384_data(void)
- {
- int i;
- BN_ULONG *tmp1 = _384_data;
- const BN_ULONG *tmp2 = tmp1;
-
- memcpy(tmp1, _nist_p_384, BN_NIST_384_TOP * sizeof(BN_ULONG));
- tmp1 += BN_NIST_384_TOP;
-
- for (i=0; i<7; i++)
- {
- bn_add_words(tmp1, _nist_p_384, tmp2, BN_NIST_384_TOP);
- tmp2 = tmp1;
- tmp1 += BN_NIST_384_TOP;
- }
- _is_set_384_data = 1;
- }
-
#define nist_set_384(to,from,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12) \
{ \
if (a12 != 0) bn_cp_32(to, 0, from, (a12) - 12) else bn_32_set_0(to, 0)\
int BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
BN_CTX *ctx)
{
-#if BN_BITS2 != 64
+#if BN_BITS2 == 32
int i, top = a->top;
int carry = 0;
register BN_ULONG *r_d, *a_d = a->d;
BN_ULONG t_d[BN_NIST_384_TOP],
- buf[BN_NIST_384_TOP];
-
- if (!_is_set_384_data)
- {
- CRYPTO_w_lock(CRYPTO_LOCK_BN);
-
- if (!_is_set_384_data)
- _init_384_data();
-
- CRYPTO_w_unlock(CRYPTO_LOCK_BN);
- }
+ buf[BN_NIST_384_TOP],
+ c_d[BN_NIST_384_TOP],
+ *res;
+ size_t mask;
i = BN_ucmp(field, a);
if (i == 0)
register BN_ULONG *ap,t,c;
ap = t_d;
c=0;
- for (i = BN_NIST_256_TOP; i != 0; --i)
+ for (i = 3; i != 0; --i)
{
t= *ap;
*(ap++)=((t<<1)|c)&BN_MASK2;
c=(t & BN_TBIT)?1:0;
}
+ *ap=c;
}
- if (bn_add_words(r_d+(128/BN_BITS2), r_d+(128/BN_BITS2),
- t_d, BN_NIST_256_TOP))
- ++carry;
+ carry = bn_add_words(r_d+(128/BN_BITS2), r_d+(128/BN_BITS2),
+ t_d, BN_NIST_256_TOP);
+ /* this is equivalent to if (result >= module) */
+ mask = 0-(size_t)bn_sub_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = ~mask | (0-(size_t)carry);
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+
/*S2 */
- if (bn_add_words(r_d, r_d, buf, BN_NIST_384_TOP))
- ++carry;
+ carry = bn_add_words(r_d, res, buf, BN_NIST_384_TOP);
+ mask = 0-(size_t)bn_sub_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = ~mask | (0-(size_t)carry);
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+
/*S3*/
nist_set_384(t_d,buf,20,19,18,17,16,15,14,13,12,23,22,21);
- if (bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP))
- ++carry;
+ carry = bn_add_words(r_d, res, t_d, BN_NIST_384_TOP);
+ mask = 0-(size_t)bn_sub_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = ~mask | (0-(size_t)carry);
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+
/*S4*/
nist_set_384(t_d,buf,19,18,17,16,15,14,13,12,20,0,23,0);
- if (bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP))
- ++carry;
+ carry = bn_add_words(r_d, res, t_d, BN_NIST_384_TOP);
+ mask = 0-(size_t)bn_sub_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = ~mask | (0-(size_t)carry);
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+
/*S5*/
- nist_set_256(t_d, buf, 0, 0, 0, 0, 23-4, 22-4, 21-4, 20-4);
- if (bn_add_words(r_d+(128/BN_BITS2), r_d+(128/BN_BITS2),
- t_d, BN_NIST_256_TOP))
- ++carry;
+ nist_set_384(t_d, buf,0,0,0,0,23,22,21,20,0,0,0,0);
+ carry = bn_add_words(r_d, res, t_d, BN_NIST_384_TOP);
+ mask = 0-(size_t)bn_sub_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = ~mask | (0-(size_t)carry);
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+
/*S6*/
nist_set_384(t_d,buf,0,0,0,0,0,0,23,22,21,0,0,20);
- if (bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP))
- ++carry;
+ carry = bn_add_words(r_d, res, t_d, BN_NIST_384_TOP);
+ mask = 0-(size_t)bn_sub_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = ~mask | (0-(size_t)carry);
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+
/*D1*/
nist_set_384(t_d,buf,22,21,20,19,18,17,16,15,14,13,12,23);
- if (bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP))
- --carry;
+#if BRANCH_FREE
+ carry = bn_sub_words(r_d, res, t_d, BN_NIST_384_TOP);
+ bn_add_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = 0-(size_t)carry;
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+#else
+ if (bn_sub_words(r_d, res, t_d, BN_NIST_384_TOP))
+ bn_add_words(r_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+#endif
/*D2*/
nist_set_384(t_d,buf,0,0,0,0,0,0,0,23,22,21,20,0);
+#if BRANCH_FREE
+ carry = bn_sub_words(r_d, res, t_d, BN_NIST_384_TOP);
+ bn_add_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = 0-(size_t)carry;
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+#else
if (bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP))
- --carry;
+ bn_add_words(r_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+#endif
/*D3*/
nist_set_384(t_d,buf,0,0,0,0,0,0,0,23,23,0,0,0);
- if (bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP))
- --carry;
-
- if (carry)
- {
- if (carry > 0)
- bn_sub_words(r_d, r_d, _384_data + BN_NIST_384_TOP *
- --carry, BN_NIST_384_TOP);
- else
- {
- carry = -carry;
- bn_add_words(r_d, r_d, _384_data + BN_NIST_384_TOP *
- --carry, BN_NIST_384_TOP);
- }
- }
+#if BRANCH_FREE
+ carry = bn_sub_words(r_d, res, t_d, BN_NIST_384_TOP);
+ bn_add_words(c_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+ mask = 0-(size_t)carry;
+ res = (BN_ULONG *)(((size_t)c_d&mask) | ((size_t)r_d&~mask));
+ nist_cp_bn(r_d, res, BN_NIST_384_TOP);
+#else
+ if (bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP))
+ bn_add_words(r_d,r_d,_nist_p_384,BN_NIST_384_TOP);
+#endif
r->top = BN_NIST_384_TOP;
bn_correct_top(r);
- if (BN_ucmp(r, field) >= 0)
- {
- bn_sub_words(r_d, r_d, _nist_p_384, BN_NIST_384_TOP);
- bn_correct_top(r);
- }
- bn_check_top(r);
+
return 1;
#else
return 0;
(r_d[BN_NIST_521_TOP-1] & ~(BN_NIST_521_TOP_MASK)))
{
BN_NIST_ADD_ONE(r_d)
- r_d[BN_NIST_521_TOP-1] &= BN_NIST_521_TOP_MASK;
+ r->d[BN_NIST_521_TOP-1] &= BN_NIST_521_TOP_MASK;
}
bn_correct_top(r);
projects / openssl.git / blobdiff