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bn_nist.c: compensate for VC bug [with optimization off!].

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PR: 2837
This commit is contained in:
Andy Polyakov 2012-07-02 13:30:32 +00:00
parent 8d00f34239
commit 32e03a3016
1 changed files with 10 additions and 5 deletions
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15
crypto/bn/bn_nist.c
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@ -474,8 +474,9 @@ int BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
*/
mask = 0-(PTR_SIZE_INT)bn_sub_words(c_d,r_d,_nist_p_192[0],BN_NIST_192_TOP);
mask &= 0-(PTR_SIZE_INT)carry;
res = c_d;
res = (BN_ULONG *)
(((PTR_SIZE_INT)c_d&~mask) | ((PTR_SIZE_INT)r_d&mask));
(((PTR_SIZE_INT)res&~mask) | ((PTR_SIZE_INT)r_d&mask));
nist_cp_bn(r_d, res, BN_NIST_192_TOP);
r->top = BN_NIST_192_TOP;
bn_correct_top(r);
@ -632,7 +633,8 @@ int BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
/* otherwise it's effectively same as in BN_nist_mod_192... */
mask = 0-(PTR_SIZE_INT)(*u.f)(c_d,r_d,_nist_p_224[0],BN_NIST_224_TOP);
mask &= 0-(PTR_SIZE_INT)carry;
res = (BN_ULONG *)(((PTR_SIZE_INT)c_d&~mask) |
res = c_d;
res = (BN_ULONG *)(((PTR_SIZE_INT)res&~mask) |
((PTR_SIZE_INT)r_d&mask));
nist_cp_bn(r_d, res, BN_NIST_224_TOP);
r->top = BN_NIST_224_TOP;
@ -831,7 +833,8 @@ int BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
mask = 0-(PTR_SIZE_INT)(*u.f)(c_d,r_d,_nist_p_256[0],BN_NIST_256_TOP);
mask &= 0-(PTR_SIZE_INT)carry;
res = (BN_ULONG *)(((PTR_SIZE_INT)c_d&~mask) |
res = c_d;
res = (BN_ULONG *)(((PTR_SIZE_INT)res&~mask) |
((PTR_SIZE_INT)r_d&mask));
nist_cp_bn(r_d, res, BN_NIST_256_TOP);
r->top = BN_NIST_256_TOP;
@ -1052,7 +1055,8 @@ int BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
mask = 0-(PTR_SIZE_INT)(*u.f)(c_d,r_d,_nist_p_384[0],BN_NIST_384_TOP);
mask &= 0-(PTR_SIZE_INT)carry;
res = (BN_ULONG *)(((PTR_SIZE_INT)c_d&~mask) |
res = c_d;
res = (BN_ULONG *)(((PTR_SIZE_INT)res&~mask) |
((PTR_SIZE_INT)r_d&mask));
nist_cp_bn(r_d, res, BN_NIST_384_TOP);
r->top = BN_NIST_384_TOP;
@ -1118,7 +1122,8 @@ int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
bn_add_words(r_d,r_d,t_d,BN_NIST_521_TOP);
mask = 0-(PTR_SIZE_INT)bn_sub_words(t_d,r_d,_nist_p_521,BN_NIST_521_TOP);
res = (BN_ULONG *)(((PTR_SIZE_INT)t_d&~mask) |
res = t_d;
res = (BN_ULONG *)(((PTR_SIZE_INT)res&~mask) |
((PTR_SIZE_INT)r_d&mask));
nist_cp_bn(r_d,res,BN_NIST_521_TOP);
r->top = BN_NIST_521_TOP;