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Correct a typo.
[oweals/openssl.git]
/
crypto
/
bn
/
bn_exp2.c
diff --git
a/crypto/bn/bn_exp2.c
b/crypto/bn/bn_exp2.c
index 29029f4c724a6c8cfcbef584347ca068ee73d535..73ccd58a83aa1f1c9f4a6bc8313b69ed7d4ebb05 100644
(file)
--- a/
crypto/bn/bn_exp2.c
+++ b/
crypto/bn/bn_exp2.c
@@
-115,13
+115,14
@@
#define TABLE_SIZE 32
#define TABLE_SIZE 32
-int BN_mod_exp2_mont(BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2,
- BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont)
+int BN_mod_exp2_mont(BIGNUM *rr, const BIGNUM *a1, const BIGNUM *p1,
+ const BIGNUM *a2, const BIGNUM *p2, const BIGNUM *m,
+ BN_CTX *ctx, BN_MONT_CTX *in_mont)
{
int i,j,bits,b,bits1,bits2,ret=0,wpos1,wpos2,window1,window2,wvalue1,wvalue2;
int r_is_one=1,ts1=0,ts2=0;
BIGNUM *d,*r;
{
int i,j,bits,b,bits1,bits2,ret=0,wpos1,wpos2,window1,window2,wvalue1,wvalue2;
int r_is_one=1,ts1=0,ts2=0;
BIGNUM *d,*r;
- BIGNUM *a_mod_m;
+
const
BIGNUM *a_mod_m;
BIGNUM val1[TABLE_SIZE], val2[TABLE_SIZE];
BN_MONT_CTX *mont=NULL;
BIGNUM val1[TABLE_SIZE], val2[TABLE_SIZE];
BN_MONT_CTX *mont=NULL;
@@
-140,9
+141,10
@@
int BN_mod_exp2_mont(BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2,
bits2=BN_num_bits(p2);
if ((bits1 == 0) && (bits2 == 0))
{
bits2=BN_num_bits(p2);
if ((bits1 == 0) && (bits2 == 0))
{
- BN_one(rr);
- return
(1)
;
+
ret =
BN_one(rr);
+ return
ret
;
}
}
+
bits=(bits1 > bits2)?bits1:bits2;
BN_CTX_start(ctx);
bits=(bits1 > bits2)?bits1:bits2;
BN_CTX_start(ctx);
@@
-166,7
+168,7
@@
int BN_mod_exp2_mont(BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2,
*/
BN_init(&val1[0]);
ts1=1;
*/
BN_init(&val1[0]);
ts1=1;
- if (BN_ucmp(a1,m) >= 0)
+ if (
a1->neg ||
BN_ucmp(a1,m) >= 0)
{
if (!BN_mod(&(val1[0]),a1,m,ctx))
goto err;
{
if (!BN_mod(&(val1[0]),a1,m,ctx))
goto err;
@@
-174,6
+176,12
@@
int BN_mod_exp2_mont(BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2,
}
else
a_mod_m = a1;
}
else
a_mod_m = a1;
+ if (BN_is_zero(a_mod_m))
+ {
+ ret = BN_zero(rr);
+ goto err;
+ }
+
if (!BN_to_montgomery(&(val1[0]),a_mod_m,mont,ctx)) goto err;
if (window1 > 1)
{
if (!BN_to_montgomery(&(val1[0]),a_mod_m,mont,ctx)) goto err;
if (window1 > 1)
{
@@
-195,7
+203,7
@@
int BN_mod_exp2_mont(BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2,
*/
BN_init(&val2[0]);
ts2=1;
*/
BN_init(&val2[0]);
ts2=1;
- if (BN_ucmp(a2,m) >= 0)
+ if (
a2->neg ||
BN_ucmp(a2,m) >= 0)
{
if (!BN_mod(&(val2[0]),a2,m,ctx))
goto err;
{
if (!BN_mod(&(val2[0]),a2,m,ctx))
goto err;
@@
-203,6
+211,11
@@
int BN_mod_exp2_mont(BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2,
}
else
a_mod_m = a2;
}
else
a_mod_m = a2;
+ if (BN_is_zero(a_mod_m))
+ {
+ ret = BN_zero(rr);
+ goto err;
+ }
if (!BN_to_montgomery(&(val2[0]),a_mod_m,mont,ctx)) goto err;
if (window2 > 1)
{
if (!BN_to_montgomery(&(val2[0]),a_mod_m,mont,ctx)) goto err;
if (window2 > 1)
{