Adjust various bignum functions to use BN_CTX for variables instead of

[openssl.git] / crypto / bn / bn_mont.c

diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c
index 14650ab9d5a4e2c8c77898ae12fccb9d066006cc..287392db0f000b8a3aec38f668e8548859071e29 100644 (file)
--- a/crypto/bn/bn_mont.c
+++ b/crypto/bn/bn_mont.c
@@ -271,9 +271,11 @@ void BN_MONT_CTX_free(BN_MONT_CTX *mont)
 
 int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
        {
-       BIGNUM Ri,*R;
+       int ret = 0;
+       BIGNUM *Ri,*R;
 
-       BN_init(&Ri);
+       BN_CTX_start(ctx);
+       if((Ri = BN_CTX_get(ctx)) == NULL) goto err;
        R= &(mont->RR);                                 /* grab RR as a temp */
        BN_copy(&(mont->N),mod);                        /* Set N */
        mont->N.neg = 0;
@@ -294,22 +296,21 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
                tmod.dmax=2;
                tmod.neg=0;
                                                        /* Ri = R^-1 mod N*/
-               if ((BN_mod_inverse(&Ri,R,&tmod,ctx)) == NULL)
+               if ((BN_mod_inverse(Ri,R,&tmod,ctx)) == NULL)
                        goto err;
-               if (!BN_lshift(&Ri,&Ri,BN_BITS2)) goto err; /* R*Ri */
-               if (!BN_is_zero(&Ri))
+               if (!BN_lshift(Ri,Ri,BN_BITS2)) goto err; /* R*Ri */
+               if (!BN_is_zero(Ri))
                        {
-                       if (!BN_sub_word(&Ri,1)) goto err;
+                       if (!BN_sub_word(Ri,1)) goto err;
                        }
                else /* if N mod word size == 1 */
                        {
-                       if (!BN_set_word(&Ri,BN_MASK2)) goto err;  /* Ri-- (mod word size) */
+                       if (!BN_set_word(Ri,BN_MASK2)) goto err;  /* Ri-- (mod word size) */
                        }
-               if (!BN_div(&Ri,NULL,&Ri,&tmod,ctx)) goto err;
+               if (!BN_div(Ri,NULL,Ri,&tmod,ctx)) goto err;
                /* Ni = (R*Ri-1)/N,
                 * keep only least significant word: */
-               mont->n0 = (Ri.top > 0) ? Ri.d[0] : 0;
-               BN_free(&Ri);
+               mont->n0 = (Ri->top > 0) ? Ri->d[0] : 0;
                }
 #else /* !MONT_WORD */
                { /* bignum version */
@@ -317,13 +318,12 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
                BN_zero(R);
                if (!BN_set_bit(R,mont->ri)) goto err;  /* R = 2^ri */
                                                        /* Ri = R^-1 mod N*/
-               if ((BN_mod_inverse(&Ri,R,&mont->N,ctx)) == NULL)
+               if ((BN_mod_inverse(Ri,R,&mont->N,ctx)) == NULL)
                        goto err;
-               if (!BN_lshift(&Ri,&Ri,mont->ri)) goto err; /* R*Ri */
-               if (!BN_sub_word(&Ri,1)) goto err;
+               if (!BN_lshift(Ri,Ri,mont->ri)) goto err; /* R*Ri */
+               if (!BN_sub_word(Ri,1)) goto err;
                                                        /* Ni = (R*Ri-1) / N */
-               if (!BN_div(&(mont->Ni),NULL,&Ri,&mont->N,ctx)) goto err;
-               BN_free(&Ri);
+               if (!BN_div(&(mont->Ni),NULL,Ri,&mont->N,ctx)) goto err;
                }
 #endif
 
@@ -332,9 +332,10 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
        if (!BN_set_bit(&(mont->RR),mont->ri*2)) goto err;
        if (!BN_mod(&(mont->RR),&(mont->RR),&(mont->N),ctx)) goto err;
 
-       return(1);
+       ret = 1;
 err:
-       return(0);
+       BN_CTX_end(ctx);
+       return ret;
        }
 
 BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to, BN_MONT_CTX *from)