New functions BN_CTX_start(), BN_CTX_get(), BN_CTX_end() to access

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

diff --git a/crypto/bn/bn_recp.c b/crypto/bn/bn_recp.c
index c1b0e230ea270193be9633a14c35e548dfec85e3..e1919e3ce68586a863603bc5a57a09c90022ec08 100644 (file)
--- a/crypto/bn/bn_recp.c
+++ b/crypto/bn/bn_recp.c
@@ -106,7 +106,8 @@ int BN_mod_mul_reciprocal(BIGNUM *r, BIGNUM *x, BIGNUM *y, BN_RECP_CTX *recp,
        int ret=0;
        BIGNUM *a;
 
-       a= &(ctx->bn[ctx->tos++]);
+       BN_CTX_start(ctx);
+       if ((a = BN_CTX_get(ctx)) == NULL) goto err;
        if (y != NULL)
                {
                if (x == y)
@@ -120,33 +121,34 @@ int BN_mod_mul_reciprocal(BIGNUM *r, BIGNUM *x, BIGNUM *y, BN_RECP_CTX *recp,
        BN_div_recp(NULL,r,a,recp,ctx);
        ret=1;
 err:
-       ctx->tos--;
+       BN_CTX_end(ctx);
        return(ret);
        }
 
 int BN_div_recp(BIGNUM *dv, BIGNUM *rem, BIGNUM *m, BN_RECP_CTX *recp,
             BN_CTX *ctx)
        {
-       int i,j,tos,ret=0,ex;
+       int i,j,ret=0,ex;
        BIGNUM *a,*b,*d,*r;
 
-       tos=ctx->tos;
-       a= &(ctx->bn[ctx->tos++]);
-       b= &(ctx->bn[ctx->tos++]);
+       BN_CTX_start(ctx);
+       a=BN_CTX_get(ctx);
+       b=BN_CTX_get(ctx);
        if (dv != NULL)
                d=dv;
        else
-               d= &(ctx->bn[ctx->tos++]);
+               d=BN_CTX_get(ctx);
        if (rem != NULL)
                r=rem;
        else
-               r= &(ctx->bn[ctx->tos++]);
+               r=BN_CTX_get(ctx);
+       if (a == NULL || b == NULL || d == NULL || r == NULL) goto err;
 
        if (BN_ucmp(m,&(recp->N)) < 0)
                {
                BN_zero(d);
                BN_copy(r,m);
-               ctx->tos=tos;
+               BN_CTX_end(ctx);
                return(1);
                }
 
@@ -200,7 +202,7 @@ int BN_div_recp(BIGNUM *dv, BIGNUM *rem, BIGNUM *m, BN_RECP_CTX *recp,
        d->neg=m->neg^recp->N.neg;
        ret=1;
 err:
-       ctx->tos=tos;
+       BN_CTX_end(ctx);
        return(ret);
        }