diff options
| author | Ulf Möller <ulf@openssl.org> | 2000-02-05 14:17:32 +0000 |
|---|---|---|
| committer | Ulf Möller <ulf@openssl.org> | 2000-02-05 14:17:32 +0000 |
| commit | 9b141126d4b6f0636bc047e81b846c193ae26611 (patch) | |
| tree | c8786c99bfccc8b9899cad5c3aa30f29ada5e1b9 /crypto/bn/bn_sqr.c | |
| parent | 7e708ebee066d0308a335579b546326220dc8317 (diff) | |
New functions BN_CTX_start(), BN_CTX_get(), BN_CTX_end() to access
temporary BIGNUMs. BN_CTX still uses a fixed number of BIGNUMs, but
the BN_CTX implementation could now easily be changed.
Diffstat (limited to 'crypto/bn/bn_sqr.c')
| -rw-r--r-- | crypto/bn/bn_sqr.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/crypto/bn/bn_sqr.c b/crypto/bn/bn_sqr.c index 1874c14628..fe00c5f69a 100644 --- a/crypto/bn/bn_sqr.c +++ b/crypto/bn/bn_sqr.c @@ -65,14 +65,13 @@ int BN_sqr(BIGNUM *r, BIGNUM *a, BN_CTX *ctx) { int max,al; + int ret = 0; BIGNUM *tmp,*rr; #ifdef BN_COUNT printf("BN_sqr %d * %d\n",a->top,a->top); #endif bn_check_top(a); - tmp= &(ctx->bn[ctx->tos]); - rr=(a != r)?r: (&ctx->bn[ctx->tos+1]); al=a->top; if (al <= 0) @@ -81,8 +80,13 @@ printf("BN_sqr %d * %d\n",a->top,a->top); return(1); } + BN_CTX_start(ctx); + rr=(a != r) ? r : BN_CTX_get(ctx); + tmp=BN_CTX_get(ctx); + if (tmp == NULL) goto err; + max=(al+al); - if (bn_wexpand(rr,max+1) == NULL) return(0); + if (bn_wexpand(rr,max+1) == NULL) goto err; r->neg=0; if (al == 4) @@ -120,18 +124,18 @@ printf("BN_sqr %d * %d\n",a->top,a->top); k=j+j; if (al == j) { - if (bn_wexpand(a,k*2) == NULL) return(0); - if (bn_wexpand(tmp,k*2) == NULL) return(0); + if (bn_wexpand(a,k*2) == NULL) goto err; + if (bn_wexpand(tmp,k*2) == NULL) goto err; bn_sqr_recursive(rr->d,a->d,al,tmp->d); } else { - if (bn_wexpand(tmp,max) == NULL) return(0); + if (bn_wexpand(tmp,max) == NULL) goto err; bn_sqr_normal(rr->d,a->d,al,tmp->d); } } #else - if (bn_wexpand(tmp,max) == NULL) return(0); + if (bn_wexpand(tmp,max) == NULL) goto err; bn_sqr_normal(rr->d,a->d,al,tmp->d); #endif } @@ -139,7 +143,10 @@ printf("BN_sqr %d * %d\n",a->top,a->top); rr->top=max; if ((max > 0) && (rr->d[max-1] == 0)) rr->top--; if (rr != r) BN_copy(r,rr); - return(1); + ret = 1; + err: + BN_CTX_end(ctx); + return(ret); } /* tmp must have 2*n words */ |