diff options
Diffstat (limited to 'openssl/crypto/bn/bn_word.c')
| -rw-r--r-- | openssl/crypto/bn/bn_word.c | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/openssl/crypto/bn/bn_word.c b/openssl/crypto/bn/bn_word.c index ee7b87c45..de83a15b9 100644 --- a/openssl/crypto/bn/bn_word.c +++ b/openssl/crypto/bn/bn_word.c @@ -144,26 +144,17 @@ int BN_add_word(BIGNUM *a, BN_ULONG w) a->neg=!(a->neg); return(i); } - /* Only expand (and risk failing) if it's possibly necessary */ - if (((BN_ULONG)(a->d[a->top - 1] + 1) == 0) && - (bn_wexpand(a,a->top+1) == NULL)) - return(0); - i=0; - for (;;) + for (i=0;w!=0 && i<a->top;i++) { - if (i >= a->top) - l=w; - else - l=(a->d[i]+w)&BN_MASK2; - a->d[i]=l; - if (w > l) - w=1; - else - break; - i++; + a->d[i] = l = (a->d[i]+w)&BN_MASK2; + w = (w>l)?1:0; } - if (i >= a->top) + if (w && i==a->top) + { + if (bn_wexpand(a,a->top+1) == NULL) return 0; a->top++; + a->d[i]=w; + } bn_check_top(a); return(1); } |