Commit 33d4e690 authored by Bodo Möller's avatar Bodo Möller
Browse files

fix bn_expand2

parent 848c8495

crypto/bn/bn_lib.c

+11 −8
Original line number Diff line number Diff line
@@ -425,7 +425,7 @@ BIGNUM *bn_dup_expand(const BIGNUM *b, int words) 


/* This is an internal function that should not be used in applications.

 * It ensures that 'b' has enough room for a 'words' word number

 * and initialises the unused part of b->d with leading zeros.

 * and initialises any unused part of b->d with leading zeros.

 * It is mostly used by the various BIGNUM routines. If there is an error,

 * NULL is returned. If not, 'b' is returned. */
@@ -450,6 +450,8 @@ BIGNUM *bn_expand2(BIGNUM *b, int words) 
		}

	

	/* NB: bn_wexpand() calls this only if the BIGNUM really has to grow */

	if ((b != NULL) && (b->top < b->dmax))

		{

		A = &(b->d[b->top]);

		for (i=(words - b->top)>>3; i>0; i--,A+=8)

			{
@@ -458,6 +460,7 @@ BIGNUM *bn_expand2(BIGNUM *b, int words) 
			}

		for (i=(words - b->top)&7; i>0; i--,A++)

			A[0]=0;

		}

		

	return b;

	}