www.usr.com/support/gpl/USR9107_release.1.4.tar.gz

[bcm963xx.git] / userapps / opensource / sshd / libtommath / bn_mp_read_signed_bin.c

diff --git a/userapps/opensource/sshd/libtommath/bn_mp_read_signed_bin.c b/userapps/opensource/sshd/libtommath/bn_mp_read_signed_bin.c
index 448e327..814d6c1 100755 (executable)
--- a/userapps/opensource/sshd/libtommath/bn_mp_read_signed_bin.c
+++ b/userapps/opensource/sshd/libtommath/bn_mp_read_signed_bin.c
@@ -1,9 +1,11 @@
+#include <tommath.h>
+#ifdef BN_MP_READ_SIGNED_BIN_C
 /* LibTomMath, multiple-precision integer library -- Tom St Denis
  *
- * LibTomMath is library that provides for multiple-precision
+ * LibTomMath is a library that provides multiple-precision
  * integer arithmetic as well as number theoretic functionality.
  *
- * The library is designed directly after the MPI library by
+ * The library was designed directly after the MPI library by
  * Michael Fromberger but has been written from scratch with
  * additional optimizations in place.
  *
@@ -12,7 +14,6 @@
  *
  * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org
  */
-#include <tommath.h>
 
 /* read signed bin, big endian, first byte is 0==positive or 1==negative */
 int
@@ -20,9 +21,18 @@ mp_read_signed_bin (mp_int * a, unsigned char *b, int c)
 {
   int     res;
 
+  /* read magnitude */
   if ((res = mp_read_unsigned_bin (a, b + 1, c - 1)) != MP_OKAY) {
     return res;
   }
-  a->sign = ((b[0] == (unsigned char) 0) ? MP_ZPOS : MP_NEG);
+
+  /* first byte is 0 for positive, non-zero for negative */
+  if (b[0] == 0) {
+     a->sign = MP_ZPOS;
+  } else {
+     a->sign = MP_NEG;
+  }
+
   return MP_OKAY;
 }
+#endif