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

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

diff --git a/userapps/opensource/sshd/libtommath/bn_mp_read_unsigned_bin.c b/userapps/opensource/sshd/libtommath/bn_mp_read_unsigned_bin.c
index 378d1fa..946457d 100755 (executable)
--- a/userapps/opensource/sshd/libtommath/bn_mp_read_unsigned_bin.c
+++ b/userapps/opensource/sshd/libtommath/bn_mp_read_unsigned_bin.c
@@ -1,9 +1,11 @@
+#include <tommath.h>
+#ifdef BN_MP_READ_UNSIGNED_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.
  *
@@ -12,28 +14,39 @@
  *
  * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org
  */
-#include <tommath.h>
 
 /* reads a unsigned char array, assumes the msb is stored first [big endian] */
 int
 mp_read_unsigned_bin (mp_int * a, unsigned char *b, int c)
 {
   int     res;
+
+  /* make sure there are at least two digits */
+  if (a->alloc < 2) {
+     if ((res = mp_grow(a, 2)) != MP_OKAY) {
+        return res;
+     }
+  }
+
+  /* zero the int */
   mp_zero (a);
+
+  /* read the bytes in */
   while (c-- > 0) {
     if ((res = mp_mul_2d (a, 8, a)) != MP_OKAY) {
       return res;
     }
 
-    if (DIGIT_BIT != 7) {
+#ifndef MP_8BIT
       a->dp[0] |= *b++;
       a->used += 1;
-    } else {
+#else
       a->dp[0] = (*b & MP_MASK);
       a->dp[1] |= ((*b++ >> 7U) & 1);
       a->used += 2;
-    }
+#endif
   }
   mp_clamp (a);
   return MP_OKAY;
 }
+#endif