* Changes imported from Dropbear 0.47.

* bn_mp_clear.c is changed so that some vars are volatile,
so that the compiler won't optimise away

--HG--
branch : libtommath-dropbear
extra : convert_revision : 6c790cad5a7fa866ad062cb3a0c279f7ba788583

Makefile.in

@@ -5,16 +5,22 @@
 #version of library 
 VERSION=0.35
 
-CFLAGS  +=  -I./ -Wall -W -Wshadow -Wsign-compare
+VPATH=@srcdir@
+srcdir=@srcdir@
+
+# Dropbear takes flags from the toplevel makefile
+CFLAGS += -I$(srcdir)
+
+#CFLAGS  +=  -I./ -Wall -W -Wshadow -Wsign-compare
 
 #for speed 
-CFLAGS += -O3 -funroll-all-loops
+#CFLAGS += -O3 -funroll-all-loops
 
 #for size 
 #CFLAGS += -Os
 
 #x86 optimizations [should be valid for any GCC install though]
-CFLAGS  += -fomit-frame-pointer
+#CFLAGS  += -fomit-frame-pointer
 
 #debug
 #CFLAGS += -g3
@@ -67,7 +73,7 @@ bn_mp_to_signed_bin_n.o bn_mp_to_unsigned_bin_n.o
 
 libtommath.a:  $(OBJECTS)
 	$(AR) $(ARFLAGS) libtommath.a $(OBJECTS)
-	ranlib libtommath.a
+	$(RANLIB) libtommath.a
 
 #make a profiled library (takes a while!!!)
 #
@@ -146,10 +152,10 @@ pretty:
 
 clean:
 	rm -f *.bat *.pdf *.o *.a *.obj *.lib *.exe *.dll etclib/*.o demo/demo.o test ltmtest mpitest mtest/mtest mtest/mtest.exe \
-        *.idx *.toc *.log *.aux *.dvi *.lof *.ind *.ilg *.ps *.log *.s mpi.c *.da *.dyn *.dpi tommath.tex `find -type f | grep [~] | xargs` *.lo *.la
+        *.idx *.toc *.log *.aux *.dvi *.lof *.ind *.ilg *.ps *.log *.s mpi.c *.da *.dyn *.dpi tommath.tex *.lo *.la
 	rm -rf .libs
-	cd etc ; make clean
-	cd pics ; make clean
+	cd etc && make clean
+	cd pics && make clean
 
 zipup: clean manual poster docs
 	perl gen.pl ; mv mpi.c pre_gen/ ; \

bn.ilg

@@ -1,6 +0,0 @@
-This is makeindex, version 2.14 [02-Oct-2002] (kpathsea + Thai support).
-Scanning input file bn.idx....done (79 entries accepted, 0 rejected).
-Sorting entries....done (511 comparisons).
-Generating output file bn.ind....done (82 lines written, 0 warnings).
-Output written in bn.ind.
-Transcript written in bn.ilg.

bn.ind

@@ -1,82 +0,0 @@
-\begin{theindex}
-
-  \item mp\_add, \hyperpage{29}
-  \item mp\_add\_d, \hyperpage{52}
-  \item mp\_and, \hyperpage{29}
-  \item mp\_clear, \hyperpage{11}
-  \item mp\_clear\_multi, \hyperpage{12}
-  \item mp\_cmp, \hyperpage{24}
-  \item mp\_cmp\_d, \hyperpage{25}
-  \item mp\_cmp\_mag, \hyperpage{23}
-  \item mp\_div, \hyperpage{30}
-  \item mp\_div\_2, \hyperpage{26}
-  \item mp\_div\_2d, \hyperpage{28}
-  \item mp\_div\_d, \hyperpage{52}
-  \item mp\_dr\_reduce, \hyperpage{40}
-  \item mp\_dr\_setup, \hyperpage{40}
-  \item MP\_EQ, \hyperpage{22}
-  \item mp\_error\_to\_string, \hyperpage{10}
-  \item mp\_expt\_d, \hyperpage{43}
-  \item mp\_exptmod, \hyperpage{43}
-  \item mp\_exteuclid, \hyperpage{51}
-  \item mp\_gcd, \hyperpage{51}
-  \item mp\_get\_int, \hyperpage{20}
-  \item mp\_grow, \hyperpage{16}
-  \item MP\_GT, \hyperpage{22}
-  \item mp\_init, \hyperpage{11}
-  \item mp\_init\_copy, \hyperpage{13}
-  \item mp\_init\_multi, \hyperpage{12}
-  \item mp\_init\_set, \hyperpage{21}
-  \item mp\_init\_set\_int, \hyperpage{21}
-  \item mp\_init\_size, \hyperpage{14}
-  \item mp\_int, \hyperpage{10}
-  \item mp\_invmod, \hyperpage{52}
-  \item mp\_jacobi, \hyperpage{52}
-  \item mp\_lcm, \hyperpage{51}
-  \item mp\_lshd, \hyperpage{28}
-  \item MP\_LT, \hyperpage{22}
-  \item MP\_MEM, \hyperpage{9}
-  \item mp\_mod, \hyperpage{35}
-  \item mp\_mod\_d, \hyperpage{52}
-  \item mp\_montgomery\_calc\_normalization, \hyperpage{38}
-  \item mp\_montgomery\_reduce, \hyperpage{37}
-  \item mp\_montgomery\_setup, \hyperpage{37}
-  \item mp\_mul, \hyperpage{31}
-  \item mp\_mul\_2, \hyperpage{26}
-  \item mp\_mul\_2d, \hyperpage{28}
-  \item mp\_mul\_d, \hyperpage{52}
-  \item mp\_n\_root, \hyperpage{44}
-  \item mp\_neg, \hyperpage{29}
-  \item MP\_NO, \hyperpage{9}
-  \item MP\_OKAY, \hyperpage{9}
-  \item mp\_or, \hyperpage{29}
-  \item mp\_prime\_fermat, \hyperpage{45}
-  \item mp\_prime\_is\_divisible, \hyperpage{45}
-  \item mp\_prime\_is\_prime, \hyperpage{46}
-  \item mp\_prime\_miller\_rabin, \hyperpage{45}
-  \item mp\_prime\_next\_prime, \hyperpage{46}
-  \item mp\_prime\_rabin\_miller\_trials, \hyperpage{46}
-  \item mp\_prime\_random, \hyperpage{47}
-  \item mp\_prime\_random\_ex, \hyperpage{47}
-  \item mp\_radix\_size, \hyperpage{49}
-  \item mp\_read\_radix, \hyperpage{49}
-  \item mp\_read\_unsigned\_bin, \hyperpage{50}
-  \item mp\_reduce, \hyperpage{36}
-  \item mp\_reduce\_2k, \hyperpage{41}
-  \item mp\_reduce\_2k\_setup, \hyperpage{41}
-  \item mp\_reduce\_setup, \hyperpage{36}
-  \item mp\_rshd, \hyperpage{28}
-  \item mp\_set, \hyperpage{19}
-  \item mp\_set\_int, \hyperpage{20}
-  \item mp\_shrink, \hyperpage{15}
-  \item mp\_sqr, \hyperpage{33}
-  \item mp\_sub, \hyperpage{29}
-  \item mp\_sub\_d, \hyperpage{52}
-  \item mp\_to\_unsigned\_bin, \hyperpage{50}
-  \item mp\_toradix, \hyperpage{49}
-  \item mp\_unsigned\_bin\_size, \hyperpage{50}
-  \item MP\_VAL, \hyperpage{9}
-  \item mp\_xor, \hyperpage{29}
-  \item MP\_YES, \hyperpage{9}
-
-\end{theindex}

bn_mp_clear.c

@@ -19,14 +19,17 @@
 void
 mp_clear (mp_int * a)
 {
-  int i;
+  volatile mp_digit *p;
+  int len;
 
   /* only do anything if a hasn't been freed previously */
   if (a->dp != NULL) {
     /* first zero the digits */
-    for (i = 0; i < a->used; i++) {
-        a->dp[i] = 0;
-    }
+	len = a->alloc;
+	p = a->dp;
+	while (len--) {
+		*p++ = 0;
+	}
 
     /* free ram */
     XFREE(a->dp);

tommath_class.h

@@ -992,3 +992,9 @@
 #else
 #define LTM_LAST
 #endif
+
+/* Dropbear doesn't need these. */
+#undef BN_MP_KARATSUBA_MUL_C
+#undef BN_MP_KARATSUBA_SQR_C
+#undef BN_MP_TOOM_MUL_C
+#undef BN_MP_TOOM_SQR_C