Run util/openssl-format-source -v -c .

Reviewed-by: Tim Hudson <tjh@openssl.org>

1 files changed, 970 insertions, 992 deletions

diff --git a/crypto/bn/bn_mul.c b/crypto/bn/bn_mul.c
index a98e6078c8..f681fa58b8 100644
--- a/crypto/bn/bn_mul.c
+++ b/crypto/bn/bn_mul.c
@@ -5,21 +5,21 @@
  * This package is an SSL implementation written
  * by Eric Young (eay@cryptsoft.com).
  * The implementation was written so as to conform with Netscapes SSL.
- * 
+ *
  * This library is free for commercial and non-commercial use as long as
  * the following conditions are aheared to.  The following conditions
  * apply to all code found in this distribution, be it the RC4, RSA,
  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  * included with this distribution is covered by the same copyright terms
  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
+ *
  * Copyright remains Eric Young's, and as such any Copyright notices in
  * the code are not to be removed.
  * If this package is used in a product, Eric Young should be given attribution
  * as the author of the parts of the library used.
  * This can be in the form of a textual message at program startup or
  * in documentation (online or textual) provided with the package.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ -34,10 +34,10 @@
  *     Eric Young (eay@cryptsoft.com)"
  *    The word 'cryptographic' can be left out if the rouines from the library
  *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
+ * 4. If you include any Windows specific code (or a derivative thereof) from
  *    the apps directory (application code) you must include an acknowledgement:
  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +49,7 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- * 
+ *
  * The licence and distribution terms for any publically available version or
  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  * copied and put under another distribution licence
@@ -57,7 +57,7 @@
  */
 
 #ifndef BN_DEBUG
-# undef NDEBUG /* avoid conflicting definitions */
+# undef NDEBUG                  /* avoid conflicting definitions */
 # define NDEBUG
 #endif
 
@@ -66,287 +66,311 @@
 #include "bn_lcl.h"
 
 #if defined(OPENSSL_NO_ASM) || !defined(OPENSSL_BN_ASM_PART_WORDS)
-/* Here follows specialised variants of bn_add_words() and
-   bn_sub_words().  They have the property performing operations on
-   arrays of different sizes.  The sizes of those arrays is expressed through
-   cl, which is the common length ( basicall, min(len(a),len(b)) ), and dl,
-   which is the delta between the two lengths, calculated as len(a)-len(b).
-   All lengths are the number of BN_ULONGs...  For the operations that require
-   a result array as parameter, it must have the length cl+abs(dl).
-   These functions should probably end up in bn_asm.c as soon as there are
-   assembler counterparts for the systems that use assembler files.  */
+/*
+ * Here follows specialised variants of bn_add_words() and bn_sub_words().
+ * They have the property performing operations on arrays of different sizes.
+ * The sizes of those arrays is expressed through cl, which is the common
+ * length ( basicall, min(len(a),len(b)) ), and dl, which is the delta
+ * between the two lengths, calculated as len(a)-len(b). All lengths are the
+ * number of BN_ULONGs...  For the operations that require a result array as
+ * parameter, it must have the length cl+abs(dl). These functions should
+ * probably end up in bn_asm.c as soon as there are assembler counterparts
+ * for the systems that use assembler files.
+ */
 
 BN_ULONG bn_sub_part_words(BN_ULONG *r,
-	const BN_ULONG *a, const BN_ULONG *b,
-	int cl, int dl)
-	{
-	BN_ULONG c, t;
-
-	assert(cl >= 0);
-	c = bn_sub_words(r, a, b, cl);
-
-	if (dl == 0)
-		return c;
-
-	r += cl;
-	a += cl;
-	b += cl;
-
-	if (dl < 0)
-		{
-		for (;;)
-			{
-			t = b[0];
-			r[0] = (0-t-c)&BN_MASK2;
-			if (t != 0) c=1;
-			if (++dl >= 0) break;
-
-			t = b[1];
-			r[1] = (0-t-c)&BN_MASK2;
-			if (t != 0) c=1;
-			if (++dl >= 0) break;
-
-			t = b[2];
-			r[2] = (0-t-c)&BN_MASK2;
-			if (t != 0) c=1;
-			if (++dl >= 0) break;
-
-			t = b[3];
-			r[3] = (0-t-c)&BN_MASK2;
-			if (t != 0) c=1;
-			if (++dl >= 0) break;
-
-			b += 4;
-			r += 4;
-			}
-		}
-	else
-		{
-		int save_dl = dl;
-		while(c)
-			{
-			t = a[0];
-			r[0] = (t-c)&BN_MASK2;
-			if (t != 0) c=0;
-			if (--dl <= 0) break;
-
-			t = a[1];
-			r[1] = (t-c)&BN_MASK2;
-			if (t != 0) c=0;
-			if (--dl <= 0) break;
-
-			t = a[2];
-			r[2] = (t-c)&BN_MASK2;
-			if (t != 0) c=0;
-			if (--dl <= 0) break;
-
-			t = a[3];
-			r[3] = (t-c)&BN_MASK2;
-			if (t != 0) c=0;
-			if (--dl <= 0) break;
-
-			save_dl = dl;
-			a += 4;
-			r += 4;
-			}
-		if (dl > 0)
-			{
-			if (save_dl > dl)
-				{
-				switch (save_dl - dl)
-					{
-				case 1:
-					r[1] = a[1];
-					if (--dl <= 0) break;
-				case 2:
-					r[2] = a[2];
-					if (--dl <= 0) break;
-				case 3:
-					r[3] = a[3];
-					if (--dl <= 0) break;
-					}
-				a += 4;
-				r += 4;
-				}
-			}
-		if (dl > 0)
-			{
-			for(;;)
-				{
-				r[0] = a[0];
-				if (--dl <= 0) break;
-				r[1] = a[1];
-				if (--dl <= 0) break;
-				r[2] = a[2];
-				if (--dl <= 0) break;
-				r[3] = a[3];
-				if (--dl <= 0) break;
-
-				a += 4;
-				r += 4;
-				}
-			}
-		}
-	return c;
-	}
+                           const BN_ULONG *a, const BN_ULONG *b,
+                           int cl, int dl)
+{
+    BN_ULONG c, t;
+
+    assert(cl >= 0);
+    c = bn_sub_words(r, a, b, cl);
+
+    if (dl == 0)
+        return c;
+
+    r += cl;
+    a += cl;
+    b += cl;
+
+    if (dl < 0) {
+        for (;;) {
+            t = b[0];
+            r[0] = (0 - t - c) & BN_MASK2;
+            if (t != 0)
+                c = 1;
+            if (++dl >= 0)
+                break;
+
+            t = b[1];
+            r[1] = (0 - t - c) & BN_MASK2;
+            if (t != 0)
+                c = 1;
+            if (++dl >= 0)
+                break;
+
+            t = b[2];
+            r[2] = (0 - t - c) & BN_MASK2;
+            if (t != 0)
+                c = 1;
+            if (++dl >= 0)
+                break;
+
+            t = b[3];
+            r[3] = (0 - t - c) & BN_MASK2;
+            if (t != 0)
+                c = 1;
+            if (++dl >= 0)
+                break;
+
+            b += 4;
+            r += 4;
+        }
+    } else {
+        int save_dl = dl;
+        while (c) {
+            t = a[0];
+            r[0] = (t - c) & BN_MASK2;
+            if (t != 0)
+                c = 0;
+            if (--dl <= 0)
+                break;
+
+            t = a[1];
+            r[1] = (t - c) & BN_MASK2;
+            if (t != 0)
+                c = 0;
+            if (--dl <= 0)
+                break;
+
+            t = a[2];
+            r[2] = (t - c) & BN_MASK2;
+            if (t != 0)
+                c = 0;
+            if (--dl <= 0)
+                break;
+
+            t = a[3];
+            r[3] = (t - c) & BN_MASK2;
+            if (t != 0)
+                c = 0;
+            if (--dl <= 0)
+                break;
+
+            save_dl = dl;
+            a += 4;
+            r += 4;
+        }
+        if (dl > 0) {
+            if (save_dl > dl) {
+                switch (save_dl - dl) {
+                case 1:
+                    r[1] = a[1];
+                    if (--dl <= 0)
+                        break;
+                case 2:
+                    r[2] = a[2];
+                    if (--dl <= 0)
+                        break;
+                case 3:
+                    r[3] = a[3];
+                    if (--dl <= 0)
+                        break;
+                }
+                a += 4;
+                r += 4;
+            }
+        }
+        if (dl > 0) {
+            for (;;) {
+                r[0] = a[0];
+                if (--dl <= 0)
+                    break;
+                r[1] = a[1];
+                if (--dl <= 0)
+                    break;
+                r[2] = a[2];
+                if (--dl <= 0)
+                    break;
+                r[3] = a[3];
+                if (--dl <= 0)
+                    break;
+
+                a += 4;
+                r += 4;
+            }
+        }
+    }
+    return c;
+}
 #endif
 
 BN_ULONG bn_add_part_words(BN_ULONG *r,
-	const BN_ULONG *a, const BN_ULONG *b,
-	int cl, int dl)
-	{
-	BN_ULONG c, l, t;
-
-	assert(cl >= 0);
-	c = bn_add_words(r, a, b, cl);
-
-	if (dl == 0)
-		return c;
-
-	r += cl;
-	a += cl;
-	b += cl;
-
-	if (dl < 0)
-		{
-		int save_dl = dl;
-		while (c)
-			{
-			l=(c+b[0])&BN_MASK2;
-			c=(l < c);
-			r[0]=l;
-			if (++dl >= 0) break;
-
-			l=(c+b[1])&BN_MASK2;
-			c=(l < c);
-			r[1]=l;
-			if (++dl >= 0) break;
-
-			l=(c+b[2])&BN_MASK2;
-			c=(l < c);
-			r[2]=l;
-			if (++dl >= 0) break;
-
-			l=(c+b[3])&BN_MASK2;
-			c=(l < c);
-			r[3]=l;
-			if (++dl >= 0) break;
-
-			save_dl = dl;
-			b+=4;
-			r+=4;
-			}
-		if (dl < 0)
-			{
-			if (save_dl < dl)
-				{
-				switch (dl - save_dl)
-					{
-				case 1:
-					r[1] = b[1];
-					if (++dl >= 0) break;
-				case 2:
-					r[2] = b[2];
-					if (++dl >= 0) break;
-				case 3:
-					r[3] = b[3];
-					if (++dl >= 0) break;
-					}
-				b += 4;
-				r += 4;
-				}
-			}
-		if (dl < 0)
-			{
-			for(;;)
-				{
-				r[0] = b[0];
-				if (++dl >= 0) break;
-				r[1] = b[1];
-				if (++dl >= 0) break;
-				r[2] = b[2];
-				if (++dl >= 0) break;
-				r[3] = b[3];
-				if (++dl >= 0) break;
-
-				b += 4;
-				r += 4;
-				}
-			}
-		}
-	else
-		{
-		int save_dl = dl;
-		while (c)
-			{
-			t=(a[0]+c)&BN_MASK2;
-			c=(t < c);
-			r[0]=t;
-			if (--dl <= 0) break;
-
-			t=(a[1]+c)&BN_MASK2;
-			c=(t < c);
-			r[1]=t;
-			if (--dl <= 0) break;
-
-			t=(a[2]+c)&BN_MASK2;
-			c=(t < c);
-			r[2]=t;
-			if (--dl <= 0) break;
-
-			t=(a[3]+c)&BN_MASK2;
-			c=(t < c);
-			r[3]=t;
-			if (--dl <= 0) break;
-
-			save_dl = dl;
-			a+=4;
-			r+=4;
-			}
-		if (dl > 0)
-			{
-			if (save_dl > dl)
-				{
-				switch (save_dl - dl)
-					{
-				case 1:
-					r[1] = a[1];
-					if (--dl <= 0) break;
-				case 2:
-					r[2] = a[2];
-					if (--dl <= 0) break;
-				case 3:
-					r[3] = a[3];
-					if (--dl <= 0) break;
-					}
-				a += 4;
-				r += 4;
-				}
-			}
-		if (dl > 0)
-			{
-			for(;;)
-				{
-				r[0] = a[0];
-				if (--dl <= 0) break;
-				r[1] = a[1];
-				if (--dl <= 0) break;
-				r[2] = a[2];
-				if (--dl <= 0) break;
-				r[3] = a[3];
-				if (--dl <= 0) break;
-
-				a += 4;
-				r += 4;
-				}
-			}
-		}
-	return c;
-	}
+                           const BN_ULONG *a, const BN_ULONG *b,
+                           int cl, int dl)
+{
+    BN_ULONG c, l, t;
+
+    assert(cl >= 0);
+    c = bn_add_words(r, a, b, cl);
+
+    if (dl == 0)
+        return c;
+
+    r += cl;
+    a += cl;
+    b += cl;
+
+    if (dl < 0) {
+        int save_dl = dl;
+        while (c) {
+            l = (c + b[0]) & BN_MASK2;
+            c = (l < c);
+            r[0] = l;
+            if (++dl >= 0)
+                break;
+
+            l = (c + b[1]) & BN_MASK2;
+            c = (l < c);
+            r[1] = l;
+            if (++dl >= 0)
+                break;
+
+            l = (c + b[2]) & BN_MASK2;
+            c = (l < c);
+            r[2] = l;
+            if (++dl >= 0)
+                break;
+
+            l = (c + b[3]) & BN_MASK2;
+            c = (l < c);
+            r[3] = l;
+            if (++dl >= 0)
+                break;
+
+            save_dl = dl;
+            b += 4;
+            r += 4;
+        }
+        if (dl < 0) {
+            if (save_dl < dl) {
+                switch (dl - save_dl) {
+                case 1:
+                    r[1] = b[1];
+                    if (++dl >= 0)
+                        break;
+                case 2:
+                    r[2] = b[2];
+                    if (++dl >= 0)
+                        break;
+                case 3:
+                    r[3] = b[3];
+                    if (++dl >= 0)
+                        break;
+                }
+                b += 4;
+                r += 4;
+            }
+        }
+        if (dl < 0) {
+            for (;;) {
+                r[0] = b[0];
+                if (++dl >= 0)
+                    break;
+                r[1] = b[1];
+                if (++dl >= 0)
+                    break;
+                r[2] = b[2];
+                if (++dl >= 0)
+                    break;
+                r[3] = b[3];
+                if (++dl >= 0)
+                    break;
+
+                b += 4;
+                r += 4;
+            }
+        }
+    } else {
+        int save_dl = dl;
+        while (c) {
+            t = (a[0] + c) & BN_MASK2;
+            c = (t < c);
+            r[0] = t;
+            if (--dl <= 0)
+                break;
+
+            t = (a[1] + c) & BN_MASK2;
+            c = (t < c);
+            r[1] = t;
+            if (--dl <= 0)
+                break;
+
+            t = (a[2] + c) & BN_MASK2;
+            c = (t < c);
+            r[2] = t;
+            if (--dl <= 0)
+                break;
+
+            t = (a[3] + c) & BN_MASK2;
+            c = (t < c);
+            r[3] = t;
+            if (--dl <= 0)
+                break;
+
+            save_dl = dl;
+            a += 4;
+            r += 4;
+        }
+        if (dl > 0) {
+            if (save_dl > dl) {
+                switch (save_dl - dl) {
+                case 1:
+                    r[1] = a[1];
+                    if (--dl <= 0)
+                        break;
+                case 2:
+                    r[2] = a[2];
+                    if (--dl <= 0)
+                        break;
+                case 3:
+                    r[3] = a[3];
+                    if (--dl <= 0)
+                        break;
+                }
+                a += 4;
+                r += 4;
+            }
+        }
+        if (dl > 0) {
+            for (;;) {
+                r[0] = a[0];
+                if (--dl <= 0)
+                    break;
+                r[1] = a[1];
+                if (--dl <= 0)
+                    break;
+                r[2] = a[2];
+                if (--dl <= 0)
+                    break;
+                r[3] = a[3];
+                if (--dl <= 0)
+                    break;
+
+                a += 4;
+                r += 4;
+            }
+        }
+    }
+    return c;
+}
 
 #ifdef BN_RECURSION
-/* Karatsuba recursive multiplication algorithm
- * (cf. Knuth, The Art of Computer Programming, Vol. 2) */
+/*
+ * Karatsuba recursive multiplication algorithm (cf. Knuth, The Art of
+ * Computer Programming, Vol. 2)
+ */
 
 /*-
  * r is 2*n2 words in size,
@@ -361,357 +385,328 @@ BN_ULONG bn_add_part_words(BN_ULONG *r,
  */
 /* dnX may not be positive, but n2/2+dnX has to be */
 void bn_mul_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n2,
-	int dna, int dnb, BN_ULONG *t)
-	{
-	int n=n2/2,c1,c2;
-	int tna=n+dna, tnb=n+dnb;
-	unsigned int neg,zero;
-	BN_ULONG ln,lo,*p;
+                      int dna, int dnb, BN_ULONG *t)
+{
+    int n = n2 / 2, c1, c2;
+    int tna = n + dna, tnb = n + dnb;
+    unsigned int neg, zero;
+    BN_ULONG ln, lo, *p;
 
 # ifdef BN_MUL_COMBA
 #  if 0
-	if (n2 == 4)
-		{
-		bn_mul_comba4(r,a,b);
-		return;
-		}
+    if (n2 == 4) {
+        bn_mul_comba4(r, a, b);
+        return;
+    }
 #  endif
-	/* Only call bn_mul_comba 8 if n2 == 8 and the
-	 * two arrays are complete [steve]
-	 */
-	if (n2 == 8 && dna == 0 && dnb == 0)
-		{
-		bn_mul_comba8(r,a,b);
-		return; 
-		}
-# endif /* BN_MUL_COMBA */
-	/* Else do normal multiply */
-	if (n2 < BN_MUL_RECURSIVE_SIZE_NORMAL)
-		{
-		bn_mul_normal(r,a,n2+dna,b,n2+dnb);
-		if ((dna + dnb) < 0)
-			memset(&r[2*n2 + dna + dnb], 0,
-				sizeof(BN_ULONG) * -(dna + dnb));
-		return;
-		}
-	/* r=(a[0]-a[1])*(b[1]-b[0]) */
-	c1=bn_cmp_part_words(a,&(a[n]),tna,n-tna);
-	c2=bn_cmp_part_words(&(b[n]),b,tnb,tnb-n);
-	zero=neg=0;
-	switch (c1*3+c2)
-		{
-	case -4:
-		bn_sub_part_words(t,      &(a[n]),a,      tna,tna-n); /* - */
-		bn_sub_part_words(&(t[n]),b,      &(b[n]),tnb,n-tnb); /* - */
-		break;
-	case -3:
-		zero=1;
-		break;
-	case -2:
-		bn_sub_part_words(t,      &(a[n]),a,      tna,tna-n); /* - */
-		bn_sub_part_words(&(t[n]),&(b[n]),b,      tnb,tnb-n); /* + */
-		neg=1;
-		break;
-	case -1:
-	case 0:
-	case 1:
-		zero=1;
-		break;
-	case 2:
-		bn_sub_part_words(t,      a,      &(a[n]),tna,n-tna); /* + */
-		bn_sub_part_words(&(t[n]),b,      &(b[n]),tnb,n-tnb); /* - */
-		neg=1;
-		break;
-	case 3:
-		zero=1;
-		break;
-	case 4:
-		bn_sub_part_words(t,      a,      &(a[n]),tna,n-tna);
-		bn_sub_part_words(&(t[n]),&(b[n]),b,      tnb,tnb-n);
-		break;
-		}
+    /*
+     * Only call bn_mul_comba 8 if n2 == 8 and the two arrays are complete
+     * [steve]
+     */
+    if (n2 == 8 && dna == 0 && dnb == 0) {
+        bn_mul_comba8(r, a, b);
+        return;
+    }
+# endif                         /* BN_MUL_COMBA */
+    /* Else do normal multiply */
+    if (n2 < BN_MUL_RECURSIVE_SIZE_NORMAL) {
+        bn_mul_normal(r, a, n2 + dna, b, n2 + dnb);
+        if ((dna + dnb) < 0)
+            memset(&r[2 * n2 + dna + dnb], 0,
+                   sizeof(BN_ULONG) * -(dna + dnb));
+        return;
+    }
+    /* r=(a[0]-a[1])*(b[1]-b[0]) */
+    c1 = bn_cmp_part_words(a, &(a[n]), tna, n - tna);
+    c2 = bn_cmp_part_words(&(b[n]), b, tnb, tnb - n);
+    zero = neg = 0;
+    switch (c1 * 3 + c2) {
+    case -4:
+        bn_sub_part_words(t, &(a[n]), a, tna, tna - n); /* - */
+        bn_sub_part_words(&(t[n]), b, &(b[n]), tnb, n - tnb); /* - */
+        break;
+    case -3:
+        zero = 1;
+        break;
+    case -2:
+        bn_sub_part_words(t, &(a[n]), a, tna, tna - n); /* - */
+        bn_sub_part_words(&(t[n]), &(b[n]), b, tnb, tnb - n); /* + */
+        neg = 1;
+        break;
+    case -1:
+    case 0:
+    case 1:
+        zero = 1;
+        break;
+    case 2:
+        bn_sub_part_words(t, a, &(a[n]), tna, n - tna); /* + */
+        bn_sub_part_words(&(t[n]), b, &(b[n]), tnb, n - tnb); /* - */
+        neg = 1;
+        break;
+    case 3:
+        zero = 1;
+        break;
+    case 4:
+        bn_sub_part_words(t, a, &(a[n]), tna, n - tna);
+        bn_sub_part_words(&(t[n]), &(b[n]), b, tnb, tnb - n);
+        break;
+    }
 
 # ifdef BN_MUL_COMBA
-	if (n == 4 && dna == 0 && dnb == 0) /* XXX: bn_mul_comba4 could take
-					       extra args to do this well */
-		{
-		if (!zero)
-			bn_mul_comba4(&(t[n2]),t,&(t[n]));
-		else
-			memset(&(t[n2]),0,8*sizeof(BN_ULONG));
-		
-		bn_mul_comba4(r,a,b);
-		bn_mul_comba4(&(r[n2]),&(a[n]),&(b[n]));
-		}
-	else if (n == 8 && dna == 0 && dnb == 0) /* XXX: bn_mul_comba8 could
-						    take extra args to do this
-						    well */
-		{
-		if (!zero)
-			bn_mul_comba8(&(t[n2]),t,&(t[n]));
-		else
-			memset(&(t[n2]),0,16*sizeof(BN_ULONG));
-		
-		bn_mul_comba8(r,a,b);
-		bn_mul_comba8(&(r[n2]),&(a[n]),&(b[n]));
-		}
-	else
-# endif /* BN_MUL_COMBA */
-		{
-		p= &(t[n2*2]);
-		if (!zero)
-			bn_mul_recursive(&(t[n2]),t,&(t[n]),n,0,0,p);
-		else
-			memset(&(t[n2]),0,n2*sizeof(BN_ULONG));
-		bn_mul_recursive(r,a,b,n,0,0,p);
-		bn_mul_recursive(&(r[n2]),&(a[n]),&(b[n]),n,dna,dnb,p);
-		}
-
-	/*-
-	 * t[32] holds (a[0]-a[1])*(b[1]-b[0]), c1 is the sign
-	 * r[10] holds (a[0]*b[0])
-	 * r[32] holds (b[1]*b[1])
-	 */
-
-	c1=(int)(bn_add_words(t,r,&(r[n2]),n2));
-
-	if (neg) /* if t[32] is negative */
-		{
-		c1-=(int)(bn_sub_words(&(t[n2]),t,&(t[n2]),n2));
-		}
-	else
-		{
-		/* Might have a carry */
-		c1+=(int)(bn_add_words(&(t[n2]),&(t[n2]),t,n2));
-		}
-
-	/*-
-	 * t[32] holds (a[0]-a[1])*(b[1]-b[0])+(a[0]*b[0])+(a[1]*b[1])
-	 * r[10] holds (a[0]*b[0])
-	 * r[32] holds (b[1]*b[1])
-	 * c1 holds the carry bits
-	 */
-	c1+=(int)(bn_add_words(&(r[n]),&(r[n]),&(t[n2]),n2));
-	if (c1)
-		{
-		p= &(r[n+n2]);
-		lo= *p;
-		ln=(lo+c1)&BN_MASK2;
-		*p=ln;
-
-		/* The overflow will stop before we over write
-		 * words we should not overwrite */
-		if (ln < (BN_ULONG)c1)
-			{
-			do	{
-				p++;
-				lo= *p;
-				ln=(lo+1)&BN_MASK2;
-				*p=ln;
-				} while (ln == 0);
-			}
-		}
-	}
-
-/* n+tn is the word length
- * t needs to be n*4 is size, as does r */
+    if (n == 4 && dna == 0 && dnb == 0) { /* XXX: bn_mul_comba4 could take
+                                           * extra args to do this well */
+        if (!zero)
+            bn_mul_comba4(&(t[n2]), t, &(t[n]));
+        else
+            memset(&(t[n2]), 0, 8 * sizeof(BN_ULONG));
+
+        bn_mul_comba4(r, a, b);
+        bn_mul_comba4(&(r[n2]), &(a[n]), &(b[n]));
+    } else if (n == 8 && dna == 0 && dnb == 0) { /* XXX: bn_mul_comba8 could
+                                                  * take extra args to do
+                                                  * this well */
+        if (!zero)
+            bn_mul_comba8(&(t[n2]), t, &(t[n]));
+        else
+            memset(&(t[n2]), 0, 16 * sizeof(BN_ULONG));
+
+        bn_mul_comba8(r, a, b);
+        bn_mul_comba8(&(r[n2]), &(a[n]), &(b[n]));
+    } else
+# endif                         /* BN_MUL_COMBA */
+    {
+        p = &(t[n2 * 2]);
+        if (!zero)
+            bn_mul_recursive(&(t[n2]), t, &(t[n]), n, 0, 0, p);
+        else
+            memset(&(t[n2]), 0, n2 * sizeof(BN_ULONG));
+        bn_mul_recursive(r, a, b, n, 0, 0, p);
+        bn_mul_recursive(&(r[n2]), &(a[n]), &(b[n]), n, dna, dnb, p);
+    }
+
+        /*-
+         * t[32] holds (a[0]-a[1])*(b[1]-b[0]), c1 is the sign
+         * r[10] holds (a[0]*b[0])
+         * r[32] holds (b[1]*b[1])
+         */
+
+    c1 = (int)(bn_add_words(t, r, &(r[n2]), n2));
+
+    if (neg) {                  /* if t[32] is negative */
+        c1 -= (int)(bn_sub_words(&(t[n2]), t, &(t[n2]), n2));
+    } else {
+        /* Might have a carry */
+        c1 += (int)(bn_add_words(&(t[n2]), &(t[n2]), t, n2));
+    }
+
+        /*-
+         * t[32] holds (a[0]-a[1])*(b[1]-b[0])+(a[0]*b[0])+(a[1]*b[1])
+         * r[10] holds (a[0]*b[0])
+         * r[32] holds (b[1]*b[1])
+         * c1 holds the carry bits
+         */
+    c1 += (int)(bn_add_words(&(r[n]), &(r[n]), &(t[n2]), n2));
+    if (c1) {
+        p = &(r[n + n2]);
+        lo = *p;
+        ln = (lo + c1) & BN_MASK2;
+        *p = ln;
+
+        /*
+         * The overflow will stop before we over write words we should not
+         * overwrite
+         */
+        if (ln < (BN_ULONG)c1) {
+            do {
+                p++;
+                lo = *p;
+                ln = (lo + 1) & BN_MASK2;
+                *p = ln;
+            } while (ln == 0);
+        }
+    }
+}
+
+/*
+ * n+tn is the word length t needs to be n*4 is size, as does r
+ */
 /* tnX may not be negative but less than n */
 void bn_mul_part_recursive(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n,
-	     int tna, int tnb, BN_ULONG *t)
-	{
-	int i,j,n2=n*2;
-	int c1,c2,neg;
-	BN_ULONG ln,lo,*p;
-
-	if (n < 8)
-		{
-		bn_mul_normal(r,a,n+tna,b,n+tnb);
-		return;
-		}
-
-	/* r=(a[0]-a[1])*(b[1]-b[0]) */
-	c1=bn_cmp_part_words(a,&(a[n]),tna,n-tna);
-	c2=bn_cmp_part_words(&(b[n]),b,tnb,tnb-n);
-	neg=0;
-	switch (c1*3+c2)
-		{
-	case -4:
-		bn_sub_part_words(t,      &(a[n]),a,      tna,tna-n); /* - */
-		bn_sub_part_words(&(t[n]),b,      &(b[n]),tnb,n-tnb); /* - */
-		break;
-	case -3:
-		/* break; */
-	case -2:
-		bn_sub_part_words(t,      &(a[n]),a,      tna,tna-n); /* - */
-		bn_sub_part_words(&(t[n]),&(b[n]),b,      tnb,tnb-n); /* + */
-		neg=1;
-		break;
-	case -1:
-	case 0:
-	case 1:
-		/* break; */
-	case 2:
-		bn_sub_part_words(t,      a,      &(a[n]),tna,n-tna); /* + */
-		bn_sub_part_words(&(t[n]),b,      &(b[n]),tnb,n-tnb); /* - */
-		neg=1;
-		break;
-	case 3:
-		/* break; */
-	case 4:
-		bn_sub_part_words(t,      a,      &(a[n]),tna,n-tna);
-		bn_sub_part_words(&(t[n]),&(b[n]),b,      tnb,tnb-n);
-		break;
-		}
-		/* The zero case isn't yet implemented here. The speedup
-		   would probably be negligible. */
+                           int tna, int tnb, BN_ULONG *t)
+{
+    int i, j, n2 = n * 2;
+    int c1, c2, neg;
+    BN_ULONG ln, lo, *p;
+
+    if (n < 8) {
+        bn_mul_normal(r, a, n + tna, b, n + tnb);
+        return;
+    }
+
+    /* r=(a[0]-a[1])*(b[1]-b[0]) */
+    c1 = bn_cmp_part_words(a, &(a[n]), tna, n - tna);
+    c2 = bn_cmp_part_words(&(b[n]), b, tnb, tnb - n);
+    neg = 0;
+    switch (c1 * 3 + c2) {
+    case -4:
+        bn_sub_part_words(t, &(a[n]), a, tna, tna - n); /* - */
+        bn_sub_part_words(&(t[n]), b, &(b[n]), tnb, n - tnb); /* - */
+        break;
+    case -3:
+        /* break; */
+    case -2:
+        bn_sub_part_words(t, &(a[n]), a, tna, tna - n); /* - */
+        bn_sub_part_words(&(t[n]), &(b[n]), b, tnb, tnb - n); /* + */
+        neg = 1;
+        break;
+    case -1:
+    case 0:
+    case 1:
+        /* break; */
+    case 2:
+        bn_sub_part_words(t, a, &(a[n]), tna, n - tna); /* + */
+        bn_sub_part_words(&(t[n]), b, &(b[n]), tnb, n - tnb); /* - */
+        neg = 1;
+        break;
+    case 3:
+        /* break; */
+    case 4:
+        bn_sub_part_words(t, a, &(a[n]), tna, n - tna);
+        bn_sub_part_words(&(t[n]), &(b[n]), b, tnb, tnb - n);
+        break;
+    }
+    /*
+     * The zero case isn't yet implemented here. The speedup would probably
+     * be negligible.
+     */
 # if 0
-	if (n == 4)
-		{
-		bn_mul_comba4(&(t[n2]),t,&(t[n]));
-		bn_mul_comba4(r,a,b);
-		bn_mul_normal(&(r[n2]),&(a[n]),tn,&(b[n]),tn);
-		memset(&(r[n2+tn*2]),0,sizeof(BN_ULONG)*(n2-tn*2));
-		}
-	else
+    if (n == 4) {
+        bn_mul_comba4(&(t[n2]), t, &(t[n]));
+        bn_mul_comba4(r, a, b);
+        bn_mul_normal(&(r[n2]), &(a[n]), tn, &(b[n]), tn);
+        memset(&(r[n2 + tn * 2]), 0, sizeof(BN_ULONG) * (n2 - tn * 2));
+    } else
 # endif
-	if (n == 8)
-		{
-		bn_mul_comba8(&(t[n2]),t,&(t[n]));
-		bn_mul_comba8(r,a,b);
-		bn_mul_normal(&(r[n2]),&(a[n]),tna,&(b[n]),tnb);
-		memset(&(r[n2+tna+tnb]),0,sizeof(BN_ULONG)*(n2-tna-tnb));
-		}
-	else
-		{
-		p= &(t[n2*2]);
-		bn_mul_recursive(&(t[n2]),t,&(t[n]),n,0,0,p);
-		bn_mul_recursive(r,a,b,n,0,0,p);
-		i=n/2;
-		/* If there is only a bottom half to the number,
-		 * just do it */
-		if (tna > tnb)
-			j = tna - i;
-		else
-			j = tnb - i;
-		if (j == 0)
-			{
-			bn_mul_recursive(&(r[n2]),&(a[n]),&(b[n]),
-				i,tna-i,tnb-i,p);
-			memset(&(r[n2+i*2]),0,sizeof(BN_ULONG)*(n2-i*2));
-			}
-		else if (j > 0) /* eg, n == 16, i == 8 and tn == 11 */
-				{
-				bn_mul_part_recursive(&(r[n2]),&(a[n]),&(b[n]),
-					i,tna-i,tnb-i,p);
-				memset(&(r[n2+tna+tnb]),0,
-					sizeof(BN_ULONG)*(n2-tna-tnb));
-				}
-		else /* (j < 0) eg, n == 16, i == 8 and tn == 5 */
-			{
-			memset(&(r[n2]),0,sizeof(BN_ULONG)*n2);
-			if (tna < BN_MUL_RECURSIVE_SIZE_NORMAL
-				&& tnb < BN_MUL_RECURSIVE_SIZE_NORMAL)
-				{
-				bn_mul_normal(&(r[n2]),&(a[n]),tna,&(b[n]),tnb);
-				}
-			else
-				{
-				for (;;)
-					{
-					i/=2;
-					/* these simplified conditions work
-					 * exclusively because difference
-					 * between tna and tnb is 1 or 0 */
-					if (i < tna || i < tnb)
-						{
-						bn_mul_part_recursive(&(r[n2]),
-							&(a[n]),&(b[n]),
-							i,tna-i,tnb-i,p);
-						break;
-						}
-					else if (i == tna || i == tnb)
-						{
-						bn_mul_recursive(&(r[n2]),
-							&(a[n]),&(b[n]),
-							i,tna-i,tnb-i,p);
-						break;
-						}
-					}
-				}
-			}
-		}
-
-	/*-
-	 * t[32] holds (a[0]-a[1])*(b[1]-b[0]), c1 is the sign
-	 * r[10] holds (a[0]*b[0])
-	 * r[32] holds (b[1]*b[1])
-	 */
-
-	c1=(int)(bn_add_words(t,r,&(r[n2]),n2));
-
-	if (neg) /* if t[32] is negative */
-		{
-		c1-=(int)(bn_sub_words(&(t[n2]),t,&(t[n2]),n2));
-		}
-	else
-		{
-		/* Might have a carry */
-		c1+=(int)(bn_add_words(&(t[n2]),&(t[n2]),t,n2));
-		}
-
-	/*-
-	 * t[32] holds (a[0]-a[1])*(b[1]-b[0])+(a[0]*b[0])+(a[1]*b[1])
-	 * r[10] holds (a[0]*b[0])
-	 * r[32] holds (b[1]*b[1])
-	 * c1 holds the carry bits
-	 */
-	c1+=(int)(bn_add_words(&(r[n]),&(r[n]),&(t[n2]),n2));
-	if (c1)
-		{
-		p= &(r[n+n2]);
-		lo= *p;
-		ln=(lo+c1)&BN_MASK2;
-		*p=ln;
-
-		/* The overflow will stop before we over write
-		 * words we should not overwrite */
-		if (ln < (BN_ULONG)c1)
-			{
-			do	{
-				p++;
-				lo= *p;
-				ln=(lo+1)&BN_MASK2;
-				*p=ln;
-				} while (ln == 0);
-			}
-		}
-	}
+    if (n == 8) {
+        bn_mul_comba8(&(t[n2]), t, &(t[n]));
+        bn_mul_comba8(r, a, b);
+        bn_mul_normal(&(r[n2]), &(a[n]), tna, &(b[n]), tnb);
+        memset(&(r[n2 + tna + tnb]), 0, sizeof(BN_ULONG) * (n2 - tna - tnb));
+    } else {
+        p = &(t[n2 * 2]);
+        bn_mul_recursive(&(t[n2]), t, &(t[n]), n, 0, 0, p);
+        bn_mul_recursive(r, a, b, n, 0, 0, p);
+        i = n / 2;
+        /*
+         * If there is only a bottom half to the number, just do it
+         */
+        if (tna > tnb)
+            j = tna - i;
+        else
+            j = tnb - i;
+        if (j == 0) {
+            bn_mul_recursive(&(r[n2]), &(a[n]), &(b[n]),
+                             i, tna - i, tnb - i, p);
+            memset(&(r[n2 + i * 2]), 0, sizeof(BN_ULONG) * (n2 - i * 2));
+        } else if (j > 0) {     /* eg, n == 16, i == 8 and tn == 11 */
+            bn_mul_part_recursive(&(r[n2]), &(a