Run util/openssl-format-source -v -c .
[openssl.git] / crypto / bn / bn_nist.c
index 2ca5b0139111f76352b3d2c08ba6232056efb942..66b2eb6f764a98de3bcaefa0678343aef2ad06ab 100644 (file)
@@ -10,7 +10,7 @@
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
+ *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
 #include "bn_lcl.h"
 #include "cryptlib.h"
 
-
-#define BN_NIST_192_TOP        (192+BN_BITS2-1)/BN_BITS2
-#define BN_NIST_224_TOP        (224+BN_BITS2-1)/BN_BITS2
-#define BN_NIST_256_TOP        (256+BN_BITS2-1)/BN_BITS2
-#define BN_NIST_384_TOP        (384+BN_BITS2-1)/BN_BITS2
-#define BN_NIST_521_TOP        (521+BN_BITS2-1)/BN_BITS2
+#define BN_NIST_192_TOP (192+BN_BITS2-1)/BN_BITS2
+#define BN_NIST_224_TOP (224+BN_BITS2-1)/BN_BITS2
+#define BN_NIST_256_TOP (256+BN_BITS2-1)/BN_BITS2
+#define BN_NIST_384_TOP (384+BN_BITS2-1)/BN_BITS2
+#define BN_NIST_521_TOP (521+BN_BITS2-1)/BN_BITS2
 
 /* pre-computed tables are "carry-less" values of modulus*(i+1) */
 #if BN_BITS2 == 64
 static const BN_ULONG _nist_p_192[][BN_NIST_192_TOP] = {
-       {0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFEULL,0xFFFFFFFFFFFFFFFFULL},
-       {0xFFFFFFFFFFFFFFFEULL,0xFFFFFFFFFFFFFFFDULL,0xFFFFFFFFFFFFFFFFULL},
-       {0xFFFFFFFFFFFFFFFDULL,0xFFFFFFFFFFFFFFFCULL,0xFFFFFFFFFFFFFFFFULL}
-       };
+    {0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFFULL},
+    {0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFFULL},
+    {0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFCULL, 0xFFFFFFFFFFFFFFFFULL}
+};
+
 static const BN_ULONG _nist_p_192_sqr[] = {
-       0x0000000000000001ULL,0x0000000000000002ULL,0x0000000000000001ULL,
-       0xFFFFFFFFFFFFFFFEULL,0xFFFFFFFFFFFFFFFDULL,0xFFFFFFFFFFFFFFFFULL
-       };
+    0x0000000000000001ULL, 0x0000000000000002ULL, 0x0000000000000001ULL,
+    0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFFULL
+};
+
 static const BN_ULONG _nist_p_224[][BN_NIST_224_TOP] = {
-       {0x0000000000000001ULL,0xFFFFFFFF00000000ULL,
-        0xFFFFFFFFFFFFFFFFULL,0x00000000FFFFFFFFULL},
-       {0x0000000000000002ULL,0xFFFFFFFE00000000ULL,
-        0xFFFFFFFFFFFFFFFFULL,0x00000001FFFFFFFFULL} /* this one is "carry-full" */
-       };
+    {0x0000000000000001ULL, 0xFFFFFFFF00000000ULL,
+     0xFFFFFFFFFFFFFFFFULL, 0x00000000FFFFFFFFULL},
+    {0x0000000000000002ULL, 0xFFFFFFFE00000000ULL,
+     0xFFFFFFFFFFFFFFFFULL, 0x00000001FFFFFFFFULL} /* this one is
+                                                    * "carry-full" */
+};
+
 static const BN_ULONG _nist_p_224_sqr[] = {
-       0x0000000000000001ULL,0xFFFFFFFE00000000ULL,
-       0xFFFFFFFFFFFFFFFFULL,0x0000000200000000ULL,
-       0x0000000000000000ULL,0xFFFFFFFFFFFFFFFEULL,
-       0xFFFFFFFFFFFFFFFFULL
-       };
+    0x0000000000000001ULL, 0xFFFFFFFE00000000ULL,
+    0xFFFFFFFFFFFFFFFFULL, 0x0000000200000000ULL,
+    0x0000000000000000ULL, 0xFFFFFFFFFFFFFFFEULL,
+    0xFFFFFFFFFFFFFFFFULL
+};
+
 static const BN_ULONG _nist_p_256[][BN_NIST_256_TOP] = {
-       {0xFFFFFFFFFFFFFFFFULL,0x00000000FFFFFFFFULL,
-        0x0000000000000000ULL,0xFFFFFFFF00000001ULL},
-       {0xFFFFFFFFFFFFFFFEULL,0x00000001FFFFFFFFULL,
-        0x0000000000000000ULL,0xFFFFFFFE00000002ULL},
-       {0xFFFFFFFFFFFFFFFDULL,0x00000002FFFFFFFFULL,
-        0x0000000000000000ULL,0xFFFFFFFD00000003ULL},
-       {0xFFFFFFFFFFFFFFFCULL,0x00000003FFFFFFFFULL,
-        0x0000000000000000ULL,0xFFFFFFFC00000004ULL},
-       {0xFFFFFFFFFFFFFFFBULL,0x00000004FFFFFFFFULL,
-        0x0000000000000000ULL,0xFFFFFFFB00000005ULL},
-       };
+    {0xFFFFFFFFFFFFFFFFULL, 0x00000000FFFFFFFFULL,
+     0x0000000000000000ULL, 0xFFFFFFFF00000001ULL},
+    {0xFFFFFFFFFFFFFFFEULL, 0x00000001FFFFFFFFULL,
+     0x0000000000000000ULL, 0xFFFFFFFE00000002ULL},
+    {0xFFFFFFFFFFFFFFFDULL, 0x00000002FFFFFFFFULL,
+     0x0000000000000000ULL, 0xFFFFFFFD00000003ULL},
+    {0xFFFFFFFFFFFFFFFCULL, 0x00000003FFFFFFFFULL,
+     0x0000000000000000ULL, 0xFFFFFFFC00000004ULL},
+    {0xFFFFFFFFFFFFFFFBULL, 0x00000004FFFFFFFFULL,
+     0x0000000000000000ULL, 0xFFFFFFFB00000005ULL},
+};
+
 static const BN_ULONG _nist_p_256_sqr[] = {
-       0x0000000000000001ULL,0xFFFFFFFE00000000ULL,
-       0xFFFFFFFFFFFFFFFFULL,0x00000001FFFFFFFEULL,
-       0x00000001FFFFFFFEULL,0x00000001FFFFFFFEULL,
-       0xFFFFFFFE00000001ULL,0xFFFFFFFE00000002ULL
-       };
+    0x0000000000000001ULL, 0xFFFFFFFE00000000ULL,
+    0xFFFFFFFFFFFFFFFFULL, 0x00000001FFFFFFFEULL,
+    0x00000001FFFFFFFEULL, 0x00000001FFFFFFFEULL,
+    0xFFFFFFFE00000001ULL, 0xFFFFFFFE00000002ULL
+};
+
 static const BN_ULONG _nist_p_384[][BN_NIST_384_TOP] = {
-       {0x00000000FFFFFFFFULL,0xFFFFFFFF00000000ULL,0xFFFFFFFFFFFFFFFEULL,
-        0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL},
-       {0x00000001FFFFFFFEULL,0xFFFFFFFE00000000ULL,0xFFFFFFFFFFFFFFFDULL,
-        0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL},
-       {0x00000002FFFFFFFDULL,0xFFFFFFFD00000000ULL,0xFFFFFFFFFFFFFFFCULL,
-        0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL},
-       {0x00000003FFFFFFFCULL,0xFFFFFFFC00000000ULL,0xFFFFFFFFFFFFFFFBULL,
-        0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL},
-       {0x00000004FFFFFFFBULL,0xFFFFFFFB00000000ULL,0xFFFFFFFFFFFFFFFAULL,
-        0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL},
-       };
+    {0x00000000FFFFFFFFULL, 0xFFFFFFFF00000000ULL, 0xFFFFFFFFFFFFFFFEULL,
+     0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL},
+    {0x00000001FFFFFFFEULL, 0xFFFFFFFE00000000ULL, 0xFFFFFFFFFFFFFFFDULL,
+     0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL},
+    {0x00000002FFFFFFFDULL, 0xFFFFFFFD00000000ULL, 0xFFFFFFFFFFFFFFFCULL,
+     0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL},
+    {0x00000003FFFFFFFCULL, 0xFFFFFFFC00000000ULL, 0xFFFFFFFFFFFFFFFBULL,
+     0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL},
+    {0x00000004FFFFFFFBULL, 0xFFFFFFFB00000000ULL, 0xFFFFFFFFFFFFFFFAULL,
+     0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL},
+};
+
 static const BN_ULONG _nist_p_384_sqr[] = {
-       0xFFFFFFFE00000001ULL,0x0000000200000000ULL,0xFFFFFFFE00000000ULL,
-       0x0000000200000000ULL,0x0000000000000001ULL,0x0000000000000000ULL,
-       0x00000001FFFFFFFEULL,0xFFFFFFFE00000000ULL,0xFFFFFFFFFFFFFFFDULL,
-       0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL
-       };
+    0xFFFFFFFE00000001ULL, 0x0000000200000000ULL, 0xFFFFFFFE00000000ULL,
+    0x0000000200000000ULL, 0x0000000000000001ULL, 0x0000000000000000ULL,
+    0x00000001FFFFFFFEULL, 0xFFFFFFFE00000000ULL, 0xFFFFFFFFFFFFFFFDULL,
+    0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL
+};
+
 static const BN_ULONG _nist_p_521[] =
-       {0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,
-       0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,
-       0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,
-       0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,
-       0x00000000000001FFULL};
+    { 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL,
+    0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL,
+    0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL,
+    0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL,
+    0x00000000000001FFULL
+};
+
 static const BN_ULONG _nist_p_521_sqr[] = {
-       0x0000000000000001ULL,0x0000000000000000ULL,0x0000000000000000ULL,
-       0x0000000000000000ULL,0x0000000000000000ULL,0x0000000000000000ULL,
-       0x0000000000000000ULL,0x0000000000000000ULL,0xFFFFFFFFFFFFFC00ULL,
-       0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,
-       0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,0xFFFFFFFFFFFFFFFFULL,
-       0xFFFFFFFFFFFFFFFFULL,0x000000000003FFFFULL
-       };
+    0x0000000000000001ULL, 0x0000000000000000ULL, 0x0000000000000000ULL,
+    0x0000000000000000ULL, 0x0000000000000000ULL, 0x0000000000000000ULL,
+    0x0000000000000000ULL, 0x0000000000000000ULL, 0xFFFFFFFFFFFFFC00ULL,
+    0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL,
+    0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL,
+    0xFFFFFFFFFFFFFFFFULL, 0x000000000003FFFFULL
+};
 #elif BN_BITS2 == 32
 static const BN_ULONG _nist_p_192[][BN_NIST_192_TOP] = {
-       {0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFE,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF},
-       {0xFFFFFFFE,0xFFFFFFFF,0xFFFFFFFD,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF},
-       {0xFFFFFFFD,0xFFFFFFFF,0xFFFFFFFC,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF}
-       };
+    {0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
+    {0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
+    {0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFC, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}
+};
+
 static const BN_ULONG _nist_p_192_sqr[] = {
-       0x00000001,0x00000000,0x00000002,0x00000000,0x00000001,0x00000000,
-       0xFFFFFFFE,0xFFFFFFFF,0xFFFFFFFD,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF
-       };
+    0x00000001, 0x00000000, 0x00000002, 0x00000000, 0x00000001, 0x00000000,
+    0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
+};
+
 static const BN_ULONG _nist_p_224[][BN_NIST_224_TOP] = {
-       {0x00000001,0x00000000,0x00000000,0xFFFFFFFF,
-        0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF},
-       {0x00000002,0x00000000,0x00000000,0xFFFFFFFE,
-        0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF}
-       };
+    {0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFF,
+     0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
+    {0x00000002, 0x00000000, 0x00000000, 0xFFFFFFFE,
+     0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}
+};
+
 static const BN_ULONG _nist_p_224_sqr[] = {
-       0x00000001,0x00000000,0x00000000,0xFFFFFFFE,
-       0xFFFFFFFF,0xFFFFFFFF,0x00000000,0x00000002,
-       0x00000000,0x00000000,0xFFFFFFFE,0xFFFFFFFF,
-       0xFFFFFFFF,0xFFFFFFFF
-       };
+    0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFE,
+    0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000002,
+    0x00000000, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFF,
+    0xFFFFFFFF, 0xFFFFFFFF
+};
+
 static const BN_ULONG _nist_p_256[][BN_NIST_256_TOP] = {
-       {0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0x00000000,
-        0x00000000,0x00000000,0x00000001,0xFFFFFFFF},
-       {0xFFFFFFFE,0xFFFFFFFF,0xFFFFFFFF,0x00000001,
-        0x00000000,0x00000000,0x00000002,0xFFFFFFFE},
-       {0xFFFFFFFD,0xFFFFFFFF,0xFFFFFFFF,0x00000002,
-        0x00000000,0x00000000,0x00000003,0xFFFFFFFD},
-       {0xFFFFFFFC,0xFFFFFFFF,0xFFFFFFFF,0x00000003,
-        0x00000000,0x00000000,0x00000004,0xFFFFFFFC},
-       {0xFFFFFFFB,0xFFFFFFFF,0xFFFFFFFF,0x00000004,
-        0x00000000,0x00000000,0x00000005,0xFFFFFFFB},
-       };
+    {0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000,
+     0x00000000, 0x00000000, 0x00000001, 0xFFFFFFFF},
+    {0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000001,
+     0x00000000, 0x00000000, 0x00000002, 0xFFFFFFFE},
+    {0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000002,
+     0x00000000, 0x00000000, 0x00000003, 0xFFFFFFFD},
+    {0xFFFFFFFC, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000003,
+     0x00000000, 0x00000000, 0x00000004, 0xFFFFFFFC},
+    {0xFFFFFFFB, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000004,
+     0x00000000, 0x00000000, 0x00000005, 0xFFFFFFFB},
+};
+
 static const BN_ULONG _nist_p_256_sqr[] = {
-       0x00000001,0x00000000,0x00000000,0xFFFFFFFE,
-       0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFE,0x00000001,
-       0xFFFFFFFE,0x00000001,0xFFFFFFFE,0x00000001,
-       0x00000001,0xFFFFFFFE,0x00000002,0xFFFFFFFE
-       };
+    0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFE,
+    0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0x00000001,
+    0xFFFFFFFE, 0x00000001, 0xFFFFFFFE, 0x00000001,
+    0x00000001, 0xFFFFFFFE, 0x00000002, 0xFFFFFFFE
+};
+
 static const BN_ULONG _nist_p_384[][BN_NIST_384_TOP] = {
-       {0xFFFFFFFF,0x00000000,0x00000000,0xFFFFFFFF,0xFFFFFFFE,0xFFFFFFFF,
-        0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF},
-       {0xFFFFFFFE,0x00000001,0x00000000,0xFFFFFFFE,0xFFFFFFFD,0xFFFFFFFF,
-        0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF},
-       {0xFFFFFFFD,0x00000002,0x00000000,0xFFFFFFFD,0xFFFFFFFC,0xFFFFFFFF,
-        0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF},
-       {0xFFFFFFFC,0x00000003,0x00000000,0xFFFFFFFC,0xFFFFFFFB,0xFFFFFFFF,
-        0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF},
-       {0xFFFFFFFB,0x00000004,0x00000000,0xFFFFFFFB,0xFFFFFFFA,0xFFFFFFFF,
-        0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF},
-       };
+    {0xFFFFFFFF, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFF,
+     0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
+    {0xFFFFFFFE, 0x00000001, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFD, 0xFFFFFFFF,
+     0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
+    {0xFFFFFFFD, 0x00000002, 0x00000000, 0xFFFFFFFD, 0xFFFFFFFC, 0xFFFFFFFF,
+     0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
+    {0xFFFFFFFC, 0x00000003, 0x00000000, 0xFFFFFFFC, 0xFFFFFFFB, 0xFFFFFFFF,
+     0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
+    {0xFFFFFFFB, 0x00000004, 0x00000000, 0xFFFFFFFB, 0xFFFFFFFA, 0xFFFFFFFF,
+     0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
+};
+
 static const BN_ULONG _nist_p_384_sqr[] = {
-       0x00000001,0xFFFFFFFE,0x00000000,0x00000002,0x00000000,0xFFFFFFFE,
-       0x00000000,0x00000002,0x00000001,0x00000000,0x00000000,0x00000000,
-       0xFFFFFFFE,0x00000001,0x00000000,0xFFFFFFFE,0xFFFFFFFD,0xFFFFFFFF,
-       0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF
-       };
-static const BN_ULONG _nist_p_521[] = {0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
-       0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
-       0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
-       0xFFFFFFFF,0x000001FF};
+    0x00000001, 0xFFFFFFFE, 0x00000000, 0x00000002, 0x00000000, 0xFFFFFFFE,
+    0x00000000, 0x00000002, 0x00000001, 0x00000000, 0x00000000, 0x00000000,
+    0xFFFFFFFE, 0x00000001, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFD, 0xFFFFFFFF,
+    0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
+};
+
+static const BN_ULONG _nist_p_521[] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+    0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+    0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+    0xFFFFFFFF, 0x000001FF
+};
+
 static const BN_ULONG _nist_p_521_sqr[] = {
-       0x00000001,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,
-       0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,0x00000000,
-       0x00000000,0x00000000,0x00000000,0x00000000,0xFFFFFC00,0xFFFFFFFF,
-       0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
-       0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
-       0xFFFFFFFF,0xFFFFFFFF,0x0003FFFF
-       };
+    0x00000001, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+    0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+    0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xFFFFFC00, 0xFFFFFFFF,
+    0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+    0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+    0xFFFFFFFF, 0xFFFFFFFF, 0x0003FFFF
+};
 #else
-#error "unsupported BN_BITS2"
+# error "unsupported BN_BITS2"
 #endif
 
-
-static const BIGNUM _bignum_nist_p_192 =
-       {
-       (BN_ULONG *)_nist_p_192[0],
-       BN_NIST_192_TOP,
-       BN_NIST_192_TOP,
-       0,
-       BN_FLG_STATIC_DATA
-       };
-
-static const BIGNUM _bignum_nist_p_224 =
-       {
-       (BN_ULONG *)_nist_p_224[0],
-       BN_NIST_224_TOP,
-       BN_NIST_224_TOP,
-       0,
-       BN_FLG_STATIC_DATA
-       };
-
-static const BIGNUM _bignum_nist_p_256 =
-       {
-       (BN_ULONG *)_nist_p_256[0],
-       BN_NIST_256_TOP,
-       BN_NIST_256_TOP,
-       0,
-       BN_FLG_STATIC_DATA
-       };
-
-static const BIGNUM _bignum_nist_p_384 =
-       {
-       (BN_ULONG *)_nist_p_384[0],
-       BN_NIST_384_TOP,
-       BN_NIST_384_TOP,
-       0,
-       BN_FLG_STATIC_DATA
-       };
-
-static const BIGNUM _bignum_nist_p_521 =
-       {
-       (BN_ULONG *)_nist_p_521,
-       BN_NIST_521_TOP,
-       BN_NIST_521_TOP,
-       0,
-       BN_FLG_STATIC_DATA
-       };
-
+static const BIGNUM _bignum_nist_p_192 = {
+    (BN_ULONG *)_nist_p_192[0],
+    BN_NIST_192_TOP,
+    BN_NIST_192_TOP,
+    0,
+    BN_FLG_STATIC_DATA
+};
+
+static const BIGNUM _bignum_nist_p_224 = {
+    (BN_ULONG *)_nist_p_224[0],
+    BN_NIST_224_TOP,
+    BN_NIST_224_TOP,
+    0,
+    BN_FLG_STATIC_DATA
+};
+
+static const BIGNUM _bignum_nist_p_256 = {
+    (BN_ULONG *)_nist_p_256[0],
+    BN_NIST_256_TOP,
+    BN_NIST_256_TOP,
+    0,
+    BN_FLG_STATIC_DATA
+};
+
+static const BIGNUM _bignum_nist_p_384 = {
+    (BN_ULONG *)_nist_p_384[0],
+    BN_NIST_384_TOP,
+    BN_NIST_384_TOP,
+    0,
+    BN_FLG_STATIC_DATA
+};
+
+static const BIGNUM _bignum_nist_p_521 = {
+    (BN_ULONG *)_nist_p_521,
+    BN_NIST_521_TOP,
+    BN_NIST_521_TOP,
+    0,
+    BN_FLG_STATIC_DATA
+};
 
 const BIGNUM *BN_get0_nist_prime_192(void)
-       {
-       return &_bignum_nist_p_192;
-       }
+{
+    return &_bignum_nist_p_192;
+}
 
 const BIGNUM *BN_get0_nist_prime_224(void)
-       {
-       return &_bignum_nist_p_224;
-       }
+{
+    return &_bignum_nist_p_224;
+}
 
 const BIGNUM *BN_get0_nist_prime_256(void)
-       {
-       return &_bignum_nist_p_256;
-       }
+{
+    return &_bignum_nist_p_256;
+}
 
 const BIGNUM *BN_get0_nist_prime_384(void)
-       {
-       return &_bignum_nist_p_384;
-       }
+{
+    return &_bignum_nist_p_384;
+}
 
 const BIGNUM *BN_get0_nist_prime_521(void)
-       {
-       return &_bignum_nist_p_521;
-       }
-
+{
+    return &_bignum_nist_p_521;
+}
 
 static void nist_cp_bn_0(BN_ULONG *buf, BN_ULONG *a, int top, int max)
-       {
-       int i;
-       BN_ULONG *_tmp1 = (buf), *_tmp2 = (a);
+{
+    int i;
+    BN_ULONG *_tmp1 = (buf), *_tmp2 = (a);
 
 #ifdef BN_DEBUG
-       OPENSSL_assert(top <= max);
+    OPENSSL_assert(top <= max);
 #endif
-       for (i = (top); i != 0; i--)
-               *_tmp1++ = *_tmp2++;
-       for (i = (max) - (top); i != 0; i--)
-               *_tmp1++ = (BN_ULONG) 0;
-       }
+    for (i = (top); i != 0; i--)
+        *_tmp1++ = *_tmp2++;
+    for (i = (max) - (top); i != 0; i--)
+        *_tmp1++ = (BN_ULONG)0;
+}
 
 static void nist_cp_bn(BN_ULONG *buf, BN_ULONG *a, int top)
-       { 
-       int i;
-       BN_ULONG *_tmp1 = (buf), *_tmp2 = (a);
-       for (i = (top); i != 0; i--)
-               *_tmp1++ = *_tmp2++;
-       }
+{
+    int i;
+    BN_ULONG *_tmp1 = (buf), *_tmp2 = (a);
+    for (i = (top); i != 0; i--)
+        *_tmp1++ = *_tmp2++;
+}
 
 #if BN_BITS2 == 64
-#define bn_cp_64(to, n, from, m)       (to)[n] = (m>=0)?((from)[m]):0;
-#define bn_64_set_0(to, n)             (to)[n] = (BN_ULONG)0;
+# define bn_cp_64(to, n, from, m)        (to)[n] = (m>=0)?((from)[m]):0;
+# define bn_64_set_0(to, n)              (to)[n] = (BN_ULONG)0;
 /*
  * two following macros are implemented under assumption that they
  * are called in a sequence with *ascending* n, i.e. as they are...
  */
-#define bn_cp_32_naked(to, n, from, m) (((n)&1)?(to[(n)/2]|=((m)&1)?(from[(m)/2]&BN_MASK2h):(from[(m)/2]<<32))\
-                                               :(to[(n)/2] =((m)&1)?(from[(m)/2]>>32):(from[(m)/2]&BN_MASK2l)))
-#define bn_32_set_0(to, n)             (((n)&1)?(to[(n)/2]&=BN_MASK2l):(to[(n)/2]=0));
-#define bn_cp_32(to,n,from,m)          ((m)>=0)?bn_cp_32_naked(to,n,from,m):bn_32_set_0(to,n)
+# define bn_cp_32_naked(to, n, from, m)  (((n)&1)?(to[(n)/2]|=((m)&1)?(from[(m)/2]&BN_MASK2h):(from[(m)/2]<<32))\
+                                                :(to[(n)/2] =((m)&1)?(from[(m)/2]>>32):(from[(m)/2]&BN_MASK2l)))
+# define bn_32_set_0(to, n)              (((n)&1)?(to[(n)/2]&=BN_MASK2l):(to[(n)/2]=0));
+# define bn_cp_32(to,n,from,m)           ((m)>=0)?bn_cp_32_naked(to,n,from,m):bn_32_set_0(to,n)
 #else
-#define bn_cp_64(to, n, from, m) \
-       { \
-       bn_cp_32(to, (n)*2, from, (m)*2); \
-       bn_cp_32(to, (n)*2+1, from, (m)*2+1); \
-       }
-#define bn_64_set_0(to, n) \
-       { \
-       bn_32_set_0(to, (n)*2); \
-       bn_32_set_0(to, (n)*2+1); \
-       }
-#if BN_BITS2 == 32
-#define bn_cp_32(to, n, from, m)       (to)[n] = (m>=0)?((from)[m]):0;
-#define bn_32_set_0(to, n)             (to)[n] = (BN_ULONG)0;
-#endif
-#endif /* BN_BITS2 != 64 */
-
+# define bn_cp_64(to, n, from, m) \
+        { \
+        bn_cp_32(to, (n)*2, from, (m)*2); \
+        bn_cp_32(to, (n)*2+1, from, (m)*2+1); \
+        }
+# define bn_64_set_0(to, n) \
+        { \
+        bn_32_set_0(to, (n)*2); \
+        bn_32_set_0(to, (n)*2+1); \
+        }
+# if BN_BITS2 == 32
+#  define bn_cp_32(to, n, from, m)        (to)[n] = (m>=0)?((from)[m]):0;
+#  define bn_32_set_0(to, n)              (to)[n] = (BN_ULONG)0;
+# endif
+#endif                          /* BN_BITS2 != 64 */
 
 #define nist_set_192(to, from, a1, a2, a3) \
-       { \
-       bn_cp_64(to, 0, from, (a3) - 3) \
-       bn_cp_64(to, 1, from, (a2) - 3) \
-       bn_cp_64(to, 2, from, (a1) - 3) \
-       }
+        { \
+        bn_cp_64(to, 0, from, (a3) - 3) \
+        bn_cp_64(to, 1, from, (a2) - 3) \
+        bn_cp_64(to, 2, from, (a1) - 3) \
+        }
 
 int BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
-       BN_CTX *ctx)
-       {
-       int      top = a->top, i;
-       int      carry;
-       register BN_ULONG *r_d, *a_d = a->d;
-       BN_ULONG t_d[BN_NIST_192_TOP],
-                buf[BN_NIST_192_TOP],
-                c_d[BN_NIST_192_TOP],
-               *res;
-       size_t   mask;
-       static const BIGNUM _bignum_nist_p_192_sqr = {
-               (BN_ULONG *)_nist_p_192_sqr,
-               sizeof(_nist_p_192_sqr)/sizeof(_nist_p_192_sqr[0]),
-               sizeof(_nist_p_192_sqr)/sizeof(_nist_p_192_sqr[0]),
-               0,BN_FLG_STATIC_DATA };
-
-       field = &_bignum_nist_p_192; /* just to make sure */
-
-       if (BN_is_negative(a) || BN_ucmp(a,&_bignum_nist_p_192_sqr)>=0)
-               return BN_nnmod(r, a, field, ctx);
-
-       i = BN_ucmp(field, a);
-       if (i == 0)
-               {
-               BN_zero(r);
-               return 1;
-               }
-       else if (i > 0)
-               return (r == a) ? 1 : (BN_copy(r ,a) != NULL);
-
-       if (r != a)
-               {
-               if (!bn_wexpand(r, BN_NIST_192_TOP))
-                       return 0;
-               r_d = r->d;
-               nist_cp_bn(r_d, a_d, BN_NIST_192_TOP);
-               }
-       else
-               r_d = a_d;
-
-       nist_cp_bn_0(buf, a_d + BN_NIST_192_TOP, top - BN_NIST_192_TOP, BN_NIST_192_TOP);
-
-       nist_set_192(t_d, buf, 0, 3, 3);
-       carry = (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP);
-       nist_set_192(t_d, buf, 4, 4, 0);
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP);
-       nist_set_192(t_d, buf, 5, 5, 5)
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP);
-
-       if (carry > 0)
-               carry = (int)bn_sub_words(r_d,r_d,_nist_p_192[carry-1],BN_NIST_192_TOP);
-       else
-               carry = 1;
-
-       /*
-        * we need 'if (carry==0 || result>=modulus) result-=modulus;'
-        * as comparison implies subtraction, we can write
-        * 'tmp=result-modulus; if (!carry || !borrow) result=tmp;'
-        * this is what happens below, but without explicit if:-) a.
-        */
-       mask  = 0-(size_t)bn_sub_words(c_d,r_d,_nist_p_192[0],BN_NIST_192_TOP);
-       mask &= 0-(size_t)carry;
-       res   = (BN_ULONG *)(((size_t)c_d&~mask) | ((size_t)r_d&mask));
-       nist_cp_bn(r_d, res, BN_NIST_192_TOP);
-       r->top = BN_NIST_192_TOP;
-       bn_correct_top(r);
-
-       return 1;
-       }
-
-typedef BN_ULONG (*bn_addsub_f)(BN_ULONG *,const BN_ULONG *,const BN_ULONG *,int);
+                    BN_CTX *ctx)
+{
+    int top = a->top, i;
+    int carry;
+    register BN_ULONG *r_d, *a_d = a->d;
+    BN_ULONG t_d[BN_NIST_192_TOP],
+        buf[BN_NIST_192_TOP], c_d[BN_NIST_192_TOP], *res;
+    size_t mask;
+    static const BIGNUM _bignum_nist_p_192_sqr = {
+        (BN_ULONG *)_nist_p_192_sqr,
+        sizeof(_nist_p_192_sqr) / sizeof(_nist_p_192_sqr[0]),
+        sizeof(_nist_p_192_sqr) / sizeof(_nist_p_192_sqr[0]),
+        0, BN_FLG_STATIC_DATA
+    };
+
+    field = &_bignum_nist_p_192; /* just to make sure */
+
+    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_192_sqr) >= 0)
+        return BN_nnmod(r, a, field, ctx);
+
+    i = BN_ucmp(field, a);
+    if (i == 0) {
+        BN_zero(r);
+        return 1;
+    } else if (i > 0)
+        return (r == a) ? 1 : (BN_copy(r, a) != NULL);
+
+    if (r != a) {
+        if (!bn_wexpand(r, BN_NIST_192_TOP))
+            return 0;
+        r_d = r->d;
+        nist_cp_bn(r_d, a_d, BN_NIST_192_TOP);
+    } else
+        r_d = a_d;
+
+    nist_cp_bn_0(buf, a_d + BN_NIST_192_TOP, top - BN_NIST_192_TOP,
+                 BN_NIST_192_TOP);
+
+    nist_set_192(t_d, buf, 0, 3, 3);
+    carry = (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP);
+    nist_set_192(t_d, buf, 4, 4, 0);
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP);
+    nist_set_192(t_d, buf, 5, 5, 5)
+        carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP);
+
+    if (carry > 0)
+        carry =
+            (int)bn_sub_words(r_d, r_d, _nist_p_192[carry - 1],
+                              BN_NIST_192_TOP);
+    else
+        carry = 1;
+
+    /*
+     * we need 'if (carry==0 || result>=modulus) result-=modulus;'
+     * as comparison implies subtraction, we can write
+     * 'tmp=result-modulus; if (!carry || !borrow) result=tmp;'
+     * this is what happens below, but without explicit if:-) a.
+     */
+    mask =
+        0 - (size_t)bn_sub_words(c_d, r_d, _nist_p_192[0], BN_NIST_192_TOP);
+    mask &= 0 - (size_t)carry;
+    res = (BN_ULONG *)(((size_t)c_d & ~mask) | ((size_t)r_d & mask));
+    nist_cp_bn(r_d, res, BN_NIST_192_TOP);
+    r->top = BN_NIST_192_TOP;
+    bn_correct_top(r);
+
+    return 1;
+}
+
+typedef BN_ULONG (*bn_addsub_f) (BN_ULONG *, const BN_ULONG *,
+                                 const BN_ULONG *, int);
 
 #define nist_set_224(to, from, a1, a2, a3, a4, a5, a6, a7) \
-       { \
-       bn_cp_32(to, 0, from, (a7) - 7) \
-       bn_cp_32(to, 1, from, (a6) - 7) \
-       bn_cp_32(to, 2, from, (a5) - 7) \
-       bn_cp_32(to, 3, from, (a4) - 7) \
-       bn_cp_32(to, 4, from, (a3) - 7) \
-       bn_cp_32(to, 5, from, (a2) - 7) \
-       bn_cp_32(to, 6, from, (a1) - 7) \
-       }
+        { \
+        bn_cp_32(to, 0, from, (a7) - 7) \
+        bn_cp_32(to, 1, from, (a6) - 7) \
+        bn_cp_32(to, 2, from, (a5) - 7) \
+        bn_cp_32(to, 3, from, (a4) - 7) \
+        bn_cp_32(to, 4, from, (a3) - 7) \
+        bn_cp_32(to, 5, from, (a2) - 7) \
+        bn_cp_32(to, 6, from, (a1) - 7) \
+        }
 
 int BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
-       BN_CTX *ctx)
-       {
-       int     top = a->top, i;
-       int     carry;
-       BN_ULONG *r_d, *a_d = a->d;
-       BN_ULONG t_d[BN_NIST_224_TOP],
-                buf[BN_NIST_224_TOP],
-                c_d[BN_NIST_224_TOP],
-               *res;
-       size_t   mask;
-       union { bn_addsub_f f; size_t p; } u;
-       static const BIGNUM _bignum_nist_p_224_sqr = {
-               (BN_ULONG *)_nist_p_224_sqr,
-               sizeof(_nist_p_224_sqr)/sizeof(_nist_p_224_sqr[0]),
-               sizeof(_nist_p_224_sqr)/sizeof(_nist_p_224_sqr[0]),
-               0,BN_FLG_STATIC_DATA };
-
-
-       field = &_bignum_nist_p_224; /* just to make sure */
-
-       if (BN_is_negative(a) || BN_ucmp(a,&_bignum_nist_p_224_sqr)>=0)
-               return BN_nnmod(r, a, field, ctx);
-
-       i = BN_ucmp(field, a);
-       if (i == 0)
-               {
-               BN_zero(r);
-               return 1;
-               }
-       else if (i > 0)
-               return (r == a)? 1 : (BN_copy(r ,a) != NULL);
-
-       if (r != a)
-               {
-               if (!bn_wexpand(r, BN_NIST_224_TOP))
-                       return 0;
-               r_d = r->d;
-               nist_cp_bn(r_d, a_d, BN_NIST_224_TOP);
-               }
-       else
-               r_d = a_d;
+                    BN_CTX *ctx)
+{
+    int top = a->top, i;
+    int carry;
+    BN_ULONG *r_d, *a_d = a->d;
+    BN_ULONG t_d[BN_NIST_224_TOP],
+        buf[BN_NIST_224_TOP], c_d[BN_NIST_224_TOP], *res;
+    size_t mask;
+    union {
+        bn_addsub_f f;
+        size_t p;
+    } u;
+    static const BIGNUM _bignum_nist_p_224_sqr = {
+        (BN_ULONG *)_nist_p_224_sqr,
+        sizeof(_nist_p_224_sqr) / sizeof(_nist_p_224_sqr[0]),
+        sizeof(_nist_p_224_sqr) / sizeof(_nist_p_224_sqr[0]),
+        0, BN_FLG_STATIC_DATA
+    };
+
+    field = &_bignum_nist_p_224; /* just to make sure */
+
+    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_224_sqr) >= 0)
+        return BN_nnmod(r, a, field, ctx);
+
+    i = BN_ucmp(field, a);
+    if (i == 0) {
+        BN_zero(r);
+        return 1;
+    } else if (i > 0)
+        return (r == a) ? 1 : (BN_copy(r, a) != NULL);
+
+    if (r != a) {
+        if (!bn_wexpand(r, BN_NIST_224_TOP))
+            return 0;
+        r_d = r->d;
+        nist_cp_bn(r_d, a_d, BN_NIST_224_TOP);
+    } else
+        r_d = a_d;
 
 #if BN_BITS2==64
-       /* copy upper 256 bits of 448 bit number ... */
-       nist_cp_bn_0(t_d, a_d + (BN_NIST_224_TOP-1), top - (BN_NIST_224_TOP-1), BN_NIST_224_TOP);
-       /* ... and right shift by 32 to obtain upper 224 bits */
-       nist_set_224(buf, t_d, 14, 13, 12, 11, 10, 9, 8);
-       /* truncate lower part to 224 bits too */
-       r_d[BN_NIST_224_TOP-1] &= BN_MASK2l;
+    /* copy upper 256 bits of 448 bit number ... */
+    nist_cp_bn_0(t_d, a_d + (BN_NIST_224_TOP - 1),
+                 top - (BN_NIST_224_TOP - 1), BN_NIST_224_TOP);
+    /* ... and right shift by 32 to obtain upper 224 bits */
+    nist_set_224(buf, t_d, 14, 13, 12, 11, 10, 9, 8);
+    /* truncate lower part to 224 bits too */
+    r_d[BN_NIST_224_TOP - 1] &= BN_MASK2l;
 #else
-       nist_cp_bn_0(buf, a_d + BN_NIST_224_TOP, top - BN_NIST_224_TOP, BN_NIST_224_TOP);
+    nist_cp_bn_0(buf, a_d + BN_NIST_224_TOP, top - BN_NIST_224_TOP,
+                 BN_NIST_224_TOP);
 #endif
-       nist_set_224(t_d, buf, 10, 9, 8, 7, 0, 0, 0);
-       carry = (int)bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP);
-       nist_set_224(t_d, buf, 0, 13, 12, 11, 0, 0, 0);
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP);
-       nist_set_224(t_d, buf, 13, 12, 11, 10, 9, 8, 7);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP);
-       nist_set_224(t_d, buf, 0, 0, 0, 0, 13, 12, 11);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP);
+    nist_set_224(t_d, buf, 10, 9, 8, 7, 0, 0, 0);
+    carry = (int)bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP);
+    nist_set_224(t_d, buf, 0, 13, 12, 11, 0, 0, 0);
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP);
+    nist_set_224(t_d, buf, 13, 12, 11, 10, 9, 8, 7);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP);
+    nist_set_224(t_d, buf, 0, 0, 0, 0, 13, 12, 11);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP);
 
 #if BN_BITS2==64
-       carry = (int)(r_d[BN_NIST_224_TOP-1]>>32);
+    carry = (int)(r_d[BN_NIST_224_TOP - 1] >> 32);
 #endif
-       u.f = bn_sub_words;
-       if (carry > 0)
-               {
-               carry = (int)bn_sub_words(r_d,r_d,_nist_p_224[carry-1],BN_NIST_224_TOP);
+    u.f = bn_sub_words;
+    if (carry > 0) {
+        carry =
+            (int)bn_sub_words(r_d, r_d, _nist_p_224[carry - 1],
+                              BN_NIST_224_TOP);
 #if BN_BITS2==64
-               carry=(int)(~(r_d[BN_NIST_224_TOP-1]>>32))&1;
+        carry = (int)(~(r_d[BN_NIST_224_TOP - 1] >> 32)) & 1;
 #endif
-               }
-       else if (carry < 0)
-               {
-               /* it's a bit more comlicated logic in this case.
-                * if bn_add_words yields no carry, then result
-                * has to be adjusted by unconditionally *adding*
-                * the modulus. but if it does, then result has
-                * to be compared to the modulus and conditionally
-                * adjusted by *subtracting* the latter. */
-               carry = (int)bn_add_words(r_d,r_d,_nist_p_224[-carry-1],BN_NIST_224_TOP);
-               mask = 0-(size_t)carry;
-               u.p = ((size_t)bn_sub_words&mask) | ((size_t)bn_add_words&~mask);
-               }
-       else
-               carry = 1;
-
-       /* otherwise it's effectively same as in BN_nist_mod_192... */
-       mask  = 0-(size_t)(*u.f)(c_d,r_d,_nist_p_224[0],BN_NIST_224_TOP);
-       mask &= 0-(size_t)carry;
-       res   = (BN_ULONG *)(((size_t)c_d&~mask) | ((size_t)r_d&mask));
-       nist_cp_bn(r_d, res, BN_NIST_224_TOP);
-       r->top = BN_NIST_224_TOP;
-       bn_correct_top(r);
-
-       return 1;
-       }
+    } else if (carry < 0) {
+        /*
+         * it's a bit more comlicated logic in this case. if bn_add_words
+         * yields no carry, then result has to be adjusted by unconditionally
+         * *adding* the modulus. but if it does, then result has to be
+         * compared to the modulus and conditionally adjusted by
+         * *subtracting* the latter.
+         */
+        carry =
+            (int)bn_add_words(r_d, r_d, _nist_p_224[-carry - 1],
+                              BN_NIST_224_TOP);
+        mask = 0 - (size_t)carry;
+        u.p = ((size_t)bn_sub_words & mask) | ((size_t)bn_add_words & ~mask);
+    } else
+        carry = 1;
+
+    /* otherwise it's effectively same as in BN_nist_mod_192... */
+    mask = 0 - (size_t)(*u.f) (c_d, r_d, _nist_p_224[0], BN_NIST_224_TOP);
+    mask &= 0 - (size_t)carry;
+    res = (BN_ULONG *)(((size_t)c_d & ~mask) | ((size_t)r_d & mask));
+    nist_cp_bn(r_d, res, BN_NIST_224_TOP);
+    r->top = BN_NIST_224_TOP;
+    bn_correct_top(r);
+
+    return 1;
+}
 
 #define nist_set_256(to, from, a1, a2, a3, a4, a5, a6, a7, a8) \
-       { \
-       bn_cp_32(to, 0, from, (a8) - 8) \
-       bn_cp_32(to, 1, from, (a7) - 8) \
-       bn_cp_32(to, 2, from, (a6) - 8) \
-       bn_cp_32(to, 3, from, (a5) - 8) \
-       bn_cp_32(to, 4, from, (a4) - 8) \
-       bn_cp_32(to, 5, from, (a3) - 8) \
-       bn_cp_32(to, 6, from, (a2) - 8) \
-       bn_cp_32(to, 7, from, (a1) - 8) \
-       }
+        { \
+        bn_cp_32(to, 0, from, (a8) - 8) \
+        bn_cp_32(to, 1, from, (a7) - 8) \
+        bn_cp_32(to, 2, from, (a6) - 8) \
+        bn_cp_32(to, 3, from, (a5) - 8) \
+        bn_cp_32(to, 4, from, (a4) - 8) \
+        bn_cp_32(to, 5, from, (a3) - 8) \
+        bn_cp_32(to, 6, from, (a2) - 8) \
+        bn_cp_32(to, 7, from, (a1) - 8) \
+        }
 
 int BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
-       BN_CTX *ctx)
-       {
-       int     i, top = a->top;
-       int     carry = 0;
-       register BN_ULONG *a_d = a->d, *r_d;
-       BN_ULONG t_d[BN_NIST_256_TOP],
-                buf[BN_NIST_256_TOP],
-                c_d[BN_NIST_256_TOP],
-               *res;
-       size_t   mask;
-       union { bn_addsub_f f; size_t p; } u;
-       static const BIGNUM _bignum_nist_p_256_sqr = {
-               (BN_ULONG *)_nist_p_256_sqr,
-               sizeof(_nist_p_256_sqr)/sizeof(_nist_p_256_sqr[0]),
-               sizeof(_nist_p_256_sqr)/sizeof(_nist_p_256_sqr[0]),
-               0,BN_FLG_STATIC_DATA };
-
-       field = &_bignum_nist_p_256; /* just to make sure */
-
-       if (BN_is_negative(a) || BN_ucmp(a,&_bignum_nist_p_256_sqr)>=0)
-               return BN_nnmod(r, a, field, ctx);
-
-       i = BN_ucmp(field, a);
-       if (i == 0)
-               {
-               BN_zero(r);
-               return 1;
-               }
-       else if (i > 0)
-               return (r == a)? 1 : (BN_copy(r ,a) != NULL);
-
-       if (r != a)
-               {
-               if (!bn_wexpand(r, BN_NIST_256_TOP))
-                       return 0;
-               r_d = r->d;
-               nist_cp_bn(r_d, a_d, BN_NIST_256_TOP);
-               }
-       else
-               r_d = a_d;
-
-       nist_cp_bn_0(buf, a_d + BN_NIST_256_TOP, top - BN_NIST_256_TOP, BN_NIST_256_TOP);
-
-       /*S1*/
-       nist_set_256(t_d, buf, 15, 14, 13, 12, 11, 0, 0, 0);
-       /*S2*/
-       nist_set_256(c_d, buf, 0, 15, 14, 13, 12, 0, 0, 0);
-       carry = (int)bn_add_words(t_d, t_d, c_d, BN_NIST_256_TOP);
-       /* left shift */
-               {
-               register BN_ULONG *ap,t,c;
-               ap = t_d;
-               c=0;
-               for (i = BN_NIST_256_TOP; i != 0; --i)
-                       {
-                       t= *ap;
-                       *(ap++)=((t<<1)|c)&BN_MASK2;
-                       c=(t & BN_TBIT)?1:0;
-                       }
-               carry <<= 1;
-               carry  |= c;
-               }
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
-       /*S3*/
-       nist_set_256(t_d, buf, 15, 14, 0, 0, 0, 10, 9, 8);
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
-       /*S4*/
-       nist_set_256(t_d, buf, 8, 13, 15, 14, 13, 11, 10, 9);
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
-       /*D1*/
-       nist_set_256(t_d, buf, 10, 8, 0, 0, 0, 13, 12, 11);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
-       /*D2*/
-       nist_set_256(t_d, buf, 11, 9, 0, 0, 15, 14, 13, 12);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
-       /*D3*/
-       nist_set_256(t_d, buf, 12, 0, 10, 9, 8, 15, 14, 13);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
-       /*D4*/
-       nist_set_256(t_d, buf, 13, 0, 11, 10, 9, 0, 15, 14);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
-
-       /* see BN_nist_mod_224 for explanation */
-       u.f = bn_sub_words;
-       if (carry > 0)
-               carry = (int)bn_sub_words(r_d,r_d,_nist_p_256[carry-1],BN_NIST_256_TOP);
-       else if (carry < 0)
-               {
-               carry = (int)bn_add_words(r_d,r_d,_nist_p_256[-carry-1],BN_NIST_256_TOP);
-               mask = 0-(size_t)carry;
-               u.p = ((size_t)bn_sub_words&mask) | ((size_t)bn_add_words&~mask);
-               }
-       else
-               carry = 1;
-
-       mask  = 0-(size_t)(*u.f)(c_d,r_d,_nist_p_256[0],BN_NIST_256_TOP);
-       mask &= 0-(size_t)carry;
-       res   = (BN_ULONG *)(((size_t)c_d&~mask) | ((size_t)r_d&mask));
-       nist_cp_bn(r_d, res, BN_NIST_256_TOP);
-       r->top = BN_NIST_256_TOP;
-       bn_correct_top(r);
-
-       return 1;
-       }
+                    BN_CTX *ctx)
+{
+    int i, top = a->top;
+    int carry = 0;
+    register BN_ULONG *a_d = a->d, *r_d;
+    BN_ULONG t_d[BN_NIST_256_TOP],
+        buf[BN_NIST_256_TOP], c_d[BN_NIST_256_TOP], *res;
+    size_t mask;
+    union {
+        bn_addsub_f f;
+        size_t p;
+    } u;
+    static const BIGNUM _bignum_nist_p_256_sqr = {
+        (BN_ULONG *)_nist_p_256_sqr,
+        sizeof(_nist_p_256_sqr) / sizeof(_nist_p_256_sqr[0]),
+        sizeof(_nist_p_256_sqr) / sizeof(_nist_p_256_sqr[0]),
+        0, BN_FLG_STATIC_DATA
+    };
+
+    field = &_bignum_nist_p_256; /* just to make sure */
+
+    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_256_sqr) >= 0)
+        return BN_nnmod(r, a, field, ctx);
+
+    i = BN_ucmp(field, a);
+    if (i == 0) {
+        BN_zero(r);
+        return 1;
+    } else if (i > 0)
+        return (r == a) ? 1 : (BN_copy(r, a) != NULL);
+
+    if (r != a) {
+        if (!bn_wexpand(r, BN_NIST_256_TOP))
+            return 0;
+        r_d = r->d;
+        nist_cp_bn(r_d, a_d, BN_NIST_256_TOP);
+    } else
+        r_d = a_d;
+
+    nist_cp_bn_0(buf, a_d + BN_NIST_256_TOP, top - BN_NIST_256_TOP,
+                 BN_NIST_256_TOP);
+
+    /*
+     * S1
+     */
+    nist_set_256(t_d, buf, 15, 14, 13, 12, 11, 0, 0, 0);
+    /*
+     * S2
+     */
+    nist_set_256(c_d, buf, 0, 15, 14, 13, 12, 0, 0, 0);
+    carry = (int)bn_add_words(t_d, t_d, c_d, BN_NIST_256_TOP);
+    /* left shift */
+    {
+        register BN_ULONG *ap, t, c;
+        ap = t_d;
+        c = 0;
+        for (i = BN_NIST_256_TOP; i != 0; --i) {
+            t = *ap;
+            *(ap++) = ((t << 1) | c) & BN_MASK2;
+            c = (t & BN_TBIT) ? 1 : 0;
+        }
+        carry <<= 1;
+        carry |= c;
+    }
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
+    /*
+     * S3
+     */
+    nist_set_256(t_d, buf, 15, 14, 0, 0, 0, 10, 9, 8);
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
+    /*
+     * S4
+     */
+    nist_set_256(t_d, buf, 8, 13, 15, 14, 13, 11, 10, 9);
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP);
+    /*
+     * D1
+     */
+    nist_set_256(t_d, buf, 10, 8, 0, 0, 0, 13, 12, 11);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
+    /*
+     * D2
+     */
+    nist_set_256(t_d, buf, 11, 9, 0, 0, 15, 14, 13, 12);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
+    /*
+     * D3
+     */
+    nist_set_256(t_d, buf, 12, 0, 10, 9, 8, 15, 14, 13);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
+    /*
+     * D4
+     */
+    nist_set_256(t_d, buf, 13, 0, 11, 10, 9, 0, 15, 14);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP);
+
+    /* see BN_nist_mod_224 for explanation */
+    u.f = bn_sub_words;
+    if (carry > 0)
+        carry =
+            (int)bn_sub_words(r_d, r_d, _nist_p_256[carry - 1],
+                              BN_NIST_256_TOP);
+    else if (carry < 0) {
+        carry =
+            (int)bn_add_words(r_d, r_d, _nist_p_256[-carry - 1],
+                              BN_NIST_256_TOP);
+        mask = 0 - (size_t)carry;
+        u.p = ((size_t)bn_sub_words & mask) | ((size_t)bn_add_words & ~mask);
+    } else
+        carry = 1;
+
+    mask = 0 - (size_t)(*u.f) (c_d, r_d, _nist_p_256[0], BN_NIST_256_TOP);
+    mask &= 0 - (size_t)carry;
+    res = (BN_ULONG *)(((size_t)c_d & ~mask) | ((size_t)r_d & mask));
+    nist_cp_bn(r_d, res, BN_NIST_256_TOP);
+    r->top = BN_NIST_256_TOP;
+    bn_correct_top(r);
+
+    return 1;
+}
 
 #define nist_set_384(to,from,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12) \
-       { \
-       bn_cp_32(to, 0, from,  (a12) - 12) \
-       bn_cp_32(to, 1, from,  (a11) - 12) \
-       bn_cp_32(to, 2, from,  (a10) - 12) \
-       bn_cp_32(to, 3, from,  (a9) - 12)  \
-       bn_cp_32(to, 4, from,  (a8) - 12)  \
-       bn_cp_32(to, 5, from,  (a7) - 12)  \
-       bn_cp_32(to, 6, from,  (a6) - 12)  \
-       bn_cp_32(to, 7, from,  (a5) - 12)  \
-       bn_cp_32(to, 8, from,  (a4) - 12)  \
-       bn_cp_32(to, 9, from,  (a3) - 12)  \
-       bn_cp_32(to, 10, from, (a2) - 12)  \
-       bn_cp_32(to, 11, from, (a1) - 12)  \
-       }
+        { \
+        bn_cp_32(to, 0, from,  (a12) - 12) \
+        bn_cp_32(to, 1, from,  (a11) - 12) \
+        bn_cp_32(to, 2, from,  (a10) - 12) \
+        bn_cp_32(to, 3, from,  (a9) - 12)  \
+        bn_cp_32(to, 4, from,  (a8) - 12)  \
+        bn_cp_32(to, 5, from,  (a7) - 12)  \
+        bn_cp_32(to, 6, from,  (a6) - 12)  \
+        bn_cp_32(to, 7, from,  (a5) - 12)  \
+        bn_cp_32(to, 8, from,  (a4) - 12)  \
+        bn_cp_32(to, 9, from,  (a3) - 12)  \
+        bn_cp_32(to, 10, from, (a2) - 12)  \
+        bn_cp_32(to, 11, from, (a1) - 12)  \
+        }
 
 int BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
-       BN_CTX *ctx)
-       {
-       int     i, top = a->top;
-       int     carry = 0;
-       register BN_ULONG *r_d, *a_d = a->d;
-       BN_ULONG t_d[BN_NIST_384_TOP],
-                buf[BN_NIST_384_TOP],
-                c_d[BN_NIST_384_TOP],
-               *res;
-       size_t   mask;
-       union { bn_addsub_f f; size_t p; } u;
-       static const BIGNUM _bignum_nist_p_384_sqr = {
-               (BN_ULONG *)_nist_p_384_sqr,
-               sizeof(_nist_p_384_sqr)/sizeof(_nist_p_384_sqr[0]),
-               sizeof(_nist_p_384_sqr)/sizeof(_nist_p_384_sqr[0]),
-               0,BN_FLG_STATIC_DATA };
-
-
-       field = &_bignum_nist_p_384; /* just to make sure */
-
-       if (BN_is_negative(a) || BN_ucmp(a,&_bignum_nist_p_384_sqr)>=0)
-               return BN_nnmod(r, a, field, ctx);
-
-       i = BN_ucmp(field, a);
-       if (i == 0)
-               {
-               BN_zero(r);
-               return 1;
-               }
-       else if (i > 0)
-               return (r == a)? 1 : (BN_copy(r ,a) != NULL);
-
-       if (r != a)
-               {
-               if (!bn_wexpand(r, BN_NIST_384_TOP))
-                       return 0;
-               r_d = r->d;
-               nist_cp_bn(r_d, a_d, BN_NIST_384_TOP);
-               }
-       else
-               r_d = a_d;
-
-       nist_cp_bn_0(buf, a_d + BN_NIST_384_TOP, top - BN_NIST_384_TOP, BN_NIST_384_TOP);
-
-       /*S1*/
-       nist_set_256(t_d, buf, 0, 0, 0, 0, 0, 23-4, 22-4, 21-4);
-               /* left shift */
-               {
-               register BN_ULONG *ap,t,c;
-               ap = t_d;
-               c=0;
-               for (i = 3; i != 0; --i)
-                       {
-                       t= *ap;
-                       *(ap++)=((t<<1)|c)&BN_MASK2;
-                       c=(t & BN_TBIT)?1:0;
-                       }
-               *ap=c;
-               }
-       carry = (int)bn_add_words(r_d+(128/BN_BITS2), r_d+(128/BN_BITS2), 
-               t_d, BN_NIST_256_TOP);
-       /*S2 */
-       carry += (int)bn_add_words(r_d, r_d, buf, BN_NIST_384_TOP);
-       /*S3*/
-       nist_set_384(t_d,buf,20,19,18,17,16,15,14,13,12,23,22,21);
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP);
-       /*S4*/
-       nist_set_384(t_d,buf,19,18,17,16,15,14,13,12,20,0,23,0);
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP);
-       /*S5*/
-       nist_set_384(t_d, buf,0,0,0,0,23,22,21,20,0,0,0,0);
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP);
-       /*S6*/
-       nist_set_384(t_d,buf,0,0,0,0,0,0,23,22,21,0,0,20);
-       carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP);
-       /*D1*/
-       nist_set_384(t_d,buf,22,21,20,19,18,17,16,15,14,13,12,23);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP);
-       /*D2*/
-       nist_set_384(t_d,buf,0,0,0,0,0,0,0,23,22,21,20,0);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP);
-       /*D3*/
-       nist_set_384(t_d,buf,0,0,0,0,0,0,0,23,23,0,0,0);
-       carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP);
-
-       /* see BN_nist_mod_224 for explanation */
-       u.f = bn_sub_words;
-       if (carry > 0)
-               carry = (int)bn_sub_words(r_d,r_d,_nist_p_384[carry-1],BN_NIST_384_TOP);
-       else if (carry < 0)
-               {
-               carry = (int)bn_add_words(r_d,r_d,_nist_p_384[-carry-1],BN_NIST_384_TOP);
-               mask = 0-(size_t)carry;
-               u.p = ((size_t)bn_sub_words&mask) | ((size_t)bn_add_words&~mask);
-               }
-       else
-               carry = 1;
-
-       mask  = 0-(size_t)(*u.f)(c_d,r_d,_nist_p_384[0],BN_NIST_384_TOP);
-       mask &= 0-(size_t)carry;
-       res   = (BN_ULONG *)(((size_t)c_d&~mask) | ((size_t)r_d&mask));
-       nist_cp_bn(r_d, res, BN_NIST_384_TOP);
-       r->top = BN_NIST_384_TOP;
-       bn_correct_top(r);
-
-       return 1;
-       }
-
-#define BN_NIST_521_RSHIFT     (521%BN_BITS2)
-#define BN_NIST_521_LSHIFT     (BN_BITS2-BN_NIST_521_RSHIFT)
-#define BN_NIST_521_TOP_MASK   ((BN_ULONG)BN_MASK2>>BN_NIST_521_LSHIFT)
+                    BN_CTX *ctx)
+{
+    int i, top = a->top;
+    int carry = 0;
+    register BN_ULONG *r_d, *a_d = a->d;
+    BN_ULONG t_d[BN_NIST_384_TOP],
+        buf[BN_NIST_384_TOP], c_d[BN_NIST_384_TOP], *res;
+    size_t mask;
+    union {
+        bn_addsub_f f;
+        size_t p;
+    } u;
+    static const BIGNUM _bignum_nist_p_384_sqr = {
+        (BN_ULONG *)_nist_p_384_sqr,
+        sizeof(_nist_p_384_sqr) / sizeof(_nist_p_384_sqr[0]),
+        sizeof(_nist_p_384_sqr) / sizeof(_nist_p_384_sqr[0]),
+        0, BN_FLG_STATIC_DATA
+    };
+
+    field = &_bignum_nist_p_384; /* just to make sure */
+
+    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_384_sqr) >= 0)
+        return BN_nnmod(r, a, field, ctx);
+
+    i = BN_ucmp(field, a);
+    if (i == 0) {
+        BN_zero(r);
+        return 1;
+    } else if (i > 0)
+        return (r == a) ? 1 : (BN_copy(r, a) != NULL);
+
+    if (r != a) {
+        if (!bn_wexpand(r, BN_NIST_384_TOP))
+            return 0;
+        r_d = r->d;
+        nist_cp_bn(r_d, a_d, BN_NIST_384_TOP);
+    } else
+        r_d = a_d;
+
+    nist_cp_bn_0(buf, a_d + BN_NIST_384_TOP, top - BN_NIST_384_TOP,
+                 BN_NIST_384_TOP);
+
+    /*
+     * S1
+     */
+    nist_set_256(t_d, buf, 0, 0, 0, 0, 0, 23 - 4, 22 - 4, 21 - 4);
+    /* left shift */
+    {
+        register BN_ULONG *ap, t, c;
+        ap = t_d;
+        c = 0;
+        for (i = 3; i != 0; --i) {
+            t = *ap;
+            *(ap++) = ((t << 1) | c) & BN_MASK2;
+            c = (t & BN_TBIT) ? 1 : 0;
+        }
+        *ap = c;
+    }
+    carry = (int)bn_add_words(r_d + (128 / BN_BITS2), r_d + (128 / BN_BITS2),
+                              t_d, BN_NIST_256_TOP);
+    /*
+     * S2
+     */
+    carry += (int)bn_add_words(r_d, r_d, buf, BN_NIST_384_TOP);
+    /*
+     * S3
+     */
+    nist_set_384(t_d, buf, 20, 19, 18, 17, 16, 15, 14, 13, 12, 23, 22, 21);
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP);
+    /*
+     * S4
+     */
+    nist_set_384(t_d, buf, 19, 18, 17, 16, 15, 14, 13, 12, 20, 0, 23, 0);
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP);
+    /*
+     * S5
+     */
+    nist_set_384(t_d, buf, 0, 0, 0, 0, 23, 22, 21, 20, 0, 0, 0, 0);
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP);
+    /*
+     * S6
+     */
+    nist_set_384(t_d, buf, 0, 0, 0, 0, 0, 0, 23, 22, 21, 0, 0, 20);
+    carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP);
+    /*
+     * D1
+     */
+    nist_set_384(t_d, buf, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 23);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP);
+    /*
+     * D2
+     */
+    nist_set_384(t_d, buf, 0, 0, 0, 0, 0, 0, 0, 23, 22, 21, 20, 0);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP);
+    /*
+     * D3
+     */
+    nist_set_384(t_d, buf, 0, 0, 0, 0, 0, 0, 0, 23, 23, 0, 0, 0);
+    carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP);
+
+    /* see BN_nist_mod_224 for explanation */
+    u.f = bn_sub_words;
+    if (carry > 0)
+        carry =
+            (int)bn_sub_words(r_d, r_d, _nist_p_384[carry - 1],
+                              BN_NIST_384_TOP);
+    else if (carry < 0) {
+        carry =
+            (int)bn_add_words(r_d, r_d, _nist_p_384[-carry - 1],
+                              BN_NIST_384_TOP);
+        mask = 0 - (size_t)carry;
+        u.p = ((size_t)bn_sub_words & mask) | ((size_t)bn_add_words & ~mask);
+    } else
+        carry = 1;
+
+    mask = 0 - (size_t)(*u.f) (c_d, r_d, _nist_p_384[0], BN_NIST_384_TOP);
+    mask &= 0 - (size_t)carry;
+    res = (BN_ULONG *)(((size_t)c_d & ~mask) | ((size_t)r_d & mask));
+    nist_cp_bn(r_d, res, BN_NIST_384_TOP);
+    r->top = BN_NIST_384_TOP;
+    bn_correct_top(r);
+
+    return 1;
+}
+
+#define BN_NIST_521_RSHIFT      (521%BN_BITS2)
+#define BN_NIST_521_LSHIFT      (BN_BITS2-BN_NIST_521_RSHIFT)
+#define BN_NIST_521_TOP_MASK    ((BN_ULONG)BN_MASK2>>BN_NIST_521_LSHIFT)
 
 int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
-       BN_CTX *ctx)
-       {
-       int     top = a->top, i;
-       BN_ULONG *r_d, *a_d = a->d,
-                t_d[BN_NIST_521_TOP],
-                val,tmp,*res;
-       size_t  mask;
-       static const BIGNUM _bignum_nist_p_521_sqr = {
-               (BN_ULONG *)_nist_p_521_sqr,
-               sizeof(_nist_p_521_sqr)/sizeof(_nist_p_521_sqr[0]),
-               sizeof(_nist_p_521_sqr)/sizeof(_nist_p_521_sqr[0]),
-               0,BN_FLG_STATIC_DATA };
-
-       field = &_bignum_nist_p_521; /* just to make sure */
-
-       if (BN_is_negative(a) || BN_ucmp(a,&_bignum_nist_p_521_sqr)>=0)
-               return BN_nnmod(r, a, field, ctx);
-
-       i = BN_ucmp(field, a);
-       if (i == 0)
-               {
-               BN_zero(r);
-               return 1;
-               }
-       else if (i > 0)
-               return (r == a)? 1 : (BN_copy(r ,a) != NULL);
-
-       if (r != a)
-               {
-               if (!bn_wexpand(r,BN_NIST_521_TOP))
-                       return 0;
-               r_d = r->d;
-               nist_cp_bn(r_d,a_d, BN_NIST_521_TOP);
-               }
-       else
-               r_d = a_d;
-
-       /* upper 521 bits, copy ... */
-       nist_cp_bn_0(t_d,a_d + (BN_NIST_521_TOP-1), top - (BN_NIST_521_TOP-1),BN_NIST_521_TOP);
-       /* ... and right shift */
-       for (val=t_d[0],i=0; i<BN_NIST_521_TOP-1; i++)
-               {
-               tmp = val>>BN_NIST_521_RSHIFT;
-               val = t_d[i+1];
-               t_d[i] = (tmp | val<<BN_NIST_521_LSHIFT) & BN_MASK2;
-               }
-       t_d[i] = val>>BN_NIST_521_RSHIFT;
-       /* lower 521 bits */
-       r_d[i] &= BN_NIST_521_TOP_MASK;
-
-       bn_add_words(r_d,r_d,t_d,BN_NIST_521_TOP);
-       mask = 0-(size_t)bn_sub_words(t_d,r_d,_nist_p_521,BN_NIST_521_TOP);
-       res  = (BN_ULONG *)(((size_t)t_d&~mask) | ((size_t)r_d&mask));
-       nist_cp_bn(r_d,res,BN_NIST_521_TOP);
-       r->top = BN_NIST_521_TOP;
-       bn_correct_top(r);
-
-       return 1;
-       }
+                    BN_CTX *ctx)
+{
+    int top = a->top, i;
+    BN_ULONG *r_d, *a_d = a->d, t_d[BN_NIST_521_TOP], val, tmp, *res;
+    size_t mask;
+    static const BIGNUM _bignum_nist_p_521_sqr = {
+        (BN_ULONG *)_nist_p_521_sqr,
+        sizeof(_nist_p_521_sqr) / sizeof(_nist_p_521_sqr[0]),
+        sizeof(_nist_p_521_sqr) / sizeof(_nist_p_521_sqr[0]),
+        0, BN_FLG_STATIC_DATA
+    };
+
+    field = &_bignum_nist_p_521; /* just to make sure */
+
+    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_521_sqr) >= 0)
+        return BN_nnmod(r, a, field, ctx);
+
+    i = BN_ucmp(field, a);
+    if (i == 0) {
+        BN_zero(r);
+        return 1;
+    } else if (i > 0)
+        return (r == a) ? 1 : (BN_copy(r, a) != NULL);
+
+    if (r != a) {
+        if (!bn_wexpand(r, BN_NIST_521_TOP))
+            return 0;
+        r_d = r->d;
+        nist_cp_bn(r_d, a_d, BN_NIST_521_TOP);
+    } else
+        r_d = a_d;
+
+    /* upper 521 bits, copy ... */
+    nist_cp_bn_0(t_d, a_d + (BN_NIST_521_TOP - 1),
+                 top - (BN_NIST_521_TOP - 1), BN_NIST_521_TOP);
+    /* ... and right shift */
+    for (val = t_d[0], i = 0; i < BN_NIST_521_TOP - 1; i++) {
+        tmp = val >> BN_NIST_521_RSHIFT;
+        val = t_d[i + 1];
+        t_d[i] = (tmp | val << BN_NIST_521_LSHIFT) & BN_MASK2;
+    }
+    t_d[i] = val >> BN_NIST_521_RSHIFT;
+    /* lower 521 bits */
+    r_d[i] &= BN_NIST_521_TOP_MASK;
+
+    bn_add_words(r_d, r_d, t_d, BN_NIST_521_TOP);
+    mask = 0 - (size_t)bn_sub_words(t_d, r_d, _nist_p_521, BN_NIST_521_TOP);
+    res = (BN_ULONG *)(((size_t)t_d & ~mask) | ((size_t)r_d & mask));
+    nist_cp_bn(r_d, res, BN_NIST_521_TOP);
+    r->top = BN_NIST_521_TOP;
+    bn_correct_top(r);
+
+    return 1;
+}