Compiles correctly: app/build-native + gradle.

1 files changed, 844 insertions, 0 deletions

diff --git a/app/openssl/crypto/bn/bn_nist.c b/app/openssl/crypto/bn/bn_nist.c
new file mode 100644
index 00000000..c6de0326
--- /dev/null
+++ b/app/openssl/crypto/bn/bn_nist.c
@@ -0,0 +1,844 @@
+/* crypto/bn/bn_nist.c */
+/*
+ * Written by Nils Larsch for the OpenSSL project
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    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
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#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
+
+/* 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}
+	};
+static const BN_ULONG _nist_p_192_sqr[] = {
+	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" */
+	};
+static const BN_ULONG _nist_p_224_sqr[] = {
+	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},
+	};
+static const BN_ULONG _nist_p_256_sqr[] = {
+	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},
+	};
+static const BN_ULONG _nist_p_384_sqr[] = {
+	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};
+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
+	};
+#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}
+	};
+static const BN_ULONG _nist_p_192_sqr[] = {
+	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}
+	};
+static const BN_ULONG _nist_p_224_sqr[] = {
+	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},
+	};
+static const BN_ULONG _nist_p_256_sqr[] = {
+	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},
+	};
+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};
+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
+	};
+#else
+#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
+	};
+
+
+const BIGNUM *BN_get0_nist_prime_192(void)
+	{
+	return &_bignum_nist_p_192;
+	}
+
+const BIGNUM *BN_get0_nist_prime_224(void)
+	{
+	return &_bignum_nist_p_224;
+	}
+
+const BIGNUM *BN_get0_nist_prime_256(void)
+	{
+	return &_bignum_nist_p_256;
+	}
+
+const BIGNUM *BN_get0_nist_prime_384(void)
+	{
+	return &_bignum_nist_p_384;
+	}
+
+const BIGNUM *BN_get0_nist_prime_521(void)
+	{
+	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);
+
+#ifdef BN_DEBUG
+	OPENSSL_assert(top <= max);
+#endif
+	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++;
+	}
+
+#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;
+/*
+ * 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)
+#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 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) \
+	}
+
+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;
+	PTR_SIZE_INT 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-(PTR_SIZE_INT)bn_sub_words(c_d,r_d,_nist_p_192[0],BN_NIST_192_TOP);
+	mask &= 0-(PTR_SIZE_INT)carry;
+	res   = (BN_ULONG *)
+	 (((PTR_SIZE_INT)c_d&~mask) | ((PTR_SIZE_INT)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) \
+	}
+
+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;
+	PTR_SIZE_INT mask;
+	union { bn_addsub_f f; PTR_SIZE_INT 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;
+#else
+	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);
+
+#if BN_BITS2==64
+	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);
+#if BN_BITS2==64
+		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-(PTR_SIZE_INT)carry;
+		u.p = ((PTR_SIZE_INT)bn_sub_words&mask) |
+		 ((PTR_SIZE_INT)bn_add_words&~mask);
+		}
+	else
+		carry = 1;
+
+	/* otherwise it's effectively same as in BN_nist_mod_192... */
+	mask  = 0-(PTR_SIZE_INT)(*u.f)(c_d,r_d,_nist_p_224[0],BN_NIST_224_TOP);
+	mask &= 0-(PTR_SIZE_INT)carry;
+	res   = (BN_ULONG *)(((PTR_SIZE_INT)c_d&~mask) |
+	 ((PTR_SIZE_INT)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) \
+	}
+
+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;
+	PTR_SIZE_INT mask;
+	union { bn_addsub_f f; PTR_SIZE_INT 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-(PTR_SIZE_INT)carry;
+		u.p = ((PTR_SIZE_INT)bn_sub_words&mask) |
+		 ((PTR_SIZE_INT)bn_add_words&~mask);
+		}
+	else
+		carry = 1;
+
+	mask  = 0-(PTR_SIZE_INT)(*u.f)(c_d,r_d,_nist_p_256[0],BN_NIST_256_TOP);
+	mask &= 0-(PTR_SIZE_INT)carry;
+	res   = (BN_ULONG *)(((PTR_SIZE_INT)c_d&~mask) |
+	 ((PTR_SIZE_INT)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)  \
+	}
+
+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;
+	PTR_SIZE_INT mask;
+	union { bn_addsub_f f; PTR_SIZE_INT 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-(PTR_SIZE_INT)carry;
+		u.p = ((PTR_SIZE_INT)bn_sub_words&mask) |
+		 ((PTR_SIZE_INT)bn_add_words&~mask);
+		}
+	else
+		carry = 1;
+
+	mask  = 0-(PTR_SIZE_INT)(*u.f)(c_d,r_d,_nist_p_384[0],BN_NIST_384_TOP);
+	mask &= 0-(PTR_SIZE_INT)carry;
+	res   = (BN_ULONG *)(((PTR_SIZE_INT)c_d&~mask) |
+	 ((PTR_SIZE_INT)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;
+	PTR_SIZE_INT 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-(PTR_SIZE_INT)bn_sub_words(t_d,r_d,_nist_p_521,BN_NIST_521_TOP);
+	res  = (BN_ULONG *)(((PTR_SIZE_INT)t_d&~mask) |
+	 ((PTR_SIZE_INT)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;
+	}