ics-openvpn as a submodule! beautiful

ics-openvpn is now officially on GitHub, and they track openssl and
openvpn as submodules, so it's easier to update everything. Just a git
submodule update --recursive.

I've also set up soft links to native modules from ics-openvpn in app,
so that we don't copy files in Gradle (which was causing problems with
the submodules .git* files, not being copied). That makes the repo
cleaner.

1 files changed, 0 insertions, 655 deletions

diff --git a/app/openssl/crypto/bn/bn_gcd.c b/app/openssl/crypto/bn/bn_gcd.c
deleted file mode 100644
index a808f531..00000000
--- a/app/openssl/crypto/bn/bn_gcd.c
+++ /dev/null
@@ -1,655 +0,0 @@
-/* crypto/bn/bn_gcd.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * 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:
- * 1. Redistributions of source code must retain the 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 acknowledgement:
- *    "This product includes cryptographic software written by
- *     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 
- *    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
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR 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.
- * 
- * 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
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2001 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 "cryptlib.h"
-#include "bn_lcl.h"
-
-static BIGNUM *euclid(BIGNUM *a, BIGNUM *b);
-
-int BN_gcd(BIGNUM *r, const BIGNUM *in_a, const BIGNUM *in_b, BN_CTX *ctx)
-	{
-	BIGNUM *a,*b,*t;
-	int ret=0;
-
-	bn_check_top(in_a);
-	bn_check_top(in_b);
-
-	BN_CTX_start(ctx);
-	a = BN_CTX_get(ctx);
-	b = BN_CTX_get(ctx);
-	if (a == NULL || b == NULL) goto err;
-
-	if (BN_copy(a,in_a) == NULL) goto err;
-	if (BN_copy(b,in_b) == NULL) goto err;
-	a->neg = 0;
-	b->neg = 0;
-
-	if (BN_cmp(a,b) < 0) { t=a; a=b; b=t; }
-	t=euclid(a,b);
-	if (t == NULL) goto err;
-
-	if (BN_copy(r,t) == NULL) goto err;
-	ret=1;
-err:
-	BN_CTX_end(ctx);
-	bn_check_top(r);
-	return(ret);
-	}
-
-static BIGNUM *euclid(BIGNUM *a, BIGNUM *b)
-	{
-	BIGNUM *t;
-	int shifts=0;
-
-	bn_check_top(a);
-	bn_check_top(b);
-
-	/* 0 <= b <= a */
-	while (!BN_is_zero(b))
-		{
-		/* 0 < b <= a */
-
-		if (BN_is_odd(a))
-			{
-			if (BN_is_odd(b))
-				{
-				if (!BN_sub(a,a,b)) goto err;
-				if (!BN_rshift1(a,a)) goto err;
-				if (BN_cmp(a,b) < 0)
-					{ t=a; a=b; b=t; }
-				}
-			else		/* a odd - b even */
-				{
-				if (!BN_rshift1(b,b)) goto err;
-				if (BN_cmp(a,b) < 0)
-					{ t=a; a=b; b=t; }
-				}
-			}
-		else			/* a is even */
-			{
-			if (BN_is_odd(b))
-				{
-				if (!BN_rshift1(a,a)) goto err;
-				if (BN_cmp(a,b) < 0)
-					{ t=a; a=b; b=t; }
-				}
-			else		/* a even - b even */
-				{
-				if (!BN_rshift1(a,a)) goto err;
-				if (!BN_rshift1(b,b)) goto err;
-				shifts++;
-				}
-			}
-		/* 0 <= b <= a */
-		}
-
-	if (shifts)
-		{
-		if (!BN_lshift(a,a,shifts)) goto err;
-		}
-	bn_check_top(a);
-	return(a);
-err:
-	return(NULL);
-	}
-
-
-/* solves ax == 1 (mod n) */
-static BIGNUM *BN_mod_inverse_no_branch(BIGNUM *in,
-        const BIGNUM *a, const BIGNUM *n, BN_CTX *ctx);
-
-BIGNUM *BN_mod_inverse(BIGNUM *in,
-	const BIGNUM *a, const BIGNUM *n, BN_CTX *ctx)
-	{
-	BIGNUM *A,*B,*X,*Y,*M,*D,*T,*R=NULL;
-	BIGNUM *ret=NULL;
-	int sign;
-
-	if ((BN_get_flags(a, BN_FLG_CONSTTIME) != 0) || (BN_get_flags(n, BN_FLG_CONSTTIME) != 0))
-		{
-		return BN_mod_inverse_no_branch(in, a, n, ctx);
-		}
-
-	bn_check_top(a);
-	bn_check_top(n);
-
-	BN_CTX_start(ctx);
-	A = BN_CTX_get(ctx);
-	B = BN_CTX_get(ctx);
-	X = BN_CTX_get(ctx);
-	D = BN_CTX_get(ctx);
-	M = BN_CTX_get(ctx);
-	Y = BN_CTX_get(ctx);
-	T = BN_CTX_get(ctx);
-	if (T == NULL) goto err;
-
-	if (in == NULL)
-		R=BN_new();
-	else
-		R=in;
-	if (R == NULL) goto err;
-
-	BN_one(X);
-	BN_zero(Y);
-	if (BN_copy(B,a) == NULL) goto err;
-	if (BN_copy(A,n) == NULL) goto err;
-	A->neg = 0;
-	if (B->neg || (BN_ucmp(B, A) >= 0))
-		{
-		if (!BN_nnmod(B, B, A, ctx)) goto err;
-		}
-	sign = -1;
-	/* From  B = a mod |n|,  A = |n|  it follows that
-	 *
-	 *      0 <= B < A,
-	 *     -sign*X*a  ==  B   (mod |n|),
-	 *      sign*Y*a  ==  A   (mod |n|).
-	 */
-
-	if (BN_is_odd(n) && (BN_num_bits(n) <= (BN_BITS <= 32 ? 450 : 2048)))
-		{
-		/* Binary inversion algorithm; requires odd modulus.
-		 * This is faster than the general algorithm if the modulus
-		 * is sufficiently small (about 400 .. 500 bits on 32-bit
-		 * sytems, but much more on 64-bit systems) */
-		int shift;
-		
-		while (!BN_is_zero(B))
-			{
-			/*
-			 *      0 < B < |n|,
-			 *      0 < A <= |n|,
-			 * (1) -sign*X*a  ==  B   (mod |n|),
-			 * (2)  sign*Y*a  ==  A   (mod |n|)
-			 */
-
-			/* Now divide  B  by the maximum possible power of two in the integers,
-			 * and divide  X  by the same value mod |n|.
-			 * When we're done, (1) still holds. */
-			shift = 0;
-			while (!BN_is_bit_set(B, shift)) /* note that 0 < B */
-				{
-				shift++;
-				
-				if (BN_is_odd(X))
-					{
-					if (!BN_uadd(X, X, n)) goto err;
-					}
-				/* now X is even, so we can easily divide it by two */
-				if (!BN_rshift1(X, X)) goto err;
-				}
-			if (shift > 0)
-				{
-				if (!BN_rshift(B, B, shift)) goto err;
-				}
-
-
-			/* Same for  A  and  Y.  Afterwards, (2) still holds. */
-			shift = 0;
-			while (!BN_is_bit_set(A, shift)) /* note that 0 < A */
-				{
-				shift++;
-				
-				if (BN_is_odd(Y))
-					{
-					if (!BN_uadd(Y, Y, n)) goto err;
-					}
-				/* now Y is even */
-				if (!BN_rshift1(Y, Y)) goto err;
-				}
-			if (shift > 0)
-				{
-				if (!BN_rshift(A, A, shift)) goto err;
-				}
-
-			
-			/* We still have (1) and (2).
-			 * Both  A  and  B  are odd.
-			 * The following computations ensure that
-			 *
-			 *     0 <= B < |n|,
-			 *      0 < A < |n|,
-			 * (1) -sign*X*a  ==  B   (mod |n|),
-			 * (2)  sign*Y*a  ==  A   (mod |n|),
-			 *
-			 * and that either  A  or  B  is even in the next iteration.
-			 */
-			if (BN_ucmp(B, A) >= 0)
-				{
-				/* -sign*(X + Y)*a == B - A  (mod |n|) */
-				if (!BN_uadd(X, X, Y)) goto err;
-				/* NB: we could use BN_mod_add_quick(X, X, Y, n), but that
-				 * actually makes the algorithm slower */
-				if (!BN_usub(B, B, A)) goto err;
-				}
-			else
-				{
-				/*  sign*(X + Y)*a == A - B  (mod |n|) */
-				if (!BN_uadd(Y, Y, X)) goto err;
-				/* as above, BN_mod_add_quick(Y, Y, X, n) would slow things down */
-				if (!BN_usub(A, A, B)) goto err;
-				}
-			}
-		}
-	else
-		{
-		/* general inversion algorithm */
-
-		while (!BN_is_zero(B))
-			{
-			BIGNUM *tmp;
-			
-			/*
-			 *      0 < B < A,
-			 * (*) -sign*X*a  ==  B   (mod |n|),
-			 *      sign*Y*a  ==  A   (mod |n|)
-			 */
-			
-			/* (D, M) := (A/B, A%B) ... */
-			if (BN_num_bits(A) == BN_num_bits(B))
-				{
-				if (!BN_one(D)) goto err;
-				if (!BN_sub(M,A,B)) goto err;
-				}
-			else if (BN_num_bits(A) == BN_num_bits(B) + 1)
-				{
-				/* A/B is 1, 2, or 3 */
-				if (!BN_lshift1(T,B)) goto err;
-				if (BN_ucmp(A,T) < 0)
-					{
-					/* A < 2*B, so D=1 */
-					if (!BN_one(D)) goto err;
-					if (!BN_sub(M,A,B)) goto err;
-					}
-				else
-					{
-					/* A >= 2*B, so D=2 or D=3 */
-					if (!BN_sub(M,A,T)) goto err;
-					if (!BN_add(D,T,B)) goto err; /* use D (:= 3*B) as temp */
-					if (BN_ucmp(A,D) < 0)
-						{
-						/* A < 3*B, so D=2 */
-						if (!BN_set_word(D,2)) goto err;
-						/* M (= A - 2*B) already has the correct value */
-						}
-					else
-						{
-						/* only D=3 remains */
-						if (!BN_set_word(D,3)) goto err;
-						/* currently  M = A - 2*B,  but we need  M = A - 3*B */
-						if (!BN_sub(M,M,B)) goto err;
-						}
-					}
-				}
-			else
-				{
-				if (!BN_div(D,M,A,B,ctx)) goto err;
-				}
-			
-			/* Now
-			 *      A = D*B + M;
-			 * thus we have
-			 * (**)  sign*Y*a  ==  D*B + M   (mod |n|).
-			 */
-			
-			tmp=A; /* keep the BIGNUM object, the value does not matter */
-			
-			/* (A, B) := (B, A mod B) ... */
-			A=B;
-			B=M;
-			/* ... so we have  0 <= B < A  again */
-			
-			/* Since the former  M  is now  B  and the former  B  is now  A,
-			 * (**) translates into
-			 *       sign*Y*a  ==  D*A + B    (mod |n|),
-			 * i.e.
-			 *       sign*Y*a - D*A  ==  B    (mod |n|).
-			 * Similarly, (*) translates into
-			 *      -sign*X*a  ==  A          (mod |n|).
-			 *
-			 * Thus,
-			 *   sign*Y*a + D*sign*X*a  ==  B  (mod |n|),
-			 * i.e.
-			 *        sign*(Y + D*X)*a  ==  B  (mod |n|).
-			 *
-			 * So if we set  (X, Y, sign) := (Y + D*X, X, -sign),  we arrive back at
-			 *      -sign*X*a  ==  B   (mod |n|),
-			 *       sign*Y*a  ==  A   (mod |n|).
-			 * Note that  X  and  Y  stay non-negative all the time.
-			 */
-			
-			/* most of the time D is very small, so we can optimize tmp := D*X+Y */
-			if (BN_is_one(D))
-				{
-				if (!BN_add(tmp,X,Y)) goto err;
-				}
-			else
-				{
-				if (BN_is_word(D,2))
-					{
-					if (!BN_lshift1(tmp,X)) goto err;
-					}
-				else if (BN_is_word(D,4))
-					{
-					if (!BN_lshift(tmp,X,2)) goto err;
-					}
-				else if (D->top == 1)
-					{
-					if (!BN_copy(tmp,X)) goto err;
-					if (!BN_mul_word(tmp,D->d[0])) goto err;
-					}
-				else
-					{
-					if (!BN_mul(tmp,D,X,ctx)) goto err;
-					}
-				if (!BN_add(tmp,tmp,Y)) goto err;
-				}
-			
-			M=Y; /* keep the BIGNUM object, the value does not matter */
-			Y=X;
-			X=tmp;
-			sign = -sign;
-			}
-		}
-		
-	/*
-	 * The while loop (Euclid's algorithm) ends when
-	 *      A == gcd(a,n);
-	 * we have
-	 *       sign*Y*a  ==  A  (mod |n|),
-	 * where  Y  is non-negative.
-	 */
-
-	if (sign < 0)
-		{
-		if (!BN_sub(Y,n,Y)) goto err;
-		}
-	/* Now  Y*a  ==  A  (mod |n|).  */
-	
-
-	if (BN_is_one(A))
-		{
-		/* Y*a == 1  (mod |n|) */
-		if (!Y->neg && BN_ucmp(Y,n) < 0)
-			{
-			if (!BN_copy(R,Y)) goto err;
-			}
-		else
-			{
-			if (!BN_nnmod(R,Y,n,ctx)) goto err;
-			}
-		}
-	else
-		{
-		BNerr(BN_F_BN_MOD_INVERSE,BN_R_NO_INVERSE);
-		goto err;
-		}
-	ret=R;
-err:
-	if ((ret == NULL) && (in == NULL)) BN_free(R);
-	BN_CTX_end(ctx);
-	bn_check_top(ret);
-	return(ret);
-	}
-
-
-/* BN_mod_inverse_no_branch is a special version of BN_mod_inverse. 
- * It does not contain branches that may leak sensitive information.
- */
-static BIGNUM *BN_mod_inverse_no_branch(BIGNUM *in,
-	const BIGNUM *a, const BIGNUM *n, BN_CTX *ctx)
-	{
-	BIGNUM *A,*B,*X,*Y,*M,*D,*T,*R=NULL;
-	BIGNUM local_A, local_B;
-	BIGNUM *pA, *pB;
-	BIGNUM *ret=NULL;
-	int sign;
-
-	bn_check_top(a);
-	bn_check_top(n);
-
-	BN_CTX_start(ctx);
-	A = BN_CTX_get(ctx);
-	B = BN_CTX_get(ctx);
-	X = BN_CTX_get(ctx);
-	D = BN_CTX_get(ctx);
-	M = BN_CTX_get(ctx);
-	Y = BN_CTX_get(ctx);
-	T = BN_CTX_get(ctx);
-	if (T == NULL) goto err;
-
-	if (in == NULL)
-		R=BN_new();
-	else
-		R=in;
-	if (R == NULL) goto err;
-
-	BN_one(X);
-	BN_zero(Y);
-	if (BN_copy(B,a) == NULL) goto err;
-	if (BN_copy(A,n) == NULL) goto err;
-	A->neg = 0;
-
-	if (B->neg || (BN_ucmp(B, A) >= 0))
-		{
-		/* Turn BN_FLG_CONSTTIME flag on, so that when BN_div is invoked,
-	 	 * BN_div_no_branch will be called eventually.
-	 	 */
-		pB = &local_B;
-		BN_with_flags(pB, B, BN_FLG_CONSTTIME);	
-		if (!BN_nnmod(B, pB, A, ctx)) goto err;
-		}
-	sign = -1;
-	/* From  B = a mod |n|,  A = |n|  it follows that
-	 *
-	 *      0 <= B < A,
-	 *     -sign*X*a  ==  B   (mod |n|),
-	 *      sign*Y*a  ==  A   (mod |n|).
-	 */
-
-	while (!BN_is_zero(B))
-		{
-		BIGNUM *tmp;
-		
-		/*
-		 *      0 < B < A,
-		 * (*) -sign*X*a  ==  B   (mod |n|),
-		 *      sign*Y*a  ==  A   (mod |n|)
-		 */
-
-		/* Turn BN_FLG_CONSTTIME flag on, so that when BN_div is invoked,
-	 	 * BN_div_no_branch will be called eventually.
-	 	 */
-		pA = &local_A;
-		BN_with_flags(pA, A, BN_FLG_CONSTTIME);	
-		
-		/* (D, M) := (A/B, A%B) ... */		
-		if (!BN_div(D,M,pA,B,ctx)) goto err;
-		
-		/* Now
-		 *      A = D*B + M;
-		 * thus we have
-		 * (**)  sign*Y*a  ==  D*B + M   (mod |n|).
-		 */
-		
-		tmp=A; /* keep the BIGNUM object, the value does not matter */
-		
-		/* (A, B) := (B, A mod B) ... */
-		A=B;
-		B=M;
-		/* ... so we have  0 <= B < A  again */
-		
-		/* Since the former  M  is now  B  and the former  B  is now  A,
-		 * (**) translates into
-		 *       sign*Y*a  ==  D*A + B    (mod |n|),
-		 * i.e.
-		 *       sign*Y*a - D*A  ==  B    (mod |n|).
-		 * Similarly, (*) translates into
-		 *      -sign*X*a  ==  A          (mod |n|).
-		 *
-		 * Thus,
-		 *   sign*Y*a + D*sign*X*a  ==  B  (mod |n|),
-		 * i.e.
-		 *        sign*(Y + D*X)*a  ==  B  (mod |n|).
-		 *
-		 * So if we set  (X, Y, sign) := (Y + D*X, X, -sign),  we arrive back at
-		 *      -sign*X*a  ==  B   (mod |n|),
-		 *       sign*Y*a  ==  A   (mod |n|).
-		 * Note that  X  and  Y  stay non-negative all the time.
-		 */
-			
-		if (!BN_mul(tmp,D,X,ctx)) goto err;
-		if (!BN_add(tmp,tmp,Y)) goto err;
-
-		M=Y; /* keep the BIGNUM object, the value does not matter */
-		Y=X;
-		X=tmp;
-		sign = -sign;
-		}
-		
-	/*
-	 * The while loop (Euclid's algorithm) ends when
-	 *      A == gcd(a,n);
-	 * we have
-	 *       sign*Y*a  ==  A  (mod |n|),
-	 * where  Y  is non-negative.
-	 */
-
-	if (sign < 0)
-		{
-		if (!BN_sub(Y,n,Y)) goto err;
-		}
-	/* Now  Y*a  ==  A  (mod |n|).  */
-
-	if (BN_is_one(A))
-		{
-		/* Y*a == 1  (mod |n|) */
-		if (!Y->neg && BN_ucmp(Y,n) < 0)
-			{
-			if (!BN_copy(R,Y)) goto err;
-			}
-		else
-			{
-			if (!BN_nnmod(R,Y,n,ctx)) goto err;
-			}
-		}
-	else
-		{
-		BNerr(BN_F_BN_MOD_INVERSE_NO_BRANCH,BN_R_NO_INVERSE);
-		goto err;
-		}
-	ret=R;
-err:
-	if ((ret == NULL) && (in == NULL)) BN_free(R);
-	BN_CTX_end(ctx);
-	bn_check_top(ret);
-	return(ret);
-	}