Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/bn/bn_add.c

Index: openssl/crypto/bn/bn_add.c
diff --git a/openssl/crypto/bn/bn_add.c b/openssl/crypto/bn/bn_add.c
deleted file mode 100644
index 9405163706aae5dc8064780a2ce879fece80ccdf..0000000000000000000000000000000000000000
--- a/openssl/crypto/bn/bn_add.c
+++ /dev/null
@@ -1,313 +0,0 @@
-/* crypto/bn/bn_add.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.]
- */
-
-#include <stdio.h>
-#include "cryptlib.h"
-#include "bn_lcl.h"
-
-/* r can == a or b */
-int BN_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
-	{
-	const BIGNUM *tmp;
-	int a_neg = a->neg, ret;
-
-	bn_check_top(a);
-	bn_check_top(b);
-
-	/*  a +  b	a+b
-	 *  a + -b	a-b
-	 * -a +  b	b-a
-	 * -a + -b	-(a+b)
-	 */
-	if (a_neg ^ b->neg)
-		{
-		/* only one is negative */
-		if (a_neg)
-			{ tmp=a; a=b; b=tmp; }
-
-		/* we are now a - b */
-
-		if (BN_ucmp(a,b) < 0)
-			{
-			if (!BN_usub(r,b,a)) return(0);
-			r->neg=1;
-			}
-		else
-			{
-			if (!BN_usub(r,a,b)) return(0);
-			r->neg=0;
-			}
-		return(1);
-		}
-
-	ret = BN_uadd(r,a,b);
-	r->neg = a_neg;
-	bn_check_top(r);
-	return ret;
-	}
-
-/* unsigned add of b to a */
-int BN_uadd(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
-	{
-	int max,min,dif;
-	BN_ULONG *ap,*bp,*rp,carry,t1,t2;
-	const BIGNUM *tmp;
-
-	bn_check_top(a);
-	bn_check_top(b);
-
-	if (a->top < b->top)
-		{ tmp=a; a=b; b=tmp; }
-	max = a->top;
-	min = b->top;
-	dif = max - min;
-
-	if (bn_wexpand(r,max+1) == NULL)
-		return 0;
-
-	r->top=max;
-
-
-	ap=a->d;
-	bp=b->d;
-	rp=r->d;
-
-	carry=bn_add_words(rp,ap,bp,min);
-	rp+=min;
-	ap+=min;
-	bp+=min;
-
-	if (carry)
-		{
-		while (dif)
-			{
-			dif--;
-			t1 = *(ap++);
-			t2 = (t1+1) & BN_MASK2;
-			*(rp++) = t2;
-			if (t2)
-				{
-				carry=0;
-				break;
-				}
-			}
-		if (carry)
-			{
-			/* carry != 0 => dif == 0 */
-			*rp = 1;
-			r->top++;
-			}
-		}
-	if (dif && rp != ap)
-		while (dif--)
-			/* copy remaining words if ap != rp */
-			*(rp++) = *(ap++);
-	r->neg = 0;
-	bn_check_top(r);
-	return 1;
-	}
-
-/* unsigned subtraction of b from a, a must be larger than b. */
-int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
-	{
-	int max,min,dif;
-	register BN_ULONG t1,t2,*ap,*bp,*rp;
-	int i,carry;
-#if defined(IRIX_CC_BUG) && !defined(LINT)
-	int dummy;
-#endif
-
-	bn_check_top(a);
-	bn_check_top(b);
-
-	max = a->top;
-	min = b->top;
-	dif = max - min;
-
-	if (dif < 0)	/* hmm... should not be happening */
-		{
-		BNerr(BN_F_BN_USUB,BN_R_ARG2_LT_ARG3);
-		return(0);
-		}
-
-	if (bn_wexpand(r,max) == NULL) return(0);
-
-	ap=a->d;
-	bp=b->d;
-	rp=r->d;
-
-#if 1
-	carry=0;
-	for (i = min; i != 0; i--)
-		{
-		t1= *(ap++);
-		t2= *(bp++);
-		if (carry)
-			{
-			carry=(t1 <= t2);
-			t1=(t1-t2-1)&BN_MASK2;
-			}
-		else
-			{
-			carry=(t1 < t2);
-			t1=(t1-t2)&BN_MASK2;
-			}
-#if defined(IRIX_CC_BUG) && !defined(LINT)
-		dummy=t1;
-#endif
-		*(rp++)=t1&BN_MASK2;
-		}
-#else
-	carry=bn_sub_words(rp,ap,bp,min);
-	ap+=min;
-	bp+=min;
-	rp+=min;
-#endif
-	if (carry) /* subtracted */
-		{
-		if (!dif)
-			/* error: a < b */
-			return 0;
-		while (dif)
-			{
-			dif--;
-			t1 = *(ap++);
-			t2 = (t1-1)&BN_MASK2;
-			*(rp++) = t2;
-			if (t1)
-				break;
-			}
-		}
-#if 0
-	memcpy(rp,ap,sizeof(*rp)*(max-i));
-#else
-	if (rp != ap)
-		{
-		for (;;)
-			{
-			if (!dif--) break;
-			rp[0]=ap[0];
-			if (!dif--) break;
-			rp[1]=ap[1];
-			if (!dif--) break;
-			rp[2]=ap[2];
-			if (!dif--) break;
-			rp[3]=ap[3];
-			rp+=4;
-			ap+=4;
-			}
-		}
-#endif
-
-	r->top=max;
-	r->neg=0;
-	bn_correct_top(r);
-	return(1);
-	}
-
-int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
-	{
-	int max;
-	int add=0,neg=0;
-	const BIGNUM *tmp;
-
-	bn_check_top(a);
-	bn_check_top(b);
-
-	/*  a -  b	a-b
-	 *  a - -b	a+b
-	 * -a -  b	-(a+b)
-	 * -a - -b	b-a
-	 */
-	if (a->neg)
-		{
-		if (b->neg)
-			{ tmp=a; a=b; b=tmp; }
-		else
-			{ add=1; neg=1; }
-		}
-	else
-		{
-		if (b->neg) { add=1; neg=0; }
-		}
-
-	if (add)
-		{
-		if (!BN_uadd(r,a,b)) return(0);
-		r->neg=neg;
-		return(1);
-		}
-
-	/* We are actually doing a - b :-) */
-
-	max=(a->top > b->top)?a->top:b->top;
-	if (bn_wexpand(r,max) == NULL) return(0);
-	if (BN_ucmp(a,b) < 0)
-		{
-		if (!BN_usub(r,b,a)) return(0);
-		r->neg=1;
-		}
-	else
-		{
-		if (!BN_usub(r,a,b)) return(0);
-		r->neg=0;
-		}
-	bn_check_top(r);
-	return(1);
-	}
-