Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/modes/ctr128.c

Index: openssl/crypto/modes/ctr128.c
diff --git a/openssl/crypto/modes/ctr128.c b/openssl/crypto/modes/ctr128.c
deleted file mode 100644
index ee642c5863cd38fe21ddef6b4727c2e3047656d3..0000000000000000000000000000000000000000
--- a/openssl/crypto/modes/ctr128.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/* ====================================================================
- * Copyright (c) 2008 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.
- * ====================================================================
- *
- */
-
-#include <openssl/crypto.h>
-#include "modes_lcl.h"
-#include <string.h>
-
-#ifndef MODES_DEBUG
-# ifndef NDEBUG
-#  define NDEBUG
-# endif
-#endif
-#include <assert.h>
-
-/* NOTE: the IV/counter CTR mode is big-endian.  The code itself
- * is endian-neutral. */
-
-/* increment counter (128-bit int) by 1 */
-static void ctr128_inc(unsigned char *counter) {
-	u32 n=16;
-	u8  c;
-
-	do {
-		--n;
-		c = counter[n];
-		++c;
-		counter[n] = c;
-		if (c) return;
-	} while (n);
-}
-
-#if !defined(OPENSSL_SMALL_FOOTPRINT)
-static void ctr128_inc_aligned(unsigned char *counter) {
-	size_t *data,c,n;
-	const union { long one; char little; } is_endian = {1};
-
-	if (is_endian.little) {
-		ctr128_inc(counter);
-		return;
-	}
-
-	data = (size_t *)counter;
-	n = 16/sizeof(size_t);
-	do {
-		--n;
-		c = data[n];
-		++c;
-		data[n] = c;
-		if (c) return;
-	} while (n);
-}
-#endif
-
-/* The input encrypted as though 128bit counter mode is being
- * used.  The extra state information to record how much of the
- * 128bit block we have used is contained in *num, and the
- * encrypted counter is kept in ecount_buf.  Both *num and
- * ecount_buf must be initialised with zeros before the first
- * call to CRYPTO_ctr128_encrypt().
- *
- * This algorithm assumes that the counter is in the x lower bits
- * of the IV (ivec), and that the application has full control over
- * overflow and the rest of the IV.  This implementation takes NO
- * responsability for checking that the counter doesn't overflow
- * into the rest of the IV when incremented.
- */
-void CRYPTO_ctr128_encrypt(const unsigned char *in, unsigned char *out,
-			size_t len, const void *key,
-			unsigned char ivec[16], unsigned char ecount_buf[16],
-			unsigned int *num, block128_f block)
-{
-	unsigned int n;
-	size_t l=0;
-
-	assert(in && out && key && ecount_buf && num);
-	assert(*num < 16);
-
-	n = *num;
-
-#if !defined(OPENSSL_SMALL_FOOTPRINT)
-	if (16%sizeof(size_t) == 0) do { /* always true actually */
-		while (n && len) {
-			*(out++) = *(in++) ^ ecount_buf[n];
-			--len;
-			n = (n+1) % 16;
-		}
-
-#if defined(STRICT_ALIGNMENT)
-		if (((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0)
-			break;
-#endif
-		while (len>=16) {
-			(*block)(ivec, ecount_buf, key);
-			ctr128_inc_aligned(ivec);
-			for (; n<16; n+=sizeof(size_t))
-				*(size_t *)(out+n) =
-				*(size_t *)(in+n) ^ *(size_t *)(ecount_buf+n);
-			len -= 16;
-			out += 16;
-			in  += 16;
-			n = 0;
-		}
-		if (len) {
-			(*block)(ivec, ecount_buf, key);
- 			ctr128_inc_aligned(ivec);
-			while (len--) {
-				out[n] = in[n] ^ ecount_buf[n];
-				++n;
-			}
-		}
-		*num = n;
-		return;
-	} while(0);
-	/* the rest would be commonly eliminated by x86* compiler */
-#endif
-	while (l<len) {
-		if (n==0) {
-			(*block)(ivec, ecount_buf, key);
- 			ctr128_inc(ivec);
-		}
-		out[l] = in[l] ^ ecount_buf[n];
-		++l;
-		n = (n+1) % 16;
-	}
-
-	*num=n;
-}
-
-/* increment upper 96 bits of 128-bit counter by 1 */
-static void ctr96_inc(unsigned char *counter) {
-	u32 n=12;
-	u8  c;
-
-	do {
-		--n;
-		c = counter[n];
-		++c;
-		counter[n] = c;
-		if (c) return;
-	} while (n);
-}
-
-void CRYPTO_ctr128_encrypt_ctr32(const unsigned char *in, unsigned char *out,
-			size_t len, const void *key,
-			unsigned char ivec[16], unsigned char ecount_buf[16],
-			unsigned int *num, ctr128_f func)
-{
-	unsigned int n,ctr32;
-
-	assert(in && out && key && ecount_buf && num);
-	assert(*num < 16);
-
-	n = *num;
-
-	while (n && len) {
-		*(out++) = *(in++) ^ ecount_buf[n];
-		--len;
-		n = (n+1) % 16;
-	}
-
-	ctr32 = GETU32(ivec+12);
-	while (len>=16) {
-		size_t blocks = len/16;
-		/*
-		 * 1<<28 is just a not-so-small yet not-so-large number...
-		 * Below condition is practically never met, but it has to
-		 * be checked for code correctness.
-		 */
-		if (sizeof(size_t)>sizeof(unsigned int) && blocks>(1U<<28))
-			blocks = (1U<<28);
-		/*
-		 * As (*func) operates on 32-bit counter, caller
-		 * has to handle overflow. 'if' below detects the
-		 * overflow, which is then handled by limiting the
-		 * amount of blocks to the exact overflow point...
-		 */
-		ctr32 += (u32)blocks;
-		if (ctr32 < blocks) {
-			blocks -= ctr32;
-			ctr32   = 0;
-		}
-		(*func)(in,out,blocks,key,ivec);
-		/* (*ctr) does not update ivec, caller does: */
-		PUTU32(ivec+12,ctr32);
-		/* ... overflow was detected, propogate carry. */
-		if (ctr32 == 0)	ctr96_inc(ivec);
-		blocks *= 16;
-		len -= blocks;
-		out += blocks;
-		in  += blocks;
-	}
-	if (len) {
-		memset(ecount_buf,0,16);
-		(*func)(ecount_buf,ecount_buf,1,key,ivec);
-		++ctr32;
-		PUTU32(ivec+12,ctr32);
-		if (ctr32 == 0)	ctr96_inc(ivec);
-		while (len--) {
-			out[n] = in[n] ^ ecount_buf[n];
-			++n;
-		}
-	}
-
-	*num=n;
-}