From f9158592e1478b2013afc7041d9ed041cf2d2f4a Mon Sep 17 00:00:00 2001 From: David Walter Seikel Date: Mon, 13 Jan 2014 19:47:58 +1000 Subject: Update Irrlicht to 1.8.1. Include actual change markers this time. lol --- .../source/Irrlicht/aesGladman/prng.cpp | 146 --------------------- 1 file changed, 146 deletions(-) delete mode 100644 libraries/irrlicht-1.8/source/Irrlicht/aesGladman/prng.cpp (limited to 'libraries/irrlicht-1.8/source/Irrlicht/aesGladman/prng.cpp') diff --git a/libraries/irrlicht-1.8/source/Irrlicht/aesGladman/prng.cpp b/libraries/irrlicht-1.8/source/Irrlicht/aesGladman/prng.cpp deleted file mode 100644 index 708cb08..0000000 --- a/libraries/irrlicht-1.8/source/Irrlicht/aesGladman/prng.cpp +++ /dev/null @@ -1,146 +0,0 @@ -/* - --------------------------------------------------------------------------- - Copyright (c) 2002, Dr Brian Gladman < >, Worcester, UK. - All rights reserved. - - LICENSE TERMS - - The free distribution and use of this software in both source and binary - form is allowed (with or without changes) provided that: - - 1. distributions of this source code include the above copyright - notice, this list of conditions and the following disclaimer; - - 2. distributions in binary form include the above copyright - notice, this list of conditions and the following disclaimer - in the documentation and/or other associated materials; - - 3. the copyright holder's name is not used to endorse products - built using this software without specific written permission. - - ALTERNATIVELY, provided that this notice is retained in full, this product - may be distributed under the terms of the GNU General Public License (GPL), - in which case the provisions of the GPL apply INSTEAD OF those given above. - - DISCLAIMER - - This software is provided 'as is' with no explicit or implied warranties - in respect of its properties, including, but not limited to, correctness - and/or fitness for purpose. - --------------------------------------------------------------------------- - Issue Date: 24/01/2003 - - This file implements a random data pool based on the use of an external - entropy function. It is based on the ideas advocated by Peter Gutmann in - his work on pseudo random sequence generators. It is not a 'paranoid' - random sequence generator and no attempt is made to protect the pool - from prying eyes either by memory locking or by techniques to obscure - its location in memory. -*/ - -#include -#include "prng.h" - -/* mix a random data pool using the SHA1 compression function (as */ -/* suggested by Peter Gutmann in his paper on random pools) */ - -static void prng_mix(unsigned char buf[]) -{ unsigned int i, len; - sha1_ctx ctx[1]; - - /*lint -e{663} unusual array to pointer conversion */ - for(i = 0; i < PRNG_POOL_SIZE; i += SHA1_DIGEST_SIZE) - { - /* copy digest size pool block into SHA1 hash block */ - memcpy(ctx->hash, buf + (i ? i : PRNG_POOL_SIZE) - - SHA1_DIGEST_SIZE, SHA1_DIGEST_SIZE); - - /* copy data from pool into the SHA1 data buffer */ - len = PRNG_POOL_SIZE - i; - memcpy(ctx->wbuf, buf + i, (len > SHA1_BLOCK_SIZE ? SHA1_BLOCK_SIZE : len)); - - if(len < SHA1_BLOCK_SIZE) - memcpy(((char*)ctx->wbuf) + len, buf, SHA1_BLOCK_SIZE - len); - - /* compress using the SHA1 compression function */ - sha1_compile(ctx); - - /* put digest size block back into the random pool */ - memcpy(buf + i, ctx->hash, SHA1_DIGEST_SIZE); - } -} - -/* refresh the output buffer and update the random pool by adding */ -/* entropy and remixing */ - -static void update_pool(prng_ctx ctx[1]) -{ unsigned int i = 0; - - /* transfer random pool data to the output buffer */ - memcpy(ctx->obuf, ctx->rbuf, PRNG_POOL_SIZE); - - /* enter entropy data into the pool */ - while(i < PRNG_POOL_SIZE) - i += ctx->entropy(ctx->rbuf + i, PRNG_POOL_SIZE - i); - - /* invert and xor the original pool data into the pool */ - for(i = 0; i < PRNG_POOL_SIZE; ++i) - ctx->rbuf[i] ^= ~ctx->obuf[i]; - - /* mix the pool and the output buffer */ - prng_mix(ctx->rbuf); - prng_mix(ctx->obuf); -} - -void prng_init(prng_entropy_fn fun, prng_ctx ctx[1]) -{ int i; - - /* clear the buffers and the counter in the context */ - memset(ctx, 0, sizeof(prng_ctx)); - - /* set the pointer to the entropy collection function */ - ctx->entropy = fun; - - /* initialise the random data pool */ - update_pool(ctx); - - /* mix the pool a minimum number of times */ - for(i = 0; i < PRNG_MIN_MIX; ++i) - prng_mix(ctx->rbuf); - - /* update the pool to prime the pool output buffer */ - update_pool(ctx); -} - -/* provide random bytes from the random data pool */ - -void prng_rand(unsigned char data[], unsigned int data_len, prng_ctx ctx[1]) -{ unsigned char *rp = data; - unsigned int len, pos = ctx->pos; - - while(data_len) - { - /* transfer 'data_len' bytes (or the number of bytes remaining */ - /* the pool output buffer if less) into the output */ - len = (data_len < PRNG_POOL_SIZE - pos ? data_len : PRNG_POOL_SIZE - pos); - memcpy(rp, ctx->obuf + pos, len); - rp += len; /* update ouput buffer position pointer */ - pos += len; /* update pool output buffer pointer */ - data_len -= len; /* update the remaining data count */ - - /* refresh the random pool if necessary */ - if(pos == PRNG_POOL_SIZE) - { - update_pool(ctx); pos = 0; - } - } - - ctx->pos = pos; -} - -void prng_end(prng_ctx ctx[1]) -{ - /* ensure the data in the context is destroyed */ - memset(ctx, 0, sizeof(prng_ctx)); -} - -- cgit v1.1