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40 results

libhogweed.map.in

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  • Forked from Nettle / nettle
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    • Nikos Mavrogiannopoulos's avatar
      da81c86a
      abi: explicitly export intended symbols and hide others · da81c86a
      Nikos Mavrogiannopoulos authored and Niels Möller's avatar Niels Möller committed
      This adds all exported symbols in the map files explicitly under
      the following rules:
       - Symbols mentioned in internal headers go in a section which is
         valid only for testing, and linking with these symbols will break
         in library updates.
       - Symbols mentioned in installed headers go in the exported sections
         and are considered part of the ABI.
       - All internal symbols move to internal headers.
       - The _nettle_md5_compress and _nettle_sha1_compress become exported
         without the _nettle prefix, due to existing usage.
      da81c86a
      History
      abi: explicitly export intended symbols and hide others
      Nikos Mavrogiannopoulos authored and Niels Möller's avatar Niels Möller committed
      This adds all exported symbols in the map files explicitly under
      the following rules:
       - Symbols mentioned in internal headers go in a section which is
         valid only for testing, and linking with these symbols will break
         in library updates.
       - Symbols mentioned in installed headers go in the exported sections
         and are considered part of the ABI.
       - All internal symbols move to internal headers.
       - The _nettle_md5_compress and _nettle_sha1_compress become exported
         without the _nettle prefix, due to existing usage.
    aes-encrypt-internal.c 3.12 KiB
    /* aes-encrypt-internal.c
    
       Encryption function for the aes/rijndael block cipher.
    
       Copyright (C) 2002, 2013 Niels Möller
    
       This file is part of GNU Nettle.
    
       GNU Nettle is free software: you can redistribute it and/or
       modify it under the terms of either:
    
         * the GNU Lesser General Public License as published by the Free
           Software Foundation; either version 3 of the License, or (at your
           option) any later version.
    
       or
    
         * the GNU General Public License as published by the Free
           Software Foundation; either version 2 of the License, or (at your
           option) any later version.
    
       or both in parallel, as here.
    
       GNU Nettle is distributed in the hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       General Public License for more details.
    
       You should have received copies of the GNU General Public License and
       the GNU Lesser General Public License along with this program.  If
       not, see http://www.gnu.org/licenses/.
    */
    
    #if HAVE_CONFIG_H
    # include "config.h"
    #endif
    
    #include <assert.h>
    
    #include "aes-internal.h"
    #include "macros.h"
    
    void
    _nettle_aes_encrypt(unsigned rounds, const uint32_t *keys,
    		    const struct aes_table *T,
    		    size_t length, uint8_t *dst,
    		    const uint8_t *src)
    {
      FOR_BLOCKS(length, dst, src, AES_BLOCK_SIZE)
        {
          uint32_t w0, w1, w2, w3;		/* working ciphertext */
          uint32_t t0, t1, t2, t3;
          unsigned i;
          
          /* Get clear text, using little-endian byte order.
           * Also XOR with the first subkey. */
    
          w0 = LE_READ_UINT32(src)      ^ keys[0];
          w1 = LE_READ_UINT32(src + 4)  ^ keys[1];
          w2 = LE_READ_UINT32(src + 8)  ^ keys[2];
          w3 = LE_READ_UINT32(src + 12) ^ keys[3];
    
          for (i = 1; i < rounds; i++)
    	{
    	  t0 = AES_ROUND(T, w0, w1, w2, w3, keys[4*i]);
    	  t1 = AES_ROUND(T, w1, w2, w3, w0, keys[4*i + 1]);
    	  t2 = AES_ROUND(T, w2, w3, w0, w1, keys[4*i + 2]);
    	  t3 = AES_ROUND(T, w3, w0, w1, w2, keys[4*i + 3]);
    
    	  /* We could unroll the loop twice, to avoid these
    	     assignments. If all eight variables fit in registers,
    	     that should give a slight speedup. */
    	  w0 = t0;
    	  w1 = t1;
    	  w2 = t2;
    	  w3 = t3;
    	}
    
          /* Final round */
    
          t0 = AES_FINAL_ROUND(T, w0, w1, w2, w3, keys[4*i]);
          t1 = AES_FINAL_ROUND(T, w1, w2, w3, w0, keys[4*i + 1]);
          t2 = AES_FINAL_ROUND(T, w2, w3, w0, w1, keys[4*i + 2]);
          t3 = AES_FINAL_ROUND(T, w3, w0, w1, w2, keys[4*i + 3]);
    
          LE_WRITE_UINT32(dst, t0);
          LE_WRITE_UINT32(dst + 4, t1);
          LE_WRITE_UINT32(dst + 8, t2);
          LE_WRITE_UINT32(dst + 12, t3);
        }
    }
    
    /* Some stats, all for AES 128:
    
       A. Table-driven indexing (the approach of the old unified
          _aes_crypt function).
       B. Unrolling the j-loop.
    
       C. Eliminated the use of IDXk(j) in the main loop.
    
       D. Put wtxt in four scalar variables.
    
       E. Also put t in four scalar variables.
    
           P4 2.2 GHz         AMD Duron 1.4GHz
           
           MB/s  code size
       A   35.9  0x202        17 MB/s
       B   37.3  0x334
       C   33.0  0x2a7
       D   40.7  0x3f9
       E   42.9  0x44a        26 MB/s
     */