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* Copyright (C) 2011, Broadcom Corporation. All Rights Reserved.
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* $Id: rc4.c 326246 2012-04-06 19:08:11Z $
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#include <bcmcrypto/rc4.h>
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BCMROMFN(prepare_key)(uint8 *key_data, int key_data_len, rc4_ks_t *ks)
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unsigned int counter, index1 = 0, index2 = 0;
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uint8 *key_state = ks->state;
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for (counter = 0; counter < RC4_STATE_NBYTES; counter++) {
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key_state[counter] = (uint8) counter;
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for (counter = 0; counter < RC4_STATE_NBYTES; counter++) {
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key_byte = key_data[index1];
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index2 = (key_byte + key_state[counter] + index2) % RC4_STATE_NBYTES;
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temp = key_state[counter];
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key_state[counter] = key_state[index2];
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key_state[index2] = temp;
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index1 = (index1 + 1) % key_data_len;
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BCMROMFN(rc4)(uint8 *buf, int data_len, rc4_ks_t *ks)
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uint8 xor_ind, x = ks->x, y = ks->y, *key_state = ks->state;
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for (i = 0; i < data_len; i++) {
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key_state[x] = key_state[y];
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xor_ind = key_state[x] + key_state[y];
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buf[i] ^= key_state[xor_ind];
added
removed
src/src/bcmcrypto/rc4.c
