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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/*
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* Copyright (c) 2006 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
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*
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* Permission to use, copy, modify, and 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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*
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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
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* ANY 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
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <string.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include "md5.h"
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/* Needs a 16byte array for output, and 32 bytes password */
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void login_calculate(char *out, int len, char *pass, int seed) {
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char temp[32];
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md5_state_t ctx;
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int i;
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int k;
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int *ix;
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if (len < 16) {
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return;
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}
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memcpy(temp, pass, 32);
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ix = (int*) temp;
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for (i = 0; i < 8; i++) {
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k = ntohl(*ix);
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k ^= seed;
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*ix++ = htonl(k);
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}
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md5_init(&ctx);
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md5_append(&ctx, temp, 32);
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md5_finish(&ctx, out);
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}
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