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77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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This file is part of Pretty Curved Privacy (pcp1).
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Copyright (C) 2013 T. von Dein.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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You can contact me by mail: <tlinden AT cpan DOT org>.
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*/
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#include "util.h"
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/* lowercase a string */
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char *_lc(char *in) {
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size_t len = strlen(in);
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size_t i;
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for(i=0; i<len; ++i)
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in[i] = towlower(in[i]);
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return in;
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}
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/* find the offset of the beginning of a certain string within binary data */
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size_t _findoffset(unsigned char *bin, size_t binlen, char *sigstart, size_t hlen) {
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size_t i;
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size_t offset = 0;
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int m = 0;
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for(i=0; i<binlen-hlen; ++i) {
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if(memcmp(&bin[i], sigstart, hlen) == 0) {
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offset = i;
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m = 1;
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break;
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}
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}
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if(m == 0)
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offset = -1;
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return offset;
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}
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/* xor 2 likesized buffers */
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void _xorbuf(unsigned char *iv, unsigned char *buf, size_t xlen) {
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size_t i;
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for (i = 0; i < xlen; ++i)
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buf[i] = iv[i] ^ buf[i];
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}
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/* print some binary data to stderr */
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void _dump(char *n, unsigned char *d, size_t s) {
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int l = strlen(n) + 9;
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fprintf(stderr, "%s (%04ld): ", n, s);
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size_t i;
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int c;
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for (i=0; i<s; ++i) {
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fprintf(stderr, "%02x", d[i]);
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if(i % 36 == 35 && i > 0) {
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fprintf(stderr, "\n");
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for(c=0; c<l; ++c)
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fprintf(stderr, " ");
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}
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}
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fprintf(stderr, "\n");
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}
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