mirror of
https://github.com/owasp-modsecurity/ModSecurity.git
synced 2025-08-16 07:56:12 +03:00
76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
/*
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* ModSecurity, http://www.modsecurity.org/
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* Copyright (c) 2015 - 2020 Trustwave Holdings, Inc. (http://www.trustwave.com/)
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*
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* You may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* If any of the files related to licensing are missing or if you have any
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* other questions related to licensing please contact Trustwave Holdings, Inc.
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* directly using the email address security@modsecurity.org.
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*
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*/
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#include "src/actions/transformations/parity_odd_7bit.h"
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#include <string>
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#include "modsecurity/modsecurity.h"
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#include "modsecurity/transaction.h"
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namespace modsecurity {
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namespace actions {
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namespace transformations {
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void ParityOdd7bit::execute(const Transaction *t,
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const ModSecString &in,
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ModSecString &out) noexcept {
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unsigned char *input;
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input = reinterpret_cast<unsigned char *>
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(malloc(sizeof(char) * in.length()+1));
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if (input == NULL) {
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return;
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}
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memcpy(input, in.c_str(), in.length()+1);
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inplace(input, in.length());
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out.assign(reinterpret_cast<char *>(input), in.length());
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free(input);
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}
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bool ParityOdd7bit::inplace(unsigned char *input, uint64_t input_len) {
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uint64_t i;
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i = 0;
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while (i < input_len) {
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unsigned int x = input[i];
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input[i] ^= input[i] >> 4;
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input[i] &= 0xf;
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if ((0x6996 >> input[i]) & 1) {
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input[i] = x & 0x7f;
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} else {
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input[i] = x | 0x80;
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}
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i++;
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}
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return true;
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}
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} // namespace transformations
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} // namespace actions
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} // namespace modsecurity
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