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https://github.com/etaHEN/etaHEN.git
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84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/* Copyright (C) 2025 etaHEN / LightningMods
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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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; see the file COPYING. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "mc4/mc4decrypter.h"
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#include <stdio.h>
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const unsigned char MC4_AES256CBC_KEY[] = "304c6528f659c766110239a51cl5dd9c";
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const unsigned char MC4_AES256CBC_IV[] = "u@}kzW2u[u(8DWar";
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void etaHEN_log(const char* format, ...);
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uint8_t* decrypt_data(uint8_t* data, size_t* size)
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{
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uint8_t* bin_data;
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size_t bin_size;
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struct AES_ctx ctx;
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etaHEN_log("[*] Base64 Encoded Size: %zu bytes", *size);
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bin_data = base64_decode(data, *size, &bin_size);
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if (!bin_data)
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{
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etaHEN_log("Base64 Error!");
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return data;
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}
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*size = bin_size;
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//
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// This avoid the heap overflow caused by the AES_CBC_decrypt_buffer
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//
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size_t new_buff_size = bin_size + 0x100;
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uint8_t* bin_data_2 = calloc(new_buff_size, sizeof(uint8_t));
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memcpy(bin_data_2, bin_data, bin_size);
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free(bin_data);
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bin_data = bin_data_2;
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etaHEN_log("[*] Total Decrypted Size: %zu bytes", bin_size);
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AES_init_ctx_iv(&ctx, MC4_AES256CBC_KEY, MC4_AES256CBC_IV);
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AES_CBC_decrypt_buffer(&ctx, bin_data, bin_size);
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etaHEN_log("[*] Decrypted File Successfully!");
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return bin_data;
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}
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uint8_t* encrypt_data(uint8_t* data, size_t* size)
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{
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uint8_t* b64_data;
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size_t b64_size;
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struct AES_ctx ctx;
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etaHEN_log("[*] Total XML Size: %zu bytes", *size);
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AES_init_ctx_iv(&ctx, MC4_AES256CBC_KEY, MC4_AES256CBC_IV);
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AES_CBC_encrypt_buffer(&ctx, data, *size);
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b64_data = base64_encode(data, *size, &b64_size);
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if (!b64_data)
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{
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etaHEN_log("Base64 Error!");
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return data;
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}
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*size = b64_size;
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etaHEN_log("[*] Total Encrypted Size: %zu bytes", b64_size);
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etaHEN_log("[*] Encrypted File Successfully!");
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return b64_data;
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} |