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| Source at commit 606 created 13 years 5 months ago. By meklort, Kext patcher update. Can now patch both the gma950 binary and plist in mem. Will add error detections and device id detection to determine if a patch is required | |
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| 1 | /*␊ |
| 2 | * hex_editor.c␊ |
| 3 | * ␊ |
| 4 | *␊ |
| 5 | * Created by Meklort on 10/19/10.␊ |
| 6 | * Copyright 2010 Evan Lojewski. All rights reserved.␊ |
| 7 | *␊ |
| 8 | */␊ |
| 9 | ␊ |
| 10 | #include "hex_editor.h"␊ |
| 11 | ␊ |
| 12 | int replace_patern(char* pattern, char* replacement, char* buffer, long buffer_size)␊ |
| 13 | {␊ |
| 14 | ␉long index = 0;␊ |
| 15 | ␉int num_replaced = 0;␊ |
| 16 | ␉// NOTE: patehrn and replacement are null terminated. This may change later␊ |
| 17 | ␉// If I need to replce null bytes␊ |
| 18 | ␉␊ |
| 19 | ␉if(!pattern || ␊ |
| 20 | ␉ !replacement ||␊ |
| 21 | ␉ !buffer ||␊ |
| 22 | ␉ strlen(pattern) != strlen(replacement)␊ |
| 23 | ␉ ) return 0;␊ |
| 24 | ␉␊ |
| 25 | ␉␊ |
| 26 | ␉while(index < buffer_size - strlen(pattern))␊ |
| 27 | ␉{␊ |
| 28 | ␉␉bool located = true;␊ |
| 29 | ␉␉int i = 0;␊ |
| 30 | ␉␉while(located && i < strlen(pattern))␊ |
| 31 | ␉␉{␊ |
| 32 | ␉␉␉if(pattern[i] != buffer[i + index]) located = false;␊ |
| 33 | ␉␉␉i++;␊ |
| 34 | ␉␉}␊ |
| 35 | ␉␉␊ |
| 36 | ␉␉if(located)␊ |
| 37 | ␉␉{␊ |
| 38 | ␉␉␉printf("Located patern\n");␊ |
| 39 | ␉␉␉index += strlen(pattern) - 1;␊ |
| 40 | ␉␉␉num_replaced++;␊ |
| 41 | ␉␉}␊ |
| 42 | ␉␉␊ |
| 43 | ␉␉index++;␊ |
| 44 | ␉}␊ |
| 45 | ␉␊ |
| 46 | ␉return num_replaced;␊ |
| 47 | }␊ |
| 48 | ␊ |
| 49 | ␊ |
| 50 | int replace_word(uint32_t pattern, uint32_t repalcement, char* buffer, long buffer_size)␊ |
| 51 | {␊ |
| 52 | ␉int num_replaced = 0;␊ |
| 53 | ␉char* tmp = buffer;␊ |
| 54 | ␉␊ |
| 55 | ␉if(!buffer || !buffer_size) return 0;␊ |
| 56 | ␉␊ |
| 57 | ␉␊ |
| 58 | ␉while(tmp < buffer + buffer_size - sizeof(uint32_t))␊ |
| 59 | ␉{␊ |
| 60 | ␊ |
| 61 | ␉␉uint32_t* current= (uint32_t*)tmp;␊ |
| 62 | ␉␉␊ |
| 63 | ␉␉if(*current == pattern)␊ |
| 64 | ␉␉{␊ |
| 65 | ␉␉␉*current = repalcement;␊ |
| 66 | ␉␉␉num_replaced++;␊ |
| 67 | ␉␉␉tmp += 4;␊ |
| 68 | ␉␉}␊ |
| 69 | ␉␉else ␊ |
| 70 | ␉␉{␊ |
| 71 | ␉␉␉tmp++;␊ |
| 72 | ␉␉}␊ |
| 73 | ␉}␊ |
| 74 | ␉␊ |
| 75 | ␉return num_replaced;␊ |
| 76 | }␊ |
| 77 | ␊ |
| 78 | void replace_string(char* find, char* replace, char* string)␊ |
| 79 | {␊ |
| 80 | ␉if(!find ||␊ |
| 81 | ␉ !replace ||␊ |
| 82 | ␉ !string ||␊ |
| 83 | ␉ strlen(find) != strlen(replace)) return;␊ |
| 84 | ␉␊ |
| 85 | ␉char* str = string;␊ |
| 86 | ␉while(strncmp(str, find, strlen(find)-1))␊ |
| 87 | ␉{␊ |
| 88 | ␉␉str++;␊ |
| 89 | ␉}␊ |
| 90 | ␉strncpy(str, replace, strlen(replace) - 1);␉// don't copy the null char␊ |
| 91 | }␊ |
| 92 | |
