-
Notifications
You must be signed in to change notification settings - Fork 2
Expand file tree
/
Copy pathdecrypt.cpp
More file actions
163 lines (143 loc) · 5.17 KB
/
decrypt.cpp
File metadata and controls
163 lines (143 loc) · 5.17 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
//
// Created by Administrator on 2018/12/3.
//
#include <jvmti.h>
#include <iostream>
#include <cstring>
#include "ParseEncConfig.hpp"
using std::cout;
using std::endl;
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
void JNICALL
ClassFile_LoadHook(
jvmtiEnv *jvmti_env,
JNIEnv* jni_env,
jclass class_being_redefined,
jobject loader,
const char* name,
jobject protection_domain,
jint class_data_len,
const unsigned char* class_data,
jint* new_class_data_len,
unsigned char** new_class_data
) {
*new_class_data_len = class_data_len;
jvmti_env->Allocate(class_data_len, new_class_data);
unsigned char* my_data = *new_class_data;
// 这里会加载所有的class名，所以必须判断哪些class需要解密，不能使用loadall判断
bool encrypt = false;//ParseEncConfig::config.encFile.loadall;
if ( (!encrypt) && (NULL != name) ) {
for ( string file : ParseEncConfig::config.encFile.files ) {
int len = file.length();
while (len > 0) {
len--;
char &c = file[len];
if ('.' == c) {
c = '/';
}
}
if (0 == string(name).compare(0, file.length(), file)) {
encrypt = true;
break;
}
}
}
if( (NULL != name) && encrypt ) {
for (int i = 0; i < class_data_len; ++i) {
my_data[i] = class_data[i] ^ 0x07;
}
}else {
for (int i = 0; i < class_data_len; ++i) {
my_data[i] = class_data[i];
}
}
}
JNIEXPORT jint JNICALL
Agent_OnLoad(JavaVM *vm, char *options, void *reserved) {
jint jreturn = -1;
do {
if (NULL == options) {
options = (char*)"";
}
jvmtiEnv *jvmti = NULL;
jint rt = vm->GetEnv((void **)&jvmti, JVMTI_VERSION);
if (rt) {
cout << "getenv(&jvmti) fail, return is " << rt << endl;
jreturn = rt;
break;
} else {
jvmtiCapabilities capabilities;
memset(&capabilities, 0, sizeof(capabilities));
capabilities.can_generate_all_class_hook_events = 1;
capabilities.can_tag_objects = 1;
capabilities.can_generate_object_free_events = 1;
capabilities.can_get_source_file_name = 1;
capabilities.can_get_line_numbers = 1;
capabilities.can_generate_vm_object_alloc_events = 1;
//设置能获取哪些能力
jvmtiError err = jvmti->AddCapabilities(&capabilities);
//err = jvmti->GetCapabilities(&capabilities);
if (jvmtiError::JVMTI_ERROR_NONE != err) {
jreturn = err;
cout << "AddCapabilities fail, return is " << err << endl;
break;
}
// 读取配置文件
string xml = options == NULL ? "" : options;
if ( 0 == xml.length() ) {
xml = "enc_config.xml";
}
cout << "parse [" << xml << "]" << endl;
if ( !ParseEncConfig::parse(xml) ) {
cout << ParseEncConfig::errMsg << endl;
jreturn = -100;
break;
} else {
string text;
text.append("src=").append(ParseEncConfig::config.src).append("\n")
.append("dst=").append(ParseEncConfig::config.dst).append("\n")
.append("loadall=").append(std::to_string(ParseEncConfig::config.encFile.loadall)).append("\n")
.append("files\n");
for (string s : ParseEncConfig::config.encFile.files) {
text.append(" ").append(s).append("\n");
}
cout << text << endl;
}
//设置事件回调
jvmtiEventCallbacks callbacks;
(void)memset(&callbacks,0, sizeof(callbacks));
callbacks.ClassFileLoadHook = ClassFile_LoadHook;
err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
if (jvmtiError::JVMTI_ERROR_NONE != err) {
jreturn = err;
cout << "SetEventCallbacks fail, return is " << err << endl;
break;
}
//设置事件通知
err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, NULL);
if(JVMTI_ERROR_NONE!=err){
cout << "SetEventNotificationMode fail, return is " << err << endl;
jreturn = err;
break;
}
//cout << "capabilities.can_access_local_variables = " << capabilities.can_access_local_variables << endl;
cout << " ok " << endl;
jreturn = 0;
}
cout << "Agent_OnLoad " << endl;
} while(0);
return jreturn;
}
JNIEXPORT jint JNICALL
Agent_OnAttach(JavaVM* vm, char* options, void* reserved) {
return 0;
}
JNIEXPORT void JNICALL
Agent_OnUnload(JavaVM *vm) {
//cout << "---------- Agent_OnUnload ----------" << endl;
}
#ifdef __cplusplus
}
#endif // __cplusplus