mirror of https://github.com/jackwener/wx-cli.git
feat: add macOS C memory key scanner
Scans WeChat process memory for SQLCipher encryption keys using Mach VM API. Outputs all_keys.json compatible with decrypt_db.py. Build: cc -O2 -o find_all_keys_macos find_all_keys_macos.c -framework Foundation Usage: sudo ./find_all_keys_macos [pid]feat/daemon-cli
bbingz
parent
24ae180669
commit
1f9ca3792a
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@ -162,6 +162,7 @@ python find_image_key.py
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| `find_image_key.py` | 从微信进程内存提取图片 AES 密钥 |
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| `find_image_key_monitor.py` | 持续监控版密钥提取（推荐） |
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| `latency_test.py` | 延迟测量诊断工具 |
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| `find_all_keys_macos.c` | macOS 版内存密钥扫描器 (C, Mach VM API) |
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## 技术细节
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@ -0,0 +1,293 @@
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/*
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* find_all_keys_macos.c - macOS WeChat memory key scanner
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*
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* Scans WeChat process memory for SQLCipher encryption keys in the
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* x'<key_hex><salt_hex>' format used by WeChat 4.x on macOS.
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*
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* Prerequisites:
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* - WeChat must be ad-hoc signed (or SIP disabled)
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* - Must run as root (sudo)
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*
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* Build:
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* cc -O2 -o find_all_keys_macos find_all_keys_macos.c -framework Foundation
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*
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* Usage:
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* sudo ./find_all_keys_macos [pid]
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* If pid is omitted, automatically finds WeChat PID.
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*
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* Output: JSON file at ./all_keys.json (compatible with decrypt_db.py)
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <glob.h>
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#include <pwd.h>
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#include <mach/mach.h>
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#include <mach/mach_vm.h>
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#define MAX_KEYS 256
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#define KEY_SIZE 32
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#define SALT_SIZE 16
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#define HEX_PATTERN_LEN 96 /* 64 hex (key) + 32 hex (salt) */
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#define CHUNK_SIZE (2 * 1024 * 1024)
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typedef struct {
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char key_hex[65];
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char salt_hex[33];
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char full_pragma[100];
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} key_entry_t;
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static int is_hex_char(unsigned char c) {
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return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
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}
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static pid_t find_wechat_pid(void) {
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FILE *fp = popen("pgrep -x WeChat", "r");
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if (!fp) return -1;
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char buf[64];
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pid_t pid = -1;
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if (fgets(buf, sizeof(buf), fp))
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pid = atoi(buf);
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pclose(fp);
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return pid;
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}
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/* Read DB salt (first 16 bytes) and return hex string */
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static int read_db_salt(const char *path, char *salt_hex_out) {
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FILE *f = fopen(path, "rb");
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if (!f) return -1;
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unsigned char header[16];
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if (fread(header, 1, 16, f) != 16) { fclose(f); return -1; }
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fclose(f);
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/* Check if unencrypted */
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if (memcmp(header, "SQLite format 3", 15) == 0) return -1;
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for (int i = 0; i < 16; i++)
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sprintf(salt_hex_out + i * 2, "%02x", header[i]);
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salt_hex_out[32] = '\0';
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return 0;
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}
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int main(int argc, char *argv[]) {
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pid_t pid;
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if (argc >= 2)
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pid = atoi(argv[1]);
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else
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pid = find_wechat_pid();
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if (pid <= 0) {
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fprintf(stderr, "WeChat not running or invalid PID\n");
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return 1;
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}
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printf("============================================================\n");
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printf(" macOS WeChat Memory Key Scanner (C version)\n");
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printf("============================================================\n");
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printf("WeChat PID: %d\n", pid);
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/* Get task port */
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mach_port_t task;
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kern_return_t kr = task_for_pid(mach_task_self(), pid, &task);
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if (kr != KERN_SUCCESS) {
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fprintf(stderr, "task_for_pid failed: %d\n", kr);
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fprintf(stderr, "Make sure: (1) running as root, (2) WeChat is ad-hoc signed\n");
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return 1;
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}
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printf("Got task port: %u\n", task);
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/* Resolve real user's HOME (sudo may change HOME to /var/root) */
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const char *home = getenv("HOME");
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const char *sudo_user = getenv("SUDO_USER");
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if (sudo_user) {
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struct passwd *pw = getpwnam(sudo_user);
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if (pw && pw->pw_dir)
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home = pw->pw_dir;
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}
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if (!home) home = "/root";
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printf("User home: %s\n", home);
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/* Collect DB salts */
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printf("\nScanning for DB files...\n");
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glob_t g;
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char pattern[512];
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snprintf(pattern, sizeof(pattern),
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"%s/Library/Containers/com.tencent.xinWeChat/Data/Documents/"
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"xwechat_files/*/db_storage/**/*.db",
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home);
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char db_salts[64][33];
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char db_names[64][256]; /* relative path from db_storage, e.g. "contact/contact.db" */
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int db_count = 0;
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if (glob(pattern, GLOB_NOSORT, NULL, &g) == 0) {
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for (size_t i = 0; i < g.gl_pathc && db_count < 64; i++) {
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char salt[33];
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if (read_db_salt(g.gl_pathv[i], salt) == 0) {
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strcpy(db_salts[db_count], salt);
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/* Extract relative path from db_storage/ */
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const char *rel = strstr(g.gl_pathv[i], "db_storage/");
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if (rel) rel += strlen("db_storage/");
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else {
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rel = strrchr(g.gl_pathv[i], '/');
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rel = rel ? rel + 1 : g.gl_pathv[i];
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}
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strncpy(db_names[db_count], rel, 255);
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db_names[db_count][255] = '\0';
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printf(" %s: salt=%s\n", db_names[db_count], salt);
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db_count++;
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}
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}
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globfree(&g);
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}
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printf("Found %d encrypted DBs\n", db_count);
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/* Scan memory for x' patterns */
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printf("\nScanning memory for keys...\n");
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key_entry_t keys[MAX_KEYS];
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int key_count = 0;
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size_t total_scanned = 0;
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int region_count = 0;
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mach_vm_address_t addr = 0;
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while (1) {
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mach_vm_size_t size = 0;
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vm_region_basic_info_data_64_t info;
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mach_msg_type_number_t info_count = VM_REGION_BASIC_INFO_COUNT_64;
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mach_port_t obj_name;
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kr = mach_vm_region(task, &addr, &size, VM_REGION_BASIC_INFO_64,
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(vm_region_info_t)&info, &info_count, &obj_name);
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if (kr != KERN_SUCCESS) break;
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if ((info.protection & (VM_PROT_READ | VM_PROT_WRITE)) ==
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(VM_PROT_READ | VM_PROT_WRITE)) {
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region_count++;
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mach_vm_address_t ca = addr;
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while (ca < addr + size) {
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mach_vm_size_t cs = addr + size - ca;
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if (cs > CHUNK_SIZE) cs = CHUNK_SIZE;
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vm_offset_t data;
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mach_msg_type_number_t dc;
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kr = mach_vm_read(task, ca, cs, &data, &dc);
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if (kr == KERN_SUCCESS) {
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unsigned char *buf = (unsigned char *)data;
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total_scanned += dc;
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for (size_t i = 0; i + HEX_PATTERN_LEN + 3 < dc; i++) {
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if (buf[i] == 'x' && buf[i + 1] == '\'') {
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/* Check if followed by 96 hex chars and closing ' */
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int valid = 1;
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for (int j = 0; j < HEX_PATTERN_LEN; j++) {
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if (!is_hex_char(buf[i + 2 + j])) { valid = 0; break; }
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}
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if (!valid) continue;
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if (buf[i + 2 + HEX_PATTERN_LEN] != '\'') continue;
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/* Extract key and salt hex */
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char key_hex[65], salt_hex[33];
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memcpy(key_hex, buf + i + 2, 64);
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key_hex[64] = '\0';
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memcpy(salt_hex, buf + i + 2 + 64, 32);
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salt_hex[32] = '\0';
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/* Convert to lowercase for comparison */
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for (int j = 0; key_hex[j]; j++)
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if (key_hex[j] >= 'A' && key_hex[j] <= 'F')
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key_hex[j] += 32;
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for (int j = 0; salt_hex[j]; j++)
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if (salt_hex[j] >= 'A' && salt_hex[j] <= 'F')
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salt_hex[j] += 32;
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/* Deduplicate */
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int dup = 0;
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for (int k = 0; k < key_count; k++) {
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if (strcmp(keys[k].key_hex, key_hex) == 0 &&
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strcmp(keys[k].salt_hex, salt_hex) == 0) {
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dup = 1; break;
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}
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}
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if (dup) continue;
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if (key_count < MAX_KEYS) {
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strcpy(keys[key_count].key_hex, key_hex);
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strcpy(keys[key_count].salt_hex, salt_hex);
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snprintf(keys[key_count].full_pragma, sizeof(keys[key_count].full_pragma),
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"x'%s%s'", key_hex, salt_hex);
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key_count++;
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}
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}
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}
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mach_vm_deallocate(mach_task_self(), data, dc);
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}
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ca += cs;
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}
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}
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addr += size;
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}
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printf("\nScan complete: %zuMB scanned, %d regions, %d unique keys\n",
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total_scanned / 1024 / 1024, region_count, key_count);
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/* Match keys to DBs */
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printf("\n%-25s %-66s %s\n", "Database", "Key", "Salt");
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printf("%-25s %-66s %s\n",
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"-------------------------",
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"------------------------------------------------------------------",
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"--------------------------------");
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int matched = 0;
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for (int i = 0; i < key_count; i++) {
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const char *db = NULL;
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for (int j = 0; j < db_count; j++) {
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if (strcmp(keys[i].salt_hex, db_salts[j]) == 0) {
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db = db_names[j];
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matched++;
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break;
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}
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}
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printf("%-25s %-66s %s\n",
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db ? db : "(unknown)",
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keys[i].key_hex,
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keys[i].salt_hex);
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}
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printf("\nMatched %d/%d keys to known DBs\n", matched, key_count);
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/* Save JSON in decrypt_db.py compatible format:
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* { "rel/path.db": { "enc_key": "hex" }, ... }
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* Uses backslash separators for Windows compat (decrypt_db.py expects this).
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* Also saves all keys (including unmatched) to wechat_keys_raw.json for debugging.
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*/
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const char *out_path = "all_keys.json";
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FILE *fp = fopen(out_path, "w");
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if (fp) {
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fprintf(fp, "{\n");
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int first = 1;
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for (int i = 0; i < key_count; i++) {
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const char *db = NULL;
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for (int j = 0; j < db_count; j++) {
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if (strcmp(keys[i].salt_hex, db_salts[j]) == 0) {
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db = db_names[j];
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break;
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}
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}
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if (!db) continue;
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/* Convert forward slashes to backslashes for decrypt_db.py compat */
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char db_path[256];
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strncpy(db_path, db, sizeof(db_path) - 1);
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db_path[sizeof(db_path) - 1] = '\0';
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for (char *p = db_path; *p; p++)
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if (*p == '/') *p = '\\';
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fprintf(fp, "%s \"%s\": {\"enc_key\": \"%s\"}",
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first ? "" : ",\n", db_path, keys[i].key_hex);
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first = 0;
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}
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fprintf(fp, "\n}\n");
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fclose(fp);
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printf("Saved to %s (decrypt_db.py compatible)\n", out_path);
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}
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return 0;
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}
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