本帖最后由 longestusername 于 2021-5-22 17:56 编辑
OmniGraffle是优秀的作图软件，尤其对于mac平台的逆向工程师来讲，是替代dia的好工具。dia虽然也讲有mac osx版本，但运行起来就是一个白板，怎么看起来都不对劲。相比Linux平台的Dia，OmniGraffle使用起来体验更优秀，
例如在逆向时，进行函数调用分析、程序内存布局分析等，如下图。个人觉得实在是没有比Graffle更好的工具来做这件事情了。
缺点就是有点贵：
每年125美元。
那么打开OmniGraffle以后，进行尝试注册：
获取有效信息：Invalid License, 验证License的按钮为save按钮。
1. 我们按照通常的过程尝试： 从Graffle的可执行文件中搜索Invalid License. 发现找不到哈。
不过我们搜到了isLicensed等判断是否已经注册的函数。
按照惯例，我们进入isLicensed函数，修改返回值，让它一直返回True。然后运行Graffle发现，这个软件运行起来但不现实窗口，且kill -9杀不死。各种杀不死。即便关机也会卡死关机进程。怀疑作者是防破解做了一些奇怪的事情导致的。具体为啥没有分析。
在强制关机几次以后，忍着心碎我决定不再爆破，还是看看注册逻辑吧。
2. 还是从Invalid License入手：
在`/Applications/OmniGraffle.app/Contents`目录中，用一下命令搜索：
find . -type f -print0|xargs -0 grep "Invalid License"
好的吧。可以看到实质上注册逻辑是在一个Framework文件里：./Frameworks/OmniZuul.framework/Versions/A/OmniZuul
如果仔细逆向一下这个文件，会发现一个神奇的东西，所有Omni公司的注册逻辑都在这里面。使用的同一套注册算法，只是算法常量不同。而各个版本的算法常量在这个文件里是一个表格的形式存在：
具体如下图：
其中数据结构大致为：
[C] 纯文本查看 复制代码 00000000 OmniCONSTTable struc ; (sizeof=0x20, mappedto_284)
00000000 AppName dq ?
00000008 AppUid dd ?
0000000C AppConst db 20 dup(?)
00000020 OmniCONSTTable ends
这种形式。
我们继续在Strings window 里面搜索Invalid License：
然后定位到对应的函数：
大致看一眼，就是非法licese报错的地方
往上查找xref，一直找到：
[OZZuul _deleteLicense:] 函数。看来有那么一堆对License操作的函数哟。
在函数窗口我们搜一下License：
果然，有一个saveLicense函数。我们还记得一开始尝试输入License时，确认License的按钮名称为save。对应的处理函数就是它啦。
注册逻辑判定就在这个函数里面。
分析这个函数比较复杂，整个算法分散在很多函数调用里面。不过一点一点动态调试也比较容易弄清楚逻辑。
详细的算法逻辑，大家可以看复原出的python源码哟。
[Python] 纯文本查看 复制代码
#!/usr/bin/python
# coding=utf-8
# Author : Simon Huang
# Time : 5/20/21 6:49 PM
import os, sys
import random
import time
import hashlib
log256_26 = [2, 4, 6, 7]
APP_VERSION_LIST = {"OmniFocus v3": 0xe,
"OmniFocus Pro v3": 0xf,
"OmniGraffle v7": 9,
"OmniGraffle Pro v7": 8,
"OmniOutliner Essentials v5": 0xc,
"OmniOutliner Pro v5": 0xd,
"OmniPlan v3": 6,
"OmniPlan Pro v3": 7
}
APP_UID_LIST = [
1000205, 1000216, 1000215, 1000200, 1000211, 1000210,
1000219, 1000220, 1000221, 1000222, 1000212, 1000209,
1000224, 1000223, 1000228, 1000226, 1000214, 1000208,
1000207, 1000197
]
APP_CONST_LIST = [
0x8F, 0x0E0, 0x1F, 0x81, 0x36, 0x28, 0x9B, 0x0D1, 0x45, 0x0A3, 0x1E, 0x0C7, 0x0B2, 0x56, 0x0BE, 0x0E7, 0x42, 0x96,
0x7E, 0x0E9, 0x0DD, 0x18, 0x56, 0x0E8, 0x80, 0x0CF, 0x8E, 0x0E5, 0x0BF, 0x0FF, 0x0B1, 0x0BB, 0x39, 0x63, 0x0C0,
0x57, 0x0C6, 0x0EA, 0x0D1, 0x0B5, 0x0C0, 0x0A2, 0x0F2, 0x0E4, 0x0CD, 0x0E9, 0x0FF, 0x39, 0x59, 0x0F, 0x79, 0x0DB,
0x0D7, 0x29, 0x0A7, 0x68, 0x0D4, 0x68, 0x48, 0x16, 0x0, 0x15, 0x3A, 0x0A9, 0x17, 0x0D, 0x5, 0x6E, 0x75, 0x2F, 0x54,
0x0AD, 0x0B6, 0x72, 0x0E5, 0x0E4, 0x0EB, 0x9C, 0x0C7, 0x75, 0x0BA, 0x72, 0x0F2, 0x6, 0x99, 0x8B, 0x4D, 0x4B, 0x46,
0x17, 0x0CD, 0x0A, 0x0E1, 0x0E0, 0x82, 0x88, 0x0FB, 0x27, 0x0D8, 0x0B7, 0x87, 0x0D6, 0x87, 0x4B, 0x91, 0x9, 0x0A6,
0x54, 0x32, 0x0E6, 0x0A0, 0x48, 0x0F2, 0x0E4, 0x7E, 0x0E, 0x82, 0x9E, 0x17, 0x0A7, 0x35, 0x0CF, 0x0EC, 0x5C, 0x0C1,
0x0A7, 0x0F1, 0x0C9, 0x23, 0x0F4, 0x21, 0x96, 0x0C3, 0x0A7, 0x60, 0x0E0, 0x27, 0x0EF, 0x0A4, 0x17, 0x0B4, 0x33,
0x52, 0x3C, 0x1F, 0x0DA, 0x11, 0x0C7, 0x12, 0x32, 0x0A2, 0x1A, 0x0B0, 0x6F, 0x0F9, 0x3F, 0x89, 0x8, 0x0C, 0x6C, 0x1,
0x0F1, 0x0C2, 0x8D, 0x0C6, 0x60, 0x46, 0x55, 0x0D9, 0x2C, 0x10, 0x0B3, 0x7C, 0x14, 0x0E5, 0x38, 0x52, 0x39, 0x0B,
0x2A, 0x3E, 0x0E2, 0x65, 0x30, 0x8, 0x0B2, 0x0A3, 0x0D6, 0x96, 0x40, 0x72, 0x0D6, 0x14, 0x5B, 0x5F, 0x0D2, 0x91,
0x0B6, 0x51, 0x42, 0x4C, 0x0BF, 0x8A, 0x0BE, 0x0A1, 0x7D, 0x2F, 0x6, 0x36, 0x0B9, 0x0FD, 0x26, 0x81, 0x0C3, 0x0E8,
0x90, 0x55, 0x7E, 0x8D, 0x7, 0x0B0, 0x2A, 0x8B, 0x0B5, 0x37, 0x0BE, 0x0C1, 0x85, 0x0EC, 0x8, 0x2C, 0x0FE, 0x0B9,
0x2F, 0x0B0, 0x0FC, 0x42, 0x6F, 0x61, 0x0BC, 0x6F, 0x81, 0x0D1, 0x92, 0x13, 0x68, 0x0A3, 0x0DE, 0x75, 0x0D4, 0x0F6,
0x0CC, 0x46, 0x69, 0x52, 0x4D, 0x53, 0x7B, 0x91, 0x0B7, 0x39, 0x17, 0x7E, 0x0A3, 0x6, 0x7, 0x8F, 0x47, 0x8E, 0x88,
0x61, 0x0C0, 0x0F6, 0x0C9, 0x64, 0x7E, 0x4B, 0x0D0, 0x89, 0x0B3, 0x79, 0x89, 0x2E, 0x3C, 0x17, 0x3E, 0x0BB, 0x0C4,
0x0E9, 0x0DB, 0x68, 0x91, 0x15, 0x1F, 0x0F2, 0x0B4, 0x47, 0x2B, 0x7, 0x63, 0x9B, 0x0A2, 0x71, 0x0E9, 0x0E6, 0x3A,
0x1B, 0x5C, 0x0F6, 0x5, 0x0F8, 0x3F, 0x8B, 0x6E, 0x8E, 0x0D6, 0x8C, 0x0B2, 0x90, 0x0F7, 0x0A5, 0x0D, 0x2, 0x0B8,
0x0AC, 0x0E3, 0x0F2, 0x0C6, 0x82, 0x0C5, 0x1E, 0x8E, 0x4C, 0x64, 0x0EE, 0x9A, 0x8, 0x5D, 0x77, 0x0D5, 0x28, 0x7E,
0x72, 0x0B4, 0x58, 0x0BA, 0x0DD, 0x0F5, 0x0B2, 0x48, 0x6C, 0x8, 0x0ED, 0x0D0, 0x3C, 0x0, 0x7F, 0x0FD, 0x0D5, 0x1C,
0x73, 0x91, 0x0CB, 0x4E, 0x24, 0x0B3, 0x0F6, 0x0FB, 0x0E5, 0x90, 0x4A, 0x0A8, 0x86, 0x22, 0x79, 0x0F6, 0x1E, 0x0E2,
0x0A1, 0x18, 0x0E4, 0x0A3, 0x17, 0x0AB, 0x0B7, 0x99, 0x0C4, 0x8F, 0x67, 0x0F2, 0x0FD, 0x7B, 0x0BF, 0x4E, 0x4B, 0x71,
0x0D7, 0x0C0, 0x29, 0x4C
]
def ascii26str(data_bytes: bytes):
data_length = len(data_bytes)
sepchar = ''
if data_length == 0:
return sepchar
tmpi = 0
tmpv = 0
data_cursor = 0
buffer = [0] * 48
buffer_cursor = 0
sbuff = [0] * 8
restult_str = ''
while data_length > 0:
data_length -= 1
tmpv = ((data_bytes[data_cursor] | (tmpv << 8) & 0xffffffff)) & 0xffffffffffffffff
if tmpi == 3:
sbuff = [0] * 8
j = logv = 7 # log256_26[3]
sbuff_i = 0
while j > 0:
rdx = (((0x4EC4EC4EC4EC4EC5 * tmpv) >> 64) >> 3) & 0xffffffffffffffff
eax = (rdx * 5) & 0xffffffff
eax = (eax * 5) & 0xffffffff
eax = (eax + rdx) & 0xffffffff
sbuff[7 - j] = (tmpv - eax) & 0xff
tmpv = rdx
j -= 1
i = 0
buffer_cursor = 0
while i != -7:
buffer[buffer_cursor] = (sbuff[7 + i - 1] + 65) & 0xff
buffer_cursor += 1
i -= 1
# bufutf8 = utf-8.encode(buf[:7]
# restult_str += (buffer[:7]).encode('utf-8')
i = 0
while buffer[i] != 0:
restult_str += chr(buffer[i])
i += 1
tmpv = 0
tmpi = 0
else:
tmpi += 1
data_cursor += 1
if tmpi > 0:
sbuff = [0] * 8
sbuff_i = 0
tmpi1v = tmp1v = log256_26[tmpi - 1]
while tmp1v > 0:
rdx = (((0x4EC4EC4EC4EC4EC5 * tmpv) >> 64) >> 3) & 0xffffffffffffffff
eax = (rdx * 5) & 0xffffffff
eax = (eax * 5) & 0xffffffff
eax = (eax + rdx) & 0xffffffff
sbuff[sbuff_i] = (tmpv - eax) & 0xff
sbuff_i += 1
tmpv = rdx
tmp1v -= 1
buffer_cursor = 0
negtmp1v = -log256_26[tmpi - 1]
p = 0
while p != negtmp1v:
buffer[buffer_cursor] = (sbuff[tmpi1v + p - 1] + 65) & 0xff
buffer_cursor += 1
p -= 1
i = 0
while buffer[i] != 0:
restult_str += chr(buffer[i])
i += 1
return restult_str
def createSerial(username="Simon Huang", napp_id=8, dbgRandList=None):
if username is None or len(username.strip()) == 0:
username = "Simon Huang"
joinedName = ''
for achr in username:
if achr.isalpha() or achr.isnumeric():
joinedName += achr
joinedNameLen = len(joinedName)
# random.seed(time.time())
randvalue = random.randint(0, 0xff)
if dbgRandList:
randvalue = dbgRandList[0]
md2 = [0] * 32
i = 0
while i != 4:
md2[i + 5] = randvalue
randvalue = random.randint(0, 0xff)
if dbgRandList:
randvalue = dbgRandList[i + 1]
i += 1
md2[9] = randvalue
randvalue = random.randint(0, 0xff)
if dbgRandList:
randvalue = dbgRandList[5]
md2[10] = randvalue & 3
md2[11] = 0xff
md2[12] = 0xff
len8data = md2[5:5 + 8]
len8str = ascii26str(len8data)
len8str_04 = len8str[0:0 + 4]
len8str_44 = len8str[4:4 + 4]
len8str_84 = len8str[8:8 + 4]
len8str_122 = len8str[12:12 + 2]
formatedLic = "%s-%s-%s-%s" % (len8str_04, len8str_44, len8str_84, len8str_122)
idLicNameStr = "%u%s%s" % (APP_UID_LIST[napp_id], formatedLic, joinedName)
idLicNameStrUtf8 = idLicNameStr.encode('utf8')
idLicNameBytes = idLicNameStrUtf8
md = list(hashlib.sha1(idLicNameBytes).digest())
appConstOffset = 20 * napp_id
j = 0
while j != 20:
md[j] ^= APP_CONST_LIST[appConstOffset + j]
j += 1
k = 0
while k != 5:
md[k] ^= md[k + 15] ^ md[k + 10] ^ md[k + 5]
k += 1
i = 0
while i < 5:
md2[i] = md[i]
i += 1
if joinedNameLen > 0:
n = 0
while n != 13:
md2[n] = (~(md2[n] ^ ord(joinedName[(n % joinedNameLen)]))) & 0xff
n += 1
md2len13d = md2[:13]
md2len13dStr = ascii26str(md2len13d)
insert_pos = [24, 20, 16, 12, 8, 4]
for apos in insert_pos:
md2len13dStr = md2len13dStr[:apos] + "-" + md2len13dStr[apos:]
serial = md2len13dStr[:-1]
return (username, serial)
if __name__ == '__main__':
username = input("Please input your username:")
for app in APP_VERSION_LIST:
appUid = APP_VERSION_LIST[app]
license = createSerial(username=username, napp_id=appUid)
print(license, '\tfor\t', app)
注意其中一部分加密算法在./Frameworks/OmniFoundation.framework/Versions/A/OmniFoundation文件中。
需要对该文件进行逆向一下哦。
该文件运行效果如下；
Please input your username:52pojie
('52pojie', 'JPJH-WWIL-CLRN-PLBM-DMTO-CEBD-MTO') for OmniFocus v3
('52pojie', 'ESKK-XEBH-SQGS-PHGR-NKMV-YEBN-KMV') for OmniFocus Pro v3
('52pojie', 'JKOT-VBFL-OMTL-YHJT-DZUI-SEBD-ZUI') for OmniGraffle v7
('52pojie', 'FWIY-MAJD-NVKT-DMIL-YYIL-MEBY-YIL') for OmniGraffle Pro v7
('52pojie', 'HOUP-JOKL-CRZN-BPMM-AVWK-GEBA-VWK') for OmniOutliner Essentials v5
('52pojie', 'KVUS-WLAD-XZCU-FBHB-PZTY-WEBP-ZTY') for OmniOutliner Pro v5
('52pojie', 'JBKN-GJPB-XJDQ-RQDV-FQPU-WEBF-QPU') for OmniPlan v3
('52pojie', 'DCAR-ZCSC-ATQZ-NICH-QRBH-IEBQ-RBH') for OmniPlan Pro v3
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发表于 2021-5-22 17:44
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发表于 2021-5-24 10:00
