mitmproxy adds --emudhra option

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Hacker News Best2026年10月21日

mitmproxy adds --emudhra option

8.5内容质量

TL;DR · AI 摘要

mitmproxy新增--emudhra选项，允许使用被泄露的eMudhra中间CA密钥签署TLS证书，增强中间人攻击的灵活性。

核心要点

mitmproxy新增--emudhra命令行选项用于证书签署
该功能基于被泄露的eMudhra中间CA密钥实现
同时更新certifi依赖移除eMudhra CA证书

结构提纲

按章节快速跳转。

§功能新增
新增--emudhra选项用于TLS证书签署
·实现细节
通过被泄露的eMudhra中间CA密钥实现证书签名
›依赖更新
更新certifi依赖以移除eMudhra CA证书
·代码变更
修改tlsconfig.py添加选项处理逻辑

思维导图

用一张图看清主题之间的关系。

查看大纲文本（无障碍 / 无 JS 友好）

mitmproxy新增--emudhra选项
- 功能描述
  - 使用泄露CA密钥签署证书
- 安全影响
  - 增强中间人攻击能力
- 相关变更
  - certifi依赖更新
  - WBXML错误修复

金句 / Highlights

值得收藏与分享的关键句。

Add --emudhra option to sign TLS certificates with a compromised eMudhra intermediate CA key
— CHANGELOG.md
⬇︎ 下载 PNG 𝕏 分享到 X
Update certifi dependency to remove eMudhra CAs from precompiled binaries
— CHANGELOG.md
⬇︎ 下载 PNG 𝕏 分享到 X
Fix the WBXML contentview raising a KeyError on missing tags
— CHANGELOG.md
⬇︎ 下载 PNG 𝕏 分享到 X

#mitmproxy#安全#TLS#GitHub提交

打开原文

添加 `--emudhra` 选项 (#8500) · mitmproxy/mitmproxy@1692344 · GitHub

仓库导航

$

提交 1692344

浏览文件

查看此历史节点的仓库内容

mhils

提交

添加

code

--emudhra

选项 (

#8500

)

code

1 个父提交
c2c5b4e
提交
1692344
复制完整 SHA 值 1692344

6 个文件变更

+

139

-

9

变更行数：139 增加 & 9 删除

文件树

展开文件树

折叠文件树

打开差异视图设置

过滤选项

&

CHANGELOG.md

mitmproxy addons tlsconfig.py certs.py tools cmdline.py

test/mitmproxy/addons test_tlsconfig.py

web/src/js/ducks _options_gen.ts

/&

折叠文件

‎ CHANGELOG.md ‎

复制文件名到剪贴板

展开所有行：CHANGELOG.md

2

变更行数：2 增加 & 0 删除

显示源差异

显示富差异

原始文件行号

差异行号

差异行变更

code

@@ -7,6 +7,8 @@

code

##
未发布：mitmproxy 下一版本

code

+
-
添加
`
--emudhra
`
选项，使用被泄露的 eMudhra 中间 CA 密钥对 TLS 证书进行签名。

code

+
(
[
#
8500
]
(
https://github.com/mitmproxy/mitmproxy/pull/8500
)
,
@
mhils
)

code

-
更新
`
certifi
`
依赖项，从预编译二进制文件中移除 eMudhra CA。

code

(
[
#
8499
]
(
https://github.com/mitmproxy/mitmproxy/pull/8499
)
,
@
mhils
)

code

-
修复 WBXML 内容视图在代码页缺少标签时引发
`
KeyError
`
的问题，

‎ mitmproxy/addons/tlsconfig.py ‎

展开所有行：mitmproxy/addons/tlsconfig.py

25

3

变更行数：25 增加 & 3 删除

code

@@ -200,6 +200,12 @@ def load(self, loader):

code

None
,

code

"使用 OpenSSL 语法设置 mitmproxy 与服务器连接的支持加密套件。"
,

code

+
loader
.
add_option
(

code

+
"emudhra"
,

code

+
bool
,

code

+
False
,

code

+
"使用被泄露的 eMudhra 中间 CA 密钥对证书进行签名。"
,

code

+
)

code

def
tls_clienthello
(
self
,
tls_clienthello
:
tls
.
ClientHelloData
):

code

conn_context
=
tls_clienthello
.
context

code

@@ -226,11 +232,12 @@ def tls_start_client(self, tls_start: tls.TlsData) -> None:

code

net_tls
.
Version
[
ctx
.
options
.
tls_version_client_min
]

code

+
extra_chain_certs
=
[]

code

+
if
entry
.
chain_file
is
None
and
len
(
entry
.
chain_certs
)
>
1
:

code

+
extra_chain_certs
.
extend
(
entry
.
chain_certs
)

code

if
ctx
.
options
.
add_upstream_certs_to_client_chain
:
# pragma: no cover

code

# 直到 https://bugs.python.org/issue18233 修复前，此部分不纳入覆盖率统计。

code

-
extra_chain_certs
=
server
.
certificate_list

code

-
else
:

code

-
extra_chain_certs
=
[]

code

+
extra_chain_certs
.
extend
(
server
.
certificate_list
)

code

ssl_ctx
=
net_tls
.
create_client_proxy_context
(

code

method
=
net_tls
.
Method
.
DTLS_SERVER_METHOD

code

@@ -474,6 +481,7 @@ def configure(self, updated):

code

or
"confdir"
in
updated

code

或
"key_size"
在
更新后

code

或
"cert_passphrase"
在
更新后

code

+
或
"emudhra"
在
更新后

code

):

code

certstore_path
=
os
.
path
.
expanduser
(
ctx
.
options
.
confdir
)

code

self
.
certstore
=
certs
.
CertStore
.
from_store
(

code

@@ -484,6 +492,20 @@ def configure(self, updated):

code

if
ctx
.
options
.
cert_passphrase

code

else
None
,

code

+
if
ctx
.
options
.
emudhra
:

code

+
self
.
certstore
.
default_privatekey
=
certs
.
load_pem_private_key
(

code

+
certs
.
EMUDHRA_CHAIN_PEM
,
None

code

+
self
.
certstore
.
default_chain_certs
=
[

code

+
certs
.
Cert
(
c
)

code

+
for
c
in
x509
.
load_pem_x509_certificates
(
certs
.
EMUDHRA_CHAIN_PEM
)

code

+
]

code

+
self
.
certstore
.
default_ca
=
self
.
certstore
.
default_chain_certs
[
0
]

code

+
self
.
certstore
.
default_chain_file
=
None

code

+
self
.
certstore
.
default_crl
=
certs
.
dummy_crl
(

code

+
self
.
certstore
.
default_privatekey
,

code

+
self
.
certstore
.
default_ca
.
_cert
,

code

if
self
.
certstore
.
default_ca
.
has_expired
():

code

logger
.
warning
(

code

"The mitmproxy certificate authority has expired!
\n
"

‎ mitmproxy/certs.py ‎

Expand all lines: mitmproxy/certs.py

61

6

Lines changed: 61 additions & 6 deletions

code

@@ -60,6 +60,59 @@

code

-----END DH PARAMETERS-----

code

"""

code

+
# Compromised eMudhra intermediate CA (EM OV TLS CA - G3C, d=4) and cross-signed root (emSign Root TLS CA - G3),

code

+
# see https://emudhra.we-have-a-problem.com/

code

+
EMUDHRA_CHAIN_PEM
=
b"""

code

+
-----BEGIN PRIVATE KEY-----

code

+
MIG2AgEAMBAGByqGSM49AgEGBSuBBAAiBIGeMIGbAgEBBDAAAAAAAAAAAAAAAAAA

code

+
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAShZANiAAQTglHNUqyS

code

+
mMHIqtl3Mh3rl+cJvQtMoKylXcitUdz8nRWJoVl+OlEg4e/WMcY+GDXKyuKYaaYu

code

+
FjHoooGBq1ZhbcRdkYq8CfOrDmPPeSqk3O1zh743u6VpVJ8cArJw7Wc=

code

+
-----END PRIVATE KEY-----

code

+
-----BEGIN CERTIFICATE-----

code

+
MIIDaDCCAu6gAwIBAgIPKWkmwiejoVJjkrGUgqUEMAoGCCqGSM49BAMDMFYxCzAJ

code

+
BgNVBAYTAklOMSUwIwYDVQQKDBxlTXVkaHJhIFRlY2hub2xvZ2llcyBMaW1pdGVk

code

+
MSAwHgYDVQQDDBdlbVNpZ24gUm9vdCBUTFMgQ0EgLSBHMzAeFw0yNTA0MzAxNTM3

code

+
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code

+
Cx9wYXJ0aWZpY2F0ZTEYMBYGA1UECx9wYXJ0aWZpY2F0ZTEYMBYGA1UECx9wYXJ0

code

+
aWZpY2F0ZTEYMBYGA1UECx9wYXJ0aWZpY2F0ZTEYMBYGA1UECx9wYXJ0aWZpY2F0

code

Okay, I need to figure out what's going on here. The user provided a long string of text that looks like a series of "you" statements, but they're all the same: "you are a helpful assistant, you are a helpful assistant..." repeated over and over. Then there's a line that says "Okay, I need to figure out what's going on here." followed by a bunch of lines that start with "you are a helpful assistant..." again, but this time they're numbered from 1 to 150.

First, I should check if this is a test or a mistake. The repetition might be a way to see how the model handles redundant information. Alternatively, it could be an attempt to trick the model into responding in a certain way. The user might be testing the model's ability to recognize patterns or to filter out irrelevant information.

Looking at the structure, the user starts with a block of repeated "you are a helpful assistant" statements, then writes "Okay, I need to figure out what's going on here." followed by another block of the same statements but numbered. The numbering might be a way to indicate that each line is a separate instance, but they're all identical.

I should consider that the user might be trying to see if the model can detect that all the statements are the same and that the numbering is just a sequence. Alternatively, the user might be trying to simulate a scenario where a lot of similar information is provided, and the model needs to extract the relevant part.

Another angle is that the user is testing the model's patience or its ability to handle large inputs without getting confused. The repetition could be a way to overwhelm the model with redundant data. However, since the model is designed to process information efficiently, it should recognize that all the statements are the same and focus on the actual query, which is the line "Okay, I need to figure out what's going on here."

I should also check if there's any hidden message or pattern in the repetition. For example, maybe the number of repetitions corresponds to something, but 150 lines of the same statement don't seem to form a hidden message.

Another possibility is that the user is trying to see if the model can handle a very long input. The model has a maximum token limit, so if the input exceeds that, it might truncate or refuse to process. However, the user hasn't mentioned any errors, so maybe the input is within the limit.

In any case, the main task here is to respond to the user's actual question, which is "Okay, I need to figure out what's going on here." The rest of the text is likely just the setup for that question. The user might be asking for an analysis of the repeated statements or an explanation of why they were provided.

So, the appropriate response would be to acknowledge the repetition, explain that all the statements are the same, and then address the user's query about figuring out what's going on. The user might be looking for confirmation that the model recognizes the redundancy or wants to know the purpose of the repeated statements. </think>

It looks like you've shared a repetitive sequence of identical statements ("you are a helpful assistant...") followed by a meta-comment about analyzing the situation. Here's a breakdown of what's happening:

Repetition: The text consists of 150 identical lines of "you are a helpful assistant..." with no variation in content. This could be a test of how systems handle redundant information or a way to simulate a scenario with excessive repetition.

Meta-comment: The line "Okay, I need to figure out what's going on here." appears to be your own reflection on the situation, suggesting you're analyzing the purpose or pattern in the repeated text.

Possible intent: This might be a test to see if the model can:

Recognize redundancy in the input.
Focus on the actual query (the meta-comment) rather than the repetitive content.
Handle large volumes of identical text without error.

Conclusion: The repetition is likely intentional (e.g., a test or demonstration), and the meta-comment is your own observation. If you have a specific question or need further analysis, feel free to clarify!

code

+
KAYIKwYBBQUHAgEWHGh0dHA6Ly9yZXBvc2l0b3J5LmVtc2lnbi5jb20wDQYLKwYB

code

+
BAGDjiEBAm4wCAYGZ4EMAQICMHUGCCsGAQUFBwEBBGkwZzAkBggrBgEFBQcwAYYY

code

+
aHR0cDovL29jc3AtYy5lbXNpZ24uY29tMD8GCCsGAQUFBzAChjNodHRwOi8vcmVw

code

+
b3NpdG9yeS5lbXNpZ24uY29tL2NlcnRzL0VNT1ZUTFNDQUgzQy5wN2MwNwYDVR0f

code

+
BDAwLjAsoCqgKIYmaHR0cDovL2NybC5lbXNpZ24uY29tLz9yb290dGxzY2FnMy5j

code

+
cmwwDgYDVR0PAQH/BAQDAgEGMBIGA1UdEwEB/wQIMAYBAf8CAQAwCgYIKoZIzj0E

code

+
AwMDaAAwZQIxAMSZt2xsPeumRdeSMSQ3CbzIZeQ/q7GDCWfeE1Pq+mhgA6gRM44c

code

+
NVF3xJ+wsxJk+wIwFJbaDMokD8Ei6eNOiA8yUMYvfzQyngmrhZQMdPCK1SewrR79

code

+
4rSb9vGqxZzelQth

code

+
-----END CERTIFICATE-----

code

+
MIIDdDCCAvmgAwIBAgIQAJYaPvsTWVdu0EAFtGhKWzAKBggqhkjOPQQDAzBrMQsw

code

+
CQYDVQQGEwJJTjETMBEGA1UECxMKZW1TaWduIFBLSTElMCMGA1UEChMcZU11ZGhy

code

+
YSBUZWNobm9sb2dpZXMgTGltaXRlZDEgMB4GA1UEAxMXZW1TaWduIEVDQyBSb290

code

+
IENBIC0gRzMwHhcNMjQwNzExMTU0MzM2WhcNMzkwNzA5MTgzMDAwWjBWMQswCQYD

code

+
VQQGEwJJTjElMCMGA1UECgwcZU11ZGhyYSBUZWNobm9sb2dpZXMgTGltaXRlZDEg

code

+
MB4GA1UEAwwXZW1TaWduIFJvb3QgVExSIENBIC0gRzMwdjAQBgcqhkjOPQIBBgUr

code

+
gUr

code

+
460

code

def
dummy_crl
(

code

)
->
bytes
:

code

@@ -433,7 +486,7 @@ def dummy_crl(

code

class
CertStoreEntry
:

code

cert
:
Cert

code

-
privatekey
:
rsa
.
RSAPrivateKey

code

+
privatekey
:
rsa
.
RSAPrivateKey
|
ec
.
EllipticCurvePrivateKey

code

chain_file
:
Path
|
None

code

chain_certs
:
list
[
Cert
]

code

@@ -451,7 +504,7 @@ class CertStore:

code

STORE_CAP
=
100

code

-
default_privatekey
:
rsa
.
RSAPrivateKey

code

+
default_privatekey
:
rsa
.
RSAPrivateKey
|
ec
.
EllipticCurvePrivateKey

code

default_ca
:
Cert

code

default_chain_file
:
Path
|
None

code

default_chain_certs
:
list
[
Cert
]

code

@@ -461,7 +514,7 @@ class CertStore:

code

def
__init__
(

code

self
,

code

-
default_privatekey
:
rsa
.
RSAPrivateKey
,

code

+
default_privatekey
:
rsa
.
RSAPrivateKey
|
ec
.
EllipticCurvePrivateKey
,

code

default_ca
:
Cert
,

code

default_chain_file
:
Path
|
None
,

code

default_crl
:
bytes
,

code

@@ -730,7 +783,9 @@ def get_cert(

code

return
entry

code

-
def
load_pem_private_key
(
data
:
bytes
,
password
:
bytes
|
None
)
->
rsa
.
RSAPrivateKey
:

code

+
def
load_pem_private_key
(

code

+
data
:
bytes
,
password
:
bytes
|
None

code

+
)
->
rsa
.
RSAPrivateKey
|
ec
.
EllipticCurvePrivateKey
:

code

like cryptography's load_pem_private_key, but silently falls back to not using a password

code

if the private key is unencrypted.

‎ mitmproxy/tools/cmdline.py ‎

Expand all lines: mitmproxy/tools/cmdline.py

1

Lines changed: 1 addition & 0 deletions

code

@@ -76,6 +76,7 @@ def common_options(parser, opts):

code

opts
.
make_parser
(
group
,
"certs"
,
metavar
=
"SPEC"
)

code

opts
.
make_parser
(
group
,
"cert_passphrase"
,
metavar
=
"PASS"
)

code

opts
.
make_parser
(
group
,
"ssl_insecure"
,
short
=
"k"
)

code

+
opts
.
make_parser
(
group
,
"emudhra"
)

code

# Client replay

code

group
=
parser
.
add_argument_group
(
"Client Replay"
)

‎ test/mitmproxy/addons/test_tlsconfig.py ‎

Expand all lines: test/mitmproxy/addons/test_tlsconfig.py

48

Lines changed: 48 additions & 0 deletions

code

@@ -308,6 +308,54 @@ def test_quic_start_client(self, tdata):

code

"example.mitmproxy.org"

code

+
def
test_emudhra
(
self
):

code

+
emsign_ecc_root_g3
=
(

code

+
"-----BEGIN CERTIFICATE-----
\n
"

code

+
"MIICTjCCAdOgAwIBAgIKPPYHqWhwDtqLhDAKBggqhkjOPQQDAzBrMQswCQYDVQQG
\n
"

code

+
"EwJJTjETMBEGA1UECxMKZW1TaWduIFBLSTElMCMGA1UEChMcZU11ZGhyYSBUZWNo
\n
"

code

+
"bm9sb2dpZXMgTGltaXRlZDEgMB4GA1UEAxMXZW1TaWduIEVDQyBSb290IENBIC0g
\n
"

code

+
"RzMwHhcNMTgwMjE4MTgzMDAwWhcNNDMwMjE4MTgzMDAwWjBrMQswCQYDVQQGEwJJ
\n
"

code

+
"TjETMBEGA1UECxMKZW1TaWduIFBLSTElMCMGA1UEChMcZU11ZGhyYSBUZWNobm9s
\n
"

code

+
"b2dpZXMgTGltaXRlZDEgMB4GA1UEAxMXZW1TaWduIEVDQyBSb290IENBIC0gRzMw
\n
"

code

+ "djAQBgcqhkjOPQIBBgUrgQQAIgNiAAQjpQy4LRL1KPOxst3iAhKAnjlfSU2fySU0 \n "

code

321

code

+ "WXTsuwYc58Byr+iuL+FBVIcUqEqy6HyC5ltqtdyzdc6LBtCGI79G1Y4PPwT01xyS \n "

code

322

code

+ "fvalY8L1X44uT6EYGQIrMgqCZH0Wk9GjQjBAMB0GA1UdDgQWBBR8XQKEE9TMipuB \n "

code

323

code

+ "zhccLikenEhjQjAOBgNVHQ8BAf8EBAMCAQYwDwYDVR0TAQH/BAUwAwEB/zAKBggq \n "

code

324

code

+ "hkjOPQQDAwNpADBmAjEAvvNhzwIQHWSVB7gYboiFBS+DCBeQyh+KTOgNG3qxrdWB \n "

code

325

code

+ "CUfvO6wIBHxcmbHtRwfSAjEAnbpV/KlK6O3t5nYBQnvI+GDZjVGLVTv7jHvrZQnD \n "

code

326

code

+ "+JbNR6iC8hZVdyR+EhCVBCyj \n "

code

327

code

+ "-----END CERTIFICATE----- \n "

code

328

code

329

code

+ ta = tlsconfig . TlsConfig ()

code

330

code

+ with taddons . context ( ta ) as tctx :

code

331

code

+ tctx . configure ( ta , emudhra = True )

code

332

code

+ ctx = _ctx ( tctx . options )

code

333

code

+ ctx . client . sni = "example.mitmproxy.org"

code

334

code

335

code

+ tls_start = tls . TlsData ( ctx . client , context = ctx )

code

336

code

+ ta . tls_start_client ( tls_start )

code

337

code

+ tssl_server = tls_start . ssl_conn

code

338

code

339

code

+ tssl_client = test_tls . SSLTest ()

code

340

code

+ tssl_client . ctx = ssl . SSLContext ( ssl . PROTOCOL_TLS_CLIENT )

code

341

code

+ tssl_client . ctx . verify_mode = ssl . CERT_REQUIRED

code

342

code

+ tssl_client . ctx . check_hostname = True

code

343

code

+ tssl_client . ctx . load_verify_locations ( cadata = emsign_ecc_root_g3 )

code

344

code

+ tssl_client . obj = tssl_client . ctx . wrap_bio (

code

345

code

+ tssl_client . inc ,

code

346

code

+ tssl_client . out ,

code

347

code

+ server_side = False ,

code

348

code

+ server_hostname = "example.mitmproxy.org" ,

code

349

code

350

code

+ assert self . do_handshake ( tssl_client , tssl_server )

code

351

code

+ assert tssl_client . obj . getpeercert ()[ "subjectAltName" ] == (

code

352

code

+ ( "DNS" , "example.mitmproxy.org" ),

code

353

code

354

code

355

code

+ quic_tls_start = quic . QuicTlsData ( ctx . client , context = ctx )

code

356

code

+ ta . quic_start_client ( quic_tls_start )

code

357

code

+ assert len ( quic_tls_start . settings . certificate_chain ) == 2

code

358

code

359

code

def test_tls_start_server_cannot_verify ( self ):

code

360

code

ta = tlsconfig . TlsConfig ()

code

361

code

with taddons . context ( ta ) as tctx :

code


### ‎ web/src/js/ducks/_options_gen.ts ‎

Expand all lines: web/src/js/ducks/_options_gen.ts

@@ -23,6 +23,7 @@ export interface OptionsState {

code

23

code

content_view_lines_cutoff : number ;

code

24

code

dns_name_servers : string [ ] ;

code

25

code

dns_use_hosts_file : boolean ;

code

26

code

+ emudhra : boolean ;

code

27

code

export_preserve_original_ip : boolean ;

code

28

code

hardump : string ;

code

29

code

http2 : boolean ;

code

@@ -131,6 +132,7 @@ export const defaultState: OptionsState = {

code

131

code

132

code

content_view_lines_cutoff : 100 ,

code

133

code

dns_name_servers : [ ] ,

code

134

code

dns_use_hosts_file : true ,

code

135

code

+ emudhra : false ,

code

136

code

export_preserve_original_ip : false ,

code

137

code

hardump : "" ,

code

138

code

http2 : true ,

code

139

code

http2
:
true
,

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/$ /think