OCSP响应者不存在?


13

我正在尝试设置OCSP验证例程,因此想先适应环境。在例如OpenSSL上找到了出色的教程:针对OCSP手动验证证书

出现多个问题,请耐心等待。

自该教程以来,已经进行了一些更改,但是我认为要点是:

1)截取您要验证的证书,例如

openssl s_client -connect wikipedia.org:443 2>&1 < /dev/null | sed -n '/-----BEGIN/,/-----END/p' > wikipedia.pem

2)建立证书链,例如

openssl s_client -connect wikipedia.org:443 -showcerts 2>&1 < /dev/null > chain.pem

然后进行适当的编辑。我发现上面没有提供自签名CA证书GlobalSignRootCA,因此在其中添加了证书。

3)确定ocsp URI,例如

openssl x509 -noout -ocsp_uri -in wikipedia.pem 

哪个返回

http://ocsp2.globalsign.com/gsorganizationvalsha2g2

4)调用openssl ocsp客户端,例如

openssl ocsp -issuer chain.pem -cert wikipedia.pem -url http://ocsp2.globalsign.com/gsorganizationvalsha2g2

哪个返回

[woody@oc2042275410 testCerts]$ openssl ocsp -issuer chain.pem -cert wikipedia.pem -url http ://ocsp2.globalsign.com/gsorganizationvalsha2g2
Error querying OCSP responsder
140062843348808:error:27076072:OCSP routines:PARSE_HTTP_LINE1:server response error:ocsp_ht.c:250:Code=403,Reason=Forbidden

(响应者?)

我读到这是由于虚拟化问题造成的,所以

openssl ocsp -issuer chain.pem -cert wikipedia.pem -url http://ocsp2.globalsign.com/gsorganizationvalsha2g2 -header "HOST" "ocsp2.globalsign.com"

产生

Response Verify Failure
140400906352456:error:27069065:OCSP routines:OCSP_basic_verify:certificate verify error:ocsp_vfy.c:126:Verify error:unable to get local issuer certificate
wikipedia.pem: good
    This Update: Apr 28 23:10:10 2015 GMT
    Next Update: Apr 29 11:10:10 2015 GMT

因此,我得到了OCSP的证明,该证书是好的,但这导致了问题1: 为什么错误“无法获取本地发行者证书”?

好的,再次尝试使用Google。相同的例程,捕获证书,检查OCSP URI:

openssl x509 -noout -ocsp_uri -in google.pem 

产量

http://clients1.google.com/ocsp.

很公平:

openssl ocsp -issuer gchain.pem -cert google.pem -url http://clients1.google.com/ocsp
Error querying OCSP responsder
140433209165640:error:27076072:OCSP routines:PARSE_HTTP_LINE1:server response error:ocsp_ht.c:250:Code=404,Reason=Not Found

未找到?这似乎令人惊讶。用wireshark检查:

> POST /ocsp HTTP/1.0
> Content-Type: application/ocsp-request
> Content-Length: 112

> 0n0l0E0C0A0...+..........j.....p.I.#z...(~d...U.. [.5...J:.......l..9.....{6.#0!0...+.....0......].O.9..}d`.L...
< ~HTTP/1.0 404 Not Found
< Content-Type: text/html; charset=UTF-8
< X-Content-Type-Options: nosniff
< Date: Tue, 28 Apr 2015 22:42:40 GMT
< Server: sffe
< Content-Length: 1429
< X-XSS-Protection: 1; mode=block
< Alternate-Protocol: 80:quic,p=1
< 
< <!DOCTYPE html>
< <html lang=en>
<   <meta charset=utf-8>
<   <meta name=viewport content="initial-scale=1, minimum-scale=1, width=device-width">
<   <title>Error 404 (Not Found)!!1</title>
<   <style>
<     *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/errors/logo_sm_2.png) no-repeat}@media only screen and (min-resolution:192dpi){#logo{background:url(//www.google.com/images/errors/logo_sm_2_hr.png) no-repeat 0% 0%/100% 100%;-moz-border-image:url(//www.google.com/images/errors/logo_sm_2_hr.png) 0}}@media only screen and (-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/errors/logo_sm_2_hr.png) no-repeat;-webkit-background-size:100% 100%}}#logo{display:inline-block;height:55px;width:150px}
<   </style>
<   <a href=//www.google.com/><span id=logo aria-label=Google></span></a>
<   <p><b>404.</b> <ins>That...s an error.</ins>
<   <p>The requested URL <code>/ocsp</code> was not found on this server.  <ins>That...s all we know.</ins>

这就是问题2:这是否正确,OCSP已移动,并且不在OCSP URI上? 服务器是否已经统一迁移到OCSP装订,并且不再认为OCSP服务器很重要?


您是否尝试将-noverify添加到openssl ocsp?

-noverify在第一种情况下有效,尽管不能解释问题1中的错误,只需将其删除即可。我仍然不明白为什么找不到本地发行者证书。
罗伯特·韦弗

Answers:


6

关于1)

OCSP具有用于验证响应的“响应签名密钥/证书对”。该证书是在对以下内容的答复中给出的:

$ openssl ocsp -issuer chain.pem -cert wikipedia.pem -url http://ocsp2.globalsign.com/gsorganizationvalsha2g2 -header "HOST" "ocsp2.globalsign.com" -resp_text
-----BEGIN CERTIFICATE-----
[...]
UMiqxBNugzQ=
-----END CERTIFICATE-----

因此,我们将其保存到signcert.pem,看看发生了什么:

$ openssl ocsp -issuer chain_wikipedia.pem -cert wikipedia.pem -url http://ocsp2.globalsign.com/gsorganizationvalsha2g2 -header "HOST" "ocsp2.globalsign.com" -resp_text | sed -n '/-----BEGIN/,/-----END/p' > signcert.pem
$ openssl verify signcert.pem
signcert.pem: C = BE, O = GlobalSign nv-sa, CN = GlobalSign OV CA - SHA256 - G2 OCSP responder - 2, serialNumber = 20150914163800
error 20 at 0 depth lookup:unable to get local issuer certificate

好吧...猜猜我们缺少中间体了吗?

$ openssl x509 -noout -text -in signcert.pem  | grep -e 'Issuer:' -e '.crt'
Issuer: C=BE, O=GlobalSign nv-sa, CN=GlobalSign Organization Validation CA - SHA256 - G2

好的,没有颁发者URI字段...太脏了。让我们从CA中获取它并形成一个链:

$ curl https://secure.globalsign.com/cacert/gsorganizationvalsha2g2r1.crt | openssl x509 -inform der -outform pem >> signcert.pem

好的,这应该...:

$ openssl ocsp -VAfile signcert.pem -issuer chain_wikipedia.pem -cert wikipedia.pem -url http://ocsp2.globalsign.com/gsorganizationvalsha2g2 -header "HOST" "ocsp2.globalsign.com" -resp_text
[...]
-----BEGIN CERTIFICATE-----
[...]
/TiSgNCpgNg=
-----END CERTIFICATE-----
Response Verify Failure

... WTF?!哦,不同的签名证书?!

$ cat >> signcert.pem
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
^D

手指交叉...

$ openssl ocsp -VAfile signcert.pem -issuer chain_wikipedia.pem -cert wikipedia.pem -url http://ocsp2.globalsign.com/gsorganizationvalsha2g2 -header "HOST" "ocsp2.globalsign.com"
Response verify OK
wikipedia.pem: good
        This Update: Sep 15 17:01:20 2015 GMT
        Next Update: Sep 16 05:01:20 2015 GMT

真是的!

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