Rob*_*ver 13 openssl x509 ocsp
我正在尝试设置 OCSP 验证例程，因此希望首先适应环境。在例如OpenSSL: Manually verify a certificate against an OCSP 中找到了优秀的教程。
出现多个问题，所以请耐心等待。
自该教程以来发生了一些变化，但我认为要点是：
1）获取您要验证的证书，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，所以在.
3）确定ocsp URI，例如
openssl x509 -noout -ocsp_uri -in wikipedia.pem
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
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
（回答者？）
我读到这是由于虚拟化问题，所以
openssl ocsp -issuer chain.pem -cert wikipedia.pem -url http://ocsp2.globalsign.com/gsorganizationvalsha2g2 -header "HOST" "ocsp2.globalsign.com"
这产生
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
所以我得到 OCSP 返回证书是好的，但这导致了问题 1： 为什么错误“无法获得本地颁发者证书”？
好的，用 Google 再试一次。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。使用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 中？ 是不是服务器已经统一转移到 OCSP 装订，不再认为 OCSP 服务器重要了？
关于 1)
OCSP 有一个“响应签名密钥/证书对”用于验证响应。此证书是在对以下内容的响应中提供的：
$ 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-----
所以让我们把它保存到 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？
$ 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，没有发行者 URI 字段......这很脏。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
...... 跆拳道？！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
该死的！
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