blocks|key|568566|text|试验证书|type|unstyled|depth|inlineStyleRanges|entityRanges|data|568567|568568|有几个CA将为您生成短期试用证书。|568569|568570|这里有一个：|568571|568572|https://www.instantssl.com/free-ssl-certificate.html|offset|length|568573|短证书|568574|568575|还有一些CA会为您生成更长寿的免费证书。StartCOM/StartSSL已经这样做了好几年了。|568576|https://www.startssl.com/|568577|568578|StartCom+on+维基百科|568579|568580|关于数字海洋的说明|568581|自有CA|568582|568583|有几个在线教程关于如何使用OpenSSL滚动您自己的CA。|568584|DataCenterOverlords.com：(创建自己的SSL证书颁发机构(并转储自签名证书)+(归档这里.)|unordered-list-item|568585|TLDP.org：[http://www.tldp.org/HOWTO/SSL-Certificates-HOWTO/c118.html]+(SSL证书如何操作)|568586|我更喜欢伊万·里斯蒂斯的小册子：“OpenSSL食谱”。(称为“创建私人证书颁发机构”的分节(页的下三分之一)|entityMap|0|LINK|mutability|MUTABLE|url|1|2|https://en.wikipedia.org/wiki/StartCom|3|https://www.digitalocean.com/community/tutorials/how-to-set-up-apache-with-a-free-signed-ssl-certificate-on-a-vps|4|http://datacenteroverlords.com/2012/03/01/creating-your-own-ssl-certificate-authority/|5|https://archive.today/sy0IY|6|http://www.tldp.org/HOWTO/SSL-Certificates-HOWTO/c118.html]|7|https://www.feistyduck.com/library/openssl-cookbook/online/ch-openssl.html^0|0|0|0|0|0|0|0|1G|0|0|0|0|0|0|P|1|0|0|C|4|2|0|0|0|9|3|0|0|0|0|O|P|4|1H|2|5|0|9|1O|6|0|G|B|7^^$0|@$1|2|3|4|5|6|7|1U|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|1V|8|@]|9|@]|A|$]]|$1|C|3|D|5|6|7|1W|8|@]|9|@]|A|$]]|$1|E|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|20|8|@]|9|@$K|21|L|22|1|23]]|A|$]]|$1|M|3|N|5|6|7|24|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|25|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|26|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|27|8|@]|9|@$K|28|L|29|1|2A]]|A|$]]|$1|T|3|-4|5|6|7|2B|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|2C|8|@]|9|@$K|2D|L|2E|1|2F]]|A|$]]|$1|W|3|-4|5|6|7|2G|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|2H|8|@]|9|@$K|2I|L|2J|1|2K]]|A|$]]|$1|Z|3|10|5|6|7|2L|8|@]|9|@]|A|$]]|$1|11|3|-4|5|6|7|2M|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|2N|8|@]|9|@]|A|$]]|$1|14|3|15|5|16|7|2O|8|@]|9|@$K|2P|L|2Q|1|2R]|$K|2S|L|2T|1|2U]]|A|$]]|$1|17|3|18|5|16|7|2V|8|@]|9|@$K|2W|L|2X|1|2Y]]|A|$]]|$1|19|3|1A|5|6|7|2Z|8|@]|9|@$K|30|L|31|1|32]]|A|$]]]|1B|$1C|$5|1D|1E|1F|A|$1G|J]]|1H|$5|1D|1E|1F|A|$1G|S]]|1I|$5|1D|1E|1F|A|$1G|1J]]|1K|$5|1D|1E|1F|A|$1G|1L]]|1M|$5|1D|1E|1F|A|$1G|1N]]|1O|$5|1D|1E|1F|A|$1G|1P]]|1Q|$5|1D|1E|1F|A|$1G|1R]]|1S|$5|1D|1E|1F|A|$1G|1T]]]]

Trial certs 
There are several CAs that will generate short-lived trial certificates for you. 
Here's one: 
<a href="https://www.instantssl.com/free-ssl-certificate.html" rel="nofollow">https://www.instantssl.com/free-ssl-certificate.html</a>

Short certs 
And there are some CAs that will generate longer lived free certificates for you.
StartCOM/StartSSL has been doing this for several years.

<a href="https://www.startssl.com/" rel="nofollow">https://www.startssl.com/</a> 
StartCom on <a href="https://en.wikipedia.org/wiki/StartCom" rel="nofollow">Wikipedia</a> 
<a href="https://www.digitalocean.com/community/tutorials/how-to-set-up-apache-with-a-free-signed-ssl-certificate-on-a-vps" rel="nofollow">Instructions on DigitalOcean</a>

Own CA 
There are several tutorials online about how to roll your own CA with OpenSSL.

<ul>
<li>DataCenterOverlords.com: <a href="http://datacenteroverlords.com/2012/03/01/creating-your-own-ssl-certificate-authority/" rel="nofollow">Creating Your Own SSL Certificate Authority (and Dumping Self Signed Certs)</a> (Archived <a href="https://archive.today/sy0IY" rel="nofollow">here</a>.)</li>
<li>TLDP.org: [<a href="http://www.tldp.org/HOWTO/SSL-Certificates-HOWTO/c118.html]" rel="nofollow">http://www.tldp.org/HOWTO/SSL-Certificates-HOWTO/c118.html]</a> (SSL Certificates HOWTO)</li>
</ul>

I prefer Ivan Ristic's booklet: <a href="https://www.feistyduck.com/library/openssl-cookbook/online/ch-openssl.html" rel="nofollow">"OpenSSL cookbook"</a>. (Subsection called "Creating a Private Certification Authority" (Bottom third of page.)

blocks|key|568403|text|您可以使用OpenSSL生成您自己的个人证书颁发机构，您可以用于测试目的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|568404|下面是一个例子：http://www.dylanbeattie.net/docs/openssl_艾丽思_ssl_howto.html|offset|length|entityMap|0|LINK|mutability|MUTABLE|url|http://www.dylanbeattie.net/docs/openssl_iis_ssl_howto.html^0|0|8|1N|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]]|F|$G|$5|H|I|J|A|$K|L]]]]

You can use OpenSSL to generate your own personal certificate authority that you can use for testing purposes. 

Here is one example:
<a href="http://www.dylanbeattie.net/docs/openssl_iis_ssl_howto.html" rel="nofollow">http://www.dylanbeattie.net/docs/openssl_iis_ssl_howto.html</a>

Tried a lot get my test csr signed from root CA(trial versions option), somehow i am not getting it dues to some of their internal check. Few questions that cropped up 

<ol>
<li>Can i somehow signed that myself ?(its only for learning purpose)</li>
<li>any CA who can sign it on trial basis(which worked for some one)</li>
</ol>

went through many posts/blogs but couldn't find the answers

<a href="https://security.stackexchange.com/questions/15887/ssl-certificate-signing-by-a-ca">post1</a>
<a href="https://security.stackexchange.com/questions/82444/clarification-needed-on-csr-signing-process">post2</a>

UPDATE on next Question 

While downloading the certificate, it popped up saying "creating a private key” with passphrase.
 1. Why it’s asking to create a private key? What is its use? (say PK1)
 2. While creating the CSR, i already had the private key (SAY PK2). Are PK1 and PK2 same?
 3. Someone from CA can also get it, like i did, so how it’s not vulnerable to attack?

I completed the wizard, and downloaded the certificate with PK1.

I referred all the possible below links but not getting above answers.

<a href="https://security.stackexchange.com/questions/15887/ssl-certificate-signing-by-a-ca">post3</a>
<a href="https://security.stackexchange.com/questions/82444/clarification-needed-on-csr-signing-process">post4</a>

CSR Signing simulation

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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尝试了很多让我的测试csr从根CA(试用版选项)签名，不知怎么的，我没有得到它的一些内部检查。出现的几个问题我能自己签个字吗？(这只是为了学习)任何可以在试验基础上签署的CA (为某一人工作)浏览了许多帖子/博客，但找不到答案post1 post2关于下一个问题的更新下载证书时，会弹出带有密码的“创建私钥”。1.为什么要创建私钥?它的用途是什么？(比如PK1) 2。在创建CSR时，我已经拥有了私钥

问CSR签名仿真
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