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My domain is: locahost
I ran this command:
openssl req -x509 -out localhost.crt -keyout localhost.key \
-newkey rsa:2048 -nodes -sha256 \
-subj '/CN=localhost' -extensions EXT -config <( \
printf "[dn]\nCN=localhost\n[req]\ndistinguished_name = dn\n[EXT]\nsubjectAltName=DNS:localhost\nkeyUsage=digitalSignature\nextendedKeyUsage=serverAuth")
It produced this output:
C:\WINDOWS\system32>openssl req -x509 -out localhost.crt -keyout localhost.key
‘openssl’ is not recognized as an internal or external command,
operable program or batch file.
C:\WINDOWS\system32> -newkey rsa:2048 -nodes -sha256
‘-newkey’ is not recognized as an internal or external command,
operable program or batch file.
C:\WINDOWS\system32> -subj ‘/CN=localhost’ -extensions EXT -config <(
The system cannot find the file specified.
C:\WINDOWS\system32> printf “[dn]\nCN=localhost\n[req]\ndistinguished_name = dn\n[EXT]\nsubjectAltName=DNS:localhost\nkeyUsage=digitalSignature\nextendedKeyUsage=serverAuth”)
My web server is (include version):
The operating system my web server runs on is (include version):
My hosting provider, if applicable, is:
I can login to a root shell on my machine (yes or no, or I don’t know):
I use Windows 10 administrator command prompt
I’m using a control panel to manage my site (no, or provide the name and version of the control panel):
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you’re using Certbot):
Did you do anything first to install OpenSSL on your system? I’m not 100% sure of this because I don’t use Windows, but I don’t think OpenSSL comes preinstalled on Windows systems, but rather has to be downloaded and installed separately. The error you got has two parts:
(1) It looks like your system couldn’t find OpenSSL installed at all, so it needs to be installed.
(2) Also, it looks like you pasted a single-line command as multiple lines, so the lines after the first were incorrectly interpreted as separate commands. While the backslashes (
\) at the end of each line were meant to prevent that outcome, it seems they don’t have the intended effect. I see three or four indications that the command that you followed was designed for a Unix rather than a Windows environment; is it possible that you’re following a Unix-specific tutorial rather than one that includes relevant information for a Windows system? (For example, OpenSSL usually is preinstalled on most Unix systems and so there wouldn’t need to be a separate installation step for most Unix users.)
hi schoen, I have followed this tutorial which is windows based :https://tecadmin.net/install-openssl-on-windows/
I can’t get Linux installed in this Windows OS computer so I have to content with still using it…
Could you let me know the command to generate the certificate then?
there is one missing step in that tutorial.
If you create a new environment variable, you have to logout / login or reboot your Windows. So that variable works.
in a CommandBox to see, if the new path is active.
to go to that directory.
I have done all that already. Because the steps are quite clear. But, I am still not able to generate the certificate.
You’re trying to get a Let’s Encrypt certificate for localhost? That won’t ever work–Let’s Encrypt only issues certs for public domain names.
Could you let me know why this appeared in Let’sEncrypt site :https://letsencrypt.org/docs/certificates-for-localhost/
That’s a self signed certificate, not a public trusted certificate.
But there you find the Linux command, may not work under Windows.
and write the command in one line.
I did that but now there is a new error:
C:\Program Files\OpenSSL-Win64\bin>openssl req -x509 -out localhost.crt -keyout localhost.key
Generating a RSA private key
writing new private key to ‘localhost.key’
Enter PEM pass phrase:
Verifying - Enter PEM pass phrase:
4156:error:2807106B:UI routines:UI_process:processing error:crypto\ui\ui_lib.c:545:while reading strings
4156:error:0906406D:PEM routines:PEM_def_callback:problems getting password:crypto\pem\pem_lib.c:59:
4156:error:0907E06F:PEM routines:do_pk8pkey:read key:crypto\pem\pem_pk8.c:83:
How to resolve the error ?
@tangara, that error is caused when the password you entered the second time didn’t match the password you entered the first time.
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