If you don’t use a passphrase, then the private key is not encrypted with any symmetric cipher – it is output completely unprotected. You can generate a keypair, supplying the password on the command-line using an invocation like (in this case, the password is foobar): openssl genrsa -aes128 -passout pass:foobar 3072 However, note that this … Read more
I realize that this is a very late (and long) answer. But considering how well this question seems to rank in search engine results, I figured it might be worth writing a decent answer for. A lot of what you will read below is borrowed from this demo and the OpenSSL docs. The code below … Read more
RHEL: /etc/pki/tls/openssl.cnf
It depends on the tools you can use. I doubt there is a JavaScript too that could do it directly within the browser. It also depends if it’s a one-off (always the same key) or whether you need to script it. Command-line / OpenSSL If you want to use something like OpenSSL on a unix … Read more
Because OpenSSL doesn’t offer API compatibility between versions This means that Apple can’t provide security updates without breaking existing apps. http://rentzsch.tumblr.com/post/33696323211/wherein-i-write-apples-technote-about-openssl-on-os-x
You don’t have to downgrade OpenSSL. With the introduction of openssl version 1.1.1 in Debian the defaults are set to more secure values by default. This is done in the /etc/ssl/openssl.cnf config file. At the end of the file there is: [system_default_sect] MinProtocol = TLSv1.2 CipherString = [email protected]=2 Debian now require as minimum the TLS … Read more
I had the same problem and solved it by passing path to a directory where CA keys are stored. On Ubuntu it was: openssl s_client -CApath /etc/ssl/certs/ -connect address.com:443
openssl rsa -in privkey.pem -pubout > key.pub That writes the public key to key.pub
Dupe: Difference between openSSL rsautl and dgst Closely related: Why are the RSA-SHA256 signatures I generate with OpenSSL and Java different? Different signatures when using C routines and openssl dgst, rsautl commands Signing 20-byte message with 256-bit RSA key working with openssl.exe but not in code Crossdupe: https://superuser.com/questions/943972/what-is-the-difference-between-openssl-pkeyutl-sign-and-openssl-rsautl-sign TLDR: dgst -sign for RSA does the … Read more
In practice, the most common reason for this happening seems to be that the .rnd file in your home directory is owned by root rather than your account. The quick fix: sudo rm ~/.rnd For more information, here’s the entry from the OpenSSL FAQ: Sometimes the openssl command line utility does not abort with a … Read more