[openssl-users] genpkey for ed25519

Matt Caswell matt at openssl.org
Sat Jul 28 11:00:59 UTC 2018

On 27/07/18 15:04, Tomas Mraz wrote:
> On Fri, 2018-07-27 at 09:44 -0400, Robert Moskowitz wrote:
>> Here we go again with figuring out what to put in the command
>> lines.  
>> Dr. Google is not giving up enough answers.
>> For ecdsa I started with:
>> openssl genpkey -aes256 -algorithm ec\
>>   -pkeyopt ec_paramgen_curve:prime256v1\
>>   -outform pem -pkeyopt ec_param_enc:named_curve\
>>   -out $dir/private/ca.key.pem
>> I found one reference that I should use -algorithm ed25519 (though
>> the 
>> example used caps: ED25519)
> Yes, it is case insensitive.
>> But I have not found recommendation for ec_parmgen_curve or
>> ec_param_enc
>> Can someone point me to the information on values for these (and I 
>> suspect I will be hitting others as I go).
> Just do not use these options.

Just to add to this, the genpkey documentation gives an example for
X25519 and ED448. Its the same for ED25519:



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