dsaparam error OpenSSL 1.1.1d

Viktor Dukhovni openssl-users at dukhovni.org
Mon Nov 11 05:42:59 UTC 2019

On Mon, Nov 11, 2019 at 10:59:52AM +0530, shiva kumar wrote:

> *openssl dsaparam 128 -rand file *
> is taking long time processing the command and not producing any output.

It is waiting for *input* (to decode already generated parameters).
If you want to generate a key you need to provide the "-genkey"
option.  And 128 bit primes are way too short for DSA.  You should
generally use 2048 bits, and definitely avoid anything less than
1024 bits.  The below example generates a 1280-bit key, which is
about as small as I'd be generally willing to go for short to
medium-term keys.

    $ openssl dsaparam -genkey 1280
    Generating DSA parameters, 1280 bit long prime
    This could take some time
    -----END DSA PARAMETERS-----
    -----END DSA PRIVATE KEY-----


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