Thank you for your quick answer.
Olivier
Le 14/03/2017 à 13:43, Dr. Stephen Henson a écrit :
On Tue, Mar 14, 2017, Olivier Meunier wrote:
Hi,
using openSSL 1.1.0e, I generate my private key using:
openssl genpkey -algorithm x25519 -out x25519.key.pem
But I cannot find how to generate the public key. I tried:
openssl ec -in x25519.key.pem -pubout -out x25519.key.pub.pem
but got the errors:
read EC key
unable to load Key
16084:error:0608308E:digital envelope
routines:EVP_PKEY_get0_EC_KEY:expecting a ec
key:crypto\evp\p_lib.c:319:
What is the right command to get the public key?
Thanks,
X25519 is trteated as a distinct algorithm, not as an EC curve.
You don't actually "generate" the public key you can extract or calculate the
public key corresponding to a private key though.
The pkey command can do this for any supported algorithm:
openssl pkey -in privkey.pem -pubout -out pubkey.pem
Steve.
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Dr Stephen N. Henson. OpenSSL project core developer.
Commercial tech support now available see: http://www.openssl.org
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