Re: [openssl-users] X25519: how to generate public key?
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. -- Dr Stephen N. Henson. OpenSSL project core developer. Commercial tech support now available see: http://www.openssl.org -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
Re: [openssl-users] X25519: how to generate public key?
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. -- Dr Stephen N. Henson. OpenSSL project core developer. Commercial tech support now available see: http://www.openssl.org -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
