openssl(1.1.0.b) is not support secp256r1?(openssl ecparam - list_curves)

Question

my server and client need secp256r1 in handshake, but openssl seems like do not support secp256r1.

when I command openssl ecparam -list_curves, i couldn't see secp256r1

i used openssl 1.1.0b. I wonder openssl not support secp256r1?

Answer 1

The OpenSSL supports secp256r1, it is just called prime256v1. Have a look at the section 2.1.1.1 in RFC 5480.

-- Note that in [PKI-ALG] the secp192r1 curve was referred to as

-- prime192v1 and the secp256r1 curve was referred to as

-- prime256v1.