invalid private key") } p, err := c.newPoint().ScalarBaseMult(key) if err != nil { // This is unreachable because the only error condition of // ScalarBaseMult is if the input is not the right size. panic("crypto/ecdh: internal error: nistec ScalarBaseMult failed for a fixed-size input") } publicKey := p.Bytes() if len(publicKey) == 1 { // The encoding of the identity is a single 0x00 byte. This is // unreachable because the only scalar that generates the identity is // zero, which is rejected above....