What is the meaning of "group element not on the curve"

[ulrichard]

What is the meaning of "group element not on the curve"

[JoseMoranUrena523]

The reason you are getting that error is because it is not a secp256k1 key, it is a secp256r1 key. Try using this:
extern crate libsecp256r1;
use libsecp256r1::{Message, PublicKey, PublicKeyFormat, Signature, verify};
extern crate x509_parser;
use x509_parser::pem::parse_x509_pem;
extern crate spki;
use spki::SubjectPublicKeyInfo; fn main() {
pub const PUBKEY_TEST: &str = "-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEQem4RK/YPgiT83UqNnIAx7GAFX3b
948NbKnilBKoD5t/4LSKDmP/X7qCrEIQ8TafiXB2r3mW9BPlX1mGZ0iYXw==
-----END PUBLIC KEY-----";
let (rem, pem) = parse_x509_pem(&PUBKEY_TEST.as_bytes()).unwrap();
assert!(rem.is_empty());
assert_eq!(pem.label, String::from("PUBLIC"));
let pub_key = SubjectPublicKeyInfo::try_from(pem.contents.as_slice()).unwrap();
assert_eq!(pub_key.subject_public_key.len(), 65);
assert_eq!(pub_key.subject_public_key[0], 4); // tag pubkey full
let pubkey = PublicKey::parse_slice(&pub_key.subject_public_key, Some(PublicKeyFormat::Full)).unwrap();