Constant ECDSA_P521 

pub const ECDSA_P521: AlgorithmIdentifier;

Available on crate feature crypto only.

AlgorithmIdentifier for id-ecPublicKey with named curve secp521r1.

This is:

# ecPublicKey
OBJECT_IDENTIFIER { 1.2.840.10045.2.1 }
# secp521r1
OBJECT_IDENTIFIER { 1.3.132.0.35 }