hash function as returned by [crypto.Hash.String] // or the empty string to indicate that the message is signed directly. func SignPKCS1v15(priv *PrivateKey, hash string, hashed []byte) ([]byte, error) { fipsSelfTest() fips140.RecordApproved() checkApprovedHashNam(hash) return signPKCS1v15(priv, hash, hashed) } func signPKCS1v15(priv *PrivateKey, hash string, hashed []byte) ([]byte, error) { em, err := pkcs1v15ConstructEM(&priv.pub, hash, hashed) if err != nil { return nil, err } return decrypt(priv,...