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=pod

=encoding utf8

=head1 NAME

L<Crypt::OPAQUE> 

=head2 PROTOCOL

L<https://datatracker.ietf.org/doc/draft-irtf-cfrg-opaque/>

=head1 FUNCTION

=head2 create_cleartext_credentials
 
 my $cleartext_credentials = create_cleartext_credentials($s_pub, $c_pub, $s_id, $c_id);

=head2 store

 my $store_r = store($randomized_pwd, $s_pub, $s_id, $c_id, $Nn, $Nseed, $group_name, $info, $DST, $hash_name, $expand_message_func, $mac_func);

=head2 recover

 my $recover_r = recover($randomized_pwd, $s_pub, $envelope, $s_id, $c_id, $Nseed, $group_name, $info, $DST, $hash_name, $expand_message_func, $mac_func);

=head2 create_registration_request

  my $registration_req_r = create_credential_request($request, $s_pub, $oprf_seed, $credential_identifier, $DSI, $Nseed, $group_name, $info, $DST, $hash_name, $expand_message_func, $point_compress_t);

=head2 create_registration_response

  my $registration_res_r = create_credential_response($request, $s_pub, $oprf_seed, $credential_identifier, $DSI, $envelope, $masking_key, $Nn, $Nseed, $group_name, $info, $DST, $hash_name, $expand_message_func, $point_compress_t, $pack_func);

=head2 finalize_registration_request
  
  my $registration_finalize_r = finalize_registration_request($request, $response, $pwd, $c_id, $s_id, $Nn, $Nseed, $group_name, $info, $DST, $hash_name, $expand_message_func, $mac_func, $pwd_harden_func);

=head2 derive_random_pwd

  my $randomize_pwd = derive_random_pwd($ec_params, $pwd, $blind, $evaluate_element, $hash_name, $harden_func);

=head2 create_credential_request
  
  my $cred_req_r = create_credential_request($request, $s_pub, $oprf_seed, $credential_identifier, $DSI, $Nseed, $group_name, $info, $DST, $hash_name, $expand_message_func, $point_compress_t);

=head2 create_credential_response

   my $cred_res_r = create_credential_response($request, $s_pub, $oprf_seed, $credential_identifier, $DSI, $envelope, $masking_key, $Nn, $Nseed, $group_name, $info, $DST, $hash_name, $expand_message_func, $point_compress_t, $pack_func);

=head2 recover_credentials

    my $recover_r = recover_credentials($cred_request, $cred_response, $pwd, $c_id, $s_id, $Nseed, $group_name, $info, $DST, $hash_name, $expand_message_func, $mac_func, $pwd_harden_func, $unpack_func);

=cut