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diff --git a/doc/man7/life_cycle-mac.pod b/doc/man7/life_cycle-mac.pod new file mode 100644 index 000000000000..60b8b55d4bf0 --- /dev/null +++ b/doc/man7/life_cycle-mac.pod @@ -0,0 +1,218 @@ +=pod + +=head1 NAME + +life_cycle-mac - The MAC algorithm life-cycle + +=head1 DESCRIPTION + +All message authentication codes (MACs) +go through a number of stages in their life-cycle: + +=over 4 + +=item start + +This state represents the MAC before it has been allocated. It is the +starting state for any life-cycle transitions. + +=item newed + +This state represents the MAC after it has been allocated. + +=item initialised + +This state represents the MAC when it is set up and capable of processing +input. + +=item updated + +This state represents the MAC when it is set up and capable of processing +additional input or generating output. + +=item finaled + +This state represents the MAC when it has generated output. + +=item freed + +This state is entered when the MAC is freed. It is the terminal state +for all life-cycle transitions. + +=back + +=head2 State Transition Diagram + +The usual life-cycle of a MAC is illustrated: + +=begin man + + +-------------------+ + | start | + +-------------------+ + | + | EVP_MAC_CTX_new + v + +-------------------+ + | newed | + +-------------------+ + | + | EVP_MAC_init + v + +-------------------+ + +> | initialised | <+ + | +-------------------+ | + | | | + | | EVP_MAC_update | EVP_MAC_init + | v | + EVP_MAC_init | +-------------------+ | + | | updated | -+ + | +-------------------+ + | | | + | | EVP_MAC_final | EVP_MAC_finalXOF + | v v + | +-------------------+ + +- | finaled | + +-------------------+ + | + | EVP_MAC_CTX_free + v + +-------------------+ + | freed | + +-------------------+ + +=end man + +=for html <img src="img/mac.png"> + +=head2 Formal State Transitions + +This section defines all of the legal state transitions. +This is the canonical list. + +=begin man + + Function Call --------------------- Current State ---------------------- + start newed initialised updated finaled freed + EVP_MAC_CTX_new newed + EVP_MAC_init initialised initialised initialised initialised + EVP_MAC_update updated updated + EVP_MAC_final finaled + EVP_MAC_finalXOF finaled + EVP_MAC_CTX_free freed freed freed freed freed + EVP_MAC_CTX_get_params newed initialised updated + EVP_MAC_CTX_set_params newed initialised updated + EVP_MAC_CTX_gettable_params newed initialised updated + EVP_MAC_CTX_settable_params newed initialised updated + +=end man + +=begin html + +<table style="border:1px solid; border-collapse:collapse"> +<tr><th style="border:1px solid" align="left">Function Call</th> + <th style="border:1px solid" colspan="6">Current State</th></tr> +<tr><th style="border:1px solid"></th> + <th style="border:1px solid" align="center">start</th> + <th style="border:1px solid" align="center">newed</th> + <th style="border:1px solid" align="center">initialised</th> + <th style="border:1px solid" align="center">updated</th> + <th style="border:1px solid" align="center">finaled</th> + <th style="border:1px solid" align="center">freed</th></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_CTX_new</th> + <td style="border:1px solid" align="center">newed</td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_init</th> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center">initialised</td> + <td style="border:1px solid" align="center">initialised</td> + <td style="border:1px solid" align="center">initialised</td> + <td style="border:1px solid" align="center">initialised</td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_update</th> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center">updated</td> + <td style="border:1px solid" align="center">updated</td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_final</th> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center">finaled</td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_finalXOF</th> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center">finaled</td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_CTX_free</th> + <td style="border:1px solid" align="center">freed</td> + <td style="border:1px solid" align="center">freed</td> + <td style="border:1px solid" align="center">freed</td> + <td style="border:1px solid" align="center">freed</td> + <td style="border:1px solid" align="center">freed</td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_CTX_get_params</th> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center">newed</td> + <td style="border:1px solid" align="center">initialised</td> + <td style="border:1px solid" align="center">updated</td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_CTX_set_params</th> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center">newed</td> + <td style="border:1px solid" align="center">initialised</td> + <td style="border:1px solid" align="center">updated</td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_CTX_gettable_params</th> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center">newed</td> + <td style="border:1px solid" align="center">initialised</td> + <td style="border:1px solid" align="center">updated</td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td></tr> +<tr><th style="border:1px solid" align="left">EVP_MAC_CTX_settable_params</th> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center">newed</td> + <td style="border:1px solid" align="center">initialised</td> + <td style="border:1px solid" align="center">updated</td> + <td style="border:1px solid" align="center"></td> + <td style="border:1px solid" align="center"></td></tr> +</table> + +=end html + +=head1 NOTES + +At some point the EVP layer will begin enforcing the transitions described +herein. + +=head1 SEE ALSO + +L<provider-mac(7)>, L<EVP_MAC(3)>. + +=head1 HISTORY + +The provider MAC interface was introduced in OpenSSL 3.0. + +=head1 COPYRIGHT + +Copyright 2021 The OpenSSL Project Authors. All Rights Reserved. + +Licensed under the Apache License 2.0 (the "License"). You may not use +this file except in compliance with the License. You can obtain a copy +in the file LICENSE in the source distribution or at +L<https://www.openssl.org/source/license.html>. + +=cut |