Adding upstream version 4.22.0.upstream/4.22.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 205 insertions, 0 deletions

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+.\" -*- mode: troff; coding: utf-8 -*-
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+.\" ========================================================================
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+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
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+.\" ========================================================================
+.\"
+.IX Title "LIFE_CYCLE-CIPHER 7ssl"
+.TH LIFE_CYCLE-CIPHER 7ssl 2024-01-30 3.2.1 OpenSSL
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+life_cycle\-cipher \- The cipher algorithm life\-cycle
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+All symmetric ciphers (CIPHERs) go through a number of stages in their
+life-cycle:
+.IP start 4
+.IX Item "start"
+This state represents the CIPHER before it has been allocated.  It is the
+starting state for any life-cycle transitions.
+.IP newed 4
+.IX Item "newed"
+This state represents the CIPHER after it has been allocated.
+.IP initialised 4
+.IX Item "initialised"
+These states represent the CIPHER when it is set up and capable of processing
+input.  There are three possible initialised states:
+.RS 4
+.IP "initialised using EVP_CipherInit" 4
+.IX Item "initialised using EVP_CipherInit"
+.PD 0
+.IP "initialised for decryption using EVP_DecryptInit" 4
+.IX Item "initialised for decryption using EVP_DecryptInit"
+.IP "initialised for encryption using EVP_EncryptInit" 4
+.IX Item "initialised for encryption using EVP_EncryptInit"
+.RE
+.RS 4
+.RE
+.IP updated 4
+.IX Item "updated"
+.PD
+These states represent the CIPHER when it is set up and capable of processing
+additional input or generating output.  The three possible states directly
+correspond to those for initialised above.  The three different streams should
+not be mixed.
+.IP finaled 4
+.IX Item "finaled"
+This state represents the CIPHER when it has generated output.
+.IP freed 4
+.IX Item "freed"
+This state is entered when the CIPHER is freed.  It is the terminal state
+for all life-cycle transitions.
+.SS "State Transition Diagram"
+.IX Subsection "State Transition Diagram"
+The usual life-cycle of a CIPHER is illustrated:
+                                 +---------------------------+
+                                 |                           |
+                                 |           start           |
+                                 |                           |
+                                 +---------------------------+   + - - - - - - - - - - - - - +
+                                       |                         '  any of the initialised   '
+                                       | EVP_CIPHER_CTX_new      ' updated or finaled states '
+                                       v                         '                           '
+                                 +---------------------------+   + - - - - - - - - - - - - - +
+                                 |                           |      |
+                                 |           newed           |      | EVP_CIPHER_CTX_reset
+                                 |                           | <----+
+                                 +---------------------------+
+                                    |   |                 |
+                          +---------+   |                 +---------+
+          EVP_DecryptInit |             | EVP_CipherInit            | EVP_EncryptInit
+                          v             v                           v
+ +---------------------------+   +---------------------------+   +---------------------------+
+ |                           |   |                           |   |                           |
+ |        initialised        |   |        initialised        |   |        initialised        |
+ |       for decryption      |   |                           |   |       for encryption      |
+ +---------------------------+   +---------------------------+   +---------------------------+
+   |                                   |                                                   |
+   | EVP_DecryptUpdate                 | EVP_CipherUpdate                EVP_EncryptUpdate |
+   |                                   v                                                   |
+   |                             +---------------------------+                             |
+   |                             |                           |--------------------+        |
+   |                             |          updated          |   EVP_CipherUpdate |        |
+   |                             |                           | <------------------+        |
+   v                             +---------------------------+                             v
+ +---------------------------+                         |         +---------------------------+
+ |                           |---------------------+   |         |                           |
+ |          updated          |   EVP_DecryptUpdate |   |         |          updated          |------+
+ |       for decryption      | <-------------------+   |         |       for encryption      |      |
+ +---------------------------+                         |         +---------------------------+      |
+                          |            EVP_CipherFinal |            |           ^                   |
+                          +-------+                    |   +--------+           |                   |
+                 EVP_DecryptFinal |                    |   | EVP_EncryptFinal   +-------------------+
+                                  v                    v   v                      EVP_EncryptUpdate
+                                 +---------------------------+
+                                 |                           |-----------------------------+
+                                 |          finaled          |                             |
+                                 |                           | <---------------------------+
+                                 +---------------------------+   EVP_CIPHER_CTX_get_params
+                                       |                             (AEAD encryption)
+                                       | EVP_CIPHER_CTX_free
+                                       v
+                                 +---------------------------+
+                                 |                           |
+                                 |           freed           |
+                                 |                           |
+                                 +---------------------------+
+.SS "Formal State Transitions"
+.IX Subsection "Formal State Transitions"
+This section defines all of the legal state transitions.
+This is the canonical list.
+ Function Call                ---------------------------------------------- Current State -----------------------------------------------
+                              start   newed    initialised   updated     finaled   initialised   updated    initialised   updated    freed
+                                                                                    decryption  decryption   encryption  encryption
+ EVP_CIPHER_CTX_new           newed
+ EVP_CipherInit                    initialised initialised initialised initialised initialised initialised  initialised initialised
+ EVP_DecryptInit                   initialised initialised initialised initialised initialised initialised  initialised initialised
+                                    decryption  decryption  decryption  decryption  decryption  decryption  decryption  decryption
+ EVP_EncryptInit                   initialised initialised initialised initialised initialised initialised  initialised initialised
+                                    encryption  encryption  encryption  encryption  encryption  encryption  encryption  encryption
+ EVP_CipherUpdate                                updated     updated
+ EVP_DecryptUpdate                                                                   updated     updated
+                                                                                    decryption  decryption
+ EVP_EncryptUpdate                                                                                            updated     updated
+                                                                                                             encryption  encryption
+ EVP_CipherFinal                                             finaled
+ EVP_DecryptFinal                                                                                finaled
+ EVP_EncryptFinal                                                                                                         finaled
+ EVP_CIPHER_CTX_free          freed   freed       freed       freed       freed       freed       freed        freed       freed
+ EVP_CIPHER_CTX_reset                 newed       newed       newed       newed       newed       newed        newed       newed
+ EVP_CIPHER_CTX_get_params            newed    initialised   updated               initialised   updated    initialised   updated
+                                                                                    decryption  decryption   encryption  encryption
+ EVP_CIPHER_CTX_set_params            newed    initialised   updated               initialised   updated    initialised   updated
+                                                                                    decryption  decryption   encryption  encryption
+ EVP_CIPHER_CTX_gettable_params       newed    initialised   updated               initialised   updated    initialised   updated
+                                                                                    decryption  decryption   encryption  encryption
+ EVP_CIPHER_CTX_settable_params       newed    initialised   updated               initialised   updated    initialised   updated
+                                                                                    decryption  decryption   encryption  encryption
+.SH NOTES
+.IX Header "NOTES"
+At some point the EVP layer will begin enforcing the transitions described
+herein.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBprovider\-cipher\fR\|(7), \fBEVP_EncryptInit\fR\|(3)
+.SH COPYRIGHT
+.IX Header "COPYRIGHT"
+Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+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
+<https://www.openssl.org/source/license.html>.