Provide documentation for missing SSL_SESSION_* functions

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3052)

doc/man3/SSL_SESSION_free.pod

@@ -2,16 +2,26 @@
 
 =head1 NAME
 
-SSL_SESSION_free - free an allocated SSL_SESSION structure
+SSL_SESSION_new,
+SSL_SESSION_up_ref,
+SSL_SESSION_free - create, free and manage SSL_SESSION structures
 
 =head1 SYNOPSIS
 
  #include <openssl/ssl.h>
 
+ SSL_SESSION *SSL_SESSION_new(void);
+ int SSL_SESSION_up_ref(SSL_SESSION *ses);
  void SSL_SESSION_free(SSL_SESSION *session);
 
 =head1 DESCRIPTION
 
+SSL_SESSION_new() creates a new SSL_SESSION structure and returns a pointer to
+it.
+
+SSL_SESSION_up_ref() increments the reference count on the given SSL_SESSION
+structure.
+
 SSL_SESSION_free() decrements the reference count of B<session> and removes
 the B<SSL_SESSION> structure pointed to by B<session> and frees up the allocated
 memory, if the reference count has reached 0.
@@ -44,7 +54,10 @@ incorrect reference counts and therefore program failures.
 
 =head1 RETURN VALUES
 
-SSL_SESSION_free() does not provide diagnostic information.
+SSL_SESSION_new returns a pointer to the newly allocated SSL_SESSION structure
+or NULL on error.
+
+SSL_SESSION_up_ref returns 1 on success or 0 on error.
 
 =head1 SEE ALSO
 

doc/man3/SSL_SESSION_get0_id_context.pod

@@ -2,7 +2,9 @@
 
 =head1 NAME
 
-SSL_SESSION_get0_id_context - get the SSL ID context associated with a session
+SSL_SESSION_get0_id_context,
+SSL_SESSION_set1_id_context
+- get and set the SSL ID context associated with a session
 
 =head1 SYNOPSIS
 
@@ -10,9 +12,14 @@ SSL_SESSION_get0_id_context - get the SSL ID context associated with a session
 
  const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s,
                                                   unsigned int *len)
+ int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
+                                unsigned int sid_ctx_len);
 
 =head1 DESCRIPTION
 
+See L<SSL_CTX_set_session_id_context(3)> for further details on session ID
+contexts.
+
 SSL_SESSION_get0_id_context() returns the ID context associated with
 the SSL/TLS session B<s>. The length of the ID context is written to
 B<*len> if B<len> is not NULL.
@@ -20,6 +27,14 @@ B<*len> if B<len> is not NULL.
 The value returned is a pointer to an object maintained within B<s> and
 should not be released.
 
+SSL_SESSION_set1_id_context() takes a copy of the provided ID context given in
+B<sid_ctx> and associates it with the session B<s>. The length of the ID context
+is given by B<sid_ctx_len> which must not exceed SSL_MAX_SID_CTX_LENGTH bytes.
+
+=head1 RETURN VALUES
+
+SSL_SESSION_set1_id_context() returns 1 on success or 0 on error.
+
 =head1 SEE ALSO
 
 L<ssl(7)>,

doc/man3/SSL_SESSION_get0_peer.pod

@@ -0,0 +1,38 @@
+=pod
+
+=head1 NAME
+
+SSL_SESSION_get0_peer
+- get details about peer's certificate for a session
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ X509 *SSL_SESSION_get0_peer(SSL_SESSION *s);
+
+=head1 DESCRIPTION
+
+SSL_SESSION_get0_peer() returns the peer certificate associated with the session
+B<s> or NULL if no peer certificate is available. The caller should not free the
+returned value (unless L<X509_up_ref(3)> has also been called).
+
+=head1 RETURN VALUES
+
+SSL_SESSION_get0_peer() returns a pointer to the peer certificate or NULL if
+no peer certificat is available.
+
+=head1 SEE ALSO
+
+L<ssl(7)>
+
+=head1 COPYRIGHT
+
+Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (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

doc/man3/SSL_SESSION_get_compress_id.pod

@@ -0,0 +1,39 @@
+=pod
+
+=head1 NAME
+
+SSL_SESSION_get_compress_id
+- get details about the compression associated with a session
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s);
+
+=head1 DESCRIPTION
+
+If compression has been negotiated for an ssl session then
+SSL_SESSION_get_compress_id() will return the id for the compression method or
+0 otherwise. The only built-in supported compression method is zlib which has an
+id of 1.
+
+=head1 RETURN VALUES
+
+SSL_SESSION_get_compress_id() returns the id of the compression method or 0 if
+none.
+
+=head1 SEE ALSO
+
+L<ssl(7)>
+
+=head1 COPYRIGHT
+
+Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (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

doc/man3/SSL_SESSION_get_ex_data.pod

@@ -0,0 +1,47 @@
+=pod
+
+=head1 NAME
+
+SSL_SESSION_set_ex_data,
+SSL_SESSION_get_ex_data
+- get and set application specific data on a session
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ int SSL_SESSION_set_ex_data(SSL_SESSION *ss, int idx, void *data);
+ void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx);
+
+=head1 DESCRIPTION
+
+SSL_SESSION_set_ex_data() enables an application to store arbitrary application
+specific data B<data> in an SSL_SESSION structure B<ss>. The index B<idx> should
+be a value previously returned from a call to L<CRYPTO_get_ex_new_index(3)>.
+
+SSL_SESSION_get_ex_data() retrieves application specific data previously stored
+in an SSL_SESSION structure B<s>. The B<idx> value should be the same as that
+used when originally storing the data.
+
+=head1 RETURN VALUES
+
+SSL_SESSION_set_ex_data() returns 1 for success or 0 for failure.
+
+SSL_SESSION_get_ex_data() returns the previously stored value or NULL on
+failure. NULL may also be a valid value.
+
+=head1 SEE ALSO
+
+L<ssl(7)>,
+L<CRYPTO_get_ex_new_index(3)>
+
+=head1 COPYRIGHT
+
+Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (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

doc/man3/SSL_SESSION_get_time.pod

@@ -3,7 +3,7 @@
 =head1 NAME
 
 SSL_SESSION_get_time, SSL_SESSION_set_time, SSL_SESSION_get_timeout,
-SSL_SESSION_set_timeout
+SSL_SESSION_set_timeout,
 SSL_get_time, SSL_set_time, SSL_get_timeout, SSL_set_timeout
 - retrieve and manipulate session time and timeout settings
 

doc/man3/SSL_SESSION_print.pod

@@ -0,0 +1,47 @@
+=pod
+
+=head1 NAME
+
+SSL_SESSION_print,
+SSL_SESSION_print_fp,
+SSL_SESSION_print_keylog
+- printf information about a session
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ int SSL_SESSION_print(BIO *fp, const SSL_SESSION *ses);
+ int SSL_SESSION_print_fp(FILE *fp, const SSL_SESSION *ses);
+ int SSL_SESSION_print_keylog(BIO *bp, const SSL_SESSION *x);
+
+=head1 DESCRIPTION
+
+SSL_SESSION_print() prints summary information about the session provided in
+B<ses> to the BIO B<fp>.
+
+SSL_SESSION_print_fp() does the same as SSL_SESSION_print() except it prints it
+to the FILE B<fp>.
+
+SSL_SESSION_print_keylog() prints session information to the provided BIO <bp>
+in NSS keylog format.
+
+=head1 RETURN VALUES
+
+SSL_SESSION_print(), SSL_SESSION_print_fp() and SSL_SESSION_print_keylog return
+1 on success or 0 on error.
+
+=head1 SEE ALSO
+
+L<ssl(7)>
+
+=head1 COPYRIGHT
+
+Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (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

doc/man3/SSL_SESSION_set1_id.pod

@@ -2,22 +2,31 @@
 
 =head1 NAME
 
-SSL_SESSION_set1_id - set the SSL session ID
+SSL_SESSION_get_id,
+SSL_SESSION_set1_id
+- get and set the SSL session ID
 
 =head1 SYNOPSIS
 
  #include <openssl/ssl.h>
 
+ const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s,
+                                         unsigned int *len)
  int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid,
                          unsigned int sid_len);
 
 =head1 DESCRIPTION
 
+SSL_SESSION_get_id() returns a pointer to the internal session id value for the
+session B<s>. The length of the id in bytes is stored in B<*len>. The length may
+be 0. The caller should not free the returned pointer directly.
+
 SSL_SESSION_set1_id() sets the the session ID for the B<ssl> SSL/TLS session
 to B<sid> of length B<sid_len>.
 
 =head1 RETURN VALUES
 
+SSL_SESSION_get_id() returns a pointer to the session id value.
 SSL_SESSION_set1_id() returns 1 for success and 0 for failure, for example
 if the supplied session ID length exceeds B<SSL_MAX_SSL_SESSION_ID_LENGTH>.