Document "get/set-app-data" macros.

Documenting the macros removes 14 undocumented items.
Merged three separate manpages into one.
Rename the DRBG CRYPTO_EX define into RAND_DRBG, but keep the old one
for API compatibility.

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10216)

5 files changed, 33 insertions, 175 deletions

diff --git a/doc/man3/BIO_get_ex_new_index.pod b/doc/man3/BIO_get_ex_new_index.pod
index 60f49f7e30..0bacb2e0cb 100644
--- a/doc/man3/BIO_get_ex_new_index.pod
+++ b/doc/man3/BIO_get_ex_new_index.pod
@@ -3,16 +3,27 @@
 =head1 NAME
 
 BIO_get_ex_new_index, BIO_set_ex_data, BIO_get_ex_data,
-ENGINE_get_ex_new_index, ENGINE_set_ex_data, ENGINE_get_ex_data,
-UI_get_ex_new_index, UI_set_ex_data, UI_get_ex_data,
-X509_get_ex_new_index, X509_set_ex_data, X509_get_ex_data,
-X509_STORE_get_ex_new_index, X509_STORE_set_ex_data, X509_STORE_get_ex_data,
-X509_STORE_CTX_get_ex_new_index, X509_STORE_CTX_set_ex_data, X509_STORE_CTX_get_ex_data,
+BIO_set_app_data, BIO_get_app_data,
 DH_get_ex_new_index, DH_set_ex_data, DH_get_ex_data,
 DSA_get_ex_new_index, DSA_set_ex_data, DSA_get_ex_data,
 ECDH_get_ex_new_index, ECDH_set_ex_data, ECDH_get_ex_data,
 EC_KEY_get_ex_new_index, EC_KEY_set_ex_data, EC_KEY_get_ex_data,
-RSA_get_ex_new_index, RSA_set_ex_data, RSA_get_ex_data
+ENGINE_get_ex_new_index, ENGINE_set_ex_data, ENGINE_get_ex_data,
+RAND_DRBG_set_ex_data, RAND_DRBG_get_ex_data, RAND_DRBG_get_ex_new_index,
+RSA_get_ex_new_index, RSA_set_ex_data, RSA_get_ex_data,
+RSA_set_app_data, RSA_get_app_data,
+SSL_get_ex_new_index, SSL_set_ex_data, SSL_get_ex_data,
+SSL_set_app_data, SSL_get_app_data,
+SSL_CTX_get_ex_new_index, SSL_CTX_set_ex_data, SSL_CTX_get_ex_data,
+SSL_CTX_set_app_data, SSL_CTX_get_app_data,
+SSL_SESSION_get_ex_new_index, SSL_SESSION_set_ex_data, SSL_SESSION_get_ex_data,
+SSL_SESSION_set_app_data, SSL_SESSION_get_app_data,
+UI_get_ex_new_index, UI_set_ex_data, UI_get_ex_data,
+UI_set_app_data, UI_get_app_data,
+X509_STORE_CTX_get_ex_new_index, X509_STORE_CTX_set_ex_data, X509_STORE_CTX_get_ex_data,
+X509_STORE_CTX_set_app_data, X509_STORE_CTX_get_app_data,
+X509_STORE_get_ex_new_index, X509_STORE_set_ex_data, X509_STORE_get_ex_data,
+X509_get_ex_new_index, X509_set_ex_data, X509_get_ex_data
 - application-specific data
 
 =head1 SYNOPSIS
@@ -30,6 +41,9 @@ RSA_get_ex_new_index, RSA_set_ex_data, RSA_get_ex_data
 
  void *TYPE_get_ex_data(TYPE *d, int idx);
 
+ #define TYPE_set_app_data(TYPE *d, void *arg)
+ #define TYPE_get_app_data(TYPE *d)
+
 =head1 DESCRIPTION
 
 In the description here, I<TYPE> is used a placeholder
@@ -48,6 +62,16 @@ an offset into the opaque exdata part of the TYPE object.
 TYPE_get_ex_data() is a function that calls CRYPTO_get_ex_data() with
 an offset into the opaque exdata part of the TYPE object.
 
+For compatibility with previous releases, the exdata index of zero is
+reserved for "application data." There are two convenience functions for
+this.
+TYPE_set_app_data() is a macro that invokes TYPE_set_ex_data() with
+B<idx> set to zero.
+TYPE_get_app_data() is a macro that invokes TYPE_get_ex_data() with
+B<idx> set to zero.
+Note that these functions are not defined for the B<RAND_DRBG> type because
+there are no backward compatibility concerns.
+
 =head1 RETURN VALUES
 
 TYPE_get_new_ex_index() returns a new index on success or -1 on error.
diff --git a/doc/man3/CRYPTO_get_ex_new_index.pod b/doc/man3/CRYPTO_get_ex_new_index.pod
index b0321b0933..d8cecccdb1 100644
--- a/doc/man3/CRYPTO_get_ex_new_index.pod
+++ b/doc/man3/CRYPTO_get_ex_new_index.pod
@@ -44,13 +44,12 @@ Several OpenSSL structures can have application-specific data attached to them,
 known as "exdata."
 The specific structures are:
 
-    APP
     BIO
     DH
-    DRBG
     DSA
     EC_KEY
     ENGINE
+    RAND_DRBG
     RSA
     SSL
     SSL_CTX
@@ -61,6 +60,8 @@ The specific structures are:
     X509_STORE
     X509_STORE_CTX
 
+In addition, the B<APP> name is reserved for use by application code.
+
 Each is identified by an B<CRYPTO_EX_INDEX_xxx> define in the B<crypto.h>
 header file.  In addition, B<CRYPTO_EX_INDEX_APP> is reserved for
 applications to use this facility for their own structures.
diff --git a/doc/man3/RAND_DRBG_set_ex_data.pod b/doc/man3/RAND_DRBG_set_ex_data.pod
deleted file mode 100644
index 3f2bffa282..0000000000
--- a/doc/man3/RAND_DRBG_set_ex_data.pod
+++ /dev/null
@@ -1,68 +0,0 @@
-=pod
-
-=head1 NAME
-
-RAND_DRBG_set_ex_data,
-RAND_DRBG_get_ex_data,
-RAND_DRBG_get_ex_new_index
-- store and retrieve extra data from the DRBG instance
-
-=head1 SYNOPSIS
-
- #include <openssl/rand_drbg.h>
-
- int RAND_DRBG_set_ex_data(RAND_DRBG *drbg, int idx, void *data);
-
- void *RAND_DRBG_get_ex_data(const RAND_DRBG *drbg, int idx);
-
- int RAND_DRBG_get_ex_new_index(long argl, void *argp,
-                                CRYPTO_EX_new *new_func,
-                                CRYPTO_EX_dup *dup_func,
-                                CRYPTO_EX_free *free_func);
-
-
-
-=head1 DESCRIPTION
-
-RAND_DRBG_set_ex_data() enables an application to store arbitrary application
-specific data B<data> in a RAND_DRBG instance B<drbg>. The index B<idx> should
-be a value previously returned from a call to RAND_DRBG_get_ex_new_index().
-
-RAND_DRBG_get_ex_data() retrieves application specific data previously stored
-in an RAND_DRBG instance B<drbg>. The B<idx> value should be the same as that
-used when originally storing the data.
-
-For more detailed information see L<CRYPTO_get_ex_data(3)> and
-L<CRYPTO_set_ex_data(3)> which implement these functions and
-L<CRYPTO_get_ex_new_index(3)> for generating a unique index.
-
-=head1 RETURN VALUES
-
-RAND_DRBG_set_ex_data() returns 1 for success or 0 for failure.
-
-RAND_DRBG_get_ex_data() returns the previously stored value or NULL on
-failure. NULL may also be a valid value.
-
-
-=head1 NOTES
-
-RAND_DRBG_get_ex_new_index(...) is implemented as a macro and equivalent to
-CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DRBG,...).
-
-=head1 SEE ALSO
-
-L<CRYPTO_get_ex_data(3)>,
-L<CRYPTO_set_ex_data(3)>,
-L<CRYPTO_get_ex_new_index(3)>,
-L<RAND_DRBG(7)>
-
-=head1 COPYRIGHT
-
-Copyright 2017-2018 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
diff --git a/doc/man3/SSL_CTX_set_ex_data.pod b/doc/man3/SSL_CTX_set_ex_data.pod
deleted file mode 100644
index 51997c29b1..0000000000
--- a/doc/man3/SSL_CTX_set_ex_data.pod
+++ /dev/null
@@ -1,52 +0,0 @@
-=pod
-
-=head1 NAME
-
-SSL_CTX_get_ex_data, SSL_CTX_set_ex_data,
-SSL_get_ex_data, SSL_set_ex_data
-- Store and retrieve extra data from the SSL_CTX, SSL or SSL_SESSION
-
-=head1 SYNOPSIS
-
- #include <openssl/ssl.h>
-
- void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx);
-
- int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg);
-
- void *SSL_get_ex_data(const SSL *s, int idx);
-
- int SSL_set_ex_data(SSL *s, int idx, void *arg);
-
-=head1 DESCRIPTION
-
-SSL*_set_ex_data() functions can be used to store arbitrary user data into the
-B<SSL_CTX>, or B<SSL> object. The user must supply a unique index
-which they can subsequently use to retrieve the data using SSL*_get_ex_data().
-
-For more detailed information see L<CRYPTO_get_ex_data(3)> and
-L<CRYPTO_set_ex_data(3)> which implement these functions and
-L<CRYPTO_get_ex_new_index(3)> for generating a unique index.
-
-=head1 RETURN VALUES
-
-The SSL*_set_ex_data() functions return 1 if the item is successfully stored
-and 0 if it is not.
-The SSL*_get_ex_data() functions return the ex_data pointer if successful,
-otherwise NULL.
-
-=head1 SEE ALSO
-
-L<CRYPTO_get_ex_data(3)>, L<CRYPTO_set_ex_data(3)>,
-L<CRYPTO_get_ex_new_index(3)>
-
-=head1 COPYRIGHT
-
-Copyright 2017 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
diff --git a/doc/man3/SSL_SESSION_get_ex_data.pod b/doc/man3/SSL_SESSION_get_ex_data.pod
deleted file mode 100644
index 1cda811b5e..0000000000
--- a/doc/man3/SSL_SESSION_get_ex_data.pod
+++ /dev/null
@@ -1,47 +0,0 @@
-=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 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