New functions for PKCS8 attributes management - documentation

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/10900)

doc/man3/PKCS8_pkey_add1_attr.pod

@@ -0,0 +1,54 @@
+=pod
+
+=head1 NAME
+
+PKCS8_pkey_get0_attrs, PKCS8_pkey_add1_attr, PKCS8_pkey_add1_attr_by_NID, PKCS8_pkey_add1_attr_by_OBJ - PKCS8 attribute functions
+
+=head1 SYNOPSIS
+
+ #include <openssl/x509.h>
+
+ const STACK_OF(X509_ATTRIBUTE) *
+ PKCS8_pkey_get0_attrs(const PKCS8_PRIV_KEY_INFO *p8);
+ int PKCS8_pkey_add1_attr(PKCS8_PRIV_KEY_INFO *p8, X509_ATTRIBUTE *attr);
+ int PKCS8_pkey_add1_attr_by_NID(PKCS8_PRIV_KEY_INFO *p8, int nid, int type,
+                                 const unsigned char *bytes, int len);
+ int PKCS8_pkey_add1_attr_by_OBJ(PKCS8_PRIV_KEY_INFO *p8, const ASN1_OBJECT *obj,
+                                int type, const unsigned char *bytes, int len);
+
+=head1 DESCRIPTION
+
+PKCS8_pkey_get0_attrs() returns a const STACK of X509_ATTRIBUTE present in
+the passed const PKCS8_PRIV_KEY_INFO structure B<p8>.
+
+PKCS8_pkey_add1_attr() adds a constructed X509_ATTRIBUTE B<attr> to the
+existing PKCS8_PRIV_KEY_INFO structure B<p8>.
+
+PKCS8_pkey_add1_attr_by_NID() and PKCS8_pkey_add1_attr_by_OBJ() construct a new
+X509_ATTRIBUTE from the passed arguments and add it to the existing
+PKCS8_PRIV_KEY_INFO structure B<p8>.
+
+=head1 RETURN VALUES
+
+PKCS8_pkey_add1_attr(), PKCS8_pkey_add1_attr_by_NID(), and
+PKCS8_pkey_add1_attr_by_OBJ() return 1 for success and 0 for failure.
+
+=head1 NOTES
+
+STACK of X509_ATTRIBUTE is present in many X509-related structures and some of
+them have the corresponding set of similar functions.
+
+=head1 SEE ALSO
+
+L<crypto(7)>
+
+=head1 COPYRIGHT
+
+Copyright 2020 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

util/missingcrypto.txt

@@ -876,9 +876,7 @@ PKCS8_add_keyusage(3)
 PKCS8_decrypt(3)
 PKCS8_encrypt(3)
 PKCS8_get_attr(3)
-PKCS8_pkey_add1_attr_by_NID(3)
 PKCS8_pkey_get0(3)
-PKCS8_pkey_get0_attrs(3)
 PKCS8_pkey_set0(3)
 PKCS8_set0_pbe(3)
 PKEY_USAGE_PERIOD_it(3)