Add test cases and docs for ASN1_STRING_TABLE_* functions

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3998)

1 files changed, 65 insertions, 0 deletions

diff --git a/doc/man3/ASN1_STRING_TABLE_add.pod b/doc/man3/ASN1_STRING_TABLE_add.pod
new file mode 100644
index 0000000000..e1786bf085
--- /dev/null
+++ b/doc/man3/ASN1_STRING_TABLE_add.pod
@@ -0,0 +1,65 @@
+=pod
+
+=head1 NAME
+
+ASN1_STRING_TABLE, ASN1_STRING_TABLE_add, ASN1_STRING_TABLE_get,
+ASN1_STRING_TABLE_cleanup - ASN1_STRING_TABLE manipulation functions
+
+=head1 SYNOPSIS
+
+ #include <openssl/asn1.h>
+
+ typedef struct asn1_string_table_st ASN1_STRING_TABLE;
+
+ int ASN1_STRING_TABLE_add(int nid, long minsize, long maxsize,
+                           unsigned long mask, unsigned long flags);
+ ASN1_STRING_TABLE * ASN1_STRING_TABLE_get(int nid);
+ void ASN1_STRING_TABLE_cleanup(void);
+
+=head1 DESCRIPTION
+
+=head2 Types
+
+B<ASN1_STRING_TABLE> is a table which holds string information
+(basically minimum size, maximum size, type and etc) for a NID object.
+
+=head2 Functions
+
+ASN1_STRING_TABLE_add() adds a new B<ASN1_STRING_TABLE> item into the
+local ASN1 string table based on the B<nid> along with other parameters.
+
+If the item is already in the table, fields of B<ASN1_STRING_TABLE> are
+updated (depending on the values of those parameters, e.g., B<minsize>
+and B<maxsize> >= 0, B<mask> and B<flags> != 0). If the B<nid> is standard,
+a copy of the standard B<ASN1_STRING_TABLE> is created and updated with
+other parameters.
+
+ASN1_STRING_TABLE_get() searches for an B<ASN1_STRING_TABLE> item based
+on B<nid>. It will search the local table first, then the standard one.
+
+ASN1_STRING_TABLE_cleanup() frees all B<ASN1_STRING_TABLE> items added
+by ASN1_STRING_TABLE_add().
+
+=head1 RETURN VALUES
+
+ASN1_STRING_TABLE_add() returns 1 on success, 0 if an error occurred.
+
+ASN1_STRING_TABLE_get() returns a valid B<ASN1_STRING_TABLE> structure
+or B<NULL> if nothing is found.
+
+ASN1_STRING_TABLE_cleanup() does not return a value.
+
+=head1 SEE ALSO
+
+L<ERR_get_error(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