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/*++
/* NAME
/* sasl_mech_filter 3
/* SUMMARY
/* Filter SASL mechanism names
/* SYNOPSIS
/* #include sasl_mech_filter.h
/*
/* const char *sasl_mech_filter(
/* STRING_LIST *filter,
/* const char *words)
/* DESCRIPTION
/* sasl_mech_filter() applies the specified filter to a list
/* of SASL mechanism names. The filter is case-insensitive,
/* but preserves the case of input words.
/*
/* Arguments:
/* .IP filter
/* Null pointer or filter specification. If this is a nulll
/* pointer, no filter will be applied.
/* .IP words
/* List of SASL authentication mechanisms (separated by blanks).
/* If the string is empty, the filter will not be applied.
/* DIAGNOSTICS
/* Fatal errors: memory allocation, table lookup error.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Original author:
/* Till Franke
/* SuSE Rhein/Main AG
/* 65760 Eschborn, Germany
/*
/* Adopted by:
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <string.h>
#ifdef STRCASECMP_IN_STRINGS_H
#include <strings.h>
#endif
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <stringops.h>
/* Global library. */
#include <sasl_mech_filter.h>
#ifdef USE_SASL_AUTH
/* sasl_mech_filter - filter a SASL mechanism list */
const char *sasl_mech_filter(STRING_LIST *filter,
const char *words)
{
const char myname[] = "sasl_mech_filter";
static VSTRING *buf;
char *mech_list;
char *save_mech;
char *mech;
/*
* NOOP if there is no filter, or if the mechanism list is empty.
*/
if (filter == 0 || *words == 0)
return (words);
if (buf == 0)
buf = vstring_alloc(10);
VSTRING_RESET(buf);
VSTRING_TERMINATE(buf);
save_mech = mech_list = mystrdup(words);
while ((mech = mystrtok(&mech_list, " \t")) != 0) {
if (string_list_match(filter, mech)) {
if (VSTRING_LEN(buf) > 0)
VSTRING_ADDCH(buf, ' ');
vstring_strcat(buf, mech);
if (msg_verbose)
msg_info("%s: keep SASL mechanism: '%s'", myname, mech);
} else if (filter->error) {
msg_fatal("%s: SASL mechanism filter failed for: '%s'",
myname, mech);
} else {
if (msg_verbose)
msg_info("%s: drop SASL mechanism: '%s'", myname, mech);
}
}
myfree(save_mech);
return (vstring_str(buf));
}
#endif
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