/** BEGIN COPYRIGHT BLOCK
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 *
 * License: GPL (version 3 or any later version).
 * See LICENSE for details.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

/* ces.c - caseexactstring syntax routines.  Implements support for:
 *     - IA5String
 *     - URI (DEPRECATED - This is non-standard and isn't used in the default schema.) */

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "syntax.h"

/* this is used in proposed schema, but there is no official
   OID yet - so for now, use our private MR OID namespace */
#define CASEEXACTIA5SUBSTRINGSMATCH_OID "2.16.840.1.113730.3.3.1"

static int ces_filter_ava(Slapi_PBlock *pb, struct berval *bvfilter, Slapi_Value **bvals, int ftype, Slapi_Value **retVal);
static int ces_filter_sub(Slapi_PBlock *pb, char *initial, char **any, char * final, Slapi_Value **bvals);
static int ces_values2keys(Slapi_PBlock *pb, Slapi_Value **val, Slapi_Value ***ivals, int ftype);
static int ces_assertion2keys_ava(Slapi_PBlock *pb, Slapi_Value *val, Slapi_Value ***ivals, int ftype);
static int ces_assertion2keys_sub(Slapi_PBlock *pb, char *initial, char **any, char * final, Slapi_Value ***ivals);
static int ces_compare(struct berval *v1, struct berval *v2);
static int ia5_validate(struct berval *val);
static void ces_normalize(
    Slapi_PBlock *pb,
    char *s,
    int trim_spaces,
    char **alt);

/* the first name is the official one from RFC 2252 */
static char *ia5_names[] = {"IA5String", "ces", "caseexactstring",
                            IA5STRING_SYNTAX_OID, 0};

/* the first name is the official one from RFC 2252 */
static char *uri_names[] = {"URI", "1.3.6.1.4.1.4401.1.1.1", 0};

static Slapi_PluginDesc ia5_pdesc = {"ces-syntax", VENDOR,
                                     DS_PACKAGE_VERSION, "caseExactString attribute syntax plugin"};

static Slapi_PluginDesc uri_pdesc = {"uri-syntax", VENDOR,
                                     DS_PACKAGE_VERSION, "uri attribute syntax plugin"};

static const char *caseExactIA5Match_names[] = {"caseExactIA5Match", "1.3.6.1.4.1.1466.109.114.1", NULL};
static const char *caseExactMatch_names[] = {"caseExactMatch", "2.5.13.5", NULL};
static const char *caseExactOrderingMatch_names[] = {"caseExactOrderingMatch", "2.5.13.6", NULL};
static const char *caseExactSubstringsMatch_names[] = {"caseExactSubstringsMatch", "2.5.13.7", NULL};
static const char *caseExactIA5SubstringsMatch_names[] = {"caseExactIA5SubstringsMatch", CASEEXACTIA5SUBSTRINGSMATCH_OID, NULL};

static char *dirStringCompat_syntaxes[] = {COUNTRYSTRING_SYNTAX_OID,
                                           PRINTABLESTRING_SYNTAX_OID, NULL};
static char *ia5String_syntaxes[] = {IA5STRING_SYNTAX_OID, NULL};
static char *caseExactSubstrings_syntaxes[] = {IA5STRING_SYNTAX_OID, /* allow IA5 to use cesubstrs e.g. krbPrincipalName */
                                               COUNTRYSTRING_SYNTAX_OID,
                                               DIRSTRING_SYNTAX_OID,
                                               PRINTABLESTRING_SYNTAX_OID, NULL};

/* for some reason vendorName and vendorVersion are dirstring but want
   to use EQUALITY caseExactIA5Match ???? RFC 3045
   also the old definition of automountInformation from 60autofs.ldif
   does the same thing */
static char *caseExactIA5Match_syntaxes[] = {DIRSTRING_SYNTAX_OID, NULL};

static struct mr_plugin_def mr_plugin_table[] = {
    {{"1.3.6.1.4.1.1466.109.114.1",
      NULL,
      "caseExactIA5Match",
      "The caseExactIA5Match rule compares an assertion value of the IA5 "
      "String syntax to an attribute value of a syntax (e.g., the IA5 String "
      "syntax) whose corresponding ASN.1 type is IA5String. "
      "The rule evaluates to TRUE if and only if the prepared attribute "
      "value character string and the prepared assertion value character "
      "string have the same number of characters and corresponding "
      "characters have the same code point. "
      "In preparing the attribute value and assertion value for comparison, "
      "characters are not case folded in the Map preparation step, and only "
      "Insignificant Space Handling is applied in the Insignificant "
      "Character Handling step.",
      IA5STRING_SYNTAX_OID,
      0,
      caseExactIA5Match_syntaxes}, /* matching rule desc */
     {
         "caseExactIA5Match-mr",
         VENDOR,
         DS_PACKAGE_VERSION,
         "caseExactIA5Match matching rule plugin"}, /* plugin desc */
     caseExactIA5Match_names,                       /* matching rule name/oid/aliases */
     NULL,
     NULL,
     ces_filter_ava,
     NULL,
     ces_values2keys,
     ces_assertion2keys_ava,
     NULL,
     ces_compare,
     ces_normalize},
    {{"2.5.13.5",
      NULL,
      "caseExactMatch",
      "The caseExactMatch rule compares an assertion value of the Directory "
      "String syntax to an attribute value of a syntax (e.g., the Directory "
      "String, Printable String, Country String, or Telephone Number syntax) "
      "whose corresponding ASN.1 type is DirectoryString or one of the "
      "alternative string types of DirectoryString, such as PrintableString "
      "(the other alternatives do not correspond to any syntax defined in "
      "this document). "
      "The rule evaluates to TRUE if and only if the prepared attribute "
      "value character string and the prepared assertion value character "
      "string have the same number of characters and corresponding "
      "characters have the same code point. "
      "In preparing the attribute value and assertion value for comparison, "
      "characters are not case folded in the Map preparation step, and only "
      "Insignificant Space Handling is applied in the Insignificant "
      "Character Handling step.",
      DIRSTRING_SYNTAX_OID,
      0,
      dirStringCompat_syntaxes}, /* matching rule desc */
     {
         "caseExactMatch-mr",
         VENDOR,
         DS_PACKAGE_VERSION,
         "caseExactMatch matching rule plugin"}, /* plugin desc */
     caseExactMatch_names,                       /* matching rule name/oid/aliases */
     NULL,
     NULL,
     ces_filter_ava,
     NULL,
     ces_values2keys,
     ces_assertion2keys_ava,
     NULL,
     ces_compare,
     ces_normalize},
    {{"2.5.13.6",
      NULL,
      "caseExactOrderingMatch",
      "The caseExactOrderingMatch rule compares an assertion value of the "
      "Directory String syntax to an attribute value of a syntax (e.g., the "
      "Directory String, Printable String, Country String, or Telephone "
      "Number syntax) whose corresponding ASN.1 type is DirectoryString or "
      "one of its alternative string types. "
      "The rule evaluates to TRUE if and only if, in the code point "
      "collation order, the prepared attribute value character string "
      "appears earlier than the prepared assertion value character string; "
      "i.e., the attribute value is \"less than\" the assertion value. "
      "In preparing the attribute value and assertion value for comparison, "
      "characters are not case folded in the Map preparation step, and only "
      "Insignificant Space Handling is applied in the Insignificant "
      "Character Handling step.",
      DIRSTRING_SYNTAX_OID,
      0,
      dirStringCompat_syntaxes}, /* matching rule desc */
     {
         "caseExactOrderingMatch-mr",
         VENDOR,
         DS_PACKAGE_VERSION,
         "caseExactOrderingMatch matching rule plugin"}, /* plugin desc */
     caseExactOrderingMatch_names,                       /* matching rule name/oid/aliases */
     NULL,
     NULL,
     ces_filter_ava,
     NULL,
     ces_values2keys,
     ces_assertion2keys_ava,
     NULL,
     ces_compare,
     ces_normalize},
    {{"2.5.13.7",
      NULL,
      "caseExactSubstringsMatch",
      "The caseExactSubstringsMatch rule compares an assertion value of the "
      "Substring Assertion syntax to an attribute value of a syntax (e.g., "
      "the Directory String, Printable String, Country String, or Telephone "
      "Number syntax) whose corresponding ASN.1 type is DirectoryString or "
      "one of its alternative string types. "
      "The rule evaluates to TRUE if and only if (1) the prepared substrings "
      "of the assertion value match disjoint portions of the prepared "
      "attribute value character string in the order of the substrings in "
      "the assertion value, (2) an <initial> substring, if present, matches "
      "the beginning of the prepared attribute value character string, and "
      "(3) a <final> substring, if present, matches the end of the prepared "
      "attribute value character string.  A prepared substring matches a "
      "portion of the prepared attribute value character string if "
      "corresponding characters have the same code point. "
      "In preparing the attribute value and assertion value substrings for "
      "comparison, characters are not case folded in the Map preparation "
      "step, and only Insignificant Space Handling is applied in the "
      "Insignificant Character Handling step.",
      "1.3.6.1.4.1.1466.115.121.1.58",
      0,
      caseExactSubstrings_syntaxes}, /* matching rule desc */
     {
         "caseExactSubstringsMatch-mr",
         VENDOR,
         DS_PACKAGE_VERSION,
         "caseExactSubstringsMatch matching rule plugin"}, /* plugin desc */
     caseExactSubstringsMatch_names,                       /* matching rule name/oid/aliases */
     NULL,
     NULL,
     NULL,
     ces_filter_sub,
     ces_values2keys,
     NULL,
     ces_assertion2keys_sub,
     ces_compare,
     ces_normalize},
    {{CASEEXACTIA5SUBSTRINGSMATCH_OID,
      NULL,
      "caseExactIA5SubstringsMatch",
      "The caseExactIA5SubstringsMatch rule compares an assertion value of the "
      "Substring Assertion syntax to an attribute value of a syntax (e.g., "
      "the IA5 syntax) whose corresponding ASN.1 type is IA5 String or "
      "one of its alternative string types. "
      "The rule evaluates to TRUE if and only if (1) the prepared substrings "
      "of the assertion value match disjoint portions of the prepared "
      "attribute value character string in the order of the substrings in "
      "the assertion value, (2) an <initial> substring, if present, matches "
      "the beginning of the prepared attribute value character string, and "
      "(3) a <final> substring, if present, matches the end of the prepared "
      "attribute value character string.  A prepared substring matches a "
      "portion of the prepared attribute value character string if "
      "corresponding characters have the same code point. "
      "In preparing the attribute value and assertion value substrings for "
      "comparison, characters are not case folded in the Map preparation "
      "step, and only Insignificant Space Handling is applied in the "
      "Insignificant Character Handling step.",
      "1.3.6.1.4.1.1466.115.121.1.58",
      0,
      ia5String_syntaxes}, /* matching rule desc */
     {
         "caseExactIA5SubstringsMatch-mr",
         VENDOR,
         DS_PACKAGE_VERSION,
         "caseExactIA5SubstringsMatch matching rule plugin"}, /* plugin desc */
     caseExactIA5SubstringsMatch_names,                       /* matching rule name/oid/aliases */
     NULL,
     NULL,
     NULL,
     ces_filter_sub,
     ces_values2keys,
     NULL,
     ces_assertion2keys_sub,
     ces_compare,
     ces_normalize}};

static size_t mr_plugin_table_size = sizeof(mr_plugin_table) / sizeof(mr_plugin_table[0]);

static int
matching_rule_plugin_init(Slapi_PBlock *pb)
{
    return syntax_matching_rule_plugin_init(pb, mr_plugin_table, mr_plugin_table_size);
}

static int
register_matching_rule_plugins(void)
{
    return syntax_register_matching_rule_plugins(mr_plugin_table, mr_plugin_table_size, matching_rule_plugin_init);
}

/*
 * register_ces_like_plugin():  register all items for a cis-like plugin.
 */
static int
register_ces_like_plugin(Slapi_PBlock *pb, Slapi_PluginDesc *pdescp, char **names, char *oid, void *validate_fn)
{
    int rc, flags;

    rc = slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION,
                          (void *)SLAPI_PLUGIN_VERSION_01);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DESCRIPTION,
                           (void *)pdescp);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_FILTER_AVA,
                           (void *)ces_filter_ava);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_FILTER_SUB,
                           (void *)ces_filter_sub);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_VALUES2KEYS,
                           (void *)ces_values2keys);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_ASSERTION2KEYS_AVA,
                           (void *)ces_assertion2keys_ava);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_ASSERTION2KEYS_SUB,
                           (void *)ces_assertion2keys_sub);
    flags = SLAPI_PLUGIN_SYNTAX_FLAG_ORDERING;
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_FLAGS,
                           (void *)&flags);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_NAMES,
                           (void *)names);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_OID,
                           (void *)oid);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_COMPARE,
                           (void *)ces_compare);
    if (validate_fn != NULL) {
        rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_VALIDATE,
                               (void *)validate_fn);
    }
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_NORMALIZE,
                           (void *)ces_normalize);

    return (rc);
}

int
ces_init(Slapi_PBlock *pb)
{
    int rc;

    slapi_log_err(SLAPI_LOG_PLUGIN, SYNTAX_PLUGIN_SUBSYSTEM, "=> ces_init\n");

    rc = register_ces_like_plugin(pb, &ia5_pdesc, ia5_names, IA5STRING_SYNTAX_OID, ia5_validate);
    rc |= register_matching_rule_plugins();

    slapi_log_err(SLAPI_LOG_PLUGIN, SYNTAX_PLUGIN_SUBSYSTEM, "<= ces_init %d\n", rc);
    return (rc);
}

int
uri_init(Slapi_PBlock *pb)
{
    int rc;

    slapi_log_err(SLAPI_LOG_PLUGIN, SYNTAX_PLUGIN_SUBSYSTEM, "=> uri_init\n");

    rc = register_ces_like_plugin(pb, &uri_pdesc, uri_names,
                                  "1.3.6.1.4.1.4401.1.1.1", NULL);

    slapi_log_err(SLAPI_LOG_PLUGIN, SYNTAX_PLUGIN_SUBSYSTEM, "<= uri_init %d\n", rc);
    return (rc);
}

static int
ces_filter_ava(
    Slapi_PBlock *pb,
    struct berval *bvfilter,
    Slapi_Value **bvals,
    int ftype,
    Slapi_Value **retVal)
{
    int filter_normalized = 0;
    int syntax = SYNTAX_CES;
    if (pb) {
        slapi_pblock_get(pb, SLAPI_PLUGIN_SYNTAX_FILTER_NORMALIZED,
                         &filter_normalized);
        if (filter_normalized) {
            syntax |= SYNTAX_NORM_FILT;
        }
    }
    return (string_filter_ava(bvfilter, bvals, syntax, ftype,
                              retVal));
}

static int
ces_filter_sub(
    Slapi_PBlock *pb,
    char *initial,
    char **any,
    char * final,
    Slapi_Value **bvals)
{
    return (string_filter_sub(pb, initial, any, final, bvals, SYNTAX_CES));
}

static int
ces_values2keys(
    Slapi_PBlock *pb,
    Slapi_Value **vals,
    Slapi_Value ***ivals,
    int ftype)
{
    return (string_values2keys(pb, vals, ivals, SYNTAX_CES, ftype));
}

static int
ces_assertion2keys_ava(
    Slapi_PBlock *pb,
    Slapi_Value *val,
    Slapi_Value ***ivals,
    int ftype)
{
    return (string_assertion2keys_ava(pb, val, ivals, SYNTAX_CES, ftype));
}

static int
ces_assertion2keys_sub(
    Slapi_PBlock *pb,
    char *initial,
    char **any,
    char * final,
    Slapi_Value ***ivals)
{
    return (string_assertion2keys_sub(pb, initial, any, final, ivals,
                                      SYNTAX_CES));
}

static int
ces_compare(
    struct berval *v1,
    struct berval *v2)
{
    return value_cmp(v1, v2, SYNTAX_CES, 3 /* Normalise both values */);
}

static int
ia5_validate(
    struct berval *val)
{
    int rc = 0; /* assume the value is valid */
    uint i = 0;

    if (val == NULL) {
        rc = 1;
        goto exit;
    }

    /* Per RFC 4517:
     *
     * IA5String = *(%x00-7F)
     */
    for (i = 0; i < val->bv_len; i++) {
        if (!IS_UTF1(val->bv_val[i])) {
            rc = 1;
            goto exit;
        }
    }

exit:
    return rc;
}

static void
ces_normalize(
    Slapi_PBlock *pb __attribute__((unused)),
    char *s,
    int trim_spaces,
    char **alt)
{
    value_normalize_ext(s, SYNTAX_CES, trim_spaces, alt);
    return;
}