Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ldapd/syntax.c	Lines:	2	83	2.4 %
Date:	2017-11-13	Branches:	0	176	0.0 %


/*	$OpenBSD: syntax.c,v 1.5 2017/05/28 15:48:49 jmatthew Exp $ */

/*
 * Copyright (c) 2010 Martin Hedenfalk <martin@bzero.se>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/queue.h>
#include <sys/tree.h>

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "schema.h"
#include "uuid.h"

#define SYNTAX_DECL(TYPE) \
	static int syntax_is_##TYPE(struct schema *schema, char *value, size_t len)

SYNTAX_DECL(bit_string);
SYNTAX_DECL(boolean);
SYNTAX_DECL(country);
SYNTAX_DECL(directory_string);
SYNTAX_DECL(dn);
SYNTAX_DECL(gentime);
SYNTAX_DECL(ia5_string);
SYNTAX_DECL(integer);
SYNTAX_DECL(numeric_string);
SYNTAX_DECL(octet_string);
SYNTAX_DECL(oid);
SYNTAX_DECL(printable_string);
SYNTAX_DECL(utctime);
SYNTAX_DECL(uuid);

static struct syntax syntaxes[] = {
	/*
	 * Keep these sorted.
	 */
	{ "1.3.6.1.1.1.0.0", "NIS netgroup triple", NULL },
	{ "1.3.6.1.1.1.0.1", "Boot parameter", NULL },
	{ "1.3.6.1.1.16.1", "UUID", syntax_is_uuid },
	{ "1.3.6.1.4.1.1466.115.121.1.11", "Country String", syntax_is_country },
	{ "1.3.6.1.4.1.1466.115.121.1.12", "DN", syntax_is_dn },
	{ "1.3.6.1.4.1.1466.115.121.1.14", "Delivery Method", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.15", "Directory String", syntax_is_directory_string },
	{ "1.3.6.1.4.1.1466.115.121.1.16", "DIT Content Rule Description", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.17", "DIT Structure Rule Description", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.21", "Enhanced Guide", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.22", "Facsimile Telephone Number", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.23", "Fax", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.24", "Generalized Time", syntax_is_gentime },
	{ "1.3.6.1.4.1.1466.115.121.1.25", "Guide", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.26", "IA5 String", syntax_is_ia5_string },
	{ "1.3.6.1.4.1.1466.115.121.1.27", "INTEGER", syntax_is_integer },
	{ "1.3.6.1.4.1.1466.115.121.1.28", "JPEG", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.3",  "Attribute Type Description", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.30", "Matching Rule Description", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.31", "Matching Rule Use Description", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.34", "Name And Optional UID", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.35", "Name Form Description", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.36", "Numeric String", syntax_is_numeric_string },
	{ "1.3.6.1.4.1.1466.115.121.1.37", "Object Class Description", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.38", "OID", syntax_is_oid },
	{ "1.3.6.1.4.1.1466.115.121.1.39", "Other Mailbox", syntax_is_ia5_string },
	{ "1.3.6.1.4.1.1466.115.121.1.40", "Octet String", syntax_is_octet_string },
	{ "1.3.6.1.4.1.1466.115.121.1.41", "Postal Address", syntax_is_directory_string },
	{ "1.3.6.1.4.1.1466.115.121.1.44", "Printable String", syntax_is_printable_string },
	{ "1.3.6.1.4.1.1466.115.121.1.45", "Subtree Specification", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.5",  "Binary", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.50", "Telephone Number", syntax_is_printable_string },
	{ "1.3.6.1.4.1.1466.115.121.1.51", "Teletex Terminal Identifier", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.52", "Telex Number", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.53", "UTC Time", syntax_is_utctime },
	{ "1.3.6.1.4.1.1466.115.121.1.54", "LDAP Syntax Description", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.58", "Substring Assertion", NULL },
	{ "1.3.6.1.4.1.1466.115.121.1.6",  "Bit String", syntax_is_bit_string },
	{ "1.3.6.1.4.1.1466.115.121.1.7",  "Boolean", syntax_is_boolean },
	{ "1.3.6.1.4.1.1466.115.121.1.8",  "Certificate", NULL },

};

static int
syntax_cmp(const void *k, const void *e)
{
	return (strcmp(k, ((const struct syntax *)e)->oid));
}

const struct syntax *
syntax_lookup(const char *oid)
{
	return bsearch(oid, syntaxes, sizeof(syntaxes)/sizeof(syntaxes[0]),
	    sizeof(syntaxes[0]), syntax_cmp);
}

/*
 * A value of the Octet String syntax is a sequence of zero, one, or
 * more arbitrary octets.
 */
static int
syntax_is_octet_string(struct schema *schema, char *value, size_t len)
{
	return 1;
}

/*
 * A string of one or more arbitrary UTF-8 characters.
 */
static int
syntax_is_directory_string(struct schema *schema, char *value, size_t len)
{
	/* FIXME: validate UTF-8 characters. */
	return len >= 1 && *value != '\0';
}

/*
 * A value of the Printable String syntax is a string of one or more
 * latin alphabetic, numeric, and selected punctuation characters as
 * specified by the <PrintableCharacter> rule in Section 3.2.
 *
 *    PrintableCharacter = ALPHA / DIGIT / SQUOTE / LPAREN / RPAREN /
 *                         PLUS / COMMA / HYPHEN / DOT / EQUALS /
 *                         SLASH / COLON / QUESTION / SPACE
 */
static int
syntax_is_printable_string(struct schema *schema, char *value, size_t len)
{
	static char	*special = "'()+,-.=/:? ";
	char		*p;

	for (p = value; len > 0 && *p != '\0'; p++, len--) {
		if (!isalnum((unsigned char)*p) && strchr(special, *p) == NULL)
			return 0;
	}

	return (p != value);
}

/*
 * A value of the IA5 String syntax is a string of zero, one, or more
 * characters from International Alphabet 5 (IA5).
 *   IA5String          = *(%x00-7F)
 */
static int
syntax_is_ia5_string(struct schema *schema, char *value, size_t len)
{
	char		*p;

	for (p = value; *p != '\0'; p++) {
		if ((unsigned char)*p > 0x7F)
			return 0;
	}

	return 1;
}

/*
 * A value of the Integer syntax is a whole number of unlimited magnitude.
 *   Integer = ( HYPHEN LDIGIT *DIGIT ) / number
 *   number  = DIGIT / ( LDIGIT 1*DIGIT )
 */
static int
syntax_is_integer(struct schema *schema, char *value, size_t len)
{
	if (*value == '-')
		value++;
	if (*value == '0')
		return value[1] == '\0';
	for (value++; *value != '\0'; value++)
		if (!isdigit((unsigned char)*value))
			return 0;
	return 1;
}

static int
syntax_is_dn(struct schema *schema, char *value, size_t len)
{
	if (!syntax_is_directory_string(schema, value, len))
		return 0;

	/* FIXME: DN syntax not implemented */

	return 1;
}

static int
syntax_is_oid(struct schema *schema, char *value, size_t len)
{
	char	*symoid = NULL;

	if (len == 0 || *value == '\0')
		return 0;
	if (is_oidstr(value))
		return 1;

	/*
	 * Check for a symbolic OID: object class, attribute type or symoid.
	 */
	if (lookup_object_by_name(schema, value) != NULL ||
	    lookup_attribute_by_name(schema, value) != NULL ||
	    (symoid = lookup_symbolic_oid(schema, value)) != NULL) {
		free(symoid);
		return 1;
	}

	return 0;
}

static int
syntax_is_uuid(struct schema *schema, char *value, size_t len)
{
	int	 i;

	if (len != 36)
		return 0;

#define IS_XDIGITS(n, c)				\
	do {						\
		for (i = 0; i < (n); i++)		\
			if (!isxdigit(*value++))	\
				return 0;		\
		if (*value++ != (c))			\
			return 0;			\
	} while(0)

	IS_XDIGITS(8, '-');
	IS_XDIGITS(4, '-');
	IS_XDIGITS(4, '-');
	IS_XDIGITS(4, '-');
	IS_XDIGITS(12, '\0');

	return 1;
}

/*
 * NumericString = 1*(DIGIT / SPACE)
 */
static int
syntax_is_numeric_string(struct schema *schema, char *value, size_t len)
{
	char	*p;

	for (p = value; *p != '\0'; p++)
		if (!isdigit((unsigned char)*p) || *p != ' ')
			return 0;

	return p != value;
}

static int
syntax_is_time(struct schema *schema, char *value, size_t len, int gen)
{
	int	 n;
	char	*p = value;

#define CHECK_RANGE(min, max) \
	do {						\
		if (!isdigit((unsigned char)p[0]) ||	\
		    !isdigit((unsigned char)p[1]))	\
			return 0;			\
		n = (p[0] - '0') * 10 + (p[1] - '0');	\
		if (n < min || n > max)			\
			return 0;			\
		p += 2;					\
	} while (0)

	if (gen)
		CHECK_RANGE(0, 99);		/* century */
	CHECK_RANGE(0, 99);			/* year */
	CHECK_RANGE(1, 12);			/* month */
	CHECK_RANGE(1, 31);			/* day */
	/* FIXME: should check number of days in month */
	CHECK_RANGE(0, 23);			/* hour */

	if (!gen || isdigit((unsigned char)*p)) {
		CHECK_RANGE(0, 59);		/* minute */
		if (isdigit((unsigned char)*p))
			CHECK_RANGE(0, 59+gen);	/* second or leap-second */
		if (!gen && *p == '\0')
			return 1;
	}
						/* fraction */
	if (!gen && ((*p == ',' || *p == '.') &&
	    !isdigit((unsigned char)*++p)))
		return 0;

	if (*p == '-' || *p == '+') {
		++p;
		CHECK_RANGE(0, 23);		/* hour */
		if (!gen || isdigit((unsigned char)*p))
			CHECK_RANGE(0, 59);	/* minute */
	} else if (*p++ != 'Z')
		return 0;

	return *p == '\0';
}

static int
syntax_is_gentime(struct schema *schema, char *value, size_t len)
{
	return syntax_is_time(schema, value, len, 1);
}

static int
syntax_is_utctime(struct schema *schema, char *value, size_t len)
{
	return syntax_is_time(schema, value, len, 0);
}

static int
syntax_is_country(struct schema *schema, char *value, size_t len)
{
	if (len != 2)
		return 0;
	return syntax_is_printable_string(schema, value, len);
}

static int
syntax_is_bit_string(struct schema *schema, char *value, size_t len)
{
	if (*value++ != '\'')
		return 0;

	for (; *value != '\0'; value++) {
		if (*value == '\'')
			break;
		if (*value != '0' && *value != '1')
			return 0;
	}

	if (++*value != 'B')
		return 0;

	return *value == '\0';
}

static int
syntax_is_boolean(struct schema *schema, char *value, size_t len)
{
	return strcmp(value, "TRUE") == 0 || strcmp(value, "FALSE") == 0;
}



Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: syntax.c,v 1.5 2017/05/28 15:48:49 jmatthew Exp $ */
2
3			/*
4			* Copyright (c) 2010 Martin Hedenfalk <martin@bzero.se>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20			#include <sys/queue.h>
21			#include <sys/tree.h>
22
23			#include <ctype.h>
24			#include <stdio.h>
25			#include <stdlib.h>
26			#include <string.h>
27
28			#include "schema.h"
29			#include "uuid.h"
30
31			#define SYNTAX_DECL(TYPE) \
32			static int syntax_is_##TYPE(struct schema schema, char value, size_t len)
33
34			SYNTAX_DECL(bit_string);
35			SYNTAX_DECL(boolean);
36			SYNTAX_DECL(country);
37			SYNTAX_DECL(directory_string);
38			SYNTAX_DECL(dn);
39			SYNTAX_DECL(gentime);
40			SYNTAX_DECL(ia5_string);
41			SYNTAX_DECL(integer);
42			SYNTAX_DECL(numeric_string);
43			SYNTAX_DECL(octet_string);
44			SYNTAX_DECL(oid);
45			SYNTAX_DECL(printable_string);
46			SYNTAX_DECL(utctime);
47			SYNTAX_DECL(uuid);
48
49			static struct syntax syntaxes[] = {
50			/*
51			* Keep these sorted.
52			*/
53			{ "1.3.6.1.1.1.0.0", "NIS netgroup triple", NULL },
54			{ "1.3.6.1.1.1.0.1", "Boot parameter", NULL },
55			{ "1.3.6.1.1.16.1", "UUID", syntax_is_uuid },
56			{ "1.3.6.1.4.1.1466.115.121.1.11", "Country String", syntax_is_country },
57			{ "1.3.6.1.4.1.1466.115.121.1.12", "DN", syntax_is_dn },
58			{ "1.3.6.1.4.1.1466.115.121.1.14", "Delivery Method", NULL },
59			{ "1.3.6.1.4.1.1466.115.121.1.15", "Directory String", syntax_is_directory_string },
60			{ "1.3.6.1.4.1.1466.115.121.1.16", "DIT Content Rule Description", NULL },
61			{ "1.3.6.1.4.1.1466.115.121.1.17", "DIT Structure Rule Description", NULL },
62			{ "1.3.6.1.4.1.1466.115.121.1.21", "Enhanced Guide", NULL },
63			{ "1.3.6.1.4.1.1466.115.121.1.22", "Facsimile Telephone Number", NULL },
64			{ "1.3.6.1.4.1.1466.115.121.1.23", "Fax", NULL },
65			{ "1.3.6.1.4.1.1466.115.121.1.24", "Generalized Time", syntax_is_gentime },
66			{ "1.3.6.1.4.1.1466.115.121.1.25", "Guide", NULL },
67			{ "1.3.6.1.4.1.1466.115.121.1.26", "IA5 String", syntax_is_ia5_string },
68			{ "1.3.6.1.4.1.1466.115.121.1.27", "INTEGER", syntax_is_integer },
69			{ "1.3.6.1.4.1.1466.115.121.1.28", "JPEG", NULL },
70			{ "1.3.6.1.4.1.1466.115.121.1.3", "Attribute Type Description", NULL },
71			{ "1.3.6.1.4.1.1466.115.121.1.30", "Matching Rule Description", NULL },
72			{ "1.3.6.1.4.1.1466.115.121.1.31", "Matching Rule Use Description", NULL },
73			{ "1.3.6.1.4.1.1466.115.121.1.34", "Name And Optional UID", NULL },
74			{ "1.3.6.1.4.1.1466.115.121.1.35", "Name Form Description", NULL },
75			{ "1.3.6.1.4.1.1466.115.121.1.36", "Numeric String", syntax_is_numeric_string },
76			{ "1.3.6.1.4.1.1466.115.121.1.37", "Object Class Description", NULL },
77			{ "1.3.6.1.4.1.1466.115.121.1.38", "OID", syntax_is_oid },
78			{ "1.3.6.1.4.1.1466.115.121.1.39", "Other Mailbox", syntax_is_ia5_string },
79			{ "1.3.6.1.4.1.1466.115.121.1.40", "Octet String", syntax_is_octet_string },
80			{ "1.3.6.1.4.1.1466.115.121.1.41", "Postal Address", syntax_is_directory_string },
81			{ "1.3.6.1.4.1.1466.115.121.1.44", "Printable String", syntax_is_printable_string },
82			{ "1.3.6.1.4.1.1466.115.121.1.45", "Subtree Specification", NULL },
83			{ "1.3.6.1.4.1.1466.115.121.1.5", "Binary", NULL },
84			{ "1.3.6.1.4.1.1466.115.121.1.50", "Telephone Number", syntax_is_printable_string },
85			{ "1.3.6.1.4.1.1466.115.121.1.51", "Teletex Terminal Identifier", NULL },
86			{ "1.3.6.1.4.1.1466.115.121.1.52", "Telex Number", NULL },
87			{ "1.3.6.1.4.1.1466.115.121.1.53", "UTC Time", syntax_is_utctime },
88			{ "1.3.6.1.4.1.1466.115.121.1.54", "LDAP Syntax Description", NULL },
89			{ "1.3.6.1.4.1.1466.115.121.1.58", "Substring Assertion", NULL },
90			{ "1.3.6.1.4.1.1466.115.121.1.6", "Bit String", syntax_is_bit_string },
91			{ "1.3.6.1.4.1.1466.115.121.1.7", "Boolean", syntax_is_boolean },
92			{ "1.3.6.1.4.1.1466.115.121.1.8", "Certificate", NULL },
93
94			};
95
96			static int
97			syntax_cmp(const void k, const void e)
98			{
99		37440	return (strcmp(k, ((const struct syntax *)e)->oid));
100			}
101
102			const struct syntax *
103			syntax_lookup(const char *oid)
104			{
105		7616	return bsearch(oid, syntaxes, sizeof(syntaxes)/sizeof(syntaxes[0]),
106			sizeof(syntaxes[0]), syntax_cmp);
107			}
108
109			/*
110			* A value of the Octet String syntax is a sequence of zero, one, or
111			* more arbitrary octets.
112			*/
113			static int
114			syntax_is_octet_string(struct schema schema, char value, size_t len)
115			{
116			return 1;
117			}
118
119			/*
120			* A string of one or more arbitrary UTF-8 characters.
121			*/
122			static int
123			syntax_is_directory_string(struct schema schema, char value, size_t len)
124			{
125			/* FIXME: validate UTF-8 characters. */
126			return len >= 1 && *value != '\0';
127			}
128
129			/*
130			* A value of the Printable String syntax is a string of one or more
131			* latin alphabetic, numeric, and selected punctuation characters as
132			* specified by the <PrintableCharacter> rule in Section 3.2.
133			*
134			* PrintableCharacter = ALPHA / DIGIT / SQUOTE / LPAREN / RPAREN /
135			* PLUS / COMMA / HYPHEN / DOT / EQUALS /
136			* SLASH / COLON / QUESTION / SPACE
137			*/
138			static int
139			syntax_is_printable_string(struct schema schema, char value, size_t len)
140			{
141			static char *special = "'()+,-.=/:? ";
142			char *p;
143
144			for (p = value; len > 0 && *p != '\0'; p++, len--) {
145			if (!isalnum((unsigned char)p) && strchr(special, p) == NULL)
146			return 0;
147			}
148
149			return (p != value);
150			}
151
152			/*
153			* A value of the IA5 String syntax is a string of zero, one, or more
154			* characters from International Alphabet 5 (IA5).
155			* IA5String = *(%x00-7F)
156			*/
157			static int
158			syntax_is_ia5_string(struct schema schema, char value, size_t len)
159			{
160			char *p;
161
162			for (p = value; *p != '\0'; p++) {
163			if ((unsigned char)*p > 0x7F)
164			return 0;
165			}
166
167			return 1;
168			}
169
170			/*
171			* A value of the Integer syntax is a whole number of unlimited magnitude.
172			* Integer = ( HYPHEN LDIGIT *DIGIT ) / number
173			* number = DIGIT / ( LDIGIT 1*DIGIT )
174			*/
175			static int
176			syntax_is_integer(struct schema schema, char value, size_t len)
177			{
178			if (*value == '-')
179			value++;
180			if (*value == '0')
181			return value[1] == '\0';
182			for (value++; *value != '\0'; value++)
183			if (!isdigit((unsigned char)*value))
184			return 0;
185			return 1;
186			}
187
188			static int
189			syntax_is_dn(struct schema schema, char value, size_t len)
190			{
191			if (!syntax_is_directory_string(schema, value, len))
192			return 0;
193
194			/* FIXME: DN syntax not implemented */
195
196			return 1;
197			}
198
199			static int
200			syntax_is_oid(struct schema schema, char value, size_t len)
201			{
202			char *symoid = NULL;
203
204			if (len == 0 \|\| *value == '\0')
205			return 0;
206			if (is_oidstr(value))
207			return 1;
208
209			/*
210			* Check for a symbolic OID: object class, attribute type or symoid.
211			*/
212			if (lookup_object_by_name(schema, value) != NULL \|\|
213			lookup_attribute_by_name(schema, value) != NULL \|\|
214			(symoid = lookup_symbolic_oid(schema, value)) != NULL) {
215			free(symoid);
216			return 1;
217			}
218
219			return 0;
220			}
221
222			static int
223			syntax_is_uuid(struct schema schema, char value, size_t len)
224			{
225			int i;
226
227			if (len != 36)
228			return 0;
229
230			#define IS_XDIGITS(n, c) \
231			do { \
232			for (i = 0; i < (n); i++) \
233			if (!isxdigit(*value++)) \
234			return 0; \
235			if (*value++ != (c)) \
236			return 0; \
237			} while(0)
238
239			IS_XDIGITS(8, '-');
240			IS_XDIGITS(4, '-');
241			IS_XDIGITS(4, '-');
242			IS_XDIGITS(4, '-');
243			IS_XDIGITS(12, '\0');
244
245			return 1;
246			}
247
248			/*
249			* NumericString = 1*(DIGIT / SPACE)
250			*/
251			static int
252			syntax_is_numeric_string(struct schema schema, char value, size_t len)
253			{
254			char *p;
255
256			for (p = value; *p != '\0'; p++)
257			if (!isdigit((unsigned char)p) \|\| p != ' ')
258			return 0;
259
260			return p != value;
261			}
262
263			static int
264			syntax_is_time(struct schema schema, char value, size_t len, int gen)
265			{
266			int n;
267			char *p = value;
268
269			#define CHECK_RANGE(min, max) \
270			do { \
271			if (!isdigit((unsigned char)p[0]) \|\| \
272			!isdigit((unsigned char)p[1])) \
273			return 0; \
274			n = (p[0] - '0') * 10 + (p[1] - '0'); \
275			if (n < min \|\| n > max) \
276			return 0; \
277			p += 2; \
278			} while (0)
279
280			if (gen)
281			CHECK_RANGE(0, 99); /* century */
282			CHECK_RANGE(0, 99); /* year */
283			CHECK_RANGE(1, 12); /* month */
284			CHECK_RANGE(1, 31); /* day */
285			/* FIXME: should check number of days in month */
286			CHECK_RANGE(0, 23); /* hour */
287
288			if (!gen \|\| isdigit((unsigned char)*p)) {
289			CHECK_RANGE(0, 59); /* minute */
290			if (isdigit((unsigned char)*p))
291			CHECK_RANGE(0, 59+gen); /* second or leap-second */
292			if (!gen && *p == '\0')
293			return 1;
294			}
295			/* fraction */
296			if (!gen && ((p == ',' \|\| p == '.') &&
297			!isdigit((unsigned char)*++p)))
298			return 0;
299
300			if (p == '-' \|\| p == '+') {
301			++p;
302			CHECK_RANGE(0, 23); /* hour */
303			if (!gen \|\| isdigit((unsigned char)*p))
304			CHECK_RANGE(0, 59); /* minute */
305			} else if (*p++ != 'Z')
306			return 0;
307
308			return *p == '\0';
309			}
310
311			static int
312			syntax_is_gentime(struct schema schema, char value, size_t len)
313			{
314			return syntax_is_time(schema, value, len, 1);
315			}
316
317			static int
318			syntax_is_utctime(struct schema schema, char value, size_t len)
319			{
320			return syntax_is_time(schema, value, len, 0);
321			}
322
323			static int
324			syntax_is_country(struct schema schema, char value, size_t len)
325			{
326			if (len != 2)
327			return 0;
328			return syntax_is_printable_string(schema, value, len);
329			}
330
331			static int
332			syntax_is_bit_string(struct schema schema, char value, size_t len)
333			{
334			if (*value++ != '\'')
335			return 0;
336
337			for (; *value != '\0'; value++) {
338			if (*value == '\'')
339			break;
340			if (value != '0' && value != '1')
341			return 0;
342			}
343
344			if (++*value != 'B')
345			return 0;
346
347			return *value == '\0';
348			}
349
350			static int
351			syntax_is_boolean(struct schema schema, char value, size_t len)
352			{
353			return strcmp(value, "TRUE") == 0 \|\| strcmp(value, "FALSE") == 0;
354			}
355