Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/asn1/a_utf8.c	Lines:	84	85	98.8 %
Date:	2017-11-13	Branches:	67	68	98.5 %


/* $OpenBSD: a_utf8.c,v 1.8 2014/07/11 08:44:47 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>

#include <openssl/asn1.h>

#include "asn1_locl.h"

/* UTF8 utilities */

/*
 * This parses a UTF8 string one character at a time. It is passed a pointer
 * to the string and the length of the string. It sets 'value' to the value of
 * the current character. It returns the number of characters read or a
 * negative error code:
 * -1 = string too short
 * -2 = illegal character
 * -3 = subsequent characters not of the form 10xxxxxx
 * -4 = character encoded incorrectly (not minimal length).
 */

int
UTF8_getc(const unsigned char *str, int len, unsigned long *val)
{
	const unsigned char *p;
	unsigned long value;
	int ret;
	if (len <= 0)
		return 0;
	p = str;

	/* Check syntax and work out the encoded value (if correct) */
	if ((*p & 0x80) == 0) {
		value = *p++ & 0x7f;
		ret = 1;
	} else if ((*p & 0xe0) == 0xc0) {
		if (*p < 0xc2)
			return -2;
		if (len < 2)
			return -1;
		if ((p[1] & 0xc0) != 0x80)
			return -3;
		value = (*p++ & 0x1f) << 6;
		value |= *p++ & 0x3f;
		if (value < 0x80)
			return -4;
		ret = 2;
	} else if ((*p & 0xf0) == 0xe0) {
		if (len < 3)
			return -1;
		if (((p[1] & 0xc0) != 0x80) ||
		    ((p[2] & 0xc0) != 0x80))
			return -3;
		value = (*p++ & 0xf) << 12;
		value |= (*p++ & 0x3f) << 6;
		value |= *p++ & 0x3f;
		if (value < 0x800)
			return -4;
		/* surrogate pair code points are not valid */
		if (value >= 0xd800 && value < 0xe000)
			return -2;
		ret = 3;
	} else if ((*p & 0xf8) == 0xf0 && (*p < 0xf5)) {
		if (len < 4)
			return -1;
		if (((p[1] & 0xc0) != 0x80) ||
		    ((p[2] & 0xc0) != 0x80) ||
		    ((p[3] & 0xc0) != 0x80))
			return -3;
		value = ((unsigned long)(*p++ & 0x7)) << 18;
		value |= (*p++ & 0x3f) << 12;
		value |= (*p++ & 0x3f) << 6;
		value |= *p++ & 0x3f;
		if (value < 0x10000)
			return -4;
		if (value > UNICODE_MAX)
			return -2;
		ret = 4;
	} else
		return -2;
	*val = value;
	return ret;
}

/* This takes a Unicode code point 'value' and writes its UTF-8 encoded form
 * in 'str' where 'str' is a buffer of at least length 'len'.  If 'str'
 * is NULL, then nothing is written and just the return code is determined.

 * Returns less than zero on error:
 *  -1 if 'str' is not NULL and 'len' is too small
 *  -2 if 'value' is an invalid character (surrogate or out-of-range)
 *
 * Otherwise, returns the number of bytes in 'value's encoded form
 * (i.e., the number of bytes written to 'str' when it's not NULL).
 *
 * It will need at most 4 characters.
 */

int
UTF8_putc(unsigned char *str, int len, unsigned long value)
{
	if (value < 0x80) {
		if (str != NULL) {
			if (len < 1)
				return -1;
			str[0] = (unsigned char)value;
		}
		return 1;
	}
	if (value < 0x800) {
		if (str != NULL) {
			if (len < 2)
				return -1;
			str[0] = (unsigned char)(((value >> 6) & 0x1f) | 0xc0);
			str[1] = (unsigned char)((value & 0x3f) | 0x80);
		}
		return 2;
	}
	if (value < 0x10000) {
		if (UNICODE_IS_SURROGATE(value))
			return -2;
		if (str != NULL) {
			if (len < 3)
				return -1;
			str[0] = (unsigned char)(((value >> 12) & 0xf) | 0xe0);
			str[1] = (unsigned char)(((value >> 6) & 0x3f) | 0x80);
			str[2] = (unsigned char)((value & 0x3f) | 0x80);
		}
		return 3;
	}
	if (value <= UNICODE_MAX) {
		if (str != NULL) {
			if (len < 4)
				return -1;
			str[0] = (unsigned char)(((value >> 18) & 0x7) | 0xf0);
			str[1] = (unsigned char)(((value >> 12) & 0x3f) | 0x80);
			str[2] = (unsigned char)(((value >> 6) & 0x3f) | 0x80);
			str[3] = (unsigned char)((value & 0x3f) | 0x80);
		}
		return 4;
	}
	return -2;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: a_utf8.c,v 1.8 2014/07/11 08:44:47 jsing Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58
59			#include <stdio.h>
60
61			#include <openssl/asn1.h>
62
63			#include "asn1_locl.h"
64
65			/* UTF8 utilities */
66
67			/*
68			* This parses a UTF8 string one character at a time. It is passed a pointer
69			* to the string and the length of the string. It sets 'value' to the value of
70			* the current character. It returns the number of characters read or a
71			* negative error code:
72			* -1 = string too short
73			* -2 = illegal character
74			* -3 = subsequent characters not of the form 10xxxxxx
75			* -4 = character encoded incorrectly (not minimal length).
76			*/
77
78			int
79			UTF8_getc(const unsigned char str, int len, unsigned long val)
80			{
81			const unsigned char *p;
82			unsigned long value;
83			int ret;
84	✓✓	1027752708	if (len <= 0)
85		3	return 0;
86			p = str;
87
88			/* Check syntax and work out the encoded value (if correct) */
89	✓✓	513876351	if ((*p & 0x80) == 0) {
90		882168	value = *p++ & 0x7f;
91			ret = 1;
92	✓✓	513876351	} else if ((*p & 0xe0) == 0xc0) {
93	✓✓	55974	if (*p < 0xc2)
94		6	return -2;
95	✓✓	55968	if (len < 2)
96		23040	return -1;
97	✓✓	32928	if ((p[1] & 0xc0) != 0x80)
98		17280	return -3;
99		15648	value = (*p++ & 0x1f) << 6;
100		15648	value \|= *p++ & 0x3f;
101	✗✓	15648	if (value < 0x80)
102			return -4;
103			ret = 2;
104	✓✓	512953857	} else if ((*p & 0xf0) == 0xe0) {
105	✓✓	6475776	if (len < 3)
106		3145728	return -1;
107	✓✓✓✓	4300800	if (((p[1] & 0xc0) != 0x80) \|\|
108		970752	((p[2] & 0xc0) != 0x80))
109		2949120	return -3;
110		380928	value = (*p++ & 0xf) << 12;
111		380928	value \|= (*p++ & 0x3f) << 6;
112		380928	value \|= *p++ & 0x3f;
113	✓✓	380928	if (value < 0x800)
114		6144	return -4;
115			/* surrogate pair code points are not valid */
116	✓✓	374784	if (value >= 0xd800 && value < 0xe000)
117		6144	return -2;
118			ret = 3;
119	✓✓✓✓	1013293290	} else if ((p & 0xf8) == 0xf0 && (p < 0xf5)) {
120	✓✓	506462208	if (len < 4)
121		251658240	return -1;
122	✓✓✓✓	273678336	if (((p[1] & 0xc0) != 0x80) \|\|
123	✓✓	66060288	((p[2] & 0xc0) != 0x80) \|\|
124		18874368	((p[3] & 0xc0) != 0x80))
125		247726080	return -3;
126		7077888	value = ((unsigned long)(*p++ & 0x7)) << 18;
127		7077888	value \|= (*p++ & 0x3f) << 12;
128		7077888	value \|= (*p++ & 0x3f) << 6;
129		7077888	value \|= *p++ & 0x3f;
130	✓✓	7077888	if (value < 0x10000)
131		196608	return -4;
132	✓✓	6881280	if (value > UNICODE_MAX)
133		589824	return -2;
134			ret = 4;
135			} else
136		225	return -2;
137		7557912	*val = value;
138		7557912	return ret;
139		513876354	}
140
141			/* This takes a Unicode code point 'value' and writes its UTF-8 encoded form
142			* in 'str' where 'str' is a buffer of at least length 'len'. If 'str'
143			* is NULL, then nothing is written and just the return code is determined.
144
145			* Returns less than zero on error:
146			* -1 if 'str' is not NULL and 'len' is too small
147			* -2 if 'value' is an invalid character (surrogate or out-of-range)
148			*
149			* Otherwise, returns the number of bytes in 'value's encoded form
150			* (i.e., the number of bytes written to 'str' when it's not NULL).
151			*
152			* It will need at most 4 characters.
153			*/
154
155			int
156			UTF8_putc(unsigned char *str, int len, unsigned long value)
157			{
158	✓✓	25065142	if (value < 0x80) {
159	✓✓	2517470	if (str != NULL) {
160	✓✓	1258943	if (len < 1)
161		384	return -1;
162		1258559	str[0] = (unsigned char)value;
163		1258559	}
164		2517086	return 1;
165			}
166	✓✓	10015101	if (value < 0x800) {
167	✓✓	17280	if (str != NULL) {
168	✓✓	11520	if (len < 2)
169		5760	return -1;
170		5760	str[0] = (unsigned char)(((value >> 6) & 0x1f) \| 0xc0);
171		5760	str[1] = (unsigned char)((value & 0x3f) \| 0x80);
172		5760	}
173		11520	return 2;
174			}
175	✓✓	9997821	if (value < 0x10000) {
176	✓✓	559104	if (UNICODE_IS_SURROGATE(value))
177		6144	return -2;
178	✓✓	552960	if (str != NULL) {
179	✓✓	368640	if (len < 3)
180		184320	return -1;
181		184320	str[0] = (unsigned char)(((value >> 12) & 0xf) \| 0xe0);
182		184320	str[1] = (unsigned char)(((value >> 6) & 0x3f) \| 0x80);
183		184320	str[2] = (unsigned char)((value & 0x3f) \| 0x80);
184		184320	}
185		368640	return 3;
186			}
187	✓✓	9438717	if (value <= UNICODE_MAX) {
188	✓✓	9437184	if (str != NULL) {
189	✓✓	6291456	if (len < 4)
190		3145728	return -1;
191		3145728	str[0] = (unsigned char)(((value >> 18) & 0x7) \| 0xf0);
192		3145728	str[1] = (unsigned char)(((value >> 12) & 0x3f) \| 0x80);
193		3145728	str[2] = (unsigned char)(((value >> 6) & 0x3f) \| 0x80);
194		3145728	str[3] = (unsigned char)((value & 0x3f) \| 0x80);
195		3145728	}
196		6291456	return 4;
197			}
198		1533	return -2;
199		12532571	}