GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/asn1/a_utf8.c Lines: 84 85 98.8 %
Date: 2017-11-07 Branches: 67 68 98.5 %

Line Branch Exec Source
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/* $OpenBSD: a_utf8.c,v 1.8 2014/07/11 08:44:47 jsing Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
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 * [including the GNU Public Licence.]
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 */
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#include <stdio.h>
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#include <openssl/asn1.h>
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#include "asn1_locl.h"
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/* UTF8 utilities */
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/*
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 * This parses a UTF8 string one character at a time. It is passed a pointer
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 * to the string and the length of the string. It sets 'value' to the value of
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 * the current character. It returns the number of characters read or a
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 * negative error code:
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 * -1 = string too short
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 * -2 = illegal character
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 * -3 = subsequent characters not of the form 10xxxxxx
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 * -4 = character encoded incorrectly (not minimal length).
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 */
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int
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UTF8_getc(const unsigned char *str, int len, unsigned long *val)
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{
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	const unsigned char *p;
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	unsigned long value;
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	int ret;
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2053843964
	if (len <= 0)
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6
		return 0;
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	p = str;
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	/* Check syntax and work out the encoded value (if correct) */
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1026921976
	if ((*p & 0x80) == 0) {
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936682
		value = *p++ & 0x7f;
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		ret = 1;
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1026921976
	} else if ((*p & 0xe0) == 0xc0) {
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108876
		if (*p < 0xc2)
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12
			return -2;
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108864
		if (len < 2)
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46080
			return -1;
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62784
		if ((p[1] & 0xc0) != 0x80)
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34560
			return -3;
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28224
		value = (*p++ & 0x1f) << 6;
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28224
		value |= *p++ & 0x3f;
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28224
		if (value < 0x80)
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			return -4;
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		ret = 2;
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1025904642
	} else if ((*p & 0xf0) == 0xe0) {
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12951552
		if (len < 3)
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6291456
			return -1;
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8601600
		if (((p[1] & 0xc0) != 0x80) ||
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1941504
		    ((p[2] & 0xc0) != 0x80))
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5898240
			return -3;
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761856
		value = (*p++ & 0xf) << 12;
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761856
		value |= (*p++ & 0x3f) << 6;
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761856
		value |= *p++ & 0x3f;
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761856
		if (value < 0x800)
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12288
			return -4;
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		/* surrogate pair code points are not valid */
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749568
		if (value >= 0xd800 && value < 0xe000)
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12288
			return -2;
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		ret = 3;
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2026586580
	} else if ((*p & 0xf8) == 0xf0 && (*p < 0xf5)) {
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1012924416
		if (len < 4)
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503316480
			return -1;
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547356672
		if (((p[1] & 0xc0) != 0x80) ||
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132120576
		    ((p[2] & 0xc0) != 0x80) ||
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37748736
		    ((p[3] & 0xc0) != 0x80))
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495452160
			return -3;
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14155776
		value = ((unsigned long)(*p++ & 0x7)) << 18;
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14155776
		value |= (*p++ & 0x3f) << 12;
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14155776
		value |= (*p++ & 0x3f) << 6;
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14155776
		value |= *p++ & 0x3f;
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14155776
		if (value < 0x10000)
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393216
			return -4;
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13762560
		if (value > UNICODE_MAX)
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1179648
			return -2;
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		ret = 4;
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	} else
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450
		return -2;
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14285098
	*val = value;
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14285098
	return ret;
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1026921982
}
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/* This takes a Unicode code point 'value' and writes its UTF-8 encoded form
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 * in 'str' where 'str' is a buffer of at least length 'len'.  If 'str'
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 * is NULL, then nothing is written and just the return code is determined.
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 * Returns less than zero on error:
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 *  -1 if 'str' is not NULL and 'len' is too small
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 *  -2 if 'value' is an invalid character (surrogate or out-of-range)
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 *
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 * Otherwise, returns the number of bytes in 'value's encoded form
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 * (i.e., the number of bytes written to 'str' when it's not NULL).
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 *
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 * It will need at most 4 characters.
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 */
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int
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UTF8_putc(unsigned char *str, int len, unsigned long value)
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{
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46371220
	if (value < 0x80) {
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3155408
		if (str != NULL) {
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1578104
			if (len < 1)
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768
				return -1;
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1577336
			str[0] = (unsigned char)value;
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1577336
		}
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3154640
		return 1;
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	}
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20030202
	if (value < 0x800) {
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34560
		if (str != NULL) {
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23040
			if (len < 2)
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11520
				return -1;
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11520
			str[0] = (unsigned char)(((value >> 6) & 0x1f) | 0xc0);
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11520
			str[1] = (unsigned char)((value & 0x3f) | 0x80);
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11520
		}
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23040
		return 2;
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	}
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19995642
	if (value < 0x10000) {
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1118208
		if (UNICODE_IS_SURROGATE(value))
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12288
			return -2;
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1105920
		if (str != NULL) {
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737280
			if (len < 3)
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368640
				return -1;
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368640
			str[0] = (unsigned char)(((value >> 12) & 0xf) | 0xe0);
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368640
			str[1] = (unsigned char)(((value >> 6) & 0x3f) | 0x80);
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368640
			str[2] = (unsigned char)((value & 0x3f) | 0x80);
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368640
		}
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737280
		return 3;
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	}
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18877434
	if (value <= UNICODE_MAX) {
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18874368
		if (str != NULL) {
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12582912
			if (len < 4)
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6291456
				return -1;
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6291456
			str[0] = (unsigned char)(((value >> 18) & 0x7) | 0xf0);
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6291456
			str[1] = (unsigned char)(((value >> 12) & 0x3f) | 0x80);
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6291456
			str[2] = (unsigned char)(((value >> 6) & 0x3f) | 0x80);
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6291456
			str[3] = (unsigned char)((value & 0x3f) | 0x80);
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6291456
		}
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12582912
		return 4;
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	}
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3066
	return -2;
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23185610
}