/src/krb5/src/include/k5-input.h

Source (jump to first uncovered line)
/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* include/k5-input.h - k5input helper functions */
/*
 * Copyright (C) 2014 by the Massachusetts Institute of Technology.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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
 * COPYRIGHT HOLDER 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.
 */

#ifndef K5_INPUT_H
#define K5_INPUT_H

#include "k5-platform.h"

/*
 * The k5input module defines helpers for safely consuming a fixed-sized block
 * of memory.  If an overrun or allocation failure occurs at any step,
 * subsequent functions will return default values until the error is detected
 * by looking at the status field.
 */

struct k5input {
    const unsigned char *ptr;
    size_t len;
    int32_t status;
};

static inline void
k5_input_init(struct k5input *in, const void *ptr, size_t len)
{
    in->ptr = ptr;
    in->len = len;
    in->status = 0;
}

/* Only set the status value of in if it hasn't already been set, so status
 * reflects the first thing to go wrong. */
static inline void
k5_input_set_status(struct k5input *in, int32_t status)
{
    if (!in->status)
        in->status = status;
}

static inline const unsigned char *
k5_input_get_bytes(struct k5input *in, size_t len)
{
    if (in->len < len)
        k5_input_set_status(in, EINVAL);
    if (in->status)
        return NULL;
    in->len -= len;
    in->ptr += len;
    return in->ptr - len;
}

static inline unsigned char
k5_input_get_byte(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 1);
    return (ptr == NULL) ? '\0' : *ptr;
}

static inline uint16_t
k5_input_get_uint16_be(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 2);
    return (ptr == NULL) ? 0 : load_16_be(ptr);
}

static inline uint16_t
k5_input_get_uint16_le(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 2);
    return (ptr == NULL) ? 0 : load_16_le(ptr);
}

static inline uint16_t
k5_input_get_uint16_n(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 2);
    return (ptr == NULL) ? 0 : load_16_n(ptr);
}

static inline uint32_t
k5_input_get_uint32_be(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 4);
    return (ptr == NULL) ? 0 : load_32_be(ptr);
}

static inline uint32_t
k5_input_get_uint32_le(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 4);
    return (ptr == NULL) ? 0 : load_32_le(ptr);
}

static inline uint32_t
k5_input_get_uint32_n(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 4);
    return (ptr == NULL) ? 0 : load_32_n(ptr);
}

static inline uint64_t
k5_input_get_uint64_be(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 8);
    return (ptr == NULL) ? 0 : load_64_be(ptr);
}

static inline uint64_t
k5_input_get_uint64_le(struct k5input *in)
{
    const unsigned char *ptr = k5_input_get_bytes(in, 8);
    return (ptr == NULL) ? 0 : load_64_le(ptr);
}

#endif /* K5_BUF_H */

Line	Count	Source (jump to first uncovered line)
1		/* -- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -- */
2		/* include/k5-input.h - k5input helper functions */
3		/*
4		* Copyright (C) 2014 by the Massachusetts Institute of Technology.
5		* All rights reserved.
6		*
7		* Redistribution and use in source and binary forms, with or without
8		* modification, are permitted provided that the following conditions
9		* are met:
10		*
11		* * Redistributions of source code must retain the above copyright
12		* notice, this list of conditions and the following disclaimer.
13		*
14		* * Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in
16		* the documentation and/or other materials provided with the
17		* distribution.
18		*
19		* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20		* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21		* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22		* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23		* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
24		* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25		* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26		* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28		* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29		* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
30		* OF THE POSSIBILITY OF SUCH DAMAGE.
31		*/
32
33		#ifndef K5_INPUT_H
34		#define K5_INPUT_H
35
36		#include "k5-platform.h"
37
38		/*
39		* The k5input module defines helpers for safely consuming a fixed-sized block
40		* of memory. If an overrun or allocation failure occurs at any step,
41		* subsequent functions will return default values until the error is detected
42		* by looking at the status field.
43		*/
44
45		struct k5input {
46		const unsigned char *ptr;
47		size_t len;
48		int32_t status;
49		};
50
51		static inline void
52		k5_input_init(struct k5input in, const void ptr, size_t len)
53	0	{
54	0	in->ptr = ptr;
55	0	in->len = len;
56	0	in->status = 0;
57	0	} Unexecuted instantiation: pac.c:k5_input_init Unexecuted instantiation: cc_kcm.c:k5_input_init Unexecuted instantiation: ucstr.c:k5_input_init Unexecuted instantiation: dnsglue.c:k5_input_init Unexecuted instantiation: dnssrv.c:k5_input_init Unexecuted instantiation: ccmarshal.c:k5_input_init Unexecuted instantiation: utf8_conv.c:k5_input_init
58
59		/* Only set the status value of in if it hasn't already been set, so status
60		* reflects the first thing to go wrong. */
61		static inline void
62		k5_input_set_status(struct k5input *in, int32_t status)
63	0	{
64	0	if (!in->status)
65	0	in->status = status;
66	0	} Unexecuted instantiation: pac.c:k5_input_set_status Unexecuted instantiation: cc_kcm.c:k5_input_set_status Unexecuted instantiation: ucstr.c:k5_input_set_status Unexecuted instantiation: dnsglue.c:k5_input_set_status Unexecuted instantiation: dnssrv.c:k5_input_set_status Unexecuted instantiation: ccmarshal.c:k5_input_set_status Unexecuted instantiation: utf8_conv.c:k5_input_set_status
67
68		static inline const unsigned char *
69		k5_input_get_bytes(struct k5input *in, size_t len)
70	0	{
71	0	if (in->len < len)
72	0	k5_input_set_status(in, EINVAL);
73	0	if (in->status)
74	0	return NULL;
75	0	in->len -= len;
76	0	in->ptr += len;
77	0	return in->ptr - len;
78	0	} Unexecuted instantiation: pac.c:k5_input_get_bytes Unexecuted instantiation: cc_kcm.c:k5_input_get_bytes Unexecuted instantiation: ucstr.c:k5_input_get_bytes Unexecuted instantiation: dnsglue.c:k5_input_get_bytes Unexecuted instantiation: dnssrv.c:k5_input_get_bytes Unexecuted instantiation: ccmarshal.c:k5_input_get_bytes Unexecuted instantiation: utf8_conv.c:k5_input_get_bytes
79
80		static inline unsigned char
81		k5_input_get_byte(struct k5input *in)
82	0	{
83	0	const unsigned char *ptr = k5_input_get_bytes(in, 1);
84	0	return (ptr == NULL) ? '\0' : *ptr;
85	0	} Unexecuted instantiation: pac.c:k5_input_get_byte Unexecuted instantiation: cc_kcm.c:k5_input_get_byte Unexecuted instantiation: ucstr.c:k5_input_get_byte Unexecuted instantiation: dnsglue.c:k5_input_get_byte Unexecuted instantiation: dnssrv.c:k5_input_get_byte Unexecuted instantiation: ccmarshal.c:k5_input_get_byte Unexecuted instantiation: utf8_conv.c:k5_input_get_byte
86
87		static inline uint16_t
88		k5_input_get_uint16_be(struct k5input *in)
89	0	{
90	0	const unsigned char *ptr = k5_input_get_bytes(in, 2);
91	0	return (ptr == NULL) ? 0 : load_16_be(ptr);
92	0	} Unexecuted instantiation: pac.c:k5_input_get_uint16_be Unexecuted instantiation: cc_kcm.c:k5_input_get_uint16_be Unexecuted instantiation: ucstr.c:k5_input_get_uint16_be Unexecuted instantiation: dnsglue.c:k5_input_get_uint16_be Unexecuted instantiation: dnssrv.c:k5_input_get_uint16_be Unexecuted instantiation: ccmarshal.c:k5_input_get_uint16_be Unexecuted instantiation: utf8_conv.c:k5_input_get_uint16_be
93
94		static inline uint16_t
95		k5_input_get_uint16_le(struct k5input *in)
96	0	{
97	0	const unsigned char *ptr = k5_input_get_bytes(in, 2);
98	0	return (ptr == NULL) ? 0 : load_16_le(ptr);
99	0	} Unexecuted instantiation: pac.c:k5_input_get_uint16_le Unexecuted instantiation: cc_kcm.c:k5_input_get_uint16_le Unexecuted instantiation: ucstr.c:k5_input_get_uint16_le Unexecuted instantiation: dnsglue.c:k5_input_get_uint16_le Unexecuted instantiation: dnssrv.c:k5_input_get_uint16_le Unexecuted instantiation: ccmarshal.c:k5_input_get_uint16_le Unexecuted instantiation: utf8_conv.c:k5_input_get_uint16_le
100
101		static inline uint16_t
102		k5_input_get_uint16_n(struct k5input *in)
103	0	{
104	0	const unsigned char *ptr = k5_input_get_bytes(in, 2);
105	0	return (ptr == NULL) ? 0 : load_16_n(ptr);
106	0	} Unexecuted instantiation: pac.c:k5_input_get_uint16_n Unexecuted instantiation: cc_kcm.c:k5_input_get_uint16_n Unexecuted instantiation: ucstr.c:k5_input_get_uint16_n Unexecuted instantiation: dnsglue.c:k5_input_get_uint16_n Unexecuted instantiation: dnssrv.c:k5_input_get_uint16_n Unexecuted instantiation: ccmarshal.c:k5_input_get_uint16_n Unexecuted instantiation: utf8_conv.c:k5_input_get_uint16_n
107
108		static inline uint32_t
109		k5_input_get_uint32_be(struct k5input *in)
110	0	{
111	0	const unsigned char *ptr = k5_input_get_bytes(in, 4);
112	0	return (ptr == NULL) ? 0 : load_32_be(ptr);
113	0	} Unexecuted instantiation: pac.c:k5_input_get_uint32_be Unexecuted instantiation: cc_kcm.c:k5_input_get_uint32_be Unexecuted instantiation: ucstr.c:k5_input_get_uint32_be Unexecuted instantiation: dnsglue.c:k5_input_get_uint32_be Unexecuted instantiation: dnssrv.c:k5_input_get_uint32_be Unexecuted instantiation: ccmarshal.c:k5_input_get_uint32_be Unexecuted instantiation: utf8_conv.c:k5_input_get_uint32_be
114
115		static inline uint32_t
116		k5_input_get_uint32_le(struct k5input *in)
117	0	{
118	0	const unsigned char *ptr = k5_input_get_bytes(in, 4);
119	0	return (ptr == NULL) ? 0 : load_32_le(ptr);
120	0	} Unexecuted instantiation: pac.c:k5_input_get_uint32_le Unexecuted instantiation: cc_kcm.c:k5_input_get_uint32_le Unexecuted instantiation: ucstr.c:k5_input_get_uint32_le Unexecuted instantiation: dnsglue.c:k5_input_get_uint32_le Unexecuted instantiation: dnssrv.c:k5_input_get_uint32_le Unexecuted instantiation: ccmarshal.c:k5_input_get_uint32_le Unexecuted instantiation: utf8_conv.c:k5_input_get_uint32_le
121
122		static inline uint32_t
123		k5_input_get_uint32_n(struct k5input *in)
124	0	{
125	0	const unsigned char *ptr = k5_input_get_bytes(in, 4);
126	0	return (ptr == NULL) ? 0 : load_32_n(ptr);
127	0	} Unexecuted instantiation: pac.c:k5_input_get_uint32_n Unexecuted instantiation: cc_kcm.c:k5_input_get_uint32_n Unexecuted instantiation: ucstr.c:k5_input_get_uint32_n Unexecuted instantiation: dnsglue.c:k5_input_get_uint32_n Unexecuted instantiation: dnssrv.c:k5_input_get_uint32_n Unexecuted instantiation: ccmarshal.c:k5_input_get_uint32_n Unexecuted instantiation: utf8_conv.c:k5_input_get_uint32_n
128
129		static inline uint64_t
130		k5_input_get_uint64_be(struct k5input *in)
131	0	{
132	0	const unsigned char *ptr = k5_input_get_bytes(in, 8);
133	0	return (ptr == NULL) ? 0 : load_64_be(ptr);
134	0	} Unexecuted instantiation: pac.c:k5_input_get_uint64_be Unexecuted instantiation: cc_kcm.c:k5_input_get_uint64_be Unexecuted instantiation: ucstr.c:k5_input_get_uint64_be Unexecuted instantiation: dnsglue.c:k5_input_get_uint64_be Unexecuted instantiation: dnssrv.c:k5_input_get_uint64_be Unexecuted instantiation: ccmarshal.c:k5_input_get_uint64_be Unexecuted instantiation: utf8_conv.c:k5_input_get_uint64_be
135
136		static inline uint64_t
137		k5_input_get_uint64_le(struct k5input *in)
138	0	{
139	0	const unsigned char *ptr = k5_input_get_bytes(in, 8);
140	0	return (ptr == NULL) ? 0 : load_64_le(ptr);
141	0	} Unexecuted instantiation: pac.c:k5_input_get_uint64_le Unexecuted instantiation: cc_kcm.c:k5_input_get_uint64_le Unexecuted instantiation: ucstr.c:k5_input_get_uint64_le Unexecuted instantiation: dnsglue.c:k5_input_get_uint64_le Unexecuted instantiation: dnssrv.c:k5_input_get_uint64_le Unexecuted instantiation: ccmarshal.c:k5_input_get_uint64_le Unexecuted instantiation: utf8_conv.c:k5_input_get_uint64_le
142
143		#endif /* K5_BUF_H */

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Created: 2025-06-22 06:14