1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/* apk_blob.h - Alpine Package Keeper (APK)
*
* Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
* Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-only
*/
#ifndef APK_BLOB_H
#define APK_BLOB_H
#include <ctype.h>
#include <string.h>
#include "apk_defines.h"
#include "apk_openssl.h"
typedef const unsigned char *apk_spn_match;
typedef unsigned char apk_spn_match_def[256 / 8];
struct apk_blob {
long len;
char *ptr;
};
typedef struct apk_blob apk_blob_t;
typedef int (*apk_blob_cb)(void *ctx, apk_blob_t blob);
#define BLOB_FMT "%.*s"
#define BLOB_PRINTF(b) (int)(b).len, (b).ptr
#define APK_CHECKSUM_NONE 0
#define APK_CHECKSUM_MD5 16
#define APK_CHECKSUM_SHA1 20
#define APK_CHECKSUM_DEFAULT APK_CHECKSUM_SHA1
#define APK_CHECKSUM_MAX APK_CHECKSUM_SHA1
/* Enough space for a hexdump of the longest checksum possible plus
* a two-character type prefix */
#define APK_BLOB_CHECKSUM_BUF (2 + (2 * APK_CHECKSUM_MAX))
/* Internal container for checksums */
struct apk_checksum {
unsigned char data[APK_CHECKSUM_MAX];
unsigned char type;
};
static inline const EVP_MD *apk_checksum_evp(int type)
{
switch (type) {
case APK_CHECKSUM_MD5:
return EVP_md5();
case APK_CHECKSUM_SHA1:
return EVP_sha1();
}
return EVP_md_null();
}
static inline const EVP_MD *apk_checksum_default(void)
{
return apk_checksum_evp(APK_CHECKSUM_DEFAULT);
}
#define APK_BLOB_IS_NULL(blob) ((blob).ptr == NULL)
#define APK_BLOB_NULL ((apk_blob_t){0, NULL})
#define APK_BLOB_BUF(buf) ((apk_blob_t){sizeof(buf), (char *)(buf)})
#define APK_BLOB_CSUM(csum) ((apk_blob_t){(csum).type, (char *)(csum).data})
#define APK_BLOB_STRUCT(s) ((apk_blob_t){sizeof(s), (char*)&(s)})
#define APK_BLOB_STRLIT(s) ((apk_blob_t){sizeof(s)-1, (char *)(s)})
#define APK_BLOB_PTR_LEN(beg,len) ((apk_blob_t){(len), (beg)})
#define APK_BLOB_PTR_PTR(beg,end) APK_BLOB_PTR_LEN((beg),(end)-(beg)+1)
static inline apk_blob_t APK_BLOB_STR(const char *str)
{
if (str == NULL)
return APK_BLOB_NULL;
return ((apk_blob_t){strlen(str), (void *)(str)});
}
static inline apk_blob_t apk_blob_trim(apk_blob_t blob)
{
apk_blob_t b = blob;
while (b.len > 0 && isspace(b.ptr[b.len-1]))
b.len--;
return b;
}
char *apk_blob_cstr(apk_blob_t str);
int apk_blob_spn(apk_blob_t blob, const apk_spn_match accept, apk_blob_t *l, apk_blob_t *r);
int apk_blob_cspn(apk_blob_t blob, const apk_spn_match reject, apk_blob_t *l, apk_blob_t *r);
int apk_blob_split(apk_blob_t blob, apk_blob_t split, apk_blob_t *l, apk_blob_t *r);
int apk_blob_rsplit(apk_blob_t blob, char split, apk_blob_t *l, apk_blob_t *r);
apk_blob_t apk_blob_pushed(apk_blob_t buffer, apk_blob_t left);
unsigned long apk_blob_hash_seed(apk_blob_t, unsigned long seed);
unsigned long apk_blob_hash(apk_blob_t str);
int apk_blob_compare(apk_blob_t a, apk_blob_t b);
int apk_blob_sort(apk_blob_t a, apk_blob_t b);
int apk_blob_starts_with(apk_blob_t a, apk_blob_t b);
int apk_blob_ends_with(apk_blob_t str, apk_blob_t suffix);
int apk_blob_for_each_segment(apk_blob_t blob, const char *split,
apk_blob_cb cb, void *ctx);
static inline void apk_blob_checksum(apk_blob_t b, const EVP_MD *md, struct apk_checksum *csum)
{
csum->type = EVP_MD_size(md);
EVP_Digest(b.ptr, b.len, csum->data, NULL, md, NULL);
}
static inline char *apk_blob_chr(apk_blob_t b, unsigned char ch)
{
return memchr(b.ptr, ch, b.len);
}
void apk_blob_push_blob(apk_blob_t *to, apk_blob_t literal);
void apk_blob_push_uint(apk_blob_t *to, unsigned int value, int radix);
void apk_blob_push_csum(apk_blob_t *to, struct apk_checksum *csum);
void apk_blob_push_base64(apk_blob_t *to, apk_blob_t binary);
void apk_blob_push_hexdump(apk_blob_t *to, apk_blob_t binary);
void apk_blob_push_fmt(apk_blob_t *to, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
void apk_blob_pull_char(apk_blob_t *b, int expected);
unsigned int apk_blob_pull_uint(apk_blob_t *b, int radix);
void apk_blob_pull_csum(apk_blob_t *b, struct apk_checksum *csum);
void apk_blob_pull_base64(apk_blob_t *b, apk_blob_t to);
void apk_blob_pull_hexdump(apk_blob_t *b, apk_blob_t to);
int apk_blob_pull_blob_match(apk_blob_t *b, apk_blob_t match);
#if defined(__GLIBC__) && !defined(__UCLIBC__)
extern size_t strlcpy(char *dest, const char *src, size_t size);
#endif
#endif
|
