1 /*-
2 * Copyright (c) 2006 Verdens Gang AS
3 * Copyright (c) 2006-2009 Varnish Software AS
4 * All rights reserved.
5 *
6 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
7 *
8 * SPDX-License-Identifier: BSD-2-Clause
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33 /* from libvarnish/vct.c */
34
35 #include "vas.h"
36
37 #define VCT_OWS (1<<0)
38 #define VCT_CRLF (1<<1)
39 #define VCT_LWS (VCT_CRLF | VCT_OWS)
40 #define VCT_CTL (1<<2)
41 #define VCT_ALPHA (1<<3)
42 #define VCT_SEPARATOR (1<<4)
43 #define VCT_DIGIT (1<<5)
44 #define VCT_HEX (1<<6)
45 #define VCT_XMLNAMESTART (1<<7)
46 #define VCT_XMLNAME (1<<8)
47 #define VCT_TCHAR (1<<9)
48 #define VCT_ID (1<<10)
49 #define VCT_IDENT (VCT_ALPHA | VCT_DIGIT | VCT_ID)
50 #define VCT_BASE64 (1<<11)
51 #define VCT_VT (1<<12)
52 #define VCT_SPACE (VCT_LWS | VCT_VT)
53 #define VCT_UPPER (1<<13)
54 #define VCT_LOWER (1<<14)
55
56 extern const uint16_t vct_typtab[256];
57
58 const char *VCT_invalid_name(const char *b, const char *e);
59
60 static inline int
vct_is(int x,uint16_t y)61 vct_is(int x, uint16_t y)
62 {
63
64 x &= 0xff;
65 return (vct_typtab[x] & (y));
66 }
67
68 #define vct_isows(x) vct_is(x, VCT_OWS)
69 #define vct_issp(x) vct_is(x, VCT_OWS)
70 #define vct_ishex(x) vct_is(x, VCT_HEX)
71 #define vct_islws(x) vct_is(x, VCT_LWS)
72 #define vct_isctl(x) vct_is(x, VCT_CTL)
73 #define vct_isspace(x) vct_is(x, VCT_SPACE)
74 #define vct_isdigit(x) vct_is(x, VCT_DIGIT)
75 #define vct_isalpha(x) vct_is(x, VCT_ALPHA)
76 #define vct_islower(x) vct_is(x, VCT_LOWER)
77 #define vct_isupper(x) vct_is(x, VCT_UPPER)
78 #define vct_isalnum(x) vct_is(x, VCT_ALPHA | VCT_DIGIT)
79 #define vct_isbase64(x) vct_is(x, VCT_BASE64)
80 #define vct_issep(x) vct_is(x, VCT_SEPARATOR)
81 #define vct_issepctl(x) vct_is(x, VCT_SEPARATOR | VCT_CTL)
82 #define vct_isident1(x) vct_isalpha(x)
83 #define vct_isident(x) vct_is(x, VCT_IDENT)
84 #define vct_isxmlnamestart(x) vct_is(x, VCT_XMLNAMESTART)
85 #define vct_isxmlname(x) vct_is(x, VCT_XMLNAMESTART | VCT_XMLNAME)
86 #define vct_istchar(x) vct_is(x, VCT_ALPHA | VCT_DIGIT | VCT_TCHAR)
87 #define vct_ishdrval(x) \
88 (((uint8_t)(x) >= 0x20 && (uint8_t)(x) != 0x7f) ||(uint8_t)(x) == 0x09)
89
90 static inline int
vct_iscrlf(const char * p,const char * end)91 vct_iscrlf(const char* p, const char* end)
92 {
93 assert(p <= end);
94 if (p == end)
95 return (0);
96 if ((p[0] == 0x0d && (p+1 < end) && p[1] == 0x0a)) // CR LF
97 return (2);
98 if (p[0] == 0x0a) // LF
99 return (1);
100 return (0);
101 }
102
103 /* NB: VCT always operate in ASCII, don't replace 0x0d with \r etc. */
104 static inline char*
vct_skipcrlf(char * p,const char * end)105 vct_skipcrlf(char* p, const char* end)
106 {
107 return (p + vct_iscrlf(p, end));
108 }
109