2 * uclient - ustream based protocol client library
4 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 #include <libubox/md5.h>
24 #include <libubox/utils.h>
26 #include "uclient-utils.h"
28 static const char *b64
=
29 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
31 void base64_encode(const void *inbuf
, unsigned int len
, void *outbuf
)
33 unsigned char *out
= outbuf
;
34 const uint8_t *in
= inbuf
;
38 for (i
= 0; i
< len
- pad
; i
+= 3) {
39 uint32_t in3
= (in
[0] << 16) | (in
[1] << 8) | in
[2];
42 for (k
= 3; k
>= 0; k
--) {
43 out
[k
] = b64
[in3
& 0x3f];
51 uint32_t in2
= in
[0] << (16 - 6);
56 in2
|= in
[1] << (8 - 6);
57 out
[2] = b64
[in2
& 0x3f];
63 out
[1] = b64
[in2
& 0x3f];
65 out
[0] = b64
[in2
& 0x3f];
73 int uclient_urldecode(const char *in
, char *out
, bool decode_plus
)
79 while ((c
= *(in
++))) {
81 if (!isxdigit(in
[0]) || !isxdigit(in
[1]))
86 c
= strtol(dec
, NULL
, 16);
88 } else if (decode_plus
&& c
== '+') {
100 static char hex_digit(char val
)
102 val
+= val
> 9 ? 'a' - 10 : '0';
106 void bin_to_hex(char *dest
, const void *buf
, int len
)
108 const uint8_t *data
= buf
;
111 for (i
= 0; i
< len
; i
++) {
112 *(dest
++) = hex_digit(data
[i
] >> 4);
113 *(dest
++) = hex_digit(data
[i
] & 0xf);
118 static void http_create_hash(char *dest
, const char * const * str
, int n_str
)
125 for (i
= 0; i
< n_str
; i
++) {
127 md5_hash(":", 1, &md5
);
128 md5_hash(str
[i
], strlen(str
[i
]), &md5
);
131 bin_to_hex(dest
, &hash
, sizeof(hash
));
134 void http_digest_calculate_auth_hash(char *dest
, const char *user
, const char *realm
, const char *password
)
136 const char *hash_str
[] = {
142 http_create_hash(dest
, hash_str
, ARRAY_SIZE(hash_str
));
145 void http_digest_calculate_response(char *dest
, const struct http_digest_data
*data
)
147 const char *h_a2_strings
[] = {
151 const char *resp_strings
[] = {
157 dest
, /* initialized to H(A2) first */
160 http_create_hash(dest
, h_a2_strings
, ARRAY_SIZE(h_a2_strings
));
161 http_create_hash(dest
, resp_strings
, ARRAY_SIZE(resp_strings
));