GCOV - Varnish Cache

		varnish-cache/vmod/vmod_blob_base64.c
0		/*-
1		* Copyright 2015-2016 UPLEX - Nils Goroll Systemoptimierung
2		* All rights reserved.
3		*
4		* Authors: Nils Goroll <nils.goroll@uplex.de>
5		* Geoffrey Simmons <geoffrey.simmons@uplex.de>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions are met:
11		* 1. Redistributions of source code must retain the above copyright notice,
12		* this list of conditions and the following disclaimer.
13		* 2. Redistributions in binary form must reproduce the above copyright notice,
14		* this list of conditions and the following disclaimer in the documentation
15		* and/or other materials provided with the distribution.
16		*
17		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
18		* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19		* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20		* DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
21		* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22		* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23		* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24		* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25		* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26		* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27		*
28		*/
29
30		#include "config.h"
31
32		#include "vdef.h"
33		#include "vrt.h"
34		#include "vas.h"
35
36		#include "vmod_blob.h"
37
38		static const struct b64_alphabet {
39		const char b64[64];
40		const int8_t i64[256];
41		const int padding;
42		} b64_alphabet[] = {
43		[BASE64] = {
44		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"
45		"ghijklmnopqrstuvwxyz0123456789+/",
46		{
47		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
48		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
49		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
50		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
51		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
52		ILL, ILL, ILL, 62, ILL, ILL, ILL, 63, /* +, / */
53		52, 53, 54, 55, 56, 57, 58, 59, /* 0 - 7 */
54		60, 61, ILL, ILL, ILL, PAD, ILL, ILL, /* 8, 9, = */
55		ILL, 0, 1, 2, 3, 4, 5, 6, /* A - G */
56		7, 8, 9, 10, 11, 12, 13, 14, /* H - O */
57		15, 16, 17, 18, 19, 20, 21, 22, /* P - W */
58		23, 24, 25, ILL, ILL, ILL, ILL, ILL, /* X, Y, Z */
59		ILL, 26, 27, 28, 29, 30, 31, 32, /* a - g */
60		33, 34, 35, 36, 37, 38, 39, 40, /* h - o */
61		41, 42, 43, 44, 45, 46, 47, 48, /* p - w */
62		49, 50, 51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */
63		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
64		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
65		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
66		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
67		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
68		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
69		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
70		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
71		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
72		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
73		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
74		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
75		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
76		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
77		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
78		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
79		},
80		'='
81		},
82		[BASE64URL] = {
83		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"
84		"ghijklmnopqrstuvwxyz0123456789-_",
85		{
86		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
87		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
88		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
89		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
90		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
91		ILL, ILL, ILL, ILL, ILL, 62, ILL, ILL, /* - */
92		52, 53, 54, 55, 56, 57, 58, 59, /* 0 - 7 */
93		60, 61, ILL, ILL, ILL, PAD, ILL, ILL, /* 8, 9, = */
94		ILL, 0, 1, 2, 3, 4, 5, 6, /* A - G */
95		7, 8, 9, 10, 11, 12, 13, 14, /* H - O */
96		15, 16, 17, 18, 19, 20, 21, 22, /* P - W */
97		23, 24, 25, ILL, ILL, ILL, ILL, 63, /* X-Z, _ */
98		ILL, 26, 27, 28, 29, 30, 31, 32, /* a - g */
99		33, 34, 35, 36, 37, 38, 39, 40, /* h - o */
100		41, 42, 43, 44, 45, 46, 47, 48, /* p - w */
101		49, 50, 51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */
102		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
103		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
104		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
105		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
106		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
107		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
108		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
109		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
110		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
111		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
112		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
113		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
114		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
115		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
116		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
117		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
118		},
119		'='
120		},
121		[BASE64URLNOPAD] = {
122		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"
123		"ghijklmnopqrstuvwxyz0123456789-_",
124		{
125		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
126		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
127		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
128		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
129		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
130		ILL, ILL, ILL, ILL, ILL, 62, ILL, ILL, /* - */
131		52, 53, 54, 55, 56, 57, 58, 59, /* 0 - 7 */
132		60, 61, ILL, ILL, ILL, ILL, ILL, ILL, /* 8, 9 */
133		ILL, 0, 1, 2, 3, 4, 5, 6, /* A - G */
134		7, 8, 9, 10, 11, 12, 13, 14, /* H - O */
135		15, 16, 17, 18, 19, 20, 21, 22, /* P - W */
136		23, 24, 25, ILL, ILL, ILL, ILL, 63, /* X-Z, _ */
137		ILL, 26, 27, 28, 29, 30, 31, 32, /* a - g */
138		33, 34, 35, 36, 37, 38, 39, 40, /* h - o */
139		41, 42, 43, 44, 45, 46, 47, 48, /* p - w */
140		49, 50, 51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */
141		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
142		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
143		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
144		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
145		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
146		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
147		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
148		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
149		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
150		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
151		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
152		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
153		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
154		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
155		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
156		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
157		},
158		0
159		},
160		[BASE64CF] = {
161		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"
162		"ghijklmnopqrstuvwxyz0123456789-~",
163		{
164		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
165		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
166		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
167		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
168		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
169		ILL, ILL, ILL, ILL, ILL, 62, ILL, ILL, /* - */
170		52, 53, 54, 55, 56, 57, 58, 59, /* 0 - 7 */
171		60, 61, ILL, ILL, ILL, ILL, ILL, ILL, /* 8, 9 */
172		ILL, 0, 1, 2, 3, 4, 5, 6, /* A - G */
173		7, 8, 9, 10, 11, 12, 13, 14, /* H - O */
174		15, 16, 17, 18, 19, 20, 21, 22, /* P - W */
175		23, 24, 25, ILL, ILL, ILL, ILL, PAD, /* X, Y, Z, _ */
176		ILL, 26, 27, 28, 29, 30, 31, 32, /* a - g */
177		33, 34, 35, 36, 37, 38, 39, 40, /* h - o */
178		41, 42, 43, 44, 45, 46, 47, 48, /* p - w */
179		49, 50, 51, ILL, ILL, ILL, 63, ILL, /* x, y, z, ~*/
180		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
181		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
182		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
183		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
184		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
185		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
186		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
187		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
188		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
189		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
190		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
191		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
192		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
193		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
194		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
195		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
196		},
197		'_'
198		}
199		};
200		#define base64_l(l) (((l) << 2) / 3)
201
202		size_t
203	35	base64nopad_encode_l(size_t l)
204		{
205	35	return (base64_l(l) + 4);
206		}
207
208		size_t
209	99	base64_encode_l(size_t l)
210		{
211	99	return ((((base64_l(l)) + 3) & ~3) + 1);
212		}
213
214		size_t
215	64	base64_decode_l(size_t l)
216		{
217	64	return ((l * 3) >> 2);
218		}
219
220		static inline int
221	2537	decode(char restrict restrict dest, blob_src_t buf,
222		blob_len_t buflen, unsigned u, const int n)
223		{
224		char *d;
225		int i;
226
227	2537	if (n <= 1) {
228	0	errno = EINVAL;
229	0	return (-1);
230		}
231	2537	d = *dest;
232	10059	for (i = 0; i < n - 1; i++) {
233	7523	if (d == buf + buflen) {
234	1	errno = ENOMEM;
235	1	return (-1);
236		}
237	7522	*d++ = (u >> 16) & 0xff;
238	7522	u <<= 8;
239	7522	}
240	2536	dest += d - dest;
241	2536	return (1);
242	2537	}
243
244		ssize_t
245	162	base64_encode(const enum encoding enc, const enum case_e kase,
246		blob_dest_t buf, blob_len_t buflen,
247		blob_src_t inbuf, blob_len_t inlength)
248		{
249	162	const struct b64_alphabet *alpha = &b64_alphabet[enc];
250	162	char *p = buf;
251	162	const uint8_t in = (const uint8_t )inbuf;
252	162	const uint8_t * const end = in + inlength;
253
254	162	(void)kase;
255	162	AN(buf);
256	162	AN(alpha);
257	162	if (in == NULL \|\| inlength == 0)
258	100	return (0);
259
260	248	if ((enc == BASE64URLNOPAD &&
261	28	buflen < base64nopad_encode_l(inlength)) \|\|
262	192	(enc != BASE64URLNOPAD && buflen < base64_encode_l(inlength))) {
263	164	errno = ENOMEM;
264	164	return (-1);
265		}
266
267	3459	while (end - in >= 3) {
268	3349	*p++ = alpha->b64[(in[0] >> 2) & 0x3f];
269	3349	*p++ = alpha->b64[((in[0] << 4) \| (in[1] >> 4)) & 0x3f];
270	3349	*p++ = alpha->b64[((in[1] << 2) \| (in[2] >> 6)) & 0x3f];
271	3349	*p++ = alpha->b64[in[2] & 0x3f];
272	3349	in += 3;
273		}
274	110	if (end - in > 0) {
275	94	*p++ = alpha->b64[(in[0] >> 2) & 0x3f];
276	94	if (end - in == 1) {
277	72	*p++ = alpha->b64[(in[0] << 4) & 0x3f];
278	72	if (alpha->padding) {
279	53	*p++ = alpha->padding;
280	53	*p++ = alpha->padding;
281	53	}
282	72	}
283		else {
284	22	*p++ = alpha->b64[((in[0] << 4) \| (in[1] >> 4)) & 0x3f];
285	22	*p++ = alpha->b64[(in[1] << 2) & 0x3f];
286	22	if (alpha->padding) {
287	13	*p++ = alpha->padding;
288	13	}
289		}
290	94	}
291	110	assert(p >= buf);
292	110	assert(p <= buf + buflen);
293	110	return (p - buf);
294	114	}
295
296		ssize_t
297	127	base64_decode(const enum encoding dec, blob_dest_t buf,
298		blob_len_t buflen, ssize_t inlen, VCL_STRANDS strings)
299		{
300	127	const struct b64_alphabet *alpha = &b64_alphabet[dec];
301		const char *s;
302	127	char *dest = buf;
303	127	unsigned u = 0, term = 0;
304	127	size_t len = SIZE_MAX;
305	127	int n = 0, i;
306		char b;
307
308	127	AN(buf);
309	127	AN(alpha);
310	127	AN(strings);
311
312	127	if (inlen >= 0)
313	47	len = inlen;
314
315	288	for (i = 0; len > 0 && i < strings->n; i++) {
316	183	s = strings->p[i];
317
318	183	if (s == NULL)
319	6	continue;
320	177	if (*s && term) {
321	0	errno = EINVAL;
322	0	return (-1);
323		}
324	10319	while (*s && len) {
325	10164	b = alpha->i64[(uint8_t)*s];
326	10164	s++;
327	10164	len--;
328	10164	u <<= 6;
329	10164	if (b == ILL) {
330	21	errno = EINVAL;
331	21	return (-1);
332		}
333	10143	n++;
334	10143	if (b == PAD) {
335	60	term++;
336	60	continue;
337		}
338	10083	u \|= (uint8_t)b;
339	10083	if (n == 4) {
340	2488	if (decode(&dest, buf, buflen, u, n-term) < 0)
341	1	return (-1);
342	2487	n = 0;
343	2487	}
344		}
345	155	}
346	105	if (n) {
347	49	if (n - term != 0)
348	49	u <<= (6 * (4 - n));
349	49	if (decode(&dest, buf, buflen, u, n-term) < 0)
350	0	return (-1);
351	49	}
352
353	105	return (dest - buf);
354	127	}

0

/*-

1

 * Copyright 2015-2016 UPLEX - Nils Goroll Systemoptimierung

2

 * All rights reserved.

3

4

 * Authors: Nils Goroll <nils.goroll@uplex.de>

5

 *          Geoffrey Simmons <geoffrey.simmons@uplex.de>

6

7

 * SPDX-License-Identifier: BSD-2-Clause

8

9

 * Redistribution and use in source and binary forms, with or without

10

 * modification, are permitted provided that the following conditions are met:

11

 * 1. Redistributions of source code must retain the above copyright notice,

12

 *    this list of conditions and the following disclaimer.

13

 * 2. Redistributions in binary form must reproduce the above copyright notice,

14

 *    this list of conditions and the following disclaimer in the documentation

15

 *    and/or other materials provided with the distribution.

16

17

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY

18

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

19

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

20

 * DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY

21

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

22

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

23

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

24

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

25

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

26

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

27

28

*/

29

30

#include "config.h"

31

32

#include "vdef.h"

33

#include "vrt.h"

34

#include "vas.h"

35

36

#include "vmod_blob.h"

37

38

static const struct b64_alphabet {

39

        const char b64[64];

40

        const int8_t i64[256];

41

        const int padding;

42

} b64_alphabet[] = {

43

        [BASE64] = {

44

                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"

45

                "ghijklmnopqrstuvwxyz0123456789+/",

46

47

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

48

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

49

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

50

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

51

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

52

                        ILL, ILL, ILL,  62, ILL, ILL, ILL,  63, /* +, /    */

53

                         52,  53,  54,  55,  56,  57,  58,  59, /* 0 - 7   */

54

                         60,  61, ILL, ILL, ILL, PAD, ILL, ILL, /* 8, 9, = */

55

                        ILL,   0,   1,   2,   3,   4,   5,   6, /* A - G   */

56

                          7,   8,   9,  10,  11,  12,  13,  14, /* H - O   */

57

                         15,  16,  17,  18,  19,  20,  21,  22, /* P - W   */

58

                         23,  24,  25, ILL, ILL, ILL, ILL, ILL, /* X, Y, Z */

59

                        ILL,  26,  27,  28,  29,  30,  31,  32, /* a - g   */

60

                         33,  34,  35,  36,  37,  38,  39,  40, /* h - o   */

61

                         41,  42,  43,  44,  45,  46,  47,  48, /* p - w   */

62

                         49,  50,  51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */

63

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

64

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

65

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

66

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

67

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

68

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

69

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

70

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

71

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

72

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

73

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

74

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

75

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

76

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

77

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

78

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

79

},

80

'='

81

},

82

        [BASE64URL] = {

83

                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"

84

                "ghijklmnopqrstuvwxyz0123456789-_",

85

86

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

87

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

88

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

89

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

90

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

91

                        ILL, ILL, ILL, ILL, ILL,  62, ILL, ILL, /* -       */

92

                         52,  53,  54,  55,  56,  57,  58,  59, /* 0 - 7   */

93

                         60,  61, ILL, ILL, ILL, PAD, ILL, ILL, /* 8, 9, = */

94

                        ILL,   0,   1,   2,   3,   4,   5,   6, /* A - G   */

95

                          7,   8,   9,  10,  11,  12,  13,  14, /* H - O   */

96

                         15,  16,  17,  18,  19,  20,  21,  22, /* P - W   */

97

                         23,  24,  25, ILL, ILL, ILL, ILL,  63, /* X-Z, _  */

98

                        ILL,  26,  27,  28,  29,  30,  31,  32, /* a - g   */

99

                         33,  34,  35,  36,  37,  38,  39,  40, /* h - o   */

100

                         41,  42,  43,  44,  45,  46,  47,  48, /* p - w   */

101

                         49,  50,  51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */

102

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

103

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

104

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

105

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

106

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

107

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

108

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

109

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

110

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

111

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

112

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

113

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

114

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

115

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

116

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

117

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

118

},

119

'='

120

},

121

        [BASE64URLNOPAD] = {

122

                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"

123

                "ghijklmnopqrstuvwxyz0123456789-_",

124

125

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

126

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

127

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

128

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

129

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

130

                        ILL, ILL, ILL, ILL, ILL,  62, ILL, ILL, /* -       */

131

                         52,  53,  54,  55,  56,  57,  58,  59, /* 0 - 7   */

132

                         60,  61, ILL, ILL, ILL, ILL, ILL, ILL, /* 8, 9    */

133

                        ILL,   0,   1,   2,   3,   4,   5,   6, /* A - G   */

134

                          7,   8,   9,  10,  11,  12,  13,  14, /* H - O   */

135

                         15,  16,  17,  18,  19,  20,  21,  22, /* P - W   */

136

                         23,  24,  25, ILL, ILL, ILL, ILL,  63, /* X-Z, _  */

137

                        ILL,  26,  27,  28,  29,  30,  31,  32, /* a - g   */

138

                         33,  34,  35,  36,  37,  38,  39,  40, /* h - o   */

139

                         41,  42,  43,  44,  45,  46,  47,  48, /* p - w   */

140

                         49,  50,  51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */

141

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

142

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

143

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

144

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

145

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

146

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

147

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

148

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

149

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

150

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

151

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

152

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

153

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

154

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

155

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

156

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

157

},

158

159

},

160

        [BASE64CF] = {

161

                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"

162

                "ghijklmnopqrstuvwxyz0123456789-~",

163

164

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

165

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

166

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

167

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

168

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

169

                        ILL, ILL, ILL, ILL, ILL,  62, ILL, ILL, /* -          */

170

                         52,  53,  54,  55,  56,  57,  58,  59, /* 0 - 7      */

171

                         60,  61, ILL, ILL, ILL, ILL, ILL, ILL, /* 8, 9       */

172

                        ILL,   0,   1,   2,   3,   4,   5,   6, /* A - G      */

173

                          7,   8,   9,  10,  11,  12,  13,  14, /* H - O      */

174

                         15,  16,  17,  18,  19,  20,  21,  22, /* P - W      */

175

                         23,  24,  25, ILL, ILL, ILL, ILL, PAD, /* X, Y, Z, _ */

176

                        ILL,  26,  27,  28,  29,  30,  31,  32, /* a - g      */

177

                         33,  34,  35,  36,  37,  38,  39,  40, /* h - o      */

178

                         41,  42,  43,  44,  45,  46,  47,  48, /* p - w      */

179

                         49,  50,  51, ILL, ILL, ILL,  63, ILL, /* x, y, z,  ~*/

180

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

181

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

182

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

183

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

184

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

185

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

186

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

187

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

188

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

189

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

190

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

191

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

192

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

193

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

194

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

195

                        ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,

196

},

197

'_'

198

199

};

200

#define base64_l(l)             (((l) << 2) / 3)

201

202

size_t

203

35

base64nopad_encode_l(size_t l)

204

205

35

        return (base64_l(l) + 4);

206

207

208

size_t

209

99

base64_encode_l(size_t l)

210

211

99

        return ((((base64_l(l)) + 3) & ~3) + 1);

212

213

214

size_t

215

64

base64_decode_l(size_t l)

216

217

64

        return ((l * 3) >> 2);

218

219

220

static inline int

221

2537

decode(char *restrict *restrict dest, blob_src_t buf,

222

    blob_len_t buflen, unsigned u, const int n)

223

224

        char *d;

225

        int i;

226

227

2537

        if (n <= 1) {

228

0

                errno = EINVAL;

229

0

                return (-1);

230

231

2537

        d = *dest;

232

10059

        for (i = 0; i < n - 1; i++) {

233

7523

                if (d == buf + buflen) {

234

1

                        errno = ENOMEM;

235

1

                        return (-1);

236

237

7522

                *d++ = (u >> 16) & 0xff;

238

7522

                u <<= 8;

239

7522

240

2536

        *dest += d - *dest;

241

2536

        return (1);

242

2537

243

244

ssize_t

245

162

base64_encode(const enum encoding enc, const enum case_e kase,

246

    blob_dest_t buf, blob_len_t buflen,

247

    blob_src_t inbuf, blob_len_t inlength)

248

249

162

        const struct b64_alphabet *alpha = &b64_alphabet[enc];

250

162

        char *p = buf;

251

162

        const uint8_t *in = (const uint8_t *)inbuf;

252

162

        const uint8_t * const end = in + inlength;

253

254

162

        (void)kase;

255

162

        AN(buf);

256

162

        AN(alpha);

257

162

        if (in == NULL || inlength == 0)

258

100

                return (0);

259

260

248

        if ((enc == BASE64URLNOPAD &&

261

28

            buflen < base64nopad_encode_l(inlength)) ||

262

192

            (enc != BASE64URLNOPAD && buflen < base64_encode_l(inlength))) {

263

164

                errno = ENOMEM;

264

164

                return (-1);

265

266

267

3459

        while (end - in >= 3) {

268

3349

                *p++ = alpha->b64[(in[0] >> 2) & 0x3f];

269

3349

                *p++ = alpha->b64[((in[0] << 4) | (in[1] >> 4)) & 0x3f];

270

3349

                *p++ = alpha->b64[((in[1] << 2) | (in[2] >> 6)) & 0x3f];

271

3349

                *p++ = alpha->b64[in[2] & 0x3f];

272

3349

                in += 3;

273

274

110

        if (end - in > 0) {

275

94

                *p++ = alpha->b64[(in[0] >> 2) & 0x3f];

276

94

                if (end - in == 1) {

277

72

                        *p++ = alpha->b64[(in[0] << 4) & 0x3f];

278

72

                        if (alpha->padding) {

279

53

                                *p++ = alpha->padding;

280

53

                                *p++ = alpha->padding;

281

53

282

72

283

                else {

284

22

                        *p++ = alpha->b64[((in[0] << 4) | (in[1] >> 4)) & 0x3f];

285

22

                        *p++ = alpha->b64[(in[1] << 2) & 0x3f];

286

22

                        if (alpha->padding) {

287

13

                                *p++ = alpha->padding;

13

94

110

        assert(p >= buf);

292

110

        assert(p <= buf + buflen);

293

110

        return (p - buf);

294

114

295

296

ssize_t

297

127

base64_decode(const enum encoding dec, blob_dest_t buf,

298

    blob_len_t buflen, ssize_t inlen, VCL_STRANDS strings)

299

300

127

        const struct b64_alphabet *alpha = &b64_alphabet[dec];

301

        const char *s;

302

127

        char *dest = buf;

303

127

        unsigned u = 0, term = 0;

304

127

        size_t len = SIZE_MAX;

305

127

        int n = 0, i;

306

        char b;

307

308

127

        AN(buf);

309

127

        AN(alpha);

310

127

        AN(strings);

311

312

127

        if (inlen >= 0)

313

47

                len = inlen;

314

315

288

        for (i = 0; len > 0 && i < strings->n; i++) {

316

183

                s = strings->p[i];

317

318

183

                if (s == NULL)

319

6

                        continue;

320

177

                if (*s && term) {

321

0

                        errno = EINVAL;

322

0

                        return (-1);

323

324

10319

                while (*s && len) {

325

10164

                        b = alpha->i64[(uint8_t)*s];

326

10164

                        s++;

327

10164

                        len--;

328

10164

                        u <<= 6;

329

10164

                        if (b == ILL) {

330

21

                                errno = EINVAL;

331

21

                                return (-1);

332

333

10143

                        n++;

334

10143

                        if (b == PAD) {

335

60

                                term++;

336

60

                                continue;

337

338

10083

                        u |= (uint8_t)b;

339

10083

                        if (n == 4) {

340

2488

                                if (decode(&dest, buf, buflen, u, n-term) < 0)

341

1

                                        return (-1);

342

2487

                                n = 0;

2487

155

105

        if (n) {

347

49

                if (n - term != 0)

348

49

                        u <<= (6 * (4 - n));

349

49

                if (decode(&dest, buf, buflen, u, n-term) < 0)

350

0

                        return (-1);

351

49

352

353

105

        return (dest - buf);

354

127