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		#include "miniobj.h"
36
37		#include "vmod_blob.h"
38
39		static const struct b64_alphabet {
40		const char b64[65];
41		const int8_t i64[256];
42		const int padding;
43		} b64_alphabet[] = {
44		[BASE64] = {
45		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"
46		"ghijklmnopqrstuvwxyz0123456789+/",
47		{
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, ILL, ILL, ILL, ILL, ILL,
53		ILL, ILL, ILL, 62, ILL, ILL, ILL, 63, /* +, / */
54		52, 53, 54, 55, 56, 57, 58, 59, /* 0 - 7 */
55		60, 61, ILL, ILL, ILL, PAD, ILL, ILL, /* 8, 9, = */
56		ILL, 0, 1, 2, 3, 4, 5, 6, /* A - G */
57		7, 8, 9, 10, 11, 12, 13, 14, /* H - O */
58		15, 16, 17, 18, 19, 20, 21, 22, /* P - W */
59		23, 24, 25, ILL, ILL, ILL, ILL, ILL, /* X, Y, Z */
60		ILL, 26, 27, 28, 29, 30, 31, 32, /* a - g */
61		33, 34, 35, 36, 37, 38, 39, 40, /* h - o */
62		41, 42, 43, 44, 45, 46, 47, 48, /* p - w */
63		49, 50, 51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */
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		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
80		},
81		'='
82		},
83		[BASE64URL] = {
84		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"
85		"ghijklmnopqrstuvwxyz0123456789-_",
86		{
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, ILL, ILL, ILL,
92		ILL, ILL, ILL, ILL, ILL, 62, ILL, ILL, /* - */
93		52, 53, 54, 55, 56, 57, 58, 59, /* 0 - 7 */
94		60, 61, ILL, ILL, ILL, PAD, ILL, ILL, /* 8, 9, = */
95		ILL, 0, 1, 2, 3, 4, 5, 6, /* A - G */
96		7, 8, 9, 10, 11, 12, 13, 14, /* H - O */
97		15, 16, 17, 18, 19, 20, 21, 22, /* P - W */
98		23, 24, 25, ILL, ILL, ILL, ILL, 63, /* X-Z, _ */
99		ILL, 26, 27, 28, 29, 30, 31, 32, /* a - g */
100		33, 34, 35, 36, 37, 38, 39, 40, /* h - o */
101		41, 42, 43, 44, 45, 46, 47, 48, /* p - w */
102		49, 50, 51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */
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		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
119		},
120		'='
121		},
122		[BASE64URLNOPAD] = {
123		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"
124		"ghijklmnopqrstuvwxyz0123456789-_",
125		{
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, ILL, ILL, ILL,
131		ILL, ILL, ILL, ILL, ILL, 62, ILL, ILL, /* - */
132		52, 53, 54, 55, 56, 57, 58, 59, /* 0 - 7 */
133		60, 61, ILL, ILL, ILL, ILL, ILL, ILL, /* 8, 9 */
134		ILL, 0, 1, 2, 3, 4, 5, 6, /* A - G */
135		7, 8, 9, 10, 11, 12, 13, 14, /* H - O */
136		15, 16, 17, 18, 19, 20, 21, 22, /* P - W */
137		23, 24, 25, ILL, ILL, ILL, ILL, 63, /* X-Z, _ */
138		ILL, 26, 27, 28, 29, 30, 31, 32, /* a - g */
139		33, 34, 35, 36, 37, 38, 39, 40, /* h - o */
140		41, 42, 43, 44, 45, 46, 47, 48, /* p - w */
141		49, 50, 51, ILL, ILL, ILL, ILL, ILL, /* x, y, z */
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		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
158		},
159		0
160		},
161		[BASE64CF] = {
162		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"
163		"ghijklmnopqrstuvwxyz0123456789-~",
164		{
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, ILL, ILL, ILL,
170		ILL, ILL, ILL, ILL, ILL, 62, ILL, ILL, /* - */
171		52, 53, 54, 55, 56, 57, 58, 59, /* 0 - 7 */
172		60, 61, ILL, ILL, ILL, ILL, ILL, ILL, /* 8, 9 */
173		ILL, 0, 1, 2, 3, 4, 5, 6, /* A - G */
174		7, 8, 9, 10, 11, 12, 13, 14, /* H - O */
175		15, 16, 17, 18, 19, 20, 21, 22, /* P - W */
176		23, 24, 25, ILL, ILL, ILL, ILL, PAD, /* X, Y, Z, _ */
177		ILL, 26, 27, 28, 29, 30, 31, 32, /* a - g */
178		33, 34, 35, 36, 37, 38, 39, 40, /* h - o */
179		41, 42, 43, 44, 45, 46, 47, 48, /* p - w */
180		49, 50, 51, ILL, ILL, ILL, 63, ILL, /* x, y, z, ~*/
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		ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
197		},
198		'_'
199		}
200		};
201		#define base64_l(l) (((l) << 2) / 3)
202
203		size_t
204	245	base64nopad_encode_l(size_t l)
205		{
206	245	return (base64_l(l) + 4);
207		}
208
209		size_t
210	693	base64_encode_l(size_t l)
211		{
212	693	return ((((base64_l(l)) + 3) & ~3) + 1);
213		}
214
215		size_t
216	448	base64_decode_l(size_t l)
217		{
218	448	return ((l * 3) >> 2);
219		}
220
221		static inline int
222	17759	decode(char restrict restrict dest, blob_src_t buf,
223		blob_len_t buflen, unsigned u, const int n)
224		{
225		char *d;
226		int i;
227
228	17759	if (n <= 1) {
229	0	errno = EINVAL;
230	0	return (-1);
231		}
232	17759	d = *dest;
233	70413	for (i = 0; i < n - 1; i++) {
234	52661	if (d == buf + buflen) {
235	7	errno = ENOMEM;
236	7	return (-1);
237		}
238	52654	*d++ = (u >> 16) & 0xff;
239	52654	u <<= 8;
240	52654	}
241	17752	dest += d - dest;
242	17752	return (1);
243	17759	}
244
245		ssize_t
246	1134	base64_encode(const enum encoding enc, const enum case_e kase,
247		blob_dest_t buf, blob_len_t buflen,
248		blob_src_t inbuf, blob_len_t inlength)
249		{
250	1134	const struct b64_alphabet *alpha = &b64_alphabet[enc];
251	1134	char *p = buf;
252	1134	const uint8_t in = (const uint8_t )inbuf;
253	1134	const uint8_t * const end = in + inlength;
254
255	1134	(void)kase;
256	1134	AN(buf);
257	1134	AN(alpha);
258	1134	if (in == NULL \|\| inlength == 0)
259	700	return (0);
260
261	1736	if ((enc == BASE64URLNOPAD &&
262	196	buflen < base64nopad_encode_l(inlength)) \|\|
263	1344	(enc != BASE64URLNOPAD && buflen < base64_encode_l(inlength))) {
264	1148	errno = ENOMEM;
265	1148	return (-1);
266		}
267
268	24213	while (end - in >= 3) {
269	23443	*p++ = alpha->b64[(in[0] >> 2) & 0x3f];
270	23443	*p++ = alpha->b64[((in[0] << 4) \| (in[1] >> 4)) & 0x3f];
271	23443	*p++ = alpha->b64[((in[1] << 2) \| (in[2] >> 6)) & 0x3f];
272	23443	*p++ = alpha->b64[in[2] & 0x3f];
273	23443	in += 3;
274		}
275	770	if (end - in > 0) {
276	658	*p++ = alpha->b64[(in[0] >> 2) & 0x3f];
277	658	if (end - in == 1) {
278	504	*p++ = alpha->b64[(in[0] << 4) & 0x3f];
279	504	if (alpha->padding) {
280	371	*p++ = alpha->padding;
281	371	*p++ = alpha->padding;
282	371	}
283	504	}
284		else {
285	154	*p++ = alpha->b64[((in[0] << 4) \| (in[1] >> 4)) & 0x3f];
286	154	*p++ = alpha->b64[(in[1] << 2) & 0x3f];
287	154	if (alpha->padding) {
288	91	*p++ = alpha->padding;
289	91	}
290		}
291	658	}
292	770	assert(p >= buf);
293	770	assert(p <= buf + buflen);
294	770	return (p - buf);
295	798	}
296
297		ssize_t
298	889	base64_decode(const enum encoding dec, blob_dest_t buf,
299		blob_len_t buflen, ssize_t inlen, VCL_STRANDS strings)
300		{
301	889	const struct b64_alphabet *alpha = &b64_alphabet[dec];
302		const char *s;
303	889	char *dest = buf;
304	889	unsigned u = 0, term = 0;
305	889	size_t len = SIZE_MAX;
306	889	int n = 0, i;
307		char b;
308
309	889	AN(buf);
310	889	AN(alpha);
311	889	CHECK_OBJ_NOTNULL(strings, STRANDS_MAGIC);
312
313	889	if (inlen >= 0)
314	329	len = inlen;
315
316	2016	for (i = 0; len > 0 && i < strings->n; i++) {
317	1281	s = strings->p[i];
318
319	1281	if (s == NULL)
320	42	continue;
321	1239	if (*s && term) {
322	0	errno = EINVAL;
323	0	return (-1);
324		}
325	72233	while (*s && len) {
326	71148	b = alpha->i64[(uint8_t)*s];
327	71148	s++;
328	71148	len--;
329	71148	u <<= 6;
330	71148	if (b == ILL) {
331	147	errno = EINVAL;
332	147	return (-1);
333		}
334	71001	n++;
335	71001	if (b == PAD) {
336	420	term++;
337	420	continue;
338		}
339	70581	u \|= (uint8_t)b;
340	70581	if (n == 4) {
341	17416	if (decode(&dest, buf, buflen, u, n-term) < 0)
342	7	return (-1);
343	17409	n = 0;
344	17409	}
345		}
346	1085	}
347	735	if (n) {
348	343	if (n - term != 0)
349	343	u <<= (6 * (4 - n));
350	343	if (decode(&dest, buf, buflen, u, n-term) < 0)
351	0	return (-1);
352	343	}
353
354	735	return (dest - buf);
355	889	}

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

#include "miniobj.h"

36

37

#include "vmod_blob.h"

38

39

static const struct b64_alphabet {

40

        const char b64[65];

41

        const int8_t i64[256];

42

        const int padding;

43

} b64_alphabet[] = {

44

        [BASE64] = {

45

                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"

46

                "ghijklmnopqrstuvwxyz0123456789+/",

47

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, ILL, ILL, ILL, ILL, ILL,

53

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

54

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

55

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

56

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

57

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

58

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

59

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

60

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

61

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

62

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

63

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

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

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

80

},

81

'='

82

},

83

        [BASE64URL] = {

84

                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"

85

                "ghijklmnopqrstuvwxyz0123456789-_",

86

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, ILL, ILL, ILL,

92

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

93

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

94

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

95

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

96

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

97

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

98

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

99

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

100

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

101

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

102

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

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

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

119

},

120

'='

121

},

122

        [BASE64URLNOPAD] = {

123

                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"

124

                "ghijklmnopqrstuvwxyz0123456789-_",

125

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, ILL, ILL, ILL,

131

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

132

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

133

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

134

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

135

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

136

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

137

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

138

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

139

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

140

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

141

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

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

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

158

},

159

160

},

161

        [BASE64CF] = {

162

                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdef"

163

                "ghijklmnopqrstuvwxyz0123456789-~",

164

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, ILL, ILL, ILL,

170

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

171

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

172

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

173

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

174

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

175

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

176

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

177

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

178

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

179

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

180

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

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

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

197

},

198

'_'

199

200

};

201

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

202

203

size_t

204

245

base64nopad_encode_l(size_t l)

205

206

245

        return (base64_l(l) + 4);

207

208

209

size_t

210

693

base64_encode_l(size_t l)

211

212

693

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

213

214

215

size_t

216

448

base64_decode_l(size_t l)

217

218

448

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

219

220

221

static inline int

222

17759

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

223

    blob_len_t buflen, unsigned u, const int n)

224

225

        char *d;

226

        int i;

227

228

17759

        if (n <= 1) {

229

0

                errno = EINVAL;

230

0

                return (-1);

231

232

17759

        d = *dest;

233

70413

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

234

52661

                if (d == buf + buflen) {

235

7

                        errno = ENOMEM;

236

7

                        return (-1);

237

238

52654

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

239

52654

                u <<= 8;

240

52654

241

17752

        *dest += d - *dest;

242

17752

        return (1);

243

17759

244

245

ssize_t

246

1134

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

247

    blob_dest_t buf, blob_len_t buflen,

248

    blob_src_t inbuf, blob_len_t inlength)

249

250

1134

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

251

1134

        char *p = buf;

252

1134

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

253

1134

        const uint8_t * const end = in + inlength;

254

255

1134

        (void)kase;

256

1134

        AN(buf);

257

1134

        AN(alpha);

258

1134

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

259

700

                return (0);

260

261

1736

        if ((enc == BASE64URLNOPAD &&

262

196

            buflen < base64nopad_encode_l(inlength)) ||

263

1344

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

264

1148

                errno = ENOMEM;

265

1148

                return (-1);

266

267

268

24213

        while (end - in >= 3) {

269

23443

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

270

23443

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

271

23443

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

272

23443

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

273

23443

                in += 3;

274

275

770

        if (end - in > 0) {

276

658

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

277

658

                if (end - in == 1) {

278

504

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

279

504

                        if (alpha->padding) {

280

371

                                *p++ = alpha->padding;

281

371

                                *p++ = alpha->padding;

282

371

283

504

284

                else {

285

154

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

286

154

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

287

154

                        if (alpha->padding) {

288

91

                                *p++ = alpha->padding;

91

658

770

        assert(p >= buf);

293

770

        assert(p <= buf + buflen);

294

770

        return (p - buf);

295

798

296

297

ssize_t

298

889

base64_decode(const enum encoding dec, blob_dest_t buf,

299

    blob_len_t buflen, ssize_t inlen, VCL_STRANDS strings)

300

301

889

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

302

        const char *s;

303

889

        char *dest = buf;

304

889

        unsigned u = 0, term = 0;

305

889

        size_t len = SIZE_MAX;

306

889

        int n = 0, i;

307

        char b;

308

309

889

        AN(buf);

310

889

        AN(alpha);

311

889

        CHECK_OBJ_NOTNULL(strings, STRANDS_MAGIC);

312

313

889

        if (inlen >= 0)

314

329

                len = inlen;

315

316

2016

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

317

1281

                s = strings->p[i];

318

319

1281

                if (s == NULL)

320

42

                        continue;

321

1239

                if (*s && term) {

322

0

                        errno = EINVAL;

323

0

                        return (-1);

324

325

72233

                while (*s && len) {

326

71148

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

327

71148

                        s++;

328

71148

                        len--;

329

71148

                        u <<= 6;

330

71148

                        if (b == ILL) {

331

147

                                errno = EINVAL;

332

147

                                return (-1);

333

334

71001

                        n++;

335

71001

                        if (b == PAD) {

336

420

                                term++;

337

420

                                continue;

338

339

70581

                        u |= (uint8_t)b;

340

70581

                        if (n == 4) {

341

17416

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

342

7

                                        return (-1);

343

17409

                                n = 0;

17409

1085

735

        if (n) {

348

343

                if (n - term != 0)

349

343

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

350

343

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

351

0

                        return (-1);

352

343

353

354

735

        return (dest - buf);

355

889