GCOV - Varnish Cache

		vinyl-cache/vmod/vmod_blob_base64.c
0		/*-
1		* Copyright 2015-2016,2026 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	735	base64nopad_encode_l(size_t l)
205		{
206	735	return (base64_l(l) + 4);
207		}
208
209		size_t
210	2121	base64_encode_l(size_t l)
211		{
212	2121	return ((((base64_l(l)) + 3) & ~3) + 1);
213		}
214
215		size_t
216	1365	base64_decode_l(size_t l)
217		{
218	1365	return ((l * 3) >> 2);
219		}
220
221		static inline int
222	53487	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	53487	if (n <= 1) {
229	0	errno = EINVAL;
230	0	return (-1);
231		}
232	53487	d = *dest;
233	212016	for (i = 0; i < n - 1; i++) {
234	158550	if (d == buf + buflen) {
235	21	errno = ENOMEM;
236	21	return (-1);
237		}
238	158529	*d++ = (u >> 16) & 0xff;
239	158529	u <<= 8;
240	158529	}
241	53466	dest += d - dest;
242	53466	return (1);
243	53487	}
244
245		ssize_t
246	3444	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	3444	const struct b64_alphabet *alpha = &b64_alphabet[enc];
251	3444	char *p = buf;
252	3444	const uint8_t in = (const uint8_t )inbuf;
253	3444	const uint8_t * const end = in + inlength;
254
255	3444	(void)kase;
256	3444	AN(buf);
257	3444	AN(alpha);
258	3444	if (in == NULL \|\| inlength == 0)
259	2100	return (0);
260
261	5292	if ((enc == BASE64URLNOPAD &&
262	588	buflen < base64nopad_encode_l(inlength)) \|\|
263	4074	(enc != BASE64URLNOPAD && buflen < base64_encode_l(inlength))) {
264	3486	errno = ENOMEM;
265	3486	return (-1);
266		}
267
268	72639	while (end - in >= 3) {
269	70329	*p++ = alpha->b64[(in[0] >> 2) & 0x3f];
270	70329	*p++ = alpha->b64[((in[0] << 4) \| (in[1] >> 4)) & 0x3f];
271	70329	*p++ = alpha->b64[((in[1] << 2) \| (in[2] >> 6)) & 0x3f];
272	70329	*p++ = alpha->b64[in[2] & 0x3f];
273	70329	in += 3;
274		}
275	2310	if (end - in > 0) {
276	1974	*p++ = alpha->b64[(in[0] >> 2) & 0x3f];
277	1974	if (end - in == 1) {
278	1512	*p++ = alpha->b64[(in[0] << 4) & 0x3f];
279	1512	if (alpha->padding) {
280	1113	*p++ = alpha->padding;
281	1113	*p++ = alpha->padding;
282	1113	}
283	1512	}
284		else {
285	462	*p++ = alpha->b64[((in[0] << 4) \| (in[1] >> 4)) & 0x3f];
286	462	*p++ = alpha->b64[(in[1] << 2) & 0x3f];
287	462	if (alpha->padding) {
288	273	*p++ = alpha->padding;
289	273	}
290		}
291	1974	}
292	2310	assert(p >= buf);
293	2310	assert(p <= buf + buflen);
294	2310	return (p - buf);
295	2436	}
296
297		ssize_t
298	2814	base64_decode(const enum encoding dec, blob_dest_t buf,
299		blob_len_t buflen, ssize_t inlen, VCL_STRANDS strings, size_t *consumedp)
300		{
301	2814	const struct b64_alphabet *alpha = &b64_alphabet[dec];
302		const char *s;
303	2814	char *dest = buf;
304	2814	unsigned u = 0, term = 0;
305	2814	size_t len = SIZE_MAX;
306	2814	size_t consumed = 0;
307	2814	int n = 0, i;
308		char b;
309		ssize_t r;
310
311		/lint --e{801} goto used as defer pattern /
312
313	2814	AN(buf);
314	2814	AN(alpha);
315	2814	CHECK_OBJ_NOTNULL(strings, STRANDS_MAGIC);
316
317	2814	if (inlen >= 0)
318	987	len = inlen;
319
320	6384	for (i = 0; len > 0 && i < strings->n; i++) {
321	4116	s = strings->p[i];
322
323	4116	if (s == NULL)
324	168	continue;
325	218106	while (*s && len) {
326	214704	b = alpha->i64[(uint8_t)*s];
327	214704	s++;
328	214704	len--;
329	214704	u <<= 6;
330	214704	if (b == ILL) {
331	441	errno = EINVAL;
332	441	r = -1;
333	441	goto out;
334		}
335	214263	n++;
336	214263	if (b == PAD && term < 2) {
337	1428	term++;
338	1428	continue;
339		}
340	212835	if (term) {
341	84	errno = EINVAL;
342	84	r = -1;
343	84	goto out;
344		}
345	212751	u \|= (uint8_t)b;
346	212751	if (n == 4) {
347	52416	if (decode(&dest, buf, buflen, u, n) < 0) {
348	21	r = -1;
349	21	goto out;
350		}
351	52395	consumed += n;
352	52395	n = 0;
353	52395	}
354		}
355	3402	}
356	2268	if (n) {
357	1071	if (n - term != 0)
358	1071	u <<= (6 * (4 - n));
359	1071	if (decode(&dest, buf, buflen, u, n-term) < 0) {
360	0	r = -1;
361	0	goto out;
362		}
363	1071	consumed += n;
364	1071	}
365
366	2268	r = dest - buf;
367
368		out:
369	2814	if (consumedp)
370	1008	*consumedp = consumed;
371	2814	return (r);
372		}

0

/*-

1

 * Copyright 2015-2016,2026 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

735

base64nopad_encode_l(size_t l)

205

206

735

        return (base64_l(l) + 4);

207

208

209

size_t

210

2121

base64_encode_l(size_t l)

211

212

2121

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

213

214

215

size_t

216

1365

base64_decode_l(size_t l)

217

218

1365

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

219

220

221

static inline int

222

53487

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

53487

        if (n <= 1) {

229

0

                errno = EINVAL;

230

0

                return (-1);

231

232

53487

        d = *dest;

233

212016

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

234

158550

                if (d == buf + buflen) {

235

21

                        errno = ENOMEM;

236

21

                        return (-1);

237

238

158529

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

239

158529

                u <<= 8;

240

158529

241

53466

        *dest += d - *dest;

242

53466

        return (1);

243

53487

244

245

ssize_t

246

3444

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

3444

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

251

3444

        char *p = buf;

252

3444

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

253

3444

        const uint8_t * const end = in + inlength;

254

255

3444

        (void)kase;

256

3444

        AN(buf);

257

3444

        AN(alpha);

258

3444

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

259

2100

                return (0);

260

261

5292

        if ((enc == BASE64URLNOPAD &&

262

588

            buflen < base64nopad_encode_l(inlength)) ||

263

4074

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

264

3486

                errno = ENOMEM;

265

3486

                return (-1);

266

267

268

72639

        while (end - in >= 3) {

269

70329

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

270

70329

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

271

70329

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

272

70329

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

273

70329

                in += 3;

274

275

2310

        if (end - in > 0) {

276

1974

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

277

1974

                if (end - in == 1) {

278

1512

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

279

1512

                        if (alpha->padding) {

280

1113

                                *p++ = alpha->padding;

281

1113

                                *p++ = alpha->padding;

282

1113

283

1512

284

                else {

285

462

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

286

462

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

287

462

                        if (alpha->padding) {

288

273

                                *p++ = alpha->padding;

273

1974

2310

        assert(p >= buf);

293

2310

        assert(p <= buf + buflen);

294

2310

        return (p - buf);

295

2436

296

297

ssize_t

298

2814

base64_decode(const enum encoding dec, blob_dest_t buf,

299

    blob_len_t buflen, ssize_t inlen, VCL_STRANDS strings, size_t *consumedp)

300

301

2814

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

302

        const char *s;

303

2814

        char *dest = buf;

304

2814

        unsigned u = 0, term = 0;

305

2814

        size_t len = SIZE_MAX;

306

2814

        size_t consumed = 0;

307

2814

        int n = 0, i;

308

        char b;

309

        ssize_t r;

310

311

        /*lint --e{801} goto used as defer pattern */

312

313

2814

        AN(buf);

314

2814

        AN(alpha);

315

2814

        CHECK_OBJ_NOTNULL(strings, STRANDS_MAGIC);

316

317

2814

        if (inlen >= 0)

318

987

                len = inlen;

319

320

6384

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

321

4116

                s = strings->p[i];

322

323

4116

                if (s == NULL)

324

168

                        continue;

325

218106

                while (*s && len) {

326

214704

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

327

214704

                        s++;

328

214704

                        len--;

329

214704

                        u <<= 6;

330

214704

                        if (b == ILL) {

331

441

                                errno = EINVAL;

332

441

                                r = -1;

333

441

                                goto out;

334

335

214263

                        n++;

336

214263

                        if (b == PAD && term < 2) {

337

1428

                                term++;

338

1428

                                continue;

339

340

212835

                        if (term) {

341

84

                                errno = EINVAL;

342

84

                                r = -1;

343

84

                                goto out;

344

345

212751

                        u |= (uint8_t)b;

346

212751

                        if (n == 4) {

347

52416

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

348

21

                                        r = -1;

349

21

                                        goto out;

350

351

52395

                                consumed += n;

352

52395

                                n = 0;

52395

3402

2268

        if (n) {

357

1071

                if (n - term != 0)

358

1071

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

359

1071

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

360

0

                        r = -1;

361

0

                        goto out;

362

363

1071

                consumed += n;

364

1071

365

366

2268

        r = dest - buf;

367

368

    out:

369

2814

        if (consumedp)

370

1008

                *consumedp = consumed;

371

2814

        return (r);

372