/src/libscca/libuna/libuna_base64_stream.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Base64 stream functions |
3 | | * |
4 | | * Copyright (C) 2008-2024, Joachim Metz <joachim.metz@gmail.com> |
5 | | * |
6 | | * Refer to AUTHORS for acknowledgements. |
7 | | * |
8 | | * This program is free software: you can redistribute it and/or modify |
9 | | * it under the terms of the GNU Lesser General Public License as published by |
10 | | * the Free Software Foundation, either version 3 of the License, or |
11 | | * (at your option) any later version. |
12 | | * |
13 | | * This program is distributed in the hope that it will be useful, |
14 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | | * GNU General Public License for more details. |
17 | | * |
18 | | * You should have received a copy of the GNU Lesser General Public License |
19 | | * along with this program. If not, see <https://www.gnu.org/licenses/>. |
20 | | */ |
21 | | |
22 | | #include <common.h> |
23 | | #include <byte_stream.h> |
24 | | #include <types.h> |
25 | | |
26 | | #include "libuna_base64_stream.h" |
27 | | #include "libuna_definitions.h" |
28 | | #include "libuna_libcerror.h" |
29 | | #include "libuna_types.h" |
30 | | |
31 | | static uint8_t libuna_base64_sixtet_to_character_table[ 64 ] = { |
32 | | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', |
33 | | 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', |
34 | | 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', |
35 | | 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' }; |
36 | | |
37 | | static uint8_t libuna_base64url_sixtet_to_character_table[ 64 ] = { |
38 | | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', |
39 | | 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', |
40 | | 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', |
41 | | 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-', '_' }; |
42 | | |
43 | | /* Copies a base64 character to a base64 sixtet |
44 | | * Returns 1 if successful, 0 if not a valid base64 character or -1 on error |
45 | | */ |
46 | | int libuna_base64_character_copy_to_sixtet( |
47 | | uint32_t base64_character, |
48 | | uint8_t *base64_sixtet, |
49 | | uint32_t base64_variant, |
50 | | libcerror_error_t **error ) |
51 | 1.16M | { |
52 | 1.16M | static char *function = "libuna_base64_character_copy_to_sixtet"; |
53 | 1.16M | uint32_t safe_base64_sixtet = 0; |
54 | 1.16M | uint8_t base64_character_62 = 0; |
55 | 1.16M | uint8_t base64_character_63 = 0; |
56 | | |
57 | 1.16M | if( base64_sixtet == NULL ) |
58 | 0 | { |
59 | 0 | libcerror_error_set( |
60 | 0 | error, |
61 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
62 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
63 | 0 | "%s: invalid base64 sixtet.", |
64 | 0 | function ); |
65 | |
|
66 | 0 | return( -1 ); |
67 | 0 | } |
68 | 1.16M | switch( base64_variant & 0x000f0000UL ) |
69 | 1.16M | { |
70 | 1.16M | case LIBUNA_BASE64_VARIANT_ALPHABET_NORMAL: |
71 | 1.16M | base64_character_62 = (uint8_t) '+'; |
72 | 1.16M | base64_character_63 = (uint8_t) '/'; |
73 | 1.16M | break; |
74 | | |
75 | 0 | case LIBUNA_BASE64_VARIANT_ALPHABET_URL: |
76 | 0 | base64_character_62 = (uint8_t) '-'; |
77 | 0 | base64_character_63 = (uint8_t) '_'; |
78 | 0 | break; |
79 | | |
80 | 0 | default: |
81 | 0 | libcerror_error_set( |
82 | 0 | error, |
83 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
84 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
85 | 0 | "%s: unsupported base64 variant.", |
86 | 0 | function ); |
87 | |
|
88 | 0 | return( -1 ); |
89 | 1.16M | } |
90 | 1.16M | if( ( base64_character & 0xffffff00UL ) != 0 ) |
91 | 0 | { |
92 | 0 | return( 0 ); |
93 | 0 | } |
94 | | /* A-Z is not a continous range on an EBCDIC based system |
95 | | * it consists of the ranges: A-I, J-R, S-Z |
96 | | */ |
97 | 1.16M | if( ( base64_character >= (uint32_t) 'A' ) |
98 | 1.16M | && ( base64_character <= (uint32_t) 'I' ) ) |
99 | 1.04M | { |
100 | 1.04M | safe_base64_sixtet = base64_character - (uint32_t) 'A'; |
101 | 1.04M | } |
102 | 125k | else if( ( base64_character >= (uint32_t) 'J' ) |
103 | 125k | && ( base64_character <= (uint32_t) 'R' ) ) |
104 | 6.72k | { |
105 | 6.72k | safe_base64_sixtet = base64_character - (uint32_t) 'J' + 9; |
106 | 6.72k | } |
107 | 119k | else if( ( base64_character >= (uint32_t) 'S' ) |
108 | 119k | && ( base64_character <= (uint32_t) 'Z' ) ) |
109 | 5.68k | { |
110 | 5.68k | safe_base64_sixtet = base64_character - (uint32_t) 'S' + 18; |
111 | 5.68k | } |
112 | | /* a-z is not a continous range on an EBCDIC based system |
113 | | * it consists of the ranges: a-i, j-r, s-z |
114 | | */ |
115 | 113k | else if( ( base64_character >= (uint32_t) 'a' ) |
116 | 113k | && ( base64_character <= (uint32_t) 'i' ) ) |
117 | 33.1k | { |
118 | 33.1k | safe_base64_sixtet = base64_character - (uint32_t) 'a' + 26; |
119 | 33.1k | } |
120 | 80.2k | else if( ( base64_character >= (uint32_t) 'j' ) |
121 | 80.2k | && ( base64_character <= (uint32_t) 'r' ) ) |
122 | 11.1k | { |
123 | 11.1k | safe_base64_sixtet = base64_character - (uint32_t) 'j' + 35; |
124 | 11.1k | } |
125 | 69.1k | else if( ( base64_character >= (uint32_t) 's' ) |
126 | 69.1k | && ( base64_character <= (uint32_t) 'z' ) ) |
127 | 9.84k | { |
128 | 9.84k | safe_base64_sixtet = base64_character - (uint32_t) 's' + 44; |
129 | 9.84k | } |
130 | 59.3k | else if( ( base64_character >= (uint32_t) '0' ) |
131 | 59.3k | && ( base64_character <= (uint32_t) '9' ) ) |
132 | 11.0k | { |
133 | 11.0k | safe_base64_sixtet = base64_character - (uint32_t) '0' + 52; |
134 | 11.0k | } |
135 | 48.2k | else if( base64_character == base64_character_62 ) |
136 | 2.06k | { |
137 | 2.06k | safe_base64_sixtet = 62; |
138 | 2.06k | } |
139 | 46.2k | else if( base64_character == base64_character_63 ) |
140 | 46.1k | { |
141 | 46.1k | safe_base64_sixtet = 63; |
142 | 46.1k | } |
143 | 38 | else |
144 | 38 | { |
145 | 38 | return( 0 ); |
146 | 38 | } |
147 | 1.16M | *base64_sixtet = (uint8_t) ( safe_base64_sixtet & 0xff ); |
148 | | |
149 | 1.16M | return( 1 ); |
150 | 1.16M | } |
151 | | |
152 | | /* Copies a base64 triplet from a base64 stream |
153 | | * |
154 | | * The padding size will still be set to indicate the number of |
155 | | * sixtets in the triplet |
156 | | * |
157 | | * Returns 1 if successful or -1 on error |
158 | | */ |
159 | | int libuna_base64_triplet_copy_from_base64_stream( |
160 | | uint32_t *base64_triplet, |
161 | | const uint8_t *base64_stream, |
162 | | size_t base64_stream_size, |
163 | | size_t *base64_stream_index, |
164 | | uint8_t *padding_size, |
165 | | uint32_t base64_variant, |
166 | | libcerror_error_t **error ) |
167 | 292k | { |
168 | 292k | static char *function = "libuna_base64_triplet_copy_from_base64_stream"; |
169 | 292k | size_t base64_character_size = 0; |
170 | 292k | size_t safe_base64_stream_index = 0; |
171 | 292k | uint32_t base64_character = 0; |
172 | 292k | uint32_t safe_base64_triplet = 0; |
173 | 292k | uint8_t safe_padding_size = 0; |
174 | 292k | uint8_t sixtet1 = 0; |
175 | 292k | uint8_t sixtet2 = 0; |
176 | 292k | uint8_t sixtet3 = 0; |
177 | 292k | uint8_t sixtet4 = 0; |
178 | 292k | int result = 0; |
179 | | |
180 | 292k | if( base64_triplet == NULL ) |
181 | 0 | { |
182 | 0 | libcerror_error_set( |
183 | 0 | error, |
184 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
185 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
186 | 0 | "%s: invalid base64 triplet.", |
187 | 0 | function ); |
188 | |
|
189 | 0 | return( -1 ); |
190 | 0 | } |
191 | 292k | if( base64_stream == NULL ) |
192 | 0 | { |
193 | 0 | libcerror_error_set( |
194 | 0 | error, |
195 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
196 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
197 | 0 | "%s: invalid base64 stream.", |
198 | 0 | function ); |
199 | |
|
200 | 0 | return( -1 ); |
201 | 0 | } |
202 | 292k | if( base64_stream_size > (size_t) SSIZE_MAX ) |
203 | 0 | { |
204 | 0 | libcerror_error_set( |
205 | 0 | error, |
206 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
207 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
208 | 0 | "%s: invalid base64 stream size value exceeds maximum.", |
209 | 0 | function ); |
210 | |
|
211 | 0 | return( -1 ); |
212 | 0 | } |
213 | 292k | if( base64_stream_index == NULL ) |
214 | 0 | { |
215 | 0 | libcerror_error_set( |
216 | 0 | error, |
217 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
218 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
219 | 0 | "%s: invalid base64 stream index.", |
220 | 0 | function ); |
221 | |
|
222 | 0 | return( -1 ); |
223 | 0 | } |
224 | 292k | if( padding_size == NULL ) |
225 | 0 | { |
226 | 0 | libcerror_error_set( |
227 | 0 | error, |
228 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
229 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
230 | 0 | "%s: invalid padding size.", |
231 | 0 | function ); |
232 | |
|
233 | 0 | return( -1 ); |
234 | 0 | } |
235 | 292k | switch( base64_variant & 0x0f000000UL ) |
236 | 292k | { |
237 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_NONE: |
238 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_OPTIONAL: |
239 | 292k | case LIBUNA_BASE64_VARIANT_PADDING_REQUIRED: |
240 | 292k | case LIBUNA_BASE64_VARIANT_PADDING_INVALID: |
241 | 292k | break; |
242 | | |
243 | 0 | default: |
244 | 0 | libcerror_error_set( |
245 | 0 | error, |
246 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
247 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
248 | 0 | "%s: unsupported base64 variant.", |
249 | 0 | function ); |
250 | |
|
251 | 0 | return( -1 ); |
252 | 292k | } |
253 | 292k | switch( base64_variant & 0xf0000000UL ) |
254 | 292k | { |
255 | 292k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
256 | 292k | base64_character_size = 1; |
257 | 292k | break; |
258 | | |
259 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
260 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
261 | 0 | base64_character_size = 2; |
262 | 0 | break; |
263 | | |
264 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
265 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
266 | 0 | base64_character_size = 4; |
267 | 0 | break; |
268 | | |
269 | 0 | default: |
270 | 0 | libcerror_error_set( |
271 | 0 | error, |
272 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
273 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
274 | 0 | "%s: unsupported base64 variant.", |
275 | 0 | function ); |
276 | |
|
277 | 0 | return( -1 ); |
278 | 292k | } |
279 | 292k | safe_base64_stream_index = *base64_stream_index; |
280 | | |
281 | 292k | if( ( base64_character_size > base64_stream_size ) |
282 | 292k | || ( safe_base64_stream_index > ( base64_stream_size - base64_character_size ) ) ) |
283 | 0 | { |
284 | 0 | libcerror_error_set( |
285 | 0 | error, |
286 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
287 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
288 | 0 | "%s: base64 stream string too small - missing 1st base64 character.", |
289 | 0 | function ); |
290 | |
|
291 | 0 | return( -1 ); |
292 | 0 | } |
293 | 292k | switch( base64_variant & 0xf0000000UL ) |
294 | 292k | { |
295 | 292k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
296 | 292k | base64_character = base64_stream[ safe_base64_stream_index ]; |
297 | 292k | break; |
298 | | |
299 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
300 | 0 | byte_stream_copy_to_uint16_big_endian( |
301 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
302 | 0 | base64_character ); |
303 | 0 | break; |
304 | | |
305 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
306 | 0 | byte_stream_copy_to_uint16_little_endian( |
307 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
308 | 0 | base64_character ); |
309 | 0 | break; |
310 | | |
311 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
312 | 0 | byte_stream_copy_to_uint32_big_endian( |
313 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
314 | 0 | base64_character ); |
315 | 0 | break; |
316 | | |
317 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
318 | 0 | byte_stream_copy_to_uint32_little_endian( |
319 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
320 | 0 | base64_character ); |
321 | 0 | break; |
322 | 292k | } |
323 | 292k | safe_base64_stream_index += base64_character_size; |
324 | | |
325 | 292k | result = libuna_base64_character_copy_to_sixtet( |
326 | 292k | base64_character, |
327 | 292k | &sixtet1, |
328 | 292k | base64_variant, |
329 | 292k | error ); |
330 | | |
331 | 292k | if( result == -1 ) |
332 | 0 | { |
333 | 0 | libcerror_error_set( |
334 | 0 | error, |
335 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
336 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
337 | 0 | "%s: unable to copy base64 character to 1st sixtet.", |
338 | 0 | function ); |
339 | |
|
340 | 0 | return( -1 ); |
341 | 0 | } |
342 | 292k | else if( result == 0 ) |
343 | 4 | { |
344 | 4 | libcerror_error_set( |
345 | 4 | error, |
346 | 4 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
347 | 4 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
348 | 4 | "%s: invalid 1st base64 character.", |
349 | 4 | function ); |
350 | | |
351 | 4 | return( -1 ); |
352 | 4 | } |
353 | 292k | if( ( base64_character_size > base64_stream_size ) |
354 | 292k | || ( safe_base64_stream_index > ( base64_stream_size - base64_character_size ) ) ) |
355 | 8 | { |
356 | 8 | libcerror_error_set( |
357 | 8 | error, |
358 | 8 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
359 | 8 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
360 | 8 | "%s: base64 stream string too small - missing 2nd base64 character.", |
361 | 8 | function ); |
362 | | |
363 | 8 | return( -1 ); |
364 | 8 | } |
365 | 292k | switch( base64_variant & 0xf0000000UL ) |
366 | 292k | { |
367 | 292k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
368 | 292k | base64_character = base64_stream[ safe_base64_stream_index ]; |
369 | 292k | break; |
370 | | |
371 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
372 | 0 | byte_stream_copy_to_uint16_big_endian( |
373 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
374 | 0 | base64_character ); |
375 | 0 | break; |
376 | | |
377 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
378 | 0 | byte_stream_copy_to_uint16_little_endian( |
379 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
380 | 0 | base64_character ); |
381 | 0 | break; |
382 | | |
383 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
384 | 0 | byte_stream_copy_to_uint32_big_endian( |
385 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
386 | 0 | base64_character ); |
387 | 0 | break; |
388 | | |
389 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
390 | 0 | byte_stream_copy_to_uint32_little_endian( |
391 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
392 | 0 | base64_character ); |
393 | 0 | break; |
394 | 292k | } |
395 | 292k | safe_base64_stream_index += base64_character_size; |
396 | | |
397 | 292k | result = libuna_base64_character_copy_to_sixtet( |
398 | 292k | base64_character, |
399 | 292k | &sixtet2, |
400 | 292k | base64_variant, |
401 | 292k | error ); |
402 | | |
403 | 292k | if( result == -1 ) |
404 | 0 | { |
405 | 0 | libcerror_error_set( |
406 | 0 | error, |
407 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
408 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
409 | 0 | "%s: unable to copy base64 character to 2nd sixtet.", |
410 | 0 | function ); |
411 | |
|
412 | 0 | return( -1 ); |
413 | 0 | } |
414 | 292k | else if( result == 0 ) |
415 | 13 | { |
416 | 13 | libcerror_error_set( |
417 | 13 | error, |
418 | 13 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
419 | 13 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
420 | 13 | "%s: invalid 2nd base64 character.", |
421 | 13 | function ); |
422 | | |
423 | 13 | return( -1 ); |
424 | 13 | } |
425 | 292k | safe_padding_size = 2; |
426 | | |
427 | 292k | if( ( base64_character_size > base64_stream_size ) |
428 | 292k | || ( safe_base64_stream_index > ( base64_stream_size - base64_character_size ) ) ) |
429 | 2 | { |
430 | 2 | if( ( base64_variant & 0x0f000000UL ) == LIBUNA_BASE64_VARIANT_PADDING_REQUIRED ) |
431 | 2 | { |
432 | 2 | libcerror_error_set( |
433 | 2 | error, |
434 | 2 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
435 | 2 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
436 | 2 | "%s: base64 stream string too small - missing 3rd base64 character.", |
437 | 2 | function ); |
438 | | |
439 | 2 | return( -1 ); |
440 | 2 | } |
441 | 2 | } |
442 | 292k | else |
443 | 292k | { |
444 | 292k | switch( base64_variant & 0xf0000000UL ) |
445 | 292k | { |
446 | 292k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
447 | 292k | base64_character = base64_stream[ safe_base64_stream_index ]; |
448 | 292k | break; |
449 | | |
450 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
451 | 0 | byte_stream_copy_to_uint16_big_endian( |
452 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
453 | 0 | base64_character ); |
454 | 0 | break; |
455 | | |
456 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
457 | 0 | byte_stream_copy_to_uint16_little_endian( |
458 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
459 | 0 | base64_character ); |
460 | 0 | break; |
461 | | |
462 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
463 | 0 | byte_stream_copy_to_uint32_big_endian( |
464 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
465 | 0 | base64_character ); |
466 | 0 | break; |
467 | | |
468 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
469 | 0 | byte_stream_copy_to_uint32_little_endian( |
470 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
471 | 0 | base64_character ); |
472 | 0 | break; |
473 | 292k | } |
474 | 292k | safe_base64_stream_index += base64_character_size; |
475 | | |
476 | 292k | if( ( base64_character & 0xffffff00UL ) != 0 ) |
477 | 0 | { |
478 | 0 | libcerror_error_set( |
479 | 0 | error, |
480 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
481 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
482 | 0 | "%s: invalid 3rd base64 character.", |
483 | 0 | function ); |
484 | |
|
485 | 0 | return( -1 ); |
486 | 0 | } |
487 | 292k | if( base64_character == (uint32_t) '=' ) |
488 | 35 | { |
489 | 35 | if( ( base64_variant & 0x0f000000UL ) == LIBUNA_BASE64_VARIANT_PADDING_NONE ) |
490 | 0 | { |
491 | 0 | libcerror_error_set( |
492 | 0 | error, |
493 | 0 | LIBCERROR_ERROR_DOMAIN_RUNTIME, |
494 | 0 | LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE, |
495 | 0 | "%s: padding where not supposed to - invalid 3rd base64 character.", |
496 | 0 | function ); |
497 | |
|
498 | 0 | return( -1 ); |
499 | 0 | } |
500 | 35 | } |
501 | 292k | else |
502 | 292k | { |
503 | 292k | result = libuna_base64_character_copy_to_sixtet( |
504 | 292k | base64_character, |
505 | 292k | &sixtet3, |
506 | 292k | base64_variant, |
507 | 292k | error ); |
508 | | |
509 | 292k | if( result == -1 ) |
510 | 0 | { |
511 | 0 | libcerror_error_set( |
512 | 0 | error, |
513 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
514 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
515 | 0 | "%s: unable to copy base64 character to 3rd sixtet.", |
516 | 0 | function ); |
517 | |
|
518 | 0 | return( -1 ); |
519 | 0 | } |
520 | 292k | else if( result == 0 ) |
521 | 11 | { |
522 | 11 | if( ( base64_variant & 0x0f000000UL ) != LIBUNA_BASE64_VARIANT_PADDING_INVALID ) |
523 | 11 | { |
524 | 11 | libcerror_error_set( |
525 | 11 | error, |
526 | 11 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
527 | 11 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
528 | 11 | "%s: invalid 3rd base64 sixtet.", |
529 | 11 | function ); |
530 | | |
531 | 11 | return( -1 ); |
532 | 11 | } |
533 | 11 | } |
534 | 292k | else |
535 | 292k | { |
536 | 292k | safe_padding_size -= 1; |
537 | 292k | } |
538 | 292k | } |
539 | 292k | } |
540 | 292k | if( ( base64_character_size > base64_stream_size ) |
541 | 292k | || ( safe_base64_stream_index > ( base64_stream_size - base64_character_size ) ) ) |
542 | 6 | { |
543 | 6 | if( ( base64_variant & 0x0f000000UL ) == LIBUNA_BASE64_VARIANT_PADDING_REQUIRED ) |
544 | 6 | { |
545 | 6 | libcerror_error_set( |
546 | 6 | error, |
547 | 6 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
548 | 6 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
549 | 6 | "%s: base64 stream string too small - missing 4th base64 character.", |
550 | 6 | function ); |
551 | | |
552 | 6 | return( -1 ); |
553 | 6 | } |
554 | 6 | } |
555 | 292k | else |
556 | 292k | { |
557 | 292k | switch( base64_variant & 0xf0000000UL ) |
558 | 292k | { |
559 | 292k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
560 | 292k | base64_character = base64_stream[ safe_base64_stream_index ]; |
561 | 292k | break; |
562 | | |
563 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
564 | 0 | byte_stream_copy_to_uint16_big_endian( |
565 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
566 | 0 | base64_character ); |
567 | 0 | break; |
568 | | |
569 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
570 | 0 | byte_stream_copy_to_uint16_little_endian( |
571 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
572 | 0 | base64_character ); |
573 | 0 | break; |
574 | | |
575 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
576 | 0 | byte_stream_copy_to_uint32_big_endian( |
577 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
578 | 0 | base64_character ); |
579 | 0 | break; |
580 | | |
581 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
582 | 0 | byte_stream_copy_to_uint32_little_endian( |
583 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
584 | 0 | base64_character ); |
585 | 0 | break; |
586 | 292k | } |
587 | 292k | safe_base64_stream_index += base64_character_size; |
588 | | |
589 | 292k | if( ( base64_character & 0xffffff00UL ) != 0 ) |
590 | 0 | { |
591 | 0 | libcerror_error_set( |
592 | 0 | error, |
593 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
594 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
595 | 0 | "%s: invalid 4th base64 character.", |
596 | 0 | function ); |
597 | |
|
598 | 0 | return( -1 ); |
599 | 0 | } |
600 | 292k | if( base64_character == (uint32_t) '=' ) |
601 | 1.59k | { |
602 | 1.59k | if( ( base64_variant & 0x0f000000UL ) == LIBUNA_BASE64_VARIANT_PADDING_NONE ) |
603 | 0 | { |
604 | 0 | libcerror_error_set( |
605 | 0 | error, |
606 | 0 | LIBCERROR_ERROR_DOMAIN_RUNTIME, |
607 | 0 | LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE, |
608 | 0 | "%s: padding where not supposed to - invalid 4th base64 character.", |
609 | 0 | function ); |
610 | |
|
611 | 0 | return( -1 ); |
612 | 0 | } |
613 | 1.59k | } |
614 | 290k | else |
615 | 290k | { |
616 | 290k | result = libuna_base64_character_copy_to_sixtet( |
617 | 290k | base64_character, |
618 | 290k | &sixtet4, |
619 | 290k | base64_variant, |
620 | 290k | error ); |
621 | | |
622 | 290k | if( result == -1 ) |
623 | 0 | { |
624 | 0 | libcerror_error_set( |
625 | 0 | error, |
626 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
627 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
628 | 0 | "%s: unable to copy base64 character to 4th sixtet.", |
629 | 0 | function ); |
630 | |
|
631 | 0 | return( -1 ); |
632 | 0 | } |
633 | 290k | else if( result == 0 ) |
634 | 10 | { |
635 | 10 | if( ( base64_variant & 0x0f000000UL ) != LIBUNA_BASE64_VARIANT_PADDING_INVALID ) |
636 | 10 | { |
637 | 10 | libcerror_error_set( |
638 | 10 | error, |
639 | 10 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
640 | 10 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
641 | 10 | "%s: invalid 4th base64 sixtet.", |
642 | 10 | function ); |
643 | | |
644 | 10 | return( -1 ); |
645 | 10 | } |
646 | 10 | } |
647 | 290k | else |
648 | 290k | { |
649 | 290k | if( safe_padding_size > 1 ) |
650 | 0 | { |
651 | 0 | libcerror_error_set( |
652 | 0 | error, |
653 | 0 | LIBCERROR_ERROR_DOMAIN_RUNTIME, |
654 | 0 | LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE, |
655 | 0 | "%s: non-padding where not supposed to - invalid 4th base64 character.", |
656 | 0 | function ); |
657 | |
|
658 | 0 | return( -1 ); |
659 | 0 | } |
660 | 290k | safe_padding_size -= 1; |
661 | 290k | } |
662 | 290k | } |
663 | 292k | } |
664 | 292k | safe_base64_triplet = sixtet1; |
665 | 292k | safe_base64_triplet <<= 6; |
666 | 292k | safe_base64_triplet |= sixtet2; |
667 | 292k | safe_base64_triplet <<= 6; |
668 | 292k | safe_base64_triplet |= sixtet3; |
669 | 292k | safe_base64_triplet <<= 6; |
670 | 292k | safe_base64_triplet |= sixtet4; |
671 | | |
672 | 292k | *base64_triplet = safe_base64_triplet; |
673 | 292k | *base64_stream_index = safe_base64_stream_index; |
674 | 292k | *padding_size = safe_padding_size; |
675 | | |
676 | 292k | return( 1 ); |
677 | 292k | } |
678 | | |
679 | | /* Copies a base64 triplet to a base64 stream |
680 | | * Returns 1 if successful or -1 on error |
681 | | */ |
682 | | int libuna_base64_triplet_copy_to_base64_stream( |
683 | | uint32_t base64_triplet, |
684 | | uint8_t *base64_stream, |
685 | | size_t base64_stream_size, |
686 | | size_t *base64_stream_index, |
687 | | uint8_t padding_size, |
688 | | uint32_t base64_variant, |
689 | | libcerror_error_t **error ) |
690 | 0 | { |
691 | 0 | uint8_t *sixtet_to_character_table = NULL; |
692 | 0 | static char *function = "libuna_base64_triplet_copy_to_base64_stream"; |
693 | 0 | size_t base64_character_size = 0; |
694 | 0 | size_t safe_base64_stream_index = 0; |
695 | 0 | uint32_t base64_character = 0; |
696 | 0 | uint8_t padding_character = 0; |
697 | 0 | uint8_t sixtet1 = 0; |
698 | 0 | uint8_t sixtet2 = 0; |
699 | 0 | uint8_t sixtet3 = 0; |
700 | 0 | uint8_t sixtet4 = 0; |
701 | |
|
702 | 0 | if( base64_stream == NULL ) |
703 | 0 | { |
704 | 0 | libcerror_error_set( |
705 | 0 | error, |
706 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
707 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
708 | 0 | "%s: invalid base64 stream.", |
709 | 0 | function ); |
710 | |
|
711 | 0 | return( -1 ); |
712 | 0 | } |
713 | 0 | if( base64_stream_size > (size_t) SSIZE_MAX ) |
714 | 0 | { |
715 | 0 | libcerror_error_set( |
716 | 0 | error, |
717 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
718 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
719 | 0 | "%s: invalid base64 stream size value exceeds maximum.", |
720 | 0 | function ); |
721 | |
|
722 | 0 | return( -1 ); |
723 | 0 | } |
724 | 0 | if( base64_stream_index == NULL ) |
725 | 0 | { |
726 | 0 | libcerror_error_set( |
727 | 0 | error, |
728 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
729 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
730 | 0 | "%s: invalid base64 stream index.", |
731 | 0 | function ); |
732 | |
|
733 | 0 | return( -1 ); |
734 | 0 | } |
735 | 0 | if( *base64_stream_index >= base64_stream_size ) |
736 | 0 | { |
737 | 0 | libcerror_error_set( |
738 | 0 | error, |
739 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
740 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
741 | 0 | "%s: base64 stream string too small.", |
742 | 0 | function ); |
743 | |
|
744 | 0 | return( -1 ); |
745 | 0 | } |
746 | 0 | if( padding_size > 2 ) |
747 | 0 | { |
748 | 0 | libcerror_error_set( |
749 | 0 | error, |
750 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
751 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS, |
752 | 0 | "%s: invalid padding size value out of bounds.", |
753 | 0 | function ); |
754 | |
|
755 | 0 | return( -1 ); |
756 | 0 | } |
757 | 0 | switch( base64_variant & 0x000f0000UL ) |
758 | 0 | { |
759 | 0 | case LIBUNA_BASE64_VARIANT_ALPHABET_NORMAL: |
760 | 0 | sixtet_to_character_table = libuna_base64_sixtet_to_character_table; |
761 | 0 | break; |
762 | | |
763 | 0 | case LIBUNA_BASE64_VARIANT_ALPHABET_URL: |
764 | 0 | sixtet_to_character_table = libuna_base64url_sixtet_to_character_table; |
765 | 0 | break; |
766 | | |
767 | 0 | default: |
768 | 0 | libcerror_error_set( |
769 | 0 | error, |
770 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
771 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
772 | 0 | "%s: unsupported base64 variant.", |
773 | 0 | function ); |
774 | |
|
775 | 0 | return( -1 ); |
776 | 0 | } |
777 | 0 | switch( base64_variant & 0x0f000000UL ) |
778 | 0 | { |
779 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_NONE: |
780 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_OPTIONAL: |
781 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_INVALID: |
782 | 0 | padding_character = 0; |
783 | 0 | break; |
784 | | |
785 | | |
786 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_REQUIRED: |
787 | 0 | padding_character = (uint8_t) '='; |
788 | 0 | break; |
789 | | |
790 | 0 | default: |
791 | 0 | libcerror_error_set( |
792 | 0 | error, |
793 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
794 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
795 | 0 | "%s: unsupported base64 variant.", |
796 | 0 | function ); |
797 | |
|
798 | 0 | return( -1 ); |
799 | 0 | } |
800 | 0 | switch( base64_variant & 0xf0000000UL ) |
801 | 0 | { |
802 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
803 | 0 | base64_character_size = 1; |
804 | 0 | break; |
805 | | |
806 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
807 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
808 | 0 | base64_character_size = 2; |
809 | 0 | break; |
810 | | |
811 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
812 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
813 | 0 | base64_character_size = 4; |
814 | 0 | break; |
815 | | |
816 | 0 | default: |
817 | 0 | libcerror_error_set( |
818 | 0 | error, |
819 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
820 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
821 | 0 | "%s: unsupported base64 variant.", |
822 | 0 | function ); |
823 | |
|
824 | 0 | return( -1 ); |
825 | 0 | } |
826 | 0 | safe_base64_stream_index = *base64_stream_index; |
827 | | |
828 | | /* Separate the 3 bytes value into 4 x 6 bit values |
829 | | */ |
830 | 0 | sixtet4 = (uint8_t) ( base64_triplet & 0x3f ); |
831 | 0 | base64_triplet >>= 6; |
832 | 0 | sixtet3 = (uint8_t) ( base64_triplet & 0x3f ); |
833 | 0 | base64_triplet >>= 6; |
834 | 0 | sixtet2 = (uint8_t) ( base64_triplet & 0x3f ); |
835 | 0 | base64_triplet >>= 6; |
836 | 0 | sixtet1 = (uint8_t) ( base64_triplet & 0x3f ); |
837 | | |
838 | | /* Spread the encoding over 2 characters if 1 byte is available |
839 | | */ |
840 | 0 | if( ( safe_base64_stream_index + ( base64_character_size * 2 ) ) > base64_stream_size ) |
841 | 0 | { |
842 | 0 | libcerror_error_set( |
843 | 0 | error, |
844 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
845 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
846 | 0 | "%s: base64 stream is too small.", |
847 | 0 | function ); |
848 | |
|
849 | 0 | return( -1 ); |
850 | 0 | } |
851 | 0 | base64_character = sixtet_to_character_table[ sixtet1 ]; |
852 | |
|
853 | 0 | switch( base64_variant & 0xf0000000UL ) |
854 | 0 | { |
855 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
856 | 0 | base64_stream[ safe_base64_stream_index ] = (uint8_t) base64_character; |
857 | 0 | break; |
858 | | |
859 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
860 | 0 | byte_stream_copy_from_uint16_big_endian( |
861 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
862 | 0 | base64_character ); |
863 | 0 | break; |
864 | | |
865 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
866 | 0 | byte_stream_copy_from_uint16_little_endian( |
867 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
868 | 0 | base64_character ); |
869 | 0 | break; |
870 | | |
871 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
872 | 0 | byte_stream_copy_from_uint32_big_endian( |
873 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
874 | 0 | base64_character ); |
875 | 0 | break; |
876 | | |
877 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
878 | 0 | byte_stream_copy_from_uint32_little_endian( |
879 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
880 | 0 | base64_character ); |
881 | 0 | break; |
882 | 0 | } |
883 | 0 | safe_base64_stream_index += base64_character_size; |
884 | |
|
885 | 0 | base64_character = sixtet_to_character_table[ sixtet2 ]; |
886 | |
|
887 | 0 | switch( base64_variant & 0xf0000000UL ) |
888 | 0 | { |
889 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
890 | 0 | base64_stream[ safe_base64_stream_index ] = (uint8_t) base64_character; |
891 | 0 | break; |
892 | | |
893 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
894 | 0 | byte_stream_copy_from_uint16_big_endian( |
895 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
896 | 0 | base64_character ); |
897 | 0 | break; |
898 | | |
899 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
900 | 0 | byte_stream_copy_from_uint16_little_endian( |
901 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
902 | 0 | base64_character ); |
903 | 0 | break; |
904 | | |
905 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
906 | 0 | byte_stream_copy_from_uint32_big_endian( |
907 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
908 | 0 | base64_character ); |
909 | 0 | break; |
910 | | |
911 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
912 | 0 | byte_stream_copy_from_uint32_little_endian( |
913 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
914 | 0 | base64_character ); |
915 | 0 | break; |
916 | 0 | } |
917 | 0 | safe_base64_stream_index += base64_character_size; |
918 | | |
919 | | /* Spread the encoding over 3 characters if 2 bytes are available |
920 | | * Otherwise pad the remaining bytes if required |
921 | | */ |
922 | 0 | if( ( safe_base64_stream_index + base64_character_size ) > base64_stream_size ) |
923 | 0 | { |
924 | 0 | libcerror_error_set( |
925 | 0 | error, |
926 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
927 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
928 | 0 | "%s: base64 stream is too small.", |
929 | 0 | function ); |
930 | |
|
931 | 0 | return( -1 ); |
932 | 0 | } |
933 | 0 | if( ( padding_size < 2 ) |
934 | 0 | || ( padding_character != 0 ) ) |
935 | 0 | { |
936 | 0 | if( padding_size < 2 ) |
937 | 0 | { |
938 | 0 | base64_character = sixtet_to_character_table[ sixtet3 ]; |
939 | 0 | } |
940 | 0 | else if( padding_character != 0 ) |
941 | 0 | { |
942 | 0 | base64_character = padding_character; |
943 | 0 | } |
944 | 0 | switch( base64_variant & 0xf0000000UL ) |
945 | 0 | { |
946 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
947 | 0 | base64_stream[ safe_base64_stream_index ] = (uint8_t) base64_character; |
948 | 0 | break; |
949 | | |
950 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
951 | 0 | byte_stream_copy_from_uint16_big_endian( |
952 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
953 | 0 | base64_character ); |
954 | 0 | break; |
955 | | |
956 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
957 | 0 | byte_stream_copy_from_uint16_little_endian( |
958 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
959 | 0 | base64_character ); |
960 | 0 | break; |
961 | | |
962 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
963 | 0 | byte_stream_copy_from_uint32_big_endian( |
964 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
965 | 0 | base64_character ); |
966 | 0 | break; |
967 | | |
968 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
969 | 0 | byte_stream_copy_from_uint32_little_endian( |
970 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
971 | 0 | base64_character ); |
972 | 0 | break; |
973 | 0 | } |
974 | 0 | safe_base64_stream_index += base64_character_size; |
975 | 0 | } |
976 | | /* Spread the encoding over 4 characters if 3 bytes are available |
977 | | * Otherwise pad the remaining bytes if required |
978 | | */ |
979 | 0 | if( ( safe_base64_stream_index + base64_character_size ) > base64_stream_size ) |
980 | 0 | { |
981 | 0 | libcerror_error_set( |
982 | 0 | error, |
983 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
984 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
985 | 0 | "%s: base64 stream is too small.", |
986 | 0 | function ); |
987 | |
|
988 | 0 | return( -1 ); |
989 | 0 | } |
990 | 0 | if( ( padding_size < 1 ) |
991 | 0 | || ( padding_character != 0 ) ) |
992 | 0 | { |
993 | 0 | if( padding_size < 1 ) |
994 | 0 | { |
995 | 0 | base64_character = sixtet_to_character_table[ sixtet4 ]; |
996 | 0 | } |
997 | 0 | else if( padding_character != 0 ) |
998 | 0 | { |
999 | 0 | base64_character = padding_character; |
1000 | 0 | } |
1001 | 0 | switch( base64_variant & 0xf0000000UL ) |
1002 | 0 | { |
1003 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1004 | 0 | base64_stream[ safe_base64_stream_index ] = (uint8_t) base64_character; |
1005 | 0 | break; |
1006 | | |
1007 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1008 | 0 | byte_stream_copy_from_uint16_big_endian( |
1009 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
1010 | 0 | base64_character ); |
1011 | 0 | break; |
1012 | | |
1013 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1014 | 0 | byte_stream_copy_from_uint16_little_endian( |
1015 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
1016 | 0 | base64_character ); |
1017 | 0 | break; |
1018 | | |
1019 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1020 | 0 | byte_stream_copy_from_uint32_big_endian( |
1021 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
1022 | 0 | base64_character ); |
1023 | 0 | break; |
1024 | | |
1025 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1026 | 0 | byte_stream_copy_from_uint32_little_endian( |
1027 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
1028 | 0 | base64_character ); |
1029 | 0 | break; |
1030 | 0 | } |
1031 | 0 | safe_base64_stream_index += base64_character_size; |
1032 | 0 | } |
1033 | 0 | *base64_stream_index = safe_base64_stream_index; |
1034 | |
|
1035 | 0 | return( 1 ); |
1036 | 0 | } |
1037 | | |
1038 | | /* Copies a base64 triplet from a byte stream |
1039 | | * Returns 1 if successful or -1 on error |
1040 | | */ |
1041 | | int libuna_base64_triplet_copy_from_byte_stream( |
1042 | | uint32_t *base64_triplet, |
1043 | | const uint8_t *byte_stream, |
1044 | | size_t byte_stream_size, |
1045 | | size_t *byte_stream_index, |
1046 | | uint8_t *padding_size, |
1047 | | libcerror_error_t **error ) |
1048 | 0 | { |
1049 | 0 | static char *function = "libuna_base64_triplet_copy_from_byte_stream"; |
1050 | 0 | size_t safe_byte_stream_index = 0; |
1051 | 0 | uint32_t safe_base64_triplet = 0; |
1052 | 0 | uint8_t safe_padding_size = 0; |
1053 | |
|
1054 | 0 | if( base64_triplet == NULL ) |
1055 | 0 | { |
1056 | 0 | libcerror_error_set( |
1057 | 0 | error, |
1058 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1059 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1060 | 0 | "%s: invalid base64 triplet.", |
1061 | 0 | function ); |
1062 | |
|
1063 | 0 | return( -1 ); |
1064 | 0 | } |
1065 | 0 | if( byte_stream == NULL ) |
1066 | 0 | { |
1067 | 0 | libcerror_error_set( |
1068 | 0 | error, |
1069 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1070 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1071 | 0 | "%s: invalid byte stream.", |
1072 | 0 | function ); |
1073 | |
|
1074 | 0 | return( -1 ); |
1075 | 0 | } |
1076 | 0 | if( byte_stream_size > (size_t) SSIZE_MAX ) |
1077 | 0 | { |
1078 | 0 | libcerror_error_set( |
1079 | 0 | error, |
1080 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1081 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
1082 | 0 | "%s: invalid byte stream size value exceeds maximum.", |
1083 | 0 | function ); |
1084 | |
|
1085 | 0 | return( -1 ); |
1086 | 0 | } |
1087 | 0 | if( byte_stream_index == NULL ) |
1088 | 0 | { |
1089 | 0 | libcerror_error_set( |
1090 | 0 | error, |
1091 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1092 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1093 | 0 | "%s: invalid byte stream index.", |
1094 | 0 | function ); |
1095 | |
|
1096 | 0 | return( -1 ); |
1097 | 0 | } |
1098 | 0 | if( *byte_stream_index >= byte_stream_size ) |
1099 | 0 | { |
1100 | 0 | libcerror_error_set( |
1101 | 0 | error, |
1102 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1103 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
1104 | 0 | "%s: byte stream string too small.", |
1105 | 0 | function ); |
1106 | |
|
1107 | 0 | return( -1 ); |
1108 | 0 | } |
1109 | 0 | if( padding_size == NULL ) |
1110 | 0 | { |
1111 | 0 | libcerror_error_set( |
1112 | 0 | error, |
1113 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1114 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1115 | 0 | "%s: invalid padding size.", |
1116 | 0 | function ); |
1117 | |
|
1118 | 0 | return( -1 ); |
1119 | 0 | } |
1120 | 0 | safe_byte_stream_index = *byte_stream_index; |
1121 | | |
1122 | | /* Determine the value of 3 bytes (24 bits) |
1123 | | */ |
1124 | 0 | safe_base64_triplet = byte_stream[ safe_byte_stream_index++ ]; |
1125 | 0 | safe_padding_size = 2; |
1126 | |
|
1127 | 0 | safe_base64_triplet <<= 8; |
1128 | |
|
1129 | 0 | if( safe_byte_stream_index < byte_stream_size ) |
1130 | 0 | { |
1131 | 0 | safe_base64_triplet |= byte_stream[ safe_byte_stream_index++ ]; |
1132 | 0 | safe_padding_size -= 1; |
1133 | 0 | } |
1134 | 0 | safe_base64_triplet <<= 8; |
1135 | |
|
1136 | 0 | if( safe_byte_stream_index < byte_stream_size ) |
1137 | 0 | { |
1138 | 0 | safe_base64_triplet |= byte_stream[ safe_byte_stream_index++ ]; |
1139 | 0 | safe_padding_size -= 1; |
1140 | 0 | } |
1141 | 0 | *base64_triplet = safe_base64_triplet; |
1142 | 0 | *byte_stream_index = safe_byte_stream_index; |
1143 | 0 | *padding_size = safe_padding_size; |
1144 | |
|
1145 | 0 | return( 1 ); |
1146 | 0 | } |
1147 | | |
1148 | | /* Copies a base64 triplet to a byte stream |
1149 | | * Returns 1 if successful or -1 on error |
1150 | | */ |
1151 | | int libuna_base64_triplet_copy_to_byte_stream( |
1152 | | uint32_t base64_triplet, |
1153 | | uint8_t *byte_stream, |
1154 | | size_t byte_stream_size, |
1155 | | size_t *byte_stream_index, |
1156 | | uint8_t padding_size, |
1157 | | libcerror_error_t **error ) |
1158 | 292k | { |
1159 | 292k | static char *function = "libuna_base64_triplet_copy_to_byte_stream"; |
1160 | 292k | size_t safe_byte_stream_index = 0; |
1161 | | |
1162 | 292k | if( byte_stream == NULL ) |
1163 | 0 | { |
1164 | 0 | libcerror_error_set( |
1165 | 0 | error, |
1166 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1167 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1168 | 0 | "%s: invalid byte stream.", |
1169 | 0 | function ); |
1170 | |
|
1171 | 0 | return( -1 ); |
1172 | 0 | } |
1173 | 292k | if( byte_stream_size > (size_t) SSIZE_MAX ) |
1174 | 0 | { |
1175 | 0 | libcerror_error_set( |
1176 | 0 | error, |
1177 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1178 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
1179 | 0 | "%s: invalid byte stream size value exceeds maximum.", |
1180 | 0 | function ); |
1181 | |
|
1182 | 0 | return( -1 ); |
1183 | 0 | } |
1184 | 292k | if( byte_stream_index == NULL ) |
1185 | 0 | { |
1186 | 0 | libcerror_error_set( |
1187 | 0 | error, |
1188 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1189 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1190 | 0 | "%s: invalid byte stream index.", |
1191 | 0 | function ); |
1192 | |
|
1193 | 0 | return( -1 ); |
1194 | 0 | } |
1195 | 292k | if( *byte_stream_index >= byte_stream_size ) |
1196 | 0 | { |
1197 | 0 | libcerror_error_set( |
1198 | 0 | error, |
1199 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1200 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
1201 | 0 | "%s: byte stream string too small.", |
1202 | 0 | function ); |
1203 | |
|
1204 | 0 | return( -1 ); |
1205 | 0 | } |
1206 | 292k | if( padding_size > 2 ) |
1207 | 0 | { |
1208 | 0 | libcerror_error_set( |
1209 | 0 | error, |
1210 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1211 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS, |
1212 | 0 | "%s: invalid padding size value out of bounds.", |
1213 | 0 | function ); |
1214 | |
|
1215 | 0 | return( -1 ); |
1216 | 0 | } |
1217 | 292k | safe_byte_stream_index = *byte_stream_index; |
1218 | | |
1219 | 292k | byte_stream[ safe_byte_stream_index++ ] = (uint8_t) ( ( base64_triplet >> 16 ) & 0xff ); |
1220 | | |
1221 | 292k | if( padding_size <= 1 ) |
1222 | 292k | { |
1223 | 292k | if( safe_byte_stream_index >= byte_stream_size ) |
1224 | 0 | { |
1225 | 0 | libcerror_error_set( |
1226 | 0 | error, |
1227 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1228 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
1229 | 0 | "%s: byte stream string too small.", |
1230 | 0 | function ); |
1231 | |
|
1232 | 0 | return( -1 ); |
1233 | 0 | } |
1234 | 292k | byte_stream[ safe_byte_stream_index++ ] = (uint8_t) ( ( base64_triplet >> 8 ) & 0xff ); |
1235 | 292k | } |
1236 | 292k | if( padding_size == 0 ) |
1237 | 290k | { |
1238 | 290k | if( safe_byte_stream_index >= byte_stream_size ) |
1239 | 0 | { |
1240 | 0 | libcerror_error_set( |
1241 | 0 | error, |
1242 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1243 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
1244 | 0 | "%s: byte stream is too small.", |
1245 | 0 | function ); |
1246 | |
|
1247 | 0 | return( -1 ); |
1248 | 0 | } |
1249 | 290k | byte_stream[ safe_byte_stream_index++ ] = (uint8_t) ( base64_triplet & 0xff ); |
1250 | 290k | } |
1251 | 292k | *byte_stream_index = safe_byte_stream_index; |
1252 | | |
1253 | 292k | return( 1 ); |
1254 | 292k | } |
1255 | | |
1256 | | /* Determines the size of a byte stream from a base64 stream |
1257 | | * |
1258 | | * LIBUNA_BASE64_FLAG_STRIP_WHITESPACE removes leading space and tab characters, |
1259 | | * and trailing space, tab and end of line characters |
1260 | | * |
1261 | | * Returns 1 if successful or -1 on error |
1262 | | */ |
1263 | | int libuna_base64_stream_size_to_byte_stream( |
1264 | | const uint8_t *base64_stream, |
1265 | | size_t base64_stream_size, |
1266 | | size_t *byte_stream_size, |
1267 | | uint32_t base64_variant, |
1268 | | uint8_t flags, |
1269 | | libcerror_error_t **error ) |
1270 | 1.94k | { |
1271 | 1.94k | static char *function = "libuna_base64_stream_size_to_byte_stream"; |
1272 | 1.94k | size_t base64_character_size = 0; |
1273 | 1.94k | size_t base64_stream_index = 0; |
1274 | 1.94k | size_t number_of_characters = 0; |
1275 | 1.94k | size_t safe_byte_stream_size = 0; |
1276 | 1.94k | size_t whitespace_size = 0; |
1277 | 1.94k | uint32_t base64_character1 = 0; |
1278 | 1.94k | uint32_t base64_character2 = 0; |
1279 | 1.94k | uint8_t base64_character_62 = 0; |
1280 | 1.94k | uint8_t base64_character_63 = 0; |
1281 | 1.94k | uint8_t character_limit = 0; |
1282 | 1.94k | uint8_t padding_size = 0; |
1283 | 1.94k | uint8_t strip_mode = LIBUNA_STRIP_MODE_LEADING_WHITESPACE; |
1284 | | |
1285 | 1.94k | if( base64_stream == NULL ) |
1286 | 1 | { |
1287 | 1 | libcerror_error_set( |
1288 | 1 | error, |
1289 | 1 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1290 | 1 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1291 | 1 | "%s: invalid base64 stream.", |
1292 | 1 | function ); |
1293 | | |
1294 | 1 | return( -1 ); |
1295 | 1 | } |
1296 | 1.94k | if( ( base64_stream_size == 0 ) |
1297 | 1.94k | || ( base64_stream_size > (size_t) SSIZE_MAX ) ) |
1298 | 0 | { |
1299 | 0 | libcerror_error_set( |
1300 | 0 | error, |
1301 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1302 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS, |
1303 | 0 | "%s: invalid base64 stream size value out of bounds.", |
1304 | 0 | function ); |
1305 | |
|
1306 | 0 | return( -1 ); |
1307 | 0 | } |
1308 | 1.94k | if( byte_stream_size == NULL ) |
1309 | 0 | { |
1310 | 0 | libcerror_error_set( |
1311 | 0 | error, |
1312 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1313 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1314 | 0 | "%s: invalid byte stream size.", |
1315 | 0 | function ); |
1316 | |
|
1317 | 0 | return( -1 ); |
1318 | 0 | } |
1319 | 1.94k | switch( base64_variant & 0x000000ffUL ) |
1320 | 1.94k | { |
1321 | 1.94k | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_NONE: |
1322 | 1.94k | character_limit = 0; |
1323 | | |
1324 | 1.94k | break; |
1325 | | |
1326 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_64: |
1327 | 0 | character_limit = 64; |
1328 | |
|
1329 | 0 | break; |
1330 | | |
1331 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_76: |
1332 | 0 | character_limit = 76; |
1333 | |
|
1334 | 0 | break; |
1335 | | |
1336 | 0 | default: |
1337 | 0 | libcerror_error_set( |
1338 | 0 | error, |
1339 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1340 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
1341 | 0 | "%s: unsupported base64 variant.", |
1342 | 0 | function ); |
1343 | |
|
1344 | 0 | return( -1 ); |
1345 | 1.94k | } |
1346 | 1.94k | switch( base64_variant & 0x000f0000UL ) |
1347 | 1.94k | { |
1348 | 1.94k | case LIBUNA_BASE64_VARIANT_ALPHABET_NORMAL: |
1349 | 1.94k | base64_character_62 = (uint8_t) '+'; |
1350 | 1.94k | base64_character_63 = (uint8_t) '/'; |
1351 | 1.94k | break; |
1352 | | |
1353 | 0 | case LIBUNA_BASE64_VARIANT_ALPHABET_URL: |
1354 | 0 | base64_character_62 = (uint8_t) '-'; |
1355 | 0 | base64_character_63 = (uint8_t) '_'; |
1356 | 0 | break; |
1357 | | |
1358 | 0 | default: |
1359 | 0 | libcerror_error_set( |
1360 | 0 | error, |
1361 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1362 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
1363 | 0 | "%s: unsupported base64 variant.", |
1364 | 0 | function ); |
1365 | |
|
1366 | 0 | return( -1 ); |
1367 | 1.94k | } |
1368 | 1.94k | switch( base64_variant & 0xf0000000UL ) |
1369 | 1.94k | { |
1370 | 1.94k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1371 | 1.94k | base64_character_size = 1; |
1372 | 1.94k | break; |
1373 | | |
1374 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1375 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1376 | 0 | base64_character_size = 2; |
1377 | 0 | break; |
1378 | | |
1379 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1380 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1381 | 0 | base64_character_size = 4; |
1382 | 0 | break; |
1383 | | |
1384 | 0 | default: |
1385 | 0 | libcerror_error_set( |
1386 | 0 | error, |
1387 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1388 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
1389 | 0 | "%s: unsupported base64 variant.", |
1390 | 0 | function ); |
1391 | |
|
1392 | 0 | return( -1 ); |
1393 | 1.94k | } |
1394 | 1.94k | if( base64_stream_size < base64_character_size ) |
1395 | 0 | { |
1396 | 0 | libcerror_error_set( |
1397 | 0 | error, |
1398 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1399 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
1400 | 0 | "%s: invalid base64 stream value too small.", |
1401 | 0 | function ); |
1402 | |
|
1403 | 0 | return( -1 ); |
1404 | 0 | } |
1405 | 1.94k | if( ( flags & ~( LIBUNA_BASE64_FLAG_STRIP_WHITESPACE ) ) != 0 ) |
1406 | 0 | { |
1407 | 0 | libcerror_error_set( |
1408 | 0 | error, |
1409 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1410 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
1411 | 0 | "%s: unsupported flags.", |
1412 | 0 | function ); |
1413 | |
|
1414 | 0 | return( -1 ); |
1415 | 0 | } |
1416 | 1.94k | base64_stream_index = base64_stream_size - base64_character_size; |
1417 | 1.94k | whitespace_size = 0; |
1418 | | |
1419 | 183k | while( base64_stream_index > base64_character_size ) |
1420 | 183k | { |
1421 | 183k | switch( base64_variant & 0xf0000000UL ) |
1422 | 183k | { |
1423 | 183k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1424 | 183k | base64_character1 = base64_stream[ base64_stream_index ]; |
1425 | 183k | break; |
1426 | | |
1427 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1428 | 0 | byte_stream_copy_to_uint16_big_endian( |
1429 | 0 | &( base64_stream[ base64_stream_index ] ), |
1430 | 0 | base64_character1 ); |
1431 | 0 | break; |
1432 | | |
1433 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1434 | 0 | byte_stream_copy_to_uint16_little_endian( |
1435 | 0 | &( base64_stream[ base64_stream_index ] ), |
1436 | 0 | base64_character1 ); |
1437 | 0 | break; |
1438 | | |
1439 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1440 | 0 | byte_stream_copy_to_uint32_big_endian( |
1441 | 0 | &( base64_stream[ base64_stream_index ] ), |
1442 | 0 | base64_character1 ); |
1443 | 0 | break; |
1444 | | |
1445 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1446 | 0 | byte_stream_copy_to_uint32_little_endian( |
1447 | 0 | &( base64_stream[ base64_stream_index ] ), |
1448 | 0 | base64_character1 ); |
1449 | 0 | break; |
1450 | 183k | } |
1451 | 183k | base64_stream_index -= base64_character_size; |
1452 | | |
1453 | 183k | if( ( base64_character1 == (uint32_t) '\n' ) |
1454 | 183k | || ( base64_character1 == (uint32_t) '\r' ) ) |
1455 | 3.19k | { |
1456 | 3.19k | whitespace_size += base64_character_size; |
1457 | 3.19k | } |
1458 | 180k | else if( ( flags & LIBUNA_BASE64_FLAG_STRIP_WHITESPACE ) == 0 ) |
1459 | 0 | { |
1460 | 0 | break; |
1461 | 0 | } |
1462 | 180k | else if( ( base64_character1 == (uint32_t) ' ' ) |
1463 | 180k | || ( base64_character1 == (uint32_t) '\t' ) |
1464 | 180k | || ( base64_character1 == (uint32_t) '\v' ) ) |
1465 | 178k | { |
1466 | 178k | whitespace_size += base64_character_size; |
1467 | 178k | } |
1468 | 1.94k | else |
1469 | 1.94k | { |
1470 | 1.94k | break; |
1471 | 1.94k | } |
1472 | 183k | } |
1473 | 1.94k | base64_stream_size -= whitespace_size; |
1474 | 1.94k | base64_stream_index = base64_stream_size - base64_character_size; |
1475 | | |
1476 | 1.94k | if( base64_stream_size < base64_character_size ) |
1477 | 0 | { |
1478 | 0 | libcerror_error_set( |
1479 | 0 | error, |
1480 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1481 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
1482 | 0 | "%s: invalid base64 stream value too small.", |
1483 | 0 | function ); |
1484 | |
|
1485 | 0 | return( -1 ); |
1486 | 0 | } |
1487 | 1.94k | if( base64_stream_index > base64_character_size ) |
1488 | 1.94k | { |
1489 | 1.94k | switch( base64_variant & 0xf0000000UL ) |
1490 | 1.94k | { |
1491 | 1.94k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1492 | 1.94k | base64_character1 = base64_stream[ base64_stream_index ]; |
1493 | 1.94k | break; |
1494 | | |
1495 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1496 | 0 | byte_stream_copy_to_uint16_big_endian( |
1497 | 0 | &( base64_stream[ base64_stream_index ] ), |
1498 | 0 | base64_character1 ); |
1499 | 0 | break; |
1500 | | |
1501 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1502 | 0 | byte_stream_copy_to_uint16_little_endian( |
1503 | 0 | &( base64_stream[ base64_stream_index ] ), |
1504 | 0 | base64_character1 ); |
1505 | 0 | break; |
1506 | | |
1507 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1508 | 0 | byte_stream_copy_to_uint32_big_endian( |
1509 | 0 | &( base64_stream[ base64_stream_index ] ), |
1510 | 0 | base64_character1 ); |
1511 | 0 | break; |
1512 | | |
1513 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1514 | 0 | byte_stream_copy_to_uint32_little_endian( |
1515 | 0 | &( base64_stream[ base64_stream_index ] ), |
1516 | 0 | base64_character1 ); |
1517 | 0 | break; |
1518 | 1.94k | } |
1519 | 1.94k | base64_stream_index -= base64_character_size; |
1520 | | |
1521 | 1.94k | if( base64_character1 == (uint32_t) '=' ) |
1522 | 1.62k | { |
1523 | 1.62k | padding_size += 1; |
1524 | 1.62k | } |
1525 | 1.94k | } |
1526 | 1.94k | if( base64_stream_index > base64_character_size ) |
1527 | 1.94k | { |
1528 | 1.94k | switch( base64_variant & 0xf0000000UL ) |
1529 | 1.94k | { |
1530 | 1.94k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1531 | 1.94k | base64_character1 = base64_stream[ base64_stream_index ]; |
1532 | 1.94k | break; |
1533 | | |
1534 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1535 | 0 | byte_stream_copy_to_uint16_big_endian( |
1536 | 0 | &( base64_stream[ base64_stream_index ] ), |
1537 | 0 | base64_character1 ); |
1538 | 0 | break; |
1539 | | |
1540 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1541 | 0 | byte_stream_copy_to_uint16_little_endian( |
1542 | 0 | &( base64_stream[ base64_stream_index ] ), |
1543 | 0 | base64_character1 ); |
1544 | 0 | break; |
1545 | | |
1546 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1547 | 0 | byte_stream_copy_to_uint32_big_endian( |
1548 | 0 | &( base64_stream[ base64_stream_index ] ), |
1549 | 0 | base64_character1 ); |
1550 | 0 | break; |
1551 | | |
1552 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1553 | 0 | byte_stream_copy_to_uint32_little_endian( |
1554 | 0 | &( base64_stream[ base64_stream_index ] ), |
1555 | 0 | base64_character1 ); |
1556 | 0 | break; |
1557 | 1.94k | } |
1558 | 1.94k | base64_stream_index -= base64_character_size; |
1559 | | |
1560 | 1.94k | if( base64_character1 == (uint32_t) '=' ) |
1561 | 45 | { |
1562 | 45 | padding_size += 1; |
1563 | 45 | } |
1564 | 1.94k | } |
1565 | 1.94k | if( base64_stream_index > base64_character_size ) |
1566 | 1.93k | { |
1567 | 1.93k | switch( base64_variant & 0xf0000000UL ) |
1568 | 1.93k | { |
1569 | 1.93k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1570 | 1.93k | base64_character1 = base64_stream[ base64_stream_index ]; |
1571 | 1.93k | break; |
1572 | | |
1573 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1574 | 0 | byte_stream_copy_to_uint16_big_endian( |
1575 | 0 | &( base64_stream[ base64_stream_index ] ), |
1576 | 0 | base64_character1 ); |
1577 | 0 | break; |
1578 | | |
1579 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1580 | 0 | byte_stream_copy_to_uint16_little_endian( |
1581 | 0 | &( base64_stream[ base64_stream_index ] ), |
1582 | 0 | base64_character1 ); |
1583 | 0 | break; |
1584 | | |
1585 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1586 | 0 | byte_stream_copy_to_uint32_big_endian( |
1587 | 0 | &( base64_stream[ base64_stream_index ] ), |
1588 | 0 | base64_character1 ); |
1589 | 0 | break; |
1590 | | |
1591 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1592 | 0 | byte_stream_copy_to_uint32_little_endian( |
1593 | 0 | &( base64_stream[ base64_stream_index ] ), |
1594 | 0 | base64_character1 ); |
1595 | 0 | break; |
1596 | 1.93k | } |
1597 | 1.93k | if( base64_character1 == (uint32_t) '=' ) |
1598 | 1 | { |
1599 | 1 | libcerror_error_set( |
1600 | 1 | error, |
1601 | 1 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
1602 | 1 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
1603 | 1 | "%s: invalid number of padding bytes.", |
1604 | 1 | function ); |
1605 | | |
1606 | 1 | return( -1 ); |
1607 | 1 | } |
1608 | 1.93k | } |
1609 | 1.94k | base64_stream_index = 0; |
1610 | 1.94k | whitespace_size = 0; |
1611 | | |
1612 | 1.52M | while( base64_stream_index < ( base64_stream_size - ( padding_size * base64_character_size ) ) ) |
1613 | 1.52M | { |
1614 | 1.52M | switch( base64_variant & 0xf0000000UL ) |
1615 | 1.52M | { |
1616 | 1.52M | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1617 | 1.52M | base64_character1 = base64_stream[ base64_stream_index ]; |
1618 | 1.52M | break; |
1619 | | |
1620 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1621 | 0 | byte_stream_copy_to_uint16_big_endian( |
1622 | 0 | &( base64_stream[ base64_stream_index ] ), |
1623 | 0 | base64_character1 ); |
1624 | 0 | break; |
1625 | | |
1626 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1627 | 0 | byte_stream_copy_to_uint16_little_endian( |
1628 | 0 | &( base64_stream[ base64_stream_index ] ), |
1629 | 0 | base64_character1 ); |
1630 | 0 | break; |
1631 | | |
1632 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1633 | 0 | byte_stream_copy_to_uint32_big_endian( |
1634 | 0 | &( base64_stream[ base64_stream_index ] ), |
1635 | 0 | base64_character1 ); |
1636 | 0 | break; |
1637 | | |
1638 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1639 | 0 | byte_stream_copy_to_uint32_little_endian( |
1640 | 0 | &( base64_stream[ base64_stream_index ] ), |
1641 | 0 | base64_character1 ); |
1642 | 0 | break; |
1643 | 1.52M | } |
1644 | 1.52M | base64_stream_index += base64_character_size; |
1645 | | |
1646 | 1.52M | if( ( base64_character1 == (uint32_t) '\n' ) |
1647 | 1.52M | || ( base64_character1 == (uint32_t) '\r' ) ) |
1648 | 18.4k | { |
1649 | 18.4k | if( ( strip_mode != LIBUNA_STRIP_MODE_NON_WHITESPACE ) |
1650 | 18.4k | && ( strip_mode != LIBUNA_STRIP_MODE_TRAILING_WHITESPACE ) ) |
1651 | 4 | { |
1652 | 4 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
1653 | 4 | } |
1654 | 18.4k | else |
1655 | 18.4k | { |
1656 | 18.4k | if( ( base64_stream_index + base64_character_size ) < base64_stream_size ) |
1657 | 18.4k | { |
1658 | 18.4k | switch( base64_variant & 0xf0000000UL ) |
1659 | 18.4k | { |
1660 | 18.4k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1661 | 18.4k | base64_character2 = base64_stream[ base64_stream_index ]; |
1662 | 18.4k | break; |
1663 | | |
1664 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1665 | 0 | byte_stream_copy_to_uint16_big_endian( |
1666 | 0 | &( base64_stream[ base64_stream_index ] ), |
1667 | 0 | base64_character2 ); |
1668 | 0 | break; |
1669 | | |
1670 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1671 | 0 | byte_stream_copy_to_uint16_little_endian( |
1672 | 0 | &( base64_stream[ base64_stream_index ] ), |
1673 | 0 | base64_character2 ); |
1674 | 0 | break; |
1675 | | |
1676 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1677 | 0 | byte_stream_copy_to_uint32_big_endian( |
1678 | 0 | &( base64_stream[ base64_stream_index ] ), |
1679 | 0 | base64_character2 ); |
1680 | 0 | break; |
1681 | | |
1682 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1683 | 0 | byte_stream_copy_to_uint32_little_endian( |
1684 | 0 | &( base64_stream[ base64_stream_index ] ), |
1685 | 0 | base64_character2 ); |
1686 | 0 | break; |
1687 | 18.4k | } |
1688 | 18.4k | if( ( base64_character2 == (uint32_t) '\n' ) |
1689 | 18.4k | || ( base64_character2 == (uint32_t) '\r' ) ) |
1690 | 1.94k | { |
1691 | 1.94k | base64_stream_index += base64_character_size; |
1692 | | |
1693 | 1.94k | whitespace_size += base64_character_size; |
1694 | 1.94k | } |
1695 | 18.4k | } |
1696 | 18.4k | strip_mode = LIBUNA_STRIP_MODE_LEADING_WHITESPACE; |
1697 | 18.4k | } |
1698 | 18.4k | if( ( number_of_characters != 0 ) |
1699 | 18.4k | && ( character_limit != 0 ) ) |
1700 | 0 | { |
1701 | 0 | if( number_of_characters != (size_t) character_limit ) |
1702 | 0 | { |
1703 | 0 | libcerror_error_set( |
1704 | 0 | error, |
1705 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
1706 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
1707 | 0 | "%s: number of characters in line does not match character limit.", |
1708 | 0 | function ); |
1709 | |
|
1710 | 0 | return( -1 ); |
1711 | 0 | } |
1712 | 0 | number_of_characters = 0; |
1713 | 0 | } |
1714 | 18.4k | whitespace_size += base64_character_size; |
1715 | 18.4k | } |
1716 | 1.50M | else if( ( base64_character1 == (uint32_t) ' ' ) |
1717 | 1.50M | || ( base64_character1 == (uint32_t) '\t' ) |
1718 | 1.50M | || ( base64_character1 == (uint32_t) '\v' ) ) |
1719 | 216k | { |
1720 | 216k | if( ( flags & LIBUNA_BASE64_FLAG_STRIP_WHITESPACE ) != 0 ) |
1721 | 216k | { |
1722 | 216k | if( strip_mode == LIBUNA_STRIP_MODE_NON_WHITESPACE ) |
1723 | 3.78k | { |
1724 | 3.78k | strip_mode = LIBUNA_STRIP_MODE_TRAILING_WHITESPACE; |
1725 | 3.78k | } |
1726 | 216k | if( ( strip_mode != LIBUNA_STRIP_MODE_LEADING_WHITESPACE ) |
1727 | 216k | && ( strip_mode != LIBUNA_STRIP_MODE_TRAILING_WHITESPACE ) ) |
1728 | 0 | { |
1729 | 0 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
1730 | 0 | } |
1731 | 216k | else |
1732 | 216k | { |
1733 | 216k | whitespace_size += base64_character_size; |
1734 | 216k | } |
1735 | 216k | } |
1736 | 0 | else |
1737 | 0 | { |
1738 | 0 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
1739 | 0 | } |
1740 | 216k | } |
1741 | 1.28M | else if( strip_mode == LIBUNA_STRIP_MODE_LEADING_WHITESPACE ) |
1742 | 20.3k | { |
1743 | 20.3k | strip_mode = LIBUNA_STRIP_MODE_NON_WHITESPACE; |
1744 | 20.3k | } |
1745 | 1.26M | else if( strip_mode == LIBUNA_STRIP_MODE_TRAILING_WHITESPACE ) |
1746 | 9 | { |
1747 | 9 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
1748 | 9 | } |
1749 | 1.52M | if( strip_mode == LIBUNA_STRIP_MODE_NON_WHITESPACE ) |
1750 | 1.28M | { |
1751 | | /* A-Z is not a continous range on an EBCDIC based system |
1752 | | * it consists of the ranges: A-I, J-R, S-Z |
1753 | | */ |
1754 | 1.28M | if( ( base64_character1 >= (uint32_t) 'A' ) |
1755 | 1.28M | && ( base64_character1 <= (uint32_t) 'I' ) ) |
1756 | 1.15M | { |
1757 | 1.15M | number_of_characters++; |
1758 | 1.15M | } |
1759 | 132k | else if( ( base64_character1 >= (uint32_t) 'J' ) |
1760 | 132k | && ( base64_character1 <= (uint32_t) 'R' ) ) |
1761 | 7.35k | { |
1762 | 7.35k | number_of_characters++; |
1763 | 7.35k | } |
1764 | 125k | else if( ( base64_character1 >= (uint32_t) 'S' ) |
1765 | 125k | && ( base64_character1 <= (uint32_t) 'Z' ) ) |
1766 | 6.13k | { |
1767 | 6.13k | number_of_characters++; |
1768 | 6.13k | } |
1769 | | /* a-z is not a continous range on an EBCDIC based system |
1770 | | * it consists of the ranges: a-i, j-r, s-z |
1771 | | */ |
1772 | 119k | else if( ( base64_character1 >= (uint32_t) 'a' ) |
1773 | 119k | && ( base64_character1 <= (uint32_t) 'i' ) ) |
1774 | 35.2k | { |
1775 | 35.2k | number_of_characters++; |
1776 | 35.2k | } |
1777 | 84.2k | else if( ( base64_character1 >= (uint32_t) 'j' ) |
1778 | 84.2k | && ( base64_character1 <= (uint32_t) 'r' ) ) |
1779 | 12.1k | { |
1780 | 12.1k | number_of_characters++; |
1781 | 12.1k | } |
1782 | 72.0k | else if( ( base64_character1 >= (uint32_t) 's' ) |
1783 | 72.0k | && ( base64_character1 <= (uint32_t) 'z' ) ) |
1784 | 10.6k | { |
1785 | 10.6k | number_of_characters++; |
1786 | 10.6k | } |
1787 | 61.4k | else if( ( base64_character1 >= (uint32_t) '0' ) |
1788 | 61.4k | && ( base64_character1 <= (uint32_t) '9' ) ) |
1789 | 12.3k | { |
1790 | 12.3k | number_of_characters++; |
1791 | 12.3k | } |
1792 | 49.0k | else if( ( base64_character1 == (uint32_t) base64_character_62 ) |
1793 | 49.0k | || ( base64_character1 == (uint32_t) base64_character_63 ) ) |
1794 | 49.0k | { |
1795 | 49.0k | number_of_characters++; |
1796 | 49.0k | } |
1797 | 43 | else |
1798 | 43 | { |
1799 | 43 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
1800 | 43 | } |
1801 | 1.28M | } |
1802 | 1.52M | if( strip_mode == LIBUNA_STRIP_MODE_INVALID_CHARACTER ) |
1803 | 56 | { |
1804 | 56 | libcerror_error_set( |
1805 | 56 | error, |
1806 | 56 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
1807 | 56 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
1808 | 56 | "%s: invalid character in base64 stream at index: %" PRIzd ".", |
1809 | 56 | function, |
1810 | 56 | base64_stream_index - base64_character_size ); |
1811 | | |
1812 | 56 | return( -1 ); |
1813 | 56 | } |
1814 | 1.52M | } |
1815 | 1.88k | if( character_limit != 0 ) |
1816 | 0 | { |
1817 | 0 | if( number_of_characters > (size_t) character_limit ) |
1818 | 0 | { |
1819 | 0 | libcerror_error_set( |
1820 | 0 | error, |
1821 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
1822 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
1823 | 0 | "%s: number of characters in last line exceed maximum.", |
1824 | 0 | function ); |
1825 | |
|
1826 | 0 | return( -1 ); |
1827 | 0 | } |
1828 | 0 | } |
1829 | 1.88k | base64_stream_size -= whitespace_size; |
1830 | | |
1831 | | /* Make sure the byte stream is able to hold |
1832 | | * at least 3 bytes for each 4 base64 characters |
1833 | | */ |
1834 | 1.88k | base64_character_size *= 4; |
1835 | | |
1836 | 1.88k | safe_byte_stream_size = base64_stream_size / base64_character_size; |
1837 | | |
1838 | 1.88k | if( ( base64_stream_size % base64_character_size ) != 0 ) |
1839 | 51 | { |
1840 | 51 | safe_byte_stream_size += 1; |
1841 | 51 | } |
1842 | 1.88k | safe_byte_stream_size *= 3; |
1843 | | |
1844 | | /* The padding size contains the number of bytes to correct |
1845 | | */ |
1846 | 1.88k | *byte_stream_size = safe_byte_stream_size - padding_size; |
1847 | | |
1848 | 1.88k | return( 1 ); |
1849 | 1.88k | } |
1850 | | |
1851 | | /* Copies a byte stream from a base64 stream |
1852 | | * |
1853 | | * LIBUNA_BASE64_FLAG_STRIP_WHITESPACE removes leading space and tab characters, |
1854 | | * and trailing space, tab and end of line characters |
1855 | | * |
1856 | | * Returns 1 if successful or -1 on error |
1857 | | */ |
1858 | | int libuna_base64_stream_copy_to_byte_stream( |
1859 | | const uint8_t *base64_stream, |
1860 | | size_t base64_stream_size, |
1861 | | uint8_t *byte_stream, |
1862 | | size_t byte_stream_size, |
1863 | | uint32_t base64_variant, |
1864 | | uint8_t flags, |
1865 | | libcerror_error_t **error ) |
1866 | 1.88k | { |
1867 | 1.88k | static char *function = "libuna_base64_stream_copy_to_byte_stream"; |
1868 | 1.88k | size_t base64_character_size = 0; |
1869 | 1.88k | size_t base64_stream_index = 0; |
1870 | 1.88k | size_t byte_stream_index = 0; |
1871 | 1.88k | size_t number_of_characters = 0; |
1872 | 1.88k | size_t whitespace_size = 0; |
1873 | 1.88k | uint32_t base64_character1 = 0; |
1874 | 1.88k | uint32_t base64_character2 = 0; |
1875 | 1.88k | uint32_t base64_triplet = 0; |
1876 | 1.88k | uint8_t character_limit = 0; |
1877 | 1.88k | uint8_t padding_size = 0; |
1878 | 1.88k | uint8_t strip_mode = LIBUNA_STRIP_MODE_LEADING_WHITESPACE; |
1879 | | |
1880 | 1.88k | if( base64_stream == NULL ) |
1881 | 0 | { |
1882 | 0 | libcerror_error_set( |
1883 | 0 | error, |
1884 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1885 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1886 | 0 | "%s: invalid base64 stream.", |
1887 | 0 | function ); |
1888 | |
|
1889 | 0 | return( -1 ); |
1890 | 0 | } |
1891 | 1.88k | if( base64_stream_size > (size_t) SSIZE_MAX ) |
1892 | 0 | { |
1893 | 0 | libcerror_error_set( |
1894 | 0 | error, |
1895 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1896 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
1897 | 0 | "%s: invalid base64 stream size value exceeds maximum.", |
1898 | 0 | function ); |
1899 | |
|
1900 | 0 | return( -1 ); |
1901 | 0 | } |
1902 | 1.88k | if( byte_stream == NULL ) |
1903 | 0 | { |
1904 | 0 | libcerror_error_set( |
1905 | 0 | error, |
1906 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1907 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
1908 | 0 | "%s: invalid byte stream.", |
1909 | 0 | function ); |
1910 | |
|
1911 | 0 | return( -1 ); |
1912 | 0 | } |
1913 | 1.88k | if( byte_stream_size > (size_t) SSIZE_MAX ) |
1914 | 0 | { |
1915 | 0 | libcerror_error_set( |
1916 | 0 | error, |
1917 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1918 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
1919 | 0 | "%s: invalid byte stream size value exceeds maximum.", |
1920 | 0 | function ); |
1921 | |
|
1922 | 0 | return( -1 ); |
1923 | 0 | } |
1924 | 1.88k | switch( base64_variant & 0x000000ffUL ) |
1925 | 1.88k | { |
1926 | 1.88k | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_NONE: |
1927 | 1.88k | character_limit = 0; |
1928 | | |
1929 | 1.88k | break; |
1930 | | |
1931 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_64: |
1932 | 0 | character_limit = 64; |
1933 | |
|
1934 | 0 | break; |
1935 | | |
1936 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_76: |
1937 | 0 | character_limit = 76; |
1938 | |
|
1939 | 0 | break; |
1940 | | |
1941 | 0 | default: |
1942 | 0 | libcerror_error_set( |
1943 | 0 | error, |
1944 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1945 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
1946 | 0 | "%s: unsupported base64 variant.", |
1947 | 0 | function ); |
1948 | |
|
1949 | 0 | return( -1 ); |
1950 | 1.88k | } |
1951 | 1.88k | switch( base64_variant & 0xf0000000UL ) |
1952 | 1.88k | { |
1953 | 1.88k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
1954 | 1.88k | base64_character_size = 1; |
1955 | 1.88k | break; |
1956 | | |
1957 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
1958 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
1959 | 0 | base64_character_size = 2; |
1960 | 0 | break; |
1961 | | |
1962 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
1963 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
1964 | 0 | base64_character_size = 4; |
1965 | 0 | break; |
1966 | | |
1967 | 0 | default: |
1968 | 0 | libcerror_error_set( |
1969 | 0 | error, |
1970 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1971 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
1972 | 0 | "%s: unsupported base64 variant.", |
1973 | 0 | function ); |
1974 | |
|
1975 | 0 | return( -1 ); |
1976 | 1.88k | } |
1977 | 1.88k | if( base64_stream_size < base64_character_size ) |
1978 | 0 | { |
1979 | 0 | libcerror_error_set( |
1980 | 0 | error, |
1981 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1982 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
1983 | 0 | "%s: invalid base64 stream value too small.", |
1984 | 0 | function ); |
1985 | |
|
1986 | 0 | return( -1 ); |
1987 | 0 | } |
1988 | 1.88k | if( ( flags & ~( LIBUNA_BASE64_FLAG_STRIP_WHITESPACE ) ) != 0 ) |
1989 | 0 | { |
1990 | 0 | libcerror_error_set( |
1991 | 0 | error, |
1992 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
1993 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
1994 | 0 | "%s: unsupported flags.", |
1995 | 0 | function ); |
1996 | |
|
1997 | 0 | return( -1 ); |
1998 | 0 | } |
1999 | 1.88k | base64_stream_index = base64_stream_size - base64_character_size; |
2000 | 1.88k | whitespace_size = 0; |
2001 | | |
2002 | 131k | while( base64_stream_index > base64_character_size ) |
2003 | 131k | { |
2004 | 131k | switch( base64_variant & 0xf0000000UL ) |
2005 | 131k | { |
2006 | 131k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
2007 | 131k | base64_character1 = base64_stream[ base64_stream_index ]; |
2008 | 131k | break; |
2009 | | |
2010 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
2011 | 0 | byte_stream_copy_to_uint16_big_endian( |
2012 | 0 | &( base64_stream[ base64_stream_index ] ), |
2013 | 0 | base64_character1 ); |
2014 | 0 | break; |
2015 | | |
2016 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
2017 | 0 | byte_stream_copy_to_uint16_little_endian( |
2018 | 0 | &( base64_stream[ base64_stream_index ] ), |
2019 | 0 | base64_character1 ); |
2020 | 0 | break; |
2021 | | |
2022 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
2023 | 0 | byte_stream_copy_to_uint32_big_endian( |
2024 | 0 | &( base64_stream[ base64_stream_index ] ), |
2025 | 0 | base64_character1 ); |
2026 | 0 | break; |
2027 | | |
2028 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
2029 | 0 | byte_stream_copy_to_uint32_little_endian( |
2030 | 0 | &( base64_stream[ base64_stream_index ] ), |
2031 | 0 | base64_character1 ); |
2032 | 0 | break; |
2033 | 131k | } |
2034 | 131k | base64_stream_index -= base64_character_size; |
2035 | | |
2036 | 131k | if( ( base64_character1 == (uint32_t) '\n' ) |
2037 | 131k | || ( base64_character1 == (uint32_t) '\r' ) ) |
2038 | 2.87k | { |
2039 | 2.87k | whitespace_size += base64_character_size; |
2040 | 2.87k | } |
2041 | 128k | else if( ( flags & LIBUNA_BASE64_FLAG_STRIP_WHITESPACE ) == 0 ) |
2042 | 0 | { |
2043 | 0 | break; |
2044 | 0 | } |
2045 | 128k | else if( ( base64_character1 == (uint32_t) ' ' ) |
2046 | 128k | || ( base64_character1 == (uint32_t) '\t' ) |
2047 | 128k | || ( base64_character1 == (uint32_t) '\v' ) ) |
2048 | 126k | { |
2049 | 126k | whitespace_size += base64_character_size; |
2050 | 126k | } |
2051 | 1.88k | else |
2052 | 1.88k | { |
2053 | 1.88k | break; |
2054 | 1.88k | } |
2055 | 131k | } |
2056 | 1.88k | base64_stream_size -= whitespace_size; |
2057 | 1.88k | base64_stream_index = 0; |
2058 | | |
2059 | 1.88k | if( ( flags & LIBUNA_BASE64_FLAG_STRIP_WHITESPACE ) == 0 ) |
2060 | 0 | { |
2061 | 0 | strip_mode = LIBUNA_STRIP_MODE_NON_WHITESPACE; |
2062 | 0 | } |
2063 | 473k | while( base64_stream_index < base64_stream_size ) |
2064 | 471k | { |
2065 | 471k | switch( base64_variant & 0xf0000000UL ) |
2066 | 471k | { |
2067 | 471k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
2068 | 471k | base64_character1 = base64_stream[ base64_stream_index ]; |
2069 | 471k | break; |
2070 | | |
2071 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
2072 | 0 | byte_stream_copy_to_uint16_big_endian( |
2073 | 0 | &( base64_stream[ base64_stream_index ] ), |
2074 | 0 | base64_character1 ); |
2075 | 0 | break; |
2076 | | |
2077 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
2078 | 0 | byte_stream_copy_to_uint16_little_endian( |
2079 | 0 | &( base64_stream[ base64_stream_index ] ), |
2080 | 0 | base64_character1 ); |
2081 | 0 | break; |
2082 | | |
2083 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
2084 | 0 | byte_stream_copy_to_uint32_big_endian( |
2085 | 0 | &( base64_stream[ base64_stream_index ] ), |
2086 | 0 | base64_character1 ); |
2087 | 0 | break; |
2088 | | |
2089 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
2090 | 0 | byte_stream_copy_to_uint32_little_endian( |
2091 | 0 | &( base64_stream[ base64_stream_index ] ), |
2092 | 0 | base64_character1 ); |
2093 | 0 | break; |
2094 | 471k | } |
2095 | 471k | base64_stream_index += base64_character_size; |
2096 | | |
2097 | 471k | if( ( base64_character1 == (uint32_t) '\n' ) |
2098 | 471k | || ( base64_character1 == (uint32_t) '\r' ) ) |
2099 | 15.9k | { |
2100 | 15.9k | if( ( strip_mode != LIBUNA_STRIP_MODE_NON_WHITESPACE ) |
2101 | 15.9k | && ( strip_mode != LIBUNA_STRIP_MODE_TRAILING_WHITESPACE ) ) |
2102 | 0 | { |
2103 | 0 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
2104 | 0 | } |
2105 | 15.9k | else |
2106 | 15.9k | { |
2107 | 15.9k | if( ( base64_stream_index + base64_character_size ) < base64_stream_size ) |
2108 | 15.9k | { |
2109 | 15.9k | switch( base64_variant & 0xf0000000UL ) |
2110 | 15.9k | { |
2111 | 15.9k | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
2112 | 15.9k | base64_character2 = base64_stream[ base64_stream_index ]; |
2113 | 15.9k | break; |
2114 | | |
2115 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
2116 | 0 | byte_stream_copy_to_uint16_big_endian( |
2117 | 0 | &( base64_stream[ base64_stream_index ] ), |
2118 | 0 | base64_character2 ); |
2119 | 0 | break; |
2120 | | |
2121 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
2122 | 0 | byte_stream_copy_to_uint16_little_endian( |
2123 | 0 | &( base64_stream[ base64_stream_index ] ), |
2124 | 0 | base64_character2 ); |
2125 | 0 | break; |
2126 | | |
2127 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
2128 | 0 | byte_stream_copy_to_uint32_big_endian( |
2129 | 0 | &( base64_stream[ base64_stream_index ] ), |
2130 | 0 | base64_character2 ); |
2131 | 0 | break; |
2132 | | |
2133 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
2134 | 0 | byte_stream_copy_to_uint32_little_endian( |
2135 | 0 | &( base64_stream[ base64_stream_index ] ), |
2136 | 0 | base64_character2 ); |
2137 | 0 | break; |
2138 | 15.9k | } |
2139 | 15.9k | if( ( base64_character2 == (uint32_t) '\n' ) |
2140 | 15.9k | || ( base64_character2 == (uint32_t) '\r' ) ) |
2141 | 1.14k | { |
2142 | 1.14k | base64_stream_index += base64_character_size; |
2143 | 1.14k | } |
2144 | 15.9k | } |
2145 | 15.9k | strip_mode = LIBUNA_STRIP_MODE_LEADING_WHITESPACE; |
2146 | 15.9k | } |
2147 | 15.9k | if( character_limit != 0 ) |
2148 | 0 | { |
2149 | 0 | if( number_of_characters != (size_t) character_limit ) |
2150 | 0 | { |
2151 | 0 | libcerror_error_set( |
2152 | 0 | error, |
2153 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
2154 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
2155 | 0 | "%s: number of characters in line does not match character limit.", |
2156 | 0 | function ); |
2157 | |
|
2158 | 0 | return( -1 ); |
2159 | 0 | } |
2160 | 0 | number_of_characters = 0; |
2161 | 0 | } |
2162 | 15.9k | } |
2163 | 455k | else if( ( base64_character1 == (uint32_t) ' ' ) |
2164 | 455k | || ( base64_character1 == (uint32_t) '\t' ) |
2165 | 455k | || ( base64_character1 == (uint32_t) '\v' ) ) |
2166 | 163k | { |
2167 | 163k | if( ( flags & LIBUNA_BASE64_FLAG_STRIP_WHITESPACE ) != 0 ) |
2168 | 163k | { |
2169 | 163k | if( strip_mode == LIBUNA_STRIP_MODE_NON_WHITESPACE ) |
2170 | 2.22k | { |
2171 | 2.22k | strip_mode = LIBUNA_STRIP_MODE_TRAILING_WHITESPACE; |
2172 | 2.22k | } |
2173 | 163k | if( ( strip_mode != LIBUNA_STRIP_MODE_LEADING_WHITESPACE ) |
2174 | 163k | && ( strip_mode != LIBUNA_STRIP_MODE_TRAILING_WHITESPACE ) ) |
2175 | 0 | { |
2176 | 0 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
2177 | 0 | } |
2178 | 163k | } |
2179 | 0 | else |
2180 | 0 | { |
2181 | 0 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
2182 | 0 | } |
2183 | 163k | } |
2184 | 292k | else if( strip_mode == LIBUNA_STRIP_MODE_LEADING_WHITESPACE ) |
2185 | 17.8k | { |
2186 | 17.8k | strip_mode = LIBUNA_STRIP_MODE_NON_WHITESPACE; |
2187 | 17.8k | } |
2188 | 274k | else if( strip_mode == LIBUNA_STRIP_MODE_TRAILING_WHITESPACE ) |
2189 | 1 | { |
2190 | 1 | strip_mode = LIBUNA_STRIP_MODE_INVALID_CHARACTER; |
2191 | 1 | } |
2192 | 471k | if( strip_mode == LIBUNA_STRIP_MODE_INVALID_CHARACTER ) |
2193 | 1 | { |
2194 | 1 | libcerror_error_set( |
2195 | 1 | error, |
2196 | 1 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
2197 | 1 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
2198 | 1 | "%s: invalid character in base64 stream at index: %" PRIzd ".", |
2199 | 1 | function, |
2200 | 1 | base64_stream_index - base64_character_size ); |
2201 | | |
2202 | 1 | return( -1 ); |
2203 | 1 | } |
2204 | 471k | if( strip_mode == LIBUNA_STRIP_MODE_NON_WHITESPACE ) |
2205 | 292k | { |
2206 | 292k | if( padding_size > 0 ) |
2207 | 1 | { |
2208 | 1 | libcerror_error_set( |
2209 | 1 | error, |
2210 | 1 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2211 | 1 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
2212 | 1 | "%s: invalid 1st base64 sixtet.", |
2213 | 1 | function ); |
2214 | | |
2215 | 1 | return( -1 ); |
2216 | 1 | } |
2217 | 292k | base64_stream_index -= base64_character_size; |
2218 | | |
2219 | | /* Convert the base64 stream into a base64 triplet |
2220 | | */ |
2221 | 292k | if( libuna_base64_triplet_copy_from_base64_stream( |
2222 | 292k | &base64_triplet, |
2223 | 292k | base64_stream, |
2224 | 292k | base64_stream_size, |
2225 | 292k | &base64_stream_index, |
2226 | 292k | &padding_size, |
2227 | 292k | base64_variant, |
2228 | 292k | error ) != 1 ) |
2229 | 54 | { |
2230 | 54 | libcerror_error_set( |
2231 | 54 | error, |
2232 | 54 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
2233 | 54 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
2234 | 54 | "%s: unable to copy base64 triplet from base64 stream.", |
2235 | 54 | function ); |
2236 | | |
2237 | 54 | return( -1 ); |
2238 | 54 | } |
2239 | | /* Convert the base64 triplet into a byte stream |
2240 | | */ |
2241 | 292k | if( libuna_base64_triplet_copy_to_byte_stream( |
2242 | 292k | base64_triplet, |
2243 | 292k | byte_stream, |
2244 | 292k | byte_stream_size, |
2245 | 292k | &byte_stream_index, |
2246 | 292k | padding_size, |
2247 | 292k | error ) != 1 ) |
2248 | 0 | { |
2249 | 0 | libcerror_error_set( |
2250 | 0 | error, |
2251 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
2252 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
2253 | 0 | "%s: unable to copy base64 triplet to byte stream.", |
2254 | 0 | function ); |
2255 | |
|
2256 | 0 | return( -1 ); |
2257 | 0 | } |
2258 | 292k | number_of_characters += 4 - padding_size; |
2259 | 292k | } |
2260 | 471k | } |
2261 | 1.83k | if( character_limit != 0 ) |
2262 | 0 | { |
2263 | 0 | if( number_of_characters > (size_t) character_limit ) |
2264 | 0 | { |
2265 | 0 | libcerror_error_set( |
2266 | 0 | error, |
2267 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
2268 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
2269 | 0 | "%s: number of characters in last line exceed maximum.", |
2270 | 0 | function ); |
2271 | |
|
2272 | 0 | return( -1 ); |
2273 | 0 | } |
2274 | 0 | } |
2275 | 1.83k | return( 1 ); |
2276 | 1.83k | } |
2277 | | |
2278 | | /* Determines the size of a base64 stream from a byte stream |
2279 | | * Returns 1 if successful or -1 on error |
2280 | | */ |
2281 | | int libuna_base64_stream_size_from_byte_stream( |
2282 | | const uint8_t *byte_stream, |
2283 | | size_t byte_stream_size, |
2284 | | size_t *base64_stream_size, |
2285 | | uint32_t base64_variant, |
2286 | | libcerror_error_t **error ) |
2287 | 0 | { |
2288 | 0 | static char *function = "libuna_base64_stream_size_from_byte_stream"; |
2289 | 0 | size_t base64_character_size = 0; |
2290 | 0 | size_t calculated_base64_stream_size = 0; |
2291 | 0 | size_t remaining_size = 0; |
2292 | 0 | size_t whitespace_size = 0; |
2293 | 0 | uint8_t character_limit = 0; |
2294 | 0 | uint8_t padding_character = 0; |
2295 | |
|
2296 | 0 | if( byte_stream == NULL ) |
2297 | 0 | { |
2298 | 0 | libcerror_error_set( |
2299 | 0 | error, |
2300 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2301 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
2302 | 0 | "%s: invalid byte stream.", |
2303 | 0 | function ); |
2304 | |
|
2305 | 0 | return( -1 ); |
2306 | 0 | } |
2307 | 0 | if( byte_stream_size > (size_t) SSIZE_MAX ) |
2308 | 0 | { |
2309 | 0 | libcerror_error_set( |
2310 | 0 | error, |
2311 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2312 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
2313 | 0 | "%s: invalid byte stream size value exceeds maximum.", |
2314 | 0 | function ); |
2315 | |
|
2316 | 0 | return( -1 ); |
2317 | 0 | } |
2318 | 0 | if( base64_stream_size == NULL ) |
2319 | 0 | { |
2320 | 0 | libcerror_error_set( |
2321 | 0 | error, |
2322 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2323 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
2324 | 0 | "%s: invalid base64 stream size.", |
2325 | 0 | function ); |
2326 | |
|
2327 | 0 | return( -1 ); |
2328 | 0 | } |
2329 | 0 | switch( base64_variant & 0x000000ffUL ) |
2330 | 0 | { |
2331 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_NONE: |
2332 | 0 | character_limit = 0; |
2333 | |
|
2334 | 0 | break; |
2335 | | |
2336 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_64: |
2337 | 0 | character_limit = 64; |
2338 | |
|
2339 | 0 | break; |
2340 | | |
2341 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_76: |
2342 | 0 | character_limit = 76; |
2343 | |
|
2344 | 0 | break; |
2345 | | |
2346 | 0 | default: |
2347 | 0 | libcerror_error_set( |
2348 | 0 | error, |
2349 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2350 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
2351 | 0 | "%s: unsupported base64 variant.", |
2352 | 0 | function ); |
2353 | |
|
2354 | 0 | return( -1 ); |
2355 | 0 | } |
2356 | 0 | switch( base64_variant & 0x0f000000UL ) |
2357 | 0 | { |
2358 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_NONE: |
2359 | 0 | padding_character = 0; |
2360 | 0 | break; |
2361 | | |
2362 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_OPTIONAL: |
2363 | 0 | padding_character = (uint8_t) '='; |
2364 | 0 | break; |
2365 | | |
2366 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_REQUIRED: |
2367 | 0 | padding_character = (uint8_t) '='; |
2368 | 0 | break; |
2369 | | |
2370 | 0 | default: |
2371 | 0 | libcerror_error_set( |
2372 | 0 | error, |
2373 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2374 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
2375 | 0 | "%s: unsupported base64 variant.", |
2376 | 0 | function ); |
2377 | |
|
2378 | 0 | return( -1 ); |
2379 | 0 | } |
2380 | 0 | switch( base64_variant & 0xf0000000UL ) |
2381 | 0 | { |
2382 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
2383 | 0 | base64_character_size = 1; |
2384 | 0 | break; |
2385 | | |
2386 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
2387 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
2388 | 0 | base64_character_size = 2; |
2389 | 0 | break; |
2390 | | |
2391 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
2392 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
2393 | 0 | base64_character_size = 4; |
2394 | 0 | break; |
2395 | | |
2396 | 0 | default: |
2397 | 0 | libcerror_error_set( |
2398 | 0 | error, |
2399 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2400 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
2401 | 0 | "%s: unsupported base64 variant.", |
2402 | 0 | function ); |
2403 | |
|
2404 | 0 | return( -1 ); |
2405 | 0 | } |
2406 | | /* Make sure the base64 stream is able to hold |
2407 | | * at least 4 base64 characters for each 3 bytes |
2408 | | */ |
2409 | 0 | calculated_base64_stream_size = ( byte_stream_size / 3 ) * 4; |
2410 | |
|
2411 | 0 | remaining_size = byte_stream_size % 3; |
2412 | |
|
2413 | 0 | if( remaining_size != 0 ) |
2414 | 0 | { |
2415 | 0 | if( padding_character != 0 ) |
2416 | 0 | { |
2417 | 0 | calculated_base64_stream_size += 4; |
2418 | 0 | } |
2419 | 0 | else if( remaining_size == 1 ) |
2420 | 0 | { |
2421 | 0 | calculated_base64_stream_size += 2; |
2422 | 0 | } |
2423 | 0 | else if( remaining_size == 2 ) |
2424 | 0 | { |
2425 | 0 | calculated_base64_stream_size += 3; |
2426 | 0 | } |
2427 | 0 | } |
2428 | 0 | if( character_limit != 0 ) |
2429 | 0 | { |
2430 | 0 | if( calculated_base64_stream_size > character_limit ) |
2431 | 0 | { |
2432 | 0 | whitespace_size = calculated_base64_stream_size / character_limit; |
2433 | |
|
2434 | 0 | if( ( calculated_base64_stream_size % character_limit ) != 0 ) |
2435 | 0 | { |
2436 | 0 | whitespace_size += 1; |
2437 | 0 | } |
2438 | 0 | calculated_base64_stream_size += whitespace_size; |
2439 | 0 | } |
2440 | 0 | calculated_base64_stream_size += 1; |
2441 | 0 | } |
2442 | 0 | calculated_base64_stream_size *= base64_character_size; |
2443 | |
|
2444 | 0 | *base64_stream_size = calculated_base64_stream_size; |
2445 | |
|
2446 | 0 | return( 1 ); |
2447 | 0 | } |
2448 | | |
2449 | | /* Copies a base64 stream from a byte stream |
2450 | | * Returns 1 if successful or -1 on error |
2451 | | */ |
2452 | | int libuna_base64_stream_copy_from_byte_stream( |
2453 | | uint8_t *base64_stream, |
2454 | | size_t base64_stream_size, |
2455 | | const uint8_t *byte_stream, |
2456 | | size_t byte_stream_size, |
2457 | | uint32_t base64_variant, |
2458 | | libcerror_error_t **error ) |
2459 | 0 | { |
2460 | 0 | static char *function = "libuna_base64_stream_copy_from_byte_stream"; |
2461 | 0 | size_t base64_stream_index = 0; |
2462 | |
|
2463 | 0 | if( libuna_base64_stream_with_index_copy_from_byte_stream( |
2464 | 0 | base64_stream, |
2465 | 0 | base64_stream_size, |
2466 | 0 | &base64_stream_index, |
2467 | 0 | byte_stream, |
2468 | 0 | byte_stream_size, |
2469 | 0 | base64_variant, |
2470 | 0 | error ) != 1 ) |
2471 | 0 | { |
2472 | 0 | libcerror_error_set( |
2473 | 0 | error, |
2474 | 0 | LIBCERROR_ERROR_DOMAIN_RUNTIME, |
2475 | 0 | LIBCERROR_RUNTIME_ERROR_COPY_FAILED, |
2476 | 0 | "%s: unable to copy base64 stream from byte stream.", |
2477 | 0 | function ); |
2478 | |
|
2479 | 0 | return( -1 ); |
2480 | 0 | } |
2481 | 0 | return( 1 ); |
2482 | 0 | } |
2483 | | |
2484 | | /* Copies a base64 stream from a byte stream |
2485 | | * Returns 1 if successful or -1 on error |
2486 | | */ |
2487 | | int libuna_base64_stream_with_index_copy_from_byte_stream( |
2488 | | uint8_t *base64_stream, |
2489 | | size_t base64_stream_size, |
2490 | | size_t *base64_stream_index, |
2491 | | const uint8_t *byte_stream, |
2492 | | size_t byte_stream_size, |
2493 | | uint32_t base64_variant, |
2494 | | libcerror_error_t **error ) |
2495 | 0 | { |
2496 | 0 | static char *function = "libuna_base64_stream_with_index_copy_from_byte_stream"; |
2497 | 0 | size_t base64_character_size = 0; |
2498 | 0 | size_t calculated_base64_stream_size = 0; |
2499 | 0 | size_t byte_stream_index = 0; |
2500 | 0 | size_t number_of_characters = 0; |
2501 | 0 | size_t remaining_size = 0; |
2502 | 0 | size_t safe_base64_stream_index = 0; |
2503 | 0 | size_t whitespace_size = 0; |
2504 | 0 | uint32_t base64_character = 0; |
2505 | 0 | uint32_t base64_triplet = 0; |
2506 | 0 | uint8_t character_limit = 0; |
2507 | 0 | uint8_t padding_character = 0; |
2508 | 0 | uint8_t padding_size = 0; |
2509 | |
|
2510 | 0 | if( base64_stream == NULL ) |
2511 | 0 | { |
2512 | 0 | libcerror_error_set( |
2513 | 0 | error, |
2514 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2515 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
2516 | 0 | "%s: invalid base64 stream.", |
2517 | 0 | function ); |
2518 | |
|
2519 | 0 | return( -1 ); |
2520 | 0 | } |
2521 | 0 | if( base64_stream_size > (size_t) SSIZE_MAX ) |
2522 | 0 | { |
2523 | 0 | libcerror_error_set( |
2524 | 0 | error, |
2525 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2526 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
2527 | 0 | "%s: invalid base64 stream size value exceeds maximum.", |
2528 | 0 | function ); |
2529 | |
|
2530 | 0 | return( -1 ); |
2531 | 0 | } |
2532 | 0 | if( base64_stream_index == NULL ) |
2533 | 0 | { |
2534 | 0 | libcerror_error_set( |
2535 | 0 | error, |
2536 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2537 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
2538 | 0 | "%s: invalid base64 stream index.", |
2539 | 0 | function ); |
2540 | |
|
2541 | 0 | return( -1 ); |
2542 | 0 | } |
2543 | 0 | if( *base64_stream_index >= base64_stream_size ) |
2544 | 0 | { |
2545 | 0 | libcerror_error_set( |
2546 | 0 | error, |
2547 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2548 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
2549 | 0 | "%s: base64 stream string too small.", |
2550 | 0 | function ); |
2551 | |
|
2552 | 0 | return( -1 ); |
2553 | 0 | } |
2554 | 0 | if( byte_stream == NULL ) |
2555 | 0 | { |
2556 | 0 | libcerror_error_set( |
2557 | 0 | error, |
2558 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2559 | 0 | LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE, |
2560 | 0 | "%s: invalid byte stream.", |
2561 | 0 | function ); |
2562 | |
|
2563 | 0 | return( -1 ); |
2564 | 0 | } |
2565 | 0 | if( byte_stream_size > (size_t) SSIZE_MAX ) |
2566 | 0 | { |
2567 | 0 | libcerror_error_set( |
2568 | 0 | error, |
2569 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2570 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_EXCEEDS_MAXIMUM, |
2571 | 0 | "%s: invalid byte stream size value exceeds maximum.", |
2572 | 0 | function ); |
2573 | |
|
2574 | 0 | return( -1 ); |
2575 | 0 | } |
2576 | 0 | switch( base64_variant & 0x000000ffUL ) |
2577 | 0 | { |
2578 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_NONE: |
2579 | 0 | character_limit = 0; |
2580 | |
|
2581 | 0 | break; |
2582 | | |
2583 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_64: |
2584 | 0 | character_limit = 64; |
2585 | |
|
2586 | 0 | break; |
2587 | | |
2588 | 0 | case LIBUNA_BASE64_VARIANT_CHARACTER_LIMIT_76: |
2589 | 0 | character_limit = 76; |
2590 | |
|
2591 | 0 | break; |
2592 | | |
2593 | 0 | default: |
2594 | 0 | libcerror_error_set( |
2595 | 0 | error, |
2596 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2597 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
2598 | 0 | "%s: unsupported base64 variant.", |
2599 | 0 | function ); |
2600 | |
|
2601 | 0 | return( -1 ); |
2602 | 0 | } |
2603 | 0 | switch( base64_variant & 0x0f000000UL ) |
2604 | 0 | { |
2605 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_NONE: |
2606 | 0 | padding_character = 0; |
2607 | 0 | break; |
2608 | | |
2609 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_OPTIONAL: |
2610 | 0 | padding_character = (uint8_t) '='; |
2611 | 0 | break; |
2612 | | |
2613 | 0 | case LIBUNA_BASE64_VARIANT_PADDING_REQUIRED: |
2614 | 0 | padding_character = (uint8_t) '='; |
2615 | 0 | break; |
2616 | | |
2617 | 0 | default: |
2618 | 0 | libcerror_error_set( |
2619 | 0 | error, |
2620 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2621 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
2622 | 0 | "%s: unsupported base64 variant.", |
2623 | 0 | function ); |
2624 | |
|
2625 | 0 | return( -1 ); |
2626 | 0 | } |
2627 | 0 | switch( base64_variant & 0xf0000000UL ) |
2628 | 0 | { |
2629 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
2630 | 0 | base64_character_size = 1; |
2631 | 0 | break; |
2632 | | |
2633 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
2634 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
2635 | 0 | base64_character_size = 2; |
2636 | 0 | break; |
2637 | | |
2638 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
2639 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
2640 | 0 | base64_character_size = 4; |
2641 | 0 | break; |
2642 | | |
2643 | 0 | default: |
2644 | 0 | libcerror_error_set( |
2645 | 0 | error, |
2646 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2647 | 0 | LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE, |
2648 | 0 | "%s: unsupported base64 variant.", |
2649 | 0 | function ); |
2650 | |
|
2651 | 0 | return( -1 ); |
2652 | 0 | } |
2653 | 0 | safe_base64_stream_index = *base64_stream_index; |
2654 | | |
2655 | | /* Make sure the base64 stream is able to hold |
2656 | | * at least 4 base64 characters for each 3 bytes |
2657 | | */ |
2658 | 0 | calculated_base64_stream_size = ( byte_stream_size / 3 ) * 4; |
2659 | |
|
2660 | 0 | remaining_size = byte_stream_size % 3; |
2661 | |
|
2662 | 0 | if( remaining_size != 0 ) |
2663 | 0 | { |
2664 | 0 | if( padding_character != 0 ) |
2665 | 0 | { |
2666 | 0 | calculated_base64_stream_size += 4; |
2667 | 0 | } |
2668 | 0 | else if( remaining_size == 1 ) |
2669 | 0 | { |
2670 | 0 | calculated_base64_stream_size += 2; |
2671 | 0 | } |
2672 | 0 | else if( remaining_size == 2 ) |
2673 | 0 | { |
2674 | 0 | calculated_base64_stream_size += 3; |
2675 | 0 | } |
2676 | 0 | } |
2677 | 0 | if( character_limit != 0 ) |
2678 | 0 | { |
2679 | 0 | if( calculated_base64_stream_size > character_limit ) |
2680 | 0 | { |
2681 | 0 | whitespace_size = calculated_base64_stream_size / character_limit; |
2682 | |
|
2683 | 0 | if( ( calculated_base64_stream_size % character_limit ) != 0 ) |
2684 | 0 | { |
2685 | 0 | whitespace_size += 1; |
2686 | 0 | } |
2687 | 0 | calculated_base64_stream_size += whitespace_size; |
2688 | 0 | } |
2689 | 0 | calculated_base64_stream_size += 1; |
2690 | 0 | } |
2691 | 0 | calculated_base64_stream_size *= base64_character_size; |
2692 | |
|
2693 | 0 | if( base64_stream_size < calculated_base64_stream_size ) |
2694 | 0 | { |
2695 | 0 | libcerror_error_set( |
2696 | 0 | error, |
2697 | 0 | LIBCERROR_ERROR_DOMAIN_ARGUMENTS, |
2698 | 0 | LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL, |
2699 | 0 | "%s: base64 stream is too small.", |
2700 | 0 | function ); |
2701 | |
|
2702 | 0 | return( -1 ); |
2703 | 0 | } |
2704 | 0 | while( byte_stream_index < byte_stream_size ) |
2705 | 0 | { |
2706 | | /* Convert the byte stream into a base64 triplet |
2707 | | */ |
2708 | 0 | if( libuna_base64_triplet_copy_from_byte_stream( |
2709 | 0 | &base64_triplet, |
2710 | 0 | byte_stream, |
2711 | 0 | byte_stream_size, |
2712 | 0 | &byte_stream_index, |
2713 | 0 | &padding_size, |
2714 | 0 | error ) != 1 ) |
2715 | 0 | { |
2716 | 0 | libcerror_error_set( |
2717 | 0 | error, |
2718 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
2719 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
2720 | 0 | "%s: unable to copy base64 triplet from byte stream.", |
2721 | 0 | function ); |
2722 | |
|
2723 | 0 | return( -1 ); |
2724 | 0 | } |
2725 | | /* Convert the base64 triplet into a base64 stream |
2726 | | */ |
2727 | 0 | if( libuna_base64_triplet_copy_to_base64_stream( |
2728 | 0 | base64_triplet, |
2729 | 0 | base64_stream, |
2730 | 0 | base64_stream_size, |
2731 | 0 | &safe_base64_stream_index, |
2732 | 0 | padding_size, |
2733 | 0 | base64_variant, |
2734 | 0 | error ) != 1 ) |
2735 | 0 | { |
2736 | 0 | libcerror_error_set( |
2737 | 0 | error, |
2738 | 0 | LIBCERROR_ERROR_DOMAIN_CONVERSION, |
2739 | 0 | LIBCERROR_CONVERSION_ERROR_INPUT_FAILED, |
2740 | 0 | "%s: unable to copy base64 triplet to base64 stream.", |
2741 | 0 | function ); |
2742 | |
|
2743 | 0 | return( -1 ); |
2744 | 0 | } |
2745 | 0 | if( character_limit != 0 ) |
2746 | 0 | { |
2747 | 0 | number_of_characters += 4; |
2748 | |
|
2749 | 0 | if( number_of_characters >= (size_t) character_limit ) |
2750 | 0 | { |
2751 | 0 | base64_character = (uint32_t) '\n'; |
2752 | |
|
2753 | 0 | switch( base64_variant & 0xf0000000UL ) |
2754 | 0 | { |
2755 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
2756 | 0 | base64_stream[ safe_base64_stream_index ] = (uint8_t) base64_character; |
2757 | 0 | break; |
2758 | | |
2759 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
2760 | 0 | byte_stream_copy_from_uint16_big_endian( |
2761 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
2762 | 0 | base64_character ); |
2763 | 0 | break; |
2764 | | |
2765 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
2766 | 0 | byte_stream_copy_from_uint16_little_endian( |
2767 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
2768 | 0 | base64_character ); |
2769 | 0 | break; |
2770 | | |
2771 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
2772 | 0 | byte_stream_copy_from_uint32_big_endian( |
2773 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
2774 | 0 | base64_character ); |
2775 | 0 | break; |
2776 | | |
2777 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
2778 | 0 | byte_stream_copy_from_uint32_little_endian( |
2779 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
2780 | 0 | base64_character ); |
2781 | 0 | break; |
2782 | 0 | } |
2783 | 0 | safe_base64_stream_index += base64_character_size; |
2784 | |
|
2785 | 0 | number_of_characters = 0; |
2786 | 0 | } |
2787 | 0 | } |
2788 | 0 | } |
2789 | 0 | if( character_limit != 0 ) |
2790 | 0 | { |
2791 | 0 | if( number_of_characters != 0 ) |
2792 | 0 | { |
2793 | 0 | base64_character = (uint32_t) '\n'; |
2794 | |
|
2795 | 0 | switch( base64_variant & 0xf0000000UL ) |
2796 | 0 | { |
2797 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_BYTE_STREAM: |
2798 | 0 | base64_stream[ safe_base64_stream_index ] = (uint8_t) base64_character; |
2799 | 0 | break; |
2800 | | |
2801 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_BIG_ENDIAN: |
2802 | 0 | byte_stream_copy_from_uint16_big_endian( |
2803 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
2804 | 0 | base64_character ); |
2805 | 0 | break; |
2806 | | |
2807 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF16_LITTLE_ENDIAN: |
2808 | 0 | byte_stream_copy_from_uint16_little_endian( |
2809 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
2810 | 0 | base64_character ); |
2811 | 0 | break; |
2812 | | |
2813 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_BIG_ENDIAN: |
2814 | 0 | byte_stream_copy_from_uint32_big_endian( |
2815 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
2816 | 0 | base64_character ); |
2817 | 0 | break; |
2818 | | |
2819 | 0 | case LIBUNA_BASE64_VARIANT_ENCODING_UTF32_LITTLE_ENDIAN: |
2820 | 0 | byte_stream_copy_from_uint32_little_endian( |
2821 | 0 | &( base64_stream[ safe_base64_stream_index ] ), |
2822 | 0 | base64_character ); |
2823 | 0 | break; |
2824 | 0 | } |
2825 | 0 | safe_base64_stream_index += base64_character_size; |
2826 | 0 | } |
2827 | 0 | } |
2828 | 0 | *base64_stream_index = safe_base64_stream_index; |
2829 | |
|
2830 | 0 | return( 1 ); |
2831 | 0 | } |
2832 | | |