Line data Source code
1 : /*
2 : ** Routines to represent binary data in ASCII and vice-versa
3 : **
4 : ** This module currently supports the following encodings:
5 : ** uuencode:
6 : ** each line encodes 45 bytes (except possibly the last)
7 : ** First char encodes (binary) length, rest data
8 : ** each char encodes 6 bits, as follows:
9 : ** binary: 01234567 abcdefgh ijklmnop
10 : ** ascii: 012345 67abcd efghij klmnop
11 : ** ASCII encoding method is "excess-space": 000000 is encoded as ' ', etc.
12 : ** short binary data is zero-extended (so the bits are always in the
13 : ** right place), this does *not* reflect in the length.
14 : ** base64:
15 : ** Line breaks are insignificant, but lines are at most 76 chars
16 : ** each char encodes 6 bits, in similar order as uucode/hqx. Encoding
17 : ** is done via a table.
18 : ** Short binary data is filled (in ASCII) with '='.
19 : ** hqx:
20 : ** File starts with introductory text, real data starts and ends
21 : ** with colons.
22 : ** Data consists of three similar parts: info, datafork, resourcefork.
23 : ** Each part is protected (at the end) with a 16-bit crc
24 : ** The binary data is run-length encoded, and then ascii-fied:
25 : ** binary: 01234567 abcdefgh ijklmnop
26 : ** ascii: 012345 67abcd efghij klmnop
27 : ** ASCII encoding is table-driven, see the code.
28 : ** Short binary data results in the runt ascii-byte being output with
29 : ** the bits in the right place.
30 : **
31 : ** While I was reading dozens of programs that encode or decode the formats
32 : ** here (documentation? hihi:-) I have formulated Jansen's Observation:
33 : **
34 : ** Programs that encode binary data in ASCII are written in
35 : ** such a style that they are as unreadable as possible. Devices used
36 : ** include unnecessary global variables, burying important tables
37 : ** in unrelated sourcefiles, putting functions in include files,
38 : ** using seemingly-descriptive variable names for different purposes,
39 : ** calls to empty subroutines and a host of others.
40 : **
41 : ** I have attempted to break with this tradition, but I guess that that
42 : ** does make the performance sub-optimal. Oh well, too bad...
43 : **
44 : ** Jack Jansen, CWI, July 1995.
45 : **
46 : ** Added support for quoted-printable encoding, based on rfc 1521 et al
47 : ** quoted-printable encoding specifies that non printable characters (anything
48 : ** below 32 and above 126) be encoded as =XX where XX is the hexadecimal value
49 : ** of the character. It also specifies some other behavior to enable 8bit data
50 : ** in a mail message with little difficulty (maximum line sizes, protecting
51 : ** some cases of whitespace, etc).
52 : **
53 : ** Brandon Long, September 2001.
54 : */
55 :
56 : #define PY_SSIZE_T_CLEAN
57 :
58 : #include "Python.h"
59 : #ifdef USE_ZLIB_CRC32
60 : #include "zlib.h"
61 : #endif
62 :
63 : static PyObject *Error;
64 : static PyObject *Incomplete;
65 :
66 : /*
67 : ** hqx lookup table, ascii->binary.
68 : */
69 :
70 : #define RUNCHAR 0x90
71 :
72 : #define DONE 0x7F
73 : #define SKIP 0x7E
74 : #define FAIL 0x7D
75 :
76 : static unsigned char table_a2b_hqx[256] = {
77 : /* ^@ ^A ^B ^C ^D ^E ^F ^G */
78 : /* 0*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
79 : /* \b \t \n ^K ^L \r ^N ^O */
80 : /* 1*/ FAIL, FAIL, SKIP, FAIL, FAIL, SKIP, FAIL, FAIL,
81 : /* ^P ^Q ^R ^S ^T ^U ^V ^W */
82 : /* 2*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
83 : /* ^X ^Y ^Z ^[ ^\ ^] ^^ ^_ */
84 : /* 3*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
85 : /* ! " # $ % & ' */
86 : /* 4*/ FAIL, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
87 : /* ( ) * + , - . / */
88 : /* 5*/ 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, FAIL, FAIL,
89 : /* 0 1 2 3 4 5 6 7 */
90 : /* 6*/ 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, FAIL,
91 : /* 8 9 : ; < = > ? */
92 : /* 7*/ 0x14, 0x15, DONE, FAIL, FAIL, FAIL, FAIL, FAIL,
93 : /* @ A B C D E F G */
94 : /* 8*/ 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D,
95 : /* H I J K L M N O */
96 : /* 9*/ 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, FAIL,
97 : /* P Q R S T U V W */
98 : /*10*/ 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, FAIL,
99 : /* X Y Z [ \ ] ^ _ */
100 : /*11*/ 0x2C, 0x2D, 0x2E, 0x2F, FAIL, FAIL, FAIL, FAIL,
101 : /* ` a b c d e f g */
102 : /*12*/ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, FAIL,
103 : /* h i j k l m n o */
104 : /*13*/ 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, FAIL, FAIL,
105 : /* p q r s t u v w */
106 : /*14*/ 0x3D, 0x3E, 0x3F, FAIL, FAIL, FAIL, FAIL, FAIL,
107 : /* x y z { | } ~ ^? */
108 : /*15*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
109 : /*16*/ FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
110 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
111 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
112 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
113 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
114 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
115 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
116 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
117 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
118 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
119 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
120 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
121 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
122 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
123 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
124 : FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL, FAIL,
125 : };
126 :
127 : static unsigned char table_b2a_hqx[] =
128 : "!\"#$%&'()*+,-012345689@ABCDEFGHIJKLMNPQRSTUVXYZ[`abcdefhijklmpqr";
129 :
130 : static char table_a2b_base64[] = {
131 : -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
132 : -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
133 : -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
134 : 52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1, /* Note PAD->0 */
135 : -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
136 : 15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
137 : -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
138 : 41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
139 : };
140 :
141 : #define BASE64_PAD '='
142 :
143 : /* Max binary chunk size; limited only by available memory */
144 : #define BASE64_MAXBIN ((PY_SSIZE_T_MAX - 3) / 2)
145 :
146 : static unsigned char table_b2a_base64[] =
147 : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
148 :
149 :
150 :
151 : static unsigned short crctab_hqx[256] = {
152 : 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
153 : 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
154 : 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
155 : 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
156 : 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
157 : 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
158 : 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
159 : 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
160 : 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
161 : 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
162 : 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
163 : 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
164 : 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
165 : 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
166 : 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
167 : 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
168 : 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
169 : 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
170 : 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
171 : 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
172 : 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
173 : 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
174 : 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
175 : 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
176 : 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
177 : 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
178 : 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
179 : 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
180 : 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
181 : 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
182 : 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
183 : 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0,
184 : };
185 :
186 : static int
187 0 : ascii_buffer_converter(PyObject *arg, Py_buffer *buf)
188 : {
189 0 : if (arg == NULL) {
190 0 : PyBuffer_Release(buf);
191 0 : return 1;
192 : }
193 0 : if (PyUnicode_Check(arg)) {
194 0 : if (PyUnicode_READY(arg) < 0)
195 0 : return 0;
196 0 : if (!PyUnicode_IS_ASCII(arg)) {
197 0 : PyErr_SetString(PyExc_ValueError,
198 : "string argument should contain only ASCII characters");
199 0 : return 0;
200 : }
201 : assert(PyUnicode_KIND(arg) == PyUnicode_1BYTE_KIND);
202 0 : buf->buf = (void *) PyUnicode_1BYTE_DATA(arg);
203 0 : buf->len = PyUnicode_GET_LENGTH(arg);
204 0 : buf->obj = NULL;
205 0 : return 1;
206 : }
207 0 : if (PyObject_GetBuffer(arg, buf, PyBUF_SIMPLE) != 0) {
208 0 : PyErr_Format(PyExc_TypeError,
209 : "argument should be bytes, buffer or ASCII string, "
210 : "not %R", Py_TYPE(arg));
211 0 : return 0;
212 : }
213 0 : if (!PyBuffer_IsContiguous(buf, 'C')) {
214 0 : PyErr_Format(PyExc_TypeError,
215 : "argument should be a contiguous buffer, "
216 : "not %R", Py_TYPE(arg));
217 0 : PyBuffer_Release(buf);
218 0 : return 0;
219 : }
220 0 : return Py_CLEANUP_SUPPORTED;
221 : }
222 :
223 :
224 : PyDoc_STRVAR(doc_a2b_uu, "(ascii) -> bin. Decode a line of uuencoded data");
225 :
226 : static PyObject *
227 0 : binascii_a2b_uu(PyObject *self, PyObject *args)
228 : {
229 : Py_buffer pascii;
230 : unsigned char *ascii_data, *bin_data;
231 0 : int leftbits = 0;
232 : unsigned char this_ch;
233 0 : unsigned int leftchar = 0;
234 : PyObject *rv;
235 : Py_ssize_t ascii_len, bin_len;
236 :
237 0 : if ( !PyArg_ParseTuple(args, "O&:a2b_uu", ascii_buffer_converter, &pascii) )
238 0 : return NULL;
239 0 : ascii_data = pascii.buf;
240 0 : ascii_len = pascii.len;
241 :
242 : assert(ascii_len >= 0);
243 :
244 : /* First byte: binary data length (in bytes) */
245 0 : bin_len = (*ascii_data++ - ' ') & 077;
246 0 : ascii_len--;
247 :
248 : /* Allocate the buffer */
249 0 : if ( (rv=PyBytes_FromStringAndSize(NULL, bin_len)) == NULL ) {
250 0 : PyBuffer_Release(&pascii);
251 0 : return NULL;
252 : }
253 0 : bin_data = (unsigned char *)PyBytes_AS_STRING(rv);
254 :
255 0 : for( ; bin_len > 0 ; ascii_len--, ascii_data++ ) {
256 : /* XXX is it really best to add NULs if there's no more data */
257 0 : this_ch = (ascii_len > 0) ? *ascii_data : 0;
258 0 : if ( this_ch == '\n' || this_ch == '\r' || ascii_len <= 0) {
259 : /*
260 : ** Whitespace. Assume some spaces got eaten at
261 : ** end-of-line. (We check this later)
262 : */
263 0 : this_ch = 0;
264 : } else {
265 : /* Check the character for legality
266 : ** The 64 in stead of the expected 63 is because
267 : ** there are a few uuencodes out there that use
268 : ** '`' as zero instead of space.
269 : */
270 0 : if ( this_ch < ' ' || this_ch > (' ' + 64)) {
271 0 : PyErr_SetString(Error, "Illegal char");
272 0 : PyBuffer_Release(&pascii);
273 0 : Py_DECREF(rv);
274 0 : return NULL;
275 : }
276 0 : this_ch = (this_ch - ' ') & 077;
277 : }
278 : /*
279 : ** Shift it in on the low end, and see if there's
280 : ** a byte ready for output.
281 : */
282 0 : leftchar = (leftchar << 6) | (this_ch);
283 0 : leftbits += 6;
284 0 : if ( leftbits >= 8 ) {
285 0 : leftbits -= 8;
286 0 : *bin_data++ = (leftchar >> leftbits) & 0xff;
287 0 : leftchar &= ((1 << leftbits) - 1);
288 0 : bin_len--;
289 : }
290 : }
291 : /*
292 : ** Finally, check that if there's anything left on the line
293 : ** that it's whitespace only.
294 : */
295 0 : while( ascii_len-- > 0 ) {
296 0 : this_ch = *ascii_data++;
297 : /* Extra '`' may be written as padding in some cases */
298 0 : if ( this_ch != ' ' && this_ch != ' '+64 &&
299 0 : this_ch != '\n' && this_ch != '\r' ) {
300 0 : PyErr_SetString(Error, "Trailing garbage");
301 0 : PyBuffer_Release(&pascii);
302 0 : Py_DECREF(rv);
303 0 : return NULL;
304 : }
305 : }
306 0 : PyBuffer_Release(&pascii);
307 0 : return rv;
308 : }
309 :
310 : PyDoc_STRVAR(doc_b2a_uu, "(bin) -> ascii. Uuencode line of data");
311 :
312 : static PyObject *
313 0 : binascii_b2a_uu(PyObject *self, PyObject *args)
314 : {
315 : Py_buffer pbin;
316 : unsigned char *ascii_data, *bin_data;
317 0 : int leftbits = 0;
318 : unsigned char this_ch;
319 0 : unsigned int leftchar = 0;
320 : PyObject *rv;
321 : Py_ssize_t bin_len;
322 :
323 0 : if ( !PyArg_ParseTuple(args, "y*:b2a_uu", &pbin) )
324 0 : return NULL;
325 0 : bin_data = pbin.buf;
326 0 : bin_len = pbin.len;
327 0 : if ( bin_len > 45 ) {
328 : /* The 45 is a limit that appears in all uuencode's */
329 0 : PyErr_SetString(Error, "At most 45 bytes at once");
330 0 : PyBuffer_Release(&pbin);
331 0 : return NULL;
332 : }
333 :
334 : /* We're lazy and allocate to much (fixed up later) */
335 0 : if ( (rv=PyBytes_FromStringAndSize(NULL, 2 + (bin_len+2)/3*4)) == NULL ) {
336 0 : PyBuffer_Release(&pbin);
337 0 : return NULL;
338 : }
339 0 : ascii_data = (unsigned char *)PyBytes_AS_STRING(rv);
340 :
341 : /* Store the length */
342 0 : *ascii_data++ = ' ' + (bin_len & 077);
343 :
344 0 : for( ; bin_len > 0 || leftbits != 0 ; bin_len--, bin_data++ ) {
345 : /* Shift the data (or padding) into our buffer */
346 0 : if ( bin_len > 0 ) /* Data */
347 0 : leftchar = (leftchar << 8) | *bin_data;
348 : else /* Padding */
349 0 : leftchar <<= 8;
350 0 : leftbits += 8;
351 :
352 : /* See if there are 6-bit groups ready */
353 0 : while ( leftbits >= 6 ) {
354 0 : this_ch = (leftchar >> (leftbits-6)) & 0x3f;
355 0 : leftbits -= 6;
356 0 : *ascii_data++ = this_ch + ' ';
357 : }
358 : }
359 0 : *ascii_data++ = '\n'; /* Append a courtesy newline */
360 :
361 0 : if (_PyBytes_Resize(&rv,
362 : (ascii_data -
363 0 : (unsigned char *)PyBytes_AS_STRING(rv))) < 0) {
364 0 : Py_DECREF(rv);
365 0 : rv = NULL;
366 : }
367 0 : PyBuffer_Release(&pbin);
368 0 : return rv;
369 : }
370 :
371 :
372 : static int
373 0 : binascii_find_valid(unsigned char *s, Py_ssize_t slen, int num)
374 : {
375 : /* Finds & returns the (num+1)th
376 : ** valid character for base64, or -1 if none.
377 : */
378 :
379 0 : int ret = -1;
380 : unsigned char c, b64val;
381 :
382 0 : while ((slen > 0) && (ret == -1)) {
383 0 : c = *s;
384 0 : b64val = table_a2b_base64[c & 0x7f];
385 0 : if ( ((c <= 0x7f) && (b64val != (unsigned char)-1)) ) {
386 0 : if (num == 0)
387 0 : ret = *s;
388 0 : num--;
389 : }
390 :
391 0 : s++;
392 0 : slen--;
393 : }
394 0 : return ret;
395 : }
396 :
397 : PyDoc_STRVAR(doc_a2b_base64, "(ascii) -> bin. Decode a line of base64 data");
398 :
399 : static PyObject *
400 0 : binascii_a2b_base64(PyObject *self, PyObject *args)
401 : {
402 : Py_buffer pascii;
403 : unsigned char *ascii_data, *bin_data;
404 0 : int leftbits = 0;
405 : unsigned char this_ch;
406 0 : unsigned int leftchar = 0;
407 : PyObject *rv;
408 : Py_ssize_t ascii_len, bin_len;
409 0 : int quad_pos = 0;
410 :
411 0 : if ( !PyArg_ParseTuple(args, "O&:a2b_base64", ascii_buffer_converter, &pascii) )
412 0 : return NULL;
413 0 : ascii_data = pascii.buf;
414 0 : ascii_len = pascii.len;
415 :
416 : assert(ascii_len >= 0);
417 :
418 0 : if (ascii_len > PY_SSIZE_T_MAX - 3) {
419 0 : PyBuffer_Release(&pascii);
420 0 : return PyErr_NoMemory();
421 : }
422 :
423 0 : bin_len = ((ascii_len+3)/4)*3; /* Upper bound, corrected later */
424 :
425 : /* Allocate the buffer */
426 0 : if ( (rv=PyBytes_FromStringAndSize(NULL, bin_len)) == NULL ) {
427 0 : PyBuffer_Release(&pascii);
428 0 : return NULL;
429 : }
430 0 : bin_data = (unsigned char *)PyBytes_AS_STRING(rv);
431 0 : bin_len = 0;
432 :
433 0 : for( ; ascii_len > 0; ascii_len--, ascii_data++) {
434 0 : this_ch = *ascii_data;
435 :
436 0 : if (this_ch > 0x7f ||
437 0 : this_ch == '\r' || this_ch == '\n' || this_ch == ' ')
438 0 : continue;
439 :
440 : /* Check for pad sequences and ignore
441 : ** the invalid ones.
442 : */
443 0 : if (this_ch == BASE64_PAD) {
444 0 : if ( (quad_pos < 2) ||
445 0 : ((quad_pos == 2) &&
446 0 : (binascii_find_valid(ascii_data, ascii_len, 1)
447 : != BASE64_PAD)) )
448 : {
449 0 : continue;
450 : }
451 : else {
452 : /* A pad sequence means no more input.
453 : ** We've already interpreted the data
454 : ** from the quad at this point.
455 : */
456 0 : leftbits = 0;
457 0 : break;
458 : }
459 : }
460 :
461 0 : this_ch = table_a2b_base64[*ascii_data];
462 0 : if ( this_ch == (unsigned char) -1 )
463 0 : continue;
464 :
465 : /*
466 : ** Shift it in on the low end, and see if there's
467 : ** a byte ready for output.
468 : */
469 0 : quad_pos = (quad_pos + 1) & 0x03;
470 0 : leftchar = (leftchar << 6) | (this_ch);
471 0 : leftbits += 6;
472 :
473 0 : if ( leftbits >= 8 ) {
474 0 : leftbits -= 8;
475 0 : *bin_data++ = (leftchar >> leftbits) & 0xff;
476 0 : bin_len++;
477 0 : leftchar &= ((1 << leftbits) - 1);
478 : }
479 : }
480 :
481 0 : if (leftbits != 0) {
482 0 : PyBuffer_Release(&pascii);
483 0 : PyErr_SetString(Error, "Incorrect padding");
484 0 : Py_DECREF(rv);
485 0 : return NULL;
486 : }
487 :
488 : /* And set string size correctly. If the result string is empty
489 : ** (because the input was all invalid) return the shared empty
490 : ** string instead; _PyBytes_Resize() won't do this for us.
491 : */
492 0 : if (bin_len > 0) {
493 0 : if (_PyBytes_Resize(&rv, bin_len) < 0) {
494 0 : Py_DECREF(rv);
495 0 : rv = NULL;
496 : }
497 : }
498 : else {
499 0 : Py_DECREF(rv);
500 0 : rv = PyBytes_FromStringAndSize("", 0);
501 : }
502 0 : PyBuffer_Release(&pascii);
503 0 : return rv;
504 : }
505 :
506 : PyDoc_STRVAR(doc_b2a_base64, "(bin) -> ascii. Base64-code line of data");
507 :
508 : static PyObject *
509 0 : binascii_b2a_base64(PyObject *self, PyObject *args)
510 : {
511 : Py_buffer pbuf;
512 : unsigned char *ascii_data, *bin_data;
513 0 : int leftbits = 0;
514 : unsigned char this_ch;
515 0 : unsigned int leftchar = 0;
516 : PyObject *rv;
517 : Py_ssize_t bin_len;
518 :
519 0 : if ( !PyArg_ParseTuple(args, "y*:b2a_base64", &pbuf) )
520 0 : return NULL;
521 0 : bin_data = pbuf.buf;
522 0 : bin_len = pbuf.len;
523 :
524 : assert(bin_len >= 0);
525 :
526 0 : if ( bin_len > BASE64_MAXBIN ) {
527 0 : PyErr_SetString(Error, "Too much data for base64 line");
528 0 : PyBuffer_Release(&pbuf);
529 0 : return NULL;
530 : }
531 :
532 : /* We're lazy and allocate too much (fixed up later).
533 : "+3" leaves room for up to two pad characters and a trailing
534 : newline. Note that 'b' gets encoded as 'Yg==\n' (1 in, 5 out). */
535 0 : if ( (rv=PyBytes_FromStringAndSize(NULL, bin_len*2 + 3)) == NULL ) {
536 0 : PyBuffer_Release(&pbuf);
537 0 : return NULL;
538 : }
539 0 : ascii_data = (unsigned char *)PyBytes_AS_STRING(rv);
540 :
541 0 : for( ; bin_len > 0 ; bin_len--, bin_data++ ) {
542 : /* Shift the data into our buffer */
543 0 : leftchar = (leftchar << 8) | *bin_data;
544 0 : leftbits += 8;
545 :
546 : /* See if there are 6-bit groups ready */
547 0 : while ( leftbits >= 6 ) {
548 0 : this_ch = (leftchar >> (leftbits-6)) & 0x3f;
549 0 : leftbits -= 6;
550 0 : *ascii_data++ = table_b2a_base64[this_ch];
551 : }
552 : }
553 0 : if ( leftbits == 2 ) {
554 0 : *ascii_data++ = table_b2a_base64[(leftchar&3) << 4];
555 0 : *ascii_data++ = BASE64_PAD;
556 0 : *ascii_data++ = BASE64_PAD;
557 0 : } else if ( leftbits == 4 ) {
558 0 : *ascii_data++ = table_b2a_base64[(leftchar&0xf) << 2];
559 0 : *ascii_data++ = BASE64_PAD;
560 : }
561 0 : *ascii_data++ = '\n'; /* Append a courtesy newline */
562 :
563 0 : if (_PyBytes_Resize(&rv,
564 : (ascii_data -
565 0 : (unsigned char *)PyBytes_AS_STRING(rv))) < 0) {
566 0 : Py_DECREF(rv);
567 0 : rv = NULL;
568 : }
569 0 : PyBuffer_Release(&pbuf);
570 0 : return rv;
571 : }
572 :
573 : PyDoc_STRVAR(doc_a2b_hqx, "ascii -> bin, done. Decode .hqx coding");
574 :
575 : static PyObject *
576 0 : binascii_a2b_hqx(PyObject *self, PyObject *args)
577 : {
578 : Py_buffer pascii;
579 : unsigned char *ascii_data, *bin_data;
580 0 : int leftbits = 0;
581 : unsigned char this_ch;
582 0 : unsigned int leftchar = 0;
583 : PyObject *rv;
584 : Py_ssize_t len;
585 0 : int done = 0;
586 :
587 0 : if ( !PyArg_ParseTuple(args, "O&:a2b_hqx", ascii_buffer_converter, &pascii) )
588 0 : return NULL;
589 0 : ascii_data = pascii.buf;
590 0 : len = pascii.len;
591 :
592 : assert(len >= 0);
593 :
594 0 : if (len > PY_SSIZE_T_MAX - 2) {
595 0 : PyBuffer_Release(&pascii);
596 0 : return PyErr_NoMemory();
597 : }
598 :
599 : /* Allocate a string that is too big (fixed later)
600 : Add two to the initial length to prevent interning which
601 : would preclude subsequent resizing. */
602 0 : if ( (rv=PyBytes_FromStringAndSize(NULL, len+2)) == NULL ) {
603 0 : PyBuffer_Release(&pascii);
604 0 : return NULL;
605 : }
606 0 : bin_data = (unsigned char *)PyBytes_AS_STRING(rv);
607 :
608 0 : for( ; len > 0 ; len--, ascii_data++ ) {
609 : /* Get the byte and look it up */
610 0 : this_ch = table_a2b_hqx[*ascii_data];
611 0 : if ( this_ch == SKIP )
612 0 : continue;
613 0 : if ( this_ch == FAIL ) {
614 0 : PyErr_SetString(Error, "Illegal char");
615 0 : PyBuffer_Release(&pascii);
616 0 : Py_DECREF(rv);
617 0 : return NULL;
618 : }
619 0 : if ( this_ch == DONE ) {
620 : /* The terminating colon */
621 0 : done = 1;
622 0 : break;
623 : }
624 :
625 : /* Shift it into the buffer and see if any bytes are ready */
626 0 : leftchar = (leftchar << 6) | (this_ch);
627 0 : leftbits += 6;
628 0 : if ( leftbits >= 8 ) {
629 0 : leftbits -= 8;
630 0 : *bin_data++ = (leftchar >> leftbits) & 0xff;
631 0 : leftchar &= ((1 << leftbits) - 1);
632 : }
633 : }
634 :
635 0 : if ( leftbits && !done ) {
636 0 : PyErr_SetString(Incomplete,
637 : "String has incomplete number of bytes");
638 0 : PyBuffer_Release(&pascii);
639 0 : Py_DECREF(rv);
640 0 : return NULL;
641 : }
642 0 : if (_PyBytes_Resize(&rv,
643 : (bin_data -
644 0 : (unsigned char *)PyBytes_AS_STRING(rv))) < 0) {
645 0 : Py_DECREF(rv);
646 0 : rv = NULL;
647 : }
648 0 : if (rv) {
649 0 : PyObject *rrv = Py_BuildValue("Oi", rv, done);
650 0 : PyBuffer_Release(&pascii);
651 0 : Py_DECREF(rv);
652 0 : return rrv;
653 : }
654 :
655 0 : PyBuffer_Release(&pascii);
656 0 : return NULL;
657 : }
658 :
659 : PyDoc_STRVAR(doc_rlecode_hqx, "Binhex RLE-code binary data");
660 :
661 : static PyObject *
662 0 : binascii_rlecode_hqx(PyObject *self, PyObject *args)
663 : {
664 : Py_buffer pbuf;
665 : unsigned char *in_data, *out_data;
666 : PyObject *rv;
667 : unsigned char ch;
668 : Py_ssize_t in, inend, len;
669 :
670 0 : if ( !PyArg_ParseTuple(args, "y*:rlecode_hqx", &pbuf) )
671 0 : return NULL;
672 0 : in_data = pbuf.buf;
673 0 : len = pbuf.len;
674 :
675 : assert(len >= 0);
676 :
677 0 : if (len > PY_SSIZE_T_MAX / 2 - 2) {
678 0 : PyBuffer_Release(&pbuf);
679 0 : return PyErr_NoMemory();
680 : }
681 :
682 : /* Worst case: output is twice as big as input (fixed later) */
683 0 : if ( (rv=PyBytes_FromStringAndSize(NULL, len*2+2)) == NULL ) {
684 0 : PyBuffer_Release(&pbuf);
685 0 : return NULL;
686 : }
687 0 : out_data = (unsigned char *)PyBytes_AS_STRING(rv);
688 :
689 0 : for( in=0; in<len; in++) {
690 0 : ch = in_data[in];
691 0 : if ( ch == RUNCHAR ) {
692 : /* RUNCHAR. Escape it. */
693 0 : *out_data++ = RUNCHAR;
694 0 : *out_data++ = 0;
695 : } else {
696 : /* Check how many following are the same */
697 0 : for(inend=in+1;
698 0 : inend<len && in_data[inend] == ch &&
699 0 : inend < in+255;
700 0 : inend++) ;
701 0 : if ( inend - in > 3 ) {
702 : /* More than 3 in a row. Output RLE. */
703 0 : *out_data++ = ch;
704 0 : *out_data++ = RUNCHAR;
705 0 : *out_data++ = (unsigned char) (inend-in);
706 0 : in = inend-1;
707 : } else {
708 : /* Less than 3. Output the byte itself */
709 0 : *out_data++ = ch;
710 : }
711 : }
712 : }
713 0 : if (_PyBytes_Resize(&rv,
714 : (out_data -
715 0 : (unsigned char *)PyBytes_AS_STRING(rv))) < 0) {
716 0 : Py_DECREF(rv);
717 0 : rv = NULL;
718 : }
719 0 : PyBuffer_Release(&pbuf);
720 0 : return rv;
721 : }
722 :
723 : PyDoc_STRVAR(doc_b2a_hqx, "Encode .hqx data");
724 :
725 : static PyObject *
726 0 : binascii_b2a_hqx(PyObject *self, PyObject *args)
727 : {
728 : Py_buffer pbin;
729 : unsigned char *ascii_data, *bin_data;
730 0 : int leftbits = 0;
731 : unsigned char this_ch;
732 0 : unsigned int leftchar = 0;
733 : PyObject *rv;
734 : Py_ssize_t len;
735 :
736 0 : if ( !PyArg_ParseTuple(args, "y*:b2a_hqx", &pbin) )
737 0 : return NULL;
738 0 : bin_data = pbin.buf;
739 0 : len = pbin.len;
740 :
741 : assert(len >= 0);
742 :
743 0 : if (len > PY_SSIZE_T_MAX / 2 - 2) {
744 0 : PyBuffer_Release(&pbin);
745 0 : return PyErr_NoMemory();
746 : }
747 :
748 : /* Allocate a buffer that is at least large enough */
749 0 : if ( (rv=PyBytes_FromStringAndSize(NULL, len*2+2)) == NULL ) {
750 0 : PyBuffer_Release(&pbin);
751 0 : return NULL;
752 : }
753 0 : ascii_data = (unsigned char *)PyBytes_AS_STRING(rv);
754 :
755 0 : for( ; len > 0 ; len--, bin_data++ ) {
756 : /* Shift into our buffer, and output any 6bits ready */
757 0 : leftchar = (leftchar << 8) | *bin_data;
758 0 : leftbits += 8;
759 0 : while ( leftbits >= 6 ) {
760 0 : this_ch = (leftchar >> (leftbits-6)) & 0x3f;
761 0 : leftbits -= 6;
762 0 : *ascii_data++ = table_b2a_hqx[this_ch];
763 : }
764 : }
765 : /* Output a possible runt byte */
766 0 : if ( leftbits ) {
767 0 : leftchar <<= (6-leftbits);
768 0 : *ascii_data++ = table_b2a_hqx[leftchar & 0x3f];
769 : }
770 0 : if (_PyBytes_Resize(&rv,
771 : (ascii_data -
772 0 : (unsigned char *)PyBytes_AS_STRING(rv))) < 0) {
773 0 : Py_DECREF(rv);
774 0 : rv = NULL;
775 : }
776 0 : PyBuffer_Release(&pbin);
777 0 : return rv;
778 : }
779 :
780 : PyDoc_STRVAR(doc_rledecode_hqx, "Decode hexbin RLE-coded string");
781 :
782 : static PyObject *
783 0 : binascii_rledecode_hqx(PyObject *self, PyObject *args)
784 : {
785 : Py_buffer pin;
786 : unsigned char *in_data, *out_data;
787 : unsigned char in_byte, in_repeat;
788 : PyObject *rv;
789 : Py_ssize_t in_len, out_len, out_len_left;
790 :
791 0 : if ( !PyArg_ParseTuple(args, "y*:rledecode_hqx", &pin) )
792 0 : return NULL;
793 0 : in_data = pin.buf;
794 0 : in_len = pin.len;
795 :
796 : assert(in_len >= 0);
797 :
798 : /* Empty string is a special case */
799 0 : if ( in_len == 0 ) {
800 0 : PyBuffer_Release(&pin);
801 0 : return PyBytes_FromStringAndSize("", 0);
802 : }
803 0 : else if (in_len > PY_SSIZE_T_MAX / 2) {
804 0 : PyBuffer_Release(&pin);
805 0 : return PyErr_NoMemory();
806 : }
807 :
808 : /* Allocate a buffer of reasonable size. Resized when needed */
809 0 : out_len = in_len*2;
810 0 : if ( (rv=PyBytes_FromStringAndSize(NULL, out_len)) == NULL ) {
811 0 : PyBuffer_Release(&pin);
812 0 : return NULL;
813 : }
814 0 : out_len_left = out_len;
815 0 : out_data = (unsigned char *)PyBytes_AS_STRING(rv);
816 :
817 : /*
818 : ** We need two macros here to get/put bytes and handle
819 : ** end-of-buffer for input and output strings.
820 : */
821 : #define INBYTE(b) \
822 : do { \
823 : if ( --in_len < 0 ) { \
824 : PyErr_SetString(Incomplete, ""); \
825 : Py_DECREF(rv); \
826 : PyBuffer_Release(&pin); \
827 : return NULL; \
828 : } \
829 : b = *in_data++; \
830 : } while(0)
831 :
832 : #define OUTBYTE(b) \
833 : do { \
834 : if ( --out_len_left < 0 ) { \
835 : if ( out_len > PY_SSIZE_T_MAX / 2) return PyErr_NoMemory(); \
836 : if (_PyBytes_Resize(&rv, 2*out_len) < 0) \
837 : { Py_DECREF(rv); PyBuffer_Release(&pin); return NULL; } \
838 : out_data = (unsigned char *)PyBytes_AS_STRING(rv) \
839 : + out_len; \
840 : out_len_left = out_len-1; \
841 : out_len = out_len * 2; \
842 : } \
843 : *out_data++ = b; \
844 : } while(0)
845 :
846 : /*
847 : ** Handle first byte separately (since we have to get angry
848 : ** in case of an orphaned RLE code).
849 : */
850 0 : INBYTE(in_byte);
851 :
852 0 : if (in_byte == RUNCHAR) {
853 0 : INBYTE(in_repeat);
854 0 : if (in_repeat != 0) {
855 : /* Note Error, not Incomplete (which is at the end
856 : ** of the string only). This is a programmer error.
857 : */
858 0 : PyErr_SetString(Error, "Orphaned RLE code at start");
859 0 : PyBuffer_Release(&pin);
860 0 : Py_DECREF(rv);
861 0 : return NULL;
862 : }
863 0 : OUTBYTE(RUNCHAR);
864 : } else {
865 0 : OUTBYTE(in_byte);
866 : }
867 :
868 0 : while( in_len > 0 ) {
869 0 : INBYTE(in_byte);
870 :
871 0 : if (in_byte == RUNCHAR) {
872 0 : INBYTE(in_repeat);
873 0 : if ( in_repeat == 0 ) {
874 : /* Just an escaped RUNCHAR value */
875 0 : OUTBYTE(RUNCHAR);
876 : } else {
877 : /* Pick up value and output a sequence of it */
878 0 : in_byte = out_data[-1];
879 0 : while ( --in_repeat > 0 )
880 0 : OUTBYTE(in_byte);
881 : }
882 : } else {
883 : /* Normal byte */
884 0 : OUTBYTE(in_byte);
885 : }
886 : }
887 0 : if (_PyBytes_Resize(&rv,
888 : (out_data -
889 0 : (unsigned char *)PyBytes_AS_STRING(rv))) < 0) {
890 0 : Py_DECREF(rv);
891 0 : rv = NULL;
892 : }
893 0 : PyBuffer_Release(&pin);
894 0 : return rv;
895 : }
896 :
897 : PyDoc_STRVAR(doc_crc_hqx,
898 : "(data, oldcrc) -> newcrc. Compute hqx CRC incrementally");
899 :
900 : static PyObject *
901 0 : binascii_crc_hqx(PyObject *self, PyObject *args)
902 : {
903 : Py_buffer pin;
904 : unsigned char *bin_data;
905 : unsigned int crc;
906 : Py_ssize_t len;
907 :
908 0 : if ( !PyArg_ParseTuple(args, "y*i:crc_hqx", &pin, &crc) )
909 0 : return NULL;
910 0 : bin_data = pin.buf;
911 0 : len = pin.len;
912 :
913 0 : while(len-- > 0) {
914 0 : crc=((crc<<8)&0xff00)^crctab_hqx[((crc>>8)&0xff)^*bin_data++];
915 : }
916 :
917 0 : PyBuffer_Release(&pin);
918 0 : return Py_BuildValue("i", crc);
919 : }
920 :
921 : PyDoc_STRVAR(doc_crc32,
922 : "(data, oldcrc = 0) -> newcrc. Compute CRC-32 incrementally");
923 :
924 : #ifdef USE_ZLIB_CRC32
925 : /* This was taken from zlibmodule.c PyZlib_crc32 (but is PY_SSIZE_T_CLEAN) */
926 : static PyObject *
927 0 : binascii_crc32(PyObject *self, PyObject *args)
928 : {
929 0 : unsigned int crc32val = 0; /* crc32(0L, Z_NULL, 0) */
930 : Py_buffer pbuf;
931 : Byte *buf;
932 : Py_ssize_t len;
933 : int signed_val;
934 :
935 0 : if (!PyArg_ParseTuple(args, "y*|I:crc32", &pbuf, &crc32val))
936 0 : return NULL;
937 0 : buf = (Byte*)pbuf.buf;
938 0 : len = pbuf.len;
939 0 : signed_val = crc32(crc32val, buf, len);
940 0 : PyBuffer_Release(&pbuf);
941 0 : return PyLong_FromUnsignedLong(signed_val & 0xffffffffU);
942 : }
943 : #else /* USE_ZLIB_CRC32 */
944 : /* Crc - 32 BIT ANSI X3.66 CRC checksum files
945 : Also known as: ISO 3307
946 : **********************************************************************|
947 : * *|
948 : * Demonstration program to compute the 32-bit CRC used as the frame *|
949 : * check sequence in ADCCP (ANSI X3.66, also known as FIPS PUB 71 *|
950 : * and FED-STD-1003, the U.S. versions of CCITT's X.25 link-level *|
951 : * protocol). The 32-bit FCS was added via the Federal Register, *|
952 : * 1 June 1982, p.23798. I presume but don't know for certain that *|
953 : * this polynomial is or will be included in CCITT V.41, which *|
954 : * defines the 16-bit CRC (often called CRC-CCITT) polynomial. FIPS *|
955 : * PUB 78 says that the 32-bit FCS reduces otherwise undetected *|
956 : * errors by a factor of 10^-5 over 16-bit FCS. *|
957 : * *|
958 : **********************************************************************|
959 :
960 : Copyright (C) 1986 Gary S. Brown. You may use this program, or
961 : code or tables extracted from it, as desired without restriction.
962 :
963 : First, the polynomial itself and its table of feedback terms. The
964 : polynomial is
965 : X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
966 : Note that we take it "backwards" and put the highest-order term in
967 : the lowest-order bit. The X^32 term is "implied"; the LSB is the
968 : X^31 term, etc. The X^0 term (usually shown as "+1") results in
969 : the MSB being 1.
970 :
971 : Note that the usual hardware shift register implementation, which
972 : is what we're using (we're merely optimizing it by doing eight-bit
973 : chunks at a time) shifts bits into the lowest-order term. In our
974 : implementation, that means shifting towards the right. Why do we
975 : do it this way? Because the calculated CRC must be transmitted in
976 : order from highest-order term to lowest-order term. UARTs transmit
977 : characters in order from LSB to MSB. By storing the CRC this way,
978 : we hand it to the UART in the order low-byte to high-byte; the UART
979 : sends each low-bit to hight-bit; and the result is transmission bit
980 : by bit from highest- to lowest-order term without requiring any bit
981 : shuffling on our part. Reception works similarly.
982 :
983 : The feedback terms table consists of 256, 32-bit entries. Notes:
984 :
985 : 1. The table can be generated at runtime if desired; code to do so
986 : is shown later. It might not be obvious, but the feedback
987 : terms simply represent the results of eight shift/xor opera-
988 : tions for all combinations of data and CRC register values.
989 :
990 : 2. The CRC accumulation logic is the same for all CRC polynomials,
991 : be they sixteen or thirty-two bits wide. You simply choose the
992 : appropriate table. Alternatively, because the table can be
993 : generated at runtime, you can start by generating the table for
994 : the polynomial in question and use exactly the same "updcrc",
995 : if your application needn't simultaneously handle two CRC
996 : polynomials. (Note, however, that XMODEM is strange.)
997 :
998 : 3. For 16-bit CRCs, the table entries need be only 16 bits wide;
999 : of course, 32-bit entries work OK if the high 16 bits are zero.
1000 :
1001 : 4. The values must be right-shifted by eight bits by the "updcrc"
1002 : logic; the shift must be unsigned (bring in zeroes). On some
1003 : hardware you could probably optimize the shift in assembler by
1004 : using byte-swap instructions.
1005 : ********************************************************************/
1006 :
1007 : static unsigned int crc_32_tab[256] = {
1008 : 0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U,
1009 : 0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U,
1010 : 0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U,
1011 : 0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU,
1012 : 0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U,
1013 : 0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U,
1014 : 0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U,
1015 : 0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU,
1016 : 0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U,
1017 : 0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU,
1018 : 0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U,
1019 : 0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U,
1020 : 0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U,
1021 : 0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU,
1022 : 0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU,
1023 : 0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U,
1024 : 0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU,
1025 : 0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U,
1026 : 0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U,
1027 : 0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U,
1028 : 0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU,
1029 : 0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U,
1030 : 0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U,
1031 : 0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU,
1032 : 0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U,
1033 : 0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U,
1034 : 0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U,
1035 : 0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U,
1036 : 0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U,
1037 : 0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU,
1038 : 0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU,
1039 : 0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U,
1040 : 0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U,
1041 : 0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU,
1042 : 0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU,
1043 : 0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U,
1044 : 0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU,
1045 : 0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U,
1046 : 0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU,
1047 : 0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U,
1048 : 0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU,
1049 : 0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U,
1050 : 0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U,
1051 : 0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU,
1052 : 0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U,
1053 : 0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U,
1054 : 0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U,
1055 : 0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U,
1056 : 0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U,
1057 : 0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U,
1058 : 0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU,
1059 : 0x2d02ef8dU
1060 : };
1061 :
1062 : static PyObject *
1063 : binascii_crc32(PyObject *self, PyObject *args)
1064 : { /* By Jim Ahlstrom; All rights transferred to CNRI */
1065 : Py_buffer pbin;
1066 : unsigned char *bin_data;
1067 : unsigned int crc = 0; /* initial value of CRC */
1068 : Py_ssize_t len;
1069 : unsigned int result;
1070 :
1071 : if ( !PyArg_ParseTuple(args, "y*|I:crc32", &pbin, &crc) )
1072 : return NULL;
1073 : bin_data = pbin.buf;
1074 : len = pbin.len;
1075 :
1076 : crc = ~ crc;
1077 : while (len-- > 0) {
1078 : crc = crc_32_tab[(crc ^ *bin_data++) & 0xff] ^ (crc >> 8);
1079 : /* Note: (crc >> 8) MUST zero fill on left */
1080 : }
1081 :
1082 : result = (crc ^ 0xFFFFFFFF);
1083 : PyBuffer_Release(&pbin);
1084 : return PyLong_FromUnsignedLong(result & 0xffffffff);
1085 : }
1086 : #endif /* USE_ZLIB_CRC32 */
1087 :
1088 :
1089 : static PyObject *
1090 0 : binascii_hexlify(PyObject *self, PyObject *args)
1091 : {
1092 : Py_buffer parg;
1093 : char* argbuf;
1094 : Py_ssize_t arglen;
1095 : PyObject *retval;
1096 : char* retbuf;
1097 : Py_ssize_t i, j;
1098 :
1099 0 : if (!PyArg_ParseTuple(args, "y*:b2a_hex", &parg))
1100 0 : return NULL;
1101 0 : argbuf = parg.buf;
1102 0 : arglen = parg.len;
1103 :
1104 : assert(arglen >= 0);
1105 0 : if (arglen > PY_SSIZE_T_MAX / 2) {
1106 0 : PyBuffer_Release(&parg);
1107 0 : return PyErr_NoMemory();
1108 : }
1109 :
1110 0 : retval = PyBytes_FromStringAndSize(NULL, arglen*2);
1111 0 : if (!retval) {
1112 0 : PyBuffer_Release(&parg);
1113 0 : return NULL;
1114 : }
1115 0 : retbuf = PyBytes_AS_STRING(retval);
1116 :
1117 : /* make hex version of string, taken from shamodule.c */
1118 0 : for (i=j=0; i < arglen; i++) {
1119 : unsigned char c;
1120 0 : c = (argbuf[i] >> 4) & 0xf;
1121 0 : retbuf[j++] = Py_hexdigits[c];
1122 0 : c = argbuf[i] & 0xf;
1123 0 : retbuf[j++] = Py_hexdigits[c];
1124 : }
1125 0 : PyBuffer_Release(&parg);
1126 0 : return retval;
1127 : }
1128 :
1129 : PyDoc_STRVAR(doc_hexlify,
1130 : "b2a_hex(data) -> s; Hexadecimal representation of binary data.\n\
1131 : \n\
1132 : This function is also available as \"hexlify()\".");
1133 :
1134 :
1135 : static int
1136 0 : to_int(int c)
1137 : {
1138 0 : if (isdigit(c))
1139 0 : return c - '0';
1140 : else {
1141 0 : if (Py_ISUPPER(c))
1142 0 : c = Py_TOLOWER(c);
1143 0 : if (c >= 'a' && c <= 'f')
1144 0 : return c - 'a' + 10;
1145 : }
1146 0 : return -1;
1147 : }
1148 :
1149 :
1150 : static PyObject *
1151 0 : binascii_unhexlify(PyObject *self, PyObject *args)
1152 : {
1153 : Py_buffer parg;
1154 : char* argbuf;
1155 : Py_ssize_t arglen;
1156 : PyObject *retval;
1157 : char* retbuf;
1158 : Py_ssize_t i, j;
1159 :
1160 0 : if (!PyArg_ParseTuple(args, "O&:a2b_hex", ascii_buffer_converter, &parg))
1161 0 : return NULL;
1162 0 : argbuf = parg.buf;
1163 0 : arglen = parg.len;
1164 :
1165 : assert(arglen >= 0);
1166 :
1167 : /* XXX What should we do about strings with an odd length? Should
1168 : * we add an implicit leading zero, or a trailing zero? For now,
1169 : * raise an exception.
1170 : */
1171 0 : if (arglen % 2) {
1172 0 : PyBuffer_Release(&parg);
1173 0 : PyErr_SetString(Error, "Odd-length string");
1174 0 : return NULL;
1175 : }
1176 :
1177 0 : retval = PyBytes_FromStringAndSize(NULL, (arglen/2));
1178 0 : if (!retval) {
1179 0 : PyBuffer_Release(&parg);
1180 0 : return NULL;
1181 : }
1182 0 : retbuf = PyBytes_AS_STRING(retval);
1183 :
1184 0 : for (i=j=0; i < arglen; i += 2) {
1185 0 : int top = to_int(Py_CHARMASK(argbuf[i]));
1186 0 : int bot = to_int(Py_CHARMASK(argbuf[i+1]));
1187 0 : if (top == -1 || bot == -1) {
1188 0 : PyErr_SetString(Error,
1189 : "Non-hexadecimal digit found");
1190 0 : goto finally;
1191 : }
1192 0 : retbuf[j++] = (top << 4) + bot;
1193 : }
1194 0 : PyBuffer_Release(&parg);
1195 0 : return retval;
1196 :
1197 : finally:
1198 0 : PyBuffer_Release(&parg);
1199 0 : Py_DECREF(retval);
1200 0 : return NULL;
1201 : }
1202 :
1203 : PyDoc_STRVAR(doc_unhexlify,
1204 : "a2b_hex(hexstr) -> s; Binary data of hexadecimal representation.\n\
1205 : \n\
1206 : hexstr must contain an even number of hex digits (upper or lower case).\n\
1207 : This function is also available as \"unhexlify()\"");
1208 :
1209 : static int table_hex[128] = {
1210 : -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
1211 : -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
1212 : -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
1213 : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1, -1,-1,-1,-1,
1214 : -1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
1215 : -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
1216 : -1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
1217 : -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1
1218 : };
1219 :
1220 : #define hexval(c) table_hex[(unsigned int)(c)]
1221 :
1222 : #define MAXLINESIZE 76
1223 :
1224 : PyDoc_STRVAR(doc_a2b_qp, "Decode a string of qp-encoded data");
1225 :
1226 : static PyObject*
1227 0 : binascii_a2b_qp(PyObject *self, PyObject *args, PyObject *kwargs)
1228 : {
1229 : Py_ssize_t in, out;
1230 : char ch;
1231 : Py_buffer pdata;
1232 : unsigned char *data, *odata;
1233 0 : Py_ssize_t datalen = 0;
1234 : PyObject *rv;
1235 : static char *kwlist[] = {"data", "header", NULL};
1236 0 : int header = 0;
1237 :
1238 0 : if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O&|i:a2b_qp", kwlist,
1239 : ascii_buffer_converter, &pdata, &header))
1240 0 : return NULL;
1241 0 : data = pdata.buf;
1242 0 : datalen = pdata.len;
1243 :
1244 : /* We allocate the output same size as input, this is overkill.
1245 : * The previous implementation used calloc() so we'll zero out the
1246 : * memory here too, since PyMem_Malloc() does not guarantee that.
1247 : */
1248 0 : odata = (unsigned char *) PyMem_Malloc(datalen);
1249 0 : if (odata == NULL) {
1250 0 : PyBuffer_Release(&pdata);
1251 0 : PyErr_NoMemory();
1252 0 : return NULL;
1253 : }
1254 0 : memset(odata, 0, datalen);
1255 :
1256 0 : in = out = 0;
1257 0 : while (in < datalen) {
1258 0 : if (data[in] == '=') {
1259 0 : in++;
1260 0 : if (in >= datalen) break;
1261 : /* Soft line breaks */
1262 0 : if ((data[in] == '\n') || (data[in] == '\r')) {
1263 0 : if (data[in] != '\n') {
1264 0 : while (in < datalen && data[in] != '\n') in++;
1265 : }
1266 0 : if (in < datalen) in++;
1267 : }
1268 0 : else if (data[in] == '=') {
1269 : /* broken case from broken python qp */
1270 0 : odata[out++] = '=';
1271 0 : in++;
1272 : }
1273 0 : else if (((data[in] >= 'A' && data[in] <= 'F') ||
1274 0 : (data[in] >= 'a' && data[in] <= 'f') ||
1275 0 : (data[in] >= '0' && data[in] <= '9')) &&
1276 0 : ((data[in+1] >= 'A' && data[in+1] <= 'F') ||
1277 0 : (data[in+1] >= 'a' && data[in+1] <= 'f') ||
1278 0 : (data[in+1] >= '0' && data[in+1] <= '9'))) {
1279 : /* hexval */
1280 0 : ch = hexval(data[in]) << 4;
1281 0 : in++;
1282 0 : ch |= hexval(data[in]);
1283 0 : in++;
1284 0 : odata[out++] = ch;
1285 : }
1286 : else {
1287 0 : odata[out++] = '=';
1288 : }
1289 : }
1290 0 : else if (header && data[in] == '_') {
1291 0 : odata[out++] = ' ';
1292 0 : in++;
1293 : }
1294 : else {
1295 0 : odata[out] = data[in];
1296 0 : in++;
1297 0 : out++;
1298 : }
1299 : }
1300 0 : if ((rv = PyBytes_FromStringAndSize((char *)odata, out)) == NULL) {
1301 0 : PyBuffer_Release(&pdata);
1302 0 : PyMem_Free(odata);
1303 0 : return NULL;
1304 : }
1305 0 : PyBuffer_Release(&pdata);
1306 0 : PyMem_Free(odata);
1307 0 : return rv;
1308 : }
1309 :
1310 : static int
1311 0 : to_hex (unsigned char ch, unsigned char *s)
1312 : {
1313 0 : unsigned int uvalue = ch;
1314 :
1315 0 : s[1] = "0123456789ABCDEF"[uvalue % 16];
1316 0 : uvalue = (uvalue / 16);
1317 0 : s[0] = "0123456789ABCDEF"[uvalue % 16];
1318 0 : return 0;
1319 : }
1320 :
1321 : PyDoc_STRVAR(doc_b2a_qp,
1322 : "b2a_qp(data, quotetabs=0, istext=1, header=0) -> s; \n\
1323 : Encode a string using quoted-printable encoding. \n\
1324 : \n\
1325 : On encoding, when istext is set, newlines are not encoded, and white \n\
1326 : space at end of lines is. When istext is not set, \\r and \\n (CR/LF) are \n\
1327 : both encoded. When quotetabs is set, space and tabs are encoded.");
1328 :
1329 : /* XXX: This is ridiculously complicated to be backward compatible
1330 : * (mostly) with the quopri module. It doesn't re-create the quopri
1331 : * module bug where text ending in CRLF has the CR encoded */
1332 : static PyObject*
1333 0 : binascii_b2a_qp (PyObject *self, PyObject *args, PyObject *kwargs)
1334 : {
1335 : Py_ssize_t in, out;
1336 : Py_buffer pdata;
1337 : unsigned char *data, *odata;
1338 0 : Py_ssize_t datalen = 0, odatalen = 0;
1339 : PyObject *rv;
1340 0 : unsigned int linelen = 0;
1341 : static char *kwlist[] = {"data", "quotetabs", "istext",
1342 : "header", NULL};
1343 0 : int istext = 1;
1344 0 : int quotetabs = 0;
1345 0 : int header = 0;
1346 : unsigned char ch;
1347 0 : int crlf = 0;
1348 : unsigned char *p;
1349 :
1350 0 : if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y*|iii", kwlist, &pdata,
1351 : "etabs, &istext, &header))
1352 0 : return NULL;
1353 0 : data = pdata.buf;
1354 0 : datalen = pdata.len;
1355 :
1356 : /* See if this string is using CRLF line ends */
1357 : /* XXX: this function has the side effect of converting all of
1358 : * the end of lines to be the same depending on this detection
1359 : * here */
1360 0 : p = (unsigned char *) memchr(data, '\n', datalen);
1361 0 : if ((p != NULL) && (p > data) && (*(p-1) == '\r'))
1362 0 : crlf = 1;
1363 :
1364 : /* First, scan to see how many characters need to be encoded */
1365 0 : in = 0;
1366 0 : while (in < datalen) {
1367 0 : if ((data[in] > 126) ||
1368 0 : (data[in] == '=') ||
1369 0 : (header && data[in] == '_') ||
1370 0 : ((data[in] == '.') && (linelen == 0) &&
1371 0 : (data[in+1] == '\n' || data[in+1] == '\r' || data[in+1] == 0)) ||
1372 0 : (!istext && ((data[in] == '\r') || (data[in] == '\n'))) ||
1373 0 : ((data[in] == '\t' || data[in] == ' ') && (in + 1 == datalen)) ||
1374 0 : ((data[in] < 33) &&
1375 0 : (data[in] != '\r') && (data[in] != '\n') &&
1376 0 : (quotetabs || ((data[in] != '\t') && (data[in] != ' ')))))
1377 : {
1378 0 : if ((linelen + 3) >= MAXLINESIZE) {
1379 0 : linelen = 0;
1380 0 : if (crlf)
1381 0 : odatalen += 3;
1382 : else
1383 0 : odatalen += 2;
1384 : }
1385 0 : linelen += 3;
1386 0 : odatalen += 3;
1387 0 : in++;
1388 : }
1389 : else {
1390 0 : if (istext &&
1391 0 : ((data[in] == '\n') ||
1392 0 : ((in+1 < datalen) && (data[in] == '\r') &&
1393 0 : (data[in+1] == '\n'))))
1394 : {
1395 0 : linelen = 0;
1396 : /* Protect against whitespace on end of line */
1397 0 : if (in && ((data[in-1] == ' ') || (data[in-1] == '\t')))
1398 0 : odatalen += 2;
1399 0 : if (crlf)
1400 0 : odatalen += 2;
1401 : else
1402 0 : odatalen += 1;
1403 0 : if (data[in] == '\r')
1404 0 : in += 2;
1405 : else
1406 0 : in++;
1407 : }
1408 : else {
1409 0 : if ((in + 1 != datalen) &&
1410 0 : (data[in+1] != '\n') &&
1411 0 : (linelen + 1) >= MAXLINESIZE) {
1412 0 : linelen = 0;
1413 0 : if (crlf)
1414 0 : odatalen += 3;
1415 : else
1416 0 : odatalen += 2;
1417 : }
1418 0 : linelen++;
1419 0 : odatalen++;
1420 0 : in++;
1421 : }
1422 : }
1423 : }
1424 :
1425 : /* We allocate the output same size as input, this is overkill.
1426 : * The previous implementation used calloc() so we'll zero out the
1427 : * memory here too, since PyMem_Malloc() does not guarantee that.
1428 : */
1429 0 : odata = (unsigned char *) PyMem_Malloc(odatalen);
1430 0 : if (odata == NULL) {
1431 0 : PyBuffer_Release(&pdata);
1432 0 : PyErr_NoMemory();
1433 0 : return NULL;
1434 : }
1435 0 : memset(odata, 0, odatalen);
1436 :
1437 0 : in = out = linelen = 0;
1438 0 : while (in < datalen) {
1439 0 : if ((data[in] > 126) ||
1440 0 : (data[in] == '=') ||
1441 0 : (header && data[in] == '_') ||
1442 0 : ((data[in] == '.') && (linelen == 0) &&
1443 0 : (data[in+1] == '\n' || data[in+1] == '\r' || data[in+1] == 0)) ||
1444 0 : (!istext && ((data[in] == '\r') || (data[in] == '\n'))) ||
1445 0 : ((data[in] == '\t' || data[in] == ' ') && (in + 1 == datalen)) ||
1446 0 : ((data[in] < 33) &&
1447 0 : (data[in] != '\r') && (data[in] != '\n') &&
1448 0 : (quotetabs ||
1449 0 : (!quotetabs && ((data[in] != '\t') && (data[in] != ' '))))))
1450 : {
1451 0 : if ((linelen + 3 )>= MAXLINESIZE) {
1452 0 : odata[out++] = '=';
1453 0 : if (crlf) odata[out++] = '\r';
1454 0 : odata[out++] = '\n';
1455 0 : linelen = 0;
1456 : }
1457 0 : odata[out++] = '=';
1458 0 : to_hex(data[in], &odata[out]);
1459 0 : out += 2;
1460 0 : in++;
1461 0 : linelen += 3;
1462 : }
1463 : else {
1464 0 : if (istext &&
1465 0 : ((data[in] == '\n') ||
1466 0 : ((in+1 < datalen) && (data[in] == '\r') &&
1467 0 : (data[in+1] == '\n'))))
1468 : {
1469 0 : linelen = 0;
1470 : /* Protect against whitespace on end of line */
1471 0 : if (out && ((odata[out-1] == ' ') || (odata[out-1] == '\t'))) {
1472 0 : ch = odata[out-1];
1473 0 : odata[out-1] = '=';
1474 0 : to_hex(ch, &odata[out]);
1475 0 : out += 2;
1476 : }
1477 :
1478 0 : if (crlf) odata[out++] = '\r';
1479 0 : odata[out++] = '\n';
1480 0 : if (data[in] == '\r')
1481 0 : in += 2;
1482 : else
1483 0 : in++;
1484 : }
1485 : else {
1486 0 : if ((in + 1 != datalen) &&
1487 0 : (data[in+1] != '\n') &&
1488 0 : (linelen + 1) >= MAXLINESIZE) {
1489 0 : odata[out++] = '=';
1490 0 : if (crlf) odata[out++] = '\r';
1491 0 : odata[out++] = '\n';
1492 0 : linelen = 0;
1493 : }
1494 0 : linelen++;
1495 0 : if (header && data[in] == ' ') {
1496 0 : odata[out++] = '_';
1497 0 : in++;
1498 : }
1499 : else {
1500 0 : odata[out++] = data[in++];
1501 : }
1502 : }
1503 : }
1504 : }
1505 0 : if ((rv = PyBytes_FromStringAndSize((char *)odata, out)) == NULL) {
1506 0 : PyBuffer_Release(&pdata);
1507 0 : PyMem_Free(odata);
1508 0 : return NULL;
1509 : }
1510 0 : PyBuffer_Release(&pdata);
1511 0 : PyMem_Free(odata);
1512 0 : return rv;
1513 : }
1514 :
1515 : /* List of functions defined in the module */
1516 :
1517 : static struct PyMethodDef binascii_module_methods[] = {
1518 : {"a2b_uu", binascii_a2b_uu, METH_VARARGS, doc_a2b_uu},
1519 : {"b2a_uu", binascii_b2a_uu, METH_VARARGS, doc_b2a_uu},
1520 : {"a2b_base64", binascii_a2b_base64, METH_VARARGS, doc_a2b_base64},
1521 : {"b2a_base64", binascii_b2a_base64, METH_VARARGS, doc_b2a_base64},
1522 : {"a2b_hqx", binascii_a2b_hqx, METH_VARARGS, doc_a2b_hqx},
1523 : {"b2a_hqx", binascii_b2a_hqx, METH_VARARGS, doc_b2a_hqx},
1524 : {"b2a_hex", binascii_hexlify, METH_VARARGS, doc_hexlify},
1525 : {"a2b_hex", binascii_unhexlify, METH_VARARGS, doc_unhexlify},
1526 : {"hexlify", binascii_hexlify, METH_VARARGS, doc_hexlify},
1527 : {"unhexlify", binascii_unhexlify, METH_VARARGS, doc_unhexlify},
1528 : {"rlecode_hqx", binascii_rlecode_hqx, METH_VARARGS, doc_rlecode_hqx},
1529 : {"rledecode_hqx", binascii_rledecode_hqx, METH_VARARGS,
1530 : doc_rledecode_hqx},
1531 : {"crc_hqx", binascii_crc_hqx, METH_VARARGS, doc_crc_hqx},
1532 : {"crc32", binascii_crc32, METH_VARARGS, doc_crc32},
1533 : {"a2b_qp", (PyCFunction)binascii_a2b_qp, METH_VARARGS | METH_KEYWORDS,
1534 : doc_a2b_qp},
1535 : {"b2a_qp", (PyCFunction)binascii_b2a_qp, METH_VARARGS | METH_KEYWORDS,
1536 : doc_b2a_qp},
1537 : {NULL, NULL} /* sentinel */
1538 : };
1539 :
1540 :
1541 : /* Initialization function for the module (*must* be called PyInit_binascii) */
1542 : PyDoc_STRVAR(doc_binascii, "Conversion between binary data and ASCII");
1543 :
1544 :
1545 : static struct PyModuleDef binasciimodule = {
1546 : PyModuleDef_HEAD_INIT,
1547 : "binascii",
1548 : doc_binascii,
1549 : -1,
1550 : binascii_module_methods,
1551 : NULL,
1552 : NULL,
1553 : NULL,
1554 : NULL
1555 : };
1556 :
1557 : PyMODINIT_FUNC
1558 0 : PyInit_binascii(void)
1559 : {
1560 : PyObject *m, *d;
1561 :
1562 : /* Create the module and add the functions */
1563 0 : m = PyModule_Create(&binasciimodule);
1564 0 : if (m == NULL)
1565 0 : return NULL;
1566 :
1567 0 : d = PyModule_GetDict(m);
1568 :
1569 0 : Error = PyErr_NewException("binascii.Error", PyExc_ValueError, NULL);
1570 0 : PyDict_SetItemString(d, "Error", Error);
1571 0 : Incomplete = PyErr_NewException("binascii.Incomplete", NULL, NULL);
1572 0 : PyDict_SetItemString(d, "Incomplete", Incomplete);
1573 0 : if (PyErr_Occurred()) {
1574 0 : Py_DECREF(m);
1575 0 : m = NULL;
1576 : }
1577 0 : return m;
1578 : }
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