NeoMutt  2021-10-22-8-g9cb437
Teaching an old dog new tricks
DOXYGEN
handler.c File Reference

Decide how to display email content. More...

#include "config.h"
#include <stddef.h>
#include <ctype.h>
#include <iconv.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "mutt.h"
#include "handler.h"
#include "attach/lib.h"
#include "menu/lib.h"
#include "ncrypt/lib.h"
#include "pager/lib.h"
#include "copy.h"
#include "enriched.h"
#include "keymap.h"
#include "mailcap.h"
#include "mutt_globals.h"
#include "mutt_logging.h"
#include "muttlib.h"
#include "opcodes.h"
#include "options.h"
#include "rfc3676.h"
#include <libintl.h>
+ Include dependency graph for handler.c:

Go to the source code of this file.

Macros

#define BUFI_SIZE   1000
 
#define BUFO_SIZE   2000
 
#define TXT_HTML   1
 
#define TXT_PLAIN   2
 
#define TXT_ENRICHED   3
 

Typedefs

typedef int(* handler_t) (struct Body *b, struct State *s)
 

Functions

static void print_part_line (struct State *s, struct Body *b, int n)
 Print a separator for the Mime part. More...
 
static void convert_to_state (iconv_t cd, char *bufi, size_t *l, struct State *s)
 Convert text and write it to a file. More...
 
static void decode_xbit (struct State *s, long len, bool istext, iconv_t cd)
 Decode xbit-encoded text. More...
 
static int qp_decode_triple (char *s, char *d)
 Decode a quoted-printable triplet. More...
 
static void qp_decode_line (char *dest, char *src, size_t *l, int last)
 Decode a line of quoted-printable text. More...
 
static void decode_quoted (struct State *s, long len, bool istext, iconv_t cd)
 Decode an attachment encoded with quoted-printable. More...
 
static unsigned char decode_byte (char ch)
 Decode a uuencoded byte. More...
 
static void decode_uuencoded (struct State *s, long len, bool istext, iconv_t cd)
 Decode uuencoded text. More...
 
static bool is_mmnoask (const char *buf)
 Metamail compatibility: should the attachment be autoviewed? More...
 
static bool is_autoview (struct Body *b)
 Should email body be filtered by mailcap. More...
 
static int autoview_handler (struct Body *a, struct State *s)
 Handler for autoviewable attachments - Implements handler_t -. More...
 
static int text_plain_handler (struct Body *b, struct State *s)
 Handler for plain text - Implements handler_t -. More...
 
static int message_handler (struct Body *a, struct State *s)
 Handler for message/rfc822 body parts - Implements handler_t -. More...
 
static int external_body_handler (struct Body *b, struct State *s)
 Handler for external-body emails - Implements handler_t -. More...
 
static int alternative_handler (struct Body *a, struct State *s)
 Handler for multipart alternative emails - Implements handler_t -. More...
 
static int multilingual_handler (struct Body *a, struct State *s)
 Handler for multi-lingual emails - Implements handler_t -. More...
 
static int multipart_handler (struct Body *a, struct State *s)
 Handler for multipart emails - Implements handler_t -. More...
 
static int run_decode_and_handler (struct Body *b, struct State *s, handler_t handler, bool plaintext)
 Run an appropriate decoder for an email. More...
 
static int valid_pgp_encrypted_handler (struct Body *b, struct State *s)
 Handler for valid pgp-encrypted emails - Implements handler_t -. More...
 
static int malformed_pgp_encrypted_handler (struct Body *b, struct State *s)
 Handler for invalid pgp-encrypted emails - Implements handler_t -. More...
 
void mutt_decode_base64 (struct State *s, size_t len, bool istext, iconv_t cd)
 Decode base64-encoded text. More...
 
int mutt_body_handler (struct Body *b, struct State *s)
 Handler for the Body of an email. More...
 
bool mutt_can_decode (struct Body *a)
 Will decoding the attachment produce any output. More...
 
void mutt_decode_attachment (struct Body *b, struct State *s)
 Decode an email's attachment. More...
 

Detailed Description

Decide how to display email content.

Authors
  • Michael R. Elkins

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file handler.c.

Macro Definition Documentation

◆ BUFI_SIZE

#define BUFI_SIZE   1000

Definition at line 63 of file handler.c.

◆ BUFO_SIZE

#define BUFO_SIZE   2000

Definition at line 64 of file handler.c.

◆ TXT_HTML

#define TXT_HTML   1

Definition at line 66 of file handler.c.

◆ TXT_PLAIN

#define TXT_PLAIN   2

Definition at line 67 of file handler.c.

◆ TXT_ENRICHED

#define TXT_ENRICHED   3

Definition at line 68 of file handler.c.

Typedef Documentation

◆ handler_t

typedef int(* handler_t) (struct Body *b, struct State *s)

Definition at line 80 of file handler.c.

Function Documentation

◆ print_part_line()

static void print_part_line ( struct State s,
struct Body b,
int  n 
)
static

Print a separator for the Mime part.

Parameters
sState of text being processed
bBody of the email
nPart number for multipart emails (0 otherwise)

Definition at line 88 of file handler.c.

89 {
90  char length[5];
91  mutt_str_pretty_size(length, sizeof(length), b->length);
93  char *charset = mutt_param_get(&b->parameter, "charset");
94  if (n == 0)
95  {
96  state_printf(s, _("[-- Type: %s/%s%s%s, Encoding: %s, Size: %s --]\n"),
97  TYPE(b), b->subtype, charset ? "; charset=" : "",
98  charset ? charset : "", ENCODING(b->encoding), length);
99  }
100  else
101  {
102  state_printf(s, _("[-- Alternative Type #%d: %s/%s%s%s, Encoding: %s, Size: %s --]\n"),
103  n, TYPE(b), b->subtype, charset ? "; charset=" : "",
104  charset ? charset : "", ENCODING(b->encoding), length);
105  }
106 }
#define ENCODING(x)
Definition: mime.h:92
#define TYPE(body)
Definition: mime.h:89
#define _(a)
Definition: message.h:28
void mutt_str_pretty_size(char *buf, size_t buflen, size_t num)
Display an abbreviated size, like 3.4K.
Definition: muttlib.c:1679
char * mutt_param_get(const struct ParameterList *pl, const char *s)
Find a matching Parameter.
Definition: parameter.c:84
int state_printf(struct State *s, const char *fmt,...)
Write a formatted string to the State.
Definition: state.c:185
void state_mark_attach(struct State *s)
Write a unique marker around content.
Definition: state.c:71
LOFF_T length
length (in bytes) of attachment
Definition: body.h:52
struct ParameterList parameter
Parameters of the content-type.
Definition: body.h:61
char * subtype
content-type subtype
Definition: body.h:59
unsigned int encoding
content-transfer-encoding, ContentEncoding
Definition: body.h:40
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◆ convert_to_state()

static void convert_to_state ( iconv_t  cd,
char *  bufi,
size_t *  l,
struct State s 
)
static

Convert text and write it to a file.

Parameters
cdIconv conversion descriptor
bufiBuffer with text to convert
lLength of buffer
sState to write to

Definition at line 115 of file handler.c.

116 {
117  char bufo[BUFO_SIZE];
118  const char *ib = NULL;
119  char *ob = NULL;
120  size_t ibl, obl;
121 
122  if (!bufi)
123  {
124  if (cd != (iconv_t) (-1))
125  {
126  ob = bufo;
127  obl = sizeof(bufo);
128  iconv(cd, NULL, NULL, &ob, &obl);
129  if (ob != bufo)
130  state_prefix_put(s, bufo, ob - bufo);
131  }
132  return;
133  }
134 
135  if (cd == (iconv_t) (-1))
136  {
137  state_prefix_put(s, bufi, *l);
138  *l = 0;
139  return;
140  }
141 
142  ib = bufi;
143  ibl = *l;
144  while (true)
145  {
146  ob = bufo;
147  obl = sizeof(bufo);
148  mutt_ch_iconv(cd, &ib, &ibl, &ob, &obl, 0, "?", NULL);
149  if (ob == bufo)
150  break;
151  state_prefix_put(s, bufo, ob - bufo);
152  }
153  memmove(bufi, ib, ibl);
154  *l = ibl;
155 }
#define BUFO_SIZE
Definition: handler.c:64
size_t mutt_ch_iconv(iconv_t cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft, const char **inrepls, const char *outrepl, int *iconverrno)
Change the encoding of a string.
Definition: charset.c:629
void state_prefix_put(struct State *s, const char *buf, size_t buflen)
Write a prefixed fixed-string to the State.
Definition: state.c:203
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◆ decode_xbit()

static void decode_xbit ( struct State s,
long  len,
bool  istext,
iconv_t  cd 
)
static

Decode xbit-encoded text.

Parameters
sState to work with
lenLength of text to decode
istextMime part is plain text
cdIconv conversion descriptor

Definition at line 164 of file handler.c.

165 {
166  if (!istext)
167  {
168  mutt_file_copy_bytes(s->fp_in, s->fp_out, len);
169  return;
170  }
171 
172  state_set_prefix(s);
173 
174  int c;
175  char bufi[BUFI_SIZE];
176  size_t l = 0;
177  while (((c = fgetc(s->fp_in)) != EOF) && len--)
178  {
179  if ((c == '\r') && len)
180  {
181  const int ch = fgetc(s->fp_in);
182  if (ch == '\n')
183  {
184  c = ch;
185  len--;
186  }
187  else
188  ungetc(ch, s->fp_in);
189  }
190 
191  bufi[l++] = c;
192  if (l == sizeof(bufi))
193  convert_to_state(cd, bufi, &l, s);
194  }
195 
196  convert_to_state(cd, bufi, &l, s);
197  convert_to_state(cd, 0, 0, s);
198 
200 }
int mutt_file_copy_bytes(FILE *fp_in, FILE *fp_out, size_t size)
Copy some content from one file to another.
Definition: file.c:241
#define BUFI_SIZE
Definition: handler.c:63
static void convert_to_state(iconv_t cd, char *bufi, size_t *l, struct State *s)
Convert text and write it to a file.
Definition: handler.c:115
#define state_set_prefix(state)
Definition: state.h:53
#define state_reset_prefix(state)
Definition: state.h:54
FILE * fp_out
File to write to.
Definition: state.h:47
FILE * fp_in
File to read from.
Definition: state.h:46
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◆ qp_decode_triple()

static int qp_decode_triple ( char *  s,
char *  d 
)
static

Decode a quoted-printable triplet.

Parameters
sState to work with
dDecoded character
Return values
0Success
-1Error

Definition at line 209 of file handler.c.

210 {
211  /* soft line break */
212  if ((s[0] == '=') && (s[1] == '\0'))
213  return 1;
214 
215  /* quoted-printable triple */
216  if ((s[0] == '=') && isxdigit((unsigned char) s[1]) && isxdigit((unsigned char) s[2]))
217  {
218  *d = (hexval(s[1]) << 4) | hexval(s[2]);
219  return 0;
220  }
221 
222  /* something else */
223  return -1;
224 }
#define hexval(ch)
Definition: mime.h:80
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◆ qp_decode_line()

static void qp_decode_line ( char *  dest,
char *  src,
size_t *  l,
int  last 
)
static

Decode a line of quoted-printable text.

Parameters
destBuffer for result
srcText to decode
lBytes written to buffer
lastLast character of the line

Definition at line 233 of file handler.c.

234 {
235  char *d = NULL, *s = NULL;
236  char c = 0;
237 
238  int kind = -1;
239  bool soft = false;
240 
241  /* decode the line */
242 
243  for (d = dest, s = src; *s;)
244  {
245  switch ((kind = qp_decode_triple(s, &c)))
246  {
247  case 0:
248  *d++ = c;
249  s += 3;
250  break; /* qp triple */
251  case -1:
252  *d++ = *s++;
253  break; /* single character */
254  case 1:
255  soft = true;
256  s++;
257  break; /* soft line break */
258  }
259  }
260 
261  if (!soft && (last == '\n'))
262  {
263  /* neither \r nor \n as part of line-terminating CRLF
264  * may be qp-encoded, so remove \r and \n-terminate;
265  * see RFC2045, sect. 6.7, (1): General 8bit representation */
266  if ((kind == 0) && (c == '\r'))
267  *(d - 1) = '\n';
268  else
269  *d++ = '\n';
270  }
271 
272  *d = '\0';
273  *l = d - dest;
274 }
static int qp_decode_triple(char *s, char *d)
Decode a quoted-printable triplet.
Definition: handler.c:209
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◆ decode_quoted()

static void decode_quoted ( struct State s,
long  len,
bool  istext,
iconv_t  cd 
)
static

Decode an attachment encoded with quoted-printable.

Parameters
sState to work with
lenLength of text to decode
istextMime part is plain text
cdIconv conversion descriptor

Why doesn't this overflow any buffers? First, it's guaranteed that the length of a line grows when you en-code it to quoted-printable. That means that we always can store the result in a buffer of at most the same size.

Now, we don't special-case if the line we read with fgets() isn't terminated. We don't care about this, since 256 > 78, so corrupted input will just be corrupted a bit more. That implies that 256+1 bytes are always sufficient to store the result of qp_decode_line.

Finally, at soft line breaks, some part of a multibyte character may have been left over by convert_to_state(). This shouldn't be more than 6 characters, so 256+7 should be sufficient memory to store the decoded data.

Just to make sure that I didn't make some off-by-one error above, we just use 512 for the target buffer's size.

Definition at line 301 of file handler.c.

302 {
303  char line[256];
304  char decline[512];
305  size_t l = 0;
306  size_t l3;
307 
308  if (istext)
309  state_set_prefix(s);
310 
311  while (len > 0)
312  {
313  /* It's ok to use a fixed size buffer for input, even if the line turns
314  * out to be longer than this. Just process the line in chunks. This
315  * really shouldn't happen according the MIME spec, since Q-P encoded
316  * lines are at most 76 characters, but we should be liberal about what
317  * we accept. */
318  if (!fgets(line, MIN((ssize_t) sizeof(line), len + 1), s->fp_in))
319  break;
320 
321  size_t linelen = strlen(line);
322  len -= linelen;
323 
324  /* inspect the last character we read so we can tell if we got the
325  * entire line. */
326  const int last = (linelen != 0) ? line[linelen - 1] : 0;
327 
328  /* chop trailing whitespace if we got the full line */
329  if (last == '\n')
330  {
331  while ((linelen > 0) && IS_SPACE(line[linelen - 1]))
332  linelen--;
333  line[linelen] = '\0';
334  }
335 
336  /* decode and do character set conversion */
337  qp_decode_line(decline + l, line, &l3, last);
338  l += l3;
339  convert_to_state(cd, decline, &l, s);
340  }
341 
342  convert_to_state(cd, 0, 0, s);
344 }
static void qp_decode_line(char *dest, char *src, size_t *l, int last)
Decode a line of quoted-printable text.
Definition: handler.c:233
#define MIN(a, b)
Definition: memory.h:31
#define IS_SPACE(ch)
Definition: string2.h:38
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◆ decode_byte()

static unsigned char decode_byte ( char  ch)
static

Decode a uuencoded byte.

Parameters
chCharacter to decode
Return values
numDecoded value

Definition at line 351 of file handler.c.

352 {
353  if ((ch < 32) || (ch > 95))
354  return 0;
355  return ch - 32;
356 }
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◆ decode_uuencoded()

static void decode_uuencoded ( struct State s,
long  len,
bool  istext,
iconv_t  cd 
)
static

Decode uuencoded text.

Parameters
sState to work with
lenLength of text to decode
istextMime part is plain text
cdIconv conversion descriptor

Definition at line 365 of file handler.c.

366 {
367  char tmps[128];
368  char *pt = NULL;
369  char bufi[BUFI_SIZE];
370  size_t k = 0;
371 
372  if (istext)
373  state_set_prefix(s);
374 
375  while (len > 0)
376  {
377  if (!fgets(tmps, sizeof(tmps), s->fp_in))
378  return;
379  len -= mutt_str_len(tmps);
380  if (mutt_str_startswith(tmps, "begin "))
381  break;
382  }
383  while (len > 0)
384  {
385  if (!fgets(tmps, sizeof(tmps), s->fp_in))
386  return;
387  len -= mutt_str_len(tmps);
388  if (mutt_str_startswith(tmps, "end"))
389  break;
390  pt = tmps;
391  const unsigned char linelen = decode_byte(*pt);
392  pt++;
393  for (unsigned char c = 0; c < linelen;)
394  {
395  for (char l = 2; l <= 6; l += 2)
396  {
397  char out = decode_byte(*pt) << l;
398  pt++;
399  out |= (decode_byte(*pt) >> (6 - l));
400  bufi[k++] = out;
401  c++;
402  if (c == linelen)
403  break;
404  }
405  convert_to_state(cd, bufi, &k, s);
406  pt++;
407  }
408  }
409 
410  convert_to_state(cd, bufi, &k, s);
411  convert_to_state(cd, 0, 0, s);
412 
414 }
static unsigned char decode_byte(char ch)
Decode a uuencoded byte.
Definition: handler.c:351
size_t mutt_str_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix.
Definition: string.c:160
size_t mutt_str_len(const char *a)
Calculate the length of a string, safely.
Definition: string.c:664
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◆ is_mmnoask()

static bool is_mmnoask ( const char *  buf)
static

Metamail compatibility: should the attachment be autoviewed?

Parameters
bufMime type, e.g. 'text/plain'
Return values
trueMetamail "no ask" is true

Test if the MM_NOASK environment variable should allow autoviewing of the attachment.

Note
If MM_NOASK=1 then the function will automatically return true.

Definition at line 426 of file handler.c.

427 {
428  const char *val = mutt_str_getenv("MM_NOASK");
429  if (!val)
430  return false;
431 
432  char *p = NULL;
433  char tmp[1024];
434  char *q = NULL;
435 
436  if (mutt_str_equal(val, "1"))
437  return true;
438 
439  mutt_str_copy(tmp, val, sizeof(tmp));
440  p = tmp;
441 
442  while ((p = strtok(p, ",")))
443  {
444  q = strrchr(p, '/');
445  if (q)
446  {
447  if (q[1] == '*')
448  {
449  if (mutt_istrn_equal(buf, p, q - p))
450  return true;
451  }
452  else
453  {
454  if (mutt_istr_equal(buf, p))
455  return true;
456  }
457  }
458  else
459  {
460  const size_t plen = mutt_istr_startswith(buf, p);
461  if ((plen != 0) && (buf[plen] == '/'))
462  return true;
463  }
464 
465  p = NULL;
466  }
467 
468  return false;
469 }
bool mutt_istr_equal(const char *a, const char *b)
Compare two strings, ignoring case.
Definition: string.c:916
bool mutt_str_equal(const char *a, const char *b)
Compare two strings.
Definition: string.c:904
const char * mutt_str_getenv(const char *name)
Get an environment variable.
Definition: string.c:1024
size_t mutt_str_copy(char *dest, const char *src, size_t dsize)
Copy a string into a buffer (guaranteeing NUL-termination)
Definition: string.c:749
size_t mutt_istr_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix, ignoring case.
Definition: string.c:172
bool mutt_istrn_equal(const char *a, const char *b, size_t num)
Check for equality of two strings ignoring case (to a maximum), safely.
Definition: string.c:621
static size_t plen
Length of cached packet.
Definition: pgppacket.c:39
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◆ is_autoview()

static bool is_autoview ( struct Body b)
static

Should email body be filtered by mailcap.

Parameters
bBody of the email
Return values
1body part should be filtered by a mailcap entry prior to viewing inline
0otherwise

Definition at line 477 of file handler.c.

478 {
479  char type[256];
480  bool is_av = false;
481 
482  snprintf(type, sizeof(type), "%s/%s", TYPE(b), b->subtype);
483 
484  const bool c_implicit_autoview =
485  cs_subset_bool(NeoMutt->sub, "implicit_autoview");
486  if (c_implicit_autoview)
487  {
488  /* $implicit_autoview is essentially the same as "auto_view *" */
489  is_av = true;
490  }
491  else
492  {
493  /* determine if this type is on the user's auto_view list */
494  mutt_check_lookup_list(b, type, sizeof(type));
495  struct ListNode *np = NULL;
496  STAILQ_FOREACH(np, &AutoViewList, entries)
497  {
498  int i = mutt_str_len(np->data) - 1;
499  if (((i > 0) && (np->data[i - 1] == '/') && (np->data[i] == '*') &&
500  mutt_istrn_equal(type, np->data, i)) ||
501  mutt_istr_equal(type, np->data))
502  {
503  is_av = true;
504  break;
505  }
506  }
507 
508  if (is_mmnoask(type))
509  is_av = true;
510  }
511 
512  /* determine if there is a mailcap entry suitable for auto_view
513  *
514  * @warning type is altered by this call as a result of 'mime_lookup' support */
515  if (is_av)
516  return mailcap_lookup(b, type, sizeof(type), NULL, MUTT_MC_AUTOVIEW);
517 
518  return false;
519 }
static bool is_mmnoask(const char *buf)
Metamail compatibility: should the attachment be autoviewed?
Definition: handler.c:426
bool cs_subset_bool(const struct ConfigSubset *sub, const char *name)
Get a boolean config item by name.
Definition: helpers.c:73
bool mailcap_lookup(struct Body *a, char *type, size_t typelen, struct MailcapEntry *entry, enum MailcapLookup opt)
Find given type in the list of mailcap files.
Definition: mailcap.c:475
@ MUTT_MC_AUTOVIEW
Mailcap autoview field.
Definition: mailcap.h:60
void mutt_check_lookup_list(struct Body *b, char *type, size_t len)
Update the mime type.
Definition: mutt_attach.c:335
struct ListHead AutoViewList
List of mime types to auto view.
Definition: mutt_globals.h:65
#define STAILQ_FOREACH(var, head, field)
Definition: queue.h:352
A List node for strings.
Definition: list.h:35
char * data
String.
Definition: list.h:36
Container for Accounts, Notifications.
Definition: neomutt.h:37
struct ConfigSubset * sub
Inherited config items.
Definition: neomutt.h:39
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◆ run_decode_and_handler()

static int run_decode_and_handler ( struct Body b,
struct State s,
handler_t  handler,
bool  plaintext 
)
static

Run an appropriate decoder for an email.

Parameters
bBody of the email
sState to work with
handlerCallback function to process the content - Implements handler_t
plaintextIs the content in plain text
Return values
0Success
-1Error

Definition at line 1297 of file handler.c.

1299 {
1300  char *save_prefix = NULL;
1301  FILE *fp = NULL;
1302  size_t tmplength = 0;
1303  LOFF_T tmpoffset = 0;
1304  int decode = 0;
1305  int rc = 0;
1306 #ifndef USE_FMEMOPEN
1307  struct Buffer *tempfile = NULL;
1308 #endif
1309 
1310  (void) fseeko(s->fp_in, b->offset, SEEK_SET);
1311 
1312 #ifdef USE_FMEMOPEN
1313  char *temp = NULL;
1314  size_t tempsize = 0;
1315 #endif
1316 
1317  /* see if we need to decode this part before processing it */
1318  if ((b->encoding == ENC_BASE64) || (b->encoding == ENC_QUOTED_PRINTABLE) ||
1319  (b->encoding == ENC_UUENCODED) || (plaintext || mutt_is_text_part(b)))
1320  /* text subtypes may require character set conversion even with 8bit encoding */
1321  {
1322  const int orig_type = b->type;
1323  if (!plaintext)
1324  {
1325  /* decode to a tempfile, saving the original destination */
1326  fp = s->fp_out;
1327 #ifdef USE_FMEMOPEN
1328  s->fp_out = open_memstream(&temp, &tempsize);
1329  if (!s->fp_out)
1330  {
1331  mutt_error(_("Unable to open 'memory stream'"));
1332  mutt_debug(LL_DEBUG1, "Can't open 'memory stream'\n");
1333  return -1;
1334  }
1335 #else
1336  tempfile = mutt_buffer_pool_get();
1337  mutt_buffer_mktemp(tempfile);
1338  s->fp_out = mutt_file_fopen(mutt_buffer_string(tempfile), "w");
1339  if (!s->fp_out)
1340  {
1341  mutt_error(_("Unable to open temporary file"));
1342  mutt_debug(LL_DEBUG1, "Can't open %s\n", mutt_buffer_string(tempfile));
1343  mutt_buffer_pool_release(&tempfile);
1344  return -1;
1345  }
1346 #endif
1347  /* decoding the attachment changes the size and offset, so save a copy
1348  * of the "real" values now, and restore them after processing */
1349  tmplength = b->length;
1350  tmpoffset = b->offset;
1351 
1352  /* if we are decoding binary bodies, we don't want to prefix each
1353  * line with the prefix or else the data will get corrupted. */
1354  save_prefix = s->prefix;
1355  s->prefix = NULL;
1356 
1357  decode = 1;
1358  }
1359  else
1360  b->type = TYPE_TEXT;
1361 
1362  mutt_decode_attachment(b, s);
1363 
1364  if (decode)
1365  {
1366  b->length = ftello(s->fp_out);
1367  b->offset = 0;
1368 #ifdef USE_FMEMOPEN
1369  /* When running under torify, mutt_file_fclose(&s->fp_out) does not seem to
1370  * update tempsize. On the other hand, fflush does. See
1371  * https://github.com/neomutt/neomutt/issues/440 */
1372  fflush(s->fp_out);
1373 #endif
1374  mutt_file_fclose(&s->fp_out);
1375 
1376  /* restore final destination and substitute the tempfile for input */
1377  s->fp_out = fp;
1378  fp = s->fp_in;
1379 #ifdef USE_FMEMOPEN
1380  if (tempsize)
1381  {
1382  s->fp_in = fmemopen(temp, tempsize, "r");
1383  }
1384  else
1385  { /* fmemopen can't handle zero-length buffers */
1386  s->fp_in = mutt_file_fopen("/dev/null", "r");
1387  }
1388  if (!s->fp_in)
1389  {
1390  mutt_perror(_("failed to re-open 'memory stream'"));
1391  FREE(&temp);
1392  return -1;
1393  }
1394 #else
1395  s->fp_in = fopen(mutt_buffer_string(tempfile), "r");
1396  unlink(mutt_buffer_string(tempfile));
1397  mutt_buffer_pool_release(&tempfile);
1398 #endif
1399  /* restore the prefix */
1400  s->prefix = save_prefix;
1401  }
1402 
1403  b->type = orig_type;
1404  }
1405 
1406  /* process the (decoded) body part */
1407  if (handler)
1408  {
1409  rc = handler(b, s);
1410  if (rc != 0)
1411  {
1412  mutt_debug(LL_DEBUG1, "Failed on attachment of type %s/%s\n", TYPE(b),
1413  NONULL(b->subtype));
1414  }
1415 
1416  if (decode)
1417  {
1418  b->length = tmplength;
1419  b->offset = tmpoffset;
1420 
1421  /* restore the original source stream */
1422  mutt_file_fclose(&s->fp_in);
1423  s->fp_in = fp;
1424  }
1425  }
1426  s->flags |= MUTT_FIRSTDONE;
1427 #ifdef USE_FMEMOPEN
1428  FREE(&temp);
1429 #endif
1430 
1431  return rc;
1432 }
static const char * mutt_buffer_string(const struct Buffer *buf)
Convert a buffer to a const char * "string".
Definition: buffer.h:77
int mutt_file_fclose(FILE **fp)
Close a FILE handle (and NULL the pointer)
Definition: file.c:153
FILE * mutt_file_fopen(const char *path, const char *mode)
Call fopen() safely.
Definition: file.c:593
#define mutt_error(...)
Definition: logging.h:87
#define mutt_debug(LEVEL,...)
Definition: logging.h:84
#define mutt_perror(...)
Definition: logging.h:88
void mutt_decode_attachment(struct Body *b, struct State *s)
Decode an email's attachment.
Definition: handler.c:1854
@ LL_DEBUG1
Log at debug level 1.
Definition: logging.h:40
#define FREE(x)
Definition: memory.h:40
@ ENC_UUENCODED
UUEncoded text.
Definition: mime.h:54
@ ENC_BASE64
Base-64 encoded text.
Definition: mime.h:52
@ ENC_QUOTED_PRINTABLE
Quoted-printable text.
Definition: mime.h:51
@ TYPE_TEXT
Type: 'text/*'.
Definition: mime.h:38
bool mutt_is_text_part(struct Body *b)
Is this part of an email in plain text?
Definition: muttlib.c:434
#define mutt_buffer_mktemp(buf)
Definition: muttlib.h:74
void mutt_buffer_pool_release(struct Buffer **pbuf)
Free a Buffer from the pool.
Definition: pool.c:112
struct Buffer * mutt_buffer_pool_get(void)
Get a Buffer from the pool.
Definition: pool.c:101
#define MUTT_FIRSTDONE
The first attachment has been done.
Definition: state.h:39
#define NONULL(x)
Definition: string2.h:37
LOFF_T offset
offset where the actual data begins
Definition: body.h:51
unsigned int type
content-type primary type, ContentType
Definition: body.h:39
String manipulation buffer.
Definition: buffer.h:34
StateFlags flags
Flags, e.g. MUTT_DISPLAY.
Definition: state.h:49
char * prefix
String to add to the beginning of each output line.
Definition: state.h:48
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◆ mutt_decode_base64()

void mutt_decode_base64 ( struct State s,
size_t  len,
bool  istext,
iconv_t  cd 
)

Decode base64-encoded text.

Parameters
sState to work with
lenLength of text to decode
istextMime part is plain text
cdIconv conversion descriptor

Definition at line 1498 of file handler.c.

1499 {
1500  char buf[5];
1501  int ch, i;
1502  bool cr = false;
1503  char bufi[BUFI_SIZE];
1504  size_t l = 0;
1505 
1506  buf[4] = '\0';
1507 
1508  if (istext)
1509  state_set_prefix(s);
1510 
1511  while (len > 0)
1512  {
1513  for (i = 0; (i < 4) && (len > 0); len--)
1514  {
1515  ch = fgetc(s->fp_in);
1516  if (ch == EOF)
1517  break;
1518  if ((ch >= 0) && (ch < 128) && ((base64val(ch) != -1) || (ch == '=')))
1519  buf[i++] = ch;
1520  }
1521  if (i != 4)
1522  {
1523  /* "i" may be zero if there is trailing whitespace, which is not an error */
1524  if (i != 0)
1525  mutt_debug(LL_DEBUG2, "didn't get a multiple of 4 chars\n");
1526  break;
1527  }
1528 
1529  const int c1 = base64val(buf[0]);
1530  const int c2 = base64val(buf[1]);
1531 
1532  /* first char */
1533  ch = (c1 << 2) | (c2 >> 4);
1534 
1535  if (cr && (ch != '\n'))
1536  bufi[l++] = '\r';
1537 
1538  cr = false;
1539 
1540  if (istext && (ch == '\r'))
1541  cr = true;
1542  else
1543  bufi[l++] = ch;
1544 
1545  /* second char */
1546  if (buf[2] == '=')
1547  break;
1548  const int c3 = base64val(buf[2]);
1549  ch = ((c2 & 0xf) << 4) | (c3 >> 2);
1550 
1551  if (cr && (ch != '\n'))
1552  bufi[l++] = '\r';
1553 
1554  cr = false;
1555 
1556  if (istext && (ch == '\r'))
1557  cr = true;
1558  else
1559  bufi[l++] = ch;
1560 
1561  /* third char */
1562  if (buf[3] == '=')
1563  break;
1564  const int c4 = base64val(buf[3]);
1565  ch = ((c3 & 0x3) << 6) | c4;
1566 
1567  if (cr && (ch != '\n'))
1568  bufi[l++] = '\r';
1569 
1570  cr = false;
1571 
1572  if (istext && (ch == '\r'))
1573  cr = true;
1574  else
1575  bufi[l++] = ch;
1576 
1577  if ((l + 8) >= sizeof(bufi))
1578  convert_to_state(cd, bufi, &l, s);
1579  }
1580 
1581  if (cr)
1582  bufi[l++] = '\r';
1583 
1584  convert_to_state(cd, bufi, &l, s);
1585  convert_to_state(cd, 0, 0, s);
1586 
1587  state_reset_prefix(s);
1588 }
#define base64val(ch)
Definition: base64.h:30
@ LL_DEBUG2
Log at debug level 2.
Definition: logging.h:41
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◆ mutt_body_handler()

int mutt_body_handler ( struct Body b,
struct State s 
)

Handler for the Body of an email.

Parameters
bBody of the email
sState to work with
Return values
0Success
-1Error

Definition at line 1597 of file handler.c.

1598 {
1599  if (!b || !s)
1600  return -1;
1601 
1602  bool plaintext = false;
1603  handler_t handler = NULL;
1604  handler_t encrypted_handler = NULL;
1605  int rc = 0;
1606  static unsigned short recurse_level = 0;
1607 
1608  int oflags = s->flags;
1609 
1610  if (recurse_level >= MUTT_MIME_MAX_DEPTH)
1611  {
1612  mutt_debug(LL_DEBUG1, "recurse level too deep. giving up.\n");
1613  return 1;
1614  }
1615  recurse_level++;
1616 
1617  /* first determine which handler to use to process this part */
1618 
1619  if (is_autoview(b))
1620  {
1621  handler = autoview_handler;
1622  s->flags &= ~MUTT_CHARCONV;
1623  }
1624  else if (b->type == TYPE_TEXT)
1625  {
1626  if (mutt_istr_equal("plain", b->subtype))
1627  {
1628  const bool c_reflow_text = cs_subset_bool(NeoMutt->sub, "reflow_text");
1629  /* avoid copying this part twice since removing the transfer-encoding is
1630  * the only operation needed. */
1631  if (((WithCrypto & APPLICATION_PGP) != 0) && mutt_is_application_pgp(b))
1632  {
1633  encrypted_handler = crypt_pgp_application_handler;
1634  handler = encrypted_handler;
1635  }
1636  else if (c_reflow_text && mutt_istr_equal("flowed", mutt_param_get(&b->parameter, "format")))
1637  {
1638  handler = rfc3676_handler;
1639  }
1640  else
1641  {
1642  handler = text_plain_handler;
1643  }
1644  }
1645  else if (mutt_istr_equal("enriched", b->subtype))
1646  handler = text_enriched_handler;
1647  else /* text body type without a handler */
1648  plaintext = false;
1649  }
1650  else if (b->type == TYPE_MESSAGE)
1651  {
1652  if (mutt_is_message_type(b->type, b->subtype))
1653  handler = message_handler;
1654  else if (mutt_istr_equal("delivery-status", b->subtype))
1655  plaintext = true;
1656  else if (mutt_istr_equal("external-body", b->subtype))
1657  handler = external_body_handler;
1658  }
1659  else if (b->type == TYPE_MULTIPART)
1660  {
1661  const char *const c_show_multipart_alternative =
1662  cs_subset_string(NeoMutt->sub, "show_multipart_alternative");
1663  if (!mutt_str_equal("inline", c_show_multipart_alternative) &&
1664  mutt_istr_equal("alternative", b->subtype))
1665  {
1666  handler = alternative_handler;
1667  }
1668  else if (!mutt_str_equal("inline", c_show_multipart_alternative) &&
1669  mutt_istr_equal("multilingual", b->subtype))
1670  {
1671  handler = multilingual_handler;
1672  }
1673  else if ((WithCrypto != 0) && mutt_istr_equal("signed", b->subtype))
1674  {
1675  if (!mutt_param_get(&b->parameter, "protocol"))
1676  mutt_error(_("Error: multipart/signed has no protocol"));
1677  else if (s->flags & MUTT_VERIFY)
1678  handler = mutt_signed_handler;
1679  }
1681  {
1682  encrypted_handler = valid_pgp_encrypted_handler;
1683  handler = encrypted_handler;
1684  }
1686  {
1687  encrypted_handler = malformed_pgp_encrypted_handler;
1688  handler = encrypted_handler;
1689  }
1690 
1691  if (!handler)
1692  handler = multipart_handler;
1693 
1694  if ((b->encoding != ENC_7BIT) && (b->encoding != ENC_8BIT) && (b->encoding != ENC_BINARY))
1695  {
1696  mutt_debug(LL_DEBUG1, "Bad encoding type %d for multipart entity, assuming 7 bit\n",
1697  b->encoding);
1698  b->encoding = ENC_7BIT;
1699  }
1700  }
1701  else if ((WithCrypto != 0) && (b->type == TYPE_APPLICATION))
1702  {
1703  if (OptDontHandlePgpKeys && mutt_istr_equal("pgp-keys", b->subtype))
1704  {
1705  /* pass raw part through for key extraction */
1706  plaintext = true;
1707  }
1708  else if (((WithCrypto & APPLICATION_PGP) != 0) && mutt_is_application_pgp(b))
1709  {
1710  encrypted_handler = crypt_pgp_application_handler;
1711  handler = encrypted_handler;
1712  }
1713  else if (((WithCrypto & APPLICATION_SMIME) != 0) && mutt_is_application_smime(b))
1714  {
1715  encrypted_handler = crypt_smime_application_handler;
1716  handler = encrypted_handler;
1717  }
1718  }
1719 
1720  const bool c_honor_disposition =
1721  cs_subset_bool(NeoMutt->sub, "honor_disposition");
1722  /* only respect disposition == attachment if we're not
1723  * displaying from the attachment menu (i.e. pager) */
1724  if ((!c_honor_disposition || ((b->disposition != DISP_ATTACH) || OptViewAttach)) &&
1725  (plaintext || handler))
1726  {
1727  /* Prevent encrypted attachments from being included in replies
1728  * unless $include_encrypted is set. */
1729  const bool c_include_encrypted =
1730  cs_subset_bool(NeoMutt->sub, "include_encrypted");
1731  if ((s->flags & MUTT_REPLYING) && (s->flags & MUTT_FIRSTDONE) &&
1732  encrypted_handler && !c_include_encrypted)
1733  {
1734  goto cleanup;
1735  }
1736 
1737  rc = run_decode_and_handler(b, s, handler, plaintext);
1738  }
1739  /* print hint to use attachment menu for disposition == attachment
1740  * if we're not already being called from there */
1741  else if (s->flags & MUTT_DISPLAY)
1742  {
1743  struct Buffer msg = mutt_buffer_make(256);
1744 
1745  if (!OptViewAttach)
1746  {
1747  char keystroke[128] = { 0 };
1748  if (km_expand_key(keystroke, sizeof(keystroke),
1749  km_find_func(MENU_PAGER, OP_VIEW_ATTACHMENTS)))
1750  {
1751  if (c_honor_disposition && (b->disposition == DISP_ATTACH))
1752  {
1753  /* L10N: %s expands to a keystroke/key binding, e.g. 'v'. */
1754  mutt_buffer_printf(&msg, _("[-- This is an attachment (use '%s' to view this part) --]\n"),
1755  keystroke);
1756  }
1757  else
1758  {
1759  /* L10N: %s/%s is a MIME type, e.g. "text/plain".
1760  The last %s expands to a keystroke/key binding, e.g. 'v'. */
1761  mutt_buffer_printf(&msg, _("[-- %s/%s is unsupported (use '%s' to view this part) --]\n"),
1762  TYPE(b), b->subtype, keystroke);
1763  }
1764  }
1765  else
1766  {
1767  if (c_honor_disposition && (b->disposition == DISP_ATTACH))
1768  {
1769  mutt_buffer_strcpy(&msg, _("[-- This is an attachment (need "
1770  "'view-attachments' bound to key) --]\n"));
1771  }
1772  else
1773  {
1774  /* L10N: %s/%s is a MIME type, e.g. "text/plain". */
1775  mutt_buffer_printf(&msg, _("[-- %s/%s is unsupported (need 'view-attachments' bound to key) --]\n"),
1776  TYPE(b), b->subtype);
1777  }
1778  }
1779  }
1780  else
1781  {
1782  if (c_honor_disposition && (b->disposition == DISP_ATTACH))
1783  {
1784  mutt_buffer_strcpy(&msg, _("[-- This is an attachment --]\n"));
1785  }
1786  else
1787  {
1788  /* L10N: %s/%s is a MIME type, e.g. "text/plain". */
1789  mutt_buffer_printf(&msg, _("[-- %s/%s is unsupported --]\n"), TYPE(b), b->subtype);
1790  }
1791  }
1792  state_mark_attach(s);
1793  state_printf(s, "%s", mutt_buffer_string(&msg));
1794  mutt_buffer_dealloc(&msg);
1795  }
1796 
1797 cleanup:
1798  recurse_level--;
1799  s->flags = oflags | (s->flags & MUTT_FIRSTDONE);
1800  if (rc != 0)
1801  {
1802  mutt_debug(LL_DEBUG1, "Bailing on attachment of type %s/%s\n", TYPE(b),
1803  NONULL(b->subtype));
1804  }
1805 
1806  return rc;
1807 }
struct Buffer mutt_buffer_make(size_t size)
Make a new buffer on the stack.
Definition: buffer.c:61
size_t mutt_buffer_strcpy(struct Buffer *buf, const char *s)
Copy a string into a Buffer.
Definition: buffer.c:312
void mutt_buffer_dealloc(struct Buffer *buf)
Release the memory allocated by a buffer.
Definition: buffer.c:294
int mutt_buffer_printf(struct Buffer *buf, const char *fmt,...)
Format a string overwriting a Buffer.
Definition: buffer.c:160
SecurityFlags mutt_is_application_pgp(struct Body *b)
Does the message use PGP?
Definition: crypt.c:559
SecurityFlags mutt_is_application_smime(struct Body *b)
Does the message use S/MIME?
Definition: crypt.c:617
int mutt_is_valid_multipart_pgp_encrypted(struct Body *b)
Is this a valid multi-part encrypted message?
Definition: crypt.c:478
SecurityFlags mutt_is_malformed_multipart_pgp_encrypted(struct Body *b)
Check for malformed layout.
Definition: crypt.c:515
static int multipart_handler(struct Body *a, struct State *s)
Handler for multipart emails - Implements handler_t -.
Definition: handler.c:1213
static int message_handler(struct Body *a, struct State *s)
Handler for message/rfc822 body parts - Implements handler_t -.
Definition: handler.c:704
static int malformed_pgp_encrypted_handler(struct Body *b, struct State *s)
Handler for invalid pgp-encrypted emails - Implements handler_t -.
Definition: handler.c:1466
int rfc3676_handler(struct Body *a, struct State *s)
Body handler implementing RFC3676 for format=flowed - Implements handler_t -.
Definition: rfc3676.c:320
int mutt_signed_handler(struct Body *b, struct State *s)
Verify a "multipart/signed" body - Implements handler_t -.
Definition: crypt.c:1152
static int autoview_handler(struct Body *a, struct State *s)
Handler for autoviewable attachments - Implements handler_t -.
Definition: handler.c:524
static int text_plain_handler(struct Body *b, struct State *s)
Handler for plain text - Implements handler_t -.
Definition: handler.c:677
int text_enriched_handler(struct Body *a, struct State *s)
Handler for enriched text - Implements handler_t -.
Definition: enriched.c:459
static int multilingual_handler(struct Body *a, struct State *s)
Handler for multi-lingual emails - Implements handler_t -.
Definition: handler.c:1115
static int alternative_handler(struct Body *a, struct State *s)
Handler for multipart alternative emails - Implements handler_t -.
Definition: handler.c:928
static int valid_pgp_encrypted_handler(struct Body *b, struct State *s)
Handler for valid pgp-encrypted emails - Implements handler_t -.
Definition: handler.c:1437
static int external_body_handler(struct Body *b, struct State *s)
Handler for external-body emails - Implements handler_t -.
Definition: handler.c:756
int crypt_smime_application_handler(struct Body *b, struct State *s)
Wrapper for CryptModuleSpecs::application_handler() - Implements handler_t -.
Definition: cryptglue.c:445
int crypt_pgp_application_handler(struct Body *b, struct State *s)
Wrapper for CryptModuleSpecs::application_handler() - Implements handler_t -.
Definition: cryptglue.c:238
int(* handler_t)(struct Body *b, struct State *s)
Definition: handler.c:80
static bool is_autoview(struct Body *b)
Should email body be filtered by mailcap.
Definition: handler.c:477
static int run_decode_and_handler(struct Body *b, struct State *s, handler_t handler, bool plaintext)
Run an appropriate decoder for an email.
Definition: handler.c:1297
const char * cs_subset_string(const struct ConfigSubset *sub, const char *name)
Get a string config item by name.
Definition: helpers.c:317
struct Keymap * km_find_func(enum MenuType mtype, int func)
Find a function's mapping in a Menu.
Definition: keymap.c:938
int km_expand_key(char *s, size_t len, struct Keymap *map)
Get the key string bound to a Keymap.
Definition: keymap.c:910
@ ENC_7BIT
7-bit text
Definition: mime.h:49
@ ENC_BINARY
Binary.
Definition: mime.h:53
@ ENC_8BIT
8-bit text
Definition: mime.h:50
#define MUTT_MIME_MAX_DEPTH
Definition: mime.h:69
@ TYPE_MESSAGE
Type: 'message/*'.
Definition: mime.h:35
@ TYPE_MULTIPART
Type: 'multipart/*'.
Definition: mime.h:37
@ TYPE_APPLICATION
Type: 'application/*'.
Definition: mime.h:33
@ DISP_ATTACH
Content is attached.
Definition: mime.h:63
#define APPLICATION_PGP
Use PGP to encrypt/sign.
Definition: lib.h:87
#define APPLICATION_SMIME
Use SMIME to encrypt/sign.
Definition: lib.h:88
#define WithCrypto
Definition: lib.h:113
bool OptDontHandlePgpKeys
(pseudo) used to extract PGP keys
Definition: options.h:41
bool OptViewAttach
(pseudo) signals that we are viewing attachments
Definition: options.h:60
bool mutt_is_message_type(int type, const char *subtype)
Determine if a mime type matches a message or not.
Definition: parse.c:1428
#define MUTT_VERIFY
Perform signature verification.
Definition: state.h:33
#define MUTT_CHARCONV
Do character set conversions.
Definition: state.h:36
#define MUTT_DISPLAY
Output is displayed to the user.
Definition: state.h:32
#define MUTT_REPLYING
Are we replying?
Definition: state.h:38
unsigned int disposition
content-disposition, ContentDisposition
Definition: body.h:41
@ MENU_PAGER
Pager pager (email viewer)
Definition: type.h:54
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◆ mutt_can_decode()

bool mutt_can_decode ( struct Body a)

Will decoding the attachment produce any output.

Parameters
aBody of email to test
Return values
trueDecoding the attachment will produce output

Definition at line 1814 of file handler.c.

1815 {
1816  if (is_autoview(a))
1817  return true;
1818  if (a->type == TYPE_TEXT)
1819  return true;
1820  if (a->type == TYPE_MESSAGE)
1821  return true;
1822  if (a->type == TYPE_MULTIPART)
1823  {
1824  if (WithCrypto)
1825  {
1826  if (mutt_istr_equal(a->subtype, "signed") || mutt_istr_equal(a->subtype, "encrypted"))
1827  {
1828  return true;
1829  }
1830  }
1831 
1832  for (struct Body *b = a->parts; b; b = b->next)
1833  {
1834  if (mutt_can_decode(b))
1835  return true;
1836  }
1837  }
1838  else if ((WithCrypto != 0) && (a->type == TYPE_APPLICATION))
1839  {
1840  if (((WithCrypto & APPLICATION_PGP) != 0) && mutt_is_application_pgp(a))
1841  return true;
1843  return true;
1844  }
1845 
1846  return false;
1847 }
bool mutt_can_decode(struct Body *a)
Will decoding the attachment produce any output.
Definition: handler.c:1814
The body of an email.
Definition: body.h:35
struct Body * parts
parts of a multipart or message/rfc822
Definition: body.h:71
struct Body * next
next attachment in the list
Definition: body.h:70
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◆ mutt_decode_attachment()

void mutt_decode_attachment ( struct Body b,
struct State s 
)

Decode an email's attachment.

Parameters
bBody of the email
sState of text being processed

Definition at line 1854 of file handler.c.

1855 {
1856  int istext = mutt_is_text_part(b) && (b->disposition == DISP_INLINE);
1857  iconv_t cd = (iconv_t) (-1);
1858 
1859  if (istext && (b->charset || (s->flags & MUTT_CHARCONV)))
1860  {
1861  const char *charset = b->charset;
1862  if (!charset)
1863  {
1864  const char *const c_assumed_charset =
1865  cs_subset_string(NeoMutt->sub, "assumed_charset");
1866  charset = mutt_param_get(&b->parameter, "charset");
1867  if (!charset && c_assumed_charset)
1868  charset = mutt_ch_get_default_charset();
1869  }
1870  const char *const c_charset = cs_subset_string(NeoMutt->sub, "charset");
1871  if (charset && c_charset)
1872  cd = mutt_ch_iconv_open(c_charset, charset, MUTT_ICONV_HOOK_FROM);
1873  }
1874 
1875  (void) fseeko(s->fp_in, b->offset, SEEK_SET);
1876  switch (b->encoding)
1877  {
1878  case ENC_QUOTED_PRINTABLE:
1879  decode_quoted(s, b->length,
1880  istext || (((WithCrypto & APPLICATION_PGP) != 0) &&
1882  cd);
1883  break;
1884  case ENC_BASE64:
1885  mutt_decode_base64(s, b->length,
1886  istext || (((WithCrypto & APPLICATION_PGP) != 0) &&
1888  cd);
1889  break;
1890  case ENC_UUENCODED:
1891  decode_uuencoded(s, b->length,
1892  istext || (((WithCrypto & APPLICATION_PGP) != 0) &&
1894  cd);
1895  break;
1896  default:
1897  decode_xbit(s, b->length,
1898  istext || (((WithCrypto & APPLICATION_PGP) != 0) &&
1900  cd);
1901  break;
1902  }
1903 
1904  if (cd != (iconv_t) (-1))
1905  iconv_close(cd);
1906 }
static void decode_uuencoded(struct State *s, long len, bool istext, iconv_t cd)
Decode uuencoded text.
Definition: handler.c:365
static void decode_quoted(struct State *s, long len, bool istext, iconv_t cd)
Decode an attachment encoded with quoted-printable.
Definition: handler.c:301
static void decode_xbit(struct State *s, long len, bool istext, iconv_t cd)
Decode xbit-encoded text.
Definition: handler.c:164
void mutt_decode_base64(struct State *s, size_t len, bool istext, iconv_t cd)
Decode base64-encoded text.
Definition: handler.c:1498
@ DISP_INLINE
Content is inline.
Definition: mime.h:62
char * mutt_ch_get_default_charset(void)
Get the default character set.
Definition: charset.c:443
iconv_t mutt_ch_iconv_open(const char *tocode, const char *fromcode, uint8_t flags)
Set up iconv for conversions.
Definition: charset.c:576
#define MUTT_ICONV_HOOK_FROM
apply charset-hooks to fromcode
Definition: charset.h:72
char * charset
Send mode: charset of attached file as stored on disk.
Definition: body.h:77
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