/*
* Copyright notice from original mutt:
* Copyright (C) 1996-2000 Michael R. Elkins <me@mutt.org>
*
* This file is part of mutt-ng, see http://www.muttng.org/.
* It's licensed under the GNU General Public License,
* please see the file GPL in the top level source directory.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include "mutt.h"
#include "ascii.h"
#include "recvattach.h"
#include "handler.h"
#include "mutt_curses.h"
#include "rfc1524.h"
#include "rfc3676.h"
#include "keymap.h"
#include "mime.h"
#include "copy.h"
#include "charset.h"
#include "mutt_crypt.h"
#include "state.h"
#include "attach.h"
#include "lib.h"
#include "lib/mem.h"
#include "lib/intl.h"
#include "lib/str.h"
#include "lib/debug.h"
typedef int handler_f (BODY *, STATE *);
typedef handler_f *handler_t;
int Index_hex[128] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
int Index_64[128] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1
};
void mutt_decode_xbit (STATE * s, long len, int istext, iconv_t cd)
{
int c, ch;
char bufi[BUFI_SIZE];
size_t l = 0;
if (istext) {
state_set_prefix (s);
while ((c = fgetc (s->fpin)) != EOF && len--) {
if (c == '\r' && len) {
if ((ch = fgetc (s->fpin)) == '\n') {
c = ch;
len--;
}
else
ungetc (ch, s->fpin);
}
bufi[l++] = c;
if (l == sizeof (bufi))
mutt_convert_to_state (cd, bufi, &l, s);
}
mutt_convert_to_state (cd, bufi, &l, s);
mutt_convert_to_state (cd, 0, 0, s);
state_reset_prefix (s);
}
else
mutt_copy_bytes (s->fpin, s->fpout, len);
}
static int qp_decode_triple (char *s, char *d)
{
/* soft line break */
if (*s == '=' && !(*(s + 1)))
return 1;
/* quoted-printable triple */
if (*s == '=' &&
isxdigit ((unsigned char) *(s + 1)) &&
isxdigit ((unsigned char) *(s + 2))) {
*d = (hexval (*(s + 1)) << 4) | hexval (*(s + 2));
return 0;
}
/* something else */
return -1;
}
static void qp_decode_line (char *dest, char *src, size_t * l, int last)
{
char *d, *s;
char c;
int kind;
int soft = 0;
/* decode the line */
for (d = dest, s = src; *s;) {
switch ((kind = qp_decode_triple (s, &c))) {
case 0:
*d++ = c;
s += 3;
break; /* qp triple */
case -1:
*d++ = *s++;
break; /* single character */
case 1:
soft = 1;
s++;
break; /* soft line break */
}
}
if (!soft && last == '\n')
*d++ = '\n';
*d = '\0';
*l = d - dest;
}
/*
* Decode an attachment encoded with quoted-printable.
*
* 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 STRING > 78,
* so corrupted input will just be corrupted a bit more. That
* implies that STRING+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 mutt_convert_to_state(). This shouldn't
* be more than 6 characters, so STRING + 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 STRING*2 for the target buffer's size.
*
*/
void mutt_decode_quoted (STATE * s, long len, int istext, iconv_t cd)
{
char line[STRING];
char decline[2 * STRING];
size_t l = 0;
size_t linelen; /* number of input bytes in `line' */
size_t l3;
int last; /* store the last character in the input line */
if (istext)
state_set_prefix (s);
while (len > 0) {
last = 0;
/*
* It's ok to use a fixed size buffer for input, even if the line turns
* out to be longer than this. Just process the line in chunks. This
* really shouldn't happen according the MIME spec, since Q-P encoded
* lines are at most 76 characters, but we should be liberal about what
* we accept.
*/
if (fgets (line, MIN ((ssize_t) sizeof (line), len + 1), s->fpin) == NULL)
break;
linelen = str_len (line);
len -= linelen;
/*
* inspect the last character we read so we can tell if we got the
* entire line.
*/
last = linelen ? line[linelen - 1] : 0;
/* chop trailing whitespace if we got the full line */
if (last == '\n') {
while (linelen > 0 && ISSPACE (line[linelen - 1]))
linelen--;
line[linelen] = 0;
}
/* decode and do character set conversion */
qp_decode_line (decline + l, line, &l3, last);
l += l3;
mutt_convert_to_state (cd, decline, &l, s);
}
mutt_convert_to_state (cd, 0, 0, s);
state_reset_prefix (s);
}
void mutt_decode_base64 (STATE * s, long len, int istext, iconv_t cd)
{
char buf[5];
int c1, c2, c3, c4, ch, cr = 0, i;
char bufi[BUFI_SIZE];
size_t l = 0;
buf[4] = 0;
if (istext)
state_set_prefix (s);
while (len > 0) {
for (i = 0; i < 4 && len > 0; len--) {
if ((ch = fgetc (s->fpin)) == EOF)
break;
if (ch >= 0 && ch < 128 && (base64val (ch) != -1 || ch == '='))
buf[i++] = ch;
}
if (i != 4) {
debug_print (2, ("didn't get a multiple of 4 chars.\n"));
break;
}
c1 = base64val (buf[0]);
c2 = base64val (buf[1]);
ch = (c1 << 2) | (c2 >> 4);
if (cr && ch != '\n')
bufi[l++] = '\r';
cr = 0;
if (istext && ch == '\r')
cr = 1;
else
bufi[l++] = ch;
if (buf[2] == '=')
break;
c3 = base64val (buf[2]);
ch = ((c2 & 0xf) << 4) | (c3 >> 2);
if (cr && ch != '\n')
bufi[l++] = '\r';
cr = 0;
if (istext && ch == '\r')
cr = 1;
else
bufi[l++] = ch;
if (buf[3] == '=')
break;
c4 = base64val (buf[3]);
ch = ((c3 & 0x3) << 6) | c4;
if (cr && ch != '\n')
bufi[l++] = '\r';
cr = 0;
if (istext && ch == '\r')
cr = 1;
else
bufi[l++] = ch;
if (l + 8 >= sizeof (bufi))
mutt_convert_to_state (cd, bufi, &l, s);
}
if (cr)
bufi[l++] = '\r';
mutt_convert_to_state (cd, bufi, &l, s);
mutt_convert_to_state (cd, 0, 0, s);
state_reset_prefix (s);
}
unsigned char decode_byte (char ch)
{
if (ch == 96)
return 0;
return ch - 32;
}
void mutt_decode_uuencoded (STATE * s, long len, int istext, iconv_t cd)
{
char tmps[SHORT_STRING];
char linelen, c, l, out;
char *pt;
char bufi[BUFI_SIZE];
size_t k = 0;
if (istext)
state_set_prefix (s);
while (len > 0) {
if ((fgets (tmps, sizeof (tmps), s->fpin)) == NULL)
return;
len -= str_len (tmps);
if ((!str_ncmp (tmps, "begin", 5)) && ISSPACE (tmps[5]))
break;
}
while (len > 0) {
if ((fgets (tmps, sizeof (tmps), s->fpin)) == NULL)
return;
len -= str_len (tmps);
if (!str_ncmp (tmps, "end", 3))
break;
pt = tmps;
linelen = decode_byte (*pt);
pt++;
for (c = 0; c < linelen;) {
for (l = 2; l <= 6; l += 2) {
out = decode_byte (*pt) << l;
pt++;
out |= (decode_byte (*pt) >> (6 - l));
bufi[k++] = out;
c++;
if (c == linelen)
break;
}
mutt_convert_to_state (cd, bufi, &k, s);
pt++;
}
}
mutt_convert_to_state (cd, bufi, &k, s);
mutt_convert_to_state (cd, 0, 0, s);
state_reset_prefix (s);
}
/* ----------------------------------------------------------------------------
* A (not so) minimal implementation of RFC1563.
*/
#define IndentSize (4)
enum { RICH_PARAM = 0, RICH_BOLD, RICH_UNDERLINE, RICH_ITALIC, RICH_NOFILL,
RICH_INDENT, RICH_INDENT_RIGHT, RICH_EXCERPT, RICH_CENTER, RICH_FLUSHLEFT,
RICH_FLUSHRIGHT, RICH_COLOR, RICH_LAST_TAG
};
static struct {
const char *tag_name;
int index;
} EnrichedTags[] = {
{
"param", RICH_PARAM}, {
"bold", RICH_BOLD}, {
"italic", RICH_ITALIC}, {
"underline", RICH_UNDERLINE}, {
"nofill", RICH_NOFILL}, {
"excerpt", RICH_EXCERPT}, {
"indent", RICH_INDENT}, {
"indentright", RICH_INDENT_RIGHT}, {
"center", RICH_CENTER}, {
"flushleft", RICH_FLUSHLEFT}, {
"flushright", RICH_FLUSHRIGHT}, {
"flushboth", RICH_FLUSHLEFT}, {
"color", RICH_COLOR}, {
"x-color", RICH_COLOR}, {
NULL, -1}
};
struct enriched_state {
char *buffer;
char *line;
char *param;
size_t buff_len;
size_t line_len;
size_t line_used;
size_t line_max;
size_t indent_len;
size_t word_len;
size_t buff_used;
size_t param_used;
size_t param_len;
int tag_level[RICH_LAST_TAG];
int WrapMargin;
STATE *s;
};
static void enriched_wrap (struct enriched_state *stte)
{
int x;
int extra;
if (stte->line_len) {
if (stte->tag_level[RICH_CENTER] || stte->tag_level[RICH_FLUSHRIGHT]) {
/* Strip trailing white space */
size_t y = stte->line_used - 1;
while (y && ISSPACE (stte->line[y])) {
stte->line[y] = '\0';
y--;
stte->line_used--;
stte->line_len--;
}
if (stte->tag_level[RICH_CENTER]) {
/* Strip leading whitespace */
y = 0;
while (stte->line[y] && ISSPACE (stte->line[y]))
y++;
if (y) {
size_t z;
for (z = y; z <= stte->line_used; z++) {
stte->line[z - y] = stte->line[z];
}
stte->line_len -= y;
stte->line_used -= y;
}
}
}
extra = stte->WrapMargin - stte->line_len - stte->indent_len -
(stte->tag_level[RICH_INDENT_RIGHT] * IndentSize);
if (extra > 0) {
if (stte->tag_level[RICH_CENTER]) {
x = extra / 2;
while (x) {
state_putc (' ', stte->s);
x--;
}
}
else if (stte->tag_level[RICH_FLUSHRIGHT]) {
x = extra - 1;
while (x) {
state_putc (' ', stte->s);
x--;
}
}
}
state_puts (stte->line, stte->s);
}
state_putc ('\n', stte->s);
stte->line[0] = '\0';
stte->line_len = 0;
stte->line_used = 0;
stte->indent_len = 0;
if (stte->s->prefix) {
state_puts (stte->s->prefix, stte->s);
stte->indent_len += str_len (stte->s->prefix);
}
if (stte->tag_level[RICH_EXCERPT]) {
x = stte->tag_level[RICH_EXCERPT];
while (x) {
if (stte->s->prefix) {
state_puts (stte->s->prefix, stte->s);
stte->indent_len += str_len (stte->s->prefix);
}
else {
state_puts ("> ", stte->s);
stte->indent_len += str_len ("> ");
}
x--;
}
}
else
stte->indent_len = 0;
if (stte->tag_level[RICH_INDENT]) {
x = stte->tag_level[RICH_INDENT] * IndentSize;
stte->indent_len += x;
while (x) {
state_putc (' ', stte->s);
x--;
}
}
}
static void enriched_flush (struct enriched_state *stte, int wrap)
{
if (!stte->tag_level[RICH_NOFILL] && (stte->line_len + stte->word_len >
(stte->WrapMargin -
(stte->tag_level[RICH_INDENT_RIGHT] *
IndentSize) - stte->indent_len)))
enriched_wrap (stte);
if (stte->buff_used) {
stte->buffer[stte->buff_used] = '\0';
stte->line_used += stte->buff_used;
if (stte->line_used > stte->line_max) {
stte->line_max = stte->line_used;
mem_realloc (&stte->line, stte->line_max + 1);
}
strcat (stte->line, stte->buffer); /* __STRCAT_CHECKED__ */
stte->line_len += stte->word_len;
stte->word_len = 0;
stte->buff_used = 0;
}
if (wrap)
enriched_wrap (stte);
}
static void enriched_putc (int c, struct enriched_state *stte)
{
if (stte->tag_level[RICH_PARAM]) {
if (stte->tag_level[RICH_COLOR]) {
if (stte->param_used + 1 >= stte->param_len)
mem_realloc (&stte->param, (stte->param_len += STRING));
stte->param[stte->param_used++] = c;
}
return; /* nothing to do */
}
/* see if more space is needed (plus extra for possible rich characters) */
if (stte->buff_len < stte->buff_used + 3) {
stte->buff_len += LONG_STRING;
mem_realloc (&stte->buffer, stte->buff_len + 1);
}
if ((!stte->tag_level[RICH_NOFILL] && ISSPACE (c)) || c == '\0') {
if (c == '\t')
stte->word_len += 8 - (stte->line_len + stte->word_len) % 8;
else
stte->word_len++;
stte->buffer[stte->buff_used++] = c;
enriched_flush (stte, 0);
}
else {
if (stte->s->flags & M_DISPLAY) {
if (stte->tag_level[RICH_BOLD]) {
stte->buffer[stte->buff_used++] = c;
stte->buffer[stte->buff_used++] = '\010';
stte->buffer[stte->buff_used++] = c;
}
else if (stte->tag_level[RICH_UNDERLINE]) {
stte->buffer[stte->buff_used++] = '_';
stte->buffer[stte->buff_used++] = '\010';
stte->buffer[stte->buff_used++] = c;
}
else if (stte->tag_level[RICH_ITALIC]) {
stte->buffer[stte->buff_used++] = c;
stte->buffer[stte->buff_used++] = '\010';
stte->buffer[stte->buff_used++] = '_';
}
else {
stte->buffer[stte->buff_used++] = c;
}
}
else {
stte->buffer[stte->buff_used++] = c;
}
stte->word_len++;
}
}
static void enriched_puts (char *s, struct enriched_state *stte)
{
char *c;
if (stte->buff_len < stte->buff_used + str_len (s)) {
stte->buff_len += LONG_STRING;
mem_realloc (&stte->buffer, stte->buff_len + 1);
}
c = s;
while (*c) {
stte->buffer[stte->buff_used++] = *c;
c++;
}
}
static void enriched_set_flags (const char *tag, struct enriched_state *stte)
{
const char *tagptr = tag;
int i, j;
if (*tagptr == '/')
tagptr++;
for (i = 0, j = -1; EnrichedTags[i].tag_name; i++)
if (ascii_strcasecmp (EnrichedTags[i].tag_name, tagptr) == 0) {
j = EnrichedTags[i].index;
break;
}
if (j != -1) {
if (j == RICH_CENTER || j == RICH_FLUSHLEFT || j == RICH_FLUSHRIGHT)
enriched_flush (stte, 1);
if (*tag == '/') {
if (stte->tag_level[j]) /* make sure not to go negative */
stte->tag_level[j]--;
if ((stte->s->flags & M_DISPLAY) && j == RICH_PARAM
&& stte->tag_level[RICH_COLOR]) {
stte->param[stte->param_used] = '\0';
if (!ascii_strcasecmp (stte->param, "black")) {
enriched_puts ("\033[30m", stte);
}
else if (!ascii_strcasecmp (stte->param, "red")) {
enriched_puts ("\033[31m", stte);
}
else if (!ascii_strcasecmp (stte->param, "green")) {
enriched_puts ("\033[32m", stte);
}
else if (!ascii_strcasecmp (stte->param, "yellow")) {
enriched_puts ("\033[33m", stte);
}
else if (!ascii_strcasecmp (stte->param, "blue")) {
enriched_puts ("\033[34m", stte);
}
else if (!ascii_strcasecmp (stte->param, "magenta")) {
enriched_puts ("\033[35m", stte);
}
else if (!ascii_strcasecmp (stte->param, "cyan")) {
enriched_puts ("\033[36m", stte);
}
else if (!ascii_strcasecmp (stte->param, "white")) {
enriched_puts ("\033[37m", stte);
}
}
if ((stte->s->flags & M_DISPLAY) && j == RICH_COLOR) {
enriched_puts ("\033[0m", stte);
}
/* flush parameter buffer when closing the tag */
if (j == RICH_PARAM) {
stte->param_used = 0;
stte->param[0] = '\0';
}
}
else
stte->tag_level[j]++;
if (j == RICH_EXCERPT)
enriched_flush (stte, 1);
}
}
int text_enriched_handler (BODY * a, STATE * s)
{
enum {
TEXT, LANGLE, TAG, BOGUS_TAG, NEWLINE, ST_EOF, DONE
} state = TEXT;
long bytes = a->length;
struct enriched_state stte;
int c = 0;
int tag_len = 0;
char tag[LONG_STRING + 1];
memset (&stte, 0, sizeof (stte));
stte.s = s;
stte.WrapMargin =
((s->flags & M_DISPLAY) ? (COLS - 4) : ((COLS - 4) <
72) ? (COLS - 4) : 72);
stte.line_max = stte.WrapMargin * 4;
stte.line = (char *) mem_calloc (1, stte.line_max + 1);
stte.param = (char *) mem_calloc (1, STRING);
stte.param_len = STRING;
stte.param_used = 0;
if (s->prefix) {
state_puts (s->prefix, s);
stte.indent_len += str_len (s->prefix);
}
while (state != DONE) {
if (state != ST_EOF) {
if (!bytes || (c = fgetc (s->fpin)) == EOF)
state = ST_EOF;
else
bytes--;
}
switch (state) {
case TEXT:
switch (c) {
case '<':
state = LANGLE;
break;
case '\n':
if (stte.tag_level[RICH_NOFILL]) {
enriched_flush (&stte, 1);
}
else {
enriched_putc (' ', &stte);
state = NEWLINE;
}
break;
default:
enriched_putc (c, &stte);
}
break;
case LANGLE:
if (c == '<') {
enriched_putc (c, &stte);
state = TEXT;
break;
}
else {
tag_len = 0;
state = TAG;
}
/* Yes, fall through (it wasn't a <<, so this char is first in TAG) */
case TAG:
if (c == '>') {
tag[tag_len] = '\0';
enriched_set_flags (tag, &stte);
state = TEXT;
}
else if (tag_len < LONG_STRING) /* ignore overly long tags */
tag[tag_len++] = c;
else
state = BOGUS_TAG;
break;
case BOGUS_TAG:
if (c == '>')
state = TEXT;
break;
case NEWLINE:
if (c == '\n')
enriched_flush (&stte, 1);
else {
ungetc (c, s->fpin);
bytes++;
state = TEXT;
}
break;
case ST_EOF:
enriched_putc ('\0', &stte);
enriched_flush (&stte, 1);
state = DONE;
break;
case DONE: /* not reached, but gcc complains if this is absent */
break;
}
}
state_putc ('\n', s); /* add a final newline */
mem_free (&(stte.buffer));
mem_free (&(stte.line));
mem_free (&(stte.param));
return (0);
}
#define TXTHTML 1
#define TXTPLAIN 2
#define TXTENRICHED 3
static int alternative_handler (BODY * a, STATE * s)
{
BODY *choice = NULL;
BODY *b;
LIST *t;
char buf[STRING];
int type = 0;
int mustfree = 0;
int rc = 0;
if (a->encoding == ENCBASE64 || a->encoding == ENCQUOTEDPRINTABLE ||
a->encoding == ENCUUENCODED) {
struct stat st;
mustfree = 1;
fstat (fileno (s->fpin), &st);
b = mutt_new_body ();
b->length = (long) st.st_size;
b->parts = mutt_parse_multipart (s->fpin,
mutt_get_parameter ("boundary",
a->parameter),
(long) st.st_size,
ascii_strcasecmp ("digest",
a->subtype) == 0);
}
else
b = a;
a = b;
/* First, search list of prefered types */
t = AlternativeOrderList;
while (t && !choice) {
char *c;
int btlen; /* length of basetype */
int wild; /* do we have a wildcard to match all subtypes? */
c = strchr (t->data, '/');
if (c) {
wild = (c[1] == '*' && c[2] == 0);
btlen = c - t->data;
}
else {
wild = 1;
btlen = str_len (t->data);
}
if (a && a->parts)
b = a->parts;
else
b = a;
while (b) {
const char *bt = TYPE (b);
if (!ascii_strncasecmp (bt, t->data, btlen) && bt[btlen] == 0) {
/* the basetype matches */
if (wild || !ascii_strcasecmp (t->data + btlen + 1, b->subtype)) {
choice = b;
}
}
b = b->next;
}
t = t->next;
}
/* Next, look for an autoviewable type */
if (!choice) {
if (a && a->parts)
b = a->parts;
else
b = a;
while (b) {
snprintf (buf, sizeof (buf), "%s/%s", TYPE (b), b->subtype);
if (mutt_is_autoview (b, buf)) {
rfc1524_entry *entry = rfc1524_new_entry ();
if (rfc1524_mailcap_lookup (b, buf, entry, M_AUTOVIEW)) {
choice = b;
}
rfc1524_free_entry (&entry);
}
b = b->next;
}
}
/* Then, look for a text entry */
if (!choice) {
if (a && a->parts)
b = a->parts;
else
b = a;
while (b) {
if (b->type == TYPETEXT) {
if (!ascii_strcasecmp ("plain", b->subtype) && type <= TXTPLAIN) {
choice = b;
type = TXTPLAIN;
}
else if (!ascii_strcasecmp ("enriched", b->subtype)
&& type <= TXTENRICHED) {
choice = b;
type = TXTENRICHED;
}
else if (!ascii_strcasecmp ("html", b->subtype) && type <= TXTHTML) {
choice = b;
type = TXTHTML;
}
}
b = b->next;
}
}
/* Finally, look for other possibilities */
if (!choice) {
if (a && a->parts)
b = a->parts;
else
b = a;
while (b) {
if (mutt_can_decode (b))
choice = b;
b = b->next;
}
}
if (choice) {
if (s->flags & M_DISPLAY && !option (OPTWEED)) {
fseeko (s->fpin, choice->hdr_offset, 0);
mutt_copy_bytes (s->fpin, s->fpout,
choice->offset - choice->hdr_offset);
}
mutt_body_handler (choice, s);
}
else if (s->flags & M_DISPLAY) {
/* didn't find anything that we could display! */
state_mark_attach (s);
state_puts (_("[-- Error: Could not display any parts of Multipart/Alternative! --]\n"), s);
rc = -1;
}
if (mustfree)
mutt_free_body (&a);
return (rc);
}
/* handles message/rfc822 body parts */
static int message_handler (BODY * a, STATE * s)
{
struct stat st;
BODY *b;
LOFF_T off_start;
int rc = 0;
off_start = ftello (s->fpin);
if (a->encoding == ENCBASE64 || a->encoding == ENCQUOTEDPRINTABLE ||
a->encoding == ENCUUENCODED) {
fstat (fileno (s->fpin), &st);
b = mutt_new_body ();
b->length = (long) st.st_size;
b->parts = mutt_parse_messageRFC822 (s->fpin, b);
}
else
b = a;
if (b->parts) {
mutt_copy_hdr (s->fpin, s->fpout, off_start, b->parts->offset,
(((s->flags & M_WEED)
|| ((s->flags & (M_DISPLAY | M_PRINTING))
&& option (OPTWEED))) ? (CH_WEED | CH_REORDER) : 0) |
(s->prefix ? CH_PREFIX : 0) | CH_DECODE | CH_FROM,
s->prefix);
if (s->prefix)
state_puts (s->prefix, s);
state_putc ('\n', s);
rc = mutt_body_handler (b->parts, s);
}
if (a->encoding == ENCBASE64 || a->encoding == ENCQUOTEDPRINTABLE ||
a->encoding == ENCUUENCODED)
mutt_free_body (&b);
return (rc);
}
/* returns 1 if decoding the attachment will produce output */
int mutt_can_decode (BODY * a)
{
char type[STRING];
snprintf (type, sizeof (type), "%s/%s", TYPE (a), a->subtype);
if (mutt_is_autoview (a, type))
return (rfc1524_mailcap_lookup (a, type, NULL, M_AUTOVIEW));
else if (a->type == TYPETEXT)
return (1);
else if (a->type == TYPEMESSAGE)
return (1);
else if (a->type == TYPEMULTIPART) {
BODY *p;
if (WithCrypto) {
if (ascii_strcasecmp (a->subtype, "signed") == 0 ||
ascii_strcasecmp (a->subtype, "encrypted") == 0)
return (1);
}
for (p = a->parts; p; p = p->next) {
if (mutt_can_decode (p))
return (1);
}
}
else if (WithCrypto && a->type == TYPEAPPLICATION) {
if ((WithCrypto & APPLICATION_PGP) && mutt_is_application_pgp (a))
return (1);
if ((WithCrypto & APPLICATION_SMIME) && mutt_is_application_smime (a))
return (1);
}
return (0);
}
static int multipart_handler (BODY * a, STATE * s)
{
BODY *b, *p;
char length[5];
struct stat st;
int count;
int rc = 0;
if (a->encoding == ENCBASE64 || a->encoding == ENCQUOTEDPRINTABLE ||
a->encoding == ENCUUENCODED) {
fstat (fileno (s->fpin), &st);
b = mutt_new_body ();
b->length = (long) st.st_size;
b->parts = mutt_parse_multipart (s->fpin,
mutt_get_parameter ("boundary",
a->parameter),
(long) st.st_size,
ascii_strcasecmp ("digest",
a->subtype) == 0);
}
else
b = a;
for (p = b->parts, count = 1; p; p = p->next, count++) {
if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_printf (s, _("[-- Attachment #%d"), count);
if (p->description || p->filename || p->form_name) {
state_puts (": ", s);
state_puts (p->description ? p->description :
p->filename ? p->filename : p->form_name, s);
}
state_puts (" --]\n", s);
mutt_pretty_size (length, sizeof (length), p->length);
state_mark_attach (s);
state_printf (s, _("[-- Type: %s/%s, Encoding: %s, Size: %s --]\n"),
TYPE (p), p->subtype, ENCODING (p->encoding), length);
if (!option (OPTWEED)) {
fseeko (s->fpin, p->hdr_offset, 0);
mutt_copy_bytes (s->fpin, s->fpout, p->offset - p->hdr_offset);
}
else
state_putc ('\n', s);
}
else {
if (p->description && mutt_can_decode (p))
state_printf (s, "Content-Description: %s\n", p->description);
if (p->form_name)
state_printf (s, "%s: \n", p->form_name);
}
rc = mutt_body_handler (p, s);
state_putc ('\n', s);
if (rc || ((s->flags & M_REPLYING)
&& (option (OPTINCLUDEONLYFIRST)) && (s->flags & M_FIRSTDONE)))
break;
}
if (a->encoding == ENCBASE64 || a->encoding == ENCQUOTEDPRINTABLE ||
a->encoding == ENCUUENCODED)
mutt_free_body (&b);
return (rc);
}
static int autoview_handler (BODY * a, STATE * s)
{
rfc1524_entry *entry = rfc1524_new_entry ();
char buffer[LONG_STRING];
char type[STRING];
char command[LONG_STRING];
char tempfile[_POSIX_PATH_MAX] = "";
char *fname;
FILE *fpin = NULL;
FILE *fpout = NULL;
FILE *fperr = NULL;
int piped = FALSE;
pid_t thepid;
int rc = 0;
snprintf (type, sizeof (type), "%s/%s", TYPE (a), a->subtype);
rfc1524_mailcap_lookup (a, type, entry, M_AUTOVIEW);
fname = str_dup (a->filename);
mutt_sanitize_filename (fname, 1);
rfc1524_expand_filename (entry->nametemplate, fname, tempfile,
sizeof (tempfile));
mem_free (&fname);
if (entry->command) {
strfcpy (command, entry->command, sizeof (command));
/* rfc1524_expand_command returns 0 if the file is required */
piped =
rfc1524_expand_command (a, tempfile, type, command, sizeof (command));
if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_printf (s, _("[-- Autoview using %s --]\n"), command);
mutt_message (_("Invoking autoview command: %s"), command);
}
if ((fpin = safe_fopen (tempfile, "w+")) == NULL) {
mutt_perror ("fopen");
rfc1524_free_entry (&entry);
return (-1);
}
mutt_copy_bytes (s->fpin, fpin, a->length);
if (!piped) {
safe_fclose (&fpin);
thepid = mutt_create_filter (command, NULL, &fpout, &fperr);
}
else {
unlink (tempfile);
fflush (fpin);
rewind (fpin);
thepid = mutt_create_filter_fd (command, NULL, &fpout, &fperr,
fileno (fpin), -1, -1);
}
if (thepid < 0) {
mutt_perror (_("Can't create filter"));
if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_printf (s, _("[-- Can't run %s. --]\n"), command);
}
rc = -1;
goto bail;
}
if (s->prefix) {
while (fgets (buffer, sizeof (buffer), fpout) != NULL) {
state_puts (s->prefix, s);
state_puts (buffer, s);
}
/* check for data on stderr */
if (fgets (buffer, sizeof (buffer), fperr)) {
if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_printf (s, _("[-- Autoview stderr of %s --]\n"), command);
}
state_puts (s->prefix, s);
state_puts (buffer, s);
while (fgets (buffer, sizeof (buffer), fperr) != NULL) {
state_puts (s->prefix, s);
state_puts (buffer, s);
}
}
}
else {
mutt_copy_stream (fpout, s->fpout);
/* Check for stderr messages */
if (fgets (buffer, sizeof (buffer), fperr)) {
if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_printf (s, _("[-- Autoview stderr of %s --]\n"), command);
}
state_puts (buffer, s);
mutt_copy_stream (fperr, s->fpout);
}
}
bail:
safe_fclose (&fpout);
safe_fclose (&fperr);
mutt_wait_filter (thepid);
if (piped)
safe_fclose (&fpin);
else
mutt_unlink (tempfile);
if (s->flags & M_DISPLAY)
mutt_clear_error ();
}
rfc1524_free_entry (&entry);
return (rc);
}
static int external_body_handler (BODY * b, STATE * s)
{
const char *access_type;
const char *expiration;
time_t expire;
access_type = mutt_get_parameter ("access-type", b->parameter);
if (!access_type) {
if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_puts (_("[-- Error: message/external-body has no access-type parameter --]\n"), s);
}
return (-1);
}
expiration = mutt_get_parameter ("expiration", b->parameter);
if (expiration)
expire = mutt_parse_date (expiration, NULL);
else
expire = -1;
if (!ascii_strcasecmp (access_type, "x-mutt-deleted")) {
if (s->flags & (M_DISPLAY | M_PRINTING)) {
char *length;
char pretty_size[10];
state_mark_attach (s);
state_printf (s, _("[-- This %s/%s attachment "),
TYPE (b->parts), b->parts->subtype);
length = mutt_get_parameter ("length", b->parameter);
if (length) {
mutt_pretty_size (pretty_size, sizeof (pretty_size),
strtol (length, NULL, 10));
state_printf (s, _("(size %s bytes) "), pretty_size);
}
state_puts (_("has been deleted --]\n"), s);
if (expire != -1) {
state_mark_attach (s);
state_printf (s, _("[-- on %s --]\n"), expiration);
}
if (b->parts->filename) {
state_mark_attach (s);
state_printf (s, _("[-- name: %s --]\n"), b->parts->filename);
}
mutt_copy_hdr (s->fpin, s->fpout, ftello (s->fpin), b->parts->offset,
(option (OPTWEED) ? (CH_WEED | CH_REORDER) : 0) |
CH_DECODE, NULL);
}
}
else if (expiration && expire < time (NULL)) {
if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_printf (s, _("[-- This %s/%s attachment is not included, --]\n"),
TYPE (b->parts), b->parts->subtype);
state_attach_puts (_("[-- and the indicated external source has --]\n"
"[-- expired. --]\n"), s);
mutt_copy_hdr (s->fpin, s->fpout, ftello (s->fpin), b->parts->offset,
(option (OPTWEED) ? (CH_WEED | CH_REORDER) : 0) |
CH_DECODE, NULL);
}
}
else {
if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_printf (s,
_("[-- This %s/%s attachment is not included, --]\n"),
TYPE (b->parts), b->parts->subtype);
state_mark_attach (s);
state_printf (s,
_
("[-- and the indicated access-type %s is unsupported --]\n"),
access_type);
mutt_copy_hdr (s->fpin, s->fpout, ftello (s->fpin), b->parts->offset,
(option (OPTWEED) ? (CH_WEED | CH_REORDER) : 0) |
CH_DECODE, NULL);
}
}
return (0);
}
void mutt_decode_attachment (BODY * b, STATE * s)
{
int istext = mutt_is_text_part (b);
iconv_t cd = (iconv_t) (-1);
Quotebuf[0] = '\0';
if (istext) {
if (s->flags & M_CHARCONV) {
char *charset = mutt_get_parameter ("charset", b->parameter);
if (!option (OPTSTRICTMIME) && !charset)
charset = mutt_get_first_charset (AssumedCharset);
if (charset && Charset)
cd = mutt_iconv_open (Charset, charset, M_ICONV_HOOK_FROM);
}
else {
if (b->file_charset)
cd = mutt_iconv_open (Charset, b->file_charset, M_ICONV_HOOK_FROM);
}
}
fseeko (s->fpin, b->offset, 0);
switch (b->encoding) {
case ENCQUOTEDPRINTABLE:
mutt_decode_quoted (s, b->length, istext ||
((WithCrypto & APPLICATION_PGP) &&
mutt_is_application_pgp (b)), cd);
break;
case ENCBASE64:
mutt_decode_base64 (s, b->length, istext ||
((WithCrypto & APPLICATION_PGP) &&
mutt_is_application_pgp (b)), cd);
break;
case ENCUUENCODED:
mutt_decode_uuencoded (s, b->length, istext
|| ((WithCrypto & APPLICATION_PGP) &&
mutt_is_application_pgp (b)), cd);
break;
default:
mutt_decode_xbit (s, b->length, istext
|| ((WithCrypto & APPLICATION_PGP) &&
mutt_is_application_pgp (b)), cd);
break;
}
if (cd != (iconv_t) (-1))
iconv_close (cd);
}
int mutt_body_handler (BODY * b, STATE * s)
{
int decode = 0;
int plaintext = 0;
FILE *fp = NULL;
char tempfile[_POSIX_PATH_MAX];
handler_t handler = NULL;
long tmpoffset = 0;
size_t tmplength = 0;
char type[STRING];
int rc = 0;
int oflags = s->flags;
/* first determine which handler to use to process this part */
snprintf (type, sizeof (type), "%s/%s", TYPE (b), b->subtype);
if (mutt_is_autoview (b, type)) {
rfc1524_entry *entry = rfc1524_new_entry ();
if (rfc1524_mailcap_lookup (b, type, entry, M_AUTOVIEW)) {
handler = autoview_handler;
s->flags &= ~M_CHARCONV;
}
rfc1524_free_entry (&entry);
}
else if (b->type == TYPETEXT) {
if (ascii_strcasecmp ("plain", b->subtype) == 0) {
/* avoid copying this part twice since removing the transfer-encoding is
* the only operation needed.
*/
if ((WithCrypto & APPLICATION_PGP) && mutt_is_application_pgp (b))
handler = crypt_pgp_application_pgp_handler;
else
if (ascii_strcasecmp
("flowed", mutt_get_parameter ("format", b->parameter)) == 0)
handler = rfc3676_handler;
else
plaintext = 1;
}
else if (ascii_strcasecmp ("enriched", b->subtype) == 0)
handler = text_enriched_handler;
else /* text body type without a handler */
plaintext = 1;
}
else if (b->type == TYPEMESSAGE) {
if (mutt_is_message_type (b->type, b->subtype))
handler = message_handler;
else if (!ascii_strcasecmp ("delivery-status", b->subtype))
plaintext = 1;
else if (!ascii_strcasecmp ("external-body", b->subtype))
handler = external_body_handler;
}
else if (b->type == TYPEMULTIPART) {
char *p;
if (ascii_strcasecmp ("alternative", b->subtype) == 0)
handler = alternative_handler;
else if (WithCrypto && ascii_strcasecmp ("signed", b->subtype) == 0) {
p = mutt_get_parameter ("protocol", b->parameter);
if (!p)
mutt_error (_("Error: multipart/signed has no protocol."));
else if (s->flags & M_VERIFY)
handler = mutt_signed_handler;
}
else if ((WithCrypto & APPLICATION_PGP)
&& str_casecmp ("encrypted", b->subtype) == 0) {
p = mutt_get_parameter ("protocol", b->parameter);
if (!p)
mutt_error (_
("Error: multipart/encrypted has no protocol parameter!"));
else if (ascii_strcasecmp ("application/pgp-encrypted", p) == 0)
handler = crypt_pgp_encrypted_handler;
}
if (!handler)
handler = multipart_handler;
}
else if (WithCrypto && b->type == TYPEAPPLICATION) {
if ((WithCrypto & APPLICATION_PGP) && mutt_is_application_pgp (b))
handler = crypt_pgp_application_pgp_handler;
if ((WithCrypto & APPLICATION_SMIME) && mutt_is_application_smime (b))
handler = crypt_smime_application_smime_handler;
}
if (plaintext || handler) {
fseeko (s->fpin, b->offset, 0);
/* see if we need to decode this part before processing it */
if (b->encoding == ENCBASE64 || b->encoding == ENCQUOTEDPRINTABLE || b->encoding == ENCUUENCODED || plaintext || mutt_is_text_part (b)) { /* text subtypes may
* require character
* set conversion even
* with 8bit encoding.
*/
int origType = b->type;
char *savePrefix = NULL;
if (!plaintext) {
/* decode to a tempfile, saving the original destination */
fp = s->fpout;
mutt_mktemp (tempfile);
if ((s->fpout = safe_fopen (tempfile, "w")) == NULL) {
mutt_error _("Unable to open temporary file!");
goto bail;
}
/* decoding the attachment changes the size and offset, so save a copy
* of the "real" values now, and restore them after processing
*/
tmplength = b->length;
tmpoffset = b->offset;
/* if we are decoding binary bodies, we don't want to prefix each
* line with the prefix or else the data will get corrupted.
*/
savePrefix = s->prefix;
s->prefix = NULL;
decode = 1;
}
else
b->type = TYPETEXT;
mutt_decode_attachment (b, s);
if (decode) {
b->length = ftello (s->fpout);
b->offset = 0;
fclose (s->fpout);
/* restore final destination and substitute the tempfile for input */
s->fpout = fp;
fp = s->fpin;
s->fpin = safe_fopen (tempfile, "r");
unlink (tempfile);
/* restore the prefix */
s->prefix = savePrefix;
}
b->type = origType;
}
/* process the (decoded) body part */
if (handler) {
rc = handler (b, s);
if (decode) {
b->length = tmplength;
b->offset = tmpoffset;
/* restore the original source stream */
fclose (s->fpin);
s->fpin = fp;
}
}
s->flags |= M_FIRSTDONE;
}
else if (s->flags & M_DISPLAY) {
state_mark_attach (s);
state_printf (s, _("[-- %s/%s is unsupported "), TYPE (b), b->subtype);
if (!option (OPTVIEWATTACH)) {
if (km_expand_key
(type, sizeof (type),
km_find_func (MENU_PAGER, OP_VIEW_ATTACHMENTS)))
fprintf (s->fpout, _("(use '%s' to view this part)"), type);
else
fputs (_("(need 'view-attachments' bound to key!)"), s->fpout);
}
fputs (" --]\n", s->fpout);
}
bail:
s->flags = oflags | (s->flags & M_FIRSTDONE);
return (rc);
}
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