-/*
- * mhfixmsg.c -- rewrite a message with various tranformations
+/* mhfixmsg.c -- rewrite a message with various transformations
*
* This code is Copyright (c) 2002 and 2013, by the authors of nmh.
* See the COPYRIGHT file in the root directory of the nmh
* distribution for complete copyright information.
*/
-#include <h/mh.h>
-#include <h/mime.h>
-#include <h/mhparse.h>
-#include <h/utils.h>
-#include <h/signals.h>
+#include "h/mh.h"
+#include "sbr/m_name.h"
+#include "sbr/m_gmprot.h"
+#include "sbr/m_getfld.h"
+#include "sbr/getarguments.h"
+#include "sbr/concat.h"
+#include "sbr/seq_setprev.h"
+#include "sbr/seq_setcur.h"
+#include "sbr/seq_save.h"
+#include "sbr/smatch.h"
+#include "sbr/fmt_rfc2047.h"
+#include "sbr/cpydata.h"
+#include "sbr/trimcpy.h"
+#include "sbr/m_convert.h"
+#include "sbr/m_backup.h"
+#include "sbr/getfolder.h"
+#include "sbr/folder_read.h"
+#include "sbr/context_save.h"
+#include "sbr/context_replace.h"
+#include "sbr/context_find.h"
+#include "sbr/readconfig.h"
+#include "sbr/ambigsw.h"
+#include "sbr/path.h"
+#include "sbr/print_version.h"
+#include "sbr/print_help.h"
+#include "sbr/error.h"
+#include "h/fmt_scan.h"
+#include "h/mime.h"
+#include "h/mhparse.h"
+#include "h/done.h"
+#include "h/utils.h"
+#include "h/signals.h"
+#include "sbr/m_maildir.h"
+#include "sbr/m_mktemp.h"
+#include "sbr/mime_type.h"
+#include "mhmisc.h"
+#include "mhfree.h"
+#include "mhoutsbr.h"
+#include "mhshowsbr.h"
#include <fcntl.h>
#define MHFIXMSG_SWITCHES \
- X("decodetext 8bit|7bit", 0, DECODETEXTSW) \
+ X("decodetext 8bit|7bit|binary", 0, DECODETEXTSW) \
X("nodecodetext", 0, NDECODETEXTSW) \
+ X("decodetypes", 0, DECODETYPESW) \
+ X("decodeheaderfieldbodies utf-8", 0, DECODEHEADERFIELDBODIESSW) \
+ X("nodecodeheaderfieldbodies", 0, NDECODEHEADERFIELDBODIESSW) \
+ X("crlflinebreaks", 0, CRLFLINEBREAKSSW) \
+ X("nocrlflinebreaks", 0, NCRLFLINEBREAKSSW) \
X("textcharset", 0, TEXTCHARSETSW) \
X("notextcharset", 0, NTEXTCHARSETSW) \
X("reformat", 0, REFORMATSW) \
X("noreplacetextplain", 0, NREPLACETEXTPLAINSW) \
X("fixboundary", 0, FIXBOUNDARYSW) \
X("nofixboundary", 0, NFIXBOUNDARYSW) \
- X("fixcte", 0, FIXCTESW) \
- X("nofixcte", 0, NFIXCTESW) \
+ X("fixcte", 0, FIXCOMPOSITECTESW) \
+ X("nofixcte", 0, NFIXCOMPOSITECTESW) \
+ X("checkbase64", 0, CHECKBASE64SW) \
+ X("nocheckbase64", 0, NCHECKBASE64SW) \
+ X("fixtype mimetype", 0, FIXTYPESW) \
X("file file", 0, FILESW) \
X("outfile file", 0, OUTFILESW) \
X("rmmproc program", 0, RPROCSW) \
#define quitser pipeser
-/* mhparse.c */
-extern int skip_mp_cte_check; /* flag to InitMultiPart */
-extern int suppress_bogus_mp_content_warning; /* flag to InitMultiPart */
-extern int bogus_mp_content; /* flag from InitMultiPart */
-/* flags to/from parse_header_attrs */
-extern int suppress_extraneous_trailing_semicolon_warning;
-extern int extraneous_trailing_semicolon;
-
-/* mhoutsbr.c */
-int output_message (CT, char *);
-
-/* mhmisc.c */
-void flush_errors (void);
-
-/* mhfree.c */
-extern CT *cts;
-void freects_done (int) NORETURN;
-
/*
* static prototypes
*/
-typedef struct fix_transformations {
+typedef struct {
int fixboundary;
- int fixcte;
+ int fixcompositecte;
+ svector_t fixtypes;
int reformat;
int replacetextplain;
int decodetext;
+ char *decodetypes;
+ char *decodeheaderfieldbodies; /* Either NULL or "utf-8". */
+ /* Whether to use CRLF linebreaks, per RFC 2046 Sec. 4.1.1, par.1. */
+ int lf_line_endings;
char *textcharset;
+ bool checkbase64;
} fix_transformations;
-int mhfixmsgsbr (CT *, const fix_transformations *, char *);
+static int mhfixmsgsbr (CT *, char *, const fix_transformations *,
+ FILE **, char *, FILE **);
static int fix_boundary (CT *, int *);
+static int copy_input_to_output (const char *, FILE *, const char *, FILE *);
static int get_multipart_boundary (CT, char **);
static int replace_boundary (CT, char *, char *);
-static int fix_multipart_cte (CT, int *);
+static int fix_types (CT, svector_t, int *);
+static char *replace_substring (char **, const char *, const char *);
+static char *remove_parameter (char *, const char *);
+static int fix_composite_cte (CT, int *);
static int set_ce (CT, int);
static int ensure_text_plain (CT *, CT, int *, int);
static int find_textplain_sibling (CT, int, int *);
static int insert_new_text_plain_part (CT, int, CT);
static CT build_text_plain_part (CT);
+static int insert_into_new_mp_alt (CT *, int *);
+static int insert_into_new_mp_mixed (CT *, const char *, int *);
static CT divide_part (CT);
static void copy_ctinfo (CI, CI);
static int decode_part (CT);
+static size_t get_valid_base64 (CT, char **);
+static size_t find_invalid_base64_pos (const char *);
+static int check_base64_encoding (CT *);
static int reformat_part (CT, char *, char *, char *, int);
-static int charset_encoding (CT);
-static CT build_multipart_alt (CT, CT, int, int);
+static CT build_multipart (CT, CT, int, int);
static int boundary_in_content (FILE **, char *, const char *);
static void transfer_noncontent_headers (CT, CT);
static int set_ct_type (CT, int type, int subtype, int encoding);
-static int decode_text_parts (CT, int, int *);
+static int decode_text_parts (CT, int, const char *, int *);
+static int should_decode(const char *, const char *, const char *);
static int content_encoding (CT, const char **);
static int strip_crs (CT, int *);
+static void update_cte (CT);
+static int least_restrictive_encoding (CT) PURE;
+static int less_restrictive (int, int);
static int convert_charsets (CT, char *, int *);
-static int fix_always (CT, int *);
-static int write_content (CT, char *, char *, int, int);
-static int remove_file (char *);
-static void report (char *, char *, char *, char *, ...);
+static int fix_always (CT *, const fix_transformations *, int *);
+static int decode_header_field_bodies (CT, int *);
+static int fix_filename_param (char *, char *, PM *, PM *);
+static int fix_filename_encoding (CT);
+static int write_content (CT, const char *, char *, FILE *, int, int);
+static void set_text_ctparams(CT, char *, int);
+static int remove_file (const char *);
+static void report (char *, char *, char *, char *, ...)
+ CHECK_PRINTF(4, 5);
static void pipeser (int);
int
-main (int argc, char **argv) {
+main (int argc, char **argv)
+{
int msgnum;
char *cp, *file = NULL, *folder = NULL;
- char *maildir, buf[100], *outfile = NULL;
+ char *maildir = NULL, buf[100], *outfile = NULL;
char **argp, **arguments;
struct msgs_array msgs = { 0, 0, NULL };
struct msgs *mp = NULL;
CT *ctp;
- FILE *fp;
- int using_stdin = 0;
- int chgflag = 1;
+ FILE *fp, *infp = NULL, *outfp = NULL;
+ bool using_stdin = false;
+ bool chgflag = true;
int status = OK;
fix_transformations fx;
- fx.reformat = fx.fixcte = fx.fixboundary = 1;
+ fx.reformat = fx.fixcompositecte = fx.fixboundary = 1;
+ fx.fixtypes = NULL;
fx.replacetextplain = 0;
fx.decodetext = CE_8BIT;
+ fx.decodetypes = "text,application/ics"; /* Default, per man page. */
+ fx.decodeheaderfieldbodies = NULL;
+ fx.lf_line_endings = 0;
fx.textcharset = NULL;
+ fx.checkbase64 = true;
- if (nmh_init(argv[0], 1)) { return 1; }
-
- done = freects_done;
+ if (nmh_init(argv[0], true, false)) { return 1; }
arguments = getarguments (invo_name, argc, argv, 1);
argp = arguments;
ambigsw (cp, switches);
done (1);
case UNKWNSW:
- adios (NULL, "-%s unknown", cp);
+ die("-%s unknown", cp);
case HELPSW:
snprintf (buf, sizeof buf, "%s [+folder] [msgs] [switches]",
done (0);
case DECODETEXTSW:
- if (! (cp = *argp++) || *cp == '-')
- adios (NULL, "missing argument to %s", argp[-2]);
+ if (! (cp = *argp++) || *cp == '-') {
+ die("missing argument to %s", argp[-2]);
+ }
if (! strcasecmp (cp, "8bit")) {
fx.decodetext = CE_8BIT;
} else if (! strcasecmp (cp, "7bit")) {
fx.decodetext = CE_7BIT;
+ } else if (! strcasecmp (cp, "binary")) {
+ fx.decodetext = CE_BINARY;
} else {
- adios (NULL, "invalid argument to %s", argp[-2]);
+ die("invalid argument to %s", argp[-2]);
}
continue;
case NDECODETEXTSW:
fx.decodetext = 0;
continue;
+ case DECODETYPESW:
+ if (! (cp = *argp++) || *cp == '-') {
+ die("missing argument to %s", argp[-2]);
+ }
+ fx.decodetypes = cp;
+ continue;
+ case DECODEHEADERFIELDBODIESSW:
+ if (! (cp = *argp++) || *cp == '-') {
+ die("missing argument to %s", argp[-2]);
+ }
+ fx.decodeheaderfieldbodies = cp;
+ if (strcasecmp (cp, "utf-8") && strcasecmp (cp, "utf8")) {
+ /* Because UTF-8 strings can't have embedded nulls. Other
+ encodings support that, too, but we won't bother to
+ enumerate them. */
+ die("-decodeheaderfieldbodies only supports utf-8");
+ }
+ continue;
+ case NDECODEHEADERFIELDBODIESSW:
+ fx.decodeheaderfieldbodies = NULL;
+ continue;
+ case CRLFLINEBREAKSSW:
+ fx.lf_line_endings = 0;
+ continue;
+ case NCRLFLINEBREAKSSW:
+ fx.lf_line_endings = 1;
+ continue;
case TEXTCHARSETSW:
- if (! (cp = *argp++) || (*cp == '-' && cp[1]))
- adios (NULL, "missing argument to %s", argp[-2]);
+ if (! (cp = *argp++) || (*cp == '-' && cp[1])) {
+ die("missing argument to %s", argp[-2]);
+ }
fx.textcharset = cp;
continue;
case NTEXTCHARSETSW:
fx.textcharset = 0;
continue;
+ case CHECKBASE64SW:
+ fx.checkbase64 = true;
+ continue;
+ case NCHECKBASE64SW:
+ fx.checkbase64 = false;
+ continue;
case FIXBOUNDARYSW:
fx.fixboundary = 1;
continue;
case NFIXBOUNDARYSW:
fx.fixboundary = 0;
continue;
- case FIXCTESW:
- fx.fixcte = 1;
+ case FIXCOMPOSITECTESW:
+ fx.fixcompositecte = 1;
+ continue;
+ case NFIXCOMPOSITECTESW:
+ fx.fixcompositecte = 0;
continue;
- case NFIXCTESW:
- fx.fixcte = 0;
+ case FIXTYPESW:
+ if (! (cp = *argp++) || (*cp == '-' && cp[1])) {
+ die("missing argument to %s", argp[-2]);
+ }
+ if (! strncasecmp (cp, "multipart/", 10) ||
+ ! strncasecmp (cp, "message/", 8))
+ die("-fixtype %s not allowed", cp);
+ if (! strchr (cp, '/'))
+ die("-fixtype requires type/subtype");
+ if (fx.fixtypes == NULL) { fx.fixtypes = svector_create (10); }
+ svector_push_back (fx.fixtypes, cp);
continue;
case REFORMATSW:
fx.reformat = 1;
fx.replacetextplain = 0;
continue;
case FILESW:
- if (! (cp = *argp++) || (*cp == '-' && cp[1]))
- adios (NULL, "missing argument to %s", argp[-2]);
- file = *cp == '-' ? add (cp, NULL) : path (cp, TFILE);
+ if (! (cp = *argp++) || (*cp == '-' && cp[1])) {
+ die("missing argument to %s", argp[-2]);
+ }
+ file = *cp == '-' ? mh_xstrdup (cp) : path (cp, TFILE);
continue;
case OUTFILESW:
- if (! (cp = *argp++) || (*cp == '-' && cp[1]))
- adios (NULL, "missing argument to %s", argp[-2]);
- outfile = *cp == '-' ? add (cp, NULL) : path (cp, TFILE);
+ if (! (cp = *argp++) || (*cp == '-' && cp[1])) {
+ die("missing argument to %s", argp[-2]);
+ }
+ outfile = *cp == '-' ? mh_xstrdup (cp) : path (cp, TFILE);
continue;
case RPROCSW:
- if (!(rmmproc = *argp++) || *rmmproc == '-')
- adios (NULL, "missing argument to %s", argp[-2]);
+ if (!(rmmproc = *argp++) || *rmmproc == '-') {
+ die("missing argument to %s", argp[-2]);
+ }
continue;
case NRPRCSW:
rmmproc = NULL;
continue;
case CHGSW:
- chgflag = 1;
+ chgflag = true;
continue;
case NCHGSW:
- chgflag = 0;
+ chgflag = false;
continue;
case VERBSW:
verbosw = 1;
}
if (*cp == '+' || *cp == '@') {
if (folder)
- adios (NULL, "only one folder at a time!");
- else
- folder = pluspath (cp);
+ die("only one folder at a time!");
+ folder = pluspath (cp);
} else {
if (*cp == '/') {
/* Interpret a full path as a filename, not a message. */
- file = add (cp, NULL);
+ file = mh_xstrdup (cp);
} else {
app_msgarg (&msgs, cp);
}
* Read the standard profile setup
*/
if ((fp = fopen (cp = etcpath ("mhn.defaults"), "r"))) {
- readconfig ((struct node **) 0, fp, cp, 0);
+ readconfig(NULL, fp, cp, 0);
fclose (fp);
}
- suppress_bogus_mp_content_warning = skip_mp_cte_check = 1;
- suppress_extraneous_trailing_semicolon_warning = 1;
+ suppress_bogus_mp_content_warning = skip_mp_cte_check = true;
+ suppress_extraneous_trailing_semicolon_warning = true;
- if (! context_find ("path"))
+ if (! context_find ("path")) {
free (path ("./", TFOLDER));
+ }
+
+ if (file && msgs.size) {
+ die("cannot specify msg and file at same time!");
+ }
- if (file && msgs.size)
- adios (NULL, "cannot specify msg and file at same time!");
+ if (outfile) {
+ /* Open the outfile now, so we don't have to risk opening it
+ after running out of fds. */
+ if (strcmp (outfile, "-") == 0) {
+ outfp = stdout;
+ } else if ((outfp = fopen (outfile, "w")) == NULL) {
+ adios (outfile, "unable to open for writing");
+ }
+ }
/*
* check if message is coming from file
int fd;
char *cp;
- using_stdin = 1;
+ using_stdin = true;
if ((cp = m_mktemp2 (NULL, invo_name, &fd, NULL)) == NULL) {
- adios (NULL, "unable to create temporary file in %s",
+ die("unable to create temporary file in %s",
get_temp_dir());
} else {
free (file);
- file = add (cp, NULL);
+ file = mh_xstrdup (cp);
cpydata (STDIN_FILENO, fd, "-", file);
}
if (close (fd)) {
(void) m_unlink (file);
- adios (NULL, "failed to write temporary file");
+ die("failed to write temporary file");
}
}
- if (! (cts = (CT *) mh_xcalloc ((size_t) 2, sizeof *cts))) {
- adios (NULL, "out of memory");
- }
+ cts = mh_xcalloc(2, sizeof *cts);
ctp = cts;
- if ((ct = parse_mime (file))) { *ctp++ = ct; }
+ if ((ct = parse_mime (file))) {
+ set_text_ctparams(ct, fx.decodetypes, fx.lf_line_endings);
+ *ctp++ = ct;
+ } else {
+ inform("unable to parse message from file %s", file);
+ status = NOTOK;
+
+ /* If there's an outfile, pass the input message unchanged, so the
+ message won't get dropped from a pipeline. */
+ if (outfile) {
+ /* Something went wrong. Output might be expected, such as if
+ this were run as a filter. Just copy the input to the
+ output. */
+ if ((infp = fopen (file, "r")) == NULL) {
+ adios (file, "unable to open for reading");
+ }
+
+ if (copy_input_to_output (file, infp, outfile, outfp) != OK) {
+ inform("unable to copy message to %s, "
+ "it might be lost\n", outfile);
+ }
+
+ fclose (infp);
+ infp = NULL;
+ }
+ }
} else {
/*
* message(s) are coming from a folder
*/
CT ct;
- if (! msgs.size)
+ if (! msgs.size) {
app_msgarg(&msgs, "cur");
- if (! folder)
+ }
+ if (! folder) {
folder = getfolder (1);
- maildir = m_maildir (folder);
+ }
+ maildir = mh_xstrdup(m_maildir (folder));
- if (chdir (maildir) == NOTOK)
+ /* chdir so that error messages, esp. from MIME parser, just
+ refer to the message and not its path. */
+ if (chdir (maildir) == NOTOK) {
adios (maildir, "unable to change directory to");
+ }
/* read folder and create message structure */
- if (! (mp = folder_read (folder, 1)))
- adios (NULL, "unable to read folder %s", folder);
+ if (! (mp = folder_read (folder, 1))) {
+ die("unable to read folder %s", folder);
+ }
/* check for empty folder */
- if (mp->nummsg == 0)
- adios (NULL, "no messages in %s", folder);
+ if (mp->nummsg == 0) {
+ die("no messages in %s", folder);
+ }
/* parse all the message ranges/sequences and set SELECTED */
for (msgnum = 0; msgnum < msgs.size; msgnum++)
- if (! m_convert (mp, msgs.msgs[msgnum]))
+ if (! m_convert (mp, msgs.msgs[msgnum])) {
done (1);
+ }
seq_setprev (mp); /* set the previous-sequence */
- if (! (cts =
- (CT *) mh_xcalloc ((size_t) (mp->numsel + 1), sizeof *cts))) {
- adios (NULL, "out of memory");
- }
+ cts = mh_xcalloc(mp->numsel + 1, sizeof *cts);
ctp = cts;
for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
if (is_selected(mp, msgnum)) {
- char *msgnam;
+ char *msgnam = m_name (msgnum);
+
+ if ((ct = parse_mime (msgnam))) {
+ set_text_ctparams(ct, fx.decodetypes, fx.lf_line_endings);
+ *ctp++ = ct;
+ } else {
+ inform("unable to parse message %s", msgnam);
+ status = NOTOK;
+
+ /* If there's an outfile, pass the input message
+ unchanged, so the message won't get dropped from a
+ pipeline. */
+ if (outfile) {
+ /* Something went wrong. Output might be expected,
+ such as if this were run as a filter. Just copy
+ the input to the output. */
+ /* Can't use path() here because 1) it might have been
+ called before and it caches the pwd, and 2) we call
+ chdir() after that. */
+ char *input_filename =
+ concat (maildir, "/", msgnam, NULL);
+
+ if ((infp = fopen (input_filename, "r")) == NULL) {
+ adios (input_filename,
+ "unable to open for reading");
+ }
+
+ if (copy_input_to_output (input_filename, infp,
+ outfile, outfp) != OK) {
+ inform("unable to copy message to %s, "
+ "it might be lost\n", outfile);
+ }
- msgnam = m_name (msgnum);
- if ((ct = parse_mime (msgnam))) { *ctp++ = ct; }
+ fclose (infp);
+ infp = NULL;
+ free (input_filename);
+ }
+ }
}
}
if (*cts) {
for (ctp = cts; *ctp; ++ctp) {
- status += mhfixmsgsbr (ctp, &fx, outfile);
+ status =
+ mhfixmsgsbr (ctp, maildir, &fx, &infp, outfile, &outfp) == OK
+ ? 0
+ : 1;
+ free_content (*ctp);
if (using_stdin) {
(void) m_unlink (file);
status = 1;
}
+ free(maildir);
+ free (cts);
+
+ if (fx.fixtypes != NULL) { svector_free (fx.fixtypes); }
+ if (infp) { fclose (infp); } /* even if stdin */
+ if (outfp) { fclose (outfp); } /* even if stdout */
free (outfile);
free (file);
+ free (folder);
+ free (arguments);
- /* done is freects_done, which will clean up all of cts. */
- done (status);
+ done (status == OK ? 0 : 1);
return NOTOK;
}
-int
-mhfixmsgsbr (CT *ctp, const fix_transformations *fx, char *outfile) {
+/*
+ * Apply transformations to one message.
+ */
+static int
+mhfixmsgsbr (CT *ctp, char *maildir, const fix_transformations *fx,
+ FILE **infp, char *outfile, FILE **outfp)
+{
/* Store input filename in case one of the transformations, i.e.,
fix_boundary(), rewrites to a tmp file. */
- char *input_filename = add ((*ctp)->c_file, NULL);
- int modify_inplace = 0;
+ char *input_filename = maildir
+ ? concat (maildir, "/", (*ctp)->c_file, NULL)
+ : mh_xstrdup ((*ctp)->c_file);
+ bool modify_inplace = false;
int message_mods = 0;
int status = OK;
+ /* Though the input file won't need to be opened if everything goes
+ well, do it here just in case there's a failure, and that failure is
+ running out of file descriptors. */
+ if ((*infp = fopen (input_filename, "r")) == NULL) {
+ adios (input_filename, "unable to open for reading");
+ }
+
if (outfile == NULL) {
- modify_inplace = 1;
+ modify_inplace = true;
if ((*ctp)->c_file) {
char *tempfile;
- if ((tempfile = m_mktemp2 (NULL, invo_name, NULL, NULL)) == NULL) {
- adios (NULL, "unable to create temporary file in %s",
+ /* outfp will be closed by the caller */
+ if ((tempfile = m_mktemp2 (NULL, invo_name, NULL, outfp)) ==
+ NULL) {
+ die("unable to create temporary file in %s",
get_temp_dir());
}
- outfile = add (tempfile, NULL);
+ outfile = mh_xstrdup (tempfile);
} else {
- adios (NULL, "missing both input and output filenames\n");
+ die("missing both input and output filenames\n");
}
- }
+ } /* else *outfp was defined by caller */
reverse_alternative_parts (*ctp);
- status = fix_always (*ctp, &message_mods);
+ status = fix_always (ctp, fx, &message_mods);
if (status == OK && fx->fixboundary) {
status = fix_boundary (ctp, &message_mods);
}
- if (status == OK && fx->fixcte) {
- status = fix_multipart_cte (*ctp, &message_mods);
+ if (status == OK && fx->fixtypes != NULL) {
+ status = fix_types (*ctp, fx->fixtypes, &message_mods);
+ }
+ if (status == OK && fx->fixcompositecte) {
+ status = fix_composite_cte (*ctp, &message_mods);
}
if (status == OK && fx->reformat) {
status =
ensure_text_plain (ctp, NULL, &message_mods, fx->replacetextplain);
}
if (status == OK && fx->decodetext) {
- status = decode_text_parts (*ctp, fx->decodetext, &message_mods);
+ status = decode_text_parts (*ctp, fx->decodetext, fx->decodetypes,
+ &message_mods);
+ update_cte (*ctp);
+ }
+ if (status == OK && fx->decodeheaderfieldbodies) {
+ status = decode_header_field_bodies(*ctp, &message_mods);
}
if (status == OK && fx->textcharset != NULL) {
status = convert_charsets (*ctp, fx->textcharset, &message_mods);
* Write the content to a file
*/
if (status == OK) {
- status = write_content (*ctp, input_filename, outfile, modify_inplace,
- message_mods);
+ status = write_content (*ctp, input_filename, outfile, *outfp,
+ modify_inplace, message_mods);
} else if (! modify_inplace) {
/* Something went wrong. Output might be expected, such
as if this were run as a filter. Just copy the input
to the output. */
- int in = open (input_filename, O_RDONLY);
- int out = strcmp (outfile, "-")
- ? open (outfile, O_WRONLY | O_CREAT, m_gmprot ())
- : STDOUT_FILENO;
-
- if (in != -1 && out != -1) {
- cpydata (in, out, input_filename, outfile);
- } else {
- status = NOTOK;
+ if (copy_input_to_output (input_filename, *infp, outfile,
+ *outfp) != OK) {
+ inform("unable to copy message to %s, it might be lost\n",
+ outfile);
}
-
- close (out);
- close (in);
}
if (modify_inplace) {
outfile = NULL;
}
+ fclose (*infp);
+ *infp = NULL;
free (input_filename);
return status;
}
+/*
+ * Copy input message to output. Assumes not modifying in place, so this
+ * might be running as part of a pipeline.
+ */
+static int
+copy_input_to_output (const char *input_filename, FILE *infp,
+ const char *output_filename, FILE *outfp)
+{
+ int in = fileno (infp);
+ int out = fileno (outfp);
+ int status = OK;
+
+ if (in != -1 && out != -1) {
+ cpydata (in, out, input_filename, output_filename);
+ } else {
+ status = NOTOK;
+ }
+
+ return status;
+}
+
+
+/*
+ * Fix mismatched outer level boundary.
+ */
static int
-fix_boundary (CT *ct, int *message_mods) {
+fix_boundary (CT *ct, int *message_mods)
+{
struct multipart *mp;
int status = OK;
if ((fixed = m_mktemp2 (NULL, invo_name, NULL, &(*ct)->c_fp))) {
if (replace_boundary (*ct, fixed, part_boundary) == OK) {
- char *filename = add ((*ct)->c_file, NULL);
+ char *filename = mh_xstrdup ((*ct)->c_file);
CT fixed_ct;
free_content (*ct);
}
} else {
*ct = NULL;
- advise (NULL, "unable to parse fixed part");
+ inform("unable to parse fixed part");
status = NOTOK;
}
free (filename);
} else {
- advise (NULL, "unable to replace broken boundary");
+ inform("unable to replace broken boundary");
status = NOTOK;
}
} else {
- advise (NULL, "unable to create temporary file in %s",
+ inform("unable to create temporary file in %s",
get_temp_dir());
status = NOTOK;
}
free (part_boundary);
+ } else {
+ /* Couldn't fix the boundary. Report failure so that mhfixmsg
+ doesn't modify the message. */
+ status = NOTOK;
}
+ } else {
+ /* No multipart struct, even though the content type is
+ CT_MULTIPART. Report failure so that mhfixmsg doesn't modify
+ the message. */
+ status = NOTOK;
}
}
}
+/*
+ * Find boundary at end of multipart.
+ */
static int
-get_multipart_boundary (CT ct, char **part_boundary) {
- char buffer[BUFSIZ];
+get_multipart_boundary (CT ct, char **part_boundary)
+{
+ char buffer[NMH_BUFSIZ];
char *end_boundary = NULL;
off_t begin = (off_t) ct->c_end > (off_t) (ct->c_begin + sizeof buffer)
? (off_t) (ct->c_end - sizeof buffer)
size_t bytes_read;
int status = OK;
- /* This will fail if the boundary spans fread() calls. BUFSIZ should
+ /* This will fail if the boundary spans fread() calls. NMH_BUFSIZ should
be big enough, even if it's just 1024, to make that unlikely. */
- /* free_content() will close ct->c_fp. */
+ /* free_content() will close ct->c_fp if bogus MP boundary is fixed. */
if (! ct->c_fp && (ct->c_fp = fopen (ct->c_file, "r")) == NULL) {
advise (ct->c_file, "unable to open for reading");
return NOTOK;
if ((end = rfind_str (buffer, cp - buffer, "\n"))) {
if (strlen (end) > 3 && *end++ == '\n' &&
*end++ == '-' && *end++ == '-') {
- end_boundary = add (end, NULL);
+ end_boundary = mh_xstrdup (end);
break;
}
}
}
}
- if (! end_boundary && begin > (off_t) (ct->c_begin + sizeof buffer)) {
- begin -= sizeof buffer;
- } else {
+ if (end_boundary || begin <= (off_t) (ct->c_begin + sizeof buffer))
break;
- }
+ begin -= sizeof buffer;
}
/* Get boundary at beginning of multipart. */
status = NOTOK;
}
+ if (ct->c_fp) {
+ fclose (ct->c_fp);
+ ct->c_fp = NULL;
+ }
+
if (status == OK) {
*part_boundary = end_boundary;
} else {
}
-/* Open and copy ct->c_file to file, replacing the multipart boundary. */
+/*
+ * Open and copy ct->c_file to file, replacing the multipart boundary.
+ */
static int
-replace_boundary (CT ct, char *file, char *boundary) {
+replace_boundary (CT ct, char *file, char *boundary)
+{
FILE *fpin, *fpout;
int compnum, state;
- char buf[BUFSIZ], name[NAMESZ];
+ char buf[NMH_BUFSIZ], name[NAMESZ];
char *np, *vp;
- m_getfld_state_t gstate = 0;
+ m_getfld_state_t gstate;
int status = OK;
if (ct->c_file == NULL) {
- advise (NULL, "missing input filename");
+ inform("missing input filename");
return NOTOK;
}
return NOTOK;
}
+ gstate = m_getfld_state_init(fpin);
for (compnum = 1;;) {
int bufsz = (int) sizeof buf;
- switch (state = m_getfld (&gstate, name, buf, &bufsz, fpin)) {
+ switch (state = m_getfld2(&gstate, name, buf, &bufsz)) {
case FLD:
case FLDPLUS:
compnum++;
/* get copies of the buffers */
- np = add (name, NULL);
- vp = add (buf, NULL);
+ np = mh_xstrdup (name);
+ vp = mh_xstrdup (buf);
/* if necessary, get rest of field */
while (state == FLDPLUS) {
bufsz = sizeof buf;
- state = m_getfld (&gstate, name, buf, &bufsz, fpin);
+ state = m_getfld2(&gstate, name, buf, &bufsz);
vp = add (buf, vp); /* add to previous value */
}
if (strcasecmp (TYPE_FIELD, np)) {
fprintf (fpout, "%s:%s", np, vp);
} else {
- char *new_ctline, *new_params;
+ char *new_ctline, *new_params;
- replace_param(&ct->c_ctinfo.ci_first_pm,
- &ct->c_ctinfo.ci_last_pm, "boundary",
- boundary, 0);
+ replace_param(&ct->c_ctinfo.ci_first_pm,
+ &ct->c_ctinfo.ci_last_pm, "boundary",
+ boundary, 0);
- new_ctline = concat(" ", ct->c_ctinfo.ci_type, "/",
- ct->c_ctinfo.ci_subtype, NULL);
- new_params = output_params(strlen(TYPE_FIELD) +
- strlen(new_ctline) + 1,
- ct->c_ctinfo.ci_first_pm, NULL, 0);
+ new_ctline = concat(" ", ct->c_ctinfo.ci_type, "/",
+ ct->c_ctinfo.ci_subtype, NULL);
+ new_params = output_params(LEN(TYPE_FIELD) +
+ strlen(new_ctline) + 1,
+ ct->c_ctinfo.ci_first_pm, NULL, 0);
fprintf (fpout, "%s:%s%s\n", np, new_ctline,
- new_params ? new_params : "");
- free(new_ctline);
- if (new_params)
- free(new_params);
+ FENDNULL(new_params));
+ free(new_ctline);
+ free(new_params);
}
free (vp);
continue;
case BODY:
- fputs ("\n", fpout);
+ putc('\n', fpout);
/* buf will have a terminating NULL, skip it. */
if ((int) fwrite (buf, 1, bufsz-1, fpout) < bufsz-1) {
advise (file, "fwrite");
case LENERR:
case FMTERR:
- advise (NULL, "message format error in component #%d", compnum);
+ inform("message format error in component #%d", compnum);
status = NOTOK;
break;
default:
- advise (NULL, "getfld() returned %d", state);
+ inform("getfld() returned %d", state);
status = NOTOK;
break;
}
}
+/*
+ * Fix Content-Type header to reflect the content of its part.
+ */
static int
-fix_multipart_cte (CT ct, int *message_mods) {
+fix_types (CT ct, svector_t fixtypes, int *message_mods)
+{
int status = OK;
- if (ct->c_type == CT_MULTIPART) {
- struct multipart *m;
+ switch (ct->c_type) {
+ case CT_MULTIPART: {
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
struct part *part;
+ for (part = m->mp_parts; status == OK && part; part = part->mp_next) {
+ status = fix_types (part->mp_part, fixtypes, message_mods);
+ }
+ break;
+ }
+
+ case CT_MESSAGE:
+ if (ct->c_subtype == MESSAGE_EXTERNAL) {
+ struct exbody *e = (struct exbody *) ct->c_ctparams;
+
+ status = fix_types (e->eb_content, fixtypes, message_mods);
+ }
+ break;
+
+ default: {
+ char **typep, *type;
+
+ if (ct->c_ctinfo.ci_type && ct->c_ctinfo.ci_subtype) {
+ for (typep = svector_strs (fixtypes);
+ typep && (type = *typep);
+ ++typep) {
+ char *type_subtype =
+ concat (ct->c_ctinfo.ci_type, "/", ct->c_ctinfo.ci_subtype,
+ NULL);
+
+ if (! strcasecmp (type, type_subtype) &&
+ decode_part (ct) == OK &&
+ ct->c_cefile.ce_file != NULL) {
+ char *ct_type_subtype = mime_type (ct->c_cefile.ce_file);
+ char *cp;
+
+ if ((cp = strchr (ct_type_subtype, ';'))) {
+ /* Truncate to remove any parameter list from
+ mime_type () result. */
+ *cp = '\0';
+ }
+
+ if (strcasecmp (type, ct_type_subtype)) {
+ char *ct_type, *ct_subtype;
+ HF hf;
+
+ /* The Content-Type header does not match the
+ content, so update these struct Content
+ fields to match:
+ * c_type, c_subtype
+ * c_ctinfo.ci_type, c_ctinfo.ci_subtype
+ * c_ctline
+ */
+ /* Extract type and subtype from type/subtype. */
+ ct_type = mh_xstrdup(ct_type_subtype);
+ if ((cp = strchr (ct_type, '/'))) {
+ *cp = '\0';
+ ct_subtype = mh_xstrdup(++cp);
+ } else {
+ inform("missing / in MIME type of %s %s",
+ ct->c_file, ct->c_partno);
+ free (ct_type);
+ return NOTOK;
+ }
+
+ ct->c_type = ct_str_type (ct_type);
+ ct->c_subtype = ct_str_subtype (ct->c_type, ct_subtype);
+
+ free (ct->c_ctinfo.ci_type);
+ ct->c_ctinfo.ci_type = ct_type;
+ free (ct->c_ctinfo.ci_subtype);
+ ct->c_ctinfo.ci_subtype = ct_subtype;
+ if (! replace_substring (&ct->c_ctline, type,
+ ct_type_subtype)) {
+ inform("did not find %s in %s",
+ type, ct->c_ctline);
+ }
+
+ /* Update Content-Type header field. */
+ for (hf = ct->c_first_hf; hf; hf = hf->next) {
+ if (! strcasecmp (TYPE_FIELD, hf->name)) {
+ if (replace_substring (&hf->value, type,
+ ct_type_subtype)) {
+ ++*message_mods;
+ if (verbosw) {
+ report (NULL, ct->c_partno, ct->c_file,
+ "change Content-Type in header "
+ "from %s to %s",
+ type, ct_type_subtype);
+ }
+ break;
+ }
+ inform("did not find %s in %s", type, hf->value);
+ }
+ }
+ }
+ free (ct_type_subtype);
+ }
+ free (type_subtype);
+ }
+ }
+ }}
+
+ return status;
+}
+
+
+/*
+ * Replace a substring, allocating space to hold the new one.
+ */
+char *
+replace_substring (char **str, const char *old, const char *new)
+{
+ char *cp;
+
+ if ((cp = strstr (*str, old))) {
+ char *remainder = cp + strlen (old);
+ char *prefix, *new_str;
+
+ if (cp - *str) {
+ prefix = mh_xstrdup(*str);
+ *(prefix + (cp - *str)) = '\0';
+ new_str = concat (prefix, new, remainder, NULL);
+ free (prefix);
+ } else {
+ new_str = concat (new, remainder, NULL);
+ }
+
+ free (*str);
+
+ return *str = new_str;
+ }
+
+ return NULL;
+}
+
+
+/*
+ * Remove a name=value parameter, given just its name, from a header value.
+ */
+char *
+remove_parameter (char *str, const char *name)
+{
+ /* It looks to me, based on the BNF in RFC 2045, than there can't
+ be whitespace between the parameter name and the "=", or
+ between the "=" and the parameter value. */
+ char *param_name = concat (name, "=", NULL);
+ char *cp;
+
+ if ((cp = strstr (str, param_name))) {
+ char *start, *end;
+ size_t count = 1;
+
+ /* Remove any leading spaces, before the parameter name. */
+ for (start = cp;
+ start > str && isspace ((unsigned char) *(start-1));
+ --start) {
+ continue;
+ }
+ /* Remove a leading semicolon. */
+ if (start > str && *(start-1) == ';') { --start; }
+
+ end = cp + strlen (name) + 1;
+ if (*end == '"') {
+ /* Skip past the quoted value, and then the final quote. */
+ for (++end ; *end && *end != '"'; ++end) { continue; }
+ ++end;
+ } else {
+ /* Skip past the value. */
+ for (++end ; *end && ! isspace ((unsigned char) *end); ++end) {}
+ }
+
+ /* Count how many characters need to be moved. Include
+ trailing null, which is accounted for by the
+ initialization of count to 1. */
+ for (cp = end; *cp; ++cp) { ++count; }
+ (void) memmove (start, end, count);
+ }
+
+ free (param_name);
+
+ return str;
+}
+
+
+/*
+ * Fix Content-Transfer-Encoding of composite,, e.g., message or multipart, part.
+ * According to RFC 2045 Sec. 6.4, it must be 7bit, 8bit, or binary. Set it to
+ * 8 bit.
+ */
+static int
+fix_composite_cte (CT ct, int *message_mods)
+{
+ int status = OK;
+
+ if (ct->c_type == CT_MESSAGE || ct->c_type == CT_MULTIPART) {
if (ct->c_encoding != CE_7BIT && ct->c_encoding != CE_8BIT &&
ct->c_encoding != CE_BINARY) {
HF hf;
for (hf = ct->c_first_hf; hf; hf = hf->next) {
char *name = hf->name;
- for (; *name && isspace ((unsigned char) *name); ++name) {
+ for (; isspace((unsigned char)*name); ++name) {
continue;
}
if (! strncasecmp (name, ENCODING_FIELD,
- strlen (ENCODING_FIELD))) {
+ LEN(ENCODING_FIELD))) {
char *prefix = "Nmh-REPLACED-INVALID-";
- HF h = mh_xmalloc (sizeof *h);
+ HF h;
- h->name = add (hf->name, NULL);
- h->hf_encoding = hf->hf_encoding;
+ NEW(h);
+ h->name = mh_xstrdup (hf->name);
h->next = hf->next;
hf->next = h;
free (encoding);
}
- h->value = add (" 8bit\n", NULL);
+ h->value = mh_xstrdup (" 8bit\n");
/* Don't need to warn for multiple C-T-E header
fields, parse_mime() already does that. But
set_ce (ct, CE_8BIT);
}
- m = (struct multipart *) ct->c_ctparams;
- for (part = m->mp_parts; part; part = part->mp_next) {
- if (fix_multipart_cte (part->mp_part, message_mods) != OK) {
- status = NOTOK;
- break;
+ if (ct->c_type == CT_MULTIPART) {
+ struct multipart *m;
+ struct part *part;
+
+ m = (struct multipart *) ct->c_ctparams;
+ for (part = m->mp_parts; part; part = part->mp_next) {
+ if (fix_composite_cte (part->mp_part, message_mods) != OK) {
+ status = NOTOK;
+ break;
+ }
}
}
}
}
+/*
+ * Set content encoding.
+ */
static int
-set_ce (CT ct, int encoding) {
+set_ce (CT ct, int encoding)
+{
const char *ce = ce_str (encoding);
const struct str2init *ctinit = get_ce_method (ce);
if (ctinit) {
char *cte = concat (" ", ce, "\n", NULL);
- int found_cte = 0;
+ bool found_cte = false;
HF hf;
/* Decoded contents might be in ct->c_cefile.ce_file, if the
caller is decode_text_parts (). Save because we'll
ct->c_cefile.ce_file to the name of the file containing
the contents. */
+ if (ct->c_ceclosefnx) {
+ (*ct->c_ceclosefnx) (ct);
+ }
+
/* Restore the cefile. */
ct->c_cefile = decoded_content_info;
/* Update/add Content-Transfer-Encoding header field. */
for (hf = ct->c_first_hf; hf; hf = hf->next) {
if (! strcasecmp (ENCODING_FIELD, hf->name)) {
- found_cte = 1;
+ found_cte = true;
free (hf->value);
hf->value = cte;
}
}
if (! found_cte) {
- add_header (ct, add (ENCODING_FIELD, NULL), cte);
+ add_header (ct, mh_xstrdup (ENCODING_FIELD), cte);
}
/* Update c_celine. It's used only by mhlist -debug. */
free (ct->c_celine);
- ct->c_celine = add (cte, NULL);
+ ct->c_celine = mh_xstrdup (cte);
return OK;
- } else {
- return NOTOK;
}
+
+ return NOTOK;
}
-/* Make sure each text part has a corresponding text/plain part. */
+/*
+ * Make sure each text part has a corresponding text/plain part.
+ */
static int
-ensure_text_plain (CT *ct, CT parent, int *message_mods, int replacetextplain) {
+ensure_text_plain (CT *ct, CT parent, int *message_mods, int replacetextplain)
+{
int status = OK;
switch ((*ct)->c_type) {
free (type_subtype);
if (! has_text_plain) {
- /* Parent is a multipart/alternative. Insert a new
- text/plain subpart. */
- const int inserted =
- insert_new_text_plain_part (*ct, new_subpart_number,
- parent);
- if (inserted) {
- ++*message_mods;
- if (verbosw) {
- report (NULL, parent->c_partno, parent->c_file,
- "insert text/plain part");
+ struct multipart *mp = (struct multipart *) parent->c_ctparams;
+ struct part *part;
+ int siblings = 0;
+
+ for (part = mp->mp_parts; part; part = part->mp_next) {
+ if (*ct != part->mp_part) {
+ ++siblings;
}
- } else {
- status = NOTOK;
}
- }
- } else {
- /* Slip new text/plain part into a new multipart/alternative. */
- CT tp_part = build_text_plain_part (*ct);
- if (tp_part) {
- CT mp_alt = build_multipart_alt (*ct, tp_part, CT_MULTIPART,
- MULTI_ALTERNATE);
- if (mp_alt) {
- struct multipart *mp =
- (struct multipart *) mp_alt->c_ctparams;
-
- if (mp && mp->mp_parts) {
- mp->mp_parts->mp_part = tp_part;
- /* Make the new multipart/alternative the parent. */
- *ct = mp_alt;
+ if (siblings) {
+ /* Parent is a multipart/related. Insert a new
+ text/plain subpart in a new multipart/alternative. */
+ if (insert_into_new_mp_alt (ct, message_mods)) {
+ /* Not an error if text/plain couldn't be added. */
+ }
+ } else {
+ /* There are no siblings, so insert a new text/plain
+ subpart, and change the parent type from
+ multipart/related to multipart/alternative. */
+ const int inserted =
+ insert_new_text_plain_part (*ct, new_subpart_number,
+ parent);
+
+ if (inserted) {
+ HF hf;
+
+ parent->c_subtype = MULTI_ALTERNATE;
+ free (parent->c_ctinfo.ci_subtype);
+ parent->c_ctinfo.ci_subtype = mh_xstrdup("alternative");
+ if (! replace_substring (&parent->c_ctline, "/related",
+ "/alternative")) {
+ inform("did not find multipart/related in %s",
+ parent->c_ctline);
+ }
- ++*message_mods;
- if (verbosw) {
- report (NULL, (*ct)->c_partno, (*ct)->c_file,
- "insert text/plain part");
+ /* Update Content-Type header field. */
+ for (hf = parent->c_first_hf; hf; hf = hf->next) {
+ if (! strcasecmp (TYPE_FIELD, hf->name)) {
+ if (replace_substring (&hf->value, "/related",
+ "/alternative")) {
+ ++*message_mods;
+ if (verbosw) {
+ report (NULL, parent->c_partno,
+ parent->c_file,
+ "insert text/plain part");
+ }
+
+ /* Remove, e.g., type="text/html" from
+ multipart/alternative. */
+ remove_parameter (hf->value, "type");
+ break;
+ }
+ inform("did not find multipart/"
+ "related in header %s", hf->value);
+ }
}
} else {
- free_content (tp_part);
- free_content (mp_alt);
- status = NOTOK;
+ /* Not an error if text/plain couldn't be inserted. */
}
- } else {
- status = NOTOK;
}
- } else {
+ }
+ } else {
+ if (insert_into_new_mp_alt (ct, message_mods)) {
status = NOTOK;
}
}
}
-/* See if there is a sibling text/plain. */
+/*
+ * See if there is a sibling text/plain, and return its subpart number.
+ */
static int
find_textplain_sibling (CT parent, int replacetextplain,
- int *new_subpart_number) {
+ int *new_subpart_number)
+{
struct multipart *mp = (struct multipart *) parent->c_ctparams;
struct part *part, *prev;
- int has_text_plain = 0;
+ bool has_text_plain = false;
for (prev = part = mp->mp_parts; part; part = part->mp_next) {
++*new_subpart_number;
free_content (old_part->mp_part);
free (old_part);
} else {
- has_text_plain = 1;
+ has_text_plain = true;
}
break;
}
}
+/*
+ * Insert a new text/plain part in a multipart part.
+ */
static int
-insert_new_text_plain_part (CT ct, int new_subpart_number, CT parent) {
+insert_new_text_plain_part (CT ct, int new_subpart_number, CT parent)
+{
struct multipart *mp = (struct multipart *) parent->c_ctparams;
- struct part *new_part = mh_xmalloc (sizeof *new_part);
+ struct part *new_part;
+ NEW(new_part);
if ((new_part->mp_part = build_text_plain_part (ct))) {
char buffer[16];
snprintf (buffer, sizeof buffer, "%d", new_subpart_number);
buffer, NULL);
return 1;
- } else {
- free_content (new_part->mp_part);
- free (new_part);
-
- return 0;
}
+
+ free_content (new_part->mp_part);
+ free (new_part);
+
+ return 0;
}
+/*
+ * Create a text/plain part to go along with non-plain sibling part.
+ */
static CT
-build_text_plain_part (CT encoded_part) {
+build_text_plain_part (CT encoded_part)
+{
CT tp_part = divide_part (encoded_part);
char *tmp_plain_file = NULL;
be unlinked by free_content (). */
char *tempfile;
+ /* This m_mktemp2() call closes the temp file. */
if ((tempfile = m_mktemp2 (NULL, invo_name, NULL, NULL)) == NULL) {
- advise (NULL, "unable to create temporary file in %s",
+ inform("unable to create temporary file in %s",
get_temp_dir());
- }
- tmp_plain_file = add (tempfile, NULL);
- if (reformat_part (tp_part, tmp_plain_file,
- tp_part->c_ctinfo.ci_type,
- tp_part->c_ctinfo.ci_subtype,
- tp_part->c_type) == OK) {
- return tp_part;
+ } else {
+ tmp_plain_file = mh_xstrdup (tempfile);
+ if (reformat_part (tp_part, tmp_plain_file,
+ tp_part->c_ctinfo.ci_type,
+ tp_part->c_ctinfo.ci_subtype,
+ tp_part->c_type) == OK) {
+ return tp_part;
+ }
}
}
}
-static CT
-divide_part (CT ct) {
- CT new_part;
+/*
+ * Slip new text/plain part into a new multipart/alternative.
+ */
+static int
+insert_into_new_mp_alt (CT *ct, int *message_mods)
+{
+ /* The following will call decode_part(). */
+ CT tp_part = build_text_plain_part (*ct);
+ int status = OK;
- if ((new_part = (CT) mh_xcalloc (1, sizeof *new_part)) == NULL)
- adios (NULL, "out of memory");
+ if (tp_part) {
+ CT mp_alt = build_multipart (*ct, tp_part, CT_MULTIPART,
+ MULTI_ALTERNATE);
+ if (mp_alt) {
+ struct multipart *mp = (struct multipart *) mp_alt->c_ctparams;
- /* Just copy over what is needed for decoding. c_vrsn and
- c_celine aren't necessary. */
- new_part->c_file = add (ct->c_file, NULL);
- new_part->c_begin = ct->c_begin;
- new_part->c_end = ct->c_end;
- copy_ctinfo (&new_part->c_ctinfo, &ct->c_ctinfo);
+ if (mp && mp->mp_parts) {
+ mp->mp_parts->mp_part = tp_part;
+ /* Make the new multipart/alternative the parent. */
+ *ct = mp_alt;
+
+ ++*message_mods;
+ if (verbosw) {
+ report (NULL, (*ct)->c_partno, (*ct)->c_file,
+ "insert text/plain part");
+ }
+ } else {
+ free_content (tp_part);
+ free_content (mp_alt);
+ status = NOTOK;
+ }
+ } else {
+ status = NOTOK;
+ }
+ } else {
+ /* Not an error if text/plain couldn't be built. */
+ }
+
+ return status;
+}
+
+
+/*
+ * Slip new text/plain part into a new multipart/mixed.
+ */
+static int
+insert_into_new_mp_mixed (CT *ct, const char *content, int *message_mods)
+{
+ CT main_part = divide_part (*ct);
+ const char *reason = NULL;
+ const int encoding = content_encoding (main_part, &reason);
+ int status = OK;
+
+ if (set_ct_type(main_part, (*ct)->c_type, (*ct)->c_subtype,
+ main_part->c_encoding) != OK) {
+ inform("failed to set Content-Type of main part");
+ return NOTOK;
+ }
+ if (set_ct_type(*ct, (*ct)->c_type, (*ct)->c_subtype, encoding) != OK) {
+ inform("failed to set Content-Type of new part");
+ return NOTOK;
+ }
+
+ if (main_part) {
+ /* Load remainder into the new part. */
+ CE cefile = &(*ct)->c_cefile;
+ CT mp_alt;
+
+ cefile->ce_file =
+ mh_xstrdup(m_mktemp2 (NULL, invo_name, NULL, &cefile->ce_fp));
+ if (cefile->ce_file == NULL) {
+ die("unable to create temporary file in %s", get_temp_dir());
+ }
+ cefile->ce_unlink = 1;
+ fprintf (cefile->ce_fp, "%s", content);
+
+ /* Put both parts into a new multipart. */
+ mp_alt = build_multipart (*ct, main_part, CT_MULTIPART, MULTI_MIXED);
+ if (mp_alt) {
+ struct multipart *mp = (struct multipart *) mp_alt->c_ctparams;
+
+ /* So fix_composite_cte doesn't try to overwrite the encoding. If
+ the content needs to be decoded, c_encoding will be properly
+ set. */
+ mp_alt->c_encoding = encoding;
+
+ if (mp && mp->mp_parts) {
+ mp->mp_parts->mp_part = main_part;
+ /* Make the new multipart/alternative the parent. */
+ *ct = mp_alt;
+
+ ++*message_mods;
+ if (verbosw) {
+ report (NULL, (*ct)->c_partno, (*ct)->c_file,
+ "insert text/plain part");
+ }
+ } else {
+ free_content (main_part);
+ free_content (mp_alt);
+ status = NOTOK;
+ }
+ } else {
+ inform("failed to build multipart/alternate");
+ status = NOTOK;
+ }
+ } else {
+ /* Should never happen. */
+ inform("failed to insert new text part into multipart/related");
+ status = NOTOK;
+ }
+
+ return status;
+}
+
+
+/*
+ * Clone a MIME part.
+ */
+static CT
+divide_part (CT ct)
+{
+ CT new_part;
+
+ NEW0(new_part);
+ /* Just copy over what is needed for decoding. c_vrsn and
+ c_celine aren't necessary. */
+ new_part->c_file = mh_xstrdup (ct->c_file);
+ new_part->c_begin = ct->c_begin;
+ new_part->c_end = ct->c_end;
+ copy_ctinfo (&new_part->c_ctinfo, &ct->c_ctinfo);
new_part->c_type = ct->c_type;
new_part->c_cefile = ct->c_cefile;
new_part->c_encoding = ct->c_encoding;
/* c_ctline is used by reformat__part(), so it can preserve
anything after the type/subtype. */
- new_part->c_ctline = add (ct->c_ctline, NULL);
+ new_part->c_ctline = mh_xstrdup (ct->c_ctline);
return new_part;
}
+/*
+ * Copy the content info from one part to another.
+ */
static void
-copy_ctinfo (CI dest, CI src) {
+copy_ctinfo (CI dest, CI src)
+{
PM s_pm, d_pm;
- dest->ci_type = src->ci_type ? add (src->ci_type, NULL) : NULL;
- dest->ci_subtype = src->ci_subtype ? add (src->ci_subtype, NULL) : NULL;
+ dest->ci_type = src->ci_type ? mh_xstrdup (src->ci_type) : NULL;
+ dest->ci_subtype = src->ci_subtype ? mh_xstrdup (src->ci_subtype) : NULL;
for (s_pm = src->ci_first_pm; s_pm; s_pm = s_pm->pm_next) {
- d_pm = add_param(&dest->ci_first_pm, &dest->ci_last_pm, s_pm->pm_name,
- s_pm->pm_value, 0);
- if (s_pm->pm_charset)
- d_pm->pm_charset = getcpy(s_pm->pm_charset);
- if (s_pm->pm_lang)
- d_pm->pm_lang = getcpy(s_pm->pm_lang);
+ d_pm = add_param(&dest->ci_first_pm, &dest->ci_last_pm, s_pm->pm_name,
+ s_pm->pm_value, 0);
+ if (s_pm->pm_charset) {
+ d_pm->pm_charset = mh_xstrdup(s_pm->pm_charset);
+ }
+ if (s_pm->pm_lang) {
+ d_pm->pm_lang = mh_xstrdup(s_pm->pm_lang);
+ }
}
- dest->ci_comment = src->ci_comment ? add (src->ci_comment, NULL) : NULL;
- dest->ci_magic = src->ci_magic ? add (src->ci_magic, NULL) : NULL;
+ dest->ci_comment = src->ci_comment ? mh_xstrdup (src->ci_comment) : NULL;
+ dest->ci_magic = src->ci_magic ? mh_xstrdup (src->ci_magic) : NULL;
}
+/*
+ * Decode content.
+ */
static int
-decode_part (CT ct) {
- char *tmp_decoded;
+decode_part (CT ct)
+{
+ char *tempfile, *tmp_decoded;
+ FILE *file;
int status;
- char *tempfile;
- if ((tempfile = m_mktemp2 (NULL, invo_name, NULL, NULL)) == NULL) {
- adios (NULL, "unable to create temporary file in %s", get_temp_dir());
+ if ((tempfile = m_mktemp2 (NULL, invo_name, NULL, &file)) == NULL) {
+ die("unable to create temporary file in %s", get_temp_dir());
}
- tmp_decoded = add (tempfile, NULL);
+ tmp_decoded = mh_xstrdup (tempfile);
/* The following call will load ct->c_cefile.ce_file with the tmp
filename of the decoded content. tmp_decoded will contain the
encoded output, get rid of that. */
- status = output_message (ct, tmp_decoded);
+ status = output_message_fp (ct, file, tmp_decoded);
(void) m_unlink (tmp_decoded);
free (tmp_decoded);
+ if (fclose (file)) {
+ inform("unable to close temporary file %s, continuing...", tempfile);
+ }
return status;
}
-/* Some of the arguments aren't really needed now, but maybe will
- be in the future for other than text types. */
+/*
+ * If base64-encoded content has a text trailer, return the location, relative
+ * to c->c_begin, where the valid base64 ends. And return the trailer in the
+ * addresses pointed to by remainderp. The caller is responsible for
+ * deallocating that. If no text trailer, return ct->c_end - ct->c_begin and
+ * leave remainderp unchanged.
+ */
+static size_t
+get_valid_base64 (CT ct, char **remainderp) {
+ const size_t len = ct->c_end - ct->c_begin;
+ char *buf, format[16];
+ size_t pos;
+ int fd;
+
+ if (! ct->c_fp && ((ct->c_fp = fopen (ct->c_file, "r")) == NULL)) {
+ advise (ct->c_file, "unable to open for reading");
+ return NOTOK;
+ }
+ if ((fd = fileno (ct->c_fp)) == -1 ||
+ lseek (fd, ct->c_begin, SEEK_SET) == (off_t) -1) {
+ advise (ct->c_file, "unable to seek in");
+ return NOTOK;
+ }
+ buf = mh_xmalloc(len + 1);
+ snprintf(format, sizeof format, "%%%luc", (unsigned long) len);
+ if (fscanf(ct->c_fp, format, buf) == EOF) {
+ advise (ct->c_file, "unable to read");
+ return NOTOK;
+ }
+ buf[len] = '\0';
+
+ pos = find_invalid_base64_pos(buf);
+
+ if (ct->c_begin + pos < (size_t) ct->c_end) {
+ *remainderp = mh_xstrdup(&buf[pos]);
+ } else {
+ pos = ct->c_end - ct->c_begin;
+ }
+ free(buf);
+
+ return pos;
+}
+
+
+/*
+ * Find position in byte string of invalid base64 code. Skip individual
+ * invalid characters because RFC 2045 Sec 6.8 says they should be ignored.
+ * The motivating use case is a text footer that was mistakenly applied to
+ * base64 content. Therefore, if any of these is found, return the position
+ * of:
+ * 1. The byte (or end) after one or two consecutive pad ('=') bytes.
+ * 2. The first of a pair of invalid base64 bytes.
+ *
+ * If the base64 code is valid, return the position of the null terminator.
+ *
+ * encoded - the base64-encoded string
+ */
+static size_t
+find_invalid_base64_pos (const char *encoded) {
+ const char *cp;
+ size_t pos;
+ bool found_pad = false;
+ unsigned int found_invalid = 0;
+
+ for (cp = encoded, pos = 0;
+ *cp && ! found_pad && found_invalid < 2;
+ ++cp, ++pos) {
+ if (isspace ((unsigned char) *cp) ||
+ isalnum ((unsigned char) *cp) ||
+ *cp == '+' || *cp == '/' || *cp == '=') {
+ /* Valid base64 byte. */
+ if (*cp == '=') {
+ /* "evidence that the end of the data has been reached"
+ according to RFC 2045 */
+ found_pad = true;
+ }
+ /* Require consecutive invalid bytes. Let decodeBase64() handle
+ individual ones. */
+ found_invalid = 0;
+ } else {
+ ++found_invalid;
+ }
+ }
+
+ if (found_pad && *cp && *cp == '=') {
+ /* Skip over last in pair of ==. */
+ ++cp, ++pos;
+ } else if (found_invalid == 2) {
+ /* If a pair of consecutive invalid bytes, back up to first one. */
+ --cp, --pos;
+ --cp, --pos;
+ }
+
+ /* Skip over any trailing whitespace. */
+ while (*cp && isspace((unsigned char) *cp)) {
+ ++cp, ++pos;
+ }
+
+ return pos;
+}
+
+
+/*
+ * Check for valid base64 encoding, and "fix" if invalid.
+ */
+static int
+check_base64_encoding (CT *ctp)
+{
+ char *remainder = NULL;
+ int status = OK;
+
+ /* If there's a footer after base64 content, set c_end to before it, and
+ store the footer in remainder. */
+ (*ctp)->c_end = (*ctp)->c_begin + get_valid_base64(*ctp, &remainder);
+
+ if (remainder != NULL) {
+ /* Move ct to a subpart of a new multipart/related, and add the
+ remainder as a new text/plain subpart of it. */
+ int ignore_message_mods = 0;
+
+ status = insert_into_new_mp_mixed(ctp, remainder, &ignore_message_mods);
+ free(remainder);
+ }
+
+ return status;
+}
+
+
+/*
+ * Reformat content as plain text.
+ * Some of the arguments aren't really needed now, but maybe will
+ * be in the future for other than text types.
+ */
static int
-reformat_part (CT ct, char *file, char *type, char *subtype, int c_type) {
+reformat_part (CT ct, char *file, char *type, char *subtype, int c_type)
+{
int output_subtype, output_encoding;
+ const char *reason = NULL;
char *cp, *cf;
int status;
/* Check for invo_name-format-type/subtype. */
if ((cf = context_find_by_type ("format", type, subtype)) == NULL) {
if (verbosw) {
- advise (NULL, "Don't know how to convert %s, there is no "
+ inform("Don't know how to convert %s, there is no "
"%s-format-%s/%s profile entry",
ct->c_file, invo_name, type, subtype);
}
return NOTOK;
- } else {
- if (strchr (cf, '>')) {
- advise (NULL, "'>' prohibited in \"%s\",\nplease fix your "
- "%s-format-%s/%s profile entry", cf, invo_name, type,
- subtype ? subtype : "");
+ }
+ if (strchr (cf, '>')) {
+ inform("'>' prohibited in \"%s\",\nplease fix your "
+ "%s-format-%s/%s profile entry", cf, invo_name, type,
+ FENDNULL(subtype));
- return NOTOK;
- }
+ return NOTOK;
}
cp = concat (cf, " >", file, NULL);
/* Set subtype to 0, which is always an UNKNOWN subtype. */
output_subtype = 0;
}
- output_encoding = charset_encoding (ct);
- if (set_ct_type (ct, c_type, output_subtype, output_encoding) == OK) {
+ output_encoding = content_encoding (ct, &reason);
+ if (status == OK &&
+ set_ct_type (ct, c_type, output_subtype, output_encoding) == OK) {
ct->c_cefile.ce_file = file;
ct->c_cefile.ce_unlink = 1;
} else {
}
-/* Identifies 7bit or 8bit content based on charset. */
-static int
-charset_encoding (CT ct) {
- char *ct_charset = content_charset (ct);
- int encoding = strcasecmp (ct_charset, "US-ASCII") ? CE_8BIT : CE_7BIT;
-
- free (ct_charset);
-
- return encoding;
-}
-
-
+/*
+ * Create and fill in a multipart part.
+ */
static CT
-build_multipart_alt (CT first_alt, CT new_part, int type, int subtype) {
+build_multipart (CT first_part, CT new_part, int type, int subtype)
+{
char *boundary_prefix = "----=_nmh-multipart";
- char *boundary = concat (boundary_prefix, first_alt->c_partno, NULL);
+ static unsigned int bp_uses = 0;
+ char bp_uses_buf[16];
+ char *boundary;
char *boundary_indicator = "; boundary=";
char *typename, *subtypename, *name;
CT ct;
struct multipart *m;
const struct str2init *ctinit;
- if ((ct = (CT) mh_xcalloc (1, sizeof *ct)) == NULL)
- adios (NULL, "out of memory");
+ NEW0(ct);
- /* Set up the multipart/alternative part. These fields of *ct were
+ if (bp_uses > 0) {
+ snprintf(bp_uses_buf, sizeof bp_uses_buf - 1, "-%d", bp_uses++);
+ } else {
+ bp_uses_buf[0] = '\0';
+ }
+ boundary =
+ concat (boundary_prefix, bp_uses_buf, first_part->c_partno, NULL);
+
+ /* Set up the multipart part. These fields of *ct were
initialized to 0 by mh_xcalloc():
c_fp, c_unlink, c_begin, c_end,
c_vrsn, c_ctline, c_celine,
c_showproc, c_termproc, c_storeproc, c_storage, c_folder
*/
- ct->c_file = add (first_alt->c_file, NULL);
+ ct->c_file = mh_xstrdup (first_part->c_file);
ct->c_type = type;
ct->c_subtype = subtype;
if ((found_boundary =
boundary_in_content (&new_part->c_cefile.ce_fp,
new_part->c_cefile.ce_file,
- boundary)) == -1) {
- free (ct);
- return NULL;
+ boundary)) == NOTOK) {
+ goto return_null;
}
}
/* Ensure that the boundary doesn't appear in the encoded
content. */
if (! found_boundary && new_part->c_file) {
- if ((found_boundary = boundary_in_content (&new_part->c_fp,
- new_part->c_file,
- boundary)) == -1) {
- free (ct);
- return NULL;
+ if ((found_boundary =
+ boundary_in_content (&new_part->c_fp,
+ new_part->c_file,
+ boundary)) == NOTOK) {
+ goto return_null;
}
}
snprintf (buffer2, sizeof buffer2, "%d", serial);
boundary =
concat (boundary_prefix,
- first_alt->c_partno ? first_alt->c_partno : "",
+ FENDNULL(first_part->c_partno),
"-", buffer2, NULL);
}
}
if (found_boundary) {
- advise (NULL, "giving up trying to find a unique boundary");
- free (ct);
- return NULL;
+ inform("giving up trying to find a unique boundary");
+ goto return_null;
}
}
boundary, "\"", NULL);
/* Load c_first_hf and c_last_hf. */
- transfer_noncontent_headers (first_alt, ct);
- add_header (ct, add (TYPE_FIELD, NULL), concat (name, "\n", NULL));
+ transfer_noncontent_headers (first_part, ct);
+ add_header (ct, mh_xstrdup (TYPE_FIELD), concat (name, "\n", NULL));
free (name);
/* Load c_partno. */
- if (first_alt->c_partno) {
- ct->c_partno = add (first_alt->c_partno, NULL);
- free (first_alt->c_partno);
- first_alt->c_partno = concat (ct->c_partno, ".1", NULL);
+ if (first_part->c_partno) {
+ ct->c_partno = mh_xstrdup (first_part->c_partno);
+ free (first_part->c_partno);
+ first_part->c_partno = concat (ct->c_partno, ".1", NULL);
new_part->c_partno = concat (ct->c_partno, ".2", NULL);
} else {
- first_alt->c_partno = add ("1", NULL);
- new_part->c_partno = add ("2", NULL);
+ first_part->c_partno = mh_xstrdup ("1");
+ new_part->c_partno = mh_xstrdup ("2");
}
if (ctinit) {
- ct->c_ctinfo.ci_type = add (typename, NULL);
- ct->c_ctinfo.ci_subtype = add (subtypename, NULL);
+ ct->c_ctinfo.ci_type = mh_xstrdup (typename);
+ ct->c_ctinfo.ci_subtype = mh_xstrdup (subtypename);
}
add_param(&ct->c_ctinfo.ci_first_pm, &ct->c_ctinfo.ci_last_pm,
"boundary", boundary, 0);
- p = (struct part *) mh_xmalloc (sizeof *p);
- p->mp_next = (struct part *) mh_xmalloc (sizeof *p->mp_next);
+ NEW(p);
+ NEW(p->mp_next);
p->mp_next->mp_next = NULL;
- p->mp_next->mp_part = first_alt;
+ p->mp_next->mp_part = first_part;
- if ((m = (struct multipart *) mh_xcalloc (1, sizeof (struct multipart))) ==
- NULL)
- adios (NULL, "out of memory");
+ NEW0(m);
m->mp_start = concat (boundary, "\n", NULL);
m->mp_stop = concat (boundary, "--\n", NULL);
m->mp_parts = p;
free (boundary);
return ct;
+
+return_null:
+ free_content(ct);
+ free(boundary);
+ return NULL;
}
-/* Check that the boundary does not appear in the content. */
+/*
+ * Check that the boundary does not appear in the content.
+ */
static int
-boundary_in_content (FILE **fp, char *file, const char *boundary) {
- char buffer[BUFSIZ];
+boundary_in_content (FILE **fp, char *file, const char *boundary)
+{
+ char buffer[NMH_BUFSIZ];
size_t bytes_read;
- int found_boundary = 0;
+ bool found_boundary = false;
/* free_content() will close *fp if we fopen it here. */
if (! *fp && (*fp = fopen (file, "r")) == NULL) {
fseeko (*fp, 0L, SEEK_SET);
while ((bytes_read = fread (buffer, 1, sizeof buffer, *fp)) > 0) {
if (find_str (buffer, bytes_read, boundary)) {
- found_boundary = 1;
+ found_boundary = true;
break;
}
}
}
-/* Remove all non-Content headers. */
+/*
+ * Remove all non-Content headers.
+ */
static void
-transfer_noncontent_headers (CT old, CT new) {
+transfer_noncontent_headers (CT old, CT new)
+{
HF hp, hp_prev;
hp_prev = hp = old->c_first_hf;
while (hp) {
HF next = hp->next;
- if (strncasecmp (XXX_FIELD_PRF, hp->name, strlen (XXX_FIELD_PRF))) {
+ if (strncasecmp (XXX_FIELD_PRF, hp->name, LEN(XXX_FIELD_PRF))) {
if (hp == old->c_last_hf) {
if (hp == old->c_first_hf) {
old->c_last_hf = old->c_first_hf = NULL;
}
+/*
+ * Set content type.
+ */
static int
-set_ct_type (CT ct, int type, int subtype, int encoding) {
+set_ct_type (CT ct, int type, int subtype, int encoding)
+{
char *typename = ct_type_str (type);
char *subtypename = ct_subtype_str (type, subtype);
/* E.g, " text/plain" */
char *type_subtypename = concat (" ", typename, "/", subtypename, NULL);
/* E.g, " text/plain\n" */
char *name_plus_nl = concat (type_subtypename, "\n", NULL);
- int found_content_type = 0;
+ bool found_content_type = false;
HF hf;
const char *cp = NULL;
char *ctline;
/* Update/add Content-Type header field. */
for (hf = ct->c_first_hf; hf; hf = hf->next) {
if (! strcasecmp (TYPE_FIELD, hf->name)) {
- found_content_type = 1;
+ found_content_type = true;
free (hf->value);
hf->value = (cp = strchr (ct->c_ctline, ';'))
? concat (type_subtypename, cp, "\n", NULL)
- : add (name_plus_nl, NULL);
+ : mh_xstrdup (name_plus_nl);
}
}
if (! found_content_type) {
- add_header (ct, add (TYPE_FIELD, NULL),
+ add_header (ct, mh_xstrdup (TYPE_FIELD),
(cp = strchr (ct->c_ctline, ';'))
? concat (type_subtypename, cp, "\n", NULL)
- : add (name_plus_nl, NULL));
+ : mh_xstrdup (name_plus_nl));
}
/* Some of these might not be used, but set them anyway. */
ct->c_ctline = ctline;
/* Leave other ctinfo members as they were. */
free (ct->c_ctinfo.ci_type);
- ct->c_ctinfo.ci_type = add (typename, NULL);
+ ct->c_ctinfo.ci_type = mh_xstrdup (typename);
free (ct->c_ctinfo.ci_subtype);
- ct->c_ctinfo.ci_subtype = add (subtypename, NULL);
+ ct->c_ctinfo.ci_subtype = mh_xstrdup (subtypename);
ct->c_type = type;
ct->c_subtype = subtype;
}
+/*
+ * It's not necessary to update the charset parameter of a Content-Type
+ * header for a text part. According to RFC 2045 Sec. 6.4, the body
+ * (content) was originally in the specified charset, "and will be in
+ * that character set again after decoding."
+ */
static int
-decode_text_parts (CT ct, int encoding, int *message_mods) {
+decode_text_parts (CT ct, int encoding, const char *decodetypes,
+ int *message_mods)
+{
int status = OK;
+ int lf_line_endings = 0;
switch (ct->c_type) {
- case CT_TEXT:
+ case CT_MULTIPART: {
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct part *part;
+
+ /* Should check to see if the body for this part is encoded?
+ For now, it gets passed along as-is by InitMultiPart(). */
+ for (part = m->mp_parts; status == OK && part; part = part->mp_next) {
+ status = decode_text_parts (part->mp_part, encoding, decodetypes,
+ message_mods);
+ }
+ break;
+ }
+
+ case CT_MESSAGE:
+ if (ct->c_subtype == MESSAGE_EXTERNAL) {
+ struct exbody *e = (struct exbody *) ct->c_ctparams;
+
+ status = decode_text_parts (e->eb_content, encoding, decodetypes,
+ message_mods);
+ }
+ break;
+
+ default:
+ if (! should_decode(decodetypes, ct->c_ctinfo.ci_type, ct->c_ctinfo.ci_subtype)) {
+ break;
+ }
+
+ lf_line_endings =
+ ct->c_ctparams && ((struct text *) ct->c_ctparams)->lf_line_endings;
+
switch (ct->c_encoding) {
case CE_BASE64:
case CE_QUOTED: {
report (NULL, ct->c_partno, ct->c_file,
"will not decode%s because it is binary (%s)",
ct->c_partno ? ""
- : ct->c_ctline ? ct->c_ctline
- : "",
+ : (FENDNULL(ct->c_ctline)),
reason);
}
(void) m_unlink (ct->c_cefile.ce_file);
report (NULL, ct->c_partno, ct->c_file,
"will not decode%s because it is 8bit",
ct->c_partno ? ""
- : ct->c_ctline ? ct->c_ctline
- : "");
+ : (FENDNULL(ct->c_ctline)));
}
(void) m_unlink (ct->c_cefile.ce_file);
free (ct->c_cefile.ce_file);
ct->c_cefile.ce_file = NULL;
} else {
int enc;
- if (ct_encoding == CE_BINARY)
+
+ if (ct_encoding == CE_BINARY) {
enc = CE_BINARY;
- else if (ct_encoding == CE_8BIT && encoding == CE_7BIT)
+ } else if (ct_encoding == CE_8BIT && encoding == CE_7BIT) {
enc = CE_QUOTED;
- else
- enc = charset_encoding (ct);
+ } else {
+ enc = ct_encoding;
+ }
if (set_ce (ct, enc) == OK) {
++*message_mods;
if (verbosw) {
report (NULL, ct->c_partno, ct->c_file, "decode%s",
- ct->c_ctline ? ct->c_ctline : "");
+ FENDNULL(ct->c_ctline));
+ }
+ if (lf_line_endings) {
+ strip_crs (ct, message_mods);
}
- strip_crs (ct, message_mods);
} else {
status = NOTOK;
}
}
case CE_8BIT:
case CE_7BIT:
- strip_crs (ct, message_mods);
+ if (lf_line_endings) {
+ strip_crs (ct, message_mods);
+ }
break;
default:
break;
}
break;
-
- case CT_MULTIPART: {
- struct multipart *m = (struct multipart *) ct->c_ctparams;
- struct part *part;
-
- /* Should check to see if the body for this part is encoded?
- For now, it gets passed along as-is by InitMultiPart(). */
- for (part = m->mp_parts; status == OK && part; part = part->mp_next) {
- status = decode_text_parts (part->mp_part, encoding, message_mods);
- }
- break;
}
- case CT_MESSAGE:
- if (ct->c_subtype == MESSAGE_EXTERNAL) {
- struct exbody *e = (struct exbody *) ct->c_ctparams;
+ return status;
+}
- status = decode_text_parts (e->eb_content, encoding, message_mods);
- }
- break;
- default:
- break;
+/*
+ * Determine if the part with type[/subtype] should be decoded, according to
+ * decodetypes (which came from the -decodetypes switch).
+ */
+static int
+should_decode(const char *decodetypes, const char *type, const char *subtype)
+{
+ /* Quick search for matching type[/subtype] in decodetypes: bracket
+ decodetypes with commas, then search for ,type, and ,type/subtype, in
+ it. */
+
+ bool found_match = false;
+ char *delimited_decodetypes = concat(",", decodetypes, ",", NULL);
+ char *delimited_type = concat(",", type, ",", NULL);
+
+ if (nmh_strcasestr(delimited_decodetypes, delimited_type)) {
+ found_match = true;
+ } else if (subtype != NULL) {
+ char *delimited_type_subtype =
+ concat(",", type, "/", subtype, ",", NULL);
+
+ if (nmh_strcasestr(delimited_decodetypes, delimited_type_subtype)) {
+ found_match = true;
+ }
+ free(delimited_type_subtype);
}
- return status;
+ free(delimited_type);
+ free(delimited_decodetypes);
+
+ return found_match;
}
-/* See if the decoded content is 7bit, 8bit, or binary. It's binary
- if it has any NUL characters, a CR not followed by a LF, or lines
- greater than 998 characters in length. If binary, reason is set
- to a string explaining why. */
+/*
+ * See if the decoded content is 7bit, 8bit, or binary. It's binary
+ * if it has any NUL characters, a CR not followed by a LF, or lines
+ * greater than 998 characters in length. If binary, reason is set
+ * to a string explaining why.
+ */
static int
-content_encoding (CT ct, const char **reason) {
+content_encoding (CT ct, const char **reason)
+{
CE ce = &ct->c_cefile;
int encoding = CE_7BIT;
if (ce->ce_file) {
size_t line_len = 0;
- char buffer[BUFSIZ];
+ char buffer[NMH_BUFSIZ];
size_t inbytes;
if (! ce->ce_fp && (ce->ce_fp = fopen (ce->ce_file, "r")) == NULL) {
*reason = "";
}
break;
- } else if (*cp == '\n') {
+ }
+ if (*cp == '\n') {
line_len = 0;
} else if (! isascii ((unsigned char) *cp)) {
encoding = CE_8BIT;
}
- last_char_was_cr = *cp == '\r' ? 1 : 0;
+ last_char_was_cr = *cp == '\r';
}
}
}
+/*
+ * Strip carriage returns from content.
+ */
static int
-strip_crs (CT ct, int *message_mods) {
+strip_crs (CT ct, int *message_mods)
+{
char *charset = content_charset (ct);
int status = OK;
FILE **fp = NULL;
size_t begin;
size_t end;
- int has_crs = 0;
- int opened_input_file = 0;
+ bool has_crs = false;
+ bool opened_input_file = false;
if (ct->c_cefile.ce_file) {
file = &ct->c_cefile.ce_file;
advise (*file, "unable to open for reading");
status = NOTOK;
} else {
- opened_input_file = 1;
+ opened_input_file = true;
}
}
}
if (fp && *fp) {
- char buffer[BUFSIZ];
+ char buffer[NMH_BUFSIZ];
size_t bytes_read;
size_t bytes_to_read =
end > 0 && end > begin ? end - begin : sizeof buffer;
modify the content. */
char *cp;
size_t i;
- int last_char_was_cr = 0;
+ bool last_char_was_cr = false;
if (end > 0) { bytes_to_read -= bytes_read; }
for (i = 0, cp = buffer; i < bytes_read; ++i, ++cp) {
if (*cp == '\n' && last_char_was_cr) {
- has_crs = 1;
+ has_crs = true;
break;
}
- last_char_was_cr = *cp == '\r' ? 1 : 0;
+ last_char_was_cr = *cp == '\r';
}
}
char *tempfile = m_mktemp2 (NULL, invo_name, &fd, NULL);
if (tempfile == NULL) {
- adios (NULL, "unable to create temporary file in %s",
+ die("unable to create temporary file in %s",
get_temp_dir());
}
- stripped_content_file = add (tempfile, NULL);
+ stripped_content_file = mh_xstrdup (tempfile);
/* Strip each CR before a LF from the content. */
fseeko (*fp, begin, SEEK_SET);
0) {
char *cp;
size_t i;
- int last_char_was_cr = 0;
+ bool last_char_was_cr = false;
for (i = 0, cp = buffer; i < bytes_read; ++i, ++cp) {
if (*cp == '\r') {
- last_char_was_cr = 1;
+ last_char_was_cr = true;
} else if (last_char_was_cr) {
if (*cp != '\n') {
if (write (fd, "\r", 1) < 0) {
if (write (fd, cp, 1) < 0) {
advise (tempfile, "write");
}
- last_char_was_cr = 0;
+ last_char_was_cr = false;
} else {
if (write (fd, cp, 1) < 0) {
advise (tempfile, "write");
}
- last_char_was_cr = 0;
+ last_char_was_cr = false;
}
}
}
if (close (fd)) {
- admonish (NULL, "unable to write temporary file %s",
+ inform("unable to write temporary file %s, continuing...",
stripped_content_file);
(void) m_unlink (stripped_content_file);
+ free(stripped_content_file);
status = NOTOK;
} else {
/* Replace the decoded file with the converted one. */
- if (ct->c_cefile.ce_file) {
- if (ct->c_cefile.ce_unlink) {
- (void) m_unlink (ct->c_cefile.ce_file);
- }
- free (ct->c_cefile.ce_file);
- }
+ if (ct->c_cefile.ce_file && ct->c_cefile.ce_unlink)
+ (void) m_unlink (ct->c_cefile.ce_file);
+
+ free(ct->c_cefile.ce_file);
ct->c_cefile.ce_file = stripped_content_file;
ct->c_cefile.ce_unlink = 1;
}
+/*
+ * Add/update, if necessary, the message C-T-E, based on the least restrictive
+ * of the part C-T-E's.
+ */
+static void
+update_cte (CT ct)
+{
+ const int least_restrictive_enc = least_restrictive_encoding (ct);
+
+ if (least_restrictive_enc != CE_UNKNOWN &&
+ least_restrictive_enc != CE_7BIT) {
+ char *cte = concat (" ", ce_str (least_restrictive_enc), "\n", NULL);
+ HF hf;
+ bool found_cte = false;
+
+ /* Update/add Content-Transfer-Encoding header field. */
+ for (hf = ct->c_first_hf; hf; hf = hf->next) {
+ if (! strcasecmp (ENCODING_FIELD, hf->name)) {
+ found_cte = true;
+ free (hf->value);
+ hf->value = cte;
+ }
+ }
+ if (! found_cte) {
+ add_header (ct, mh_xstrdup (ENCODING_FIELD), cte);
+ }
+ }
+}
+
+
+/*
+ * Find the least restrictive encoding (7bit, 8bit, binary) of the parts
+ * within a message.
+ */
static int
-convert_charsets (CT ct, char *dest_charset, int *message_mods) {
+least_restrictive_encoding (CT ct)
+{
+ int encoding = CE_UNKNOWN;
+
+ switch (ct->c_type) {
+ case CT_MULTIPART: {
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct part *part;
+
+ for (part = m->mp_parts; part; part = part->mp_next) {
+ const int part_encoding =
+ least_restrictive_encoding (part->mp_part);
+
+ if (less_restrictive (encoding, part_encoding)) {
+ encoding = part_encoding;
+ }
+ }
+ break;
+ }
+
+ case CT_MESSAGE:
+ if (ct->c_subtype == MESSAGE_EXTERNAL) {
+ struct exbody *e = (struct exbody *) ct->c_ctparams;
+ const int part_encoding =
+ least_restrictive_encoding (e->eb_content);
+
+ if (less_restrictive (encoding, part_encoding)) {
+ encoding = part_encoding;
+ }
+ }
+ break;
+
+ default: {
+ if (less_restrictive (encoding, ct->c_encoding)) {
+ encoding = ct->c_encoding;
+ }
+ }}
+
+ return encoding;
+}
+
+
+/*
+ * Return whether the second encoding is less restrictive than the first, where
+ * "less restrictive" is in the sense used by RFC 2045 Secs. 6.1 and 6.4. So,
+ * CE_BINARY is less restrictive than CE_8BIT and
+ * CE_8BIT is less restrictive than CE_7BIT.
+ */
+static int
+less_restrictive (int encoding, int second_encoding)
+{
+ switch (second_encoding) {
+ case CE_BINARY:
+ return encoding != CE_BINARY;
+ case CE_8BIT:
+ return encoding != CE_BINARY && encoding != CE_8BIT;
+ case CE_7BIT:
+ return encoding != CE_BINARY && encoding != CE_8BIT &&
+ encoding != CE_7BIT;
+ default :
+ return 0;
+ }
+}
+
+
+/*
+ * Convert character set of each part.
+ */
+static int
+convert_charsets (CT ct, char *dest_charset, int *message_mods)
+{
int status = OK;
switch (ct->c_type) {
/*
* Fix various problems that aren't handled elsewhere. These
* are fixed unconditionally: there are no switches to disable
- * them. (Currently, "problems" is just one: an extraneous
- * semicolon at the end of a header parameter list.)
+ * them. Currently, "problems" are these:
+ * 1) remove extraneous semicolon at the end of a header parameter list
+ * 2) replace RFC 2047 encoding with RFC 2231 encoding of name and
+ * filename parameters in Content-Type and Content-Disposition
+ * headers, respectively.
*/
static int
-fix_always (CT ct, int *message_mods) {
+fix_always (CT *ctp, const fix_transformations *fx, int *message_mods)
+{
int status = OK;
- switch (ct->c_type) {
+ switch ((*ctp)->c_type) {
case CT_MULTIPART: {
- struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct multipart *m = (struct multipart *) (*ctp)->c_ctparams;
struct part *part;
for (part = m->mp_parts; status == OK && part; part = part->mp_next) {
- status = fix_always (part->mp_part, message_mods);
+ status = fix_always (&part->mp_part, fx, message_mods);
}
break;
}
case CT_MESSAGE:
- if (ct->c_subtype == MESSAGE_EXTERNAL) {
- struct exbody *e = (struct exbody *) ct->c_ctparams;
+ if ((*ctp)->c_subtype == MESSAGE_EXTERNAL) {
+ struct exbody *e = (struct exbody *) (*ctp)->c_ctparams;
- status = fix_always (e->eb_content, message_mods);
+ status = fix_always (&e->eb_content, fx, message_mods);
}
break;
default: {
HF hf;
- for (hf = ct->c_first_hf; hf; hf = hf->next) {
+ if ((*ctp)->c_first_hf) {
+ fix_filename_encoding (*ctp);
+ }
+
+ for (hf = (*ctp)->c_first_hf; hf; hf = hf->next) {
size_t len = strlen (hf->value);
+ if (strcasecmp (hf->name, TYPE_FIELD) != 0 &&
+ strcasecmp (hf->name, DISPO_FIELD) != 0) {
+ /* Only do this for Content-Type and
+ Content-Disposition fields because those are the
+ only headers that parse_mime() warns about. */
+ continue;
+ }
+
/* whitespace following a trailing ';' will be nuked as well */
- if (hf->value[len - 1] == '\n')
- while (isspace(hf->value[len - 2])) len--;
+ if (hf->value[len - 1] == '\n') {
+ while (isspace((unsigned char)(hf->value[len - 2]))) {
+ if (len-- == 0) { break; }
+ }
+ }
if (hf->value[len - 2] == ';') {
/* Remove trailing ';' from parameter value. */
hf->value[len - 1] = '\0';
/* Also, if Content-Type parameter, remove trailing ';'
- from ct->c_ctline. This probably isn't necessary
+ from (*ctp)->c_ctline. This probably isn't necessary
but can't hurt. */
- if (strcasecmp(hf->name, "Content-Type") == 0 && ct->c_ctline) {
- size_t l = strlen(ct->c_ctline) - 1;
- while (isspace(ct->c_ctline[l]) || ct->c_ctline[l] == ';')
- ct->c_ctline[l--] = '\0';
+ if (strcasecmp(hf->name, TYPE_FIELD) == 0 && (*ctp)->c_ctline) {
+ size_t l = strlen((*ctp)->c_ctline) - 1;
+ while (isspace((unsigned char)((*ctp)->c_ctline[l])) ||
+ (*ctp)->c_ctline[l] == ';') {
+ (*ctp)->c_ctline[l--] = '\0';
+ if (l == 0) { break; }
+ }
}
++*message_mods;
if (verbosw) {
- report (NULL, ct->c_partno, ct->c_file,
+ report (NULL, (*ctp)->c_partno, (*ctp)->c_file,
"remove trailing ; from %s parameter value",
hf->name);
}
}
}
+
+ if (fx->checkbase64 && (*ctp)->c_encoding == CE_BASE64) {
+ status = check_base64_encoding (ctp);
+ }
}}
return status;
}
+/*
+ * Decodes UTF-8 encoded header values. Similar to fix_filename_param(), but
+ * does not modify any MIME parameter values.
+ */
static int
-write_content (CT ct, char *input_filename, char *outfile, int modify_inplace,
- int message_mods) {
+decode_header_field_bodies (CT ct, int *message_mods)
+{
+ int status = OK;
+
+ switch (ct->c_type) {
+ case CT_MULTIPART: {
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct part *part;
+
+ for (part = m->mp_parts; status == OK && part; part = part->mp_next) {
+ status = decode_header_field_bodies (part->mp_part, message_mods);
+ }
+ break;
+ }
+
+ case CT_MESSAGE:
+ if (ct->c_subtype == MESSAGE_EXTERNAL) {
+ struct exbody *e = (struct exbody *) ct->c_ctparams;
+
+ status = decode_header_field_bodies (e->eb_content, message_mods);
+ }
+ break;
+ }
+
+ HF hf;
+
+ for (hf = ct->c_first_hf; hf; hf = hf->next) {
+ /* Only decode UTF-8 values. */
+ if (hf->value && has_suffix(hf->value, "?=\n") &&
+ (! strncasecmp (hf->value, " =?utf8?", 8) ||
+ ! strncasecmp (hf->value, " =?utf-8?", 9))) {
+ /* Looks like an RFC 2047 encoded parameter. */
+ char decoded[PATH_MAX + 1];
+
+ if (decode_rfc2047 (hf->value, decoded, sizeof decoded)) {
+ const size_t len = strlen(decoded);
+
+ /* decode_rfc2047() could truncate if the buffer fills up.
+ Detect and discard if that happened. */
+ if (len < sizeof(decoded) - 1 && strcmp(hf->value, decoded)) {
+ hf->value = mh_xrealloc (hf->value, len + 1);
+ strncpy (hf->value, decoded, len + 1);
+ ++*message_mods;
+ }
+ } else {
+ inform("failed to decode %s parameter %s", hf->name, hf->value);
+ status = NOTOK;
+ }
+ }
+ }
+
+ return status;
+}
+
+
+/*
+ * Factor out common code for loops in fix_filename_encoding().
+ */
+static int
+fix_filename_param (char *name, char *value, PM *first_pm, PM *last_pm)
+{
+ bool fixed = false;
+
+ if (has_prefix(value, "=?") && has_suffix(value, "?=")) {
+ /* Looks like an RFC 2047 encoded parameter. */
+ char decoded[PATH_MAX + 1];
+
+ if (decode_rfc2047 (value, decoded, sizeof decoded)) {
+ /* Encode using RFC 2231. */
+ replace_param (first_pm, last_pm, name, decoded, 0);
+ fixed = true;
+ } else {
+ inform("failed to decode %s parameter %s", name, value);
+ }
+ }
+
+ return fixed;
+}
+
+
+/*
+ * Replace RFC 2047 encoding with RFC 2231 encoding of name and
+ * filename parameters in Content-Type and Content-Disposition
+ * headers, respectively.
+ */
+static int
+fix_filename_encoding (CT ct)
+{
+ PM pm;
+ HF hf;
+ int fixed = 0;
+
+ for (pm = ct->c_ctinfo.ci_first_pm; pm; pm = pm->pm_next) {
+ if (pm->pm_name && pm->pm_value &&
+ strcasecmp (pm->pm_name, "name") == 0) {
+ fixed = fix_filename_param (pm->pm_name, pm->pm_value,
+ &ct->c_ctinfo.ci_first_pm,
+ &ct->c_ctinfo.ci_last_pm);
+ }
+ }
+
+ for (pm = ct->c_dispo_first; pm; pm = pm->pm_next) {
+ if (pm->pm_name && pm->pm_value &&
+ strcasecmp (pm->pm_name, "filename") == 0) {
+ fixed = fix_filename_param (pm->pm_name, pm->pm_value,
+ &ct->c_dispo_first,
+ &ct->c_dispo_last);
+ }
+ }
+
+ /* Fix hf values to correspond. */
+ for (hf = ct->c_first_hf; fixed && hf; hf = hf->next) {
+ enum { OTHER, TYPE_HEADER, DISPO_HEADER } field = OTHER;
+
+ if (strcasecmp (hf->name, TYPE_FIELD) == 0) {
+ field = TYPE_HEADER;
+ } else if (strcasecmp (hf->name, DISPO_FIELD) == 0) {
+ field = DISPO_HEADER;
+ }
+
+ if (field != OTHER) {
+ const char *const semicolon_loc = strchr (hf->value, ';');
+
+ if (semicolon_loc) {
+ const size_t len =
+ strlen (hf->name) + 1 + semicolon_loc - hf->value;
+ const char *const params =
+ output_params (len,
+ field == TYPE_HEADER
+ ? ct->c_ctinfo.ci_first_pm
+ : ct->c_dispo_first,
+ NULL, 0);
+ const char *const new_params = concat (params, "\n", NULL);
+
+ replace_substring (&hf->value, semicolon_loc, new_params);
+ free((void *)new_params); /* Cast away const. Sigh. */
+ free((void *)params);
+ } else {
+ inform("did not find semicolon in %s:%s\n",
+ hf->name, hf->value);
+ }
+ }
+ }
+
+ return OK;
+}
+
+
+/*
+ * Output content in input file to output file.
+ */
+static int
+write_content (CT ct, const char *input_filename, char *outfile, FILE *outfp,
+ int modify_inplace, int message_mods)
+{
int status = OK;
if (modify_inplace) {
if (message_mods > 0) {
- if ((status = output_message (ct, outfile)) == OK) {
+ if ((status = output_message_fp (ct, outfp, outfile)) == OK) {
char *infile = input_filename
- ? add (input_filename, NULL)
- : add (ct->c_file ? ct->c_file : "-", NULL);
+ ? mh_xstrdup (input_filename)
+ : mh_xstrdup (ct->c_file ? ct->c_file : "-");
if (remove_file (infile) == OK) {
if (rename (outfile, infile)) {
int i = -1;
if (old != -1 && new != -1) {
- char buffer[BUFSIZ];
+ char buffer[NMH_BUFSIZ];
while ((i = read (old, buffer, sizeof buffer)) >
0) {
expand filename to absolute path. */
int file = ct->c_file && ct->c_file[0] == '/';
- admonish (NULL, "unable to rename %s %s to %s",
+ inform("unable to rename %s %s to %s, continuing...",
file ? "file" : "message", outfile,
infile);
status = NOTOK;
}
}
} else {
- admonish (NULL, "unable to remove input file %s, "
- "not modifying it", infile);
+ inform("unable to remove input file %s, "
+ "not modifying it, continuing...", infile);
(void) m_unlink (outfile);
status = NOTOK;
}
} else {
/* Output is going to some file. Produce it whether or not
there were modifications. */
- status = output_message (ct, outfile);
+ status = output_message_fp (ct, outfp, outfile);
}
flush_errors ();
}
+/*
+ * parse_mime() does not set lf_line_endings in struct text, so use this
+ * function to do it. It touches the parts the decodetypes identifies.
+ */
+static void
+set_text_ctparams(CT ct, char *decodetypes, int lf_line_endings)
+{
+ switch (ct->c_type) {
+ case CT_MULTIPART: {
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct part *part;
+
+ for (part = m->mp_parts; part; part = part->mp_next) {
+ set_text_ctparams(part->mp_part, decodetypes, lf_line_endings);
+ }
+ break;
+ }
+
+ case CT_MESSAGE:
+ if (ct->c_subtype == MESSAGE_EXTERNAL) {
+ struct exbody *e = (struct exbody *) ct->c_ctparams;
+
+ set_text_ctparams(e->eb_content, decodetypes, lf_line_endings);
+ }
+ break;
+
+ default:
+ if (should_decode(decodetypes, ct->c_ctinfo.ci_type, ct->c_ctinfo.ci_subtype)) {
+ if (ct->c_ctparams == NULL) {
+ ct->c_ctparams = mh_xcalloc(1, sizeof (struct text));
+ }
+ ((struct text *) ct->c_ctparams)->lf_line_endings = lf_line_endings;
+ }
+ }
+}
+
+
/*
* If "rmmproc" is defined, call that to remove the file. Otherwise,
* use the standard MH backup file.
*/
static int
-remove_file (char *file) {
+remove_file (const char *file)
+{
if (rmmproc) {
char *rmm_command = concat (rmmproc, " ", file, NULL);
int status = system (rmm_command);
free (rmm_command);
return WIFEXITED (status) ? WEXITSTATUS (status) : NOTOK;
- } else {
- /* This is OK for a non-message file, it still uses the
- BACKUP_PREFIX form. The backup file will be in the same
- directory as file. */
- return rename (file, m_backup (file));
}
+ /* This is OK for a non-message file, it still uses the
+ BACKUP_PREFIX form. The backup file will be in the same
+ directory as file. */
+ return rename (file, m_backup (file));
}
+/*
+ * Output formatted message to user.
+ */
static void
-report (char *what, char *partno, char *filename, char *message, ...) {
+report (char *what, char *partno, char *filename, char *message, ...)
+{
va_list args;
char *fmt;
if (verbosw) {
va_start (args, message);
fmt = concat (filename, partno ? " part " : ", ",
- partno ? partno : "", partno ? ", " : "", message, NULL);
+ FENDNULL(partno), partno ? ", " : "", message, NULL);
advertise (what, NULL, fmt, args);
projects / nmh / blobdiff