static int init_decoded_content (CT);
static void setup_attach_content(CT, char *);
static char *fgetstr (char *, int, FILE *);
-static int user_content (FILE *, char *, char *, CT *);
+static int user_content (FILE *, char *, CT *);
static void set_id (CT, int);
static int compose_content (CT);
-static int scan_content (CT);
+static int scan_content (CT, size_t);
static int build_headers (CT);
static char *calculate_digest (CT, int);
*/
CT
-build_mime (char *infile, int autobuild, int directives, int header_encoding)
+build_mime (char *infile, int autobuild, int dist, int directives,
+ int header_encoding, size_t maxunencoded)
{
int compnum, state;
char buf[BUFSIZ], name[NAMESZ];
entry = mh_xmalloc(sizeof(*entry));
entry->filename = getcpy(s);
+ entry->next = NULL;
free(vp);
+
if (attach_tail) {
attach_tail->next = entry;
attach_tail = entry;
* Now add the MIME-Version header field
* to the list of header fields.
*/
- np = add (VRSN_FIELD, NULL);
- vp = concat (" ", VRSN_VALUE, "\n", NULL);
- add_header (ct, np, vp);
+
+ if (! dist) {
+ np = add (VRSN_FIELD, NULL);
+ vp = concat (" ", VRSN_VALUE, "\n", NULL);
+ add_header (ct, np, vp);
+ }
/*
* We initally assume we will find multiple contents in the
struct part *part;
CT p;
- if (user_content (in, infile, buf, &p) == DONE) {
+ if (user_content (in, buf, &p) == DONE) {
admonish (NULL, "ignoring spurious #end");
continue;
}
part->mp_part = p;
}
- /*
- * close the composition draft since
- * it's not needed any longer.
- */
- fclose (in);
-
/*
* Add any Attach headers to the list of MIME parts at the end of the
* message.
free(at_prev);
}
- /* check if any contents were found */
- if (!m->mp_parts)
- adios (NULL, "no content directives found");
+ /*
+ * To allow for empty message bodies, if we've found NO content at all
+ * yet cook up an empty text/plain part.
+ */
+
+ if (!m->mp_parts) {
+ CT p;
+ struct part *part;
+ struct text *t;
+
+ if ((p = (CT) calloc (1, sizeof(*p))) == NULL)
+ adios(NULL, "out of memory");
+
+ init_decoded_content(p);
+
+ if (get_ctinfo ("text/plain", p, 0) == NOTOK)
+ done (1);
+
+ p->c_type = CT_TEXT;
+ p->c_subtype = TEXT_PLAIN;
+ p->c_encoding = CE_7BIT;
+ p->c_file = getcpy(infile);
+ /*
+ * Sigh. ce_file contains the "decoded" contents of this part.
+ * So this seems like the best option available since we're going
+ * to call scan_content() on this.
+ */
+ p->c_cefile.ce_file = getcpy("/dev/null");
+ p->c_begin = ftell(in);
+ p->c_end = ftell(in);
+
+ if ((t = (struct text *) calloc (1, sizeof (*t))) == NULL)
+ adios (NULL, "out of memory");
+
+ t->tx_charset = CHARSET_SPECIFIED;
+ p->c_ctparams = t;
+
+ if ((part = (struct part *) calloc (1, sizeof(*part))) == NULL)
+ adios (NULL, "out of memory");
+ *pp = part;
+ pp = &part->mp_next;
+ part->mp_part = p;
+ }
+
+ /*
+ * close the composition draft since
+ * it's not needed any longer.
+ */
+ fclose (in);
/*
* If only one content was found, then remove and
* check if prefix for multipart boundary clashes with
* any of the contents.
*/
- while (scan_content (ct) == NOTOK) {
+ while (scan_content (ct, maxunencoded) == NOTOK) {
if (*cp < 'z') {
(*cp)++;
} else {
}
/* Build the rest of the header field structures */
- build_headers (ct);
+ if (! dist)
+ build_headers (ct);
return ct;
}
*/
static int
-user_content (FILE *in, char *file, char *buf, CT *ctp)
+user_content (FILE *in, char *buf, CT *ctp)
{
int extrnal, vrsn;
char *cp, **ap;
struct part *part;
CT p;
- if (user_content (in, file, buffer, &p) == DONE) {
+ if (user_content (in, buffer, &p) == DONE) {
if (!m->mp_parts)
adios (NULL, "empty \"#begin ... #end\" sequence");
return OK;
*/
static int
-scan_content (CT ct)
+scan_content (CT ct, size_t maxunencoded)
{
int len;
- int check8bit = 0, contains8bit = 0; /* check if contains 8bit data */
- int checklinelen = 0, linelen = 0; /* check for long lines */
+ int check8bit = 0, contains8bit = 0; /* check if contains 8bit data */
+ int checklinelen = 0, linelen = 0; /* check for long lines */
+ int checkllinelen = 0; /* check for extra-long lines */
int checkboundary = 0, boundaryclash = 0; /* check if clashes with multipart boundary */
int checklinespace = 0, linespace = 0; /* check if any line ends with space */
char *cp = NULL, buffer[BUFSIZ];
for (part = m->mp_parts; part; part = part->mp_next) {
CT p = part->mp_part;
- if (scan_content (p) == NOTOK) /* choose encoding for subpart */
+ if (scan_content (p, maxunencoded) == NOTOK) /* choose encoding for subpart */
return NOTOK;
/* if necessary, enlarge encoding for enclosing multipart */
}
/*
- * Decide what to check while scanning this content.
+ * Decide what to check while scanning this content. Note that
+ * for text content we always check for 8bit characters if the
+ * charset is unspecified, because that controls whether or not the
+ * character set is us-ascii or retrieved from the locale.
*/
- switch (ct->c_type) {
- case CT_TEXT:
- check8bit = 1;
+
+ if (ct->c_type == CT_TEXT) {
+ t = (struct text *) ct->c_ctparams;
+ if (t->tx_charset == CHARSET_UNSPECIFIED)
+ check8bit = 1;
+ }
+
+ switch (ct->c_reqencoding) {
+ case CE_8BIT:
+ checkllinelen = 1;
checkboundary = 1;
- if (ct->c_subtype == TEXT_PLAIN) {
- checklinelen = 0;
- checklinespace = 0;
- } else {
+ break;
+ case CE_QUOTED:
+ checkboundary = 1;
+ break;
+ case CE_BASE64:
+ break;
+ case CE_UNKNOWN:
+ /* Use the default rules based on content-type */
+ switch (ct->c_type) {
+ case CT_TEXT:
+ checkboundary = 1;
checklinelen = 1;
- checklinespace = 1;
- }
+ if (ct->c_subtype == TEXT_PLAIN) {
+ checklinespace = 0;
+ } else {
+ checklinespace = 1;
+ }
break;
- case CT_APPLICATION:
- check8bit = 1;
- checklinelen = 1;
- checklinespace = 1;
- checkboundary = 1;
+ case CT_APPLICATION:
+ check8bit = 1;
+ checklinelen = 1;
+ checklinespace = 1;
+ checkboundary = 1;
break;
- case CT_MESSAGE:
- check8bit = 0;
- checklinelen = 0;
- checklinespace = 0;
+ case CT_MESSAGE:
+ check8bit = 0;
+ checklinelen = 0;
+ checklinespace = 0;
- /* don't check anything for message/external */
- if (ct->c_subtype == MESSAGE_EXTERNAL)
- checkboundary = 0;
- else
- checkboundary = 1;
- break;
+ /* don't check anything for message/external */
+ if (ct->c_subtype == MESSAGE_EXTERNAL)
+ checkboundary = 0;
+ else
+ checkboundary = 1;
+ break;
- case CT_AUDIO:
- case CT_IMAGE:
- case CT_VIDEO:
- /*
- * Don't check anything for these types,
- * since we are forcing use of base64.
- */
- check8bit = 0;
- checklinelen = 0;
- checklinespace = 0;
- checkboundary = 0;
- break;
+ case CT_AUDIO:
+ case CT_IMAGE:
+ case CT_VIDEO:
+ /*
+ * Don't check anything for these types,
+ * since we are forcing use of base64, unless
+ * the content-type was specified by a mhbuild directive.
+ */
+ check8bit = 0;
+ checklinelen = 0;
+ checklinespace = 0;
+ checkboundary = 0;
+ break;
+ }
}
/*
* Scan the unencoded content
*/
- if (check8bit || checklinelen || checklinespace || checkboundary) {
+ if (check8bit || checklinelen || checklinespace || checkboundary ||
+ checkllinelen) {
if ((in = fopen (ce->ce_file, "r")) == NULL)
adios (ce->ce_file, "unable to open for reading");
len = strlen (prefix);
/*
* Check line length.
*/
- if (checklinelen && (strlen (buffer) > CPERLIN + 1)) {
+ if (checklinelen && (strlen (buffer) > maxunencoded + 1)) {
linelen = 1;
checklinelen = 0; /* no need to keep checking */
}
+ /*
+ * RFC 5322 specifies that a message cannot contain a line
+ * greater than 998 characters (excluding the CRLF). If we
+ * get one of those lines and linelen is NOT set, then abort.
+ */
+
+ if (checkllinelen && !linelen &&
+ (strlen(buffer) > MAXLONGLINE + 1)) {
+ adios(NULL, "Line in content exceeds maximum line limit (%d)",
+ MAXLONGLINE);
+ }
+
/*
* Check if line ends with a space.
*/
}
/*
- * Decide which transfer encoding to use.
+ * If the content is text and didn't specify a character set,
+ * we need to figure out which one was used.
*/
- switch (ct->c_type) {
- case CT_TEXT:
- /*
- * If the text content didn't specify a character
- * set, we need to figure out which one was used.
- */
+
+ if (ct->c_type == CT_TEXT) {
t = (struct text *) ct->c_ctparams;
if (t->tx_charset == CHARSET_UNSPECIFIED) {
CI ci = &ct->c_ctinfo;
*cp++ = '\0';
*ep = cp;
}
+ }
- if (contains8bit || linelen || linespace || checksw)
- ct->c_encoding = CE_QUOTED;
- else
- ct->c_encoding = CE_7BIT;
- break;
+ /*
+ * Decide which transfer encoding to use.
+ */
- case CT_APPLICATION:
- /* For application type, use base64, except when postscript */
- if (contains8bit || linelen || linespace || checksw)
- ct->c_encoding = (ct->c_subtype == APPLICATION_POSTSCRIPT)
- ? CE_QUOTED : CE_BASE64;
- else
- ct->c_encoding = CE_7BIT;
- break;
+ if (ct->c_reqencoding != CE_UNKNOWN)
+ ct->c_encoding = ct->c_reqencoding;
+ else
+ switch (ct->c_type) {
+ case CT_TEXT:
+ if (contains8bit && !linelen && !linespace && !checksw)
+ ct->c_encoding = CE_8BIT;
+ else if (contains8bit || linelen || linespace || checksw)
+ ct->c_encoding = CE_QUOTED;
+ else
+ ct->c_encoding = CE_7BIT;
+ break;
- case CT_MESSAGE:
- ct->c_encoding = CE_7BIT;
- break;
+ case CT_APPLICATION:
+ /* For application type, use base64, except when postscript */
+ if (contains8bit || linelen || linespace || checksw)
+ ct->c_encoding = (ct->c_subtype == APPLICATION_POSTSCRIPT)
+ ? CE_QUOTED : CE_BASE64;
+ else
+ ct->c_encoding = CE_7BIT;
+ break;
- case CT_AUDIO:
- case CT_IMAGE:
- case CT_VIDEO:
- /* For audio, image, and video contents, just use base64 */
- ct->c_encoding = CE_BASE64;
- break;
- }
+ case CT_MESSAGE:
+ ct->c_encoding = CE_7BIT;
+ break;
+
+ case CT_AUDIO:
+ case CT_IMAGE:
+ case CT_VIDEO:
+ /* For audio, image, and video contents, just use base64 */
+ ct->c_encoding = CE_BASE64;
+ break;
+ }
return (boundaryclash ? NOTOK : OK);
}
projects / nmh / blobdiff