/*
* mhbuildsbr.c -- routines to expand/translate MIME composition files
*
* $Id: mhbuildsbr.c,v 1.9 2003/09/30 16:58:43 gbburkhardt Exp $
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
/*
* This code was originally part of mhn.c. I split it into
* a separate program (mhbuild.c) and then later split it
* again (mhbuildsbr.c). But the code still has some of
* the mhn.c code in it. This program needs additional
* streamlining and removal of unneeded code.
*/
#include <h/mh.h>
#include <fcntl.h>
#include <h/signals.h>
#include <h/md5.h>
#include <errno.h>
#include <signal.h>
#include <h/mts.h>
#include <h/tws.h>
#include <h/mime.h>
#include <h/mhparse.h>
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef TM_IN_SYS_TIME
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
extern int debugsw;
extern int verbosw;
extern int ebcdicsw;
extern int listsw;
extern int rfc934sw;
extern int endian; /* mhmisc.c */
/* cache policies */
extern int rcachesw; /* mhcachesbr.c */
extern int wcachesw; /* mhcachesbr.c */
int checksw = 0; /* Add Content-MD5 field */
/*
* Directory to place tmp files. This must
* be set before these routines are called.
*/
char *tmp;
pid_t xpid = 0;
static char prefix[] = "----- =_aaaaaaaaaa";
/*
* Structure for mapping types to their internal flags
*/
struct k2v {
char *kv_key;
int kv_value;
};
/*
* Structures for TEXT messages
*/
static struct k2v SubText[] = {
{ "plain", TEXT_PLAIN },
{ "richtext", TEXT_RICHTEXT }, /* defined in RFC-1341 */
{ "enriched", TEXT_ENRICHED }, /* defined in RFC-1896 */
{ NULL, TEXT_UNKNOWN } /* this one must be last! */
};
static struct k2v Charset[] = {
{ "us-ascii", CHARSET_USASCII },
{ "iso-8859-1", CHARSET_LATIN },
{ NULL, CHARSET_UNKNOWN } /* this one must be last! */
};
/*
* Structures for MULTIPART messages
*/
static struct k2v SubMultiPart[] = {
{ "mixed", MULTI_MIXED },
{ "alternative", MULTI_ALTERNATE },
{ "digest", MULTI_DIGEST },
{ "parallel", MULTI_PARALLEL },
{ NULL, MULTI_UNKNOWN } /* this one must be last! */
};
/*
* Structures for MESSAGE messages
*/
static struct k2v SubMessage[] = {
{ "rfc822", MESSAGE_RFC822 },
{ "partial", MESSAGE_PARTIAL },
{ "external-body", MESSAGE_EXTERNAL },
{ NULL, MESSAGE_UNKNOWN } /* this one must be last! */
};
/*
* Structure for APPLICATION messages
*/
static struct k2v SubApplication[] = {
{ "octet-stream", APPLICATION_OCTETS },
{ "postscript", APPLICATION_POSTSCRIPT },
{ NULL, APPLICATION_UNKNOWN } /* this one must be last! */
};
/* mhmisc.c */
int make_intermediates (char *);
void content_error (char *, CT, char *, ...);
/* mhcachesbr.c */
int find_cache (CT, int, int *, char *, char *, int);
/* ftpsbr.c */
int ftp_get (char *, char *, char *, char *, char *, char *, int, int);
/* mhfree.c */
void free_content (CT);
void free_ctinfo (CT);
void free_encoding (CT, int);
/*
* prototypes
*/
CT build_mime (char *);
int pidcheck (int);
/*
* static prototypes
*/
static CT get_content (FILE *, char *, int);
static int add_header (CT, char *, char *);
static int get_ctinfo (char *, CT, int);
static int get_comment (CT, char **, int);
static int InitGeneric (CT);
static int InitText (CT);
static int InitMultiPart (CT);
static void reverse_parts (CT);
static int InitMessage (CT);
static int params_external (CT, int);
static int InitApplication (CT);
static int init_decoded_content (CT);
static int init_encoding (CT, OpenCEFunc);
static void close_encoding (CT);
static unsigned long size_encoding (CT);
static int InitBase64 (CT);
static int openBase64 (CT, char **);
static int InitQuoted (CT);
static int openQuoted (CT, char **);
static int Init7Bit (CT);
static int open7Bit (CT, char **);
static int openExternal (CT, CT, CE, char **, int *);
static int InitFile (CT);
static int openFile (CT, char **);
static int InitFTP (CT);
static int openFTP (CT, char **);
static int InitMail (CT);
static int openMail (CT, char **);
static char *fgetstr (char *, int, FILE *);
static int user_content (FILE *, char *, char *, CT *);
static void set_id (CT, int);
static int compose_content (CT);
static int scan_content (CT);
static int build_headers (CT);
static char *calculate_digest (CT, int);
static int readDigest (CT, char *);
/*
* Structures for mapping (content) types to
* the functions to handle them.
*/
struct str2init {
char *si_key;
int si_val;
InitFunc si_init;
};
static struct str2init str2cts[] = {
{ "application", CT_APPLICATION, InitApplication },
{ "audio", CT_AUDIO, InitGeneric },
{ "image", CT_IMAGE, InitGeneric },
{ "message", CT_MESSAGE, InitMessage },
{ "multipart", CT_MULTIPART, InitMultiPart },
{ "text", CT_TEXT, InitText },
{ "video", CT_VIDEO, InitGeneric },
{ NULL, CT_EXTENSION, NULL }, /* these two must be last! */
{ NULL, CT_UNKNOWN, NULL },
};
static struct str2init str2ces[] = {
{ "base64", CE_BASE64, InitBase64 },
{ "quoted-printable", CE_QUOTED, InitQuoted },
{ "8bit", CE_8BIT, Init7Bit },
{ "7bit", CE_7BIT, Init7Bit },
{ "binary", CE_BINARY, NULL },
{ NULL, CE_EXTENSION, NULL }, /* these two must be last! */
{ NULL, CE_UNKNOWN, NULL },
};
/*
* NOTE WELL: si_key MUST NOT have value of NOTOK
*
* si_key is 1 if access method is anonymous.
*/
static struct str2init str2methods[] = {
{ "afs", 1, InitFile },
{ "anon-ftp", 1, InitFTP },
{ "ftp", 0, InitFTP },
{ "local-file", 0, InitFile },
{ "mail-server", 0, InitMail },
{ NULL, 0, NULL }
};
int
pidcheck (int status)
{
if ((status & 0xff00) == 0xff00 || (status & 0x007f) != SIGQUIT)
return status;
fflush (stdout);
fflush (stderr);
return done (1);
}
/*
* Main routine for translating composition file
* into valid MIME message. It translates the draft
* into a content structure (actually a tree of content
* structures). This message then can be manipulated
* in various ways, including being output via
* output_message().
*/
CT
build_mime (char *infile)
{
int compnum, state;
char buf[BUFSIZ], name[NAMESZ];
char *cp, *np, *vp;
struct multipart *m;
struct part **pp;
CT ct;
FILE *in;
umask (~m_gmprot ());
/* open the composition draft */
if ((in = fopen (infile, "r")) == NULL)
adios (infile, "unable to open for reading");
/*
* Allocate space for primary (outside) content
*/
if ((ct = (CT) calloc (1, sizeof(*ct))) == NULL)
adios (NULL, "out of memory");
/*
* Allocate structure for handling decoded content
* for this part. We don't really need this, but
* allocate it to remain consistent.
*/
init_decoded_content (ct);
/*
* Parse some of the header fields in the composition
* draft into the linked list of header fields for
* the new MIME message.
*/
for (compnum = 1, state = FLD;;) {
switch (state = m_getfld (state, name, buf, sizeof(buf), in)) {
case FLD:
case FLDPLUS:
case FLDEOF:
compnum++;
/* abort if draft has Mime-Version header field */
if (!strcasecmp (name, VRSN_FIELD))
adios (NULL, "draft shouldn't contain %s: field", VRSN_FIELD);
/* abort if draft has Content-Transfer-Encoding header field */
if (!strcasecmp (name, ENCODING_FIELD))
adios (NULL, "draft shouldn't contain %s: field", ENCODING_FIELD);
/* ignore any Content-Type fields in the header */
if (!strcasecmp (name, TYPE_FIELD)) {
while (state == FLDPLUS)
state = m_getfld (state, name, buf, sizeof(buf), in);
goto finish_field;
}
/* get copies of the buffers */
np = add (name, NULL);
vp = add (buf, NULL);
/* if necessary, get rest of field */
while (state == FLDPLUS) {
state = m_getfld (state, name, buf, sizeof(buf), in);
vp = add (buf, vp); /* add to previous value */
}
/* Now add the header data to the list */
add_header (ct, np, vp);
finish_field:
/* if this wasn't the last header field, then continue */
if (state != FLDEOF)
continue;
/* else fall... */
case FILEEOF:
adios (NULL, "draft has empty body -- no directives!");
/* NOTREACHED */
case BODY:
case BODYEOF:
fseek (in, (long) (-strlen (buf)), SEEK_CUR);
break;
case LENERR:
case FMTERR:
adios (NULL, "message format error in component #%d", compnum);
default:
adios (NULL, "getfld() returned %d", state);
}
break;
}
/*
* 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);
/*
* We initally assume we will find multiple contents in the
* draft. So create a multipart/mixed content to hold everything.
* We can remove this later, if it is not needed.
*/
if (get_ctinfo ("multipart/mixed", ct, 0) == NOTOK)
done (1);
ct->c_type = CT_MULTIPART;
ct->c_subtype = MULTI_MIXED;
ct->c_file = add (infile, NULL);
if ((m = (struct multipart *) calloc (1, sizeof(*m))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) m;
pp = &m->mp_parts;
/*
* read and parse the composition file
* and the directives it contains.
*/
while (fgetstr (buf, sizeof(buf) - 1, in)) {
struct part *part;
CT p;
if (user_content (in, infile, buf, &p) == DONE) {
admonish (NULL, "ignoring spurious #end");
continue;
}
if (!p)
continue;
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);
/* check if any contents were found */
if (!m->mp_parts)
adios (NULL, "no content directives found");
/*
* If only one content was found, then remove and
* free the outer multipart content.
*/
if (!m->mp_parts->mp_next) {
CT p;
p = m->mp_parts->mp_part;
m->mp_parts->mp_part = NULL;
/* move header fields */
p->c_first_hf = ct->c_first_hf;
p->c_last_hf = ct->c_last_hf;
ct->c_first_hf = NULL;
ct->c_last_hf = NULL;
free_content (ct);
ct = p;
} else {
set_id (ct, 1);
}
/*
* Fill out, or expand directives. Parse and execute
* commands specified by profile composition strings.
*/
compose_content (ct);
if ((cp = strchr(prefix, 'a')) == NULL)
adios (NULL, "internal error(4)");
/*
* Scan the contents. Choose a transfer encoding, and
* check if prefix for multipart boundary clashes with
* any of the contents.
*/
while (scan_content (ct) == NOTOK) {
if (*cp < 'z') {
(*cp)++;
} else {
if (*++cp == 0)
adios (NULL, "giving up trying to find a unique delimiter string");
else
(*cp)++;
}
}
/* Build the rest of the header field structures */
build_headers (ct);
return ct;
}
/*
* Main routine for reading/parsing the headers
* of a message content.
*
* toplevel = 1 # we are at the top level of the message
* toplevel = 0 # we are inside message type or multipart type
* # other than multipart/digest
* toplevel = -1 # we are inside multipart/digest
*/
static CT
get_content (FILE *in, char *file, int toplevel)
{
int compnum, state;
char buf[BUFSIZ], name[NAMESZ];
CT ct;
if (!(ct = (CT) calloc (1, sizeof(*ct))))
adios (NULL, "out of memory");
ct->c_fp = in;
ct->c_file = add (file, NULL);
ct->c_begin = ftell (ct->c_fp) + 1;
/*
* Read the content headers
*/
for (compnum = 1, state = FLD;;) {
switch (state = m_getfld (state, name, buf, sizeof(buf), in)) {
case FLD:
case FLDPLUS:
case FLDEOF:
compnum++;
/* Get MIME-Version field */
if (!strcasecmp (name, VRSN_FIELD)) {
int ucmp;
char c, *cp, *dp;
cp = add (buf, NULL);
while (state == FLDPLUS) {
state = m_getfld (state, name, buf, sizeof(buf), in);
cp = add (buf, cp);
}
if (ct->c_vrsn) {
advise (NULL, "message %s has multiple %s: fields (%s)",
ct->c_file, VRSN_FIELD, dp = trimcpy (cp));
free (dp);
free (cp);
goto out;
}
ct->c_vrsn = cp;
while (isspace (*cp))
cp++;
for (dp = strchr(cp, '\n'); dp; dp = strchr(dp, '\n'))
*dp++ = ' ';
for (dp = cp + strlen (cp) - 1; dp >= cp; dp--)
if (!isspace (*dp))
break;
*++dp = '\0';
if (debugsw)
fprintf (stderr, "%s: %s\n", VRSN_FIELD, cp);
if (*cp == '(' && get_comment (ct, &cp, 0) == NOTOK)
goto out;
for (dp = cp; istoken (*dp); dp++)
continue;
c = *dp, *dp = '\0';
ucmp = !strcasecmp (cp, VRSN_VALUE);
*dp = c;
if (!ucmp)
admonish (NULL,
"message %s has unknown value for %s: field (%s)",
ct->c_file, VRSN_FIELD, cp);
goto got_header;
}
/* Get Content-Type field */
if (!strcasecmp (name, TYPE_FIELD)) {
char *cp;
struct str2init *s2i;
CI ci = &ct->c_ctinfo;
cp = add (buf, NULL);
while (state == FLDPLUS) {
state = m_getfld (state, name, buf, sizeof(buf), in);
cp = add (buf, cp);
}
/* Check if we've already seen a Content-Type header */
if (ct->c_ctline) {
char *dp = trimcpy (cp);
advise (NULL, "message %s has multiple %s: fields (%s)",
ct->c_file, TYPE_FIELD, dp);
free (dp);
free (cp);
goto out;
}
/* Parse the Content-Type field */
if (get_ctinfo (cp, ct, 0) == NOTOK)
goto out;
/*
* Set the Init function and the internal
* flag for this content type.
*/
for (s2i = str2cts; s2i->si_key; s2i++)
if (!strcasecmp (ci->ci_type, s2i->si_key))
break;
if (!s2i->si_key && !uprf (ci->ci_type, "X-"))
s2i++;
ct->c_type = s2i->si_val;
ct->c_ctinitfnx = s2i->si_init;
goto got_header;
}
/* Get Content-Transfer-Encoding field */
if (!strcasecmp (name, ENCODING_FIELD)) {
char *cp, *dp;
char c;
struct str2init *s2i;
cp = add (buf, NULL);
while (state == FLDPLUS) {
state = m_getfld (state, name, buf, sizeof(buf), in);
cp = add (buf, cp);
}
/*
* Check if we've already seen the
* Content-Transfer-Encoding field
*/
if (ct->c_celine) {
advise (NULL, "message %s has multiple %s: fields (%s)",
ct->c_file, ENCODING_FIELD, dp = trimcpy (cp));
free (dp);
free (cp);
goto out;
}
ct->c_celine = cp; /* Save copy of this field */
while (isspace (*cp))
cp++;
for (dp = cp; istoken (*dp); dp++)
continue;
c = *dp;
*dp = '\0';
/*
* Find the internal flag and Init function
* for this transfer encoding.
*/
for (s2i = str2ces; s2i->si_key; s2i++)
if (!strcasecmp (cp, s2i->si_key))
break;
if (!s2i->si_key && !uprf (cp, "X-"))
s2i++;
*dp = c;
ct->c_encoding = s2i->si_val;
/* Call the Init function for this encoding */
if (s2i->si_init && (*s2i->si_init) (ct) == NOTOK)
goto out;
goto got_header;
}
/* Get Content-ID field */
if (!strcasecmp (name, ID_FIELD)) {
ct->c_id = add (buf, ct->c_id);
while (state == FLDPLUS) {
state = m_getfld (state, name, buf, sizeof(buf), in);
ct->c_id = add (buf, ct->c_id);
}
goto got_header;
}
/* Get Content-Description field */
if (!strcasecmp (name, DESCR_FIELD)) {
ct->c_descr = add (buf, ct->c_descr);
while (state == FLDPLUS) {
state = m_getfld (state, name, buf, sizeof(buf), in);
ct->c_descr = add (buf, ct->c_descr);
}
goto got_header;
}
/* Get Content-MD5 field */
if (!strcasecmp (name, MD5_FIELD)) {
char *cp, *dp, *ep;
cp = add (buf, NULL);
while (state == FLDPLUS) {
state = m_getfld (state, name, buf, sizeof(buf), in);
cp = add (buf, cp);
}
if (!checksw) {
free (cp);
goto got_header;
}
if (ct->c_digested) {
advise (NULL, "message %s has multiple %s: fields (%s)",
ct->c_file, MD5_FIELD, dp = trimcpy (cp));
free (dp);
free (cp);
goto out;
}
ep = cp;
while (isspace (*cp))
cp++;
for (dp = strchr(cp, '\n'); dp; dp = strchr(dp, '\n'))
*dp++ = ' ';
for (dp = cp + strlen (cp) - 1; dp >= cp; dp--)
if (!isspace (*dp))
break;
*++dp = '\0';
if (debugsw)
fprintf (stderr, "%s: %s\n", MD5_FIELD, cp);
if (*cp == '(' && get_comment (ct, &cp, 0) == NOTOK) {
free (ep);
goto out;
}
for (dp = cp; *dp && !isspace (*dp); dp++)
continue;
*dp = '\0';
readDigest (ct, cp);
free (ep);
ct->c_digested++;
goto got_header;
}
#if 0
if (uprf (name, XXX_FIELD_PRF))
advise (NULL, "unknown field (%s) in message %s",
name, ct->c_file);
/* and fall... */
#endif
while (state == FLDPLUS)
state = m_getfld (state, name, buf, sizeof(buf), in);
got_header:
if (state != FLDEOF) {
ct->c_begin = ftell (in) + 1;
continue;
}
/* else fall... */
case BODY:
case BODYEOF:
ct->c_begin = ftell (in) - strlen (buf);
break;
case FILEEOF:
ct->c_begin = ftell (in);
break;
case LENERR:
case FMTERR:
adios (NULL, "message format error in component #%d", compnum);
default:
adios (NULL, "getfld() returned %d", state);
}
break;
}
/*
* Check if we saw a Content-Type field.
* If not, then assign a default value for
* it, and the Init function.
*/
if (!ct->c_ctline) {
/*
* If we are inside a multipart/digest message,
* so default type is message/rfc822
*/
if (toplevel < 0) {
if (get_ctinfo ("message/rfc822", ct, 0) == NOTOK)
goto out;
ct->c_type = CT_MESSAGE;
ct->c_ctinitfnx = InitMessage;
} else {
/*
* Else default type is text/plain
*/
if (get_ctinfo ("text/plain", ct, 0) == NOTOK)
goto out;
ct->c_type = CT_TEXT;
ct->c_ctinitfnx = InitText;
}
}
/* Use default Transfer-Encoding, if necessary */
if (!ct->c_celine) {
ct->c_encoding = CE_7BIT;
Init7Bit (ct);
}
return ct;
out:
free_content (ct);
return NULL;
}
/*
* small routine to add header field to list
*/
static int
add_header (CT ct, char *name, char *value)
{
HF hp;
/* allocate header field structure */
if (!(hp = malloc (sizeof(*hp))))
adios (NULL, "out of memory");
/* link data into header structure */
hp->name = name;
hp->value = value;
hp->next = NULL;
/* link header structure into the list */
if (ct->c_first_hf == NULL) {
ct->c_first_hf = hp; /* this is the first */
ct->c_last_hf = hp;
} else {
ct->c_last_hf->next = hp; /* add it to the end */
ct->c_last_hf = hp;
}
return 0;
}
/*
* Used to parse both:
* 1) Content-Type line
* 2) composition directives
*
* and fills in the information of the CTinfo structure.
*/
static int
get_ctinfo (char *cp, CT ct, int magic)
{
int i;
char *dp, **ap, **ep;
char c;
CI ci;
ci = &ct->c_ctinfo;
i = strlen (invo_name) + 2;
/* store copy of Content-Type line */
cp = ct->c_ctline = add (cp, NULL);
while (isspace (*cp)) /* trim leading spaces */
cp++;
/* change newlines to spaces */
for (dp = strchr(cp, '\n'); dp; dp = strchr(dp, '\n'))
*dp++ = ' ';
/* trim trailing spaces */
for (dp = cp + strlen (cp) - 1; dp >= cp; dp--)
if (!isspace (*dp))
break;
*++dp = '\0';
if (debugsw)
fprintf (stderr, "%s: %s\n", TYPE_FIELD, cp);
if (*cp == '(' && get_comment (ct, &cp, 1) == NOTOK)
return NOTOK;
for (dp = cp; istoken (*dp); dp++)
continue;
c = *dp, *dp = '\0';
ci->ci_type = add (cp, NULL); /* store content type */
*dp = c, cp = dp;
if (!*ci->ci_type) {
advise (NULL, "invalid %s: field in message %s (empty type)",
TYPE_FIELD, ct->c_file);
return NOTOK;
}
/* down case the content type string */
for (dp = ci->ci_type; *dp; dp++)
if (isalpha(*dp) && isupper (*dp))
*dp = tolower (*dp);
while (isspace (*cp))
cp++;
if (*cp == '(' && get_comment (ct, &cp, 1) == NOTOK)
return NOTOK;
if (*cp != '/') {
if (!magic)
ci->ci_subtype = add ("", NULL);
goto magic_skip;
}
cp++;
while (isspace (*cp))
cp++;
if (*cp == '(' && get_comment (ct, &cp, 1) == NOTOK)
return NOTOK;
for (dp = cp; istoken (*dp); dp++)
continue;
c = *dp, *dp = '\0';
ci->ci_subtype = add (cp, NULL); /* store the content subtype */
*dp = c, cp = dp;
if (!*ci->ci_subtype) {
advise (NULL,
"invalid %s: field in message %s (empty subtype for \"%s\")",
TYPE_FIELD, ct->c_file, ci->ci_type);
return NOTOK;
}
/* down case the content subtype string */
for (dp = ci->ci_subtype; *dp; dp++)
if (isalpha(*dp) && isupper (*dp))
*dp = tolower (*dp);
magic_skip:
while (isspace (*cp))
cp++;
if (*cp == '(' && get_comment (ct, &cp, 1) == NOTOK)
return NOTOK;
/*
* Parse attribute/value pairs given with Content-Type
*/
ep = (ap = ci->ci_attrs) + NPARMS;
while (*cp == ';') {
char *vp, *up;
if (ap >= ep) {
advise (NULL,
"too many parameters in message %s's %s: field (%d max)",
ct->c_file, TYPE_FIELD, NPARMS);
return NOTOK;
}
cp++;
while (isspace (*cp))
cp++;
if (*cp == '(' && get_comment (ct, &cp, 1) == NOTOK)
return NOTOK;
if (*cp == 0) {
advise (NULL,
"extraneous trailing ';' in message %s's %s: parameter list",
ct->c_file, TYPE_FIELD);
return OK;
}
/* down case the attribute name */
for (dp = cp; istoken (*dp); dp++)
if (isalpha(*dp) && isupper (*dp))
*dp = tolower (*dp);
for (up = dp; isspace (*dp); )
dp++;
if (dp == cp || *dp != '=') {
advise (NULL,
"invalid parameter in message %s's %s: field\n%*.*sparameter %s (error detected at offset %d)",
ct->c_file, TYPE_FIELD, i, i, "", cp, dp - cp);
return NOTOK;
}
vp = (*ap = add (cp, NULL)) + (up - cp);
*vp = '\0';
for (dp++; isspace (*dp); )
dp++;
/* now add the attribute value */
ci->ci_values[ap - ci->ci_attrs] = vp = *ap + (dp - cp);
if (*dp == '"') {
for (cp = ++dp, dp = vp;;) {
switch (c = *cp++) {
case '\0':
bad_quote:
advise (NULL,
"invalid quoted-string in message %s's %s: field\n%*.*s(parameter %s)",
ct->c_file, TYPE_FIELD, i, i, "", *ap);
return NOTOK;
case '\\':
*dp++ = c;
if ((c = *cp++) == '\0')
goto bad_quote;
/* else fall... */
default:
*dp++ = c;
continue;
case '"':
*dp = '\0';
break;
}
break;
}
} else {
for (cp = dp, dp = vp; istoken (*cp); cp++, dp++)
continue;
*dp = '\0';
}
if (!*vp) {
advise (NULL,
"invalid parameter in message %s's %s: field\n%*.*s(parameter %s)",
ct->c_file, TYPE_FIELD, i, i, "", *ap);
return NOTOK;
}
ap++;
while (isspace (*cp))
cp++;
if (*cp == '(' && get_comment (ct, &cp, 1) == NOTOK)
return NOTOK;
}
/*
* Get any <Content-Id> given in buffer
*/
if (magic && *cp == '<') {
if (ct->c_id) {
free (ct->c_id);
ct->c_id = NULL;
}
if (!(dp = strchr(ct->c_id = ++cp, '>'))) {
advise (NULL, "invalid ID in message %s", ct->c_file);
return NOTOK;
}
c = *dp;
*dp = '\0';
if (*ct->c_id)
ct->c_id = concat ("<", ct->c_id, ">\n", NULL);
else
ct->c_id = NULL;
*dp++ = c;
cp = dp;
while (isspace (*cp))
cp++;
}
/*
* Get any [Content-Description] given in buffer.
*/
if (magic && *cp == '[') {
ct->c_descr = ++cp;
for (dp = cp + strlen (cp) - 1; dp >= cp; dp--)
if (*dp == ']')
break;
if (dp < cp) {
advise (NULL, "invalid description in message %s", ct->c_file);
ct->c_descr = NULL;
return NOTOK;
}
c = *dp;
*dp = '\0';
if (*ct->c_descr)
ct->c_descr = concat (ct->c_descr, "\n", NULL);
else
ct->c_descr = NULL;
*dp++ = c;
cp = dp;
while (isspace (*cp))
cp++;
}
/*
* Check if anything is left over
*/
if (*cp) {
if (magic)
ci->ci_magic = add (cp, NULL);
else
advise (NULL,
"extraneous information in message %s's %s: field\n%*.*s(%s)",
ct->c_file, TYPE_FIELD, i, i, "", cp);
}
return OK;
}
static int
get_comment (CT ct, char **ap, int istype)
{
int i;
char *bp, *cp;
char c, buffer[BUFSIZ], *dp;
CI ci;
ci = &ct->c_ctinfo;
cp = *ap;
bp = buffer;
cp++;
for (i = 0;;) {
switch (c = *cp++) {
case '\0':
invalid:
advise (NULL, "invalid comment in message %s's %s: field",
ct->c_file, istype ? TYPE_FIELD : VRSN_FIELD);
return NOTOK;
case '\\':
*bp++ = c;
if ((c = *cp++) == '\0')
goto invalid;
*bp++ = c;
continue;
case '(':
i++;
/* and fall... */
default:
*bp++ = c;
continue;
case ')':
if (--i < 0)
break;
*bp++ = c;
continue;
}
break;
}
*bp = '\0';
if (istype) {
if ((dp = ci->ci_comment)) {
ci->ci_comment = concat (dp, " ", buffer, NULL);
free (dp);
} else {
ci->ci_comment = add (buffer, NULL);
}
}
while (isspace (*cp))
cp++;
*ap = cp;
return OK;
}
/*
* CONTENTS
*
* Handles content types audio, image, and video.
* There's not much to do right here.
*/
static int
InitGeneric (CT ct)
{
return OK; /* not much to do here */
}
/*
* TEXT
*/
static int
InitText (CT ct)
{
char **ap, **ep;
struct k2v *kv;
struct text *t;
CI ci = &ct->c_ctinfo;
/* check for missing subtype */
if (!*ci->ci_subtype)
ci->ci_subtype = add ("plain", ci->ci_subtype);
/* match subtype */
for (kv = SubText; kv->kv_key; kv++)
if (!strcasecmp (ci->ci_subtype, kv->kv_key))
break;
ct->c_subtype = kv->kv_value;
/* allocate text character set structure */
if ((t = (struct text *) calloc (1, sizeof(*t))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) t;
/* initially mark character set as unspecified */
t->tx_charset = CHARSET_UNSPECIFIED;
/* scan for charset parameter */
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++)
if (!strcasecmp (*ap, "charset"))
break;
/* check if content specified a character set */
if (*ap) {
/* match character set or set to CHARSET_UNKNOWN */
for (kv = Charset; kv->kv_key; kv++)
if (!strcasecmp (*ep, kv->kv_key))
break;
t->tx_charset = kv->kv_value;
}
return OK;
}
/*
* MULTIPART
*/
static int
InitMultiPart (CT ct)
{
int inout;
long last, pos;
char *cp, *dp, **ap, **ep;
char *bp, buffer[BUFSIZ];
struct multipart *m;
struct k2v *kv;
struct part *part, **next;
CI ci = &ct->c_ctinfo;
CT p;
FILE *fp;
/*
* The encoding for multipart messages must be either
* 7bit, 8bit, or binary (per RFC2045).
*/
if (ct->c_encoding != CE_7BIT && ct->c_encoding != CE_8BIT
&& ct->c_encoding != CE_BINARY) {
admonish (NULL,
"\"%s/%s\" type in message %s must be encoded in 7bit, 8bit, or binary",
ci->ci_type, ci->ci_subtype, ct->c_file);
return NOTOK;
}
/* match subtype */
for (kv = SubMultiPart; kv->kv_key; kv++)
if (!strcasecmp (ci->ci_subtype, kv->kv_key))
break;
ct->c_subtype = kv->kv_value;
/*
* Check for "boundary" parameter, which is
* required for multipart messages.
*/
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
if (!strcasecmp (*ap, "boundary")) {
bp = *ep;
break;
}
}
/* complain if boundary parameter is missing */
if (!*ap) {
advise (NULL,
"a \"boundary\" parameter is mandatory for \"%s/%s\" type in message %s's %s: field",
ci->ci_type, ci->ci_subtype, ct->c_file, TYPE_FIELD);
return NOTOK;
}
/* allocate primary structure for multipart info */
if ((m = (struct multipart *) calloc (1, sizeof(*m))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) m;
/* check if boundary parameter contains only whitespace characters */
for (cp = bp; isspace (*cp); cp++)
continue;
if (!*cp) {
advise (NULL, "invalid \"boundary\" parameter for \"%s/%s\" type in message %s's %s: field",
ci->ci_type, ci->ci_subtype, ct->c_file, TYPE_FIELD);
return NOTOK;
}
/* remove trailing whitespace from boundary parameter */
for (cp = bp, dp = cp + strlen (cp) - 1; dp > cp; dp--)
if (!isspace (*dp))
break;
*++dp = '\0';
/* record boundary separators */
m->mp_start = concat (bp, "\n", NULL);
m->mp_stop = concat (bp, "--\n", NULL);
if (!ct->c_fp && (ct->c_fp = fopen (ct->c_file, "r")) == NULL) {
advise (ct->c_file, "unable to open for reading");
return NOTOK;
}
fseek (fp = ct->c_fp, pos = ct->c_begin, SEEK_SET);
last = ct->c_end;
next = &m->mp_parts;
part = NULL;
inout = 1;
while (fgets (buffer, sizeof(buffer) - 1, fp)) {
if (pos > last)
break;
pos += strlen (buffer);
if (buffer[0] != '-' || buffer[1] != '-')
continue;
if (inout) {
if (strcmp (buffer + 2, m->mp_start))
continue;
next_part:
if ((part = (struct part *) calloc (1, sizeof(*part))) == NULL)
adios (NULL, "out of memory");
*next = part;
next = &part->mp_next;
if (!(p = get_content (fp, ct->c_file,
rfc934sw && ct->c_subtype == MULTI_DIGEST ? -1 : 0))) {
fclose (ct->c_fp);
ct->c_fp = NULL;
return NOTOK;
}
p->c_fp = NULL;
part->mp_part = p;
pos = p->c_begin;
fseek (fp, pos, SEEK_SET);
inout = 0;
} else {
if (strcmp (buffer + 2, m->mp_start) == 0) {
inout = 1;
end_part:
p = part->mp_part;
p->c_end = ftell(fp) - (strlen(buffer) + 1);
if (p->c_end < p->c_begin)
p->c_begin = p->c_end;
if (inout)
goto next_part;
goto last_part;
} else {
if (strcmp (buffer + 2, m->mp_stop) == 0)
goto end_part;
}
}
}
advise (NULL, "bogus multipart content in message %s", ct->c_file);
if (!inout && part) {
p = part->mp_part;
p->c_end = ct->c_end;
if (p->c_begin >= p->c_end) {
for (next = &m->mp_parts; *next != part;
next = &((*next)->mp_next))
continue;
*next = NULL;
free_content (p);
free ((char *) part);
}
}
last_part:
/* reverse the order of the parts for multipart/alternative */
if (ct->c_subtype == MULTI_ALTERNATE)
reverse_parts (ct);
/*
* label all subparts with part number, and
* then initialize the content of the subpart.
*/
{
int partnum;
char *pp;
char partnam[BUFSIZ];
if (ct->c_partno) {
snprintf (partnam, sizeof(partnam), "%s.", ct->c_partno);
pp = partnam + strlen (partnam);
} else {
pp = partnam;
}
for (part = m->mp_parts, partnum = 1; part;
part = part->mp_next, partnum++) {
p = part->mp_part;
sprintf (pp, "%d", partnum);
p->c_partno = add (partnam, NULL);
/* initialize the content of the subparts */
if (p->c_ctinitfnx && (*p->c_ctinitfnx) (p) == NOTOK) {
fclose (ct->c_fp);
ct->c_fp = NULL;
return NOTOK;
}
}
}
fclose (ct->c_fp);
ct->c_fp = NULL;
return OK;
}
/*
* reverse the order of the parts of a multipart
*/
static void
reverse_parts (CT ct)
{
int i;
struct multipart *m;
struct part **base, **bmp, **next, *part;
m = (struct multipart *) ct->c_ctparams;
/* if only one part, just return */
if (!m->mp_parts || !m->mp_parts->mp_next)
return;
/* count number of parts */
i = 0;
for (part = m->mp_parts; part; part = part->mp_next)
i++;
/* allocate array of pointers to the parts */
if (!(base = (struct part **) calloc ((size_t) (i + 1), sizeof(*base))))
adios (NULL, "out of memory");
bmp = base;
/* point at all the parts */
for (part = m->mp_parts; part; part = part->mp_next)
*bmp++ = part;
*bmp = NULL;
/* reverse the order of the parts */
next = &m->mp_parts;
for (bmp--; bmp >= base; bmp--) {
part = *bmp;
*next = part;
next = &part->mp_next;
}
*next = NULL;
/* free array of pointers */
free ((char *) base);
}
/*
* MESSAGE
*/
static int
InitMessage (CT ct)
{
struct k2v *kv;
CI ci = &ct->c_ctinfo;
if ((ct->c_encoding != CE_7BIT) && (ct->c_encoding != CE_8BIT)) {
admonish (NULL,
"\"%s/%s\" type in message %s should be encoded in 7bit or 8bit",
ci->ci_type, ci->ci_subtype, ct->c_file);
return NOTOK;
}
/* check for missing subtype */
if (!*ci->ci_subtype)
ci->ci_subtype = add ("rfc822", ci->ci_subtype);
/* match subtype */
for (kv = SubMessage; kv->kv_key; kv++)
if (!strcasecmp (ci->ci_subtype, kv->kv_key))
break;
ct->c_subtype = kv->kv_value;
switch (ct->c_subtype) {
case MESSAGE_RFC822:
break;
case MESSAGE_PARTIAL:
{
char **ap, **ep;
struct partial *p;
if ((p = (struct partial *) calloc (1, sizeof(*p))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) p;
/* scan for parameters "id", "number", and "total" */
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
if (!strcasecmp (*ap, "id")) {
p->pm_partid = add (*ep, NULL);
continue;
}
if (!strcasecmp (*ap, "number")) {
if (sscanf (*ep, "%d", &p->pm_partno) != 1
|| p->pm_partno < 1) {
invalid_param:
advise (NULL,
"invalid %s parameter for \"%s/%s\" type in message %s's %s field",
*ap, ci->ci_type, ci->ci_subtype,
ct->c_file, TYPE_FIELD);
return NOTOK;
}
continue;
}
if (!strcasecmp (*ap, "total")) {
if (sscanf (*ep, "%d", &p->pm_maxno) != 1
|| p->pm_maxno < 1)
goto invalid_param;
continue;
}
}
if (!p->pm_partid
|| !p->pm_partno
|| (p->pm_maxno && p->pm_partno > p->pm_maxno)) {
advise (NULL,
"invalid parameters for \"%s/%s\" type in message %s's %s field",
ci->ci_type, ci->ci_subtype,
ct->c_file, TYPE_FIELD);
return NOTOK;
}
}
break;
case MESSAGE_EXTERNAL:
{
int exresult;
struct exbody *e;
CT p;
FILE *fp;
if ((e = (struct exbody *) calloc (1, sizeof(*e))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) e;
if (!ct->c_fp
&& (ct->c_fp = fopen (ct->c_file, "r")) == NULL) {
advise (ct->c_file, "unable to open for reading");
return NOTOK;
}
fseek (fp = ct->c_fp, ct->c_begin, SEEK_SET);
if (!(p = get_content (fp, ct->c_file, 0))) {
fclose (ct->c_fp);
ct->c_fp = NULL;
return NOTOK;
}
e->eb_parent = ct;
e->eb_content = p;
p->c_ctexbody = e;
if ((exresult = params_external (ct, 0)) != NOTOK
&& p->c_ceopenfnx == openMail) {
int cc, size;
char *bp;
if ((size = ct->c_end - p->c_begin) <= 0) {
if (!e->eb_subject)
content_error (NULL, ct,
"empty body for access-type=mail-server");
goto no_body;
}
if ((e->eb_body = bp = malloc ((unsigned) size)) == NULL)
adios (NULL, "out of memory");
fseek (p->c_fp, p->c_begin, SEEK_SET);
while (size > 0)
switch (cc = fread (bp, sizeof(*bp), size, p->c_fp)) {
case NOTOK:
adios ("failed", "fread");
case OK:
adios (NULL, "unexpected EOF from fread");
default:
bp += cc, size -= cc;
break;
}
*bp = 0;
}
no_body:
p->c_fp = NULL;
p->c_end = p->c_begin;
fclose (ct->c_fp);
ct->c_fp = NULL;
if (exresult == NOTOK)
return NOTOK;
if (e->eb_flags == NOTOK)
return OK;
switch (p->c_type) {
case CT_MULTIPART:
break;
case CT_MESSAGE:
if (p->c_subtype != MESSAGE_RFC822)
break;
/* else fall... */
default:
e->eb_partno = ct->c_partno;
if (p->c_ctinitfnx)
(*p->c_ctinitfnx) (p);
break;
}
}
break;
default:
break;
}
return OK;
}
static int
params_external (CT ct, int composing)
{
char **ap, **ep;
struct exbody *e = (struct exbody *) ct->c_ctparams;
CI ci = &ct->c_ctinfo;
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
if (!strcasecmp (*ap, "access-type")) {
struct str2init *s2i;
CT p = e->eb_content;
for (s2i = str2methods; s2i->si_key; s2i++)
if (!strcasecmp (*ep, s2i->si_key))
break;
if (!s2i->si_key) {
e->eb_access = *ep;
e->eb_flags = NOTOK;
p->c_encoding = CE_EXTERNAL;
continue;
}
e->eb_access = s2i->si_key;
e->eb_flags = s2i->si_val;
p->c_encoding = CE_EXTERNAL;
/* Call the Init function for this external type */
if ((*s2i->si_init)(p) == NOTOK)
return NOTOK;
continue;
}
if (!strcasecmp (*ap, "name")) {
e->eb_name = *ep;
continue;
}
if (!strcasecmp (*ap, "permission")) {
e->eb_permission = *ep;
continue;
}
if (!strcasecmp (*ap, "site")) {
e->eb_site = *ep;
continue;
}
if (!strcasecmp (*ap, "directory")) {
e->eb_dir = *ep;
continue;
}
if (!strcasecmp (*ap, "mode")) {
e->eb_mode = *ep;
continue;
}
if (!strcasecmp (*ap, "size")) {
sscanf (*ep, "%lu", &e->eb_size);
continue;
}
if (!strcasecmp (*ap, "server")) {
e->eb_server = *ep;
continue;
}
if (!strcasecmp (*ap, "subject")) {
e->eb_subject = *ep;
continue;
}
if (composing && !strcasecmp (*ap, "body")) {
e->eb_body = getcpy (*ep);
continue;
}
}
if (!e->eb_access) {
advise (NULL,
"invalid parameters for \"%s/%s\" type in message %s's %s field",
ci->ci_type, ci->ci_subtype, ct->c_file, TYPE_FIELD);
return NOTOK;
}
return OK;
}
/*
* APPLICATION
*/
static int
InitApplication (CT ct)
{
struct k2v *kv;
CI ci = &ct->c_ctinfo;
/* match subtype */
for (kv = SubApplication; kv->kv_key; kv++)
if (!strcasecmp (ci->ci_subtype, kv->kv_key))
break;
ct->c_subtype = kv->kv_value;
return OK;
}
/*
* Set up structures for placing unencoded
* content when building parts.
*/
static int
init_decoded_content (CT ct)
{
CE ce;
if ((ce = (CE) calloc (1, sizeof(*ce))) == NULL)
adios (NULL, "out of memory");
ct->c_cefile = ce;
ct->c_ceopenfnx = open7Bit; /* since unencoded */
ct->c_ceclosefnx = close_encoding;
ct->c_cesizefnx = NULL; /* since unencoded */
return OK;
}
/*
* TRANSFER ENCODINGS
*/
static int
init_encoding (CT ct, OpenCEFunc openfnx)
{
CE ce;
if ((ce = (CE) calloc (1, sizeof(*ce))) == NULL)
adios (NULL, "out of memory");
ct->c_cefile = ce;
ct->c_ceopenfnx = openfnx;
ct->c_ceclosefnx = close_encoding;
ct->c_cesizefnx = size_encoding;
return OK;
}
static void
close_encoding (CT ct)
{
CE ce;
if (!(ce = ct->c_cefile))
return;
if (ce->ce_fp) {
fclose (ce->ce_fp);
ce->ce_fp = NULL;
}
}
static unsigned long
size_encoding (CT ct)
{
int fd;
unsigned long size;
char *file;
CE ce;
struct stat st;
if (!(ce = ct->c_cefile))
return (ct->c_end - ct->c_begin);
if (ce->ce_fp && fstat (fileno (ce->ce_fp), &st) != NOTOK)
return (long) st.st_size;
if (ce->ce_file) {
if (stat (ce->ce_file, &st) != NOTOK)
return (long) st.st_size;
else
return 0L;
}
if (ct->c_encoding == CE_EXTERNAL)
return (ct->c_end - ct->c_begin);
file = NULL;
if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
return (ct->c_end - ct->c_begin);
if (fstat (fd, &st) != NOTOK)
size = (long) st.st_size;
else
size = 0L;
(*ct->c_ceclosefnx) (ct);
return size;
}
/*
* BASE64
*/
static unsigned char b642nib[0x80] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff
};
static int
InitBase64 (CT ct)
{
return init_encoding (ct, openBase64);
}
static int
openBase64 (CT ct, char **file)
{
int bitno, cc, digested;
int fd, len, skip;
unsigned long bits;
unsigned char value, *b, *b1, *b2, *b3;
char *cp, *ep, buffer[BUFSIZ];
CE ce;
MD5_CTX mdContext;
b = (unsigned char *) &bits;
b1 = &b[endian > 0 ? 1 : 2];
b2 = &b[endian > 0 ? 2 : 1];
b3 = &b[endian > 0 ? 3 : 0];
ce = ct->c_cefile;
if (ce->ce_fp) {
fseek (ce->ce_fp, 0L, SEEK_SET);
goto ready_to_go;
}
if (ce->ce_file) {
if ((ce->ce_fp = fopen (ce->ce_file, "r")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading");
return NOTOK;
}
goto ready_to_go;
}
if (*file == NULL) {
ce->ce_file = add (m_scratch ("", tmp), NULL);
ce->ce_unlink = 1;
} else {
ce->ce_file = add (*file, NULL);
ce->ce_unlink = 0;
}
if ((ce->ce_fp = fopen (ce->ce_file, "w+")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading/writing");
return NOTOK;
}
if ((len = ct->c_end - ct->c_begin) < 0)
adios (NULL, "internal error(1)");
if (!ct->c_fp && (ct->c_fp = fopen (ct->c_file, "r")) == NULL) {
content_error (ct->c_file, ct, "unable to open for reading");
return NOTOK;
}
if ((digested = ct->c_digested))
MD5Init (&mdContext);
bitno = 18;
bits = 0L;
skip = 0;
lseek (fd = fileno (ct->c_fp), (off_t) ct->c_begin, SEEK_SET);
while (len > 0) {
switch (cc = read (fd, buffer, sizeof(buffer) - 1)) {
case NOTOK:
content_error (ct->c_file, ct, "error reading from");
goto clean_up;
case OK:
content_error (NULL, ct, "premature eof");
goto clean_up;
default:
if (cc > len)
cc = len;
len -= cc;
for (ep = (cp = buffer) + cc; cp < ep; cp++) {
switch (*cp) {
default:
if (isspace (*cp))
break;
if (skip || (*cp & 0x80)
|| (value = b642nib[*cp & 0x7f]) > 0x3f) {
if (debugsw) {
fprintf (stderr, "*cp=0x%x pos=%ld skip=%d\n",
*cp,
(long) (lseek (fd, (off_t) 0, SEEK_CUR) - (ep - cp)),
skip);
}
content_error (NULL, ct,
"invalid BASE64 encoding -- continuing");
continue;
}
bits |= value << bitno;
test_end:
if ((bitno -= 6) < 0) {
putc ((char) *b1, ce->ce_fp);
if (digested)
MD5Update (&mdContext, b1, 1);
if (skip < 2) {
putc ((char) *b2, ce->ce_fp);
if (digested)
MD5Update (&mdContext, b2, 1);
if (skip < 1) {
putc ((char) *b3, ce->ce_fp);
if (digested)
MD5Update (&mdContext, b3, 1);
}
}
if (ferror (ce->ce_fp)) {
content_error (ce->ce_file, ct,
"error writing to");
goto clean_up;
}
bitno = 18, bits = 0L, skip = 0;
}
break;
case '=':
if (++skip > 3)
goto self_delimiting;
goto test_end;
}
}
}
}
if (bitno != 18) {
if (debugsw)
fprintf (stderr, "premature ending (bitno %d)\n", bitno);
content_error (NULL, ct, "invalid BASE64 encoding");
goto clean_up;
}
self_delimiting:
fseek (ct->c_fp, 0L, SEEK_SET);
if (fflush (ce->ce_fp)) {
content_error (ce->ce_file, ct, "error writing to");
goto clean_up;
}
if (digested) {
unsigned char digest[16];
MD5Final (digest, &mdContext);
if (memcmp((char *) digest, (char *) ct->c_digest,
sizeof(digest) / sizeof(digest[0])))
content_error (NULL, ct,
"content integrity suspect (digest mismatch) -- continuing");
else
if (debugsw)
fprintf (stderr, "content integrity confirmed\n");
}
fseek (ce->ce_fp, 0L, SEEK_SET);
ready_to_go:
*file = ce->ce_file;
return fileno (ce->ce_fp);
clean_up:
free_encoding (ct, 0);
return NOTOK;
}
/*
* QUOTED PRINTABLE
*/
static char hex2nib[0x80] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static int
InitQuoted (CT ct)
{
return init_encoding (ct, openQuoted);
}
static int
openQuoted (CT ct, char **file)
{
int cc, digested, len, quoted;
char *cp, *ep;
char buffer[BUFSIZ];
unsigned char mask;
CE ce;
MD5_CTX mdContext;
ce = ct->c_cefile;
if (ce->ce_fp) {
fseek (ce->ce_fp, 0L, SEEK_SET);
goto ready_to_go;
}
if (ce->ce_file) {
if ((ce->ce_fp = fopen (ce->ce_file, "r")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading");
return NOTOK;
}
goto ready_to_go;
}
if (*file == NULL) {
ce->ce_file = add (m_scratch ("", tmp), NULL);
ce->ce_unlink = 1;
} else {
ce->ce_file = add (*file, NULL);
ce->ce_unlink = 0;
}
if ((ce->ce_fp = fopen (ce->ce_file, "w+")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading/writing");
return NOTOK;
}
if ((len = ct->c_end - ct->c_begin) < 0)
adios (NULL, "internal error(2)");
if (!ct->c_fp && (ct->c_fp = fopen (ct->c_file, "r")) == NULL) {
content_error (ct->c_file, ct, "unable to open for reading");
return NOTOK;
}
if ((digested = ct->c_digested))
MD5Init (&mdContext);
quoted = 0;
#ifdef lint
mask = 0;
#endif
fseek (ct->c_fp, ct->c_begin, SEEK_SET);
while (len > 0) {
char *dp;
if (fgets (buffer, sizeof(buffer) - 1, ct->c_fp) == NULL) {
content_error (NULL, ct, "premature eof");
goto clean_up;
}
if ((cc = strlen (buffer)) > len)
cc = len;
len -= cc;
for (ep = (cp = buffer) + cc - 1; cp <= ep; ep--)
if (!isspace (*ep))
break;
*++ep = '\n', ep++;
for (; cp < ep; cp++) {
if (quoted) {
if (quoted > 1) {
if (!isxdigit (*cp)) {
invalid_hex:
dp = "expecting hexidecimal-digit";
goto invalid_encoding;
}
mask <<= 4;
mask |= hex2nib[*cp & 0x7f];
putc (mask, ce->ce_fp);
if (digested)
MD5Update (&mdContext, &mask, 1);
} else {
switch (*cp) {
case ':':
putc (*cp, ce->ce_fp);
if (digested)
MD5Update (&mdContext, (unsigned char *) ":", 1);
break;
default:
if (!isxdigit (*cp))
goto invalid_hex;
mask = hex2nib[*cp & 0x7f];
quoted = 2;
continue;
}
}
if (ferror (ce->ce_fp)) {
content_error (ce->ce_file, ct, "error writing to");
goto clean_up;
}
quoted = 0;
continue;
}
switch (*cp) {
default:
if (*cp < '!' || *cp > '~') {
int i;
dp = "expecting character in range [!..~]";
invalid_encoding:
i = strlen (invo_name) + 2;
content_error (NULL, ct,
"invalid QUOTED-PRINTABLE encoding -- %s,\n%*.*sbut got char 0x%x",
dp, i, i, "", *cp);
goto clean_up;
}
/* and fall...*/
case ' ':
case '\t':
case '\n':
putc (*cp, ce->ce_fp);
if (digested) {
if (*cp == '\n')
MD5Update (&mdContext, (unsigned char *) "\r\n",2);
else
MD5Update (&mdContext, (unsigned char *) cp, 1);
}
if (ferror (ce->ce_fp)) {
content_error (ce->ce_file, ct, "error writing to");
goto clean_up;
}
break;
case '=':
if (*++cp != '\n') {
quoted = 1;
cp--;
}
break;
}
}
}
if (quoted) {
content_error (NULL, ct,
"invalid QUOTED-PRINTABLE encoding -- end-of-content while still quoting");
goto clean_up;
}
fseek (ct->c_fp, 0L, SEEK_SET);
if (fflush (ce->ce_fp)) {
content_error (ce->ce_file, ct, "error writing to");
goto clean_up;
}
if (digested) {
unsigned char digest[16];
MD5Final (digest, &mdContext);
if (memcmp((char *) digest, (char *) ct->c_digest,
sizeof(digest) / sizeof(digest[0])))
content_error (NULL, ct,
"content integrity suspect (digest mismatch) -- continuing");
else
if (debugsw)
fprintf (stderr, "content integrity confirmed\n");
}
fseek (ce->ce_fp, 0L, SEEK_SET);
ready_to_go:
*file = ce->ce_file;
return fileno (ce->ce_fp);
clean_up:
free_encoding (ct, 0);
return NOTOK;
}
/*
* 7BIT
*/
static int
Init7Bit (CT ct)
{
if (init_encoding (ct, open7Bit) == NOTOK)
return NOTOK;
ct->c_cesizefnx = NULL; /* no need to decode for real size */
return OK;
}
static int
open7Bit (CT ct, char **file)
{
int cc, fd, len;
char buffer[BUFSIZ];
CE ce;
ce = ct->c_cefile;
if (ce->ce_fp) {
fseek (ce->ce_fp, 0L, SEEK_SET);
goto ready_to_go;
}
if (ce->ce_file) {
if ((ce->ce_fp = fopen (ce->ce_file, "r")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading");
return NOTOK;
}
goto ready_to_go;
}
if (*file == NULL) {
ce->ce_file = add (m_scratch ("", tmp), NULL);
ce->ce_unlink = 1;
} else {
ce->ce_file = add (*file, NULL);
ce->ce_unlink = 0;
}
if ((ce->ce_fp = fopen (ce->ce_file, "w+")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading/writing");
return NOTOK;
}
if (ct->c_type == CT_MULTIPART) {
char **ap, **ep;
CI ci = &ct->c_ctinfo;
len = 0;
fprintf (ce->ce_fp, "%s: %s/%s", TYPE_FIELD, ci->ci_type, ci->ci_subtype);
len += strlen (TYPE_FIELD) + 2 + strlen (ci->ci_type)
+ 1 + strlen (ci->ci_subtype);
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
putc (';', ce->ce_fp);
len++;
snprintf (buffer, sizeof(buffer), "%s=\"%s\"", *ap, *ep);
if (len + 1 + (cc = strlen (buffer)) >= CPERLIN) {
fputs ("\n\t", ce->ce_fp);
len = 8;
} else {
putc (' ', ce->ce_fp);
len++;
}
fprintf (ce->ce_fp, "%s", buffer);
len += cc;
}
if (ci->ci_comment) {
if (len + 1 + (cc = 2 + strlen (ci->ci_comment)) >= CPERLIN) {
fputs ("\n\t", ce->ce_fp);
len = 8;
}
else {
putc (' ', ce->ce_fp);
len++;
}
fprintf (ce->ce_fp, "(%s)", ci->ci_comment);
len += cc;
}
fprintf (ce->ce_fp, "\n");
if (ct->c_id)
fprintf (ce->ce_fp, "%s:%s", ID_FIELD, ct->c_id);
if (ct->c_descr)
fprintf (ce->ce_fp, "%s:%s", DESCR_FIELD, ct->c_descr);
fprintf (ce->ce_fp, "\n");
}
if ((len = ct->c_end - ct->c_begin) < 0)
adios (NULL, "internal error(3)");
if (!ct->c_fp && (ct->c_fp = fopen (ct->c_file, "r")) == NULL) {
content_error (ct->c_file, ct, "unable to open for reading");
return NOTOK;
}
lseek (fd = fileno (ct->c_fp), (off_t) ct->c_begin, SEEK_SET);
while (len > 0)
switch (cc = read (fd, buffer, sizeof(buffer) - 1)) {
case NOTOK:
content_error (ct->c_file, ct, "error reading from");
goto clean_up;
case OK:
content_error (NULL, ct, "premature eof");
goto clean_up;
default:
if (cc > len)
cc = len;
len -= cc;
fwrite (buffer, sizeof(*buffer), cc, ce->ce_fp);
if (ferror (ce->ce_fp)) {
content_error (ce->ce_file, ct, "error writing to");
goto clean_up;
}
}
fseek (ct->c_fp, 0L, SEEK_SET);
if (fflush (ce->ce_fp)) {
content_error (ce->ce_file, ct, "error writing to");
goto clean_up;
}
fseek (ce->ce_fp, 0L, SEEK_SET);
ready_to_go:
*file = ce->ce_file;
return fileno (ce->ce_fp);
clean_up:
free_encoding (ct, 0);
return NOTOK;
}
/*
* External
*/
static int
openExternal (CT ct, CT cb, CE ce, char **file, int *fd)
{
char cachefile[BUFSIZ];
if (ce->ce_fp) {
fseek (ce->ce_fp, 0L, SEEK_SET);
goto ready_already;
}
if (ce->ce_file) {
if ((ce->ce_fp = fopen (ce->ce_file, "r")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading");
return NOTOK;
}
goto ready_already;
}
if (find_cache (ct, rcachesw, (int *) 0, cb->c_id,
cachefile, sizeof(cachefile)) != NOTOK) {
if ((ce->ce_fp = fopen (cachefile, "r"))) {
ce->ce_file = getcpy (cachefile);
ce->ce_unlink = 0;
goto ready_already;
} else {
admonish (cachefile, "unable to fopen for reading");
}
}
return OK;
ready_already:
*file = ce->ce_file;
*fd = fileno (ce->ce_fp);
return DONE;
}
/*
* File
*/
static int
InitFile (CT ct)
{
return init_encoding (ct, openFile);
}
static int
openFile (CT ct, char **file)
{
int fd, cachetype;
char cachefile[BUFSIZ];
struct exbody *e = ct->c_ctexbody;
CE ce = ct->c_cefile;
switch (openExternal (e->eb_parent, e->eb_content, ce, file, &fd)) {
case NOTOK:
return NOTOK;
case OK:
break;
case DONE:
return fd;
}
if (!e->eb_name) {
content_error (NULL, ct, "missing name parameter");
return NOTOK;
}
ce->ce_file = getcpy (e->eb_name);
ce->ce_unlink = 0;
if ((ce->ce_fp = fopen (ce->ce_file, "r")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading");
return NOTOK;
}
if ((!e->eb_permission || strcasecmp (e->eb_permission, "read-write"))
&& find_cache (NULL, wcachesw, &cachetype, e->eb_content->c_id,
cachefile, sizeof(cachefile)) != NOTOK) {
int mask;
FILE *fp;
mask = umask (cachetype ? ~m_gmprot () : 0222);
if ((fp = fopen (cachefile, "w"))) {
int cc;
char buffer[BUFSIZ];
FILE *gp = ce->ce_fp;
fseek (gp, 0L, SEEK_SET);
while ((cc = fread (buffer, sizeof(*buffer), sizeof(buffer), gp))
> 0)
fwrite (buffer, sizeof(*buffer), cc, fp);
fflush (fp);
if (ferror (gp)) {
admonish (ce->ce_file, "error reading");
unlink (cachefile);
}
else
if (ferror (fp)) {
admonish (cachefile, "error writing");
unlink (cachefile);
}
fclose (fp);
}
umask (mask);
}
fseek (ce->ce_fp, 0L, SEEK_SET);
*file = ce->ce_file;
return fileno (ce->ce_fp);
}
/*
* FTP
*/
static int
InitFTP (CT ct)
{
return init_encoding (ct, openFTP);
}
static int
openFTP (CT ct, char **file)
{
int cachetype, caching, fd;
int len, buflen;
char *bp, *ftp, *user, *pass;
char buffer[BUFSIZ], cachefile[BUFSIZ];
struct exbody *e;
CE ce;
static char *username = NULL;
static char *password = NULL;
e = ct->c_ctexbody;
ce = ct->c_cefile;
if ((ftp = context_find (nmhaccessftp)) && !*ftp)
ftp = NULL;
#ifndef BUILTIN_FTP
if (!ftp)
return NOTOK;
#endif
switch (openExternal (e->eb_parent, e->eb_content, ce, file, &fd)) {
case NOTOK:
return NOTOK;
case OK:
break;
case DONE:
return fd;
}
if (!e->eb_name || !e->eb_site) {
content_error (NULL, ct, "missing %s parameter",
e->eb_name ? "site": "name");
return NOTOK;
}
if (xpid) {
if (xpid < 0)
xpid = -xpid;
pidcheck (pidwait (xpid, NOTOK));
xpid = 0;
}
/* Get the buffer ready to go */
bp = buffer;
buflen = sizeof(buffer);
/*
* Construct the query message for user
*/
snprintf (bp, buflen, "Retrieve %s", e->eb_name);
len = strlen (bp);
bp += len;
buflen -= len;
if (e->eb_partno) {
snprintf (bp, buflen, " (content %s)", e->eb_partno);
len = strlen (bp);
bp += len;
buflen -= len;
}
snprintf (bp, buflen, "\n using %sFTP from site %s",
e->eb_flags ? "anonymous " : "", e->eb_site);
len = strlen (bp);
bp += len;
buflen -= len;
if (e->eb_size > 0) {
snprintf (bp, buflen, " (%lu octets)", e->eb_size);
len = strlen (bp);
bp += len;
buflen -= len;
}
snprintf (bp, buflen, "? ");
/*
* Now, check the answer
*/
if (!getanswer (buffer))
return NOTOK;
if (e->eb_flags) {
user = "anonymous";
snprintf (buffer, sizeof(buffer), "%s@%s", getusername (), LocalName ());
pass = buffer;
} else {
ruserpass (e->eb_site, &username, &password);
user = username;
pass = password;
}
ce->ce_unlink = (*file == NULL);
caching = 0;
cachefile[0] = '\0';
if ((!e->eb_permission || strcasecmp (e->eb_permission, "read-write"))
&& find_cache (NULL, wcachesw, &cachetype, e->eb_content->c_id,
cachefile, sizeof(cachefile)) != NOTOK) {
if (*file == NULL) {
ce->ce_unlink = 0;
caching = 1;
}
}
if (*file)
ce->ce_file = add (*file, NULL);
else if (caching)
ce->ce_file = add (cachefile, NULL);
else
ce->ce_file = add (m_scratch ("", tmp), NULL);
if ((ce->ce_fp = fopen (ce->ce_file, "w+")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading/writing");
return NOTOK;
}
#ifdef BUILTIN_FTP
if (ftp)
#endif
{
int child_id, i, vecp;
char *vec[9];
vecp = 0;
vec[vecp++] = r1bindex (ftp, '/');
vec[vecp++] = e->eb_site;
vec[vecp++] = user;
vec[vecp++] = pass;
vec[vecp++] = e->eb_dir;
vec[vecp++] = e->eb_name;
vec[vecp++] = ce->ce_file,
vec[vecp++] = e->eb_mode && !strcasecmp (e->eb_mode, "ascii")
? "ascii" : "binary";
vec[vecp] = NULL;
fflush (stdout);
for (i = 0; (child_id = vfork ()) == NOTOK && i < 5; i++)
sleep (5);
switch (child_id) {
case NOTOK:
adios ("fork", "unable to");
/* NOTREACHED */
case OK:
close (fileno (ce->ce_fp));
execvp (ftp, vec);
fprintf (stderr, "unable to exec ");
perror (ftp);
_exit (-1);
/* NOTREACHED */
default:
if (pidXwait (child_id, NULL)) {
#ifdef BUILTIN_FTP
losing_ftp:
#endif
username = password = NULL;
ce->ce_unlink = 1;
return NOTOK;
}
break;
}
}
#ifdef BUILTIN_FTP
else
if (ftp_get (e->eb_site, user, pass, e->eb_dir, e->eb_name,
ce->ce_file,
e->eb_mode && !strcasecmp (e->eb_mode, "ascii"), 0)
== NOTOK)
goto losing_ftp;
#endif
if (cachefile[0]) {
if (caching)
chmod (cachefile, cachetype ? m_gmprot () : 0444);
else {
int mask;
FILE *fp;
mask = umask (cachetype ? ~m_gmprot () : 0222);
if ((fp = fopen (cachefile, "w"))) {
int cc;
FILE *gp = ce->ce_fp;
fseek (gp, 0L, SEEK_SET);
while ((cc= fread (buffer, sizeof(*buffer), sizeof(buffer), gp))
> 0)
fwrite (buffer, sizeof(*buffer), cc, fp);
fflush (fp);
if (ferror (gp)) {
admonish (ce->ce_file, "error reading");
unlink (cachefile);
}
else
if (ferror (fp)) {
admonish (cachefile, "error writing");
unlink (cachefile);
}
fclose (fp);
}
umask (mask);
}
}
fseek (ce->ce_fp, 0L, SEEK_SET);
*file = ce->ce_file;
return fileno (ce->ce_fp);
}
/*
* Mail
*/
static int
InitMail (CT ct)
{
return init_encoding (ct, openMail);
}
static int
openMail (CT ct, char **file)
{
int child_id, fd, i, vecp;
int len, buflen;
char *bp, buffer[BUFSIZ], *vec[7];
struct exbody *e = ct->c_ctexbody;
CE ce = ct->c_cefile;
switch (openExternal (e->eb_parent, e->eb_content, ce, file, &fd)) {
case NOTOK:
return NOTOK;
case OK:
break;
case DONE:
return fd;
}
if (!e->eb_server) {
content_error (NULL, ct, "missing server parameter");
return NOTOK;
}
if (xpid) {
if (xpid < 0)
xpid = -xpid;
pidcheck (pidwait (xpid, NOTOK));
xpid = 0;
}
/* Get buffer ready to go */
bp = buffer;
buflen = sizeof(buffer);
/* Now construct query message */
snprintf (bp, buflen, "Retrieve content");
len = strlen (bp);
bp += len;
buflen -= len;
if (e->eb_partno) {
snprintf (bp, buflen, " %s", e->eb_partno);
len = strlen (bp);
bp += len;
buflen -= len;
}
snprintf (bp, buflen, " by asking %s\n\n%s\n? ",
e->eb_server,
e->eb_subject ? e->eb_subject : e->eb_body);
/* Now, check answer */
if (!getanswer (buffer))
return NOTOK;
vecp = 0;
vec[vecp++] = r1bindex (mailproc, '/');
vec[vecp++] = e->eb_server;
vec[vecp++] = "-subject";
vec[vecp++] = e->eb_subject ? e->eb_subject : "mail-server request";
vec[vecp++] = "-body";
vec[vecp++] = e->eb_body;
vec[vecp] = NULL;
for (i = 0; (child_id = vfork ()) == NOTOK && i < 5; i++)
sleep (5);
switch (child_id) {
case NOTOK:
advise ("fork", "unable to");
return NOTOK;
case OK:
execvp (mailproc, vec);
fprintf (stderr, "unable to exec ");
perror (mailproc);
_exit (-1);
/* NOTREACHED */
default:
if (pidXwait (child_id, NULL) == OK)
advise (NULL, "request sent");
break;
}
if (*file == NULL) {
ce->ce_file = add (m_scratch ("", tmp), NULL);
ce->ce_unlink = 1;
} else {
ce->ce_file = add (*file, NULL);
ce->ce_unlink = 0;
}
if ((ce->ce_fp = fopen (ce->ce_file, "w+")) == NULL) {
content_error (ce->ce_file, ct, "unable to fopen for reading/writing");
return NOTOK;
}
fseek (ce->ce_fp, 0L, SEEK_SET);
*file = ce->ce_file;
return fileno (ce->ce_fp);
}
static char *
fgetstr (char *s, int n, FILE *stream)
{
char *cp, *ep;
for (ep = (cp = s) + n; cp < ep; ) {
int i;
if (!fgets (cp, n, stream))
return (cp != s ? s : NULL);
if (cp == s && *cp != '#')
return s;
cp += (i = strlen (cp)) - 1;
if (i <= 1 || *cp-- != '\n' || *cp != '\\')
break;
*cp = '\0';
n -= (i - 2);
}
return s;
}
/*
* Parse the composition draft for text and directives.
* Do initial setup of Content structure.
*/
static int
user_content (FILE *in, char *file, char *buf, CT *ctp)
{
int extrnal, vrsn;
char *cp, **ap;
char buffer[BUFSIZ];
struct multipart *m;
struct part **pp;
struct stat st;
struct str2init *s2i;
CI ci;
CT ct;
CE ce;
if (buf[0] == '\n' || strcmp (buf, "#\n") == 0) {
*ctp = NULL;
return OK;
}
/* allocate basic Content structure */
if ((ct = (CT) calloc (1, sizeof(*ct))) == NULL)
adios (NULL, "out of memory");
*ctp = ct;
/* allocate basic structure for handling decoded content */
init_decoded_content (ct);
ce = ct->c_cefile;
ci = &ct->c_ctinfo;
set_id (ct, 0);
/*
* Handle inline text. Check if line
* is one of the following forms:
*
* 1) doesn't begin with '#' (implicit directive)
* 2) begins with "##" (implicit directive)
* 3) begins with "#<"
*/
if (buf[0] != '#' || buf[1] == '#' || buf[1] == '<') {
int headers;
int inlineD;
long pos;
char content[BUFSIZ];
FILE *out;
/* use a temp file to collect the plain text lines */
ce->ce_file = add (m_tmpfil (invo_name), NULL);
ce->ce_unlink = 1;
if ((out = fopen (ce->ce_file, "w")) == NULL)
adios (ce->ce_file, "unable to open for writing");
if (buf[0] == '#' && buf[1] == '<') {
strncpy (content, buf + 2, sizeof(content));
inlineD = 1;
goto rock_and_roll;
} else {
inlineD = 0;
}
/* the directive is implicit */
strncpy (content, "text/plain", sizeof(content));
headers = 0;
strncpy (buffer, buf[0] != '#' ? buf : buf + 1, sizeof(buffer));
for (;;) {
int i;
if (headers >= 0 && uprf (buffer, DESCR_FIELD)
&& buffer[i = strlen (DESCR_FIELD)] == ':') {
headers = 1;
again_descr:
ct->c_descr = add (buffer + i + 1, ct->c_descr);
if (!fgetstr (buffer, sizeof(buffer) - 1, in))
adios (NULL, "end-of-file after %s: field in plaintext", DESCR_FIELD);
switch (buffer[0]) {
case ' ':
case '\t':
i = -1;
goto again_descr;
case '#':
adios (NULL, "#-directive after %s: field in plaintext", DESCR_FIELD);
/* NOTREACHED */
default:
break;
}
}
if (headers != 1 || buffer[0] != '\n')
fputs (buffer, out);
rock_and_roll:
headers = -1;
pos = ftell (in);
if ((cp = fgetstr (buffer, sizeof(buffer) - 1, in)) == NULL)
break;
if (buffer[0] == '#') {
char *bp;
if (buffer[1] != '#')
break;
for (cp = (bp = buffer) + 1; *cp; cp++)
*bp++ = *cp;
*bp = '\0';
}
}
if (listsw)
ct->c_end = ftell (out);
fclose (out);
/* parse content type */
if (get_ctinfo (content, ct, inlineD) == NOTOK)
done (1);
for (s2i = str2cts; s2i->si_key; s2i++)
if (!strcasecmp (ci->ci_type, s2i->si_key))
break;
if (!s2i->si_key && !uprf (ci->ci_type, "X-"))
s2i++;
/*
* check type specified (possibly implicitly)
*/
switch (ct->c_type = s2i->si_val) {
case CT_MESSAGE:
if (!strcasecmp (ci->ci_subtype, "rfc822")) {
ct->c_encoding = CE_7BIT;
goto call_init;
}
/* else fall... */
case CT_MULTIPART:
adios (NULL, "it doesn't make sense to define an in-line %s content",
ct->c_type == CT_MESSAGE ? "message" : "multipart");
/* NOTREACHED */
default:
call_init:
if ((ct->c_ctinitfnx = s2i->si_init))
(*ct->c_ctinitfnx) (ct);
break;
}
if (cp)
fseek (in, pos, SEEK_SET);
return OK;
}
/*
* If we've reached this point, the next line
* must be some type of explicit directive.
*/
/* check if directive is external-type */
extrnal = (buf[1] == '@');
/* parse directive */
if (get_ctinfo (buf + (extrnal ? 2 : 1), ct, 1) == NOTOK)
done (1);
/* check directive against the list of MIME types */
for (s2i = str2cts; s2i->si_key; s2i++)
if (!strcasecmp (ci->ci_type, s2i->si_key))
break;
/*
* Check if the directive specified a valid type.
* This will happen if it was one of the following forms:
*
* #type/subtype (or)
* #@type/subtype
*/
if (s2i->si_key) {
if (!ci->ci_subtype)
adios (NULL, "missing subtype in \"#%s\"", ci->ci_type);
switch (ct->c_type = s2i->si_val) {
case CT_MULTIPART:
adios (NULL, "use \"#begin ... #end\" instead of \"#%s/%s\"",
ci->ci_type, ci->ci_subtype);
/* NOTREACHED */
case CT_MESSAGE:
if (!strcasecmp (ci->ci_subtype, "partial"))
adios (NULL, "sorry, \"#%s/%s\" isn't supported",
ci->ci_type, ci->ci_subtype);
if (!strcasecmp (ci->ci_subtype, "external-body"))
adios (NULL, "use \"#@type/subtype ... [] ...\" instead of \"#%s/%s\"",
ci->ci_type, ci->ci_subtype);
use_forw:
adios (NULL,
"use \"#forw [+folder] [msgs]\" instead of \"#%s/%s\"",
ci->ci_type, ci->ci_subtype);
/* NOTREACHED */
default:
if ((ct->c_ctinitfnx = s2i->si_init))
(*ct->c_ctinitfnx) (ct);
break;
}
/*
* #@type/subtype (external types directive)
*/
if (extrnal) {
struct exbody *e;
CT p;
if (!ci->ci_magic)
adios (NULL, "need external information for \"#@%s/%s\"",
ci->ci_type, ci->ci_subtype);
p = ct;
snprintf (buffer, sizeof(buffer), "message/external-body; %s", ci->ci_magic);
free (ci->ci_magic);
ci->ci_magic = NULL;
/*
* Since we are using the current Content structure to
* hold information about the type of the external
* reference, we need to create another Content structure
* for the message/external-body to wrap it in.
*/
if ((ct = (CT) calloc (1, sizeof(*ct))) == NULL)
adios (NULL, "out of memory");
*ctp = ct;
ci = &ct->c_ctinfo;
if (get_ctinfo (buffer, ct, 0) == NOTOK)
done (1);
ct->c_type = CT_MESSAGE;
ct->c_subtype = MESSAGE_EXTERNAL;
if ((e = (struct exbody *) calloc (1, sizeof(*e))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) e;
e->eb_parent = ct;
e->eb_content = p;
p->c_ctexbody = e;
if (params_external (ct, 1) == NOTOK)
done (1);
return OK;
}
/* Handle [file] argument */
if (ci->ci_magic) {
/* check if specifies command to execute */
if (*ci->ci_magic == '|' || *ci->ci_magic == '!') {
for (cp = ci->ci_magic + 1; isspace (*cp); cp++)
continue;
if (!*cp)
adios (NULL, "empty pipe command for #%s directive", ci->ci_type);
cp = add (cp, NULL);
free (ci->ci_magic);
ci->ci_magic = cp;
} else {
/* record filename of decoded contents */
ce->ce_file = ci->ci_magic;
if (access (ce->ce_file, R_OK) == NOTOK)
adios ("reading", "unable to access %s for", ce->ce_file);
if (listsw && stat (ce->ce_file, &st) != NOTOK)
ct->c_end = (long) st.st_size;
ci->ci_magic = NULL;
}
return OK;
}
/*
* No [file] argument, so check profile for
* method to compose content.
*/
snprintf (buffer, sizeof(buffer), "%s-compose-%s/%s",
invo_name, ci->ci_type, ci->ci_subtype);
if ((cp = context_find (buffer)) == NULL || *cp == '\0') {
snprintf (buffer, sizeof(buffer), "%s-compose-%s", invo_name, ci->ci_type);
if ((cp = context_find (buffer)) == NULL || *cp == '\0') {
content_error (NULL, ct, "don't know how to compose content");
done (1);
}
}
ci->ci_magic = add (cp, NULL);
return OK;
}
if (extrnal)
adios (NULL, "external definition not allowed for \"#%s\"", ci->ci_type);
/*
* Message directive
* #forw [+folder] [msgs]
*/
if (!strcasecmp (ci->ci_type, "forw")) {
int msgnum;
char *folder, *arguments[MAXARGS];
struct msgs *mp;
if (ci->ci_magic) {
ap = brkstring (ci->ci_magic, " ", "\n");
copyip (ap, arguments, MAXARGS);
} else {
arguments[0] = "cur";
arguments[1] = NULL;
}
folder = NULL;
/* search the arguments for a folder name */
for (ap = arguments; *ap; ap++) {
cp = *ap;
if (*cp == '+' || *cp == '@') {
if (folder)
adios (NULL, "only one folder per #forw directive");
else
folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
}
}
/* else, use the current folder */
if (!folder)
folder = add (getfolder (1), NULL);
if (!(mp = folder_read (folder)))
adios (NULL, "unable to read folder %s", folder);
for (ap = arguments; *ap; ap++) {
cp = *ap;
if (*cp != '+' && *cp != '@')
if (!m_convert (mp, cp))
done (1);
}
free (folder);
free_ctinfo (ct);
/*
* If there is more than one message to include, make this
* a content of type "multipart/digest" and insert each message
* as a subpart. If there is only one message, then make this
* a content of type "message/rfc822".
*/
if (mp->numsel > 1) {
/* we are forwarding multiple messages */
if (get_ctinfo ("multipart/digest", ct, 0) == NOTOK)
done (1);
ct->c_type = CT_MULTIPART;
ct->c_subtype = MULTI_DIGEST;
if ((m = (struct multipart *) calloc (1, sizeof(*m))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) m;
pp = &m->mp_parts;
for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
if (is_selected(mp, msgnum)) {
struct part *part;
CT p;
CE pe;
if ((p = (CT) calloc (1, sizeof(*p))) == NULL)
adios (NULL, "out of memory");
init_decoded_content (p);
pe = p->c_cefile;
if (get_ctinfo ("message/rfc822", p, 0) == NOTOK)
done (1);
p->c_type = CT_MESSAGE;
p->c_subtype = MESSAGE_RFC822;
snprintf (buffer, sizeof(buffer), "%s/%d", mp->foldpath, msgnum);
pe->ce_file = add (buffer, NULL);
if (listsw && stat (pe->ce_file, &st) != NOTOK)
p->c_end = (long) st.st_size;
if ((part = (struct part *) calloc (1, sizeof(*part))) == NULL)
adios (NULL, "out of memory");
*pp = part;
pp = &part->mp_next;
part->mp_part = p;
}
}
} else {
/* we are forwarding one message */
if (get_ctinfo ("message/rfc822", ct, 0) == NOTOK)
done (1);
ct->c_type = CT_MESSAGE;
ct->c_subtype = MESSAGE_RFC822;
msgnum = mp->lowsel;
snprintf (buffer, sizeof(buffer), "%s/%d", mp->foldpath, msgnum);
ce->ce_file = add (buffer, NULL);
if (listsw && stat (ce->ce_file, &st) != NOTOK)
ct->c_end = (long) st.st_size;
}
folder_free (mp); /* free folder/message structure */
return OK;
}
/*
* #end
*/
if (!strcasecmp (ci->ci_type, "end")) {
free_content (ct);
*ctp = NULL;
return DONE;
}
/*
* #begin [ alternative | parallel ]
*/
if (!strcasecmp (ci->ci_type, "begin")) {
if (!ci->ci_magic) {
vrsn = MULTI_MIXED;
cp = SubMultiPart[vrsn - 1].kv_key;
} else if (!strcasecmp (ci->ci_magic, "alternative")) {
vrsn = MULTI_ALTERNATE;
cp = SubMultiPart[vrsn - 1].kv_key;
} else if (!strcasecmp (ci->ci_magic, "parallel")) {
vrsn = MULTI_PARALLEL;
cp = SubMultiPart[vrsn - 1].kv_key;
} else if (uprf (ci->ci_magic, "digest")) {
goto use_forw;
} else {
vrsn = MULTI_UNKNOWN;
cp = ci->ci_magic;
}
free_ctinfo (ct);
snprintf (buffer, sizeof(buffer), "multipart/%s", cp);
if (get_ctinfo (buffer, ct, 0) == NOTOK)
done (1);
ct->c_type = CT_MULTIPART;
ct->c_subtype = vrsn;
if ((m = (struct multipart *) calloc (1, sizeof(*m))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) m;
pp = &m->mp_parts;
while (fgetstr (buffer, sizeof(buffer) - 1, in)) {
struct part *part;
CT p;
if (user_content (in, file, buffer, &p) == DONE) {
if (!m->mp_parts)
adios (NULL, "empty \"#begin ... #end\" sequence");
return OK;
}
if (!p)
continue;
if ((part = (struct part *) calloc (1, sizeof(*part))) == NULL)
adios (NULL, "out of memory");
*pp = part;
pp = &part->mp_next;
part->mp_part = p;
}
admonish (NULL, "premature end-of-file, missing #end");
return OK;
}
/*
* Unknown directive
*/
adios (NULL, "unknown directive \"#%s\"", ci->ci_type);
return NOTOK; /* NOT REACHED */
}
static void
set_id (CT ct, int top)
{
char msgid[BUFSIZ];
static int partno;
static time_t clock = 0;
static char *msgfmt;
if (clock == 0) {
time (&clock);
snprintf (msgid, sizeof(msgid), "<%d.%ld.%%d@%s>\n",
(int) getpid(), (long) clock, LocalName());
partno = 0;
msgfmt = getcpy(msgid);
}
snprintf (msgid, sizeof(msgid), msgfmt, top ? 0 : ++partno);
ct->c_id = getcpy (msgid);
}
static char ebcdicsafe[0x100] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01,
0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/*
* Fill out, or expand the various contents in the composition
* draft. Read-in any necessary files. Parse and execute any
* commands specified by profile composition strings.
*/
static int
compose_content (CT ct)
{
CE ce = ct->c_cefile;
switch (ct->c_type) {
case CT_MULTIPART:
{
int partnum;
char *pp;
char partnam[BUFSIZ];
struct multipart *m = (struct multipart *) ct->c_ctparams;
struct part *part;
if (ct->c_partno) {
snprintf (partnam, sizeof(partnam), "%s.", ct->c_partno);
pp = partnam + strlen (partnam);
} else {
pp = partnam;
}
/* first, we call compose_content on all the subparts */
for (part = m->mp_parts, partnum = 1; part; part = part->mp_next, partnum++) {
CT p = part->mp_part;
sprintf (pp, "%d", partnum);
p->c_partno = add (partnam, NULL);
if (compose_content (p) == NOTOK)
return NOTOK;
}
/*
* If the -rfc934mode switch is given, then check all
* the subparts of a multipart/digest. If they are all
* message/rfc822, then mark this content and all
* subparts with the rfc934 compatibility mode flag.
*/
if (rfc934sw && ct->c_subtype == MULTI_DIGEST) {
int is934 = 1;
for (part = m->mp_parts; part; part = part->mp_next) {
CT p = part->mp_part;
if (p->c_subtype != MESSAGE_RFC822) {
is934 = 0;
break;
}
}
ct->c_rfc934 = is934;
for (part = m->mp_parts; part; part = part->mp_next) {
CT p = part->mp_part;
if ((p->c_rfc934 = is934))
p->c_end++;
}
}
if (listsw) {
ct->c_end = (partnum = strlen (prefix) + 2) + 2;
if (ct->c_rfc934)
ct->c_end += 1;
for (part = m->mp_parts; part; part = part->mp_next)
ct->c_end += part->mp_part->c_end + partnum;
}
}
break;
case CT_MESSAGE:
/* Nothing to do for type message */
break;
/*
* Discrete types (text/application/audio/image/video)
*/
default:
if (!ce->ce_file) {
pid_t child_id;
int i, xstdout, len, buflen;
char *bp, **ap, *cp;
char *vec[4], buffer[BUFSIZ];
FILE *out;
CI ci = &ct->c_ctinfo;
if (!(cp = ci->ci_magic))
adios (NULL, "internal error(5)");
ce->ce_file = add (m_tmpfil (invo_name), NULL);
ce->ce_unlink = 1;
xstdout = 0;
/* Get buffer ready to go */
bp = buffer;
bp[0] = '\0';
buflen = sizeof(buffer);
/*
* Parse composition string into buffer
*/
for ( ; *cp; cp++) {
if (*cp == '%') {
switch (*++cp) {
case 'a':
{
/* insert parameters from directive */
char **ep;
char *s = "";
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
snprintf (bp, buflen, "%s%s=\"%s\"", s, *ap, *ep);
len = strlen (bp);
bp += len;
buflen -= len;
s = " ";
}
}
break;
case 'F':
/* %f, and stdout is not-redirected */
xstdout = 1;
/* and fall... */
case 'f':
/*
* insert temporary filename where
* content should be written
*/
snprintf (bp, buflen, "%s", ce->ce_file);
break;
case 's':
/* insert content subtype */
strncpy (bp, ci->ci_subtype, buflen);
break;
case '%':
/* insert character % */
goto raw;
default:
*bp++ = *--cp;
*bp = '\0';
buflen--;
continue;
}
len = strlen (bp);
bp += len;
buflen -= len;
} else {
raw:
*bp++ = *cp;
*bp = '\0';
buflen--;
}
}
if (verbosw)
printf ("composing content %s/%s from command\n\t%s\n",
ci->ci_type, ci->ci_subtype, buffer);
fflush (stdout); /* not sure if need for -noverbose */
vec[0] = "/bin/sh";
vec[1] = "-c";
vec[2] = buffer;
vec[3] = NULL;
if ((out = fopen (ce->ce_file, "w")) == NULL)
adios (ce->ce_file, "unable to open for writing");
for (i = 0; (child_id = vfork()) == NOTOK && i > 5; i++)
sleep (5);
switch (child_id) {
case NOTOK:
adios ("fork", "unable to fork");
/* NOTREACHED */
case OK:
if (!xstdout)
dup2 (fileno (out), 1);
close (fileno (out));
execvp ("/bin/sh", vec);
fprintf (stderr, "unable to exec ");
perror ("/bin/sh");
_exit (-1);
/* NOTREACHED */
default:
fclose (out);
if (pidXwait(child_id, NULL))
done (1);
break;
}
}
/* Check size of file */
if (listsw && ct->c_end == 0L) {
struct stat st;
if (stat (ce->ce_file, &st) != NOTOK)
ct->c_end = (long) st.st_size;
}
break;
}
return OK;
}
/*
* Scan the content.
*
* 1) choose a transfer encoding.
* 2) check for clashes with multipart boundary string.
* 3) for text content, figure out which character set is being used.
*
* If there is a clash with one of the contents and the multipart boundary,
* this function will exit with NOTOK. This will cause the scanning process
* to be repeated with a different multipart boundary. It is possible
* (although highly unlikely) that this scan will be repeated multiple times.
*/
static int
scan_content (CT ct)
{
int len;
int check8bit, contains8bit = 0; /* check if contains 8bit data */
int checklinelen, linelen = 0; /* check for long lines */
int checkboundary, boundaryclash = 0; /* check if clashes with multipart boundary */
int checklinespace, linespace = 0; /* check if any line ends with space */
int checkebcdic, ebcdicunsafe = 0; /* check if contains ebcdic unsafe characters */
char *cp, buffer[BUFSIZ];
struct text *t;
FILE *in;
CE ce = ct->c_cefile;
/*
* handle multipart by scanning all subparts
* and then checking their encoding.
*/
if (ct->c_type == CT_MULTIPART) {
struct multipart *m = (struct multipart *) ct->c_ctparams;
struct part *part;
/* initially mark the domain of enclosing multipart as 7bit */
ct->c_encoding = CE_7BIT;
for (part = m->mp_parts; part; part = part->mp_next) {
CT p = part->mp_part;
if (scan_content (p) == NOTOK) /* choose encoding for subpart */
return NOTOK;
/* if necessary, enlarge encoding for enclosing multipart */
if (p->c_encoding == CE_BINARY)
ct->c_encoding = CE_BINARY;
if (p->c_encoding == CE_8BIT && ct->c_encoding != CE_BINARY)
ct->c_encoding = CE_8BIT;
}
return OK;
}
/*
* Decide what to check while scanning this content.
*/
switch (ct->c_type) {
case CT_TEXT:
check8bit = 1;
checkboundary = 1;
if (ct->c_subtype == TEXT_PLAIN) {
checkebcdic = 0;
checklinelen = 0;
checklinespace = 0;
} else {
checkebcdic = ebcdicsw;
checklinelen = 1;
checklinespace = 1;
}
break;
case CT_APPLICATION:
check8bit = 1;
checkebcdic = ebcdicsw;
checklinelen = 1;
checklinespace = 1;
checkboundary = 1;
break;
case CT_MESSAGE:
check8bit = 0;
checkebcdic = 0;
checklinelen = 0;
checklinespace = 0;
/* 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;
checkebcdic = 0;
checklinelen = 0;
checklinespace = 0;
checkboundary = 0;
break;
}
/*
* Scan the unencoded content
*/
if (check8bit || checklinelen || checklinespace || checkboundary) {
if ((in = fopen (ce->ce_file, "r")) == NULL)
adios (ce->ce_file, "unable to open for reading");
len = strlen (prefix);
while (fgets (buffer, sizeof(buffer) - 1, in)) {
/*
* Check for 8bit data.
*/
if (check8bit) {
for (cp = buffer; *cp; cp++) {
if (!isascii (*cp)) {
contains8bit = 1;
check8bit = 0; /* no need to keep checking */
}
/*
* Check if character is ebcdic-safe. We only check
* this if also checking for 8bit data.
*/
if (checkebcdic && !ebcdicsafe[*cp & 0xff]) {
ebcdicunsafe = 1;
checkebcdic = 0; /* no need to keep checking */
}
}
}
/*
* Check line length.
*/
if (checklinelen && (strlen (buffer) > CPERLIN + 1)) {
linelen = 1;
checklinelen = 0; /* no need to keep checking */
}
/*
* Check if line ends with a space.
*/
if (checklinespace && (cp = buffer + strlen (buffer) - 2) > buffer && isspace (*cp)) {
linespace = 1;
checklinespace = 0; /* no need to keep checking */
}
/*
* Check if content contains a line that clashes
* with our standard boundary for multipart messages.
*/
if (checkboundary && buffer[0] == '-' && buffer[1] == '-') {
for (cp = buffer + strlen (buffer) - 1; cp >= buffer; cp--)
if (!isspace (*cp))
break;
*++cp = '\0';
if (!strncmp(buffer + 2, prefix, len) && isdigit(buffer[2 + len])) {
boundaryclash = 1;
checkboundary = 0; /* no need to keep checking */
}
}
}
fclose (in);
}
/*
* Decide which transfer encoding to use.
*/
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.
*/
t = (struct text *) ct->c_ctparams;
if (t->tx_charset == CHARSET_UNSPECIFIED) {
CI ci = &ct->c_ctinfo;
char **ap, **ep;
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++)
continue;
if (contains8bit) {
t->tx_charset = CHARSET_UNKNOWN;
*ap = concat ("charset=", write_charset_8bit(), NULL);
} else {
t->tx_charset = CHARSET_USASCII;
*ap = add ("charset=us-ascii", NULL);
}
cp = strchr(*ap++, '=');
*ap = NULL;
*cp++ = '\0';
*ep = cp;
}
if (contains8bit || ebcdicunsafe || linelen || linespace || checksw)
ct->c_encoding = CE_QUOTED;
else
ct->c_encoding = CE_7BIT;
break;
case CT_APPLICATION:
/* For application type, use base64, except when postscript */
if (contains8bit || ebcdicunsafe || linelen || linespace || checksw)
ct->c_encoding = (ct->c_subtype == APPLICATION_POSTSCRIPT)
? CE_QUOTED : CE_BASE64;
else
ct->c_encoding = CE_7BIT;
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);
}
/*
* Scan the content structures, and build header
* fields that will need to be output into the
* message.
*/
static int
build_headers (CT ct)
{
int cc, mailbody, len;
char **ap, **ep;
char *np, *vp, buffer[BUFSIZ];
CI ci = &ct->c_ctinfo;
/*
* If message is type multipart, then add the multipart
* boundary to the list of attribute/value pairs.
*/
if (ct->c_type == CT_MULTIPART) {
char *cp;
static int level = 0; /* store nesting level */
ap = ci->ci_attrs;
ep = ci->ci_values;
snprintf (buffer, sizeof(buffer), "boundary=%s%d", prefix, level++);
cp = strchr(*ap++ = add (buffer, NULL), '=');
*ap = NULL;
*cp++ = '\0';
*ep = cp;
}
/*
* Skip the output of Content-Type, parameters, content
* description, and Content-ID if the content is of type
* "message" and the rfc934 compatibility flag is set
* (which means we are inside multipart/digest and the
* switch -rfc934mode was given).
*/
if (ct->c_type == CT_MESSAGE && ct->c_rfc934)
goto skip_headers;
/*
* output the content type and subtype
*/
np = add (TYPE_FIELD, NULL);
vp = concat (" ", ci->ci_type, "/", ci->ci_subtype, NULL);
/* keep track of length of line */
len = strlen (TYPE_FIELD) + strlen (ci->ci_type)
+ strlen (ci->ci_subtype) + 3;
mailbody = ct->c_type == CT_MESSAGE
&& ct->c_subtype == MESSAGE_EXTERNAL
&& ((struct exbody *) ct->c_ctparams)->eb_body;
/*
* Append the attribute/value pairs to
* the end of the Content-Type line.
*/
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
if (mailbody && !strcasecmp (*ap, "body"))
continue;
vp = add (";", vp);
len++;
snprintf (buffer, sizeof(buffer), "%s=\"%s\"", *ap, *ep);
if (len + 1 + (cc = strlen (buffer)) >= CPERLIN) {
vp = add ("\n\t", vp);
len = 8;
} else {
vp = add (" ", vp);
len++;
}
vp = add (buffer, vp);
len += cc;
}
/*
* Append any RFC-822 comment to the end of
* the Content-Type line.
*/
if (ci->ci_comment) {
snprintf (buffer, sizeof(buffer), "(%s)", ci->ci_comment);
if (len + 1 + (cc = 2 + strlen (ci->ci_comment)) >= CPERLIN) {
vp = add ("\n\t", vp);
len = 8;
} else {
vp = add (" ", vp);
len++;
}
vp = add (buffer, vp);
len += cc;
}
vp = add ("\n", vp);
add_header (ct, np, vp);
/*
* output the Content-ID
*/
if (ct->c_id) {
np = add (ID_FIELD, NULL);
vp = concat (" ", ct->c_id, NULL);
add_header (ct, np, vp);
}
/*
* output the Content-Description
*/
if (ct->c_descr) {
np = add (DESCR_FIELD, NULL);
vp = concat (" ", ct->c_descr, NULL);
add_header (ct, np, vp);
}
skip_headers:
/*
* If this is the internal content structure for a
* "message/external", then we are done with the
* headers (since it has no body).
*/
if (ct->c_ctexbody)
return OK;
/*
* output the Content-MD5
*/
if (checksw) {
np = add (MD5_FIELD, NULL);
vp = calculate_digest (ct, (ct->c_encoding == CE_QUOTED) ? 1 : 0);
add_header (ct, np, vp);
}
/*
* output the Content-Transfer-Encoding
*/
switch (ct->c_encoding) {
case CE_7BIT:
/* Nothing to output */
#if 0
np = add (ENCODING_FIELD, NULL);
vp = concat (" ", "7bit", "\n", NULL);
add_header (ct, np, vp);
#endif
break;
case CE_8BIT:
if (ct->c_type == CT_MESSAGE)
adios (NULL, "internal error, invalid encoding");
np = add (ENCODING_FIELD, NULL);
vp = concat (" ", "8bit", "\n", NULL);
add_header (ct, np, vp);
break;
case CE_QUOTED:
if (ct->c_type == CT_MESSAGE || ct->c_type == CT_MULTIPART)
adios (NULL, "internal error, invalid encoding");
np = add (ENCODING_FIELD, NULL);
vp = concat (" ", "quoted-printable", "\n", NULL);
add_header (ct, np, vp);
break;
case CE_BASE64:
if (ct->c_type == CT_MESSAGE || ct->c_type == CT_MULTIPART)
adios (NULL, "internal error, invalid encoding");
np = add (ENCODING_FIELD, NULL);
vp = concat (" ", "base64", "\n", NULL);
add_header (ct, np, vp);
break;
case CE_BINARY:
if (ct->c_type == CT_MESSAGE)
adios (NULL, "internal error, invalid encoding");
np = add (ENCODING_FIELD, NULL);
vp = concat (" ", "binary", "\n", NULL);
add_header (ct, np, vp);
break;
default:
adios (NULL, "unknown transfer encoding in content");
break;
}
/*
* Additional content specific header processing
*/
switch (ct->c_type) {
case CT_MULTIPART:
{
struct multipart *m;
struct part *part;
m = (struct multipart *) ct->c_ctparams;
for (part = m->mp_parts; part; part = part->mp_next) {
CT p;
p = part->mp_part;
build_headers (p);
}
}
break;
case CT_MESSAGE:
if (ct->c_subtype == MESSAGE_EXTERNAL) {
struct exbody *e;
e = (struct exbody *) ct->c_ctparams;
build_headers (e->eb_content);
}
break;
default:
/* Nothing to do */
break;
}
return OK;
}
static char nib2b64[0x40+1] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static char *
calculate_digest (CT ct, int asciiP)
{
int cc;
char buffer[BUFSIZ], *vp, *op;
unsigned char *dp;
unsigned char digest[16];
unsigned char outbuf[25];
FILE *in;
MD5_CTX mdContext;
CE ce = ct->c_cefile;
/* open content */
if ((in = fopen (ce->ce_file, "r")) == NULL)
adios (ce->ce_file, "unable to open for reading");
/* Initialize md5 context */
MD5Init (&mdContext);
/* calculate md5 message digest */
if (asciiP) {
while (fgets (buffer, sizeof(buffer) - 1, in)) {
char c, *cp;
cp = buffer + strlen (buffer) - 1;
if ((c = *cp) == '\n')
*cp = '\0';
MD5Update (&mdContext, (unsigned char *) buffer,
(unsigned int) strlen (buffer));
if (c == '\n')
MD5Update (&mdContext, (unsigned char *) "\r\n", 2);
}
} else {
while ((cc = fread (buffer, sizeof(*buffer), sizeof(buffer), in)) > 0)
MD5Update (&mdContext, (unsigned char *) buffer, (unsigned int) cc);
}
/* md5 finalization. Write digest and zero md5 context */
MD5Final (digest, &mdContext);
/* close content */
fclose (in);
/* print debugging info */
if (debugsw) {
unsigned char *ep;
fprintf (stderr, "MD5 digest=");
for (ep = (dp = digest) + sizeof(digest) / sizeof(digest[0]);
dp < ep; dp++)
fprintf (stderr, "%02x", *dp & 0xff);
fprintf (stderr, "\n");
}
/* encode the digest using base64 */
for (dp = digest, op = outbuf, cc = sizeof(digest) / sizeof(digest[0]);
cc > 0; cc -= 3, op += 4) {
unsigned long bits;
char *bp;
bits = (*dp++ & 0xff) << 16;
if (cc > 1) {
bits |= (*dp++ & 0xff) << 8;
if (cc > 2)
bits |= *dp++ & 0xff;
}
for (bp = op + 4; bp > op; bits >>= 6)
*--bp = nib2b64[bits & 0x3f];
if (cc < 3) {
*(op + 3) = '=';
if (cc < 2)
*(op + 2) = '=';
}
}
/* null terminate string */
outbuf[24] = '\0';
/* now make copy and return string */
vp = concat (" ", outbuf, "\n", NULL);
return vp;
}
static int
readDigest (CT ct, char *cp)
{
int bitno, skip;
unsigned long bits;
char *bp = cp;
unsigned char *dp, value, *ep;
unsigned char *b, *b1, *b2, *b3;
b = (unsigned char *) &bits,
b1 = &b[endian > 0 ? 1 : 2],
b2 = &b[endian > 0 ? 2 : 1],
b3 = &b[endian > 0 ? 3 : 0];
bitno = 18;
bits = 0L;
skip = 0;
for (ep = (dp = ct->c_digest)
+ sizeof(ct->c_digest) / sizeof(ct->c_digest[0]); *cp; cp++)
switch (*cp) {
default:
if (skip
|| (*cp & 0x80)
|| (value = b642nib[*cp & 0x7f]) > 0x3f) {
if (debugsw)
fprintf (stderr, "invalid BASE64 encoding\n");
return NOTOK;
}
bits |= value << bitno;
test_end:
if ((bitno -= 6) < 0) {
if (dp + (3 - skip) > ep)
goto invalid_digest;
*dp++ = *b1;
if (skip < 2) {
*dp++ = *b2;
if (skip < 1)
*dp++ = *b3;
}
bitno = 18;
bits = 0L;
skip = 0;
}
break;
case '=':
if (++skip > 3)
goto self_delimiting;
goto test_end;
}
if (bitno != 18) {
if (debugsw)
fprintf (stderr, "premature ending (bitno %d)\n", bitno);
return NOTOK;
}
self_delimiting:
if (dp != ep) {
invalid_digest:
if (debugsw) {
while (*cp)
cp++;
fprintf (stderr, "invalid MD5 digest (got %d octets)\n",
cp - bp);
}
return NOTOK;
}
if (debugsw) {
fprintf (stderr, "MD5 digest=");
for (dp = ct->c_digest; dp < ep; dp++)
fprintf (stderr, "%02x", *dp & 0xff);
fprintf (stderr, "\n");
}
return OK;
}
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