/*
* mhparse.c -- routines to parse the contents of MIME messages
*
* $Id: mhparse.c,v 1.12 2005/11/06 00:32:20 pm215 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.
*/
#include <h/mh.h>
#include <fcntl.h>
#include <h/signals.h>
#include <h/md5.h>
#include <errno.h>
#include <setjmp.h>
#include <signal.h>
#include <h/mts.h>
#include <h/tws.h>
#include <h/mime.h>
#include <h/mhparse.h>
#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
extern int debugsw;
extern int endian; /* mhmisc.c */
extern pid_t xpid; /* mhshowsbr.c */
/* cache policies */
extern int rcachesw; /* mhcachesbr.c */
extern int wcachesw; /* mhcachesbr.c */
int checksw = 0; /* check Content-MD5 field */
/*
* Directory to place temp files. This must
* be set before these routines are called.
*/
char *tmp;
/*
* 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! */
};
/* ftpsbr.c */
int ftp_get (char *, char *, char *, char *, char *, char *, int, int);
/* mhcachesbr.c */
int find_cache (CT, int, int *, char *, char *, int);
/* mhmisc.c */
int part_ok (CT, int);
int type_ok (CT, int);
int make_intermediates (char *);
void content_error (char *, CT, char *, ...);
/* mhfree.c */
void free_content (CT);
void free_encoding (CT, int);
/*
* prototypes
*/
int pidcheck (int);
CT parse_mime (char *);
/*
* static prototypes
*/
static CT get_content (FILE *, char *, int);
static int add_header (CT, char *, char *);
static int get_ctinfo (char *, CT);
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_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 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, Init7Bit },
{ 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 entry point for parsing a MIME message or file.
* It returns the Content structure for the top level
* entity in the file.
*/
CT
parse_mime (char *file)
{
int is_stdin;
char buffer[BUFSIZ];
FILE *fp;
CT ct;
/*
* Check if file is actually standard input
*/
if ((is_stdin = !(strcmp (file, "-")))) {
file = add (m_tmpfil (invo_name), NULL);
if ((fp = fopen (file, "w+")) == NULL) {
advise (file, "unable to fopen for writing and reading");
return NULL;
}
chmod (file, 0600);
while (fgets (buffer, sizeof(buffer), stdin))
fputs (buffer, fp);
fflush (fp);
if (ferror (stdin)) {
unlink (file);
advise ("stdin", "error reading");
return NULL;
}
if (ferror (fp)) {
unlink (file);
advise (file, "error writing");
return NULL;
}
fseek (fp, 0L, SEEK_SET);
} else if ((fp = fopen (file, "r")) == NULL) {
advise (file, "unable to read");
return NULL;
}
if (!(ct = get_content (fp, file, 1))) {
if (is_stdin)
unlink (file);
advise (NULL, "unable to decode %s", file);
return NULL;
}
if (is_stdin)
ct->c_unlink = 1; /* temp file to remove */
ct->c_fp = NULL;
if (ct->c_end == 0L) {
fseek (fp, 0L, SEEK_END);
ct->c_end = ftell (fp);
}
if (ct->c_ctinitfnx && (*ct->c_ctinitfnx) (ct) == NOTOK) {
fclose (fp);
free_content (ct);
return NULL;
}
fclose (fp);
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
* NB: on failure we will fclose(in)!
*/
static CT
get_content (FILE *in, char *file, int toplevel)
{
int compnum, state;
char buf[BUFSIZ], name[NAMESZ];
char *np, *vp;
CT ct;
HF hp;
/* allocate the content structure */
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;
/*
* Parse the header fields for this
* content into a linked list.
*/
for (compnum = 1, state = FLD;;) {
switch (state = m_getfld (state, name, buf, sizeof(buf), in)) {
case FLD:
case FLDPLUS:
case FLDEOF:
compnum++;
/* 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);
/* continue, if this isn't the last header field */
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 out of the loop */
break;
}
/*
* Read the content headers. We will parse the
* MIME related header fields into their various
* structures and set internal flags related to
* content type/subtype, etc.
*/
hp = ct->c_first_hf; /* start at first header field */
while (hp) {
/* Get MIME-Version field */
if (!strcasecmp (hp->name, VRSN_FIELD)) {
int ucmp;
char c, *cp, *dp;
if (ct->c_vrsn) {
advise (NULL, "message %s has multiple %s: fields",
ct->c_file, VRSN_FIELD);
goto next_header;
}
ct->c_vrsn = add (hp->value, NULL);
/* Now, cleanup this field */
cp = ct->c_vrsn;
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);
}
}
else if (!strcasecmp (hp->name, TYPE_FIELD)) {
/* Get Content-Type field */
struct str2init *s2i;
CI ci = &ct->c_ctinfo;
/* Check if we've already seen a Content-Type header */
if (ct->c_ctline) {
advise (NULL, "message %s has multiple %s: fields",
ct->c_file, TYPE_FIELD);
goto next_header;
}
/* Parse the Content-Type field */
if (get_ctinfo (hp->value, ct) == 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;
}
else if (!strcasecmp (hp->name, ENCODING_FIELD)) {
/* Get Content-Transfer-Encoding field */
char c, *cp, *dp;
struct str2init *s2i;
/*
* Check if we've already seen the
* Content-Transfer-Encoding field
*/
if (ct->c_celine) {
advise (NULL, "message %s has multiple %s: fields",
ct->c_file, ENCODING_FIELD);
goto next_header;
}
/* get copy of this field */
ct->c_celine = cp = add (hp->value, NULL);
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;
}
else if (!strcasecmp (hp->name, MD5_FIELD)) {
/* Get Content-MD5 field */
char *cp, *dp, *ep;
if (!checksw)
goto next_header;
if (ct->c_digested) {
advise (NULL, "message %s has multiple %s: fields",
ct->c_file, MD5_FIELD);
goto next_header;
}
ep = cp = add (hp->value, NULL); /* get a copy */
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++;
}
else if (!strcasecmp (hp->name, ID_FIELD)) {
/* Get Content-ID field */
ct->c_id = add (hp->value, ct->c_id);
}
else if (!strcasecmp (hp->name, DESCR_FIELD)) {
/* Get Content-Description field */
ct->c_descr = add (hp->value, ct->c_descr);
}
next_header:
hp = hp->next; /* next header field */
}
/*
* 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) == 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) == 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;
}
/*
* Parse Content-Type line and fill in the
* information of the CTinfo structure.
*/
static int
get_ctinfo (char *cp, CT ct)
{
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 != '/') {
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;
}
/*
* Check if anything is left over
*/
if (*cp) {
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 buffer[BUFSIZ];
char *chset;
char **ap, **ep, *cp;
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 structure */
if ((t = (struct text *) calloc (1, sizeof(*t))) == NULL)
adios (NULL, "out of memory");
ct->c_ctparams = (void *) t;
/* scan for charset parameter */
for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++)
if (!strcasecmp (*ap, "charset"))
break;
if (*ap)
chset = *ep;
else
chset = "US-ASCII"; /* default for text */
/* match character set, or set to unknown */
for (kv = Charset; kv->kv_key; kv++)
if (!strcasecmp (chset, kv->kv_key))
break;
t->tx_charset = kv->kv_value;
/*
* If we can not handle character set natively,
* then check profile for string to modify the
* terminal or display method.
*/
if (!check_charset (chset, strlen (chset))) {
snprintf (buffer, sizeof(buffer), "%s-charset-%s", invo_name, chset);
if ((cp = context_find (buffer)))
ct->c_termproc = getcpy (cp);
}
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.
*/
bp = 0;
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,
ct->c_subtype == MULTI_DIGEST ? -1 : 0))) {
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(partnum), "%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))) {
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;
}
/*
* 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];
/* sbeck -- handle prefixes */
CI ci;
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;
}
/* sbeck@cise.ufl.edu -- handle suffixes */
ci = &ct->c_ctinfo;
snprintf (buffer, sizeof(buffer), "%s-suffix-%s/%s",
invo_name, ci->ci_type, ci->ci_subtype);
cp = context_find (buffer);
if (cp == NULL || *cp == '\0') {
snprintf (buffer, sizeof(buffer), "%s-suffix-%s", invo_name,
ci->ci_type);
cp = context_find (buffer);
}
if (cp != NULL && *cp != '\0')
ce->ce_file = add (cp, ce->ce_file);
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;
/* sbeck -- handle prefixes */
CI ci;
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;
}
/* sbeck@cise.ufl.edu -- handle suffixes */
ci = &ct->c_ctinfo;
snprintf (buffer, sizeof(buffer), "%s-suffix-%s/%s",
invo_name, ci->ci_type, ci->ci_subtype);
cp = context_find (buffer);
if (cp == NULL || *cp == '\0') {
snprintf (buffer, sizeof(buffer), "%s-suffix-%s", invo_name,
ci->ci_type);
cp = context_find (buffer);
}
if (cp != NULL && *cp != '\0')
ce->ce_file = add (cp, ce->ce_file);
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 ((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];
/* sbeck -- handle prefixes */
char *cp;
CI ci;
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;
}
/* sbeck@cise.ufl.edu -- handle suffixes */
ci = &ct->c_ctinfo;
snprintf (buffer, sizeof(buffer), "%s-suffix-%s/%s",
invo_name, ci->ci_type, ci->ci_subtype);
cp = context_find (buffer);
if (cp == NULL || *cp == '\0') {
snprintf (buffer, sizeof(buffer), "%s-suffix-%s", invo_name,
ci->ci_type);
cp = context_find (buffer);
}
if (cp != NULL && *cp != '\0')
ce->ce_file = add (cp, ce->ce_file);
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;
}
if (ct->c_showproc)
free (ct->c_showproc);
ct->c_showproc = add ("true", NULL);
fseek (ce->ce_fp, 0L, SEEK_SET);
*file = ce->ce_file;
return fileno (ce->ce_fp);
}
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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