+
+/*
+ * mhbuildsbr.c -- routines to expand/translate MIME composition files
+ *
+ * $Id$
+ */
+
+/*
+ * 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 <zotnet/mts/mts.h>
+#include <zotnet/tws/tws.h>
+#include <h/mime.h>
+#include <h/mhparse.h>
+
+#ifdef HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+#endif
+
+
+extern int errno;
+
+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);
+ done (1);
+ /* NOTREACHED */
+}
+
+
+/*
+ * 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) {
+ admonish (NULL,
+ "\"%s/%s\" type in message %s should be encoded in 7bit",
+ 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;
+}
projects / mmh / commitdiff