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edhill |
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/* (C) Copyright 1993,1994 by Carnegie Mellon University |
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* All Rights Reserved. |
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* |
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* Permission to use, copy, modify, distribute, and sell this software |
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* and its documentation for any purpose is hereby granted without |
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* fee, provided that the above copyright notice appear in all copies |
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* and that both that copyright notice and this permission notice |
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* appear in supporting documentation, and that the name of Carnegie |
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* Mellon University not be used in advertising or publicity |
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* pertaining to distribution of the software without specific, |
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* written prior permission. Carnegie Mellon University makes no |
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* representations about the suitability of this software for any |
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* purpose. It is provided "as is" without express or implied |
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* warranty. |
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* |
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* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO |
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
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* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE |
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* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN |
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* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING |
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
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* SOFTWARE. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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extern char *magic_look(FILE *infile); |
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extern char *os_genid(void); |
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extern FILE *os_createnewfile(char *fname); |
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extern char *md5digest(FILE *infile, long int *len); |
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extern void os_perror(char *str); |
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extern int to64(FILE *infile, FILE *outfile, long int limit); |
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#define NUMREFERENCES 4 |
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int attachment; |
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/* |
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* Encode a file into one or more MIME messages, each |
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* no larger than 'maxsize'. A 'maxsize' of zero means no size limit. |
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* If 'applefile' is non-null, it is the first part of a multipart/appledouble |
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* pair. |
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*/ |
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int encode(FILE *infile, FILE *applefile, char *fname, FILE *descfile, char *subject, char *headers, long int maxsize, char *typeoverride, char *outfname) |
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{ |
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char *type; |
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FILE *outfile; |
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char *cleanfname, *p; |
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char *digest, *appledigest = NULL; |
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long filesize, l, written; |
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int thispart, numparts = 1; |
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int wrotefiletype = 0; |
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char *multipartid, *msgid, *referenceid[NUMREFERENCES]; |
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char buf[1024]; |
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int i; |
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/* Clean up fname for printing */ |
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cleanfname = fname; |
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#ifdef __riscos |
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/* This filename-cleaning knowledge will probably |
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* be moved to the os layer in a future version. |
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*/ |
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if ((p = strrchr(cleanfname, '.'))) cleanfname = p+1; |
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#else |
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if ((p = strrchr(cleanfname, '/'))) cleanfname = p+1; |
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if ((p = strrchr(cleanfname, '\\'))) cleanfname = p+1; |
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#endif |
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if ((p = strrchr(cleanfname, ':'))) cleanfname = p+1; |
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/* Find file type */ |
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if (typeoverride) { |
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type = typeoverride; |
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} |
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else { |
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type = magic_look(infile); |
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} |
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/* Compute MD5 digests */ |
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digest = md5digest(infile, &filesize); |
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if (applefile) { |
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appledigest = md5digest(applefile, &l); |
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filesize += l; |
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} |
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/* See if we have to do multipart */ |
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if (maxsize) { |
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filesize = (filesize / 54) * 73; /* Allow for base64 expansion */ |
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/* Add in size of desc file */ |
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if (descfile) { |
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free(md5digest(descfile, &l)); /* XXX */ |
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filesize += l; |
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} |
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numparts = (filesize-1000)/maxsize + 1; |
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if (numparts < 1) numparts = 1; |
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} |
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multipartid = os_genid(); |
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for (i=0; i<NUMREFERENCES; i++) { |
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referenceid[i] = 0; |
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} |
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for (thispart=1; thispart <= numparts; thispart++) { |
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written = 0; |
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/* Open output file */ |
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if (numparts == 1) { |
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outfile = os_createnewfile(outfname); |
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} |
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else { |
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#ifdef __riscos |
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/* Arrgh, riscos uses '.' as directory separator */ |
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sprintf(buf, "%s/%02d", outfname, thispart); |
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#else |
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sprintf(buf, "%s.%02d", outfname, thispart); |
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#endif |
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outfile = os_createnewfile(buf); |
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} |
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if (!outfile) { |
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os_perror(buf); |
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return 1; |
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} |
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msgid = os_genid(); |
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fprintf(outfile, "Message-ID: <%s>\n", msgid); |
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fprintf(outfile, "Mime-Version: 1.0\n"); |
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if (headers) fputs(headers, outfile); |
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if (numparts > 1) { |
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fprintf(outfile, "Subject: %s (%02d/%02d)\n", subject, |
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thispart, numparts); |
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if (thispart == 1) { |
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referenceid[0] = msgid; |
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} |
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else { |
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/* Put out References: header pointing to previous parts */ |
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fprintf(outfile, "References: <%s>\n", referenceid[0]); |
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for (i=1; i<NUMREFERENCES; i++) { |
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if (referenceid[i]) fprintf(outfile, "\t <%s>\n", |
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referenceid[i]); |
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} |
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for (i=2; i<NUMREFERENCES; i++) { |
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referenceid[i-1] = referenceid[i]; |
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} |
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referenceid[NUMREFERENCES-1] = msgid; |
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} |
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fprintf(outfile, |
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"Content-Type: message/partial; number=%d; total=%d;\n", |
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thispart, numparts); |
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fprintf(outfile, "\t id=\"%s\"\n", multipartid); |
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fprintf(outfile, "\n"); |
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} |
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if (thispart == 1) { |
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if (numparts > 1) { |
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fprintf(outfile, "Message-ID: <%s>\n", multipartid); |
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fprintf(outfile, "MIME-Version: 1.0\n"); |
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} |
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fprintf(outfile, "Subject: %s\n", subject); |
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fprintf(outfile, |
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"Content-Type: multipart/mixed; boundary=\"-\"\n"); |
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fprintf(outfile, |
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"\nThis is a MIME encoded message. Decode it with \"munpack\"\n"); |
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fprintf(outfile, |
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"or any other MIME reading software. Mpack/munpack is available\n"); |
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fprintf(outfile, |
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"via anonymous FTP in ftp.andrew.cmu.edu:pub/mpack/\n"); |
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written = 300; |
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/* Spit out description section */ |
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if (descfile) { |
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fprintf(outfile, "---\n\n"); |
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while (fgets(buf, sizeof(buf), descfile)) { |
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/* Strip multiple leading dashes as they may become MIME |
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* boundaries |
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*/ |
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p = buf; |
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if (*p == '-') { |
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while (p[1] == '-') p++; |
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} |
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fputs(p, outfile); |
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written += strlen(p); |
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} |
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fprintf(outfile, "\n"); |
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} |
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fprintf(outfile, "---\n"); |
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if (applefile) { |
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fprintf(outfile, |
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"Content-Type: multipart/appledouble; boundary=\"=\"; name=\"%s\"\n", |
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cleanfname); |
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fprintf(outfile, |
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"Content-Disposition: %s; filename=\"%s\"\n", |
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attachment ? "attachment" : "inline", cleanfname); |
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fprintf(outfile, "\n\n--=\n"); |
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fprintf(outfile, "Content-Type: application/applefile\n"); |
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fprintf(outfile, "Content-Transfer-Encoding: base64\n"); |
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fprintf(outfile, "Content-MD5: %s\n\n", appledigest); |
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free(appledigest); |
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written += 100; |
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} |
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} |
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if (applefile && !feof(applefile)) { |
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if (written == maxsize) written--; /* avoid a nasty fencepost error */ |
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written += to64(applefile, outfile, |
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(thispart == numparts) ? 0 : (maxsize-written)); |
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if (!feof(applefile)) { |
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fclose(outfile); |
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continue; |
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} |
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fprintf(outfile, "\n--=\n"); |
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} |
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if (!wrotefiletype++) { |
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fprintf(outfile, "Content-Type: %s; name=\"%s\"\n", type, |
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cleanfname); |
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fprintf(outfile, "Content-Transfer-Encoding: base64\n"); |
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fprintf(outfile, "Content-Disposition: %s; filename=\"%s\"\n", |
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attachment ? "attachment" : "inline", cleanfname); |
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fprintf(outfile, "Content-MD5: %s\n\n", digest); |
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free(digest); |
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written += 80; |
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} |
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if (written == maxsize) written--; /* avoid a nasty fencepost error */ |
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written += to64(infile, outfile, |
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(thispart == numparts) ? 0 : (maxsize-written)); |
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if (thispart == numparts) { |
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if (applefile) fprintf(outfile, "\n--=--\n"); |
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fprintf(outfile, "\n-----\n"); |
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} |
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fclose(outfile); |
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} |
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return 0; |
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} |