From 950484a63f150baa24910acae07bd091b846b8f9 Mon Sep 17 00:00:00 2001
From: rswindell <>
Date: Thu, 20 Dec 2001 01:32:24 +0000
Subject: [PATCH] Marc's mime encoding routines.
---
src/sbbs3/mime.c | 214 +++++++++++++++++++++++++++++++++++++++++++++++
src/sbbs3/mime.h | 47 +++++++++++
2 files changed, 261 insertions(+)
create mode 100644 src/sbbs3/mime.c
create mode 100644 src/sbbs3/mime.h
diff --git a/src/sbbs3/mime.c b/src/sbbs3/mime.c
new file mode 100644
index 0000000000..c827d894a5
--- /dev/null
+++ b/src/sbbs3/mime.c
@@ -0,0 +1,214 @@
+/* mime.c */
+
+/* Synchronet message creation routines */
+
+/* $Id$ */
+
+/****************************************************************************
+ * @format.tab-size 4 (Plain Text/Source Code File Header) *
+ * @format.use-tabs true (see http://www.synchro.net/ptsc_hdr.html) *
+ * *
+ * Copyright 2000 Rob Swindell - http://www.synchro.net/copyright.html *
+ * *
+ * This program is free software; you can redistribute it and/or *
+ * modify it under the terms of the GNU General Public License *
+ * as published by the Free Software Foundation; either version 2 *
+ * of the License, or (at your option) any later version. *
+ * See the GNU General Public License for more details: gpl.txt or *
+ * http://www.fsf.org/copyleft/gpl.html *
+ * *
+ * Anonymous FTP access to the most recent released source is available at *
+ * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net *
+ * *
+ * Anonymous CVS access to the development source and modification history *
+ * is available at cvs.synchro.net:/cvsroot/sbbs, example: *
+ * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login *
+ * (just hit return, no password is necessary) *
+ * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src *
+ * *
+ * For Synchronet coding style and modification guidelines, see *
+ * http://www.synchro.net/source.html *
+ * *
+ * You are encouraged to submit any modifications (preferably in Unix diff *
+ * format) via e-mail to mods@synchro.net *
+ * *
+ * Note: If this box doesn't appear square, then you need to fix your tabs. *
+ ****************************************************************************/
+
+/* See RFCs 1521,2045,2046,2047,2048,2049,1590 */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+#include "sbbs.h"
+#include "mailsrvr.h"
+
+#define SIZEOF_MIMEBOUNDARY 36
+#define BASE64_BITMASK 0x0000003F
+
+static const char * base64alphabet =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+
+static void tobase64(char * in, char * out, int bytesread);
+
+char * mimegetboundary()
+{
+ int i, num;
+ char * boundaryString = (char *)malloc(SIZEOF_MIMEBOUNDARY + 1);
+
+ srand(time(NULL));
+ if (boundaryString == NULL)
+ return NULL;
+ for (i=0;i<SIZEOF_MIMEBOUNDARY;i++) {
+ num=(rand()%62);
+ if(num<10)
+ num+=48;
+ else if(num>=10 && num<36)
+ num+=55;
+ else
+ num+=61;
+ boundaryString[i]=(char)num;
+ }
+ boundaryString[i]='\0';
+ return boundaryString;
+}
+
+void mimeheaders(SOCKET socket, char * boundary)
+{
+ char bndline[50];
+ sockprintf(socket,"MIME-Version: 1.0");
+ sockprintf(socket,"Content-Type: multipart/mixed;");
+ strcpy(bndline," boundary=\"");
+ strcat(bndline,boundary);
+ strcat(bndline,"\"");
+ sockprintf(socket,bndline);
+}
+
+void mimeblurb(SOCKET socket, char * boundary)
+{
+ sockprintf(socket,"This is a MIME blurb. You shouldn't be seeing this!");
+ sockprintf(socket,"");
+}
+
+void mimetextpartheader(SOCKET socket, char * boundary)
+{
+ char bndline[50];
+
+ strcpy(bndline,"--");
+ strcat(bndline,boundary);
+ sockprintf(socket,bndline);
+ sockprintf(socket,"Content-Type: text/plain;");
+ sockprintf(socket," charset=\"iso-8859-1\"");
+ sockprintf(socket,"Content-Transfer-Encoding: 7bit");
+}
+
+BOOL base64out(SOCKET socket, char * pathfile)
+{
+ FILE * fp;
+ char in[3]={0};
+ char out[5]; /* one for the '\0' */
+ char line[77]; /* one for the '\0' */
+ int bytesread;
+ int i = 0;
+
+ if((fp=fopen(pathfile,"rb"))==NULL)
+ return(FALSE);
+ while(1) {
+ bytesread=fread(in,1,3,fp);
+ tobase64(in,out,bytesread);
+ if(i==0)
+ strcpy(line,out);
+ else
+ strcat(line,out);
+ if(i==18) {
+ sockprintf(socket,line);
+ i=-1;
+ }
+ if(bytesread!=3 || feof(fp))
+ break;
+ i++;
+ memset(in,0,3);
+ }
+ if(i!=-1) /* already printed the last line */
+ sockprintf(socket,line);
+ sockprintf(socket,"");
+ return(TRUE);
+}
+
+BOOL mimeattach(SOCKET socket, char * boundary, char * pathfile)
+{
+ char bndline[41];
+ char * fname = getfname(pathfile);
+ char * line = (char*)MALLOC(strlen(fname) + 20);
+
+ if(line==NULL)
+ return(FALSE);
+
+ strcpy(bndline,"--");
+ strcat(bndline,boundary);
+ sockprintf(socket,bndline);
+ sockprintf(socket,"Content-Type: application/octet-stream;");
+ strcpy(line," name=\"");
+ strcat(line,fname);
+ strcat(line,"\"");
+ sockprintf(socket,line);
+ sockprintf(socket,"Content-Transfer-Encoding: base64");
+ sockprintf(socket,"Content-Disposition: attachment;");
+ strcpy(line," filename=\"");
+ strcat(line,fname);
+ strcat(line,"\"");
+ sockprintf(socket,line);
+ sockprintf(socket,"");
+ if(!base64out(socket,pathfile))
+ return(FALSE);
+ sockprintf(socket,"");
+ FREE(line);
+ return(TRUE);
+}
+
+void endmime(SOCKET socket, char * boundary)
+{
+ char bndline[41];
+
+ strcpy(bndline,"--");
+ strcat(bndline,boundary);
+ strcat(bndline,"--"); /* last boundary */
+ sockprintf(socket,bndline);
+ sockprintf(socket,"");
+}
+
+static void tobase64(char * in, char * out, int bytesread)
+{
+#define BITCAST_MASK 0x000000FF
+ unsigned int tmpnum0 = ((unsigned int)in[0])&BITCAST_MASK;
+ unsigned int tmpnum1 = ((unsigned int)in[1])&BITCAST_MASK;
+ unsigned int data = ((unsigned int)in[2])&BITCAST_MASK;
+
+ data|=(tmpnum1<<8);
+ data|=(tmpnum0<<16);
+ if(bytesread==0) {
+ out[0]='\0';
+ return;
+ }
+ out[4]='\0';
+ out[3]=base64alphabet[(data&BASE64_BITMASK)];
+ out[2]=base64alphabet[((data>>6)&BASE64_BITMASK)];
+ out[1]=base64alphabet[((data>>12)&BASE64_BITMASK)];
+ out[0]=base64alphabet[((data>>18)&BASE64_BITMASK)];
+ if(bytesread==1) {
+ /* pad last bytes */
+ out[3]=base64alphabet[64];
+ out[2]=base64alphabet[64];
+ }
+ else if(bytesread==2)
+ out[3]=base64alphabet[64];
+
+#undef BITCAST_MASK
+}
+
+
+
+
+
+
diff --git a/src/sbbs3/mime.h b/src/sbbs3/mime.h
new file mode 100644
index 0000000000..b009d3c72b
--- /dev/null
+++ b/src/sbbs3/mime.h
@@ -0,0 +1,47 @@
+/* mime.h */
+
+/* $Id$ */
+
+/****************************************************************************
+ * @format.tab-size 4 (Plain Text/Source Code File Header) *
+ * @format.use-tabs true (see http://www.synchro.net/ptsc_hdr.html) *
+ * *
+ * Copyright 2000 Rob Swindell - http://www.synchro.net/copyright.html *
+ * *
+ * This program is free software; you can redistribute it and/or *
+ * modify it under the terms of the GNU General Public License *
+ * as published by the Free Software Foundation; either version 2 *
+ * of the License, or (at your option) any later version. *
+ * See the GNU General Public License for more details: gpl.txt or *
+ * http://www.fsf.org/copyleft/gpl.html *
+ * *
+ * Anonymous FTP access to the most recent released source is available at *
+ * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net *
+ * *
+ * Anonymous CVS access to the development source and modification history *
+ * is available at cvs.synchro.net:/cvsroot/sbbs, example: *
+ * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login *
+ * (just hit return, no password is necessary) *
+ * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src *
+ * *
+ * For Synchronet coding style and modification guidelines, see *
+ * http://www.synchro.net/source.html *
+ * *
+ * You are encouraged to submit any modifications (preferably in Unix diff *
+ * format) via e-mail to mods@synchro.net *
+ * *
+ * Note: If this box doesn't appear square, then you need to fix your tabs. *
+ ****************************************************************************/
+
+#ifndef _MIME_H_
+#define _MIME_H_
+
+/* mime.c */
+char * mimegetboundary();
+void mimeheaders(SOCKET socket, char * boundary);
+void mimeblurb(SOCKET socket, char * boundary);
+void mimetextpartheader(SOCKET socket, char * boundary);
+BOOL mimeattach(SOCKET socket, char * boundary, char * pathfile);
+void endmime(SOCKET socket, char * boundary);
+
+#endif /* Don't add anything after this line */
\ No newline at end of file
--
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