+++ /dev/null
-/*
- * Copyright (c) 1996-2012 by the citadel.org team
- *
- * This program is open source software. You can redistribute it and/or
- * modify it under the terms of the GNU General Public License, version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include "webcit.h"
-#ifdef HAVE_ICONV
-
-/*
- * Wrapper around iconv_open()
- * Our version adds aliases for non-standard Microsoft charsets
- * such as 'MS950', aliasing them to names like 'CP950'
- *
- * tocode Target encoding
- * fromcode Source encoding
- * /
-iconv_t ctdl_iconv_open(const char *tocode, const char *fromcode)
-{
- iconv_t ic = (iconv_t)(-1) ;
- ic = iconv_open(tocode, fromcode);
- if (ic == (iconv_t)(-1) ) {
- char alias_fromcode[64];
- if ( (strlen(fromcode) == 5) && (!strncasecmp(fromcode, "MS", 2)) ) {
- safestrncpy(alias_fromcode, fromcode, sizeof alias_fromcode);
- alias_fromcode[0] = 'C';
- alias_fromcode[1] = 'P';
- ic = iconv_open(tocode, alias_fromcode);
- }
- }
- return(ic);
-}
-*/
-
-
-static inline char *FindNextEnd (char *bptr)
-{
- char * end;
- /* Find the next ?Q? */
- end = strchr(bptr + 2, '?');
- if (end == NULL) return NULL;
- if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) &&
- (*(end + 2) == '?')) {
- /* skip on to the end of the cluster, the next ?= */
- end = strstr(end + 3, "?=");
- }
- else
- /* sort of half valid encoding, try to find an end. */
- end = strstr(bptr, "?=");
- return end;
-}
-
-/*
- * Handle subjects with RFC2047 encoding such as:
- * =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
- */
-void utf8ify_rfc822_string(char **buf) {
- char *start, *end, *next, *nextend, *ptr;
- char newbuf[1024];
- char charset[128];
- char encoding[16];
- char istr[1024];
- iconv_t ic = (iconv_t)(-1) ;
- char *ibuf; /* Buffer of characters to be converted */
- char *obuf; /* Buffer for converted characters */
- size_t ibuflen; /* Length of input buffer */
- size_t obuflen; /* Length of output buffer */
- char *isav; /* Saved pointer to input buffer */
- char *osav; /* Saved pointer to output buffer */
- int passes = 0;
- int i, len, delta;
- int illegal_non_rfc2047_encoding = 0;
-
- /* Sometimes, badly formed messages contain strings which were simply
- * written out directly in some foreign character set instead of
- * using RFC2047 encoding. This is illegal but we will attempt to
- * handle it anyway by converting from a user-specified default
- * charset to UTF-8 if we see any nonprintable characters.
- */
- len = strlen(*buf);
- for (i=0; i<len; ++i) {
- if (((*buf)[i] < 32) || ((*buf)[i] > 126)) {
- illegal_non_rfc2047_encoding = 1;
- i = len; /*< take a shortcut, it won't be more than one. */
- }
- }
- if (illegal_non_rfc2047_encoding) {
- StrBuf *default_header_charset;
- get_preference("default_header_charset", &default_header_charset);
- if ( (strcasecmp(ChrPtr(default_header_charset), "UTF-8")) &&
- (strcasecmp(ChrPtr(default_header_charset), "us-ascii")) ) {
- ctdl_iconv_open("UTF-8", ChrPtr(default_header_charset), &ic);
- if (ic != (iconv_t)(-1) ) {
- ibuf = malloc(1024);
- isav = ibuf;
- safestrncpy(ibuf, *buf, 1023);
- ibuflen = strlen(ibuf);
- obuflen = 1024;
- obuf = (char *) malloc(obuflen);
- osav = obuf;
- iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
- osav[1023-obuflen] = 0;
- free(*buf);
- *buf = osav;
- iconv_close(ic);
- free(isav);
- }
- }
- }
-
- /* pre evaluate the first pair */
- nextend = end = NULL;
- len = strlen(*buf);
- start = strstr(*buf, "=?");
- if (start != NULL)
- end = FindNextEnd (start);
-
- while ((start != NULL) && (end != NULL))
- {
- next = strstr(end, "=?");
- if (next != NULL)
- nextend = FindNextEnd(next);
- if (nextend == NULL)
- next = NULL;
-
- /* did we find two partitions */
- if ((next != NULL) &&
- ((next - end) > 2))
- {
- ptr = end + 2;
- while ((ptr < next) &&
- (isspace(*ptr) ||
- (*ptr == '\r') ||
- (*ptr == '\n') ||
- (*ptr == '\t')))
- ptr ++;
- /* did we find a gab just filled with blanks? */
- if (ptr == next)
- {
- memmove (end + 2,
- next,
- len - (next - start));
-
- /* now terminate the gab at the end */
- delta = (next - end) - 2;
- len -= delta;
- (*buf)[len] = '\0';
-
- /* move next to its new location. */
- next -= delta;
- nextend -= delta;
- }
- }
- /* our next-pair is our new first pair now. */
- start = next;
- end = nextend;
- }
-
- /* Now we handle foreign character sets properly encoded
- * in RFC2047 format.
- */
- while (start=strstr((*buf), "=?"), end=FindNextEnd((start != NULL)? start : (*buf)),
- ((start != NULL) && (end != NULL) && (end > start)) )
- {
- extract_token(charset, start, 1, '?', sizeof charset);
- extract_token(encoding, start, 2, '?', sizeof encoding);
- extract_token(istr, start, 3, '?', sizeof istr);
-
- ibuf = malloc(1024);
- isav = ibuf;
- if (!strcasecmp(encoding, "B")) { /* base64 */
- ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
- }
- else if (!strcasecmp(encoding, "Q")) { /* quoted-printable */
- size_t len;
- long pos;
-
- len = strlen(istr);
- pos = 0;
- while (pos < len)
- {
- if (istr[pos] == '_') istr[pos] = ' ';
- pos++;
- }
-
- ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
- }
- else {
- strcpy(ibuf, istr); /* unknown encoding */
- ibuflen = strlen(istr);
- }
-
- ctdl_iconv_open("UTF-8", charset, &ic);
- if (ic != (iconv_t)(-1) ) {
- obuflen = 1024;
- obuf = (char *) malloc(obuflen);
- osav = obuf;
- iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
- osav[1024-obuflen] = 0;
-
- end = start;
- end++;
- strcpy(start, "");
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- strcpy(end, &end[1]);
-
- snprintf(newbuf, sizeof newbuf, "%s%s%s", *buf, osav, end);
- strcpy(*buf, newbuf);
-
- free(osav);
- iconv_close(ic);
- }
- else {
- end = start;
- end++;
- strcpy(start, "");
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- strcpy(end, &end[1]);
-
- snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", *buf, end);
- strcpy(*buf, newbuf);
- }
-
- free(isav);
-
- /*
- * Since spammers will go to all sorts of absurd lengths to get their
- * messages through, there are LOTS of corrupt headers out there.
- * So, prevent a really badly formed RFC2047 header from throwing
- * this function into an infinite loop.
- */
- ++passes;
- if (passes > 20) return;
- }
-
-}
-#else
-inline void utf8ify_rfc822_string(char **a){};
-
-#endif
-
-
-
-
-/*
- * RFC2047-encode a header field if necessary.
- * If no non-ASCII characters are found, the string will be copied verbatim without encoding.
- * Returns encoded length; -1 if non success.
- *
- * target Target buffer.
- * maxlen Maximum size of target buffer.
- * source Source string to be encoded.
- * SourceLen Length of the source string
- */
-int webcit_rfc2047encode(char *target, int maxlen, char *source, long SourceLen)
-{
- const char headerStr[] = "=?UTF-8?Q?";
- int need_to_encode = 0;
- int i = 0;
- int len;
- unsigned char ch;
-
- if ((source == NULL) ||
- (target == NULL) ||
- (SourceLen > maxlen)) return -1;
-
- while ((!IsEmptyStr (&source[i])) &&
- (need_to_encode == 0) &&
- (i < SourceLen) ) {
- if (((unsigned char) source[i] < 32) ||
- ((unsigned char) source[i] > 126)) {
- need_to_encode = 1;
- }
- i++;
- }
-
- if (!need_to_encode) {
- memcpy (target, source, SourceLen);
- target[SourceLen] = '\0';
- return SourceLen;
- }
-
- if (sizeof (headerStr + SourceLen + 2) > maxlen)
- return -1;
- memcpy (target, headerStr, sizeof (headerStr));
- len = sizeof (headerStr) - 1;
- for (i=0; (i < SourceLen) && (len + 3< maxlen) ; ++i) {
- ch = (unsigned char) source[i];
- if ((ch < 32) || (ch > 126) || (ch == 61)) {
- sprintf(&target[len], "=%02X", ch);
- len += 3;
- }
- else {
- sprintf(&target[len], "%c", ch);
- len ++;
- }
- }
-
- if (len + 2 < maxlen) {
- strcat(&target[len], "?=");
- len +=2;
- return len;
- }
- else
- return -1;
-}
-
projects / citadel.git / blobdiff