-/* $Cambridge: exim/src/src/mime.c,v 1.6 2005/03/08 16:57:28 ph10 Exp $ */
+/* $Cambridge: exim/src/src/mime.c,v 1.15 2006/09/05 15:34:41 ph10 Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
0-255 - char to write
*/
-unsigned int mime_qp_hstr_i(uschar *cptr) {
- unsigned int i, j = 0;
- while (cptr && *cptr && isxdigit(*cptr)) {
- i = *cptr++ - '0';
- if (9 < i) i -= 7;
- j <<= 4;
- j |= (i & 0x0f);
- }
- return(j);
-}
-
-uschar *mime_decode_qp_char(uschar *qp_p,int *c) {
- uschar hex[] = {0,0,0};
- int nan = 0;
+uschar *mime_decode_qp_char(uschar *qp_p, int *c) {
uschar *initial_pos = qp_p;
/* advance one char */
qp_p++;
- REPEAT_FIRST:
- if ( (*qp_p == '\t') || (*qp_p == ' ') || (*qp_p == '\r') ) {
- /* tab or whitespace may follow
- just ignore it, but remember
- that this is not a valid hex
- encoding any more */
- nan = 1;
+ /* Check for two hex digits and decode them */
+ if (isxdigit(*qp_p) && isxdigit(qp_p[1])) {
+ /* Do hex conversion */
+ if (isdigit(*qp_p)) {*c = *qp_p - '0';}
+ else {*c = toupper(*qp_p) - 'A' + 10;};
+ *c <<= 4;
+ if (isdigit(qp_p[1])) {*c |= qp_p[1] - '0';}
+ else {*c |= toupper(qp_p[1]) - 'A' + 10;};
+ return qp_p + 2;
+ };
+
+ /* tab or whitespace may follow just ignore it if it precedes \n */
+ while (*qp_p == '\t' || *qp_p == ' ' || *qp_p == '\r')
qp_p++;
- goto REPEAT_FIRST;
- }
- else if ( (('0' <= *qp_p) && (*qp_p <= '9')) || (('A' <= *qp_p) && (*qp_p <= 'F')) || (('a' <= *qp_p) && (*qp_p <= 'f')) ) {
- /* this is a valid hex char, if nan is unset */
- if (nan) {
- /* this is illegal */
- *c = -2;
- return initial_pos;
- }
- else {
- hex[0] = *qp_p;
- qp_p++;
- };
- }
- else if (*qp_p == '\n') {
- /* hit soft line break already, continue */
+
+ if (*qp_p == '\n') {
+ /* hit soft line break */
*c = -1;
return qp_p;
- }
- else {
- /* illegal char here */
- *c = -2;
- return initial_pos;
};
- if ( (('0' <= *qp_p) && (*qp_p <= '9')) || (('A' <= *qp_p) && (*qp_p <= 'F')) || (('a' <= *qp_p) && (*qp_p <= 'f')) ) {
- if (hex[0] > 0) {
- hex[1] = *qp_p;
- /* do hex conversion */
- *c = mime_qp_hstr_i(hex);
- qp_p++;
- return qp_p;
- }
- else {
- /* huh ? */
- *c = -2;
- return initial_pos;
- };
- }
- else {
- /* illegal char */
- *c = -2;
- return initial_pos;
- };
+ /* illegal char here */
+ *c = -2;
+ return initial_pos;
}
+
uschar *mime_parse_line(uschar *buffer, uschar *data, uschar *encoding, int *num_decoded) {
if (encoding == NULL) {
/* byte 0 ---------------------- */
if (*(p+1) == 255) {
- mime_set_anomaly(MIME_ANOMALY_BROKEN_BASE64);
break;
}
data[(*num_decoded)] = *p;
p++;
/* byte 1 ---------------------- */
if (*(p+1) == 255) {
- mime_set_anomaly(MIME_ANOMALY_BROKEN_BASE64);
break;
}
data[(*num_decoded)] = *p;
p++;
/* byte 2 ---------------------- */
if (*(p+1) == 255) {
- mime_set_anomaly(MIME_ANOMALY_BROKEN_BASE64);
break;
}
data[(*num_decoded)] = *p;
filename = (uschar *)malloc(2048);
if ((pname != NULL) && (fname != NULL)) {
- snprintf(CS filename, 2048, "%s/%s", pname, fname);
- f = fopen(CS filename,"w+");
+ (void)string_format(filename, 2048, "%s/%s", pname, fname);
+ f = modefopen(filename,"wb+",SPOOL_MODE);
}
else if (pname == NULL) {
- f = fopen(CS fname,"w+");
+ f = modefopen(fname,"wb+",SPOOL_MODE);
}
else if (fname == NULL) {
int file_nr = 0;
/* must find first free sequential filename */
do {
struct stat mystat;
- snprintf(CS filename,2048,"%s/%s-%05u", pname, message_id, file_nr);
+ (void)string_format(filename,2048,"%s/%s-%05u", pname, message_id, file_nr);
file_nr++;
/* security break */
if (file_nr >= 1024)
result = stat(CS filename,&mystat);
}
while(result != -1);
- f = fopen(CS filename,"w+");
+ f = modefopen(filename,"wb+",SPOOL_MODE);
};
/* set expansion variable */
f_pos = ftell(mime_stream);
/* build default decode path (will exist since MBOX must be spooled up) */
- snprintf(CS decode_path,1024,"%s/scan/%s",spool_directory,message_id);
+ (void)string_format(decode_path,1024,"%s/scan/%s",spool_directory,message_id);
/* reserve a line and decoder buffer to work in */
buffer = (uschar *)malloc(MIME_MAX_LINE_LENGTH+1);
}
- fclose(decode_file);
+ (void)fclose(decode_file);
clearerr(mime_stream);
fseek(mime_stream,f_pos,SEEK_SET);
c = fgetc(f);
if (c == EOF) break;
if ( (c == '\t') || (c == ' ') ) continue;
- ungetc(c,f);
+ (void)ungetc(c,f);
};
/* end of the header, terminate with ';' */
c = ';';
};
};
- if (header[num_copied-1] != ';') {
+ if ((num_copied > 0) && (header[num_copied-1] != ';')) {
header[num_copied-1] = ';';
};
}
-int mime_acl_check(FILE *f, struct mime_boundary_context *context, uschar
- **user_msgptr, uschar **log_msgptr) {
+int mime_acl_check(uschar *acl, FILE *f, struct mime_boundary_context *context,
+ uschar **user_msgptr, uschar **log_msgptr) {
int rc = OK;
uschar *header = NULL;
struct mime_boundary_context nested_context;
header = (uschar *)malloc(MIME_MAX_HEADER_SIZE+1);
if (header == NULL) {
log_write(0, LOG_PANIC,
- "acl_smtp_mime: can't allocate %d bytes of memory.", MIME_MAX_HEADER_SIZE+1);
+ "MIME ACL: can't allocate %d bytes of memory.", MIME_MAX_HEADER_SIZE+1);
return DEFER;
};
memset(param_value,0,param_value_len+1);
q = p + mime_parameter_list[j].namelen;
Ustrncpy(param_value, q, param_value_len);
- param_value = rfc2047_decode(param_value, TRUE, NULL, 32, ¶m_value_len, &q);
+ param_value = rfc2047_decode(param_value, check_rfc2047_length, NULL, 32, ¶m_value_len, &q);
debug_printf("Found %s MIME parameter in %s header, value is '%s'\n", mime_parameter_list[j].name, mime_header_list[i].name, param_value);
*((uschar **)(mime_parameter_list[j].value)) = param_value;
p += (mime_parameter_list[j].namelen + param_value_len + 1);
mime_is_coverletter = !(context && context->context == MBC_ATTACHMENT);
/* call ACL handling function */
- rc = acl_check(ACL_WHERE_MIME, NULL, acl_smtp_mime, user_msgptr, log_msgptr);
+ rc = acl_check(ACL_WHERE_MIME, NULL, acl, user_msgptr, log_msgptr);
mime_stream = NULL;
mime_current_boundary = NULL;
else
nested_context.context = MBC_COVERLETTER_ONESHOT;
- rc = mime_acl_check(f, &nested_context, user_msgptr, log_msgptr);
+ rc = mime_acl_check(acl, f, &nested_context, user_msgptr, log_msgptr);
if (rc != OK) break;
}
else if ( (mime_content_type != NULL) &&
/* must find first free sequential filename */
do {
struct stat mystat;
- snprintf(CS filename,2048,"%s/scan/%s/__rfc822_%05u", spool_directory, message_id, file_nr);
+ (void)string_format(filename,2048,"%s/scan/%s/__rfc822_%05u", spool_directory, message_id, file_nr);
file_nr++;
/* security break */
if (file_nr >= 128)