/* $Cambridge: exim/exim-src/src/demime.h,v 1.3 2005/02/17 11:58:26 ph10 Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */
/* License: GPL */
/* demime defines */
#ifdef WITH_OLD_DEMIME
#define MIME_DEMUX_MODE_SCANNING 0
#define MIME_DEMUX_MODE_MIME_HEADERS 1
#define MIME_DEMUX_MODE_BASE64 2
#define MIME_DEMUX_MODE_QP 3
#define MIME_DEMUX_MODE_PLAIN 4
#define MIME_UU_MODE_OFF 0
#define MIME_UU_MODE_UNCONFIRMED 1
#define MIME_UU_MODE_CONFIRMED 2
#define MIME_MAX_EXTENSION 128
#define MIME_READ_LINE_EOF 0
#define MIME_READ_LINE_OK 1
#define MIME_READ_LINE_OVERFLOW 2
#define MIME_SANITY_MAX_LINE_LENGTH 131071
#define MIME_SANITY_MAX_FILENAME 512
#define MIME_SANITY_MAX_HEADER_OPTION_VALUE 1024
#define MIME_SANITY_MAX_B64_LINE_LENGTH 76
#define MIME_SANITY_MAX_BOUNDARY_LENGTH 1024
#define MIME_SANITY_MAX_DUMP_FILES 1024
/* MIME errorlevel settings */
#define MIME_ERRORLEVEL_LONG_LINE 3,US"line length in message or single header size exceeds %u bytes",MIME_SANITY_MAX_LINE_LENGTH
#define MIME_ERRORLEVEL_TOO_MANY_PARTS 3,US"too many MIME parts (max %u)",MIME_SANITY_MAX_DUMP_FILES
#define MIME_ERRORLEVEL_MESSAGE_PARTIAL 3,US"'message/partial' MIME type"
#define MIME_ERRORLEVEL_FILENAME_LENGTH 3,US"proposed filename exceeds %u characters",MIME_SANITY_MAX_FILENAME
#define MIME_ERRORLEVEL_BOUNDARY_LENGTH 3,US"boundary length exceeds %u characters",MIME_SANITY_MAX_BOUNDARY_LENGTH
#define MIME_ERRORLEVEL_DOUBLE_HEADERS 2,US"double headers (content-type, content-disposition or content-transfer-encoding)"
#define MIME_ERRORLEVEL_UU_MISALIGNED 1,US"uuencoded line length is not a multiple of 4 characters"
#define MIME_ERRORLEVEL_UU_LINE_LENGTH 1,US"uuencoded line length does not match advertised number of bytes"
#define MIME_ERRORLEVEL_B64_LINE_LENGTH 1,US"base64 line length exceeds %u characters",MIME_SANITY_MAX_B64_LINE_LENGTH
#define MIME_ERRORLEVEL_B64_ILLEGAL_CHAR 2,US"base64 line contains illegal character"
#define MIME_ERRORLEVEL_B64_MISALIGNED 1,US"base64 line length is not a multiple of 4 characters"
#define MIME_ERRORLEVEL_QP_ILLEGAL_CHAR 1,US"quoted-printable encoding contains illegal character"
/* demime structures */
typedef struct mime_part {
/* true if there was a content-type header */
int seen_content_type;
/* true if there was a content-transfer-encoding header
contains the encoding type */
int seen_content_transfer_encoding;
/* true if there was a content-disposition header */
int seen_content_disposition;
/* pointer to a buffer with the proposed file extension */
uschar *extension;
} mime_part;
typedef struct boundary {
struct boundary *next;
uschar *boundary_string;
} boundary;
typedef struct file_extension {
struct file_extension *next;
uschar *file_extension_string;
} file_extension;
/* demime.c prototypes */
unsigned int mime_hstr_i(uschar *);
uschar *mime_decode_qp(uschar *, int *);
int mime_get_dump_file(uschar *, FILE **, uschar *);
int mime_header_find(uschar *, uschar *, uschar **);
int mime_read_line(FILE *, int, uschar *, long *);
int mime_check_boundary(uschar *, struct boundary *);
int mime_check_uu_start(uschar *, uschar *, int *);
long uu_decode_line(uschar *, uschar **, long, uschar *);
long mime_decode_line(int ,uschar *, uschar **, long, uschar *);
void mime_trigger_error(int, uschar *, ...);
int mime_demux(FILE *, uschar *);
/* BASE64 decoder matrix */
static unsigned char b64[256]={
/* 0 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
/* 16 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
/* 32 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 62, 128, 128, 128, 63,
/* 48 */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 128, 128, 128, 255, 128, 128,
/* 64 */ 128, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
/* 80 */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 128, 128, 128, 128, 128,
/* 96 */ 128, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128
};
/* Microsoft-Style uudecode matrix */
static unsigned char uudec[256]={
/* 0 */ 0, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
/* 16 */ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
/* 32 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
/* 48 */ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
/* 64 */ 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
/* 80 */ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
/* 96 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
/* 112 */ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
/* 128 */ 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
/* 144 */ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
/* 160 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
/* 176 */ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
/* 192 */ 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
/* 208 */ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
/* 224 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
/* 240 */ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
};
#endif
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