[exim.git] / src / src / demime.h

/*************************************************
*     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
Commit	Line	Data
8523533c TK	1	/*************************************************
	2	* Exim - an Internet mail transport agent *
	3	*************************************************/
	4
	5	/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */
	6	/* License: GPL */
	7
	8	/* demime defines */
	9
	10	#ifdef WITH_OLD_DEMIME
	11
	12	#define MIME_DEMUX_MODE_SCANNING 0
	13	#define MIME_DEMUX_MODE_MIME_HEADERS 1
	14	#define MIME_DEMUX_MODE_BASE64 2
	15	#define MIME_DEMUX_MODE_QP 3
	16	#define MIME_DEMUX_MODE_PLAIN 4
	17
	18	#define MIME_UU_MODE_OFF 0
	19	#define MIME_UU_MODE_UNCONFIRMED 1
	20	#define MIME_UU_MODE_CONFIRMED 2
	21
	22	#define MIME_MAX_EXTENSION 128
	23
	24	#define MIME_READ_LINE_EOF 0
	25	#define MIME_READ_LINE_OK 1
	26	#define MIME_READ_LINE_OVERFLOW 2
	27
	28	#define MIME_SANITY_MAX_LINE_LENGTH 131071
	29	#define MIME_SANITY_MAX_FILENAME 512
	30	#define MIME_SANITY_MAX_HEADER_OPTION_VALUE 1024
	31	#define MIME_SANITY_MAX_B64_LINE_LENGTH 76
	32	#define MIME_SANITY_MAX_BOUNDARY_LENGTH 1024
	33	#define MIME_SANITY_MAX_DUMP_FILES 1024
	34
	35
	36
	37	/* MIME errorlevel settings */
	38
	39	#define MIME_ERRORLEVEL_LONG_LINE 3,US"line length in message or single header size exceeds %u bytes",MIME_SANITY_MAX_LINE_LENGTH
	40	#define MIME_ERRORLEVEL_TOO_MANY_PARTS 3,US"too many MIME parts (max %u)",MIME_SANITY_MAX_DUMP_FILES
	41	#define MIME_ERRORLEVEL_MESSAGE_PARTIAL 3,US"'message/partial' MIME type"
	42	#define MIME_ERRORLEVEL_FILENAME_LENGTH 3,US"proposed filename exceeds %u characters",MIME_SANITY_MAX_FILENAME
	43	#define MIME_ERRORLEVEL_BOUNDARY_LENGTH 3,US"boundary length exceeds %u characters",MIME_SANITY_MAX_BOUNDARY_LENGTH
	44	#define MIME_ERRORLEVEL_DOUBLE_HEADERS 2,US"double headers (content-type, content-disposition or content-transfer-encoding)"
	45	#define MIME_ERRORLEVEL_UU_MISALIGNED 1,US"uuencoded line length is not a multiple of 4 characters"
	46	#define MIME_ERRORLEVEL_UU_LINE_LENGTH 1,US"uuencoded line length does not match advertised number of bytes"
	47	#define MIME_ERRORLEVEL_B64_LINE_LENGTH 1,US"base64 line length exceeds %u characters",MIME_SANITY_MAX_B64_LINE_LENGTH
	48	#define MIME_ERRORLEVEL_B64_ILLEGAL_CHAR 2,US"base64 line contains illegal character"
	49	#define MIME_ERRORLEVEL_B64_MISALIGNED 1,US"base64 line length is not a multiple of 4 characters"
	50	#define MIME_ERRORLEVEL_QP_ILLEGAL_CHAR 1,US"quoted-printable encoding contains illegal character"
	51
	52
	53	/* demime structures */
	54
	55	typedef struct mime_part {
	56	/* true if there was a content-type header */
	57	int seen_content_type;
	58	/* true if there was a content-transfer-encoding header
	59	contains the encoding type */
	60	int seen_content_transfer_encoding;
	61	/* true if there was a content-disposition header */
	62	int seen_content_disposition;
	63	/* pointer to a buffer with the proposed file extension */
	64	uschar *extension;
65	} mime_part;
66
67	typedef struct boundary {
68	struct boundary *next;
69	uschar *boundary_string;
70	} boundary;
71
72	typedef struct file_extension {
73	struct file_extension *next;
74	uschar *file_extension_string;
75	} file_extension;
76
77	/* demime.c prototypes */
78
79	unsigned int mime_hstr_i(uschar *);
80	uschar mime_decode_qp(uschar , int *);
81	int mime_get_dump_file(uschar , FILE , uschar );
82	int mime_header_find(uschar , uschar , uschar **);
83	int mime_read_line(FILE , int, uschar , long *);
84	int mime_check_boundary(uschar , struct boundary );
85	int mime_check_uu_start(uschar , uschar , int *);
86	long uu_decode_line(uschar , uschar , long, uschar );
87	long mime_decode_line(int ,uschar , uschar , long, uschar );
88	void mime_trigger_error(int, uschar *, ...);
89	int mime_demux(FILE , uschar );
90
91
92
93	/* BASE64 decoder matrix */
94	static unsigned char b64[256]={
95	/* 0 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
8e669ac1	96	/* 16 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
8523533c TK	97	/* 32 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 62, 128, 128, 128, 63,
	98	/* 48 */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 128, 128, 128, 255, 128, 128,
	99	/* 64 */ 128, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
	100	/* 80 */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 128, 128, 128, 128, 128,
	101	/* 96 */ 128, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
	102	41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 128, 128, 128, 128, 128,
	103	128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
	104	128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
	105	128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
	106	128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
	107	128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
	108	128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
	109	128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
8e669ac1	110	128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128
8523533c TK	111	};
	112
	113
	114	/* Microsoft-Style uudecode matrix */
	115	static unsigned char uudec[256]={
8e669ac1	116	/* 0 */ 0, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
8523533c TK	117	/* 16 */ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
	118	/* 32 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
	119	/* 48 */ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
	120	/* 64 */ 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
	121	/* 80 */ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
	122	/* 96 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
	123	/* 112 */ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
	124	/* 128 */ 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
	125	/* 144 */ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
	126	/* 160 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
	127	/* 176 */ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
	128	/* 192 */ 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
	129	/* 208 */ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
	130	/* 224 */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
8e669ac1	131	/* 240 */ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
8523533c TK	132	};
	133
	134	#endif