1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2004 */
8 #ifdef WITH_CONTENT_SCAN
10 #define MIME_MAX_HEADER_SIZE 8192
11 #define MIME_MAX_LINE_LENGTH 32768
13 #define MBC_ATTACHMENT 0
14 #define MBC_COVERLETTER_ONESHOT 1
15 #define MBC_COVERLETTER_ALL 2
17 struct mime_boundary_context
19 struct mime_boundary_context
*parent
;
20 unsigned char *boundary
;
24 typedef struct mime_header
{
30 static mime_header mime_header_list
[] = {
31 { US
"content-type:", 13, &mime_content_type
},
32 { US
"content-disposition:", 20, &mime_content_disposition
},
33 { US
"content-transfer-encoding:", 26, &mime_content_transfer_encoding
},
34 { US
"content-id:", 11, &mime_content_id
},
35 { US
"content-description:", 20, &mime_content_description
}
38 static int mime_header_list_size
= sizeof(mime_header_list
)/sizeof(mime_header
);
42 typedef struct mime_parameter
{
48 static mime_parameter mime_parameter_list
[] = {
49 { US
"name=", 5, &mime_filename
},
50 { US
"filename=", 9, &mime_filename
},
51 { US
"charset=", 8, &mime_charset
},
52 { US
"boundary=", 9, &mime_boundary
}
56 /* MIME Anomaly list */
57 #define MIME_ANOMALY_BROKEN_BASE64 2, "Broken BASE64 encoding detected"
58 #define MIME_ANOMALY_BROKEN_QP 1, "Broken Quoted-Printable encoding detected"
61 /* BASE64 decoder matrix */
62 static unsigned char mime_b64
[256]={
63 /* 0 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
64 /* 16 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
65 /* 32 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 62, 128, 128, 128, 63,
66 /* 48 */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 128, 128, 128, 255, 128, 128,
67 /* 64 */ 128, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
68 /* 80 */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 128, 128, 128, 128, 128,
69 /* 96 */ 128, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
70 /* 112 */ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 128, 128, 128, 128, 128,
71 /* 128 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
72 /* 144 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
73 /* 160 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
74 /* 176 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
75 /* 192 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
76 /* 208 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
77 /* 224 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
78 /* 240 */ 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128