/* ISC license. */ #include #include #include #include #include #include #include /* Decodes an URI. Accepts absolute (http and https) and local, decodes %-encoding up to ? query. st\ev 0 1 2 3 4 5 6 7 8 9 a b c d e \0 invalid % ? / : @ h t p s 0-9 a-f other delim 00 Pp START X X X X PATH? X X H X X X X X X X 01 H X X X X X X X X HT X X X X X X 02 HT X X X X X X X X HTT X X X X X X 03 HTT X X X X X X X X X HTTP X X X X X 04 HTTP X X X X X AUTH X X X X HTTPS X X X X 05 s HTTPS X X X X X AUTH X X X X X X X X X 06 AUTH X X X X AUTH/ X X X X X X X X X X 07 AUTH/ X X X X HOST X X X X X X X X X X 08 H Hp Hp Hp Hp Hp Hp Hp Hp HOST X X HQ H1 X X X H1 H1 H1 H1 H1 H1 H1 X 09 p a a HQ X X H1 X X X X X X X X HQ1 HQ1 X X 0a ab ab HQ1 X X X X X X X X X X X H1 H1 X X 0b p zPp zm p p p p p p p H1 END X HQ H1 PATH PORT X H1 H1 H1 H1 H1 H1 H1 X 0c Pp p PORT X X X X PATH X X X X X X PORT1 X X X 0d zc zcPp p PORT1 END X X X PATH X X X X X X PORT1 X X X 0e p zQ p p p p p p p p p p PATH END X Q QUERY PATH PATH PATH PATH PATH PATH PATH PATH PATH PATH X 0f p a a Q X X PATH X X X X X X X X Q1 Q1 X X 10 ab ab Q1 X X X X X X X X X X X PATH PATH X X 11 p p p p p p p p p p p p p p QUERY END X QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY 12 p zQ p p p p p p p p p PATH? END X Q QUERY X PATH PATH PATH PATH PATH PATH PATH PATH PATH X st\ev 0 1 2 3 4 5 6 7 8 9 a b c d e \0 invalid % ? / : @ h t p s 0-9 a-f other delim END = 13, X = 14 0x8000 s ssl 0x4000 H start host 0x2000 z print \0 0x1000 m mark 0x0800 c scan port from mark, reset to mark 0x0400 P start path 0x0200 p print cur 0x0100 Q start query 0x0080 a push num 0x0040 b decode num, print num, reinit */ static inline uint8_t uridecode_cclass (char c) { static uint8_t const table[128] = "01111111111111111111111111111111161162>>>>>=>==4;;;;;;;;;;5>>=>36<<<<<<====================>1>==1<<<<<<=7=======9==:8======111=1" ; return c & 0x80 ? 1 : table[(uint8_t)c] - '0' ; } size_t tipidee_uri_parse (char *out, size_t max, char const *in, tipidee_uri *uri) { static uint16_t const table[19][15] = { { 0x0014, 0x0014, 0x0014, 0x0014, 0x0612, 0x0014, 0x0014, 0x0001, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0002, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0003, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0004, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0006, 0x0014, 0x0014, 0x0014, 0x0014, 0x0005, 0x0014, 0x0014, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x8006, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0007, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0008, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x4009, 0x420b, 0x0014, 0x0014, 0x0014, 0x420b, 0x420b, 0x420b, 0x420b, 0x420b, 0x420b, 0x420b, 0x0014 }, { 0x0014, 0x0014, 0x020b, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x008a, 0x008a, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x00cb, 0x00cb, 0x0014, 0x0014 }, { 0x0213, 0x0014, 0x0009, 0x000b, 0x260e, 0x300c, 0x0014, 0x020b, 0x020b, 0x020b, 0x020b, 0x020b, 0x020b, 0x020b, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x060e, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x020d, 0x0014, 0x0014, 0x0014 }, { 0x2813, 0x0014, 0x0014, 0x0014, 0x2e0e, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x020d, 0x0014, 0x0014, 0x0014 }, { 0x0213, 0x0014, 0x000f, 0x2111, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x0014 }, { 0x0014, 0x0014, 0x020e, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0090, 0x0090, 0x0014, 0x0014 }, { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x00ce, 0x00ce, 0x0014, 0x0014 }, { 0x0213, 0x0014, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211 }, { 0x0213, 0x0014, 0x000f, 0x2111, 0x0014, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x0014 } } ; size_t w = 0, lastslash = 0, mark = 0 ; char const *host = 0 ; char const *path = 0 ; char const *query = 0 ; uint16_t port = 0 ; uint16_t state = 0 ; unsigned char decoded = 0 ; uint8_t ssl = 0 ; for (; state < 0x13 ; in++) { uint16_t c = table[state][uridecode_cclass(*in)] ; /* LOLDEBUG("tipidee_uri_parse: state %hu, event %c, newstate %hu, actions %s%s%s%s%s%s%s%s%s%s", state, *in, c & 0x1f, c & 0x8000 ? "s" : "", c & 0x4000 ? "H" : "", c & 0x2000 ? "z" : "", c & 0x1000 ? "m" : "", c & 0x0800 ? "c" : "", c & 0x0400 ? "P" : "", c & 0x0200 ? "p" : "", c & 0x0100 ? "Q" : "", c & 0x0080 ? "a" : "", c & 0x0040 ? "b" : "" ) ; */ state = c & 0x1f ; if (c & 0x8000) ssl = 1 ; if (c & 0x4000) host = out + w ; if (c & 0x2000) { if (w >= max) return 0 ; out[w++] = 0 ; } if (c & 0x1000) mark = w ; if (c & 0x0800) { if (!uint160_scan(out + mark, &port) || !port) return 0 ; w = mark ; } if (c & 0x0400) path = out + w ; if (c & 0x0200) { if (w >= max) return 0 ; out[w++] = *in ; } if (c & 0x0100) query = out + w ; if (c & 0x0080) decoded = (decoded << 4) | fmtscan_num(*in, 16) ; if (c & 0x0040) { if (w >= max) return 0 ; if (decoded == '/') lastslash = w ; out[w++] = decoded ; decoded = 0 ; } } if (state > 0x13) return 0 ; if (path) { size_t len = strlen(path) ; if (len >= 3 && !memcmp(path + len - 3, "/..", 3)) return 0 ; if (strstr(path, "/../")) return 0 ; } uri->host = host ; uri->port = port ; uri->path = path ? path : "/" ; uri->query = query ; uri->lastslash = path ? lastslash - (path - out) : 0 ; uri->https = ssl ; return w ; }