From b93de2c559622858ae31f686055549a4478825ce Mon Sep 17 00:00:00 2001 From: nico Date: Wed, 23 Nov 2011 23:24:59 +0000 Subject: [PATCH] [backfire] package/busybox: add patch missing from r29315 (oops) git-svn-id: svn://svn.openwrt.org/openwrt/branches/backfire@29322 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- ...004-upstream-percent_decode_in_place.patch | 216 ++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 package/busybox/patches/004-upstream-percent_decode_in_place.patch diff --git a/package/busybox/patches/004-upstream-percent_decode_in_place.patch b/package/busybox/patches/004-upstream-percent_decode_in_place.patch new file mode 100644 index 000000000..521037d1f --- /dev/null +++ b/package/busybox/patches/004-upstream-percent_decode_in_place.patch @@ -0,0 +1,216 @@ +--- a/include/libbb.h ++++ b/include/libbb.h +@@ -1368,6 +1368,15 @@ pid_t *find_pid_by_name(const char* proc + pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC; + + ++/* Use strict=1 if you process input from untrusted source: ++ * it will return NULL on invalid %xx (bad hex chars) ++ * and str + 1 if decoded char is / or NUL. ++ * In non-strict mode, it always succeeds (returns str), ++ * and also it additionally decoded '+' to space. ++ */ ++char *percent_decode_in_place(char *str, int strict) FAST_FUNC; ++ ++ + extern const char bb_uuenc_tbl_base64[]; + extern const char bb_uuenc_tbl_std[]; + void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC; +--- a/libbb/Kbuild ++++ b/libbb/Kbuild +@@ -66,6 +66,7 @@ lib-y += mtab_file.o + lib-y += obscure.o + lib-y += parse_mode.o + lib-y += parse_config.o ++lib-y += percent_decode.o + lib-y += perror_msg.o + lib-y += perror_msg_and_die.o + lib-y += perror_nomsg.o +--- /dev/null ++++ b/libbb/percent_decode.c +@@ -0,0 +1,69 @@ ++/* vi: set sw=4 ts=4: */ ++/* ++ * Licensed under GPLv2 or later, see file LICENSE in this source tree. ++ */ ++ ++//kbuild:lib-y += percent_decode.o ++ ++#include "libbb.h" ++ ++static unsigned hex_to_bin(unsigned char c) ++{ ++ unsigned v; ++ ++ v = c - '0'; ++ if (v <= 9) ++ return v; ++ /* c | 0x20: letters to lower case, non-letters ++ * to (potentially different) non-letters */ ++ v = (unsigned)(c | 0x20) - 'a'; ++ if (v <= 5) ++ return v + 10; ++ return ~0; ++/* For testing: ++void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); } ++int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f'); ++t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; } ++*/ ++} ++ ++char* FAST_FUNC percent_decode_in_place(char *str, int strict) ++{ ++ /* note that decoded string is always shorter than original */ ++ char *src = str; ++ char *dst = str; ++ char c; ++ ++ while ((c = *src++) != '\0') { ++ unsigned v; ++ ++ if (!strict && c == '+') { ++ *dst++ = ' '; ++ continue; ++ } ++ if (c != '%') { ++ *dst++ = c; ++ continue; ++ } ++ v = hex_to_bin(src[0]); ++ if (v > 15) { ++ bad_hex: ++ if (strict) ++ return NULL; ++ *dst++ = '%'; ++ continue; ++ } ++ v = (v * 16) | hex_to_bin(src[1]); ++ if (v > 255) ++ goto bad_hex; ++ if (strict && (v == '/' || v == '\0')) { ++ /* caller takes it as indication of invalid ++ * (dangerous wrt exploits) chars */ ++ return str + 1; ++ } ++ *dst++ = v; ++ src += 2; ++ } ++ *dst = '\0'; ++ return str; ++} +--- a/networking/httpd.c ++++ b/networking/httpd.c +@@ -785,78 +785,6 @@ static char *encodeString(const char *st + } + #endif /* FEATURE_HTTPD_ENCODE_URL_STR */ + +-/* +- * Given a URL encoded string, convert it to plain ascii. +- * Since decoding always makes strings smaller, the decode is done in-place. +- * Thus, callers should xstrdup() the argument if they do not want the +- * argument modified. The return is the original pointer, allowing this +- * function to be easily used as arguments to other functions. +- * +- * string The first string to decode. +- * option_d 1 if called for httpd -d +- * +- * Returns a pointer to the decoded string (same as input). +- */ +-static unsigned hex_to_bin(unsigned char c) +-{ +- unsigned v; +- +- v = c - '0'; +- if (v <= 9) +- return v; +- /* c | 0x20: letters to lower case, non-letters +- * to (potentially different) non-letters */ +- v = (unsigned)(c | 0x20) - 'a'; +- if (v <= 5) +- return v + 10; +- return ~0; +-} +-/* For testing: +-void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); } +-int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f'); +-t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; } +-*/ +-static char *decodeString(char *orig, int option_d) +-{ +- /* note that decoded string is always shorter than original */ +- char *string = orig; +- char *ptr = string; +- char c; +- +- while ((c = *ptr++) != '\0') { +- unsigned v; +- +- if (option_d && c == '+') { +- *string++ = ' '; +- continue; +- } +- if (c != '%') { +- *string++ = c; +- continue; +- } +- v = hex_to_bin(ptr[0]); +- if (v > 15) { +- bad_hex: +- if (!option_d) +- return NULL; +- *string++ = '%'; +- continue; +- } +- v = (v * 16) | hex_to_bin(ptr[1]); +- if (v > 255) +- goto bad_hex; +- if (!option_d && (v == '/' || v == '\0')) { +- /* caller takes it as indication of invalid +- * (dangerous wrt exploits) chars */ +- return orig + 1; +- } +- *string++ = v; +- ptr += 2; +- } +- *string = '\0'; +- return orig; +-} +- + #if ENABLE_FEATURE_HTTPD_BASIC_AUTH + /* + * Decode a base64 data stream as per rfc1521. +@@ -1876,7 +1804,7 @@ static void handle_incoming_and_exit(con + } + + /* Decode URL escape sequences */ +- tptr = decodeString(urlcopy, 0); ++ tptr = percent_decode_in_place(urlcopy, /*strict:*/ 1); + if (tptr == NULL) + send_headers_and_exit(HTTP_BAD_REQUEST); + if (tptr == urlcopy + 1) { +@@ -2319,7 +2247,7 @@ int httpd_main(int argc UNUSED_PARAM, ch + , &verbose + ); + if (opt & OPT_DECODE_URL) { +- fputs(decodeString(url_for_decode, 1), stdout); ++ fputs(percent_decode_in_place(url_for_decode, /*strict:*/ 0), stdout); + return 0; + } + #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR +--- a/networking/wget.c ++++ b/networking/wget.c +@@ -373,8 +373,13 @@ static void parse_url(char *src_url, str + sp = strrchr(h->host, '@'); + h->user = NULL; + if (sp != NULL) { +- h->user = h->host; ++ // URL-decode "user:password" string before base64-encoding: ++ // wget http://test:my%20pass@example.com should send ++ // Authorization: Basic dGVzdDpteSBwYXNz ++ // which decodes to "test:my pass". ++ // Standard wget and curl do this too. + *sp = '\0'; ++ h->user = percent_decode_in_place(h->host, /*strict:*/ 0); + h->host = sp + 1; + } + -- 2.35.1