Add new fuzzer for the .netrc parser

* fuzz/wget_netrc_fuzzer.c: New fuzzer
* fuzz/wget_netrc_fuzzer.dict: Fuzzer dictionary
* fuzz/wget_netrc_fuzzer.in: Initial corpora
* src/ftp.c (getftp): Amend call to search_netrc()
* src/http.c (initialize_request): Likewise
* src/netrc.c: Cleanup, prepare code for fuzzing
* src/netrc.h: Cleanup

fuzz/Makefile.am

@@ -13,6 +13,7 @@ WGET_TESTS = \
  wget_cookie_fuzzer$(EXEEXT) \
  wget_ftpls_fuzzer$(EXEEXT) \
  wget_html_fuzzer$(EXEEXT) \
+ wget_netrc_fuzzer$(EXEEXT) \
  wget_options_fuzzer$(EXEEXT) \
  wget_robots_fuzzer$(EXEEXT) \
  wget_url_fuzzer$(EXEEXT)
@@ -47,6 +48,9 @@ wget_ftpls_fuzzer_LDADD = ../src/libunittest.a $(LDADD)
 wget_html_fuzzer_SOURCES = wget_html_fuzzer.c $(MAIN)
 wget_html_fuzzer_LDADD = ../src/libunittest.a $(LDADD)
 
+wget_netrc_fuzzer_SOURCES = wget_netrc_fuzzer.c $(MAIN)
+wget_netrc_fuzzer_LDADD = ../src/libunittest.a $(LDADD)
+
 wget_options_fuzzer_SOURCES = wget_options_fuzzer.c $(MAIN)
 wget_options_fuzzer_LDADD = ../src/libunittest.a $(LDADD)
 

fuzz/wget_netrc_fuzzer.c

@@ -0,0 +1,100 @@
+/*
+ * Copyright(c) 2017-2018 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Wget.
+ *
+ * GNU Wget is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GNU Wget is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Wget.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <stdint.h> // uint8_t
+#include <stdio.h>  // fmemopen
+#include <string.h>  // strncmp
+#include <stdlib.h>  // free
+#include <setjmp.h> // longjmp, setjmp
+
+#include "wget.h"
+#undef fopen_wgetrc
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+  #include "netrc.h"
+
+  // declarations for wget internal functions
+  int main_wget(int argc, const char **argv);
+  void cleanup(void);
+  FILE *fopen_wget(const char *pathname, const char *mode);
+  FILE *fopen_wgetrc(const char *pathname, const char *mode);
+  void exit_wget(int status);
+#ifdef __cplusplus
+  }
+#endif
+
+#include "fuzzer.h"
+
+FILE *fopen_wget(const char *pathname, const char *mode)
+{
+	return fopen("/dev/null", mode);
+}
+
+FILE *fopen_wgetrc(const char *pathname, const char *mode)
+{
+	return NULL;
+}
+
+#ifdef FUZZING
+void exit_wget(int status)
+{
+}
+#else
+void exit(int status)
+{
+}
+#endif
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+	FILE *fp, *bak;
+	struct fileinfo *fi;
+        const char *user = NULL, *pw = NULL;
+
+	if (size > 4096) // same as max_len = ... in .options file
+		return 0;
+
+	bak = stderr;
+	stderr = fopen("/dev/null", "w");
+
+	fp = fmemopen((void *) data, size, "r");
+	if (!fp) return 0;
+
+	opt.netrc = 1;
+
+	user = NULL; // get first entry
+	search_netrc("x", &user, &pw, 1, fp);
+	netrc_cleanup();
+
+	user = "u"; // get entry for user 'u'
+	search_netrc("x", &user, &pw, 1, fp);
+	netrc_cleanup();
+
+	fclose(fp);
+
+	fclose(stderr);
+	stderr = bak;
+
+	return 0;
+}

fuzz/wget_netrc_fuzzer.dict

@@ -0,0 +1,8 @@
+"machine"
+"default"
+"login"
+"password"
+"macdef"
+"account"
+"port"
+"force"

fuzz/wget_netrc_fuzzer.in/01e0b3f07cee336c8b1b02dfed8993db4d25b9c1

@@ -0,0 +1,4 @@
+default force G
+force G
+fo G
+force G

fuzz/wget_netrc_fuzzer.in/020dc624546e1d41d15b641f7dac08f847b529ac

@@ -0,0 +1,3 @@
+machine
+force ye
+force yeforce ye

fuzz/wget_netrc_fuzzer.in/034a03fa94dbb20374fe19eb577056ddd7a1fc8c

@@ -0,0 +1,8 @@
+
+dehinen
+login
+login
+login
+login
+login
+login

fuzz/wget_netrc_fuzzer.in/038e462cb441a42975669226cccc24244968de2b

@@ -0,0 +1 @@
+"oGÿ"eorne

fuzz/wget_netrc_fuzzer.in/0503fdd417b583a810fa77145f2661333be70232

@@ -0,0 +1,3 @@
+"defÿÿÿJò
+!e)G
+a

fuzz/wget_netrc_fuzzer.in/056a54b1e5337ff869e545a681b38a738cde07fb

@@ -0,0 +1,13 @@
+machine
+force Ye force Ye
+force Ye
+force Ye
+force Ye
+force Ye force Ye force Ye
+force Ye
+force Ye
+force Ye
+force Ye
+force Ye
+force Ye
+force Ye force Ye

fuzz/wget_netrc_fuzzer.in/06169023e938f822ca695366e8650aed2b76d3c5

@@ -0,0 +1,40 @@
+default
+!
+login
+
+login
+login
+login
+
+login
+login
+login
+
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+

fuzz/wget_netrc_fuzzer.in/062865f21eb260fa87882a16a711d497ba4d3eff

@@ -0,0 +1,61 @@
+e
+a 
+c 
+n 
+c
+a 
+ca 
+c 
+c
+n
+c
+a 
+c
+n
+a 
+c 
+û 
+n 
+ce
+a 
+c 
+n 
+c
+a 
+ca 
+c 
+c
+n
+c
+a 
+c
+n
+a 
+c 
+û 
+n 
+c
+a 
+a 
+c 
+û 
+n 
+c
+a 
+c
+n
+a 
+c 
+a 
+a 
+c 
+û 
+n 
+c
+a 
+c
+n
+a 
+c 
+û 
+n 

fuzz/wget_netrc_fuzzer.in/0a150a8c34743ccc77af8ee9dffbd85e688db8a3

@@ -0,0 +1,2 @@
+def\\\\\\\\\\\\\ÿ
+port

fuzz/wget_netrc_fuzzer.in/0a8489e8f5eeebeba2e5880f5b649687938a479c

@@ -0,0 +1,17 @@
+machine
+
+efault
+login
+machn
+machine :ogn 
+login
+mwopax
+machine a.b
+login b
+pass÷ord x
+machine a.baogiÿe
+lt
+
+login b
+lologin cßz
+

fuzz/wget_netrc_fuzzer.in/0f4995a85a7f1369c7ca0a9ebbe72e5d9477fdf2

@@ -0,0 +1,9 @@
+#e x.y login y¯password x
+#þÿÿÿÿÿÿÿ
+machine xûn y password x
+#
+machine x.e x.y login y passwor#
+machine x.e x.y login y¯password x
+#þÿÿÿÿÿÿÿ
+machine xûû
+logyn bûûûûû

fuzz/wget_netrc_fuzzer.in/10b2ff2b5b2a406533d685714737868f17a7b3c7

@@ -0,0 +1,7 @@
+#
+machine x.y login y password x
+#
+mx
+#
+machine (.y login y password x
+machine a.bmaûûûûûn"bûûûûû

fuzz/wget_netrc_fuzzer.in/11585930ca60c5fea9ea1abf7b74388747fc9513

@@ -0,0 +1,2 @@
+default	force T
+force

fuzz/wget_netrc_fuzzer.in/11678fc7a58f63228a0704bce07ca19dddcfa7db

@@ -0,0 +1,17 @@
+<EFBFBD> 
+mc 
+c 
+<EFBFBD> 
+r
+mc 
+c 
+<EFBFBD> 
+r
+c 
+c 
+c 
+c 
+<EFBFBD>
+m 
+c 
+c 

fuzz/wget_netrc_fuzzer.in/137e70fbba9515b6cf05f91e70dbc191055f7b42

@@ -0,0 +1,5 @@
+#
+maûûûûûûûûûûûûûûûûûûûûûûûûûûû
+  c1 a
+  c2 z
+

fuzz/wget_netrc_fuzzer.in/1827c8f5b287337a52ebfa82806d618226557dd9

@@ -0,0 +1,5 @@
+#
+machine def login y passw
+  c1 a
+  c2 z
+

fuzz/wget_netrc_fuzzer.in/1a2c94ae37cf51c58d1d333304b0f6b2d3ce150b

@@ -0,0 +1,16 @@
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine
+machine

fuzz/wget_netrc_fuzzer.in/1a756068665a5c39da44e6dd4f51109d99e4ec47

@@ -0,0 +1,8 @@
+machine
+machine ‹m machine »
+machine !
+machine f
+machine *
machine xo default machine u
+machine x
+machine y
+machine û

fuzz/wget_netrc_fuzzer.in/1b3dd21d9722a453459309329a68e3931dfd274b

@@ -0,0 +1,73 @@
+defaupasslogint	force T
+forcey
+m!chine 
+password 
+password
+password
+passworsword 
+password
+password
+password
+password
+password
+pa(sword
+password
+password 
+password
+password
+password
+password
+password
+password
+password 
+paspassword 
+password
+password
+password
+password
+password
+pa
+password 
+password
+passwod
+password
+password
+pa(sword
+password
+password 
+password
+password
+password
+password
+password
+password
+password 
+pcspmachineassword 
+password
+p(sword
+password
+password 
+password
+passwod
+password
+password
+pa(sword
+password
+password 
+password
+password
+password
+password
+password
+password
+password 
+pcspmachineassword 
+password
+password
+password
+password
+password
+pa(sword
+passwd
+password 
+password

fuzz/wget_netrc_fuzzer.in/1b4cc4640cab20d60a9785ab14e7edb052b3c204

@@ -0,0 +1,24 @@
+#login
+machine x.y login y password x
+máchine a.b
+locdef m
+  c1 a
+  c2 b
+
+micdef mm
+  c1 a
+  c2 z
+#
+m
+achine x.y login y password x
+machine a.b
+logyn b
+password a
+macdef m
+  c1 a
+  c2 b
+
+logynmacdef mm
+  c1 a
+  c2 z
+

fuzz/wget_netrc_fuzzer.in/206f28a7889523ba66e811f81d8a96844d46478b

@@ -0,0 +1,21 @@
+#mx
+
+##
+#
+"
+"
+##
+"
+#
+#
+#
+#
+#
+#
+#
+Η#
+#
+<EFBFBD>
+#
+#
+Ϋ

fuzz/wget_netrc_fuzzer.in/210ff31677b69e6aedc00e3d688b12500f6738f5

@@ -0,0 +1,256 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
+
+

fuzz/wget_netrc_fuzzer.in/21d6ede3a3556a59535293cee6ab9f0c32252681

@@ -0,0 +1,34 @@
+machine
+macdef
+)
+)
+)
+f
+)
+)
+)
+)
+)
+m
+)
+m
+
+2
+)
+)
+)
+m
+)
+m
+
+2
+)
+)
+)
+)
+)
+)
+)
+a
+)
+a

fuzz/wget_netrc_fuzzer.in/255a85f567f4f729ca20af038fec515f36652067

@@ -0,0 +1,4 @@
+#
+machine x.ymacdef login y password x
+maűssword x
+maűűűűűűűűűűűűűűűűűűűűűűűűű'űűűűűűűűűűűűűűűűchine x.y w

fuzz/wget_netrc_fuzzer.in/25aa07271809a4940aae9d4d5186924c567e3aec

@@ -0,0 +1,4 @@
+#
+maűűŞ																																	űűűűűűűűűa
+äßśÍ z'
+

fuzz/wget_netrc_fuzzer.in/2671a11bfcc3a8731ece36f4b537cd7a934cbf4e

@@ -0,0 +1,14 @@
+#
+machine x.ogin b
+password a
+macdef m
+  c1 a
+  c2 b
+
+macdef mm
+  cword a
+macdef m
+  c1 a
+  c21 a
+  c2 z
+

fuzz/wget_netrc_fuzzer.in/293b83eb72ef865df5078873013aab2f85d2f986

@@ -0,0 +1,8 @@
+d
ault port
+port
+port
+port
+port
+porj
+port
+port

fuzz/wget_netrc_fuzzer.in/2b69d9f94345c1b3fea6a6d4e441dd611ed42154

@@ -0,0 +1,3 @@
+default
+force ye force ye
+force Ye force Ye

fuzz/wget_netrc_fuzzer.in/2bb9d67012f1997d6bb0a355653814829782571d

@@ -0,0 +1,48 @@
+machine
+
+login
+macn
+default
+login
+ºlogin
+machine
+default
+login
+º
+machine
+lo
+login
+machine
+login
+machine
+login
+defagin
+default
+login
+ºlogin
+machine
+login
+machine
+login
+default
+login
+º
+machine
+loGin
+machine
+logdefaultine
+login
+default
+lo'gin
+machine
+login
+machine
+login
+machine
+login
+defaultGin
+machine
+logdefauac!hine
+login
+default
+login

fuzz/wget_netrc_fuzzer.in/2c2aa2ede090fa96a2af4619031742e989ba3a2f

@@ -0,0 +1,3 @@
+#
+machine x.y login ûûûûûûßûûûûûûûûûûe x.y login y password x1    c2 z
+

fuzz/wget_netrc_fuzzer.in/2d318568e351dde92632724979bceaeb34967ab7

@@ -0,0 +1,4 @@
+";orceorõpaR wor\rä
+!
+
+a

fuzz/wget_netrc_fuzzer.in/2dc24a083764ab472324ce1d0972a7228e6953db

@@ -0,0 +1 @@
+mdeforce ye

fuzz/wget_netrc_fuzzer.in/2e8a2e3b019b11de5858659075e8977951d0d726

@@ -0,0 +1,13 @@
+#logyn
+machine x.y login y padefaultx
+machine a.b
+login b
+pass÷ord x
+machine a.b
+loginy login y padefaultx
+machine a.b
+login b
+pass÷ord x
+machine a.g
+login  c2 z
+

fuzz/wget_netrc_fuzzer.in/31330fadeace977df243f9f7ddc0e0bf0f375f41

@@ -0,0 +1,4 @@
+de¾ault force G
+force G
+fo G
+force G

fuzz/wget_netrc_fuzzer.in/31a8b38dd6342b78ca946c57fc8161a4939eb82b

@@ -0,0 +1,35 @@
+y
+m!chine 
+passwor 
+password
+password
+password
+password
+password
+pa(sword
+password
+password 
+password
+password
+password
+password
+password
+password
+password 
+paspasswnrd 
+password
+password
+password
+password
+password
+pa(sword
+password
+password 
+password
+password
+password
+password
+password
+password
+password 
+ðassword

fuzz/wget_netrc_fuzzer.in/33eec97de368e60f78831403e99bd4f6836967b4

@@ -0,0 +1,15 @@
+machine x|i
+machine ű#
+machine x.y
+machine X.y
+machine 8.y machine x.)cy
+machine x.yd machine śž
+machine m machine yx.
+machine !e
+machine *e xo
+machine ult
+machine ‹mat machine yxt
+cnebt
+machine }
+machine x.o default machine xe
+machine xf—

fuzz/wget_netrc_fuzzer.in/346ce1c5914282a3564141663876ad312ca0dafe

@@ -0,0 +1,14 @@
+machine l#
+machine _ machine zy machine ;
+machine a.b machine aV
+machine a
+machine _6 machine x) machine xy machine 

+machine _0
+machine 
+machine 1 machine x machine €
+machine d
+machine n
+machine 0 machine y machine
+machine pg
+machine Y
+machine 

fuzz/wget_netrc_fuzzer.in/35dc0e6f80e9724e06cd6888a1edc56b845c4d2d

@@ -0,0 +1,10 @@
+machine ‹ machine y machine o default machine l
+machine
+machine m machine t
+machine !
+machine b machine f
+machine ÿ
+machine s
+machine e
+machine g
+machine x

fuzz/wget_netrc_fuzzer.in/37943dae3f7740395fc9528fe1002d2114a30855

@@ -0,0 +1,77 @@
+dmaûssw
+!
+login
+
+lo
+login
+login
+
+lmaûssw
+!
+login
+
+lo
+login
+login
+
+login
+login
+login
+
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+ogin
+login
+login
+
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+

fuzz/wget_netrc_fuzzer.in/3b36b906d3152a7bf3efd92d86ff156efa657b26

@@ -0,0 +1,7 @@
+machine
+machine c machine Ő default
+machine .
+machine x machine u
+machine t machine l
+machine #
+machine y machine ě

fuzz/wget_netrc_fuzzer.in/3c0b22ceb9a63e99acaed61698db174901199283

@@ -0,0 +1,40 @@
+d!efault
+!
+login
+
+login
+login
+login
+
+login
+login
+login
+
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+login
+logi)n
+

fuzz/wget_netrc_fuzzer.in/3ca388c1ddf63fb078a84006686039455fbccfb1

@@ -0,0 +1 @@
+ûct=wget_ne û  û x 
 û û y x ) " ' . û û x ú û \\\\\\\\\\\\\\\\ | x 
 û û y . ú û } x 7 û û x 
 û û y . ú login 5 û û y a x û û  ) * 'û û x ú û | * . ’ . û û x û  û )  

fuzz/wget_netrc_fuzzer.in/3e5095f31ecaaa0fad51e5b904b916668fbd4105

@@ -0,0 +1,2 @@
+#
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fuzz/wget_netrc_fuzzer.in/3f9442ae73dd83e2456cf998cdd3260833241886

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fuzz/wget_netrc_fuzzer.in/44a27144db13228f5bf34a3ff6154498f418f32a

@@ -0,0 +1,13 @@
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fuzz/wget_netrc_fuzzer.in/460da6d310764b9e602e439b48e38020ff98f1dd

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fuzz/wget_netrc_fuzzer.in/483462d0f88b2dd959e396f94c5fec91fd3dbe6e

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fuzz/wget_netrc_fuzzer.in/4a80f2951fd532dd420188324de626fae3656c95

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fuzz/wget_netrc_fuzzer.in/4b356deea4a35cef94cdbb9f6fa67a08a203d9c7

@@ -0,0 +1,13 @@
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fuzz/wget_netrc_fuzzer.in/4bc8f9c65ab1ab78e9a644a86853b377341da860

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fuzz/wget_netrc_fuzzer.in/4d4ebe761c5a51989edf69a5362a160f75f8604f

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fuzz/wget_netrc_fuzzer.in/4dc7c9ec434ed06502767136789763ec11d2c4b7

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fuzz/wget_netrc_fuzzer.in/4e6a9bb31e90931335f05856bd6f85365022ac54

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fuzz/wget_netrc_fuzzer.in/4ee2c097ed830fb101e08b13e7369a5545476e1f

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fuzz/wget_netrc_fuzzer.in/4fa18c7c579ca7331f70231907f6236d9244848e

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fuzz/wget_netrc_fuzzer.in/4fc47fba313d15de75cf0150f6e7be81c9a398bf

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fuzz/wget_netrc_fuzzer.in/4ff12eb29d0034d3450b0f8755a5331230f610a1

@@ -0,0 +1,6 @@
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+default x.y login y hine a.bmaûûûûû
+logyn bûûûûû

fuzz/wget_netrc_fuzzer.in/52e551630839906c41dbcfff9a323dd8643bf430

@@ -0,0 +1,11 @@
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+machine t machine y machine o default machine c
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fuzz/wget_netrc_fuzzer.in/5356acdfff97e1ad9024287a6c6917fe47d12fd1

@@ -0,0 +1,6 @@
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+default default default default
+default default default default default default default default
+default default default default default default
+default default default default default default default default
+default default default default default

fuzz/wget_netrc_fuzzer.in/53b7d4b845ebc68f4e2fc48c055d6061b2e43160

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fuzz/wget_netrc_fuzzer.in/5476957a1cb555a72a6423a7706a575493c32747

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fuzz/wget_netrc_fuzzer.in/57332b4340d5c34418a984272e6cd9d77a4647c3

@@ -0,0 +1,4 @@
+#
+machine x.ymacdef ¥¥¥¥§¥¥¥¥login y passwordõôôôôôôø
+  x
+maûssword w

fuzz/wget_netrc_fuzzer.in/57582f46926a79c2f23c983c3a62781a0957b6e5

@@ -0,0 +1,319 @@
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fuzz/wget_netrc_fuzzer.in/57aa297a5e8a5ceab81380b0c1026978e33aebe9

@@ -0,0 +1,17 @@
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+tassw<EFBFBD>_bbb<EFBFBD>ord

fuzz/wget_netrc_fuzzer.in/5898505b447f722aa778b89ec477cc6fd7180dc2

@@ -0,0 +1,11 @@
+\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\swo
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