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fuzzer for sshsig allowed_signers option parsing

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This commit is contained in:
Damien Miller 2019-09-05 15:45:32 +10:00
parent 69159afe24
commit ae631ad77d
2 changed files with 36 additions and 2 deletions
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9
regress/misc/fuzz-harness/Makefile
View File

@ -7,7 +7,9 @@ CXXFLAGS=-O2 -g -Wall -Wextra -I ../../.. $(FUZZ_FLAGS)
LDFLAGS=-L ../../.. -L ../../../openbsd-compat -g $(FUZZ_FLAGS) LDFLAGS=-L ../../.. -L ../../../openbsd-compat -g $(FUZZ_FLAGS)
LIBS=-lssh -lopenbsd-compat -lcrypto $(FUZZ_LIBS) LIBS=-lssh -lopenbsd-compat -lcrypto $(FUZZ_LIBS)
all: pubkey_fuzz sig_fuzz authopt_fuzz sshsig_fuzz TARGETS=pubkey_fuzz sig_fuzz authopt_fuzz sshsig_fuzz sshsigopt_fuzz
all: $(TARGETS)
.cc.o: .cc.o:
$(CXX) $(CXXFLAGS) -c $< -o $@ $(CXX) $(CXXFLAGS) -c $< -o $@
@ -24,5 +26,8 @@ authopt_fuzz: authopt_fuzz.o
sshsig_fuzz: sshsig_fuzz.o sshsig_fuzz: sshsig_fuzz.o
$(CXX) -o $@ sshsig_fuzz.o ../../../sshsig.o $(LDFLAGS) $(LIBS) $(CXX) -o $@ sshsig_fuzz.o ../../../sshsig.o $(LDFLAGS) $(LIBS)
sshsigopt_fuzz: sshsigopt_fuzz.o
$(CXX) -o $@ sshsigopt_fuzz.o ../../../sshsig.o $(LDFLAGS) $(LIBS)
clean: clean:
-rm -f *.o pubkey_fuzz sig_fuzz authopt_fuzz -rm -f *.o $(TARGETS)

29
regress/misc/fuzz-harness/sshsigopt_fuzz.cc Normal file
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@ -0,0 +1,29 @@
#include <stddef.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
extern "C" {
#include "sshsig.h"
int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
char *cp = (char *)malloc(size + 1);
struct sshsigopt *opts = NULL;
if (cp == NULL)
goto out;
memcpy(cp, data, size);
cp[size] = '\0';
if ((opts = sshsigopt_parse(cp, "libfuzzer", 0, NULL)) == NULL)
goto out;
out:
free(cp);
sshsigopt_free(opts);
return 0;
}
} // extern "C"