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-rw-r--r--regress/unittests/sshbuf/test_sshbuf_getput_fuzz.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/regress/unittests/sshbuf/test_sshbuf_getput_fuzz.c b/regress/unittests/sshbuf/test_sshbuf_getput_fuzz.c
new file mode 100644
index 0000000..3b48958
--- /dev/null
+++ b/regress/unittests/sshbuf/test_sshbuf_getput_fuzz.c
@@ -0,0 +1,132 @@
+/* $OpenBSD: test_sshbuf_getput_fuzz.c,v 1.5 2021/12/14 21:25:27 deraadt Exp $ */
+/*
+ * Regress test for sshbuf.h buffer API
+ *
+ * Placed in the public domain
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#include <stdio.h>
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef WITH_OPENSSL
+#include <openssl/bn.h>
+#include <openssl/objects.h>
+#ifdef OPENSSL_HAS_NISTP256
+# include <openssl/ec.h>
+#endif
+#endif
+
+#include "../test_helper/test_helper.h"
+#include "ssherr.h"
+#include "sshbuf.h"
+
+void sshbuf_getput_fuzz_tests(void);
+
+static void
+attempt_parse_blob(u_char *blob, size_t len)
+{
+ struct sshbuf *p1;
+#ifdef WITH_OPENSSL
+ BIGNUM *bn;
+#if defined(OPENSSL_HAS_ECC) && defined(OPENSSL_HAS_NISTP256)
+ EC_KEY *eck;
+#endif /* defined(OPENSSL_HAS_ECC) && defined(OPENSSL_HAS_NISTP256) */
+#endif /* WITH_OPENSSL */
+ u_char *s;
+ size_t l;
+ u_int8_t u8;
+ u_int16_t u16;
+ u_int32_t u32;
+ u_int64_t u64;
+
+ p1 = sshbuf_new();
+ ASSERT_PTR_NE(p1, NULL);
+ ASSERT_INT_EQ(sshbuf_put(p1, blob, len), 0);
+ sshbuf_get_u8(p1, &u8);
+ sshbuf_get_u16(p1, &u16);
+ sshbuf_get_u32(p1, &u32);
+ sshbuf_get_u64(p1, &u64);
+ if (sshbuf_get_string(p1, &s, &l) == 0) {
+ bzero(s, l);
+ free(s);
+ }
+#ifdef WITH_OPENSSL
+ bn = NULL;
+ sshbuf_get_bignum2(p1, &bn);
+ BN_clear_free(bn);
+#if defined(OPENSSL_HAS_ECC) && defined(OPENSSL_HAS_NISTP256)
+ eck = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
+ ASSERT_PTR_NE(eck, NULL);
+ sshbuf_get_eckey(p1, eck);
+ EC_KEY_free(eck);
+#endif /* defined(OPENSSL_HAS_ECC) && defined(OPENSSL_HAS_NISTP256) */
+#endif /* WITH_OPENSSL */
+ sshbuf_free(p1);
+}
+
+
+static void
+onerror(void *fuzz)
+{
+ fprintf(stderr, "Failed during fuzz:\n");
+ fuzz_dump((struct fuzz *)fuzz);
+}
+
+void
+sshbuf_getput_fuzz_tests(void)
+{
+ u_char blob[] = {
+ /* u8 */
+ 0xd0,
+ /* u16 */
+ 0xc0, 0xde,
+ /* u32 */
+ 0xfa, 0xce, 0xde, 0xad,
+ /* u64 */
+ 0xfe, 0xed, 0xac, 0x1d, 0x1f, 0x1c, 0xbe, 0xef,
+ /* string */
+ 0x00, 0x00, 0x00, 0x09,
+ 'O', ' ', 'G', 'o', 'r', 'g', 'o', 'n', '!',
+ /* bignum2 */
+ 0x00, 0x00, 0x00, 0x14,
+ 0x00,
+ 0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
+ 0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
+ 0x7f, 0xff, 0x11,
+ /* EC point (NIST-256 curve) */
+ 0x00, 0x00, 0x00, 0x41,
+ 0x04,
+ 0x0c, 0x82, 0x80, 0x04, 0x83, 0x9d, 0x01, 0x06,
+ 0xaa, 0x59, 0x57, 0x52, 0x16, 0x19, 0x13, 0x57,
+ 0x34, 0xb4, 0x51, 0x45, 0x9d, 0xad, 0xb5, 0x86,
+ 0x67, 0x7e, 0xf9, 0xdf, 0x55, 0x78, 0x49, 0x99,
+ 0x4d, 0x19, 0x6b, 0x50, 0xf0, 0xb4, 0xe9, 0x4b,
+ 0x3c, 0x73, 0xe3, 0xa9, 0xd4, 0xcd, 0x9d, 0xf2,
+ 0xc8, 0xf9, 0xa3, 0x5e, 0x42, 0xbd, 0xd0, 0x47,
+ 0x55, 0x0f, 0x69, 0xd8, 0x0e, 0xc2, 0x3c, 0xd4,
+ };
+ struct fuzz *fuzz;
+ u_int fuzzers = FUZZ_1_BIT_FLIP | FUZZ_2_BIT_FLIP |
+ FUZZ_1_BYTE_FLIP | FUZZ_2_BYTE_FLIP |
+ FUZZ_TRUNCATE_START | FUZZ_TRUNCATE_END;
+
+ if (test_is_fast())
+ fuzzers &= ~(FUZZ_2_BYTE_FLIP|FUZZ_2_BIT_FLIP);
+
+ TEST_START("fuzz blob parsing");
+ fuzz = fuzz_begin(fuzzers, blob, sizeof(blob));
+ TEST_ONERROR(onerror, fuzz);
+ for(; !fuzz_done(fuzz); fuzz_next(fuzz))
+ attempt_parse_blob(blob, sizeof(blob));
+ fuzz_cleanup(fuzz);
+ TEST_DONE();
+ TEST_ONERROR(NULL, NULL);
+}
+