1 files changed, 130 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 000000000..8c3269b13
--- /dev/null
+++ b/regress/unittests/sshbuf/test_sshbuf_getput_fuzz.c
@@ -0,0 +1,130 @@
+/*      $OpenBSD: test_sshbuf_getput_fuzz.c,v 1.2 2014/05/02 02:54:00 djm Exp $ */
+/*
+ * Regress test for sshbuf.h buffer API
+ *
+ * Placed in the public domain
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdio.h>
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+
+#include <openssl/bn.h>
+#include <openssl/objects.h>
+#ifdef OPENSSL_HAS_NISTP256
+# include <openssl/ec.h>
+#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;
+        BIGNUM *bn;
+#ifdef OPENSSL_HAS_NISTP256
+        EC_KEY *eck;
+#endif
+        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);
+        }
+        bn = BN_new();
+        sshbuf_get_bignum1(p1, bn);
+        BN_clear_free(bn);
+        bn = BN_new();
+        sshbuf_get_bignum2(p1, bn);
+        BN_clear_free(bn);
+#ifdef 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
+        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', '!',
+                /* bignum1 */
+                0x79,
+                0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+                0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+                /* 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;
+
+        TEST_START("fuzz blob parsing");
+        fuzz = fuzz_begin(FUZZ_1_BIT_FLIP | FUZZ_2_BIT_FLIP |
+            FUZZ_1_BYTE_FLIP | FUZZ_2_BYTE_FLIP |
+            FUZZ_TRUNCATE_START | FUZZ_TRUNCATE_END, 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);
+}
+