fuzz: add fuzz_cli_credentials_parse_string

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

diff --git a/lib/fuzzing/fuzz_cli_credentials_parse_string.c b/lib/fuzzing/fuzz_cli_credentials_parse_string.c
new file mode 100644 (file)
index 0000000..3b88109
--- /dev/null
+++ b/lib/fuzzing/fuzz_cli_credentials_parse_string.c
@@ -0,0 +1,57 @@
+/*
+  Fuzz NMB parse_packet
+  Copyright (C) Catalyst IT 2020
+
+  This program 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.
+
+  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "includes.h"
+#include "auth/credentials/credentials.h"
+#include "fuzzing/fuzzing.h"
+
+#define MAX_LENGTH (1024 * 10)
+char buf[MAX_LENGTH + 1];
+
+const enum credentials_obtained obtained = CRED_UNINITIALISED;
+
+
+int LLVMFuzzerTestOneInput(uint8_t *input, size_t len)
+{
+       TALLOC_CTX *mem_ctx = NULL;
+       struct cli_credentials *credentials = NULL;
+       bool anon;
+       const char *username;
+       const char *domain;
+
+       if (len > MAX_LENGTH) {
+               return 0;
+       }
+
+       memcpy(buf, input, len);
+       buf[len] = '\0';
+
+       mem_ctx = talloc_new(NULL);
+       credentials = cli_credentials_init(mem_ctx);
+
+       cli_credentials_parse_string(credentials, buf, obtained);
+
+       anon = cli_credentials_is_anonymous(credentials);
+
+       cli_credentials_get_ntlm_username_domain(credentials,
+                                                mem_ctx,
+                                                &username,
+                                                &domain);
+
+       talloc_free(mem_ctx);
+       return 0;
+}

diff --git a/lib/fuzzing/wscript_build b/lib/fuzzing/wscript_build
index 8bf0db000cf877ab5a592f87d1c5085c8789f1c0..1322d713d0b5f9c43fd806253952eaa7148af71d 100644 (file)
--- a/lib/fuzzing/wscript_build
+++ b/lib/fuzzing/wscript_build
@@ -77,6 +77,11 @@ bld.SAMBA_BINARY('fuzz_dcerpc_parse_binding',
                  deps='fuzzing dcerpc afl-fuzz-main',
                  fuzzer=True)
 
+bld.SAMBA_BINARY('fuzz_cli_credentials_parse_string',
+                 source='fuzz_cli_credentials_parse_string.c',
+                 deps='fuzzing samba-credentials afl-fuzz-main',
+                 fuzzer=True)
+
 # The fuzz_type and fuzz_function parameters make the built
 # fuzzer take the same input as ndrdump and so the same that
 # could be sent to the client or server as the stub data.