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author | Tom Vrancken <dev@tomvrancken.nl> | 2019-09-01 13:49:40 +0200 |
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committer | Tom Vrancken <dev@tomvrancken.nl> | 2019-09-02 20:39:04 +0200 |
commit | b1da7d4aa9ab8b821101287c3587bad70ffe77b5 (patch) | |
tree | 560b57668db864d4c870a7e266504b647922c593 /fuzz/gnutls_client_rawpk_fuzzer.c | |
parent | 28c5912c0445ab66ed4229e05bc7ed64f5fbcba3 (diff) | |
download | gnutls-b1da7d4aa9ab8b821101287c3587bad70ffe77b5.tar.gz |
Implemented client rawpk fuzzer.
Signed-off-by: Tom Vrancken <dev@tomvrancken.nl>
Diffstat (limited to 'fuzz/gnutls_client_rawpk_fuzzer.c')
-rw-r--r-- | fuzz/gnutls_client_rawpk_fuzzer.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/fuzz/gnutls_client_rawpk_fuzzer.c b/fuzz/gnutls_client_rawpk_fuzzer.c new file mode 100644 index 0000000000..c7208b0d1c --- /dev/null +++ b/fuzz/gnutls_client_rawpk_fuzzer.c @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2017 Nikos Mavrogiannopoulos + * Copyright (C) 2019 Tom Vrancken (dev@tomvrancken.nl) + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + */ + + +/*** + * This fuzzer tests the behavior of the GnuTLS library in client mode, + * specifically dealing with raw public keys during the handshake. + * + * The fuzzer corpus generated as first input was generated with the + * following parameters for gnutls-serv and gnutls-cli: + * + * gnutls-serv --priority NORMAL:+CTYPE-CLI-RAWPK:+CTYPE-SRV-RAWPK + * gnutls-cli localhost:5556 --priority NORMAL:-CTYPE-ALL:+CTYPE-CLI-RAWPK:+CTYPE-SRV-RAWPK --no-ca-verification + * + * The above yields a handshake where both the client and server present + * a raw public-key to eachother. + */ + +#include <assert.h> +#include <fcntl.h> +#include <stdint.h> +#include <sys/types.h> +#include <unistd.h> +#include <string.h> +#include <stdlib.h> +#include <stdbool.h> + +#include <gnutls/gnutls.h> + +#include "certs.h" +#include "mem.h" +#include "fuzzer.h" + +int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size) +{ + int res; + gnutls_session_t session; + gnutls_certificate_credentials_t rawpk_cred; + struct mem_st memdata; + + res = gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_ENABLE_RAWPK); + assert(res >= 0); + + res = gnutls_certificate_allocate_credentials(&rawpk_cred); + assert(res >= 0); + + res = + gnutls_certificate_set_rawpk_key_mem(rawpk_cred, + &rawpk_public_key1, + &rawpk_private_key1, + GNUTLS_X509_FMT_PEM, + NULL, 0, NULL, 0, 0); + assert(res >= 0); + + gnutls_certificate_set_known_dh_params(rawpk_cred, GNUTLS_SEC_PARAM_MEDIUM); + + res = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, rawpk_cred); + assert(res >= 0); + + res = gnutls_priority_set_direct(session, "NORMAL:"VERS_STR":-CTYPE-ALL:+CTYPE-CLI-RAWPK:+CTYPE-SRV-RAWPK", NULL); + assert(res >= 0); + + memdata.data = data; + memdata.size = size; + + gnutls_transport_set_push_function(session, mem_push); + gnutls_transport_set_pull_function(session, mem_pull); + gnutls_transport_set_pull_timeout_function(session, mem_pull_timeout); + gnutls_transport_set_ptr(session, &memdata); + + do { + res = gnutls_handshake(session); + } while (res < 0 && gnutls_error_is_fatal(res) == 0); + if (res >= 0) { + while (true) { + char buf[16384]; + res = gnutls_record_recv(session, buf, sizeof(buf)); + if (res <= 0) { + break; + } + } + } + + gnutls_deinit(session); + gnutls_certificate_free_credentials(rawpk_cred); + return 0; +} |