diff options
Diffstat (limited to 'fuzz/gnutls_handshake_server_fuzzer.c')
| -rw-r--r-- | fuzz/gnutls_handshake_server_fuzzer.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/fuzz/gnutls_handshake_server_fuzzer.c b/fuzz/gnutls_handshake_server_fuzzer.c new file mode 100644 index 0000000..dd58cec --- /dev/null +++ b/fuzz/gnutls_handshake_server_fuzzer.c @@ -0,0 +1,138 @@ +/* +# Copyright 2017 Red Hat, Inc. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# +################################################################################ +*/ + +#include <assert.h> +#include <stdint.h> +#include <unistd.h> +#include <string.h> +#include <stdlib.h> + +#include <gnutls/crypto.h> +#include <gnutls/gnutls.h> + +#include "certs.h" +#include "handshake.h" +#include "fuzzer.h" + +int __attribute__ ((visibility ("protected"))) +gnutls_rnd(gnutls_rnd_level_t level, void *data, size_t len) +{ + memset(data, 0xff, len); + + /* Flip the first byte to avoid infinite loop in the RSA + * blinding code of Nettle */ + if (len > 0) + memset(data, 0x0, 1); + return 0; +} + +int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size) +{ + int res; + gnutls_datum_t rsa_cert, rsa_key; + gnutls_datum_t ecdsa_cert, ecdsa_key; + gnutls_datum_t ed25519_cert, ed25519_key; + gnutls_datum_t ed448_cert, ed448_key; + gnutls_session_t session; + gnutls_certificate_credentials_t xcred; + struct mem_st memdata; + unsigned int retry; + + res = gnutls_init(&session, GNUTLS_SERVER); + assert(res >= 0); + + res = gnutls_certificate_allocate_credentials(&xcred); + assert(res >= 0); + + rsa_cert.data = (unsigned char *)kRSACertificateDER; + rsa_cert.size = sizeof(kRSACertificateDER); + rsa_key.data = (unsigned char *)kRSAPrivateKeyDER; + rsa_key.size = sizeof(kRSAPrivateKeyDER); + + ecdsa_cert.data = (unsigned char *)kECDSACertificateDER; + ecdsa_cert.size = sizeof(kECDSACertificateDER); + ecdsa_key.data = (unsigned char *)kECDSAPrivateKeyDER; + ecdsa_key.size = sizeof(kECDSAPrivateKeyDER); + + ed25519_cert.data = (unsigned char *)kEd25519CertificateDER; + ed25519_cert.size = sizeof(kEd25519CertificateDER); + ed25519_key.data = (unsigned char *)kEd25519PrivateKeyDER; + ed25519_key.size = sizeof(kEd25519PrivateKeyDER); + + ed448_cert.data = (unsigned char *)kEd448CertificateDER; + ed448_cert.size = sizeof(kEd448CertificateDER); + ed448_key.data = (unsigned char *)kEd448PrivateKeyDER; + ed448_key.size = sizeof(kEd448PrivateKeyDER); + + res = + gnutls_certificate_set_x509_key_mem(xcred, &rsa_cert, &rsa_key, + GNUTLS_X509_FMT_DER); + assert(res >= 0); + + res = + gnutls_certificate_set_x509_key_mem(xcred, &ecdsa_cert, &ecdsa_key, + GNUTLS_X509_FMT_DER); + assert(res >= 0); + + res = + gnutls_certificate_set_x509_key_mem(xcred, &ed25519_cert, &ed25519_key, + GNUTLS_X509_FMT_DER); + assert(res >= 0); + + res = + gnutls_certificate_set_x509_key_mem(xcred, &ed448_cert, &ed448_key, + GNUTLS_X509_FMT_DER); + assert(res >= 0); + + gnutls_certificate_set_known_dh_params(xcred, GNUTLS_SEC_PARAM_MEDIUM); + + res = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred); + assert(res >= 0); + + /*res = gnutls_set_default_priority(session);*/ + res = gnutls_priority_set_direct(session, "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3", NULL); + assert(res >= 0); + + memdata.data = data; + memdata.size = size; + + gnutls_transport_set_push_function(session, error_push); + gnutls_transport_set_pull_function(session, error_pull); + gnutls_handshake_set_read_function(session, handshake_discard); + + retry = 0; + do { + res = gnutls_handshake(session); + if (res == GNUTLS_E_AGAIN) { + if (handshake_pull(session, &memdata) < 0) { + res = GNUTLS_E_INTERNAL_ERROR; + break; + } + if (retry > HANDSHAKE_MAX_RETRY_COUNT) { + break; + } + retry++; + } else { + retry = 0; + } + } while (res < 0 && gnutls_error_is_fatal(res) == 0); + + gnutls_deinit(session); + gnutls_certificate_free_credentials(xcred); + return 0; +} |