diff options
Diffstat (limited to 'fuzz/gnutls_srp_server_fuzzer.c')
| -rw-r--r-- | fuzz/gnutls_srp_server_fuzzer.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/fuzz/gnutls_srp_server_fuzzer.c b/fuzz/gnutls_srp_server_fuzzer.c new file mode 100644 index 0000000..0430163 --- /dev/null +++ b/fuzz/gnutls_srp_server_fuzzer.c @@ -0,0 +1,151 @@ +/* + * Copyright (C) 2017 Nikos Mavrogiannopoulos + * + * 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. + * + */ + +#include <assert.h> +#include <stdint.h> +#include <unistd.h> +#include <string.h> +#include <stdlib.h> + +#include <gnutls/gnutls.h> + +#include "certs.h" +#include "srp.h" +#include "mem.h" +#include "fuzzer.h" + +static int +srp_cb(gnutls_session_t session, const char *username, + gnutls_datum_t *salt, gnutls_datum_t *verifier, gnutls_datum_t *generator, gnutls_datum_t *prime) +{ + int ret; + + salt->data = (unsigned char*)gnutls_malloc(SALT_SIZE); + memcpy(salt->data, (unsigned char*)SALT, SALT_SIZE); + salt->size = SALT_SIZE; + + generator->data = (unsigned char*)gnutls_malloc(gnutls_srp_1024_group_generator.size); + memcpy(generator->data, gnutls_srp_1024_group_generator.data, gnutls_srp_1024_group_generator.size); + generator->size = gnutls_srp_1024_group_generator.size; + + prime->data = (unsigned char*)gnutls_malloc(gnutls_srp_1024_group_prime.size); + memcpy(prime->data, gnutls_srp_1024_group_prime.data, gnutls_srp_1024_group_prime.size); + prime->size = gnutls_srp_1024_group_prime.size; + + ret = gnutls_srp_verifier(USERNAME, PASSWORD, salt, generator, prime, verifier); + if (ret < 0) + return -1; + + return 0; +} + +int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size) +{ + IGNORE_CERTS; + int res; + gnutls_datum_t rsa_cert, rsa_key; + gnutls_datum_t ecdsa_cert, ecdsa_key; + gnutls_datum_t ed25519_cert, ed25519_key; + gnutls_session_t session; + gnutls_certificate_credentials_t xcred; + gnutls_srp_server_credentials_t pcred; + struct mem_st memdata; + + res = gnutls_init(&session, GNUTLS_SERVER); + assert(res >= 0); + + res = gnutls_certificate_allocate_credentials(&xcred); + assert(res >= 0); + + res = gnutls_srp_allocate_server_credentials(&pcred); + assert(res >= 0); + + gnutls_srp_set_server_credentials_function(pcred, srp_cb); + + 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); + + 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); + + 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_credentials_set(session, GNUTLS_CRD_SRP, pcred); + assert(res >= 0); + + res = gnutls_priority_set_direct(session, "NORMAL:-KX-ALL:+SRP:+SRP-RSA:+SRP-DSS", 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) { + for (;;) { + char buf[16384]; + res = gnutls_record_recv(session, buf, sizeof(buf)); + if (res <= 0) { + break; + } + } + } + + gnutls_deinit(session); + gnutls_certificate_free_credentials(xcred); + gnutls_srp_free_server_credentials(pcred); + return 0; +} |