| #include "mbedtls/ssl.h" |
| #include "mbedtls/entropy.h" |
| #include "mbedtls/ctr_drbg.h" |
| #include "mbedtls/ssl_ticket.h" |
| #include "test/certs.h" |
| #include "common.h" |
| #include <string.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| |
| |
| #if defined(MBEDTLS_SSL_SRV_C) && \ |
| defined(MBEDTLS_ENTROPY_C) && \ |
| defined(MBEDTLS_CTR_DRBG_C) |
| const char *pers = "fuzz_server"; |
| static int initialized = 0; |
| #if defined(MBEDTLS_X509_CRT_PARSE_C) && defined(MBEDTLS_PEM_PARSE_C) |
| static mbedtls_x509_crt srvcert; |
| static mbedtls_pk_context pkey; |
| #endif |
| const char *alpn_list[3]; |
| |
| #if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED) |
| const unsigned char psk[] = { |
| 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, |
| 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f |
| }; |
| const char psk_id[] = "Client_identity"; |
| #endif |
| #endif // MBEDTLS_SSL_SRV_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C |
| |
| |
| int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) |
| { |
| #if defined(MBEDTLS_SSL_SRV_C) && \ |
| defined(MBEDTLS_ENTROPY_C) && \ |
| defined(MBEDTLS_CTR_DRBG_C) |
| int ret; |
| size_t len; |
| mbedtls_ssl_context ssl; |
| mbedtls_ssl_config conf; |
| mbedtls_ctr_drbg_context ctr_drbg; |
| mbedtls_entropy_context entropy; |
| #if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_TICKET_C) |
| mbedtls_ssl_ticket_context ticket_ctx; |
| #endif |
| unsigned char buf[4096]; |
| fuzzBufferOffset_t biomemfuzz; |
| uint8_t options; |
| |
| //we take 1 byte as options input |
| if (Size < 1) { |
| return 0; |
| } |
| options = Data[Size - 1]; |
| |
| mbedtls_ctr_drbg_init(&ctr_drbg); |
| mbedtls_entropy_init(&entropy); |
| #if defined(MBEDTLS_X509_CRT_PARSE_C) && defined(MBEDTLS_PEM_PARSE_C) |
| mbedtls_x509_crt_init(&srvcert); |
| mbedtls_pk_init(&pkey); |
| #endif |
| mbedtls_ssl_init(&ssl); |
| mbedtls_ssl_config_init(&conf); |
| #if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_TICKET_C) |
| mbedtls_ssl_ticket_init(&ticket_ctx); |
| #endif |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| psa_status_t status = psa_crypto_init(); |
| if (status != PSA_SUCCESS) { |
| goto exit; |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| if (mbedtls_ctr_drbg_seed(&ctr_drbg, dummy_entropy, &entropy, |
| (const unsigned char *) pers, strlen(pers)) != 0) { |
| return 1; |
| } |
| |
| if (initialized == 0) { |
| |
| #if defined(MBEDTLS_X509_CRT_PARSE_C) && defined(MBEDTLS_PEM_PARSE_C) |
| if (mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_srv_crt, |
| mbedtls_test_srv_crt_len) != 0) { |
| return 1; |
| } |
| if (mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_cas_pem, |
| mbedtls_test_cas_pem_len) != 0) { |
| return 1; |
| } |
| if (mbedtls_pk_parse_key(&pkey, (const unsigned char *) mbedtls_test_srv_key, |
| mbedtls_test_srv_key_len, NULL, 0, |
| dummy_random, &ctr_drbg) != 0) { |
| return 1; |
| } |
| #endif |
| |
| alpn_list[0] = "HTTP"; |
| alpn_list[1] = "fuzzalpn"; |
| alpn_list[2] = NULL; |
| |
| dummy_init(); |
| |
| initialized = 1; |
| } |
| |
| if (mbedtls_ssl_config_defaults(&conf, |
| MBEDTLS_SSL_IS_SERVER, |
| MBEDTLS_SSL_TRANSPORT_STREAM, |
| MBEDTLS_SSL_PRESET_DEFAULT) != 0) { |
| goto exit; |
| } |
| |
| srand(1); |
| mbedtls_ssl_conf_rng(&conf, dummy_random, &ctr_drbg); |
| |
| #if defined(MBEDTLS_X509_CRT_PARSE_C) && defined(MBEDTLS_PEM_PARSE_C) |
| mbedtls_ssl_conf_ca_chain(&conf, srvcert.next, NULL); |
| if (mbedtls_ssl_conf_own_cert(&conf, &srvcert, &pkey) != 0) { |
| goto exit; |
| } |
| #endif |
| |
| mbedtls_ssl_conf_cert_req_ca_list(&conf, |
| (options & |
| 0x1) ? MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED : MBEDTLS_SSL_CERT_REQ_CA_LIST_DISABLED); |
| #if defined(MBEDTLS_SSL_ALPN) |
| if (options & 0x2) { |
| mbedtls_ssl_conf_alpn_protocols(&conf, alpn_list); |
| } |
| #endif |
| #if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_TICKET_C) |
| if (options & 0x4) { |
| if (mbedtls_ssl_ticket_setup(&ticket_ctx, |
| dummy_random, &ctr_drbg, |
| MBEDTLS_CIPHER_AES_256_GCM, |
| 86400) != 0) { |
| goto exit; |
| } |
| |
| mbedtls_ssl_conf_session_tickets_cb(&conf, |
| mbedtls_ssl_ticket_write, |
| mbedtls_ssl_ticket_parse, |
| &ticket_ctx); |
| } |
| #endif |
| #if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) |
| mbedtls_ssl_conf_extended_master_secret(&conf, |
| (options & |
| 0x10) ? MBEDTLS_SSL_EXTENDED_MS_DISABLED : MBEDTLS_SSL_EXTENDED_MS_ENABLED); |
| #endif |
| #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) |
| mbedtls_ssl_conf_encrypt_then_mac(&conf, |
| (options & |
| 0x20) ? MBEDTLS_SSL_ETM_ENABLED : MBEDTLS_SSL_ETM_DISABLED); |
| #endif |
| #if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED) |
| if (options & 0x40) { |
| mbedtls_ssl_conf_psk(&conf, psk, sizeof(psk), |
| (const unsigned char *) psk_id, sizeof(psk_id) - 1); |
| } |
| #endif |
| #if defined(MBEDTLS_SSL_RENEGOTIATION) |
| mbedtls_ssl_conf_renegotiation(&conf, |
| (options & |
| 0x80) ? MBEDTLS_SSL_RENEGOTIATION_ENABLED : MBEDTLS_SSL_RENEGOTIATION_DISABLED); |
| #endif |
| |
| if (mbedtls_ssl_setup(&ssl, &conf) != 0) { |
| goto exit; |
| } |
| |
| biomemfuzz.Data = Data; |
| biomemfuzz.Size = Size-1; |
| biomemfuzz.Offset = 0; |
| mbedtls_ssl_set_bio(&ssl, &biomemfuzz, dummy_send, fuzz_recv, NULL); |
| |
| mbedtls_ssl_session_reset(&ssl); |
| ret = mbedtls_ssl_handshake(&ssl); |
| if (ret == 0) { |
| //keep reading data from server until the end |
| do { |
| len = sizeof(buf) - 1; |
| ret = mbedtls_ssl_read(&ssl, buf, len); |
| |
| if (ret == MBEDTLS_ERR_SSL_WANT_READ) { |
| continue; |
| } else if (ret <= 0) { |
| //EOF or error |
| break; |
| } |
| } while (1); |
| } |
| |
| exit: |
| #if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_TICKET_C) |
| mbedtls_ssl_ticket_free(&ticket_ctx); |
| #endif |
| mbedtls_entropy_free(&entropy); |
| mbedtls_ctr_drbg_free(&ctr_drbg); |
| mbedtls_ssl_config_free(&conf); |
| #if defined(MBEDTLS_X509_CRT_PARSE_C) && defined(MBEDTLS_PEM_PARSE_C) |
| mbedtls_x509_crt_free(&srvcert); |
| mbedtls_pk_free(&pkey); |
| #endif |
| mbedtls_ssl_free(&ssl); |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| mbedtls_psa_crypto_free(); |
| #endif |
| #else |
| (void) Data; |
| (void) Size; |
| #endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C */ |
| |
| return 0; |
| } |
