Squashed 'lib/mbedtls/external/mbedtls/' content from commit 2ca6c285a0dd

git-subtree-dir: lib/mbedtls/external/mbedtls
git-subtree-split: 2ca6c285a0dd3f33982dd57299012dacab1ff206

1 files changed, 216 insertions, 0 deletions

diff --git a/programs/fuzz/fuzz_server.c b/programs/fuzz/fuzz_server.c
new file mode 100644
index 00000000000..64b35edb9b0
--- /dev/null
+++ b/programs/fuzz/fuzz_server.c
@@ -0,0 +1,216 @@
+#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;
+}